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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/ia64/hp
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/ia64/hp')
-rw-r--r--arch/ia64/hp/common/Makefile10
-rw-r--r--arch/ia64/hp/common/hwsw_iommu.c185
-rw-r--r--arch/ia64/hp/common/sba_iommu.c2121
-rw-r--r--arch/ia64/hp/sim/Kconfig20
-rw-r--r--arch/ia64/hp/sim/Makefile16
-rw-r--r--arch/ia64/hp/sim/boot/Makefile37
-rw-r--r--arch/ia64/hp/sim/boot/boot_head.S144
-rw-r--r--arch/ia64/hp/sim/boot/bootloader.c176
-rw-r--r--arch/ia64/hp/sim/boot/bootloader.lds65
-rw-r--r--arch/ia64/hp/sim/boot/fw-emu.c398
-rw-r--r--arch/ia64/hp/sim/boot/ssc.h35
-rw-r--r--arch/ia64/hp/sim/hpsim.S10
-rw-r--r--arch/ia64/hp/sim/hpsim_console.c65
-rw-r--r--arch/ia64/hp/sim/hpsim_irq.c51
-rw-r--r--arch/ia64/hp/sim/hpsim_machvec.c3
-rw-r--r--arch/ia64/hp/sim/hpsim_setup.c52
-rw-r--r--arch/ia64/hp/sim/hpsim_ssc.h36
-rw-r--r--arch/ia64/hp/sim/simeth.c530
-rw-r--r--arch/ia64/hp/sim/simscsi.c404
-rw-r--r--arch/ia64/hp/sim/simserial.c1032
-rw-r--r--arch/ia64/hp/zx1/Makefile8
-rw-r--r--arch/ia64/hp/zx1/hpzx1_machvec.c3
-rw-r--r--arch/ia64/hp/zx1/hpzx1_swiotlb_machvec.c3
23 files changed, 5404 insertions, 0 deletions
diff --git a/arch/ia64/hp/common/Makefile b/arch/ia64/hp/common/Makefile
new file mode 100644
index 000000000000..f61a60057ff7
--- /dev/null
+++ b/arch/ia64/hp/common/Makefile
@@ -0,0 +1,10 @@
1#
2# ia64/platform/hp/common/Makefile
3#
4# Copyright (C) 2002 Hewlett Packard
5# Copyright (C) Alex Williamson (alex_williamson@hp.com)
6#
7
8obj-y := sba_iommu.o
9obj-$(CONFIG_IA64_HP_ZX1_SWIOTLB) += hwsw_iommu.o
10obj-$(CONFIG_IA64_GENERIC) += hwsw_iommu.o
diff --git a/arch/ia64/hp/common/hwsw_iommu.c b/arch/ia64/hp/common/hwsw_iommu.c
new file mode 100644
index 000000000000..80f8ef013939
--- /dev/null
+++ b/arch/ia64/hp/common/hwsw_iommu.c
@@ -0,0 +1,185 @@
1/*
2 * Copyright (c) 2004 Hewlett-Packard Development Company, L.P.
3 * Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
4 *
5 * This is a pseudo I/O MMU which dispatches to the hardware I/O MMU
6 * whenever possible. We assume that the hardware I/O MMU requires
7 * full 32-bit addressability, as is the case, e.g., for HP zx1-based
8 * systems (there, the I/O MMU window is mapped at 3-4GB). If a
9 * device doesn't provide full 32-bit addressability, we fall back on
10 * the sw I/O TLB. This is good enough to let us support broken
11 * hardware such as soundcards which have a DMA engine that can
12 * address only 28 bits.
13 */
14
15#include <linux/device.h>
16
17#include <asm/machvec.h>
18
19/* swiotlb declarations & definitions: */
20extern void swiotlb_init_with_default_size (size_t size);
21extern ia64_mv_dma_alloc_coherent swiotlb_alloc_coherent;
22extern ia64_mv_dma_free_coherent swiotlb_free_coherent;
23extern ia64_mv_dma_map_single swiotlb_map_single;
24extern ia64_mv_dma_unmap_single swiotlb_unmap_single;
25extern ia64_mv_dma_map_sg swiotlb_map_sg;
26extern ia64_mv_dma_unmap_sg swiotlb_unmap_sg;
27extern ia64_mv_dma_supported swiotlb_dma_supported;
28extern ia64_mv_dma_mapping_error swiotlb_dma_mapping_error;
29
30/* hwiommu declarations & definitions: */
31
32extern ia64_mv_dma_alloc_coherent sba_alloc_coherent;
33extern ia64_mv_dma_free_coherent sba_free_coherent;
34extern ia64_mv_dma_map_single sba_map_single;
35extern ia64_mv_dma_unmap_single sba_unmap_single;
36extern ia64_mv_dma_map_sg sba_map_sg;
37extern ia64_mv_dma_unmap_sg sba_unmap_sg;
38extern ia64_mv_dma_supported sba_dma_supported;
39extern ia64_mv_dma_mapping_error sba_dma_mapping_error;
40
41#define hwiommu_alloc_coherent sba_alloc_coherent
42#define hwiommu_free_coherent sba_free_coherent
43#define hwiommu_map_single sba_map_single
44#define hwiommu_unmap_single sba_unmap_single
45#define hwiommu_map_sg sba_map_sg
46#define hwiommu_unmap_sg sba_unmap_sg
47#define hwiommu_dma_supported sba_dma_supported
48#define hwiommu_dma_mapping_error sba_dma_mapping_error
49#define hwiommu_sync_single_for_cpu machvec_dma_sync_single
50#define hwiommu_sync_sg_for_cpu machvec_dma_sync_sg
51#define hwiommu_sync_single_for_device machvec_dma_sync_single
52#define hwiommu_sync_sg_for_device machvec_dma_sync_sg
53
54
55/*
56 * Note: we need to make the determination of whether or not to use
57 * the sw I/O TLB based purely on the device structure. Anything else
58 * would be unreliable or would be too intrusive.
59 */
60static inline int
61use_swiotlb (struct device *dev)
62{
63 return dev && dev->dma_mask && !hwiommu_dma_supported(dev, *dev->dma_mask);
64}
65
66void
67hwsw_init (void)
68{
69 /* default to a smallish 2MB sw I/O TLB */
70 swiotlb_init_with_default_size (2 * (1<<20));
71}
72
73void *
74hwsw_alloc_coherent (struct device *dev, size_t size, dma_addr_t *dma_handle, int flags)
75{
76 if (use_swiotlb(dev))
77 return swiotlb_alloc_coherent(dev, size, dma_handle, flags);
78 else
79 return hwiommu_alloc_coherent(dev, size, dma_handle, flags);
80}
81
82void
83hwsw_free_coherent (struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle)
84{
85 if (use_swiotlb(dev))
86 swiotlb_free_coherent(dev, size, vaddr, dma_handle);
87 else
88 hwiommu_free_coherent(dev, size, vaddr, dma_handle);
89}
90
91dma_addr_t
92hwsw_map_single (struct device *dev, void *addr, size_t size, int dir)
93{
94 if (use_swiotlb(dev))
95 return swiotlb_map_single(dev, addr, size, dir);
96 else
97 return hwiommu_map_single(dev, addr, size, dir);
98}
99
100void
101hwsw_unmap_single (struct device *dev, dma_addr_t iova, size_t size, int dir)
102{
103 if (use_swiotlb(dev))
104 return swiotlb_unmap_single(dev, iova, size, dir);
105 else
106 return hwiommu_unmap_single(dev, iova, size, dir);
107}
108
109
110int
111hwsw_map_sg (struct device *dev, struct scatterlist *sglist, int nents, int dir)
112{
113 if (use_swiotlb(dev))
114 return swiotlb_map_sg(dev, sglist, nents, dir);
115 else
116 return hwiommu_map_sg(dev, sglist, nents, dir);
117}
118
119void
120hwsw_unmap_sg (struct device *dev, struct scatterlist *sglist, int nents, int dir)
121{
122 if (use_swiotlb(dev))
123 return swiotlb_unmap_sg(dev, sglist, nents, dir);
124 else
125 return hwiommu_unmap_sg(dev, sglist, nents, dir);
126}
127
128void
129hwsw_sync_single_for_cpu (struct device *dev, dma_addr_t addr, size_t size, int dir)
130{
131 if (use_swiotlb(dev))
132 swiotlb_sync_single_for_cpu(dev, addr, size, dir);
133 else
134 hwiommu_sync_single_for_cpu(dev, addr, size, dir);
135}
136
137void
138hwsw_sync_sg_for_cpu (struct device *dev, struct scatterlist *sg, int nelems, int dir)
139{
140 if (use_swiotlb(dev))
141 swiotlb_sync_sg_for_cpu(dev, sg, nelems, dir);
142 else
143 hwiommu_sync_sg_for_cpu(dev, sg, nelems, dir);
144}
145
146void
147hwsw_sync_single_for_device (struct device *dev, dma_addr_t addr, size_t size, int dir)
148{
149 if (use_swiotlb(dev))
150 swiotlb_sync_single_for_device(dev, addr, size, dir);
151 else
152 hwiommu_sync_single_for_device(dev, addr, size, dir);
153}
154
155void
156hwsw_sync_sg_for_device (struct device *dev, struct scatterlist *sg, int nelems, int dir)
157{
158 if (use_swiotlb(dev))
159 swiotlb_sync_sg_for_device(dev, sg, nelems, dir);
160 else
161 hwiommu_sync_sg_for_device(dev, sg, nelems, dir);
162}
163
164int
165hwsw_dma_supported (struct device *dev, u64 mask)
166{
167 if (hwiommu_dma_supported(dev, mask))
168 return 1;
169 return swiotlb_dma_supported(dev, mask);
170}
171
172int
173hwsw_dma_mapping_error (dma_addr_t dma_addr)
174{
175 return hwiommu_dma_mapping_error (dma_addr) || swiotlb_dma_mapping_error(dma_addr);
176}
177
178EXPORT_SYMBOL(hwsw_dma_mapping_error);
179EXPORT_SYMBOL(hwsw_map_single);
180EXPORT_SYMBOL(hwsw_unmap_single);
181EXPORT_SYMBOL(hwsw_map_sg);
182EXPORT_SYMBOL(hwsw_unmap_sg);
183EXPORT_SYMBOL(hwsw_dma_supported);
184EXPORT_SYMBOL(hwsw_alloc_coherent);
185EXPORT_SYMBOL(hwsw_free_coherent);
diff --git a/arch/ia64/hp/common/sba_iommu.c b/arch/ia64/hp/common/sba_iommu.c
new file mode 100644
index 000000000000..017c9ab5fc1b
--- /dev/null
+++ b/arch/ia64/hp/common/sba_iommu.c
@@ -0,0 +1,2121 @@
1/*
2** IA64 System Bus Adapter (SBA) I/O MMU manager
3**
4** (c) Copyright 2002-2004 Alex Williamson
5** (c) Copyright 2002-2003 Grant Grundler
6** (c) Copyright 2002-2004 Hewlett-Packard Company
7**
8** Portions (c) 2000 Grant Grundler (from parisc I/O MMU code)
9** Portions (c) 1999 Dave S. Miller (from sparc64 I/O MMU code)
10**
11** This program is free software; you can redistribute it and/or modify
12** it under the terms of the GNU General Public License as published by
13** the Free Software Foundation; either version 2 of the License, or
14** (at your option) any later version.
15**
16**
17** This module initializes the IOC (I/O Controller) found on HP
18** McKinley machines and their successors.
19**
20*/
21
22#include <linux/config.h>
23#include <linux/types.h>
24#include <linux/kernel.h>
25#include <linux/module.h>
26#include <linux/spinlock.h>
27#include <linux/slab.h>
28#include <linux/init.h>
29#include <linux/mm.h>
30#include <linux/string.h>
31#include <linux/pci.h>
32#include <linux/proc_fs.h>
33#include <linux/seq_file.h>
34#include <linux/acpi.h>
35#include <linux/efi.h>
36#include <linux/nodemask.h>
37#include <linux/bitops.h> /* hweight64() */
38
39#include <asm/delay.h> /* ia64_get_itc() */
40#include <asm/io.h>
41#include <asm/page.h> /* PAGE_OFFSET */
42#include <asm/dma.h>
43#include <asm/system.h> /* wmb() */
44
45#include <asm/acpi-ext.h>
46
47#define PFX "IOC: "
48
49/*
50** Enabling timing search of the pdir resource map. Output in /proc.
51** Disabled by default to optimize performance.
52*/
53#undef PDIR_SEARCH_TIMING
54
55/*
56** This option allows cards capable of 64bit DMA to bypass the IOMMU. If
57** not defined, all DMA will be 32bit and go through the TLB.
58** There's potentially a conflict in the bio merge code with us
59** advertising an iommu, but then bypassing it. Since I/O MMU bypassing
60** appears to give more performance than bio-level virtual merging, we'll
61** do the former for now. NOTE: BYPASS_SG also needs to be undef'd to
62** completely restrict DMA to the IOMMU.
63*/
64#define ALLOW_IOV_BYPASS
65
66/*
67** This option specifically allows/disallows bypassing scatterlists with
68** multiple entries. Coalescing these entries can allow better DMA streaming
69** and in some cases shows better performance than entirely bypassing the
70** IOMMU. Performance increase on the order of 1-2% sequential output/input
71** using bonnie++ on a RAID0 MD device (sym2 & mpt).
72*/
73#undef ALLOW_IOV_BYPASS_SG
74
75/*
76** If a device prefetches beyond the end of a valid pdir entry, it will cause
77** a hard failure, ie. MCA. Version 3.0 and later of the zx1 LBA should
78** disconnect on 4k boundaries and prevent such issues. If the device is
79** particularly agressive, this option will keep the entire pdir valid such
80** that prefetching will hit a valid address. This could severely impact
81** error containment, and is therefore off by default. The page that is
82** used for spill-over is poisoned, so that should help debugging somewhat.
83*/
84#undef FULL_VALID_PDIR
85
86#define ENABLE_MARK_CLEAN
87
88/*
89** The number of debug flags is a clue - this code is fragile. NOTE: since
90** tightening the use of res_lock the resource bitmap and actual pdir are no
91** longer guaranteed to stay in sync. The sanity checking code isn't going to
92** like that.
93*/
94#undef DEBUG_SBA_INIT
95#undef DEBUG_SBA_RUN
96#undef DEBUG_SBA_RUN_SG
97#undef DEBUG_SBA_RESOURCE
98#undef ASSERT_PDIR_SANITY
99#undef DEBUG_LARGE_SG_ENTRIES
100#undef DEBUG_BYPASS
101
102#if defined(FULL_VALID_PDIR) && defined(ASSERT_PDIR_SANITY)
103#error FULL_VALID_PDIR and ASSERT_PDIR_SANITY are mutually exclusive
104#endif
105
106#define SBA_INLINE __inline__
107/* #define SBA_INLINE */
108
109#ifdef DEBUG_SBA_INIT
110#define DBG_INIT(x...) printk(x)
111#else
112#define DBG_INIT(x...)
113#endif
114
115#ifdef DEBUG_SBA_RUN
116#define DBG_RUN(x...) printk(x)
117#else
118#define DBG_RUN(x...)
119#endif
120
121#ifdef DEBUG_SBA_RUN_SG
122#define DBG_RUN_SG(x...) printk(x)
123#else
124#define DBG_RUN_SG(x...)
125#endif
126
127
128#ifdef DEBUG_SBA_RESOURCE
129#define DBG_RES(x...) printk(x)
130#else
131#define DBG_RES(x...)
132#endif
133
134#ifdef DEBUG_BYPASS
135#define DBG_BYPASS(x...) printk(x)
136#else
137#define DBG_BYPASS(x...)
138#endif
139
140#ifdef ASSERT_PDIR_SANITY
141#define ASSERT(expr) \
142 if(!(expr)) { \
143 printk( "\n" __FILE__ ":%d: Assertion " #expr " failed!\n",__LINE__); \
144 panic(#expr); \
145 }
146#else
147#define ASSERT(expr)
148#endif
149
150/*
151** The number of pdir entries to "free" before issuing
152** a read to PCOM register to flush out PCOM writes.
153** Interacts with allocation granularity (ie 4 or 8 entries
154** allocated and free'd/purged at a time might make this
155** less interesting).
156*/
157#define DELAYED_RESOURCE_CNT 64
158
159#define ZX1_IOC_ID ((PCI_DEVICE_ID_HP_ZX1_IOC << 16) | PCI_VENDOR_ID_HP)
160#define ZX2_IOC_ID ((PCI_DEVICE_ID_HP_ZX2_IOC << 16) | PCI_VENDOR_ID_HP)
161#define REO_IOC_ID ((PCI_DEVICE_ID_HP_REO_IOC << 16) | PCI_VENDOR_ID_HP)
162#define SX1000_IOC_ID ((PCI_DEVICE_ID_HP_SX1000_IOC << 16) | PCI_VENDOR_ID_HP)
163
164#define ZX1_IOC_OFFSET 0x1000 /* ACPI reports SBA, we want IOC */
165
166#define IOC_FUNC_ID 0x000
167#define IOC_FCLASS 0x008 /* function class, bist, header, rev... */
168#define IOC_IBASE 0x300 /* IO TLB */
169#define IOC_IMASK 0x308
170#define IOC_PCOM 0x310
171#define IOC_TCNFG 0x318
172#define IOC_PDIR_BASE 0x320
173
174#define IOC_ROPE0_CFG 0x500
175#define IOC_ROPE_AO 0x10 /* Allow "Relaxed Ordering" */
176
177
178/* AGP GART driver looks for this */
179#define ZX1_SBA_IOMMU_COOKIE 0x0000badbadc0ffeeUL
180
181/*
182** The zx1 IOC supports 4/8/16/64KB page sizes (see TCNFG register)
183**
184** Some IOCs (sx1000) can run at the above pages sizes, but are
185** really only supported using the IOC at a 4k page size.
186**
187** iovp_size could only be greater than PAGE_SIZE if we are
188** confident the drivers really only touch the next physical
189** page iff that driver instance owns it.
190*/
191static unsigned long iovp_size;
192static unsigned long iovp_shift;
193static unsigned long iovp_mask;
194
195struct ioc {
196 void __iomem *ioc_hpa; /* I/O MMU base address */
197 char *res_map; /* resource map, bit == pdir entry */
198 u64 *pdir_base; /* physical base address */
199 unsigned long ibase; /* pdir IOV Space base */
200 unsigned long imask; /* pdir IOV Space mask */
201
202 unsigned long *res_hint; /* next avail IOVP - circular search */
203 unsigned long dma_mask;
204 spinlock_t res_lock; /* protects the resource bitmap, but must be held when */
205 /* clearing pdir to prevent races with allocations. */
206 unsigned int res_bitshift; /* from the RIGHT! */
207 unsigned int res_size; /* size of resource map in bytes */
208#ifdef CONFIG_NUMA
209 unsigned int node; /* node where this IOC lives */
210#endif
211#if DELAYED_RESOURCE_CNT > 0
212 spinlock_t saved_lock; /* may want to try to get this on a separate cacheline */
213 /* than res_lock for bigger systems. */
214 int saved_cnt;
215 struct sba_dma_pair {
216 dma_addr_t iova;
217 size_t size;
218 } saved[DELAYED_RESOURCE_CNT];
219#endif
220
221#ifdef PDIR_SEARCH_TIMING
222#define SBA_SEARCH_SAMPLE 0x100
223 unsigned long avg_search[SBA_SEARCH_SAMPLE];
224 unsigned long avg_idx; /* current index into avg_search */
225#endif
226
227 /* Stuff we don't need in performance path */
228 struct ioc *next; /* list of IOC's in system */
229 acpi_handle handle; /* for multiple IOC's */
230 const char *name;
231 unsigned int func_id;
232 unsigned int rev; /* HW revision of chip */
233 u32 iov_size;
234 unsigned int pdir_size; /* in bytes, determined by IOV Space size */
235 struct pci_dev *sac_only_dev;
236};
237
238static struct ioc *ioc_list;
239static int reserve_sba_gart = 1;
240
241static SBA_INLINE void sba_mark_invalid(struct ioc *, dma_addr_t, size_t);
242static SBA_INLINE void sba_free_range(struct ioc *, dma_addr_t, size_t);
243
244#define sba_sg_address(sg) (page_address((sg)->page) + (sg)->offset)
245
246#ifdef FULL_VALID_PDIR
247static u64 prefetch_spill_page;
248#endif
249
250#ifdef CONFIG_PCI
251# define GET_IOC(dev) (((dev)->bus == &pci_bus_type) \
252 ? ((struct ioc *) PCI_CONTROLLER(to_pci_dev(dev))->iommu) : NULL)
253#else
254# define GET_IOC(dev) NULL
255#endif
256
257/*
258** DMA_CHUNK_SIZE is used by the SCSI mid-layer to break up
259** (or rather not merge) DMA's into managable chunks.
260** On parisc, this is more of the software/tuning constraint
261** rather than the HW. I/O MMU allocation alogorithms can be
262** faster with smaller size is (to some degree).
263*/
264#define DMA_CHUNK_SIZE (BITS_PER_LONG*iovp_size)
265
266#define ROUNDUP(x,y) ((x + ((y)-1)) & ~((y)-1))
267
268/************************************
269** SBA register read and write support
270**
271** BE WARNED: register writes are posted.
272** (ie follow writes which must reach HW with a read)
273**
274*/
275#define READ_REG(addr) __raw_readq(addr)
276#define WRITE_REG(val, addr) __raw_writeq(val, addr)
277
278#ifdef DEBUG_SBA_INIT
279
280/**
281 * sba_dump_tlb - debugging only - print IOMMU operating parameters
282 * @hpa: base address of the IOMMU
283 *
284 * Print the size/location of the IO MMU PDIR.
285 */
286static void
287sba_dump_tlb(char *hpa)
288{
289 DBG_INIT("IO TLB at 0x%p\n", (void *)hpa);
290 DBG_INIT("IOC_IBASE : %016lx\n", READ_REG(hpa+IOC_IBASE));
291 DBG_INIT("IOC_IMASK : %016lx\n", READ_REG(hpa+IOC_IMASK));
292 DBG_INIT("IOC_TCNFG : %016lx\n", READ_REG(hpa+IOC_TCNFG));
293 DBG_INIT("IOC_PDIR_BASE: %016lx\n", READ_REG(hpa+IOC_PDIR_BASE));
294 DBG_INIT("\n");
295}
296#endif
297
298
299#ifdef ASSERT_PDIR_SANITY
300
301/**
302 * sba_dump_pdir_entry - debugging only - print one IOMMU PDIR entry
303 * @ioc: IO MMU structure which owns the pdir we are interested in.
304 * @msg: text to print ont the output line.
305 * @pide: pdir index.
306 *
307 * Print one entry of the IO MMU PDIR in human readable form.
308 */
309static void
310sba_dump_pdir_entry(struct ioc *ioc, char *msg, uint pide)
311{
312 /* start printing from lowest pde in rval */
313 u64 *ptr = &ioc->pdir_base[pide & ~(BITS_PER_LONG - 1)];
314 unsigned long *rptr = (unsigned long *) &ioc->res_map[(pide >>3) & -sizeof(unsigned long)];
315 uint rcnt;
316
317 printk(KERN_DEBUG "SBA: %s rp %p bit %d rval 0x%lx\n",
318 msg, rptr, pide & (BITS_PER_LONG - 1), *rptr);
319
320 rcnt = 0;
321 while (rcnt < BITS_PER_LONG) {
322 printk(KERN_DEBUG "%s %2d %p %016Lx\n",
323 (rcnt == (pide & (BITS_PER_LONG - 1)))
324 ? " -->" : " ",
325 rcnt, ptr, (unsigned long long) *ptr );
326 rcnt++;
327 ptr++;
328 }
329 printk(KERN_DEBUG "%s", msg);
330}
331
332
333/**
334 * sba_check_pdir - debugging only - consistency checker
335 * @ioc: IO MMU structure which owns the pdir we are interested in.
336 * @msg: text to print ont the output line.
337 *
338 * Verify the resource map and pdir state is consistent
339 */
340static int
341sba_check_pdir(struct ioc *ioc, char *msg)
342{
343 u64 *rptr_end = (u64 *) &(ioc->res_map[ioc->res_size]);
344 u64 *rptr = (u64 *) ioc->res_map; /* resource map ptr */
345 u64 *pptr = ioc->pdir_base; /* pdir ptr */
346 uint pide = 0;
347
348 while (rptr < rptr_end) {
349 u64 rval;
350 int rcnt; /* number of bits we might check */
351
352 rval = *rptr;
353 rcnt = 64;
354
355 while (rcnt) {
356 /* Get last byte and highest bit from that */
357 u32 pde = ((u32)((*pptr >> (63)) & 0x1));
358 if ((rval & 0x1) ^ pde)
359 {
360 /*
361 ** BUMMER! -- res_map != pdir --
362 ** Dump rval and matching pdir entries
363 */
364 sba_dump_pdir_entry(ioc, msg, pide);
365 return(1);
366 }
367 rcnt--;
368 rval >>= 1; /* try the next bit */
369 pptr++;
370 pide++;
371 }
372 rptr++; /* look at next word of res_map */
373 }
374 /* It'd be nice if we always got here :^) */
375 return 0;
376}
377
378
379/**
380 * sba_dump_sg - debugging only - print Scatter-Gather list
381 * @ioc: IO MMU structure which owns the pdir we are interested in.
382 * @startsg: head of the SG list
383 * @nents: number of entries in SG list
384 *
385 * print the SG list so we can verify it's correct by hand.
386 */
387static void
388sba_dump_sg( struct ioc *ioc, struct scatterlist *startsg, int nents)
389{
390 while (nents-- > 0) {
391 printk(KERN_DEBUG " %d : DMA %08lx/%05x CPU %p\n", nents,
392 startsg->dma_address, startsg->dma_length,
393 sba_sg_address(startsg));
394 startsg++;
395 }
396}
397
398static void
399sba_check_sg( struct ioc *ioc, struct scatterlist *startsg, int nents)
400{
401 struct scatterlist *the_sg = startsg;
402 int the_nents = nents;
403
404 while (the_nents-- > 0) {
405 if (sba_sg_address(the_sg) == 0x0UL)
406 sba_dump_sg(NULL, startsg, nents);
407 the_sg++;
408 }
409}
410
411#endif /* ASSERT_PDIR_SANITY */
412
413
414
415
416/**************************************************************
417*
418* I/O Pdir Resource Management
419*
420* Bits set in the resource map are in use.
421* Each bit can represent a number of pages.
422* LSbs represent lower addresses (IOVA's).
423*
424***************************************************************/
425#define PAGES_PER_RANGE 1 /* could increase this to 4 or 8 if needed */
426
427/* Convert from IOVP to IOVA and vice versa. */
428#define SBA_IOVA(ioc,iovp,offset) ((ioc->ibase) | (iovp) | (offset))
429#define SBA_IOVP(ioc,iova) ((iova) & ~(ioc->ibase))
430
431#define PDIR_ENTRY_SIZE sizeof(u64)
432
433#define PDIR_INDEX(iovp) ((iovp)>>iovp_shift)
434
435#define RESMAP_MASK(n) ~(~0UL << (n))
436#define RESMAP_IDX_MASK (sizeof(unsigned long) - 1)
437
438
439/**
440 * For most cases the normal get_order is sufficient, however it limits us
441 * to PAGE_SIZE being the minimum mapping alignment and TC flush granularity.
442 * It only incurs about 1 clock cycle to use this one with the static variable
443 * and makes the code more intuitive.
444 */
445static SBA_INLINE int
446get_iovp_order (unsigned long size)
447{
448 long double d = size - 1;
449 long order;
450
451 order = ia64_getf_exp(d);
452 order = order - iovp_shift - 0xffff + 1;
453 if (order < 0)
454 order = 0;
455 return order;
456}
457
458/**
459 * sba_search_bitmap - find free space in IO PDIR resource bitmap
460 * @ioc: IO MMU structure which owns the pdir we are interested in.
461 * @bits_wanted: number of entries we need.
462 *
463 * Find consecutive free bits in resource bitmap.
464 * Each bit represents one entry in the IO Pdir.
465 * Cool perf optimization: search for log2(size) bits at a time.
466 */
467static SBA_INLINE unsigned long
468sba_search_bitmap(struct ioc *ioc, unsigned long bits_wanted)
469{
470 unsigned long *res_ptr = ioc->res_hint;
471 unsigned long *res_end = (unsigned long *) &(ioc->res_map[ioc->res_size]);
472 unsigned long pide = ~0UL;
473
474 ASSERT(((unsigned long) ioc->res_hint & (sizeof(unsigned long) - 1UL)) == 0);
475 ASSERT(res_ptr < res_end);
476
477 /*
478 * N.B. REO/Grande defect AR2305 can cause TLB fetch timeouts
479 * if a TLB entry is purged while in use. sba_mark_invalid()
480 * purges IOTLB entries in power-of-two sizes, so we also
481 * allocate IOVA space in power-of-two sizes.
482 */
483 bits_wanted = 1UL << get_iovp_order(bits_wanted << iovp_shift);
484
485 if (likely(bits_wanted == 1)) {
486 unsigned int bitshiftcnt;
487 for(; res_ptr < res_end ; res_ptr++) {
488 if (likely(*res_ptr != ~0UL)) {
489 bitshiftcnt = ffz(*res_ptr);
490 *res_ptr |= (1UL << bitshiftcnt);
491 pide = ((unsigned long)res_ptr - (unsigned long)ioc->res_map);
492 pide <<= 3; /* convert to bit address */
493 pide += bitshiftcnt;
494 ioc->res_bitshift = bitshiftcnt + bits_wanted;
495 goto found_it;
496 }
497 }
498 goto not_found;
499
500 }
501
502 if (likely(bits_wanted <= BITS_PER_LONG/2)) {
503 /*
504 ** Search the resource bit map on well-aligned values.
505 ** "o" is the alignment.
506 ** We need the alignment to invalidate I/O TLB using
507 ** SBA HW features in the unmap path.
508 */
509 unsigned long o = 1 << get_iovp_order(bits_wanted << iovp_shift);
510 uint bitshiftcnt = ROUNDUP(ioc->res_bitshift, o);
511 unsigned long mask, base_mask;
512
513 base_mask = RESMAP_MASK(bits_wanted);
514 mask = base_mask << bitshiftcnt;
515
516 DBG_RES("%s() o %ld %p", __FUNCTION__, o, res_ptr);
517 for(; res_ptr < res_end ; res_ptr++)
518 {
519 DBG_RES(" %p %lx %lx\n", res_ptr, mask, *res_ptr);
520 ASSERT(0 != mask);
521 for (; mask ; mask <<= o, bitshiftcnt += o) {
522 if(0 == ((*res_ptr) & mask)) {
523 *res_ptr |= mask; /* mark resources busy! */
524 pide = ((unsigned long)res_ptr - (unsigned long)ioc->res_map);
525 pide <<= 3; /* convert to bit address */
526 pide += bitshiftcnt;
527 ioc->res_bitshift = bitshiftcnt + bits_wanted;
528 goto found_it;
529 }
530 }
531
532 bitshiftcnt = 0;
533 mask = base_mask;
534
535 }
536
537 } else {
538 int qwords, bits, i;
539 unsigned long *end;
540
541 qwords = bits_wanted >> 6; /* /64 */
542 bits = bits_wanted - (qwords * BITS_PER_LONG);
543
544 end = res_end - qwords;
545
546 for (; res_ptr < end; res_ptr++) {
547 for (i = 0 ; i < qwords ; i++) {
548 if (res_ptr[i] != 0)
549 goto next_ptr;
550 }
551 if (bits && res_ptr[i] && (__ffs(res_ptr[i]) < bits))
552 continue;
553
554 /* Found it, mark it */
555 for (i = 0 ; i < qwords ; i++)
556 res_ptr[i] = ~0UL;
557 res_ptr[i] |= RESMAP_MASK(bits);
558
559 pide = ((unsigned long)res_ptr - (unsigned long)ioc->res_map);
560 pide <<= 3; /* convert to bit address */
561 res_ptr += qwords;
562 ioc->res_bitshift = bits;
563 goto found_it;
564next_ptr:
565 ;
566 }
567 }
568
569not_found:
570 prefetch(ioc->res_map);
571 ioc->res_hint = (unsigned long *) ioc->res_map;
572 ioc->res_bitshift = 0;
573 return (pide);
574
575found_it:
576 ioc->res_hint = res_ptr;
577 return (pide);
578}
579
580
581/**
582 * sba_alloc_range - find free bits and mark them in IO PDIR resource bitmap
583 * @ioc: IO MMU structure which owns the pdir we are interested in.
584 * @size: number of bytes to create a mapping for
585 *
586 * Given a size, find consecutive unmarked and then mark those bits in the
587 * resource bit map.
588 */
589static int
590sba_alloc_range(struct ioc *ioc, size_t size)
591{
592 unsigned int pages_needed = size >> iovp_shift;
593#ifdef PDIR_SEARCH_TIMING
594 unsigned long itc_start;
595#endif
596 unsigned long pide;
597 unsigned long flags;
598
599 ASSERT(pages_needed);
600 ASSERT(0 == (size & ~iovp_mask));
601
602 spin_lock_irqsave(&ioc->res_lock, flags);
603
604#ifdef PDIR_SEARCH_TIMING
605 itc_start = ia64_get_itc();
606#endif
607 /*
608 ** "seek and ye shall find"...praying never hurts either...
609 */
610 pide = sba_search_bitmap(ioc, pages_needed);
611 if (unlikely(pide >= (ioc->res_size << 3))) {
612 pide = sba_search_bitmap(ioc, pages_needed);
613 if (unlikely(pide >= (ioc->res_size << 3))) {
614#if DELAYED_RESOURCE_CNT > 0
615 /*
616 ** With delayed resource freeing, we can give this one more shot. We're
617 ** getting close to being in trouble here, so do what we can to make this
618 ** one count.
619 */
620 spin_lock(&ioc->saved_lock);
621 if (ioc->saved_cnt > 0) {
622 struct sba_dma_pair *d;
623 int cnt = ioc->saved_cnt;
624
625 d = &(ioc->saved[ioc->saved_cnt]);
626
627 while (cnt--) {
628 sba_mark_invalid(ioc, d->iova, d->size);
629 sba_free_range(ioc, d->iova, d->size);
630 d--;
631 }
632 ioc->saved_cnt = 0;
633 READ_REG(ioc->ioc_hpa+IOC_PCOM); /* flush purges */
634 }
635 spin_unlock(&ioc->saved_lock);
636
637 pide = sba_search_bitmap(ioc, pages_needed);
638 if (unlikely(pide >= (ioc->res_size << 3)))
639 panic(__FILE__ ": I/O MMU @ %p is out of mapping resources\n",
640 ioc->ioc_hpa);
641#else
642 panic(__FILE__ ": I/O MMU @ %p is out of mapping resources\n",
643 ioc->ioc_hpa);
644#endif
645 }
646 }
647
648#ifdef PDIR_SEARCH_TIMING
649 ioc->avg_search[ioc->avg_idx++] = (ia64_get_itc() - itc_start) / pages_needed;
650 ioc->avg_idx &= SBA_SEARCH_SAMPLE - 1;
651#endif
652
653 prefetchw(&(ioc->pdir_base[pide]));
654
655#ifdef ASSERT_PDIR_SANITY
656 /* verify the first enable bit is clear */
657 if(0x00 != ((u8 *) ioc->pdir_base)[pide*PDIR_ENTRY_SIZE + 7]) {
658 sba_dump_pdir_entry(ioc, "sba_search_bitmap() botched it?", pide);
659 }
660#endif
661
662 DBG_RES("%s(%x) %d -> %lx hint %x/%x\n",
663 __FUNCTION__, size, pages_needed, pide,
664 (uint) ((unsigned long) ioc->res_hint - (unsigned long) ioc->res_map),
665 ioc->res_bitshift );
666
667 spin_unlock_irqrestore(&ioc->res_lock, flags);
668
669 return (pide);
670}
671
672
673/**
674 * sba_free_range - unmark bits in IO PDIR resource bitmap
675 * @ioc: IO MMU structure which owns the pdir we are interested in.
676 * @iova: IO virtual address which was previously allocated.
677 * @size: number of bytes to create a mapping for
678 *
679 * clear bits in the ioc's resource map
680 */
681static SBA_INLINE void
682sba_free_range(struct ioc *ioc, dma_addr_t iova, size_t size)
683{
684 unsigned long iovp = SBA_IOVP(ioc, iova);
685 unsigned int pide = PDIR_INDEX(iovp);
686 unsigned int ridx = pide >> 3; /* convert bit to byte address */
687 unsigned long *res_ptr = (unsigned long *) &((ioc)->res_map[ridx & ~RESMAP_IDX_MASK]);
688 int bits_not_wanted = size >> iovp_shift;
689 unsigned long m;
690
691 /* Round up to power-of-two size: see AR2305 note above */
692 bits_not_wanted = 1UL << get_iovp_order(bits_not_wanted << iovp_shift);
693 for (; bits_not_wanted > 0 ; res_ptr++) {
694
695 if (unlikely(bits_not_wanted > BITS_PER_LONG)) {
696
697 /* these mappings start 64bit aligned */
698 *res_ptr = 0UL;
699 bits_not_wanted -= BITS_PER_LONG;
700 pide += BITS_PER_LONG;
701
702 } else {
703
704 /* 3-bits "bit" address plus 2 (or 3) bits for "byte" == bit in word */
705 m = RESMAP_MASK(bits_not_wanted) << (pide & (BITS_PER_LONG - 1));
706 bits_not_wanted = 0;
707
708 DBG_RES("%s( ,%x,%x) %x/%lx %x %p %lx\n", __FUNCTION__, (uint) iova, size,
709 bits_not_wanted, m, pide, res_ptr, *res_ptr);
710
711 ASSERT(m != 0);
712 ASSERT(bits_not_wanted);
713 ASSERT((*res_ptr & m) == m); /* verify same bits are set */
714 *res_ptr &= ~m;
715 }
716 }
717}
718
719
720/**************************************************************
721*
722* "Dynamic DMA Mapping" support (aka "Coherent I/O")
723*
724***************************************************************/
725
726/**
727 * sba_io_pdir_entry - fill in one IO PDIR entry
728 * @pdir_ptr: pointer to IO PDIR entry
729 * @vba: Virtual CPU address of buffer to map
730 *
731 * SBA Mapping Routine
732 *
733 * Given a virtual address (vba, arg1) sba_io_pdir_entry()
734 * loads the I/O PDIR entry pointed to by pdir_ptr (arg0).
735 * Each IO Pdir entry consists of 8 bytes as shown below
736 * (LSB == bit 0):
737 *
738 * 63 40 11 7 0
739 * +-+---------------------+----------------------------------+----+--------+
740 * |V| U | PPN[39:12] | U | FF |
741 * +-+---------------------+----------------------------------+----+--------+
742 *
743 * V == Valid Bit
744 * U == Unused
745 * PPN == Physical Page Number
746 *
747 * The physical address fields are filled with the results of virt_to_phys()
748 * on the vba.
749 */
750
751#if 1
752#define sba_io_pdir_entry(pdir_ptr, vba) *pdir_ptr = ((vba & ~0xE000000000000FFFULL) \
753 | 0x8000000000000000ULL)
754#else
755void SBA_INLINE
756sba_io_pdir_entry(u64 *pdir_ptr, unsigned long vba)
757{
758 *pdir_ptr = ((vba & ~0xE000000000000FFFULL) | 0x80000000000000FFULL);
759}
760#endif
761
762#ifdef ENABLE_MARK_CLEAN
763/**
764 * Since DMA is i-cache coherent, any (complete) pages that were written via
765 * DMA can be marked as "clean" so that lazy_mmu_prot_update() doesn't have to
766 * flush them when they get mapped into an executable vm-area.
767 */
768static void
769mark_clean (void *addr, size_t size)
770{
771 unsigned long pg_addr, end;
772
773 pg_addr = PAGE_ALIGN((unsigned long) addr);
774 end = (unsigned long) addr + size;
775 while (pg_addr + PAGE_SIZE <= end) {
776 struct page *page = virt_to_page((void *)pg_addr);
777 set_bit(PG_arch_1, &page->flags);
778 pg_addr += PAGE_SIZE;
779 }
780}
781#endif
782
783/**
784 * sba_mark_invalid - invalidate one or more IO PDIR entries
785 * @ioc: IO MMU structure which owns the pdir we are interested in.
786 * @iova: IO Virtual Address mapped earlier
787 * @byte_cnt: number of bytes this mapping covers.
788 *
789 * Marking the IO PDIR entry(ies) as Invalid and invalidate
790 * corresponding IO TLB entry. The PCOM (Purge Command Register)
791 * is to purge stale entries in the IO TLB when unmapping entries.
792 *
793 * The PCOM register supports purging of multiple pages, with a minium
794 * of 1 page and a maximum of 2GB. Hardware requires the address be
795 * aligned to the size of the range being purged. The size of the range
796 * must be a power of 2. The "Cool perf optimization" in the
797 * allocation routine helps keep that true.
798 */
799static SBA_INLINE void
800sba_mark_invalid(struct ioc *ioc, dma_addr_t iova, size_t byte_cnt)
801{
802 u32 iovp = (u32) SBA_IOVP(ioc,iova);
803
804 int off = PDIR_INDEX(iovp);
805
806 /* Must be non-zero and rounded up */
807 ASSERT(byte_cnt > 0);
808 ASSERT(0 == (byte_cnt & ~iovp_mask));
809
810#ifdef ASSERT_PDIR_SANITY
811 /* Assert first pdir entry is set */
812 if (!(ioc->pdir_base[off] >> 60)) {
813 sba_dump_pdir_entry(ioc,"sba_mark_invalid()", PDIR_INDEX(iovp));
814 }
815#endif
816
817 if (byte_cnt <= iovp_size)
818 {
819 ASSERT(off < ioc->pdir_size);
820
821 iovp |= iovp_shift; /* set "size" field for PCOM */
822
823#ifndef FULL_VALID_PDIR
824 /*
825 ** clear I/O PDIR entry "valid" bit
826 ** Do NOT clear the rest - save it for debugging.
827 ** We should only clear bits that have previously
828 ** been enabled.
829 */
830 ioc->pdir_base[off] &= ~(0x80000000000000FFULL);
831#else
832 /*
833 ** If we want to maintain the PDIR as valid, put in
834 ** the spill page so devices prefetching won't
835 ** cause a hard fail.
836 */
837 ioc->pdir_base[off] = (0x80000000000000FFULL | prefetch_spill_page);
838#endif
839 } else {
840 u32 t = get_iovp_order(byte_cnt) + iovp_shift;
841
842 iovp |= t;
843 ASSERT(t <= 31); /* 2GB! Max value of "size" field */
844
845 do {
846 /* verify this pdir entry is enabled */
847 ASSERT(ioc->pdir_base[off] >> 63);
848#ifndef FULL_VALID_PDIR
849 /* clear I/O Pdir entry "valid" bit first */
850 ioc->pdir_base[off] &= ~(0x80000000000000FFULL);
851#else
852 ioc->pdir_base[off] = (0x80000000000000FFULL | prefetch_spill_page);
853#endif
854 off++;
855 byte_cnt -= iovp_size;
856 } while (byte_cnt > 0);
857 }
858
859 WRITE_REG(iovp | ioc->ibase, ioc->ioc_hpa+IOC_PCOM);
860}
861
862/**
863 * sba_map_single - map one buffer and return IOVA for DMA
864 * @dev: instance of PCI owned by the driver that's asking.
865 * @addr: driver buffer to map.
866 * @size: number of bytes to map in driver buffer.
867 * @dir: R/W or both.
868 *
869 * See Documentation/DMA-mapping.txt
870 */
871dma_addr_t
872sba_map_single(struct device *dev, void *addr, size_t size, int dir)
873{
874 struct ioc *ioc;
875 dma_addr_t iovp;
876 dma_addr_t offset;
877 u64 *pdir_start;
878 int pide;
879#ifdef ASSERT_PDIR_SANITY
880 unsigned long flags;
881#endif
882#ifdef ALLOW_IOV_BYPASS
883 unsigned long pci_addr = virt_to_phys(addr);
884#endif
885
886#ifdef ALLOW_IOV_BYPASS
887 ASSERT(to_pci_dev(dev)->dma_mask);
888 /*
889 ** Check if the PCI device can DMA to ptr... if so, just return ptr
890 */
891 if (likely((pci_addr & ~to_pci_dev(dev)->dma_mask) == 0)) {
892 /*
893 ** Device is bit capable of DMA'ing to the buffer...
894 ** just return the PCI address of ptr
895 */
896 DBG_BYPASS("sba_map_single() bypass mask/addr: 0x%lx/0x%lx\n",
897 to_pci_dev(dev)->dma_mask, pci_addr);
898 return pci_addr;
899 }
900#endif
901 ioc = GET_IOC(dev);
902 ASSERT(ioc);
903
904 prefetch(ioc->res_hint);
905
906 ASSERT(size > 0);
907 ASSERT(size <= DMA_CHUNK_SIZE);
908
909 /* save offset bits */
910 offset = ((dma_addr_t) (long) addr) & ~iovp_mask;
911
912 /* round up to nearest iovp_size */
913 size = (size + offset + ~iovp_mask) & iovp_mask;
914
915#ifdef ASSERT_PDIR_SANITY
916 spin_lock_irqsave(&ioc->res_lock, flags);
917 if (sba_check_pdir(ioc,"Check before sba_map_single()"))
918 panic("Sanity check failed");
919 spin_unlock_irqrestore(&ioc->res_lock, flags);
920#endif
921
922 pide = sba_alloc_range(ioc, size);
923
924 iovp = (dma_addr_t) pide << iovp_shift;
925
926 DBG_RUN("%s() 0x%p -> 0x%lx\n",
927 __FUNCTION__, addr, (long) iovp | offset);
928
929 pdir_start = &(ioc->pdir_base[pide]);
930
931 while (size > 0) {
932 ASSERT(((u8 *)pdir_start)[7] == 0); /* verify availability */
933 sba_io_pdir_entry(pdir_start, (unsigned long) addr);
934
935 DBG_RUN(" pdir 0x%p %lx\n", pdir_start, *pdir_start);
936
937 addr += iovp_size;
938 size -= iovp_size;
939 pdir_start++;
940 }
941 /* force pdir update */
942 wmb();
943
944 /* form complete address */
945#ifdef ASSERT_PDIR_SANITY
946 spin_lock_irqsave(&ioc->res_lock, flags);
947 sba_check_pdir(ioc,"Check after sba_map_single()");
948 spin_unlock_irqrestore(&ioc->res_lock, flags);
949#endif
950 return SBA_IOVA(ioc, iovp, offset);
951}
952
953/**
954 * sba_unmap_single - unmap one IOVA and free resources
955 * @dev: instance of PCI owned by the driver that's asking.
956 * @iova: IOVA of driver buffer previously mapped.
957 * @size: number of bytes mapped in driver buffer.
958 * @dir: R/W or both.
959 *
960 * See Documentation/DMA-mapping.txt
961 */
962void sba_unmap_single(struct device *dev, dma_addr_t iova, size_t size, int dir)
963{
964 struct ioc *ioc;
965#if DELAYED_RESOURCE_CNT > 0
966 struct sba_dma_pair *d;
967#endif
968 unsigned long flags;
969 dma_addr_t offset;
970
971 ioc = GET_IOC(dev);
972 ASSERT(ioc);
973
974#ifdef ALLOW_IOV_BYPASS
975 if (likely((iova & ioc->imask) != ioc->ibase)) {
976 /*
977 ** Address does not fall w/in IOVA, must be bypassing
978 */
979 DBG_BYPASS("sba_unmap_single() bypass addr: 0x%lx\n", iova);
980
981#ifdef ENABLE_MARK_CLEAN
982 if (dir == DMA_FROM_DEVICE) {
983 mark_clean(phys_to_virt(iova), size);
984 }
985#endif
986 return;
987 }
988#endif
989 offset = iova & ~iovp_mask;
990
991 DBG_RUN("%s() iovp 0x%lx/%x\n",
992 __FUNCTION__, (long) iova, size);
993
994 iova ^= offset; /* clear offset bits */
995 size += offset;
996 size = ROUNDUP(size, iovp_size);
997
998
999#if DELAYED_RESOURCE_CNT > 0
1000 spin_lock_irqsave(&ioc->saved_lock, flags);
1001 d = &(ioc->saved[ioc->saved_cnt]);
1002 d->iova = iova;
1003 d->size = size;
1004 if (unlikely(++(ioc->saved_cnt) >= DELAYED_RESOURCE_CNT)) {
1005 int cnt = ioc->saved_cnt;
1006 spin_lock(&ioc->res_lock);
1007 while (cnt--) {
1008 sba_mark_invalid(ioc, d->iova, d->size);
1009 sba_free_range(ioc, d->iova, d->size);
1010 d--;
1011 }
1012 ioc->saved_cnt = 0;
1013 READ_REG(ioc->ioc_hpa+IOC_PCOM); /* flush purges */
1014 spin_unlock(&ioc->res_lock);
1015 }
1016 spin_unlock_irqrestore(&ioc->saved_lock, flags);
1017#else /* DELAYED_RESOURCE_CNT == 0 */
1018 spin_lock_irqsave(&ioc->res_lock, flags);
1019 sba_mark_invalid(ioc, iova, size);
1020 sba_free_range(ioc, iova, size);
1021 READ_REG(ioc->ioc_hpa+IOC_PCOM); /* flush purges */
1022 spin_unlock_irqrestore(&ioc->res_lock, flags);
1023#endif /* DELAYED_RESOURCE_CNT == 0 */
1024#ifdef ENABLE_MARK_CLEAN
1025 if (dir == DMA_FROM_DEVICE) {
1026 u32 iovp = (u32) SBA_IOVP(ioc,iova);
1027 int off = PDIR_INDEX(iovp);
1028 void *addr;
1029
1030 if (size <= iovp_size) {
1031 addr = phys_to_virt(ioc->pdir_base[off] &
1032 ~0xE000000000000FFFULL);
1033 mark_clean(addr, size);
1034 } else {
1035 size_t byte_cnt = size;
1036
1037 do {
1038 addr = phys_to_virt(ioc->pdir_base[off] &
1039 ~0xE000000000000FFFULL);
1040 mark_clean(addr, min(byte_cnt, iovp_size));
1041 off++;
1042 byte_cnt -= iovp_size;
1043
1044 } while (byte_cnt > 0);
1045 }
1046 }
1047#endif
1048}
1049
1050
1051/**
1052 * sba_alloc_coherent - allocate/map shared mem for DMA
1053 * @dev: instance of PCI owned by the driver that's asking.
1054 * @size: number of bytes mapped in driver buffer.
1055 * @dma_handle: IOVA of new buffer.
1056 *
1057 * See Documentation/DMA-mapping.txt
1058 */
1059void *
1060sba_alloc_coherent (struct device *dev, size_t size, dma_addr_t *dma_handle, int flags)
1061{
1062 struct ioc *ioc;
1063 void *addr;
1064
1065 ioc = GET_IOC(dev);
1066 ASSERT(ioc);
1067
1068#ifdef CONFIG_NUMA
1069 {
1070 struct page *page;
1071 page = alloc_pages_node(ioc->node == MAX_NUMNODES ?
1072 numa_node_id() : ioc->node, flags,
1073 get_order(size));
1074
1075 if (unlikely(!page))
1076 return NULL;
1077
1078 addr = page_address(page);
1079 }
1080#else
1081 addr = (void *) __get_free_pages(flags, get_order(size));
1082#endif
1083 if (unlikely(!addr))
1084 return NULL;
1085
1086 memset(addr, 0, size);
1087 *dma_handle = virt_to_phys(addr);
1088
1089#ifdef ALLOW_IOV_BYPASS
1090 ASSERT(dev->coherent_dma_mask);
1091 /*
1092 ** Check if the PCI device can DMA to ptr... if so, just return ptr
1093 */
1094 if (likely((*dma_handle & ~dev->coherent_dma_mask) == 0)) {
1095 DBG_BYPASS("sba_alloc_coherent() bypass mask/addr: 0x%lx/0x%lx\n",
1096 dev->coherent_dma_mask, *dma_handle);
1097
1098 return addr;
1099 }
1100#endif
1101
1102 /*
1103 * If device can't bypass or bypass is disabled, pass the 32bit fake
1104 * device to map single to get an iova mapping.
1105 */
1106 *dma_handle = sba_map_single(&ioc->sac_only_dev->dev, addr, size, 0);
1107
1108 return addr;
1109}
1110
1111
1112/**
1113 * sba_free_coherent - free/unmap shared mem for DMA
1114 * @dev: instance of PCI owned by the driver that's asking.
1115 * @size: number of bytes mapped in driver buffer.
1116 * @vaddr: virtual address IOVA of "consistent" buffer.
1117 * @dma_handler: IO virtual address of "consistent" buffer.
1118 *
1119 * See Documentation/DMA-mapping.txt
1120 */
1121void sba_free_coherent (struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle)
1122{
1123 sba_unmap_single(dev, dma_handle, size, 0);
1124 free_pages((unsigned long) vaddr, get_order(size));
1125}
1126
1127
1128/*
1129** Since 0 is a valid pdir_base index value, can't use that
1130** to determine if a value is valid or not. Use a flag to indicate
1131** the SG list entry contains a valid pdir index.
1132*/
1133#define PIDE_FLAG 0x1UL
1134
1135#ifdef DEBUG_LARGE_SG_ENTRIES
1136int dump_run_sg = 0;
1137#endif
1138
1139
1140/**
1141 * sba_fill_pdir - write allocated SG entries into IO PDIR
1142 * @ioc: IO MMU structure which owns the pdir we are interested in.
1143 * @startsg: list of IOVA/size pairs
1144 * @nents: number of entries in startsg list
1145 *
1146 * Take preprocessed SG list and write corresponding entries
1147 * in the IO PDIR.
1148 */
1149
1150static SBA_INLINE int
1151sba_fill_pdir(
1152 struct ioc *ioc,
1153 struct scatterlist *startsg,
1154 int nents)
1155{
1156 struct scatterlist *dma_sg = startsg; /* pointer to current DMA */
1157 int n_mappings = 0;
1158 u64 *pdirp = NULL;
1159 unsigned long dma_offset = 0;
1160
1161 dma_sg--;
1162 while (nents-- > 0) {
1163 int cnt = startsg->dma_length;
1164 startsg->dma_length = 0;
1165
1166#ifdef DEBUG_LARGE_SG_ENTRIES
1167 if (dump_run_sg)
1168 printk(" %2d : %08lx/%05x %p\n",
1169 nents, startsg->dma_address, cnt,
1170 sba_sg_address(startsg));
1171#else
1172 DBG_RUN_SG(" %d : %08lx/%05x %p\n",
1173 nents, startsg->dma_address, cnt,
1174 sba_sg_address(startsg));
1175#endif
1176 /*
1177 ** Look for the start of a new DMA stream
1178 */
1179 if (startsg->dma_address & PIDE_FLAG) {
1180 u32 pide = startsg->dma_address & ~PIDE_FLAG;
1181 dma_offset = (unsigned long) pide & ~iovp_mask;
1182 startsg->dma_address = 0;
1183 dma_sg++;
1184 dma_sg->dma_address = pide | ioc->ibase;
1185 pdirp = &(ioc->pdir_base[pide >> iovp_shift]);
1186 n_mappings++;
1187 }
1188
1189 /*
1190 ** Look for a VCONTIG chunk
1191 */
1192 if (cnt) {
1193 unsigned long vaddr = (unsigned long) sba_sg_address(startsg);
1194 ASSERT(pdirp);
1195
1196 /* Since multiple Vcontig blocks could make up
1197 ** one DMA stream, *add* cnt to dma_len.
1198 */
1199 dma_sg->dma_length += cnt;
1200 cnt += dma_offset;
1201 dma_offset=0; /* only want offset on first chunk */
1202 cnt = ROUNDUP(cnt, iovp_size);
1203 do {
1204 sba_io_pdir_entry(pdirp, vaddr);
1205 vaddr += iovp_size;
1206 cnt -= iovp_size;
1207 pdirp++;
1208 } while (cnt > 0);
1209 }
1210 startsg++;
1211 }
1212 /* force pdir update */
1213 wmb();
1214
1215#ifdef DEBUG_LARGE_SG_ENTRIES
1216 dump_run_sg = 0;
1217#endif
1218 return(n_mappings);
1219}
1220
1221
1222/*
1223** Two address ranges are DMA contiguous *iff* "end of prev" and
1224** "start of next" are both on an IOV page boundary.
1225**
1226** (shift left is a quick trick to mask off upper bits)
1227*/
1228#define DMA_CONTIG(__X, __Y) \
1229 (((((unsigned long) __X) | ((unsigned long) __Y)) << (BITS_PER_LONG - iovp_shift)) == 0UL)
1230
1231
1232/**
1233 * sba_coalesce_chunks - preprocess the SG list
1234 * @ioc: IO MMU structure which owns the pdir we are interested in.
1235 * @startsg: list of IOVA/size pairs
1236 * @nents: number of entries in startsg list
1237 *
1238 * First pass is to walk the SG list and determine where the breaks are
1239 * in the DMA stream. Allocates PDIR entries but does not fill them.
1240 * Returns the number of DMA chunks.
1241 *
1242 * Doing the fill separate from the coalescing/allocation keeps the
1243 * code simpler. Future enhancement could make one pass through
1244 * the sglist do both.
1245 */
1246static SBA_INLINE int
1247sba_coalesce_chunks( struct ioc *ioc,
1248 struct scatterlist *startsg,
1249 int nents)
1250{
1251 struct scatterlist *vcontig_sg; /* VCONTIG chunk head */
1252 unsigned long vcontig_len; /* len of VCONTIG chunk */
1253 unsigned long vcontig_end;
1254 struct scatterlist *dma_sg; /* next DMA stream head */
1255 unsigned long dma_offset, dma_len; /* start/len of DMA stream */
1256 int n_mappings = 0;
1257
1258 while (nents > 0) {
1259 unsigned long vaddr = (unsigned long) sba_sg_address(startsg);
1260
1261 /*
1262 ** Prepare for first/next DMA stream
1263 */
1264 dma_sg = vcontig_sg = startsg;
1265 dma_len = vcontig_len = vcontig_end = startsg->length;
1266 vcontig_end += vaddr;
1267 dma_offset = vaddr & ~iovp_mask;
1268
1269 /* PARANOID: clear entries */
1270 startsg->dma_address = startsg->dma_length = 0;
1271
1272 /*
1273 ** This loop terminates one iteration "early" since
1274 ** it's always looking one "ahead".
1275 */
1276 while (--nents > 0) {
1277 unsigned long vaddr; /* tmp */
1278
1279 startsg++;
1280
1281 /* PARANOID */
1282 startsg->dma_address = startsg->dma_length = 0;
1283
1284 /* catch brokenness in SCSI layer */
1285 ASSERT(startsg->length <= DMA_CHUNK_SIZE);
1286
1287 /*
1288 ** First make sure current dma stream won't
1289 ** exceed DMA_CHUNK_SIZE if we coalesce the
1290 ** next entry.
1291 */
1292 if (((dma_len + dma_offset + startsg->length + ~iovp_mask) & iovp_mask)
1293 > DMA_CHUNK_SIZE)
1294 break;
1295
1296 /*
1297 ** Then look for virtually contiguous blocks.
1298 **
1299 ** append the next transaction?
1300 */
1301 vaddr = (unsigned long) sba_sg_address(startsg);
1302 if (vcontig_end == vaddr)
1303 {
1304 vcontig_len += startsg->length;
1305 vcontig_end += startsg->length;
1306 dma_len += startsg->length;
1307 continue;
1308 }
1309
1310#ifdef DEBUG_LARGE_SG_ENTRIES
1311 dump_run_sg = (vcontig_len > iovp_size);
1312#endif
1313
1314 /*
1315 ** Not virtually contigous.
1316 ** Terminate prev chunk.
1317 ** Start a new chunk.
1318 **
1319 ** Once we start a new VCONTIG chunk, dma_offset
1320 ** can't change. And we need the offset from the first
1321 ** chunk - not the last one. Ergo Successive chunks
1322 ** must start on page boundaries and dove tail
1323 ** with it's predecessor.
1324 */
1325 vcontig_sg->dma_length = vcontig_len;
1326
1327 vcontig_sg = startsg;
1328 vcontig_len = startsg->length;
1329
1330 /*
1331 ** 3) do the entries end/start on page boundaries?
1332 ** Don't update vcontig_end until we've checked.
1333 */
1334 if (DMA_CONTIG(vcontig_end, vaddr))
1335 {
1336 vcontig_end = vcontig_len + vaddr;
1337 dma_len += vcontig_len;
1338 continue;
1339 } else {
1340 break;
1341 }
1342 }
1343
1344 /*
1345 ** End of DMA Stream
1346 ** Terminate last VCONTIG block.
1347 ** Allocate space for DMA stream.
1348 */
1349 vcontig_sg->dma_length = vcontig_len;
1350 dma_len = (dma_len + dma_offset + ~iovp_mask) & iovp_mask;
1351 ASSERT(dma_len <= DMA_CHUNK_SIZE);
1352 dma_sg->dma_address = (dma_addr_t) (PIDE_FLAG
1353 | (sba_alloc_range(ioc, dma_len) << iovp_shift)
1354 | dma_offset);
1355 n_mappings++;
1356 }
1357
1358 return n_mappings;
1359}
1360
1361
1362/**
1363 * sba_map_sg - map Scatter/Gather list
1364 * @dev: instance of PCI owned by the driver that's asking.
1365 * @sglist: array of buffer/length pairs
1366 * @nents: number of entries in list
1367 * @dir: R/W or both.
1368 *
1369 * See Documentation/DMA-mapping.txt
1370 */
1371int sba_map_sg(struct device *dev, struct scatterlist *sglist, int nents, int dir)
1372{
1373 struct ioc *ioc;
1374 int coalesced, filled = 0;
1375#ifdef ASSERT_PDIR_SANITY
1376 unsigned long flags;
1377#endif
1378#ifdef ALLOW_IOV_BYPASS_SG
1379 struct scatterlist *sg;
1380#endif
1381
1382 DBG_RUN_SG("%s() START %d entries\n", __FUNCTION__, nents);
1383 ioc = GET_IOC(dev);
1384 ASSERT(ioc);
1385
1386#ifdef ALLOW_IOV_BYPASS_SG
1387 ASSERT(to_pci_dev(dev)->dma_mask);
1388 if (likely((ioc->dma_mask & ~to_pci_dev(dev)->dma_mask) == 0)) {
1389 for (sg = sglist ; filled < nents ; filled++, sg++){
1390 sg->dma_length = sg->length;
1391 sg->dma_address = virt_to_phys(sba_sg_address(sg));
1392 }
1393 return filled;
1394 }
1395#endif
1396 /* Fast path single entry scatterlists. */
1397 if (nents == 1) {
1398 sglist->dma_length = sglist->length;
1399 sglist->dma_address = sba_map_single(dev, sba_sg_address(sglist), sglist->length, dir);
1400 return 1;
1401 }
1402
1403#ifdef ASSERT_PDIR_SANITY
1404 spin_lock_irqsave(&ioc->res_lock, flags);
1405 if (sba_check_pdir(ioc,"Check before sba_map_sg()"))
1406 {
1407 sba_dump_sg(ioc, sglist, nents);
1408 panic("Check before sba_map_sg()");
1409 }
1410 spin_unlock_irqrestore(&ioc->res_lock, flags);
1411#endif
1412
1413 prefetch(ioc->res_hint);
1414
1415 /*
1416 ** First coalesce the chunks and allocate I/O pdir space
1417 **
1418 ** If this is one DMA stream, we can properly map using the
1419 ** correct virtual address associated with each DMA page.
1420 ** w/o this association, we wouldn't have coherent DMA!
1421 ** Access to the virtual address is what forces a two pass algorithm.
1422 */
1423 coalesced = sba_coalesce_chunks(ioc, sglist, nents);
1424
1425 /*
1426 ** Program the I/O Pdir
1427 **
1428 ** map the virtual addresses to the I/O Pdir
1429 ** o dma_address will contain the pdir index
1430 ** o dma_len will contain the number of bytes to map
1431 ** o address contains the virtual address.
1432 */
1433 filled = sba_fill_pdir(ioc, sglist, nents);
1434
1435#ifdef ASSERT_PDIR_SANITY
1436 spin_lock_irqsave(&ioc->res_lock, flags);
1437 if (sba_check_pdir(ioc,"Check after sba_map_sg()"))
1438 {
1439 sba_dump_sg(ioc, sglist, nents);
1440 panic("Check after sba_map_sg()\n");
1441 }
1442 spin_unlock_irqrestore(&ioc->res_lock, flags);
1443#endif
1444
1445 ASSERT(coalesced == filled);
1446 DBG_RUN_SG("%s() DONE %d mappings\n", __FUNCTION__, filled);
1447
1448 return filled;
1449}
1450
1451
1452/**
1453 * sba_unmap_sg - unmap Scatter/Gather list
1454 * @dev: instance of PCI owned by the driver that's asking.
1455 * @sglist: array of buffer/length pairs
1456 * @nents: number of entries in list
1457 * @dir: R/W or both.
1458 *
1459 * See Documentation/DMA-mapping.txt
1460 */
1461void sba_unmap_sg (struct device *dev, struct scatterlist *sglist, int nents, int dir)
1462{
1463#ifdef ASSERT_PDIR_SANITY
1464 struct ioc *ioc;
1465 unsigned long flags;
1466#endif
1467
1468 DBG_RUN_SG("%s() START %d entries, %p,%x\n",
1469 __FUNCTION__, nents, sba_sg_address(sglist), sglist->length);
1470
1471#ifdef ASSERT_PDIR_SANITY
1472 ioc = GET_IOC(dev);
1473 ASSERT(ioc);
1474
1475 spin_lock_irqsave(&ioc->res_lock, flags);
1476 sba_check_pdir(ioc,"Check before sba_unmap_sg()");
1477 spin_unlock_irqrestore(&ioc->res_lock, flags);
1478#endif
1479
1480 while (nents && sglist->dma_length) {
1481
1482 sba_unmap_single(dev, sglist->dma_address, sglist->dma_length, dir);
1483 sglist++;
1484 nents--;
1485 }
1486
1487 DBG_RUN_SG("%s() DONE (nents %d)\n", __FUNCTION__, nents);
1488
1489#ifdef ASSERT_PDIR_SANITY
1490 spin_lock_irqsave(&ioc->res_lock, flags);
1491 sba_check_pdir(ioc,"Check after sba_unmap_sg()");
1492 spin_unlock_irqrestore(&ioc->res_lock, flags);
1493#endif
1494
1495}
1496
1497/**************************************************************
1498*
1499* Initialization and claim
1500*
1501***************************************************************/
1502
1503static void __init
1504ioc_iova_init(struct ioc *ioc)
1505{
1506 int tcnfg;
1507 int agp_found = 0;
1508 struct pci_dev *device = NULL;
1509#ifdef FULL_VALID_PDIR
1510 unsigned long index;
1511#endif
1512
1513 /*
1514 ** Firmware programs the base and size of a "safe IOVA space"
1515 ** (one that doesn't overlap memory or LMMIO space) in the
1516 ** IBASE and IMASK registers.
1517 */
1518 ioc->ibase = READ_REG(ioc->ioc_hpa + IOC_IBASE) & ~0x1UL;
1519 ioc->imask = READ_REG(ioc->ioc_hpa + IOC_IMASK) | 0xFFFFFFFF00000000UL;
1520
1521 ioc->iov_size = ~ioc->imask + 1;
1522
1523 DBG_INIT("%s() hpa %p IOV base 0x%lx mask 0x%lx (%dMB)\n",
1524 __FUNCTION__, ioc->ioc_hpa, ioc->ibase, ioc->imask,
1525 ioc->iov_size >> 20);
1526
1527 switch (iovp_size) {
1528 case 4*1024: tcnfg = 0; break;
1529 case 8*1024: tcnfg = 1; break;
1530 case 16*1024: tcnfg = 2; break;
1531 case 64*1024: tcnfg = 3; break;
1532 default:
1533 panic(PFX "Unsupported IOTLB page size %ldK",
1534 iovp_size >> 10);
1535 break;
1536 }
1537 WRITE_REG(tcnfg, ioc->ioc_hpa + IOC_TCNFG);
1538
1539 ioc->pdir_size = (ioc->iov_size / iovp_size) * PDIR_ENTRY_SIZE;
1540 ioc->pdir_base = (void *) __get_free_pages(GFP_KERNEL,
1541 get_order(ioc->pdir_size));
1542 if (!ioc->pdir_base)
1543 panic(PFX "Couldn't allocate I/O Page Table\n");
1544
1545 memset(ioc->pdir_base, 0, ioc->pdir_size);
1546
1547 DBG_INIT("%s() IOV page size %ldK pdir %p size %x\n", __FUNCTION__,
1548 iovp_size >> 10, ioc->pdir_base, ioc->pdir_size);
1549
1550 ASSERT(ALIGN((unsigned long) ioc->pdir_base, 4*1024) == (unsigned long) ioc->pdir_base);
1551 WRITE_REG(virt_to_phys(ioc->pdir_base), ioc->ioc_hpa + IOC_PDIR_BASE);
1552
1553 /*
1554 ** If an AGP device is present, only use half of the IOV space
1555 ** for PCI DMA. Unfortunately we can't know ahead of time
1556 ** whether GART support will actually be used, for now we
1557 ** can just key on an AGP device found in the system.
1558 ** We program the next pdir index after we stop w/ a key for
1559 ** the GART code to handshake on.
1560 */
1561 for_each_pci_dev(device)
1562 agp_found |= pci_find_capability(device, PCI_CAP_ID_AGP);
1563
1564 if (agp_found && reserve_sba_gart) {
1565 printk(KERN_INFO PFX "reserving %dMb of IOVA space at 0x%lx for agpgart\n",
1566 ioc->iov_size/2 >> 20, ioc->ibase + ioc->iov_size/2);
1567 ioc->pdir_size /= 2;
1568 ((u64 *)ioc->pdir_base)[PDIR_INDEX(ioc->iov_size/2)] = ZX1_SBA_IOMMU_COOKIE;
1569 }
1570#ifdef FULL_VALID_PDIR
1571 /*
1572 ** Check to see if the spill page has been allocated, we don't need more than
1573 ** one across multiple SBAs.
1574 */
1575 if (!prefetch_spill_page) {
1576 char *spill_poison = "SBAIOMMU POISON";
1577 int poison_size = 16;
1578 void *poison_addr, *addr;
1579
1580 addr = (void *)__get_free_pages(GFP_KERNEL, get_order(iovp_size));
1581 if (!addr)
1582 panic(PFX "Couldn't allocate PDIR spill page\n");
1583
1584 poison_addr = addr;
1585 for ( ; (u64) poison_addr < addr + iovp_size; poison_addr += poison_size)
1586 memcpy(poison_addr, spill_poison, poison_size);
1587
1588 prefetch_spill_page = virt_to_phys(addr);
1589
1590 DBG_INIT("%s() prefetch spill addr: 0x%lx\n", __FUNCTION__, prefetch_spill_page);
1591 }
1592 /*
1593 ** Set all the PDIR entries valid w/ the spill page as the target
1594 */
1595 for (index = 0 ; index < (ioc->pdir_size / PDIR_ENTRY_SIZE) ; index++)
1596 ((u64 *)ioc->pdir_base)[index] = (0x80000000000000FF | prefetch_spill_page);
1597#endif
1598
1599 /* Clear I/O TLB of any possible entries */
1600 WRITE_REG(ioc->ibase | (get_iovp_order(ioc->iov_size) + iovp_shift), ioc->ioc_hpa + IOC_PCOM);
1601 READ_REG(ioc->ioc_hpa + IOC_PCOM);
1602
1603 /* Enable IOVA translation */
1604 WRITE_REG(ioc->ibase | 1, ioc->ioc_hpa + IOC_IBASE);
1605 READ_REG(ioc->ioc_hpa + IOC_IBASE);
1606}
1607
1608static void __init
1609ioc_resource_init(struct ioc *ioc)
1610{
1611 spin_lock_init(&ioc->res_lock);
1612#if DELAYED_RESOURCE_CNT > 0
1613 spin_lock_init(&ioc->saved_lock);
1614#endif
1615
1616 /* resource map size dictated by pdir_size */
1617 ioc->res_size = ioc->pdir_size / PDIR_ENTRY_SIZE; /* entries */
1618 ioc->res_size >>= 3; /* convert bit count to byte count */
1619 DBG_INIT("%s() res_size 0x%x\n", __FUNCTION__, ioc->res_size);
1620
1621 ioc->res_map = (char *) __get_free_pages(GFP_KERNEL,
1622 get_order(ioc->res_size));
1623 if (!ioc->res_map)
1624 panic(PFX "Couldn't allocate resource map\n");
1625
1626 memset(ioc->res_map, 0, ioc->res_size);
1627 /* next available IOVP - circular search */
1628 ioc->res_hint = (unsigned long *) ioc->res_map;
1629
1630#ifdef ASSERT_PDIR_SANITY
1631 /* Mark first bit busy - ie no IOVA 0 */
1632 ioc->res_map[0] = 0x1;
1633 ioc->pdir_base[0] = 0x8000000000000000ULL | ZX1_SBA_IOMMU_COOKIE;
1634#endif
1635#ifdef FULL_VALID_PDIR
1636 /* Mark the last resource used so we don't prefetch beyond IOVA space */
1637 ioc->res_map[ioc->res_size - 1] |= 0x80UL; /* res_map is chars */
1638 ioc->pdir_base[(ioc->pdir_size / PDIR_ENTRY_SIZE) - 1] = (0x80000000000000FF
1639 | prefetch_spill_page);
1640#endif
1641
1642 DBG_INIT("%s() res_map %x %p\n", __FUNCTION__,
1643 ioc->res_size, (void *) ioc->res_map);
1644}
1645
1646static void __init
1647ioc_sac_init(struct ioc *ioc)
1648{
1649 struct pci_dev *sac = NULL;
1650 struct pci_controller *controller = NULL;
1651
1652 /*
1653 * pci_alloc_coherent() must return a DMA address which is
1654 * SAC (single address cycle) addressable, so allocate a
1655 * pseudo-device to enforce that.
1656 */
1657 sac = kmalloc(sizeof(*sac), GFP_KERNEL);
1658 if (!sac)
1659 panic(PFX "Couldn't allocate struct pci_dev");
1660 memset(sac, 0, sizeof(*sac));
1661
1662 controller = kmalloc(sizeof(*controller), GFP_KERNEL);
1663 if (!controller)
1664 panic(PFX "Couldn't allocate struct pci_controller");
1665 memset(controller, 0, sizeof(*controller));
1666
1667 controller->iommu = ioc;
1668 sac->sysdata = controller;
1669 sac->dma_mask = 0xFFFFFFFFUL;
1670#ifdef CONFIG_PCI
1671 sac->dev.bus = &pci_bus_type;
1672#endif
1673 ioc->sac_only_dev = sac;
1674}
1675
1676static void __init
1677ioc_zx1_init(struct ioc *ioc)
1678{
1679 unsigned long rope_config;
1680 unsigned int i;
1681
1682 if (ioc->rev < 0x20)
1683 panic(PFX "IOC 2.0 or later required for IOMMU support\n");
1684
1685 /* 38 bit memory controller + extra bit for range displaced by MMIO */
1686 ioc->dma_mask = (0x1UL << 39) - 1;
1687
1688 /*
1689 ** Clear ROPE(N)_CONFIG AO bit.
1690 ** Disables "NT Ordering" (~= !"Relaxed Ordering")
1691 ** Overrides bit 1 in DMA Hint Sets.
1692 ** Improves netperf UDP_STREAM by ~10% for tg3 on bcm5701.
1693 */
1694 for (i=0; i<(8*8); i+=8) {
1695 rope_config = READ_REG(ioc->ioc_hpa + IOC_ROPE0_CFG + i);
1696 rope_config &= ~IOC_ROPE_AO;
1697 WRITE_REG(rope_config, ioc->ioc_hpa + IOC_ROPE0_CFG + i);
1698 }
1699}
1700
1701typedef void (initfunc)(struct ioc *);
1702
1703struct ioc_iommu {
1704 u32 func_id;
1705 char *name;
1706 initfunc *init;
1707};
1708
1709static struct ioc_iommu ioc_iommu_info[] __initdata = {
1710 { ZX1_IOC_ID, "zx1", ioc_zx1_init },
1711 { ZX2_IOC_ID, "zx2", NULL },
1712 { SX1000_IOC_ID, "sx1000", NULL },
1713};
1714
1715static struct ioc * __init
1716ioc_init(u64 hpa, void *handle)
1717{
1718 struct ioc *ioc;
1719 struct ioc_iommu *info;
1720
1721 ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
1722 if (!ioc)
1723 return NULL;
1724
1725 memset(ioc, 0, sizeof(*ioc));
1726
1727 ioc->next = ioc_list;
1728 ioc_list = ioc;
1729
1730 ioc->handle = handle;
1731 ioc->ioc_hpa = ioremap(hpa, 0x1000);
1732
1733 ioc->func_id = READ_REG(ioc->ioc_hpa + IOC_FUNC_ID);
1734 ioc->rev = READ_REG(ioc->ioc_hpa + IOC_FCLASS) & 0xFFUL;
1735 ioc->dma_mask = 0xFFFFFFFFFFFFFFFFUL; /* conservative */
1736
1737 for (info = ioc_iommu_info; info < ioc_iommu_info + ARRAY_SIZE(ioc_iommu_info); info++) {
1738 if (ioc->func_id == info->func_id) {
1739 ioc->name = info->name;
1740 if (info->init)
1741 (info->init)(ioc);
1742 }
1743 }
1744
1745 iovp_size = (1 << iovp_shift);
1746 iovp_mask = ~(iovp_size - 1);
1747
1748 DBG_INIT("%s: PAGE_SIZE %ldK, iovp_size %ldK\n", __FUNCTION__,
1749 PAGE_SIZE >> 10, iovp_size >> 10);
1750
1751 if (!ioc->name) {
1752 ioc->name = kmalloc(24, GFP_KERNEL);
1753 if (ioc->name)
1754 sprintf((char *) ioc->name, "Unknown (%04x:%04x)",
1755 ioc->func_id & 0xFFFF, (ioc->func_id >> 16) & 0xFFFF);
1756 else
1757 ioc->name = "Unknown";
1758 }
1759
1760 ioc_iova_init(ioc);
1761 ioc_resource_init(ioc);
1762 ioc_sac_init(ioc);
1763
1764 if ((long) ~iovp_mask > (long) ia64_max_iommu_merge_mask)
1765 ia64_max_iommu_merge_mask = ~iovp_mask;
1766
1767 printk(KERN_INFO PFX
1768 "%s %d.%d HPA 0x%lx IOVA space %dMb at 0x%lx\n",
1769 ioc->name, (ioc->rev >> 4) & 0xF, ioc->rev & 0xF,
1770 hpa, ioc->iov_size >> 20, ioc->ibase);
1771
1772 return ioc;
1773}
1774
1775
1776
1777/**************************************************************************
1778**
1779** SBA initialization code (HW and SW)
1780**
1781** o identify SBA chip itself
1782** o FIXME: initialize DMA hints for reasonable defaults
1783**
1784**************************************************************************/
1785
1786#ifdef CONFIG_PROC_FS
1787static void *
1788ioc_start(struct seq_file *s, loff_t *pos)
1789{
1790 struct ioc *ioc;
1791 loff_t n = *pos;
1792
1793 for (ioc = ioc_list; ioc; ioc = ioc->next)
1794 if (!n--)
1795 return ioc;
1796
1797 return NULL;
1798}
1799
1800static void *
1801ioc_next(struct seq_file *s, void *v, loff_t *pos)
1802{
1803 struct ioc *ioc = v;
1804
1805 ++*pos;
1806 return ioc->next;
1807}
1808
1809static void
1810ioc_stop(struct seq_file *s, void *v)
1811{
1812}
1813
1814static int
1815ioc_show(struct seq_file *s, void *v)
1816{
1817 struct ioc *ioc = v;
1818 unsigned long *res_ptr = (unsigned long *)ioc->res_map;
1819 int i, used = 0;
1820
1821 seq_printf(s, "Hewlett Packard %s IOC rev %d.%d\n",
1822 ioc->name, ((ioc->rev >> 4) & 0xF), (ioc->rev & 0xF));
1823#ifdef CONFIG_NUMA
1824 if (ioc->node != MAX_NUMNODES)
1825 seq_printf(s, "NUMA node : %d\n", ioc->node);
1826#endif
1827 seq_printf(s, "IOVA size : %ld MB\n", ((ioc->pdir_size >> 3) * iovp_size)/(1024*1024));
1828 seq_printf(s, "IOVA page size : %ld kb\n", iovp_size/1024);
1829
1830 for (i = 0; i < (ioc->res_size / sizeof(unsigned long)); ++i, ++res_ptr)
1831 used += hweight64(*res_ptr);
1832
1833 seq_printf(s, "PDIR size : %d entries\n", ioc->pdir_size >> 3);
1834 seq_printf(s, "PDIR used : %d entries\n", used);
1835
1836#ifdef PDIR_SEARCH_TIMING
1837 {
1838 unsigned long i = 0, avg = 0, min, max;
1839 min = max = ioc->avg_search[0];
1840 for (i = 0; i < SBA_SEARCH_SAMPLE; i++) {
1841 avg += ioc->avg_search[i];
1842 if (ioc->avg_search[i] > max) max = ioc->avg_search[i];
1843 if (ioc->avg_search[i] < min) min = ioc->avg_search[i];
1844 }
1845 avg /= SBA_SEARCH_SAMPLE;
1846 seq_printf(s, "Bitmap search : %ld/%ld/%ld (min/avg/max CPU Cycles/IOVA page)\n",
1847 min, avg, max);
1848 }
1849#endif
1850#ifndef ALLOW_IOV_BYPASS
1851 seq_printf(s, "IOVA bypass disabled\n");
1852#endif
1853 return 0;
1854}
1855
1856static struct seq_operations ioc_seq_ops = {
1857 .start = ioc_start,
1858 .next = ioc_next,
1859 .stop = ioc_stop,
1860 .show = ioc_show
1861};
1862
1863static int
1864ioc_open(struct inode *inode, struct file *file)
1865{
1866 return seq_open(file, &ioc_seq_ops);
1867}
1868
1869static struct file_operations ioc_fops = {
1870 .open = ioc_open,
1871 .read = seq_read,
1872 .llseek = seq_lseek,
1873 .release = seq_release
1874};
1875
1876static void __init
1877ioc_proc_init(void)
1878{
1879 struct proc_dir_entry *dir, *entry;
1880
1881 dir = proc_mkdir("bus/mckinley", NULL);
1882 if (!dir)
1883 return;
1884
1885 entry = create_proc_entry(ioc_list->name, 0, dir);
1886 if (entry)
1887 entry->proc_fops = &ioc_fops;
1888}
1889#endif
1890
1891static void
1892sba_connect_bus(struct pci_bus *bus)
1893{
1894 acpi_handle handle, parent;
1895 acpi_status status;
1896 struct ioc *ioc;
1897
1898 if (!PCI_CONTROLLER(bus))
1899 panic(PFX "no sysdata on bus %d!\n", bus->number);
1900
1901 if (PCI_CONTROLLER(bus)->iommu)
1902 return;
1903
1904 handle = PCI_CONTROLLER(bus)->acpi_handle;
1905 if (!handle)
1906 return;
1907
1908 /*
1909 * The IOC scope encloses PCI root bridges in the ACPI
1910 * namespace, so work our way out until we find an IOC we
1911 * claimed previously.
1912 */
1913 do {
1914 for (ioc = ioc_list; ioc; ioc = ioc->next)
1915 if (ioc->handle == handle) {
1916 PCI_CONTROLLER(bus)->iommu = ioc;
1917 return;
1918 }
1919
1920 status = acpi_get_parent(handle, &parent);
1921 handle = parent;
1922 } while (ACPI_SUCCESS(status));
1923
1924 printk(KERN_WARNING "No IOC for PCI Bus %04x:%02x in ACPI\n", pci_domain_nr(bus), bus->number);
1925}
1926
1927#ifdef CONFIG_NUMA
1928static void __init
1929sba_map_ioc_to_node(struct ioc *ioc, acpi_handle handle)
1930{
1931 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
1932 union acpi_object *obj;
1933 acpi_handle phandle;
1934 unsigned int node;
1935
1936 ioc->node = MAX_NUMNODES;
1937
1938 /*
1939 * Check for a _PXM on this node first. We don't typically see
1940 * one here, so we'll end up getting it from the parent.
1941 */
1942 if (ACPI_FAILURE(acpi_evaluate_object(handle, "_PXM", NULL, &buffer))) {
1943 if (ACPI_FAILURE(acpi_get_parent(handle, &phandle)))
1944 return;
1945
1946 /* Reset the acpi buffer */
1947 buffer.length = ACPI_ALLOCATE_BUFFER;
1948 buffer.pointer = NULL;
1949
1950 if (ACPI_FAILURE(acpi_evaluate_object(phandle, "_PXM", NULL,
1951 &buffer)))
1952 return;
1953 }
1954
1955 if (!buffer.length || !buffer.pointer)
1956 return;
1957
1958 obj = buffer.pointer;
1959
1960 if (obj->type != ACPI_TYPE_INTEGER ||
1961 obj->integer.value >= MAX_PXM_DOMAINS) {
1962 acpi_os_free(buffer.pointer);
1963 return;
1964 }
1965
1966 node = pxm_to_nid_map[obj->integer.value];
1967 acpi_os_free(buffer.pointer);
1968
1969 if (node >= MAX_NUMNODES || !node_online(node))
1970 return;
1971
1972 ioc->node = node;
1973 return;
1974}
1975#else
1976#define sba_map_ioc_to_node(ioc, handle)
1977#endif
1978
1979static int __init
1980acpi_sba_ioc_add(struct acpi_device *device)
1981{
1982 struct ioc *ioc;
1983 acpi_status status;
1984 u64 hpa, length;
1985 struct acpi_buffer buffer;
1986 struct acpi_device_info *dev_info;
1987
1988 status = hp_acpi_csr_space(device->handle, &hpa, &length);
1989 if (ACPI_FAILURE(status))
1990 return 1;
1991
1992 buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
1993 status = acpi_get_object_info(device->handle, &buffer);
1994 if (ACPI_FAILURE(status))
1995 return 1;
1996 dev_info = buffer.pointer;
1997
1998 /*
1999 * For HWP0001, only SBA appears in ACPI namespace. It encloses the PCI
2000 * root bridges, and its CSR space includes the IOC function.
2001 */
2002 if (strncmp("HWP0001", dev_info->hardware_id.value, 7) == 0) {
2003 hpa += ZX1_IOC_OFFSET;
2004 /* zx1 based systems default to kernel page size iommu pages */
2005 if (!iovp_shift)
2006 iovp_shift = min(PAGE_SHIFT, 16);
2007 }
2008 ACPI_MEM_FREE(dev_info);
2009
2010 /*
2011 * default anything not caught above or specified on cmdline to 4k
2012 * iommu page size
2013 */
2014 if (!iovp_shift)
2015 iovp_shift = 12;
2016
2017 ioc = ioc_init(hpa, device->handle);
2018 if (!ioc)
2019 return 1;
2020
2021 /* setup NUMA node association */
2022 sba_map_ioc_to_node(ioc, device->handle);
2023 return 0;
2024}
2025
2026static struct acpi_driver acpi_sba_ioc_driver = {
2027 .name = "IOC IOMMU Driver",
2028 .ids = "HWP0001,HWP0004",
2029 .ops = {
2030 .add = acpi_sba_ioc_add,
2031 },
2032};
2033
2034static int __init
2035sba_init(void)
2036{
2037 acpi_bus_register_driver(&acpi_sba_ioc_driver);
2038 if (!ioc_list)
2039 return 0;
2040
2041#ifdef CONFIG_PCI
2042 {
2043 struct pci_bus *b = NULL;
2044 while ((b = pci_find_next_bus(b)) != NULL)
2045 sba_connect_bus(b);
2046 }
2047#endif
2048
2049#ifdef CONFIG_PROC_FS
2050 ioc_proc_init();
2051#endif
2052 return 0;
2053}
2054
2055subsys_initcall(sba_init); /* must be initialized after ACPI etc., but before any drivers... */
2056
2057extern void dig_setup(char**);
2058/*
2059 * MAX_DMA_ADDRESS needs to be setup prior to paging_init to do any good,
2060 * so we use the platform_setup hook to fix it up.
2061 */
2062void __init
2063sba_setup(char **cmdline_p)
2064{
2065 MAX_DMA_ADDRESS = ~0UL;
2066 dig_setup(cmdline_p);
2067}
2068
2069static int __init
2070nosbagart(char *str)
2071{
2072 reserve_sba_gart = 0;
2073 return 1;
2074}
2075
2076int
2077sba_dma_supported (struct device *dev, u64 mask)
2078{
2079 /* make sure it's at least 32bit capable */
2080 return ((mask & 0xFFFFFFFFUL) == 0xFFFFFFFFUL);
2081}
2082
2083int
2084sba_dma_mapping_error (dma_addr_t dma_addr)
2085{
2086 return 0;
2087}
2088
2089__setup("nosbagart", nosbagart);
2090
2091static int __init
2092sba_page_override(char *str)
2093{
2094 unsigned long page_size;
2095
2096 page_size = memparse(str, &str);
2097 switch (page_size) {
2098 case 4096:
2099 case 8192:
2100 case 16384:
2101 case 65536:
2102 iovp_shift = ffs(page_size) - 1;
2103 break;
2104 default:
2105 printk("%s: unknown/unsupported iommu page size %ld\n",
2106 __FUNCTION__, page_size);
2107 }
2108
2109 return 1;
2110}
2111
2112__setup("sbapagesize=",sba_page_override);
2113
2114EXPORT_SYMBOL(sba_dma_mapping_error);
2115EXPORT_SYMBOL(sba_map_single);
2116EXPORT_SYMBOL(sba_unmap_single);
2117EXPORT_SYMBOL(sba_map_sg);
2118EXPORT_SYMBOL(sba_unmap_sg);
2119EXPORT_SYMBOL(sba_dma_supported);
2120EXPORT_SYMBOL(sba_alloc_coherent);
2121EXPORT_SYMBOL(sba_free_coherent);
diff --git a/arch/ia64/hp/sim/Kconfig b/arch/ia64/hp/sim/Kconfig
new file mode 100644
index 000000000000..18ccb1266e18
--- /dev/null
+++ b/arch/ia64/hp/sim/Kconfig
@@ -0,0 +1,20 @@
1
2menu "HP Simulator drivers"
3 depends on IA64_HP_SIM || IA64_GENERIC
4
5config HP_SIMETH
6 bool "Simulated Ethernet "
7
8config HP_SIMSERIAL
9 bool "Simulated serial driver support"
10
11config HP_SIMSERIAL_CONSOLE
12 bool "Console for HP simulator"
13 depends on HP_SIMSERIAL
14
15config HP_SIMSCSI
16 tristate "Simulated SCSI disk"
17 depends on SCSI
18
19endmenu
20
diff --git a/arch/ia64/hp/sim/Makefile b/arch/ia64/hp/sim/Makefile
new file mode 100644
index 000000000000..d10da47931d7
--- /dev/null
+++ b/arch/ia64/hp/sim/Makefile
@@ -0,0 +1,16 @@
1#
2# ia64/platform/hp/sim/Makefile
3#
4# Copyright (C) 2002 Hewlett-Packard Co.
5# David Mosberger-Tang <davidm@hpl.hp.com>
6# Copyright (C) 1999 Silicon Graphics, Inc.
7# Copyright (C) Srinivasa Thirumalachar (sprasad@engr.sgi.com)
8#
9
10obj-y := hpsim_irq.o hpsim_setup.o hpsim.o
11obj-$(CONFIG_IA64_GENERIC) += hpsim_machvec.o
12
13obj-$(CONFIG_HP_SIMETH) += simeth.o
14obj-$(CONFIG_HP_SIMSERIAL) += simserial.o
15obj-$(CONFIG_HP_SIMSERIAL_CONSOLE) += hpsim_console.o
16obj-$(CONFIG_HP_SIMSCSI) += simscsi.o
diff --git a/arch/ia64/hp/sim/boot/Makefile b/arch/ia64/hp/sim/boot/Makefile
new file mode 100644
index 000000000000..df6e9968c845
--- /dev/null
+++ b/arch/ia64/hp/sim/boot/Makefile
@@ -0,0 +1,37 @@
1#
2# ia64/boot/Makefile
3#
4# This file is subject to the terms and conditions of the GNU General Public
5# License. See the file "COPYING" in the main directory of this archive
6# for more details.
7#
8# Copyright (C) 1998, 2003 by David Mosberger-Tang <davidm@hpl.hp.com>
9#
10
11targets-$(CONFIG_IA64_HP_SIM) += bootloader
12targets := vmlinux.bin vmlinux.gz $(targets-y)
13
14quiet_cmd_cptotop = LN $@
15 cmd_cptotop = ln -f $< $@
16
17vmlinux.gz: $(obj)/vmlinux.gz $(addprefix $(obj)/,$(targets-y))
18 $(call cmd,cptotop)
19 @echo ' Kernel: $@ is ready'
20
21boot: bootloader
22
23bootloader: $(obj)/bootloader
24 $(call cmd,cptotop)
25
26$(obj)/vmlinux.gz: $(obj)/vmlinux.bin FORCE
27 $(call if_changed,gzip)
28
29$(obj)/vmlinux.bin: vmlinux FORCE
30 $(call if_changed,objcopy)
31
32
33LDFLAGS_bootloader = -static -T
34
35$(obj)/bootloader: $(src)/bootloader.lds $(obj)/bootloader.o $(obj)/boot_head.o $(obj)/fw-emu.o \
36 lib/lib.a arch/ia64/lib/lib.a FORCE
37 $(call if_changed,ld)
diff --git a/arch/ia64/hp/sim/boot/boot_head.S b/arch/ia64/hp/sim/boot/boot_head.S
new file mode 100644
index 000000000000..9364199e5632
--- /dev/null
+++ b/arch/ia64/hp/sim/boot/boot_head.S
@@ -0,0 +1,144 @@
1/*
2 * Copyright (C) 1998-2003 Hewlett-Packard Co
3 * David Mosberger-Tang <davidm@hpl.hp.com>
4 */
5
6#include <asm/asmmacro.h>
7
8 .bss
9 .align 16
10stack_mem:
11 .skip 16834
12
13 .text
14
15/* This needs to be defined because lib/string.c:strlcat() calls it in case of error... */
16GLOBAL_ENTRY(printk)
17 break 0
18END(printk)
19
20GLOBAL_ENTRY(_start)
21 .prologue
22 .save rp, r0
23 .body
24 movl gp = __gp
25 movl sp = stack_mem
26 bsw.1
27 br.call.sptk.many rp=start_bootloader
28END(_start)
29
30/*
31 * Set a break point on this function so that symbols are available to set breakpoints in
32 * the kernel being debugged.
33 */
34GLOBAL_ENTRY(debug_break)
35 br.ret.sptk.many b0
36END(debug_break)
37
38GLOBAL_ENTRY(ssc)
39 .regstk 5,0,0,0
40 mov r15=in4
41 break 0x80001
42 br.ret.sptk.many b0
43END(ssc)
44
45GLOBAL_ENTRY(jmp_to_kernel)
46 .regstk 2,0,0,0
47 mov r28=in0
48 mov b7=in1
49 br.sptk.few b7
50END(jmp_to_kernel)
51
52
53GLOBAL_ENTRY(pal_emulator_static)
54 mov r8=-1
55 mov r9=256
56 ;;
57 cmp.gtu p6,p7=r9,r28 /* r28 <= 255? */
58(p6) br.cond.sptk.few static
59 ;;
60 mov r9=512
61 ;;
62 cmp.gtu p6,p7=r9,r28
63(p6) br.cond.sptk.few stacked
64 ;;
65static: cmp.eq p6,p7=6,r28 /* PAL_PTCE_INFO */
66(p7) br.cond.sptk.few 1f
67 ;;
68 mov r8=0 /* status = 0 */
69 movl r9=0x100000000 /* tc.base */
70 movl r10=0x0000000200000003 /* count[0], count[1] */
71 movl r11=0x1000000000002000 /* stride[0], stride[1] */
72 br.cond.sptk.few rp
731: cmp.eq p6,p7=14,r28 /* PAL_FREQ_RATIOS */
74(p7) br.cond.sptk.few 1f
75 mov r8=0 /* status = 0 */
76 movl r9 =0x100000064 /* proc_ratio (1/100) */
77 movl r10=0x100000100 /* bus_ratio<<32 (1/256) */
78 movl r11=0x100000064 /* itc_ratio<<32 (1/100) */
79 ;;
801: cmp.eq p6,p7=19,r28 /* PAL_RSE_INFO */
81(p7) br.cond.sptk.few 1f
82 mov r8=0 /* status = 0 */
83 mov r9=96 /* num phys stacked */
84 mov r10=0 /* hints */
85 mov r11=0
86 br.cond.sptk.few rp
871: cmp.eq p6,p7=1,r28 /* PAL_CACHE_FLUSH */
88(p7) br.cond.sptk.few 1f
89 mov r9=ar.lc
90 movl r8=524288 /* flush 512k million cache lines (16MB) */
91 ;;
92 mov ar.lc=r8
93 movl r8=0xe000000000000000
94 ;;
95.loop: fc r8
96 add r8=32,r8
97 br.cloop.sptk.few .loop
98 sync.i
99 ;;
100 srlz.i
101 ;;
102 mov ar.lc=r9
103 mov r8=r0
104 ;;
1051: cmp.eq p6,p7=15,r28 /* PAL_PERF_MON_INFO */
106(p7) br.cond.sptk.few 1f
107 mov r8=0 /* status = 0 */
108 movl r9 =0x08122f04 /* generic=4 width=47 retired=8 cycles=18 */
109 mov r10=0 /* reserved */
110 mov r11=0 /* reserved */
111 mov r16=0xffff /* implemented PMC */
112 mov r17=0x3ffff /* implemented PMD */
113 add r18=8,r29 /* second index */
114 ;;
115 st8 [r29]=r16,16 /* store implemented PMC */
116 st8 [r18]=r0,16 /* clear remaining bits */
117 ;;
118 st8 [r29]=r0,16 /* clear remaining bits */
119 st8 [r18]=r0,16 /* clear remaining bits */
120 ;;
121 st8 [r29]=r17,16 /* store implemented PMD */
122 st8 [r18]=r0,16 /* clear remaining bits */
123 mov r16=0xf0 /* cycles count capable PMC */
124 ;;
125 st8 [r29]=r0,16 /* clear remaining bits */
126 st8 [r18]=r0,16 /* clear remaining bits */
127 mov r17=0xf0 /* retired bundles capable PMC */
128 ;;
129 st8 [r29]=r16,16 /* store cycles capable */
130 st8 [r18]=r0,16 /* clear remaining bits */
131 ;;
132 st8 [r29]=r0,16 /* clear remaining bits */
133 st8 [r18]=r0,16 /* clear remaining bits */
134 ;;
135 st8 [r29]=r17,16 /* store retired bundle capable */
136 st8 [r18]=r0,16 /* clear remaining bits */
137 ;;
138 st8 [r29]=r0,16 /* clear remaining bits */
139 st8 [r18]=r0,16 /* clear remaining bits */
140 ;;
1411: br.cond.sptk.few rp
142stacked:
143 br.ret.sptk.few rp
144END(pal_emulator_static)
diff --git a/arch/ia64/hp/sim/boot/bootloader.c b/arch/ia64/hp/sim/boot/bootloader.c
new file mode 100644
index 000000000000..51a7b7b4dd0e
--- /dev/null
+++ b/arch/ia64/hp/sim/boot/bootloader.c
@@ -0,0 +1,176 @@
1/*
2 * arch/ia64/hp/sim/boot/bootloader.c
3 *
4 * Loads an ELF kernel.
5 *
6 * Copyright (C) 1998-2003 Hewlett-Packard Co
7 * David Mosberger-Tang <davidm@hpl.hp.com>
8 * Stephane Eranian <eranian@hpl.hp.com>
9 *
10 * 01/07/99 S.Eranian modified to pass command line arguments to kernel
11 */
12struct task_struct; /* forward declaration for elf.h */
13
14#include <linux/config.h>
15#include <linux/elf.h>
16#include <linux/init.h>
17#include <linux/kernel.h>
18
19#include <asm/elf.h>
20#include <asm/intrinsics.h>
21#include <asm/pal.h>
22#include <asm/pgtable.h>
23#include <asm/sal.h>
24#include <asm/system.h>
25
26#include "ssc.h"
27
28struct disk_req {
29 unsigned long addr;
30 unsigned len;
31};
32
33struct disk_stat {
34 int fd;
35 unsigned count;
36};
37
38extern void jmp_to_kernel (unsigned long bp, unsigned long e_entry);
39extern struct ia64_boot_param *sys_fw_init (const char *args, int arglen);
40extern void debug_break (void);
41
42static void
43cons_write (const char *buf)
44{
45 unsigned long ch;
46
47 while ((ch = *buf++) != '\0') {
48 ssc(ch, 0, 0, 0, SSC_PUTCHAR);
49 if (ch == '\n')
50 ssc('\r', 0, 0, 0, SSC_PUTCHAR);
51 }
52}
53
54#define MAX_ARGS 32
55
56void
57start_bootloader (void)
58{
59 static char mem[4096];
60 static char buffer[1024];
61 unsigned long off;
62 int fd, i;
63 struct disk_req req;
64 struct disk_stat stat;
65 struct elfhdr *elf;
66 struct elf_phdr *elf_phdr; /* program header */
67 unsigned long e_entry, e_phoff, e_phnum;
68 register struct ia64_boot_param *bp;
69 char *kpath, *args;
70 long arglen = 0;
71
72 ssc(0, 0, 0, 0, SSC_CONSOLE_INIT);
73
74 /*
75 * S.Eranian: extract the commandline argument from the simulator
76 *
77 * The expected format is as follows:
78 *
79 * kernelname args...
80 *
81 * Both are optional but you can't have the second one without the first.
82 */
83 arglen = ssc((long) buffer, 0, 0, 0, SSC_GET_ARGS);
84
85 kpath = "vmlinux";
86 args = buffer;
87 if (arglen > 0) {
88 kpath = buffer;
89 while (*args != ' ' && *args != '\0')
90 ++args, --arglen;
91 if (*args == ' ')
92 *args++ = '\0', --arglen;
93 }
94
95 if (arglen <= 0) {
96 args = "";
97 arglen = 1;
98 }
99
100 fd = ssc((long) kpath, 1, 0, 0, SSC_OPEN);
101
102 if (fd < 0) {
103 cons_write(kpath);
104 cons_write(": file not found, reboot now\n");
105 for(;;);
106 }
107 stat.fd = fd;
108 off = 0;
109
110 req.len = sizeof(mem);
111 req.addr = (long) mem;
112 ssc(fd, 1, (long) &req, off, SSC_READ);
113 ssc((long) &stat, 0, 0, 0, SSC_WAIT_COMPLETION);
114
115 elf = (struct elfhdr *) mem;
116 if (elf->e_ident[0] == 0x7f && strncmp(elf->e_ident + 1, "ELF", 3) != 0) {
117 cons_write("not an ELF file\n");
118 return;
119 }
120 if (elf->e_type != ET_EXEC) {
121 cons_write("not an ELF executable\n");
122 return;
123 }
124 if (!elf_check_arch(elf)) {
125 cons_write("kernel not for this processor\n");
126 return;
127 }
128
129 e_entry = elf->e_entry;
130 e_phnum = elf->e_phnum;
131 e_phoff = elf->e_phoff;
132
133 cons_write("loading ");
134 cons_write(kpath);
135 cons_write("...\n");
136
137 for (i = 0; i < e_phnum; ++i) {
138 req.len = sizeof(*elf_phdr);
139 req.addr = (long) mem;
140 ssc(fd, 1, (long) &req, e_phoff, SSC_READ);
141 ssc((long) &stat, 0, 0, 0, SSC_WAIT_COMPLETION);
142 if (stat.count != sizeof(*elf_phdr)) {
143 cons_write("failed to read phdr\n");
144 return;
145 }
146 e_phoff += sizeof(*elf_phdr);
147
148 elf_phdr = (struct elf_phdr *) mem;
149
150 if (elf_phdr->p_type != PT_LOAD)
151 continue;
152
153 req.len = elf_phdr->p_filesz;
154 req.addr = __pa(elf_phdr->p_paddr);
155 ssc(fd, 1, (long) &req, elf_phdr->p_offset, SSC_READ);
156 ssc((long) &stat, 0, 0, 0, SSC_WAIT_COMPLETION);
157 memset((char *)__pa(elf_phdr->p_paddr) + elf_phdr->p_filesz, 0,
158 elf_phdr->p_memsz - elf_phdr->p_filesz);
159 }
160 ssc(fd, 0, 0, 0, SSC_CLOSE);
161
162 cons_write("starting kernel...\n");
163
164 /* fake an I/O base address: */
165 ia64_setreg(_IA64_REG_AR_KR0, 0xffffc000000UL);
166
167 bp = sys_fw_init(args, arglen);
168
169 ssc(0, (long) kpath, 0, 0, SSC_LOAD_SYMBOLS);
170
171 debug_break();
172 jmp_to_kernel((unsigned long) bp, e_entry);
173
174 cons_write("kernel returned!\n");
175 ssc(-1, 0, 0, 0, SSC_EXIT);
176}
diff --git a/arch/ia64/hp/sim/boot/bootloader.lds b/arch/ia64/hp/sim/boot/bootloader.lds
new file mode 100644
index 000000000000..69ae58531033
--- /dev/null
+++ b/arch/ia64/hp/sim/boot/bootloader.lds
@@ -0,0 +1,65 @@
1OUTPUT_FORMAT("elf64-ia64-little")
2OUTPUT_ARCH(ia64)
3ENTRY(_start)
4SECTIONS
5{
6 /* Read-only sections, merged into text segment: */
7 . = 0x100000;
8
9 _text = .;
10 .text : { *(__ivt_section) *(.text) }
11 _etext = .;
12
13 /* Global data */
14 _data = .;
15 .rodata : { *(.rodata) *(.rodata.*) }
16 .data : { *(.data) *(.gnu.linkonce.d*) CONSTRUCTORS }
17 __gp = ALIGN (8) + 0x200000;
18 .got : { *(.got.plt) *(.got) }
19 /* We want the small data sections together, so single-instruction offsets
20 can access them all, and initialized data all before uninitialized, so
21 we can shorten the on-disk segment size. */
22 .sdata : { *(.sdata) }
23 _edata = .;
24
25 _bss = .;
26 .sbss : { *(.sbss) *(.scommon) }
27 .bss : { *(.bss) *(COMMON) }
28 . = ALIGN(64 / 8);
29 _end = . ;
30
31 /* Stabs debugging sections. */
32 .stab 0 : { *(.stab) }
33 .stabstr 0 : { *(.stabstr) }
34 .stab.excl 0 : { *(.stab.excl) }
35 .stab.exclstr 0 : { *(.stab.exclstr) }
36 .stab.index 0 : { *(.stab.index) }
37 .stab.indexstr 0 : { *(.stab.indexstr) }
38 .comment 0 : { *(.comment) }
39 /* DWARF debug sections.
40 Symbols in the DWARF debugging sections are relative to the beginning
41 of the section so we begin them at 0. */
42 /* DWARF 1 */
43 .debug 0 : { *(.debug) }
44 .line 0 : { *(.line) }
45 /* GNU DWARF 1 extensions */
46 .debug_srcinfo 0 : { *(.debug_srcinfo) }
47 .debug_sfnames 0 : { *(.debug_sfnames) }
48 /* DWARF 1.1 and DWARF 2 */
49 .debug_aranges 0 : { *(.debug_aranges) }
50 .debug_pubnames 0 : { *(.debug_pubnames) }
51 /* DWARF 2 */
52 .debug_info 0 : { *(.debug_info) }
53 .debug_abbrev 0 : { *(.debug_abbrev) }
54 .debug_line 0 : { *(.debug_line) }
55 .debug_frame 0 : { *(.debug_frame) }
56 .debug_str 0 : { *(.debug_str) }
57 .debug_loc 0 : { *(.debug_loc) }
58 .debug_macinfo 0 : { *(.debug_macinfo) }
59 /* SGI/MIPS DWARF 2 extensions */
60 .debug_weaknames 0 : { *(.debug_weaknames) }
61 .debug_funcnames 0 : { *(.debug_funcnames) }
62 .debug_typenames 0 : { *(.debug_typenames) }
63 .debug_varnames 0 : { *(.debug_varnames) }
64 /* These must appear regardless of . */
65}
diff --git a/arch/ia64/hp/sim/boot/fw-emu.c b/arch/ia64/hp/sim/boot/fw-emu.c
new file mode 100644
index 000000000000..5c46928e3dc6
--- /dev/null
+++ b/arch/ia64/hp/sim/boot/fw-emu.c
@@ -0,0 +1,398 @@
1/*
2 * PAL & SAL emulation.
3 *
4 * Copyright (C) 1998-2001 Hewlett-Packard Co
5 * David Mosberger-Tang <davidm@hpl.hp.com>
6 */
7#include <linux/config.h>
8
9#ifdef CONFIG_PCI
10# include <linux/pci.h>
11#endif
12
13#include <linux/efi.h>
14#include <asm/io.h>
15#include <asm/pal.h>
16#include <asm/sal.h>
17
18#include "ssc.h"
19
20#define MB (1024*1024UL)
21
22#define SIMPLE_MEMMAP 1
23
24#if SIMPLE_MEMMAP
25# define NUM_MEM_DESCS 4
26#else
27# define NUM_MEM_DESCS 16
28#endif
29
30static char fw_mem[( sizeof(struct ia64_boot_param)
31 + sizeof(efi_system_table_t)
32 + sizeof(efi_runtime_services_t)
33 + 1*sizeof(efi_config_table_t)
34 + sizeof(struct ia64_sal_systab)
35 + sizeof(struct ia64_sal_desc_entry_point)
36 + NUM_MEM_DESCS*(sizeof(efi_memory_desc_t))
37 + 1024)] __attribute__ ((aligned (8)));
38
39#define SECS_PER_HOUR (60 * 60)
40#define SECS_PER_DAY (SECS_PER_HOUR * 24)
41
42/* Compute the `struct tm' representation of *T,
43 offset OFFSET seconds east of UTC,
44 and store year, yday, mon, mday, wday, hour, min, sec into *TP.
45 Return nonzero if successful. */
46int
47offtime (unsigned long t, efi_time_t *tp)
48{
49 const unsigned short int __mon_yday[2][13] =
50 {
51 /* Normal years. */
52 { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
53 /* Leap years. */
54 { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
55 };
56 long int days, rem, y;
57 const unsigned short int *ip;
58
59 days = t / SECS_PER_DAY;
60 rem = t % SECS_PER_DAY;
61 while (rem < 0) {
62 rem += SECS_PER_DAY;
63 --days;
64 }
65 while (rem >= SECS_PER_DAY) {
66 rem -= SECS_PER_DAY;
67 ++days;
68 }
69 tp->hour = rem / SECS_PER_HOUR;
70 rem %= SECS_PER_HOUR;
71 tp->minute = rem / 60;
72 tp->second = rem % 60;
73 /* January 1, 1970 was a Thursday. */
74 y = 1970;
75
76# define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
77# define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
78# define __isleap(year) \
79 ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
80
81 while (days < 0 || days >= (__isleap (y) ? 366 : 365)) {
82 /* Guess a corrected year, assuming 365 days per year. */
83 long int yg = y + days / 365 - (days % 365 < 0);
84
85 /* Adjust DAYS and Y to match the guessed year. */
86 days -= ((yg - y) * 365 + LEAPS_THRU_END_OF (yg - 1)
87 - LEAPS_THRU_END_OF (y - 1));
88 y = yg;
89 }
90 tp->year = y;
91 ip = __mon_yday[__isleap(y)];
92 for (y = 11; days < (long int) ip[y]; --y)
93 continue;
94 days -= ip[y];
95 tp->month = y + 1;
96 tp->day = days + 1;
97 return 1;
98}
99
100extern void pal_emulator_static (void);
101
102/* Macro to emulate SAL call using legacy IN and OUT calls to CF8, CFC etc.. */
103
104#define BUILD_CMD(addr) ((0x80000000 | (addr)) & ~3)
105
106#define REG_OFFSET(addr) (0x00000000000000FF & (addr))
107#define DEVICE_FUNCTION(addr) (0x000000000000FF00 & (addr))
108#define BUS_NUMBER(addr) (0x0000000000FF0000 & (addr))
109
110static efi_status_t
111fw_efi_get_time (efi_time_t *tm, efi_time_cap_t *tc)
112{
113#if defined(CONFIG_IA64_HP_SIM) || defined(CONFIG_IA64_GENERIC)
114 struct {
115 int tv_sec; /* must be 32bits to work */
116 int tv_usec;
117 } tv32bits;
118
119 ssc((unsigned long) &tv32bits, 0, 0, 0, SSC_GET_TOD);
120
121 memset(tm, 0, sizeof(*tm));
122 offtime(tv32bits.tv_sec, tm);
123
124 if (tc)
125 memset(tc, 0, sizeof(*tc));
126#else
127# error Not implemented yet...
128#endif
129 return EFI_SUCCESS;
130}
131
132static void
133efi_reset_system (int reset_type, efi_status_t status, unsigned long data_size, efi_char16_t *data)
134{
135#if defined(CONFIG_IA64_HP_SIM) || defined(CONFIG_IA64_GENERIC)
136 ssc(status, 0, 0, 0, SSC_EXIT);
137#else
138# error Not implemented yet...
139#endif
140}
141
142static efi_status_t
143efi_unimplemented (void)
144{
145 return EFI_UNSUPPORTED;
146}
147
148static struct sal_ret_values
149sal_emulator (long index, unsigned long in1, unsigned long in2,
150 unsigned long in3, unsigned long in4, unsigned long in5,
151 unsigned long in6, unsigned long in7)
152{
153 long r9 = 0;
154 long r10 = 0;
155 long r11 = 0;
156 long status;
157
158 /*
159 * Don't do a "switch" here since that gives us code that
160 * isn't self-relocatable.
161 */
162 status = 0;
163 if (index == SAL_FREQ_BASE) {
164 switch (in1) {
165 case SAL_FREQ_BASE_PLATFORM:
166 r9 = 200000000;
167 break;
168
169 case SAL_FREQ_BASE_INTERVAL_TIMER:
170 /*
171 * Is this supposed to be the cr.itc frequency
172 * or something platform specific? The SAL
173 * doc ain't exactly clear on this...
174 */
175 r9 = 700000000;
176 break;
177
178 case SAL_FREQ_BASE_REALTIME_CLOCK:
179 r9 = 1;
180 break;
181
182 default:
183 status = -1;
184 break;
185 }
186 } else if (index == SAL_SET_VECTORS) {
187 ;
188 } else if (index == SAL_GET_STATE_INFO) {
189 ;
190 } else if (index == SAL_GET_STATE_INFO_SIZE) {
191 ;
192 } else if (index == SAL_CLEAR_STATE_INFO) {
193 ;
194 } else if (index == SAL_MC_RENDEZ) {
195 ;
196 } else if (index == SAL_MC_SET_PARAMS) {
197 ;
198 } else if (index == SAL_CACHE_FLUSH) {
199 ;
200 } else if (index == SAL_CACHE_INIT) {
201 ;
202#ifdef CONFIG_PCI
203 } else if (index == SAL_PCI_CONFIG_READ) {
204 /*
205 * in1 contains the PCI configuration address and in2
206 * the size of the read. The value that is read is
207 * returned via the general register r9.
208 */
209 outl(BUILD_CMD(in1), 0xCF8);
210 if (in2 == 1) /* Reading byte */
211 r9 = inb(0xCFC + ((REG_OFFSET(in1) & 3)));
212 else if (in2 == 2) /* Reading word */
213 r9 = inw(0xCFC + ((REG_OFFSET(in1) & 2)));
214 else /* Reading dword */
215 r9 = inl(0xCFC);
216 status = PCIBIOS_SUCCESSFUL;
217 } else if (index == SAL_PCI_CONFIG_WRITE) {
218 /*
219 * in1 contains the PCI configuration address, in2 the
220 * size of the write, and in3 the actual value to be
221 * written out.
222 */
223 outl(BUILD_CMD(in1), 0xCF8);
224 if (in2 == 1) /* Writing byte */
225 outb(in3, 0xCFC + ((REG_OFFSET(in1) & 3)));
226 else if (in2 == 2) /* Writing word */
227 outw(in3, 0xCFC + ((REG_OFFSET(in1) & 2)));
228 else /* Writing dword */
229 outl(in3, 0xCFC);
230 status = PCIBIOS_SUCCESSFUL;
231#endif /* CONFIG_PCI */
232 } else if (index == SAL_UPDATE_PAL) {
233 ;
234 } else {
235 status = -1;
236 }
237 return ((struct sal_ret_values) {status, r9, r10, r11});
238}
239
240
241/*
242 * This is here to work around a bug in egcs-1.1.1b that causes the
243 * compiler to crash (seems like a bug in the new alias analysis code.
244 */
245void *
246id (long addr)
247{
248 return (void *) addr;
249}
250
251struct ia64_boot_param *
252sys_fw_init (const char *args, int arglen)
253{
254 efi_system_table_t *efi_systab;
255 efi_runtime_services_t *efi_runtime;
256 efi_config_table_t *efi_tables;
257 struct ia64_sal_systab *sal_systab;
258 efi_memory_desc_t *efi_memmap, *md;
259 unsigned long *pal_desc, *sal_desc;
260 struct ia64_sal_desc_entry_point *sal_ed;
261 struct ia64_boot_param *bp;
262 unsigned char checksum = 0;
263 char *cp, *cmd_line;
264 int i = 0;
265# define MAKE_MD(typ, attr, start, end) \
266 do { \
267 md = efi_memmap + i++; \
268 md->type = typ; \
269 md->pad = 0; \
270 md->phys_addr = start; \
271 md->virt_addr = 0; \
272 md->num_pages = (end - start) >> 12; \
273 md->attribute = attr; \
274 } while (0)
275
276 memset(fw_mem, 0, sizeof(fw_mem));
277
278 pal_desc = (unsigned long *) &pal_emulator_static;
279 sal_desc = (unsigned long *) &sal_emulator;
280
281 cp = fw_mem;
282 efi_systab = (void *) cp; cp += sizeof(*efi_systab);
283 efi_runtime = (void *) cp; cp += sizeof(*efi_runtime);
284 efi_tables = (void *) cp; cp += sizeof(*efi_tables);
285 sal_systab = (void *) cp; cp += sizeof(*sal_systab);
286 sal_ed = (void *) cp; cp += sizeof(*sal_ed);
287 efi_memmap = (void *) cp; cp += NUM_MEM_DESCS*sizeof(*efi_memmap);
288 bp = (void *) cp; cp += sizeof(*bp);
289 cmd_line = (void *) cp;
290
291 if (args) {
292 if (arglen >= 1024)
293 arglen = 1023;
294 memcpy(cmd_line, args, arglen);
295 } else {
296 arglen = 0;
297 }
298 cmd_line[arglen] = '\0';
299
300 memset(efi_systab, 0, sizeof(efi_systab));
301 efi_systab->hdr.signature = EFI_SYSTEM_TABLE_SIGNATURE;
302 efi_systab->hdr.revision = EFI_SYSTEM_TABLE_REVISION;
303 efi_systab->hdr.headersize = sizeof(efi_systab->hdr);
304 efi_systab->fw_vendor = __pa("H\0e\0w\0l\0e\0t\0t\0-\0P\0a\0c\0k\0a\0r\0d\0\0");
305 efi_systab->fw_revision = 1;
306 efi_systab->runtime = (void *) __pa(efi_runtime);
307 efi_systab->nr_tables = 1;
308 efi_systab->tables = __pa(efi_tables);
309
310 efi_runtime->hdr.signature = EFI_RUNTIME_SERVICES_SIGNATURE;
311 efi_runtime->hdr.revision = EFI_RUNTIME_SERVICES_REVISION;
312 efi_runtime->hdr.headersize = sizeof(efi_runtime->hdr);
313 efi_runtime->get_time = __pa(&fw_efi_get_time);
314 efi_runtime->set_time = __pa(&efi_unimplemented);
315 efi_runtime->get_wakeup_time = __pa(&efi_unimplemented);
316 efi_runtime->set_wakeup_time = __pa(&efi_unimplemented);
317 efi_runtime->set_virtual_address_map = __pa(&efi_unimplemented);
318 efi_runtime->get_variable = __pa(&efi_unimplemented);
319 efi_runtime->get_next_variable = __pa(&efi_unimplemented);
320 efi_runtime->set_variable = __pa(&efi_unimplemented);
321 efi_runtime->get_next_high_mono_count = __pa(&efi_unimplemented);
322 efi_runtime->reset_system = __pa(&efi_reset_system);
323
324 efi_tables->guid = SAL_SYSTEM_TABLE_GUID;
325 efi_tables->table = __pa(sal_systab);
326
327 /* fill in the SAL system table: */
328 memcpy(sal_systab->signature, "SST_", 4);
329 sal_systab->size = sizeof(*sal_systab);
330 sal_systab->sal_rev_minor = 1;
331 sal_systab->sal_rev_major = 0;
332 sal_systab->entry_count = 1;
333
334#ifdef CONFIG_IA64_GENERIC
335 strcpy(sal_systab->oem_id, "Generic");
336 strcpy(sal_systab->product_id, "IA-64 system");
337#endif
338
339#ifdef CONFIG_IA64_HP_SIM
340 strcpy(sal_systab->oem_id, "Hewlett-Packard");
341 strcpy(sal_systab->product_id, "HP-simulator");
342#endif
343
344#ifdef CONFIG_IA64_SDV
345 strcpy(sal_systab->oem_id, "Intel");
346 strcpy(sal_systab->product_id, "SDV");
347#endif
348
349 /* fill in an entry point: */
350 sal_ed->type = SAL_DESC_ENTRY_POINT;
351 sal_ed->pal_proc = __pa(pal_desc[0]);
352 sal_ed->sal_proc = __pa(sal_desc[0]);
353 sal_ed->gp = __pa(sal_desc[1]);
354
355 for (cp = (char *) sal_systab; cp < (char *) efi_memmap; ++cp)
356 checksum += *cp;
357
358 sal_systab->checksum = -checksum;
359
360#if SIMPLE_MEMMAP
361 /* simulate free memory at physical address zero */
362 MAKE_MD(EFI_BOOT_SERVICES_DATA, EFI_MEMORY_WB, 0*MB, 1*MB);
363 MAKE_MD(EFI_PAL_CODE, EFI_MEMORY_WB, 1*MB, 2*MB);
364 MAKE_MD(EFI_CONVENTIONAL_MEMORY, EFI_MEMORY_WB, 2*MB, 130*MB);
365 MAKE_MD(EFI_CONVENTIONAL_MEMORY, EFI_MEMORY_WB, 4096*MB, 4128*MB);
366#else
367 MAKE_MD( 4, 0x9, 0x0000000000000000, 0x0000000000001000);
368 MAKE_MD( 7, 0x9, 0x0000000000001000, 0x000000000008a000);
369 MAKE_MD( 4, 0x9, 0x000000000008a000, 0x00000000000a0000);
370 MAKE_MD( 5, 0x8000000000000009, 0x00000000000c0000, 0x0000000000100000);
371 MAKE_MD( 7, 0x9, 0x0000000000100000, 0x0000000004400000);
372 MAKE_MD( 2, 0x9, 0x0000000004400000, 0x0000000004be5000);
373 MAKE_MD( 7, 0x9, 0x0000000004be5000, 0x000000007f77e000);
374 MAKE_MD( 6, 0x8000000000000009, 0x000000007f77e000, 0x000000007fb94000);
375 MAKE_MD( 6, 0x8000000000000009, 0x000000007fb94000, 0x000000007fb95000);
376 MAKE_MD( 6, 0x8000000000000009, 0x000000007fb95000, 0x000000007fc00000);
377 MAKE_MD(13, 0x8000000000000009, 0x000000007fc00000, 0x000000007fc3a000);
378 MAKE_MD( 7, 0x9, 0x000000007fc3a000, 0x000000007fea0000);
379 MAKE_MD( 5, 0x8000000000000009, 0x000000007fea0000, 0x000000007fea8000);
380 MAKE_MD( 7, 0x9, 0x000000007fea8000, 0x000000007feab000);
381 MAKE_MD( 5, 0x8000000000000009, 0x000000007feab000, 0x000000007ffff000);
382 MAKE_MD( 7, 0x9, 0x00000000ff400000, 0x0000000104000000);
383#endif
384
385 bp->efi_systab = __pa(&fw_mem);
386 bp->efi_memmap = __pa(efi_memmap);
387 bp->efi_memmap_size = NUM_MEM_DESCS*sizeof(efi_memory_desc_t);
388 bp->efi_memdesc_size = sizeof(efi_memory_desc_t);
389 bp->efi_memdesc_version = 1;
390 bp->command_line = __pa(cmd_line);
391 bp->console_info.num_cols = 80;
392 bp->console_info.num_rows = 25;
393 bp->console_info.orig_x = 0;
394 bp->console_info.orig_y = 24;
395 bp->fpswa = 0;
396
397 return bp;
398}
diff --git a/arch/ia64/hp/sim/boot/ssc.h b/arch/ia64/hp/sim/boot/ssc.h
new file mode 100644
index 000000000000..3b94c03e43a9
--- /dev/null
+++ b/arch/ia64/hp/sim/boot/ssc.h
@@ -0,0 +1,35 @@
1/*
2 * Copyright (C) 1998-2003 Hewlett-Packard Co
3 * David Mosberger-Tang <davidm@hpl.hp.com>
4 * Stephane Eranian <eranian@hpl.hp.com>
5 */
6#ifndef ssc_h
7#define ssc_h
8
9/* Simulator system calls: */
10
11#define SSC_CONSOLE_INIT 20
12#define SSC_GETCHAR 21
13#define SSC_PUTCHAR 31
14#define SSC_OPEN 50
15#define SSC_CLOSE 51
16#define SSC_READ 52
17#define SSC_WRITE 53
18#define SSC_GET_COMPLETION 54
19#define SSC_WAIT_COMPLETION 55
20#define SSC_CONNECT_INTERRUPT 58
21#define SSC_GENERATE_INTERRUPT 59
22#define SSC_SET_PERIODIC_INTERRUPT 60
23#define SSC_GET_RTC 65
24#define SSC_EXIT 66
25#define SSC_LOAD_SYMBOLS 69
26#define SSC_GET_TOD 74
27
28#define SSC_GET_ARGS 75
29
30/*
31 * Simulator system call.
32 */
33extern long ssc (long arg0, long arg1, long arg2, long arg3, int nr);
34
35#endif /* ssc_h */
diff --git a/arch/ia64/hp/sim/hpsim.S b/arch/ia64/hp/sim/hpsim.S
new file mode 100644
index 000000000000..ff16e8a857d1
--- /dev/null
+++ b/arch/ia64/hp/sim/hpsim.S
@@ -0,0 +1,10 @@
1#include <asm/asmmacro.h>
2
3/*
4 * Simulator system call.
5 */
6GLOBAL_ENTRY(ia64_ssc)
7 mov r15=r36
8 break 0x80001
9 br.ret.sptk.many rp
10END(ia64_ssc)
diff --git a/arch/ia64/hp/sim/hpsim_console.c b/arch/ia64/hp/sim/hpsim_console.c
new file mode 100644
index 000000000000..5deff21e5877
--- /dev/null
+++ b/arch/ia64/hp/sim/hpsim_console.c
@@ -0,0 +1,65 @@
1/*
2 * Platform dependent support for HP simulator.
3 *
4 * Copyright (C) 1998, 1999, 2002 Hewlett-Packard Co
5 * David Mosberger-Tang <davidm@hpl.hp.com>
6 * Copyright (C) 1999 Vijay Chander <vijay@engr.sgi.com>
7 */
8#include <linux/config.h>
9
10#include <linux/init.h>
11#include <linux/kernel.h>
12#include <linux/param.h>
13#include <linux/string.h>
14#include <linux/types.h>
15#include <linux/tty.h>
16#include <linux/kdev_t.h>
17#include <linux/console.h>
18
19#include <asm/delay.h>
20#include <asm/irq.h>
21#include <asm/pal.h>
22#include <asm/machvec.h>
23#include <asm/pgtable.h>
24#include <asm/sal.h>
25
26#include "hpsim_ssc.h"
27
28static int simcons_init (struct console *, char *);
29static void simcons_write (struct console *, const char *, unsigned);
30static struct tty_driver *simcons_console_device (struct console *, int *);
31
32struct console hpsim_cons = {
33 .name = "simcons",
34 .write = simcons_write,
35 .device = simcons_console_device,
36 .setup = simcons_init,
37 .flags = CON_PRINTBUFFER,
38 .index = -1,
39};
40
41static int
42simcons_init (struct console *cons, char *options)
43{
44 return 0;
45}
46
47static void
48simcons_write (struct console *cons, const char *buf, unsigned count)
49{
50 unsigned long ch;
51
52 while (count-- > 0) {
53 ch = *buf++;
54 ia64_ssc(ch, 0, 0, 0, SSC_PUTCHAR);
55 if (ch == '\n')
56 ia64_ssc('\r', 0, 0, 0, SSC_PUTCHAR);
57 }
58}
59
60static struct tty_driver *simcons_console_device (struct console *c, int *index)
61{
62 extern struct tty_driver *hp_simserial_driver;
63 *index = c->index;
64 return hp_simserial_driver;
65}
diff --git a/arch/ia64/hp/sim/hpsim_irq.c b/arch/ia64/hp/sim/hpsim_irq.c
new file mode 100644
index 000000000000..c0d25a2a3e9c
--- /dev/null
+++ b/arch/ia64/hp/sim/hpsim_irq.c
@@ -0,0 +1,51 @@
1/*
2 * Platform dependent support for HP simulator.
3 *
4 * Copyright (C) 1998-2001 Hewlett-Packard Co
5 * Copyright (C) 1998-2001 David Mosberger-Tang <davidm@hpl.hp.com>
6 */
7
8#include <linux/init.h>
9#include <linux/kernel.h>
10#include <linux/sched.h>
11#include <linux/irq.h>
12
13static unsigned int
14hpsim_irq_startup (unsigned int irq)
15{
16 return 0;
17}
18
19static void
20hpsim_irq_noop (unsigned int irq)
21{
22}
23
24static void
25hpsim_set_affinity_noop (unsigned int a, cpumask_t b)
26{
27}
28
29static struct hw_interrupt_type irq_type_hp_sim = {
30 .typename = "hpsim",
31 .startup = hpsim_irq_startup,
32 .shutdown = hpsim_irq_noop,
33 .enable = hpsim_irq_noop,
34 .disable = hpsim_irq_noop,
35 .ack = hpsim_irq_noop,
36 .end = hpsim_irq_noop,
37 .set_affinity = hpsim_set_affinity_noop,
38};
39
40void __init
41hpsim_irq_init (void)
42{
43 irq_desc_t *idesc;
44 int i;
45
46 for (i = 0; i < NR_IRQS; ++i) {
47 idesc = irq_descp(i);
48 if (idesc->handler == &no_irq_type)
49 idesc->handler = &irq_type_hp_sim;
50 }
51}
diff --git a/arch/ia64/hp/sim/hpsim_machvec.c b/arch/ia64/hp/sim/hpsim_machvec.c
new file mode 100644
index 000000000000..c21419359185
--- /dev/null
+++ b/arch/ia64/hp/sim/hpsim_machvec.c
@@ -0,0 +1,3 @@
1#define MACHVEC_PLATFORM_NAME hpsim
2#define MACHVEC_PLATFORM_HEADER <asm/machvec_hpsim.h>
3#include <asm/machvec_init.h>
diff --git a/arch/ia64/hp/sim/hpsim_setup.c b/arch/ia64/hp/sim/hpsim_setup.c
new file mode 100644
index 000000000000..694fc86bfbd5
--- /dev/null
+++ b/arch/ia64/hp/sim/hpsim_setup.c
@@ -0,0 +1,52 @@
1/*
2 * Platform dependent support for HP simulator.
3 *
4 * Copyright (C) 1998, 1999, 2002 Hewlett-Packard Co
5 * David Mosberger-Tang <davidm@hpl.hp.com>
6 * Copyright (C) 1999 Vijay Chander <vijay@engr.sgi.com>
7 */
8#include <linux/config.h>
9#include <linux/console.h>
10#include <linux/init.h>
11#include <linux/kdev_t.h>
12#include <linux/kernel.h>
13#include <linux/major.h>
14#include <linux/param.h>
15#include <linux/root_dev.h>
16#include <linux/string.h>
17#include <linux/types.h>
18
19#include <asm/delay.h>
20#include <asm/irq.h>
21#include <asm/pal.h>
22#include <asm/machvec.h>
23#include <asm/pgtable.h>
24#include <asm/sal.h>
25
26#include "hpsim_ssc.h"
27
28void
29ia64_ssc_connect_irq (long intr, long irq)
30{
31 ia64_ssc(intr, irq, 0, 0, SSC_CONNECT_INTERRUPT);
32}
33
34void
35ia64_ctl_trace (long on)
36{
37 ia64_ssc(on, 0, 0, 0, SSC_CTL_TRACE);
38}
39
40void __init
41hpsim_setup (char **cmdline_p)
42{
43 ROOT_DEV = Root_SDA1; /* default to first SCSI drive */
44
45#ifdef CONFIG_HP_SIMSERIAL_CONSOLE
46 {
47 extern struct console hpsim_cons;
48 if (ia64_platform_is("hpsim"))
49 register_console(&hpsim_cons);
50 }
51#endif
52}
diff --git a/arch/ia64/hp/sim/hpsim_ssc.h b/arch/ia64/hp/sim/hpsim_ssc.h
new file mode 100644
index 000000000000..bfa3906274b3
--- /dev/null
+++ b/arch/ia64/hp/sim/hpsim_ssc.h
@@ -0,0 +1,36 @@
1/*
2 * Platform dependent support for HP simulator.
3 *
4 * Copyright (C) 1998, 1999 Hewlett-Packard Co
5 * Copyright (C) 1998, 1999 David Mosberger-Tang <davidm@hpl.hp.com>
6 * Copyright (C) 1999 Vijay Chander <vijay@engr.sgi.com>
7 */
8#ifndef _IA64_PLATFORM_HPSIM_SSC_H
9#define _IA64_PLATFORM_HPSIM_SSC_H
10
11/* Simulator system calls: */
12
13#define SSC_CONSOLE_INIT 20
14#define SSC_GETCHAR 21
15#define SSC_PUTCHAR 31
16#define SSC_CONNECT_INTERRUPT 58
17#define SSC_GENERATE_INTERRUPT 59
18#define SSC_SET_PERIODIC_INTERRUPT 60
19#define SSC_GET_RTC 65
20#define SSC_EXIT 66
21#define SSC_LOAD_SYMBOLS 69
22#define SSC_GET_TOD 74
23#define SSC_CTL_TRACE 76
24
25#define SSC_NETDEV_PROBE 100
26#define SSC_NETDEV_SEND 101
27#define SSC_NETDEV_RECV 102
28#define SSC_NETDEV_ATTACH 103
29#define SSC_NETDEV_DETACH 104
30
31/*
32 * Simulator system call.
33 */
34extern long ia64_ssc (long arg0, long arg1, long arg2, long arg3, int nr);
35
36#endif /* _IA64_PLATFORM_HPSIM_SSC_H */
diff --git a/arch/ia64/hp/sim/simeth.c b/arch/ia64/hp/sim/simeth.c
new file mode 100644
index 000000000000..ae84a1018a89
--- /dev/null
+++ b/arch/ia64/hp/sim/simeth.c
@@ -0,0 +1,530 @@
1/*
2 * Simulated Ethernet Driver
3 *
4 * Copyright (C) 1999-2001, 2003 Hewlett-Packard Co
5 * Stephane Eranian <eranian@hpl.hp.com>
6 */
7#include <linux/config.h>
8#include <linux/kernel.h>
9#include <linux/sched.h>
10#include <linux/types.h>
11#include <linux/in.h>
12#include <linux/string.h>
13#include <linux/init.h>
14#include <linux/errno.h>
15#include <linux/interrupt.h>
16#include <linux/netdevice.h>
17#include <linux/etherdevice.h>
18#include <linux/inetdevice.h>
19#include <linux/if_ether.h>
20#include <linux/if_arp.h>
21#include <linux/skbuff.h>
22#include <linux/notifier.h>
23#include <linux/bitops.h>
24#include <asm/system.h>
25#include <asm/irq.h>
26
27#define SIMETH_RECV_MAX 10
28
29/*
30 * Maximum possible received frame for Ethernet.
31 * We preallocate an sk_buff of that size to avoid costly
32 * memcpy for temporary buffer into sk_buff. We do basically
33 * what's done in other drivers, like eepro with a ring.
34 * The difference is, of course, that we don't have real DMA !!!
35 */
36#define SIMETH_FRAME_SIZE ETH_FRAME_LEN
37
38
39#define SSC_NETDEV_PROBE 100
40#define SSC_NETDEV_SEND 101
41#define SSC_NETDEV_RECV 102
42#define SSC_NETDEV_ATTACH 103
43#define SSC_NETDEV_DETACH 104
44
45#define NETWORK_INTR 8
46
47struct simeth_local {
48 struct net_device_stats stats;
49 int simfd; /* descriptor in the simulator */
50};
51
52static int simeth_probe1(void);
53static int simeth_open(struct net_device *dev);
54static int simeth_close(struct net_device *dev);
55static int simeth_tx(struct sk_buff *skb, struct net_device *dev);
56static int simeth_rx(struct net_device *dev);
57static struct net_device_stats *simeth_get_stats(struct net_device *dev);
58static irqreturn_t simeth_interrupt(int irq, void *dev_id, struct pt_regs * regs);
59static void set_multicast_list(struct net_device *dev);
60static int simeth_device_event(struct notifier_block *this,unsigned long event, void *ptr);
61
62static char *simeth_version="0.3";
63
64/*
65 * This variable is used to establish a mapping between the Linux/ia64 kernel
66 * and the host linux kernel.
67 *
68 * As of today, we support only one card, even though most of the code
69 * is ready for many more. The mapping is then:
70 * linux/ia64 -> linux/x86
71 * eth0 -> eth1
72 *
73 * In the future, we some string operations, we could easily support up
74 * to 10 cards (0-9).
75 *
76 * The default mapping can be changed on the kernel command line by
77 * specifying simeth=ethX (or whatever string you want).
78 */
79static char *simeth_device="eth0"; /* default host interface to use */
80
81
82
83static volatile unsigned int card_count; /* how many cards "found" so far */
84static int simeth_debug; /* set to 1 to get debug information */
85
86/*
87 * Used to catch IFF_UP & IFF_DOWN events
88 */
89static struct notifier_block simeth_dev_notifier = {
90 simeth_device_event,
91 0
92};
93
94
95/*
96 * Function used when using a kernel command line option.
97 *
98 * Format: simeth=interface_name (like eth0)
99 */
100static int __init
101simeth_setup(char *str)
102{
103 simeth_device = str;
104 return 1;
105}
106
107__setup("simeth=", simeth_setup);
108
109/*
110 * Function used to probe for simeth devices when not installed
111 * as a loadable module
112 */
113
114int __init
115simeth_probe (void)
116{
117 int r;
118
119 printk(KERN_INFO "simeth: v%s\n", simeth_version);
120
121 r = simeth_probe1();
122
123 if (r == 0) register_netdevice_notifier(&simeth_dev_notifier);
124
125 return r;
126}
127
128extern long ia64_ssc (long, long, long, long, int);
129extern void ia64_ssc_connect_irq (long intr, long irq);
130
131static inline int
132netdev_probe(char *name, unsigned char *ether)
133{
134 return ia64_ssc(__pa(name), __pa(ether), 0,0, SSC_NETDEV_PROBE);
135}
136
137
138static inline int
139netdev_connect(int irq)
140{
141 /* XXX Fix me
142 * this does not support multiple cards
143 * also no return value
144 */
145 ia64_ssc_connect_irq(NETWORK_INTR, irq);
146 return 0;
147}
148
149static inline int
150netdev_attach(int fd, int irq, unsigned int ipaddr)
151{
152 /* this puts the host interface in the right mode (start interrupting) */
153 return ia64_ssc(fd, ipaddr, 0,0, SSC_NETDEV_ATTACH);
154}
155
156
157static inline int
158netdev_detach(int fd)
159{
160 /*
161 * inactivate the host interface (don't interrupt anymore) */
162 return ia64_ssc(fd, 0,0,0, SSC_NETDEV_DETACH);
163}
164
165static inline int
166netdev_send(int fd, unsigned char *buf, unsigned int len)
167{
168 return ia64_ssc(fd, __pa(buf), len, 0, SSC_NETDEV_SEND);
169}
170
171static inline int
172netdev_read(int fd, unsigned char *buf, unsigned int len)
173{
174 return ia64_ssc(fd, __pa(buf), len, 0, SSC_NETDEV_RECV);
175}
176
177/*
178 * Function shared with module code, so cannot be in init section
179 *
180 * So far this function "detects" only one card (test_&_set) but could
181 * be extended easily.
182 *
183 * Return:
184 * - -ENODEV is no device found
185 * - -ENOMEM is no more memory
186 * - 0 otherwise
187 */
188static int
189simeth_probe1(void)
190{
191 unsigned char mac_addr[ETH_ALEN];
192 struct simeth_local *local;
193 struct net_device *dev;
194 int fd, i, err;
195
196 /*
197 * XXX Fix me
198 * let's support just one card for now
199 */
200 if (test_and_set_bit(0, &card_count))
201 return -ENODEV;
202
203 /*
204 * check with the simulator for the device
205 */
206 fd = netdev_probe(simeth_device, mac_addr);
207 if (fd == -1)
208 return -ENODEV;
209
210 dev = alloc_etherdev(sizeof(struct simeth_local));
211 if (!dev)
212 return -ENOMEM;
213
214 memcpy(dev->dev_addr, mac_addr, sizeof(mac_addr));
215
216 local = dev->priv;
217 local->simfd = fd; /* keep track of underlying file descriptor */
218
219 dev->open = simeth_open;
220 dev->stop = simeth_close;
221 dev->hard_start_xmit = simeth_tx;
222 dev->get_stats = simeth_get_stats;
223 dev->set_multicast_list = set_multicast_list; /* no yet used */
224
225 err = register_netdev(dev);
226 if (err) {
227 free_netdev(dev);
228 return err;
229 }
230
231 dev->irq = assign_irq_vector(AUTO_ASSIGN);
232
233 /*
234 * attach the interrupt in the simulator, this does enable interrupts
235 * until a netdev_attach() is called
236 */
237 netdev_connect(dev->irq);
238
239 printk(KERN_INFO "%s: hosteth=%s simfd=%d, HwAddr",
240 dev->name, simeth_device, local->simfd);
241 for(i = 0; i < ETH_ALEN; i++) {
242 printk(" %2.2x", dev->dev_addr[i]);
243 }
244 printk(", IRQ %d\n", dev->irq);
245
246 return 0;
247}
248
249/*
250 * actually binds the device to an interrupt vector
251 */
252static int
253simeth_open(struct net_device *dev)
254{
255 if (request_irq(dev->irq, simeth_interrupt, 0, "simeth", dev)) {
256 printk(KERN_WARNING "simeth: unable to get IRQ %d.\n", dev->irq);
257 return -EAGAIN;
258 }
259
260 netif_start_queue(dev);
261
262 return 0;
263}
264
265/* copied from lapbether.c */
266static __inline__ int dev_is_ethdev(struct net_device *dev)
267{
268 return ( dev->type == ARPHRD_ETHER && strncmp(dev->name, "dummy", 5));
269}
270
271
272/*
273 * Handler for IFF_UP or IFF_DOWN
274 *
275 * The reason for that is that we don't want to be interrupted when the
276 * interface is down. There is no way to unconnect in the simualtor. Instead
277 * we use this function to shutdown packet processing in the frame filter
278 * in the simulator. Thus no interrupts are generated
279 *
280 *
281 * That's also the place where we pass the IP address of this device to the
282 * simulator so that that we can start filtering packets for it
283 *
284 * There may be a better way of doing this, but I don't know which yet.
285 */
286static int
287simeth_device_event(struct notifier_block *this,unsigned long event, void *ptr)
288{
289 struct net_device *dev = ptr;
290 struct simeth_local *local;
291 struct in_device *in_dev;
292 struct in_ifaddr **ifap = NULL;
293 struct in_ifaddr *ifa = NULL;
294 int r;
295
296
297 if ( ! dev ) {
298 printk(KERN_WARNING "simeth_device_event dev=0\n");
299 return NOTIFY_DONE;
300 }
301
302 if ( event != NETDEV_UP && event != NETDEV_DOWN ) return NOTIFY_DONE;
303
304 /*
305 * Check whether or not it's for an ethernet device
306 *
307 * XXX Fixme: This works only as long as we support one
308 * type of ethernet device.
309 */
310 if ( !dev_is_ethdev(dev) ) return NOTIFY_DONE;
311
312 if ((in_dev=dev->ip_ptr) != NULL) {
313 for (ifap=&in_dev->ifa_list; (ifa=*ifap) != NULL; ifap=&ifa->ifa_next)
314 if (strcmp(dev->name, ifa->ifa_label) == 0) break;
315 }
316 if ( ifa == NULL ) {
317 printk(KERN_ERR "simeth_open: can't find device %s's ifa\n", dev->name);
318 return NOTIFY_DONE;
319 }
320
321 printk(KERN_INFO "simeth_device_event: %s ipaddr=0x%x\n",
322 dev->name, htonl(ifa->ifa_local));
323
324 /*
325 * XXX Fix me
326 * if the device was up, and we're simply reconfiguring it, not sure
327 * we get DOWN then UP.
328 */
329
330 local = dev->priv;
331 /* now do it for real */
332 r = event == NETDEV_UP ?
333 netdev_attach(local->simfd, dev->irq, htonl(ifa->ifa_local)):
334 netdev_detach(local->simfd);
335
336 printk(KERN_INFO "simeth: netdev_attach/detach: event=%s ->%d\n",
337 event == NETDEV_UP ? "attach":"detach", r);
338
339 return NOTIFY_DONE;
340}
341
342static int
343simeth_close(struct net_device *dev)
344{
345 netif_stop_queue(dev);
346
347 free_irq(dev->irq, dev);
348
349 return 0;
350}
351
352/*
353 * Only used for debug
354 */
355static void
356frame_print(unsigned char *from, unsigned char *frame, int len)
357{
358 int i;
359
360 printk("%s: (%d) %02x", from, len, frame[0] & 0xff);
361 for(i=1; i < 6; i++ ) {
362 printk(":%02x", frame[i] &0xff);
363 }
364 printk(" %2x", frame[6] &0xff);
365 for(i=7; i < 12; i++ ) {
366 printk(":%02x", frame[i] &0xff);
367 }
368 printk(" [%02x%02x]\n", frame[12], frame[13]);
369
370 for(i=14; i < len; i++ ) {
371 printk("%02x ", frame[i] &0xff);
372 if ( (i%10)==0) printk("\n");
373 }
374 printk("\n");
375}
376
377
378/*
379 * Function used to transmit of frame, very last one on the path before
380 * going to the simulator.
381 */
382static int
383simeth_tx(struct sk_buff *skb, struct net_device *dev)
384{
385 struct simeth_local *local = dev->priv;
386
387#if 0
388 /* ensure we have at least ETH_ZLEN bytes (min frame size) */
389 unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
390 /* Where do the extra padding bytes comes from inthe skbuff ? */
391#else
392 /* the real driver in the host system is going to take care of that
393 * or maybe it's the NIC itself.
394 */
395 unsigned int length = skb->len;
396#endif
397
398 local->stats.tx_bytes += skb->len;
399 local->stats.tx_packets++;
400
401
402 if (simeth_debug > 5) frame_print("simeth_tx", skb->data, length);
403
404 netdev_send(local->simfd, skb->data, length);
405
406 /*
407 * we are synchronous on write, so we don't simulate a
408 * trasnmit complete interrupt, thus we don't need to arm a tx
409 */
410
411 dev_kfree_skb(skb);
412 return 0;
413}
414
415static inline struct sk_buff *
416make_new_skb(struct net_device *dev)
417{
418 struct sk_buff *nskb;
419
420 /*
421 * The +2 is used to make sure that the IP header is nicely
422 * aligned (on 4byte boundary I assume 14+2=16)
423 */
424 nskb = dev_alloc_skb(SIMETH_FRAME_SIZE + 2);
425 if ( nskb == NULL ) {
426 printk(KERN_NOTICE "%s: memory squeeze. dropping packet.\n", dev->name);
427 return NULL;
428 }
429 nskb->dev = dev;
430
431 skb_reserve(nskb, 2); /* Align IP on 16 byte boundaries */
432
433 skb_put(nskb,SIMETH_FRAME_SIZE);
434
435 return nskb;
436}
437
438/*
439 * called from interrupt handler to process a received frame
440 */
441static int
442simeth_rx(struct net_device *dev)
443{
444 struct simeth_local *local;
445 struct sk_buff *skb;
446 int len;
447 int rcv_count = SIMETH_RECV_MAX;
448
449 local = dev->priv;
450 /*
451 * the loop concept has been borrowed from other drivers
452 * looks to me like it's a throttling thing to avoid pushing to many
453 * packets at one time into the stack. Making sure we can process them
454 * upstream and make forward progress overall
455 */
456 do {
457 if ( (skb=make_new_skb(dev)) == NULL ) {
458 printk(KERN_NOTICE "%s: memory squeeze. dropping packet.\n", dev->name);
459 local->stats.rx_dropped++;
460 return 0;
461 }
462 /*
463 * Read only one frame at a time
464 */
465 len = netdev_read(local->simfd, skb->data, SIMETH_FRAME_SIZE);
466 if ( len == 0 ) {
467 if ( simeth_debug > 0 ) printk(KERN_WARNING "%s: count=%d netdev_read=0\n",
468 dev->name, SIMETH_RECV_MAX-rcv_count);
469 break;
470 }
471#if 0
472 /*
473 * XXX Fix me
474 * Should really do a csum+copy here
475 */
476 memcpy(skb->data, frame, len);
477#endif
478 skb->protocol = eth_type_trans(skb, dev);
479
480 if ( simeth_debug > 6 ) frame_print("simeth_rx", skb->data, len);
481
482 /*
483 * push the packet up & trigger software interrupt
484 */
485 netif_rx(skb);
486
487 local->stats.rx_packets++;
488 local->stats.rx_bytes += len;
489
490 } while ( --rcv_count );
491
492 return len; /* 0 = nothing left to read, otherwise, we can try again */
493}
494
495/*
496 * Interrupt handler (Yes, we can do it too !!!)
497 */
498static irqreturn_t
499simeth_interrupt(int irq, void *dev_id, struct pt_regs * regs)
500{
501 struct net_device *dev = dev_id;
502
503 if ( dev == NULL ) {
504 printk(KERN_WARNING "simeth: irq %d for unknown device\n", irq);
505 return IRQ_NONE;
506 }
507
508 /*
509 * very simple loop because we get interrupts only when receiving
510 */
511 while (simeth_rx(dev));
512 return IRQ_HANDLED;
513}
514
515static struct net_device_stats *
516simeth_get_stats(struct net_device *dev)
517{
518 struct simeth_local *local = dev->priv;
519
520 return &local->stats;
521}
522
523/* fake multicast ability */
524static void
525set_multicast_list(struct net_device *dev)
526{
527 printk(KERN_WARNING "%s: set_multicast_list called\n", dev->name);
528}
529
530__initcall(simeth_probe);
diff --git a/arch/ia64/hp/sim/simscsi.c b/arch/ia64/hp/sim/simscsi.c
new file mode 100644
index 000000000000..56405dbfd739
--- /dev/null
+++ b/arch/ia64/hp/sim/simscsi.c
@@ -0,0 +1,404 @@
1/*
2 * Simulated SCSI driver.
3 *
4 * Copyright (C) 1999, 2001-2003 Hewlett-Packard Co
5 * David Mosberger-Tang <davidm@hpl.hp.com>
6 * Stephane Eranian <eranian@hpl.hp.com>
7 *
8 * 02/01/15 David Mosberger Updated for v2.5.1
9 * 99/12/18 David Mosberger Added support for READ10/WRITE10 needed by linux v2.3.33
10 */
11#include <linux/blkdev.h>
12#include <linux/init.h>
13#include <linux/interrupt.h>
14#include <linux/kernel.h>
15#include <linux/timer.h>
16#include <asm/irq.h>
17
18#include <scsi/scsi.h>
19#include <scsi/scsi_cmnd.h>
20#include <scsi/scsi_device.h>
21#include <scsi/scsi_host.h>
22
23#define DEBUG_SIMSCSI 0
24
25#define SIMSCSI_REQ_QUEUE_LEN 64
26#define DEFAULT_SIMSCSI_ROOT "/var/ski-disks/sd"
27
28/* Simulator system calls: */
29
30#define SSC_OPEN 50
31#define SSC_CLOSE 51
32#define SSC_READ 52
33#define SSC_WRITE 53
34#define SSC_GET_COMPLETION 54
35#define SSC_WAIT_COMPLETION 55
36
37#define SSC_WRITE_ACCESS 2
38#define SSC_READ_ACCESS 1
39
40#if DEBUG_SIMSCSI
41 int simscsi_debug;
42# define DBG simscsi_debug
43#else
44# define DBG 0
45#endif
46
47static struct Scsi_Host *host;
48
49static void simscsi_interrupt (unsigned long val);
50static DECLARE_TASKLET(simscsi_tasklet, simscsi_interrupt, 0);
51
52struct disk_req {
53 unsigned long addr;
54 unsigned len;
55};
56
57struct disk_stat {
58 int fd;
59 unsigned count;
60};
61
62extern long ia64_ssc (long arg0, long arg1, long arg2, long arg3, int nr);
63
64static int desc[16] = {
65 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
66};
67
68static struct queue_entry {
69 struct scsi_cmnd *sc;
70} queue[SIMSCSI_REQ_QUEUE_LEN];
71
72static int rd, wr;
73static atomic_t num_reqs = ATOMIC_INIT(0);
74
75/* base name for default disks */
76static char *simscsi_root = DEFAULT_SIMSCSI_ROOT;
77
78#define MAX_ROOT_LEN 128
79
80/*
81 * used to setup a new base for disk images
82 * to use /foo/bar/disk[a-z] as disk images
83 * you have to specify simscsi=/foo/bar/disk on the command line
84 */
85static int __init
86simscsi_setup (char *s)
87{
88 /* XXX Fix me we may need to strcpy() ? */
89 if (strlen(s) > MAX_ROOT_LEN) {
90 printk(KERN_ERR "simscsi_setup: prefix too long---using default %s\n",
91 simscsi_root);
92 }
93 simscsi_root = s;
94 return 1;
95}
96
97__setup("simscsi=", simscsi_setup);
98
99static void
100simscsi_interrupt (unsigned long val)
101{
102 struct scsi_cmnd *sc;
103
104 while ((sc = queue[rd].sc) != 0) {
105 atomic_dec(&num_reqs);
106 queue[rd].sc = 0;
107 if (DBG)
108 printk("simscsi_interrupt: done with %ld\n", sc->serial_number);
109 (*sc->scsi_done)(sc);
110 rd = (rd + 1) % SIMSCSI_REQ_QUEUE_LEN;
111 }
112}
113
114static int
115simscsi_biosparam (struct scsi_device *sdev, struct block_device *n,
116 sector_t capacity, int ip[])
117{
118 ip[0] = 64; /* heads */
119 ip[1] = 32; /* sectors */
120 ip[2] = capacity >> 11; /* cylinders */
121 return 0;
122}
123
124static void
125simscsi_readwrite (struct scsi_cmnd *sc, int mode, unsigned long offset, unsigned long len)
126{
127 struct disk_stat stat;
128 struct disk_req req;
129
130 req.addr = __pa(sc->request_buffer);
131 req.len = len; /* # of bytes to transfer */
132
133 if (sc->request_bufflen < req.len)
134 return;
135
136 stat.fd = desc[sc->device->id];
137 if (DBG)
138 printk("simscsi_%s @ %lx (off %lx)\n",
139 mode == SSC_READ ? "read":"write", req.addr, offset);
140 ia64_ssc(stat.fd, 1, __pa(&req), offset, mode);
141 ia64_ssc(__pa(&stat), 0, 0, 0, SSC_WAIT_COMPLETION);
142
143 if (stat.count == req.len) {
144 sc->result = GOOD;
145 } else {
146 sc->result = DID_ERROR << 16;
147 }
148}
149
150static void
151simscsi_sg_readwrite (struct scsi_cmnd *sc, int mode, unsigned long offset)
152{
153 int list_len = sc->use_sg;
154 struct scatterlist *sl = (struct scatterlist *)sc->buffer;
155 struct disk_stat stat;
156 struct disk_req req;
157
158 stat.fd = desc[sc->device->id];
159
160 while (list_len) {
161 req.addr = __pa(page_address(sl->page) + sl->offset);
162 req.len = sl->length;
163 if (DBG)
164 printk("simscsi_sg_%s @ %lx (off %lx) use_sg=%d len=%d\n",
165 mode == SSC_READ ? "read":"write", req.addr, offset,
166 list_len, sl->length);
167 ia64_ssc(stat.fd, 1, __pa(&req), offset, mode);
168 ia64_ssc(__pa(&stat), 0, 0, 0, SSC_WAIT_COMPLETION);
169
170 /* should not happen in our case */
171 if (stat.count != req.len) {
172 sc->result = DID_ERROR << 16;
173 return;
174 }
175 offset += sl->length;
176 sl++;
177 list_len--;
178 }
179 sc->result = GOOD;
180}
181
182/*
183 * function handling both READ_6/WRITE_6 (non-scatter/gather mode)
184 * commands.
185 * Added 02/26/99 S.Eranian
186 */
187static void
188simscsi_readwrite6 (struct scsi_cmnd *sc, int mode)
189{
190 unsigned long offset;
191
192 offset = (((sc->cmnd[1] & 0x1f) << 16) | (sc->cmnd[2] << 8) | sc->cmnd[3])*512;
193 if (sc->use_sg > 0)
194 simscsi_sg_readwrite(sc, mode, offset);
195 else
196 simscsi_readwrite(sc, mode, offset, sc->cmnd[4]*512);
197}
198
199static size_t
200simscsi_get_disk_size (int fd)
201{
202 struct disk_stat stat;
203 size_t bit, sectors = 0;
204 struct disk_req req;
205 char buf[512];
206
207 /*
208 * This is a bit kludgey: the simulator doesn't provide a direct way of determining
209 * the disk size, so we do a binary search, assuming a maximum disk size of 4GB.
210 */
211 for (bit = (4UL << 30)/512; bit != 0; bit >>= 1) {
212 req.addr = __pa(&buf);
213 req.len = sizeof(buf);
214 ia64_ssc(fd, 1, __pa(&req), ((sectors | bit) - 1)*512, SSC_READ);
215 stat.fd = fd;
216 ia64_ssc(__pa(&stat), 0, 0, 0, SSC_WAIT_COMPLETION);
217 if (stat.count == sizeof(buf))
218 sectors |= bit;
219 }
220 return sectors - 1; /* return last valid sector number */
221}
222
223static void
224simscsi_readwrite10 (struct scsi_cmnd *sc, int mode)
225{
226 unsigned long offset;
227
228 offset = ( (sc->cmnd[2] << 24) | (sc->cmnd[3] << 16)
229 | (sc->cmnd[4] << 8) | (sc->cmnd[5] << 0))*512;
230 if (sc->use_sg > 0)
231 simscsi_sg_readwrite(sc, mode, offset);
232 else
233 simscsi_readwrite(sc, mode, offset, ((sc->cmnd[7] << 8) | sc->cmnd[8])*512);
234}
235
236static int
237simscsi_queuecommand (struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
238{
239 unsigned int target_id = sc->device->id;
240 char fname[MAX_ROOT_LEN+16];
241 size_t disk_size;
242 char *buf;
243#if DEBUG_SIMSCSI
244 register long sp asm ("sp");
245
246 if (DBG)
247 printk("simscsi_queuecommand: target=%d,cmnd=%u,sc=%lu,sp=%lx,done=%p\n",
248 target_id, sc->cmnd[0], sc->serial_number, sp, done);
249#endif
250
251 sc->result = DID_BAD_TARGET << 16;
252 sc->scsi_done = done;
253 if (target_id <= 15 && sc->device->lun == 0) {
254 switch (sc->cmnd[0]) {
255 case INQUIRY:
256 if (sc->request_bufflen < 35) {
257 break;
258 }
259 sprintf (fname, "%s%c", simscsi_root, 'a' + target_id);
260 desc[target_id] = ia64_ssc(__pa(fname), SSC_READ_ACCESS|SSC_WRITE_ACCESS,
261 0, 0, SSC_OPEN);
262 if (desc[target_id] < 0) {
263 /* disk doesn't exist... */
264 break;
265 }
266 buf = sc->request_buffer;
267 buf[0] = 0; /* magnetic disk */
268 buf[1] = 0; /* not a removable medium */
269 buf[2] = 2; /* SCSI-2 compliant device */
270 buf[3] = 2; /* SCSI-2 response data format */
271 buf[4] = 31; /* additional length (bytes) */
272 buf[5] = 0; /* reserved */
273 buf[6] = 0; /* reserved */
274 buf[7] = 0; /* various flags */
275 memcpy(buf + 8, "HP SIMULATED DISK 0.00", 28);
276 sc->result = GOOD;
277 break;
278
279 case TEST_UNIT_READY:
280 sc->result = GOOD;
281 break;
282
283 case READ_6:
284 if (desc[target_id] < 0 )
285 break;
286 simscsi_readwrite6(sc, SSC_READ);
287 break;
288
289 case READ_10:
290 if (desc[target_id] < 0 )
291 break;
292 simscsi_readwrite10(sc, SSC_READ);
293 break;
294
295 case WRITE_6:
296 if (desc[target_id] < 0)
297 break;
298 simscsi_readwrite6(sc, SSC_WRITE);
299 break;
300
301 case WRITE_10:
302 if (desc[target_id] < 0)
303 break;
304 simscsi_readwrite10(sc, SSC_WRITE);
305 break;
306
307
308 case READ_CAPACITY:
309 if (desc[target_id] < 0 || sc->request_bufflen < 8) {
310 break;
311 }
312 buf = sc->request_buffer;
313
314 disk_size = simscsi_get_disk_size(desc[target_id]);
315
316 /* pretend to be a 1GB disk (partition table contains real stuff): */
317 buf[0] = (disk_size >> 24) & 0xff;
318 buf[1] = (disk_size >> 16) & 0xff;
319 buf[2] = (disk_size >> 8) & 0xff;
320 buf[3] = (disk_size >> 0) & 0xff;
321 /* set block size of 512 bytes: */
322 buf[4] = 0;
323 buf[5] = 0;
324 buf[6] = 2;
325 buf[7] = 0;
326 sc->result = GOOD;
327 break;
328
329 case MODE_SENSE:
330 case MODE_SENSE_10:
331 /* sd.c uses this to determine whether disk does write-caching. */
332 memset(sc->request_buffer, 0, 128);
333 sc->result = GOOD;
334 break;
335
336 case START_STOP:
337 printk(KERN_ERR "START_STOP\n");
338 break;
339
340 default:
341 panic("simscsi: unknown SCSI command %u\n", sc->cmnd[0]);
342 }
343 }
344 if (sc->result == DID_BAD_TARGET) {
345 sc->result |= DRIVER_SENSE << 24;
346 sc->sense_buffer[0] = 0x70;
347 sc->sense_buffer[2] = 0x00;
348 }
349 if (atomic_read(&num_reqs) >= SIMSCSI_REQ_QUEUE_LEN) {
350 panic("Attempt to queue command while command is pending!!");
351 }
352 atomic_inc(&num_reqs);
353 queue[wr].sc = sc;
354 wr = (wr + 1) % SIMSCSI_REQ_QUEUE_LEN;
355
356 tasklet_schedule(&simscsi_tasklet);
357 return 0;
358}
359
360static int
361simscsi_host_reset (struct scsi_cmnd *sc)
362{
363 printk(KERN_ERR "simscsi_host_reset: not implemented\n");
364 return 0;
365}
366
367static struct scsi_host_template driver_template = {
368 .name = "simulated SCSI host adapter",
369 .proc_name = "simscsi",
370 .queuecommand = simscsi_queuecommand,
371 .eh_host_reset_handler = simscsi_host_reset,
372 .bios_param = simscsi_biosparam,
373 .can_queue = SIMSCSI_REQ_QUEUE_LEN,
374 .this_id = -1,
375 .sg_tablesize = SG_ALL,
376 .max_sectors = 1024,
377 .cmd_per_lun = SIMSCSI_REQ_QUEUE_LEN,
378 .use_clustering = DISABLE_CLUSTERING,
379};
380
381static int __init
382simscsi_init(void)
383{
384 int error;
385
386 host = scsi_host_alloc(&driver_template, 0);
387 if (!host)
388 return -ENOMEM;
389
390 error = scsi_add_host(host, NULL);
391 if (!error)
392 scsi_scan_host(host);
393 return error;
394}
395
396static void __exit
397simscsi_exit(void)
398{
399 scsi_remove_host(host);
400 scsi_host_put(host);
401}
402
403module_init(simscsi_init);
404module_exit(simscsi_exit);
diff --git a/arch/ia64/hp/sim/simserial.c b/arch/ia64/hp/sim/simserial.c
new file mode 100644
index 000000000000..786e70718ce4
--- /dev/null
+++ b/arch/ia64/hp/sim/simserial.c
@@ -0,0 +1,1032 @@
1/*
2 * Simulated Serial Driver (fake serial)
3 *
4 * This driver is mostly used for bringup purposes and will go away.
5 * It has a strong dependency on the system console. All outputs
6 * are rerouted to the same facility as the one used by printk which, in our
7 * case means sys_sim.c console (goes via the simulator). The code hereafter
8 * is completely leveraged from the serial.c driver.
9 *
10 * Copyright (C) 1999-2000, 2002-2003 Hewlett-Packard Co
11 * Stephane Eranian <eranian@hpl.hp.com>
12 * David Mosberger-Tang <davidm@hpl.hp.com>
13 *
14 * 02/04/00 D. Mosberger Merged in serial.c bug fixes in rs_close().
15 * 02/25/00 D. Mosberger Synced up with 2.3.99pre-5 version of serial.c.
16 * 07/30/02 D. Mosberger Replace sti()/cli() with explicit spinlocks & local irq masking
17 */
18
19#include <linux/config.h>
20#include <linux/init.h>
21#include <linux/errno.h>
22#include <linux/sched.h>
23#include <linux/tty.h>
24#include <linux/tty_flip.h>
25#include <linux/major.h>
26#include <linux/fcntl.h>
27#include <linux/mm.h>
28#include <linux/slab.h>
29#include <linux/console.h>
30#include <linux/module.h>
31#include <linux/serial.h>
32#include <linux/serialP.h>
33
34#include <asm/irq.h>
35#include <asm/hw_irq.h>
36#include <asm/uaccess.h>
37
38#ifdef CONFIG_KDB
39# include <linux/kdb.h>
40#endif
41
42#undef SIMSERIAL_DEBUG /* define this to get some debug information */
43
44#define KEYBOARD_INTR 3 /* must match with simulator! */
45
46#define NR_PORTS 1 /* only one port for now */
47#define SERIAL_INLINE 1
48
49#ifdef SERIAL_INLINE
50#define _INLINE_ inline
51#endif
52
53#define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? SA_SHIRQ : SA_INTERRUPT)
54
55#define SSC_GETCHAR 21
56
57extern long ia64_ssc (long, long, long, long, int);
58extern void ia64_ssc_connect_irq (long intr, long irq);
59
60static char *serial_name = "SimSerial driver";
61static char *serial_version = "0.6";
62
63/*
64 * This has been extracted from asm/serial.h. We need one eventually but
65 * I don't know exactly what we're going to put in it so just fake one
66 * for now.
67 */
68#define BASE_BAUD ( 1843200 / 16 )
69
70#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST)
71
72/*
73 * Most of the values here are meaningless to this particular driver.
74 * However some values must be preserved for the code (leveraged from serial.c
75 * to work correctly).
76 * port must not be 0
77 * type must not be UNKNOWN
78 * So I picked arbitrary (guess from where?) values instead
79 */
80static struct serial_state rs_table[NR_PORTS]={
81 /* UART CLK PORT IRQ FLAGS */
82 { 0, BASE_BAUD, 0x3F8, 0, STD_COM_FLAGS,0,PORT_16550 } /* ttyS0 */
83};
84
85/*
86 * Just for the fun of it !
87 */
88static struct serial_uart_config uart_config[] = {
89 { "unknown", 1, 0 },
90 { "8250", 1, 0 },
91 { "16450", 1, 0 },
92 { "16550", 1, 0 },
93 { "16550A", 16, UART_CLEAR_FIFO | UART_USE_FIFO },
94 { "cirrus", 1, 0 },
95 { "ST16650", 1, UART_CLEAR_FIFO | UART_STARTECH },
96 { "ST16650V2", 32, UART_CLEAR_FIFO | UART_USE_FIFO |
97 UART_STARTECH },
98 { "TI16750", 64, UART_CLEAR_FIFO | UART_USE_FIFO},
99 { 0, 0}
100};
101
102struct tty_driver *hp_simserial_driver;
103
104static struct async_struct *IRQ_ports[NR_IRQS];
105
106static struct console *console;
107
108static unsigned char *tmp_buf;
109static DECLARE_MUTEX(tmp_buf_sem);
110
111extern struct console *console_drivers; /* from kernel/printk.c */
112
113/*
114 * ------------------------------------------------------------
115 * rs_stop() and rs_start()
116 *
117 * This routines are called before setting or resetting tty->stopped.
118 * They enable or disable transmitter interrupts, as necessary.
119 * ------------------------------------------------------------
120 */
121static void rs_stop(struct tty_struct *tty)
122{
123#ifdef SIMSERIAL_DEBUG
124 printk("rs_stop: tty->stopped=%d tty->hw_stopped=%d tty->flow_stopped=%d\n",
125 tty->stopped, tty->hw_stopped, tty->flow_stopped);
126#endif
127
128}
129
130static void rs_start(struct tty_struct *tty)
131{
132#if SIMSERIAL_DEBUG
133 printk("rs_start: tty->stopped=%d tty->hw_stopped=%d tty->flow_stopped=%d\n",
134 tty->stopped, tty->hw_stopped, tty->flow_stopped);
135#endif
136}
137
138static void receive_chars(struct tty_struct *tty, struct pt_regs *regs)
139{
140 unsigned char ch;
141 static unsigned char seen_esc = 0;
142
143 while ( (ch = ia64_ssc(0, 0, 0, 0, SSC_GETCHAR)) ) {
144 if ( ch == 27 && seen_esc == 0 ) {
145 seen_esc = 1;
146 continue;
147 } else {
148 if ( seen_esc==1 && ch == 'O' ) {
149 seen_esc = 2;
150 continue;
151 } else if ( seen_esc == 2 ) {
152 if ( ch == 'P' ) show_state(); /* F1 key */
153#ifdef CONFIG_KDB
154 if ( ch == 'S' )
155 kdb(KDB_REASON_KEYBOARD, 0, (kdb_eframe_t) regs);
156#endif
157
158 seen_esc = 0;
159 continue;
160 }
161 }
162 seen_esc = 0;
163 if (tty->flip.count >= TTY_FLIPBUF_SIZE) break;
164
165 *tty->flip.char_buf_ptr = ch;
166
167 *tty->flip.flag_buf_ptr = 0;
168
169 tty->flip.flag_buf_ptr++;
170 tty->flip.char_buf_ptr++;
171 tty->flip.count++;
172 }
173 tty_flip_buffer_push(tty);
174}
175
176/*
177 * This is the serial driver's interrupt routine for a single port
178 */
179static irqreturn_t rs_interrupt_single(int irq, void *dev_id, struct pt_regs * regs)
180{
181 struct async_struct * info;
182
183 /*
184 * I don't know exactly why they don't use the dev_id opaque data
185 * pointer instead of this extra lookup table
186 */
187 info = IRQ_ports[irq];
188 if (!info || !info->tty) {
189 printk(KERN_INFO "simrs_interrupt_single: info|tty=0 info=%p problem\n", info);
190 return IRQ_NONE;
191 }
192 /*
193 * pretty simple in our case, because we only get interrupts
194 * on inbound traffic
195 */
196 receive_chars(info->tty, regs);
197 return IRQ_HANDLED;
198}
199
200/*
201 * -------------------------------------------------------------------
202 * Here ends the serial interrupt routines.
203 * -------------------------------------------------------------------
204 */
205
206#if 0
207/*
208 * not really used in our situation so keep them commented out for now
209 */
210static DECLARE_TASK_QUEUE(tq_serial); /* used to be at the top of the file */
211static void do_serial_bh(void)
212{
213 run_task_queue(&tq_serial);
214 printk(KERN_ERR "do_serial_bh: called\n");
215}
216#endif
217
218static void do_softint(void *private_)
219{
220 printk(KERN_ERR "simserial: do_softint called\n");
221}
222
223static void rs_put_char(struct tty_struct *tty, unsigned char ch)
224{
225 struct async_struct *info = (struct async_struct *)tty->driver_data;
226 unsigned long flags;
227
228 if (!tty || !info->xmit.buf) return;
229
230 local_irq_save(flags);
231 if (CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE) == 0) {
232 local_irq_restore(flags);
233 return;
234 }
235 info->xmit.buf[info->xmit.head] = ch;
236 info->xmit.head = (info->xmit.head + 1) & (SERIAL_XMIT_SIZE-1);
237 local_irq_restore(flags);
238}
239
240static _INLINE_ void transmit_chars(struct async_struct *info, int *intr_done)
241{
242 int count;
243 unsigned long flags;
244
245
246 local_irq_save(flags);
247
248 if (info->x_char) {
249 char c = info->x_char;
250
251 console->write(console, &c, 1);
252
253 info->state->icount.tx++;
254 info->x_char = 0;
255
256 goto out;
257 }
258
259 if (info->xmit.head == info->xmit.tail || info->tty->stopped || info->tty->hw_stopped) {
260#ifdef SIMSERIAL_DEBUG
261 printk("transmit_chars: head=%d, tail=%d, stopped=%d\n",
262 info->xmit.head, info->xmit.tail, info->tty->stopped);
263#endif
264 goto out;
265 }
266 /*
267 * We removed the loop and try to do it in to chunks. We need
268 * 2 operations maximum because it's a ring buffer.
269 *
270 * First from current to tail if possible.
271 * Then from the beginning of the buffer until necessary
272 */
273
274 count = min(CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE),
275 SERIAL_XMIT_SIZE - info->xmit.tail);
276 console->write(console, info->xmit.buf+info->xmit.tail, count);
277
278 info->xmit.tail = (info->xmit.tail+count) & (SERIAL_XMIT_SIZE-1);
279
280 /*
281 * We have more at the beginning of the buffer
282 */
283 count = CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
284 if (count) {
285 console->write(console, info->xmit.buf, count);
286 info->xmit.tail += count;
287 }
288out:
289 local_irq_restore(flags);
290}
291
292static void rs_flush_chars(struct tty_struct *tty)
293{
294 struct async_struct *info = (struct async_struct *)tty->driver_data;
295
296 if (info->xmit.head == info->xmit.tail || tty->stopped || tty->hw_stopped ||
297 !info->xmit.buf)
298 return;
299
300 transmit_chars(info, NULL);
301}
302
303
304static int rs_write(struct tty_struct * tty,
305 const unsigned char *buf, int count)
306{
307 int c, ret = 0;
308 struct async_struct *info = (struct async_struct *)tty->driver_data;
309 unsigned long flags;
310
311 if (!tty || !info->xmit.buf || !tmp_buf) return 0;
312
313 local_irq_save(flags);
314 while (1) {
315 c = CIRC_SPACE_TO_END(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
316 if (count < c)
317 c = count;
318 if (c <= 0) {
319 break;
320 }
321 memcpy(info->xmit.buf + info->xmit.head, buf, c);
322 info->xmit.head = ((info->xmit.head + c) &
323 (SERIAL_XMIT_SIZE-1));
324 buf += c;
325 count -= c;
326 ret += c;
327 }
328 local_irq_restore(flags);
329 /*
330 * Hey, we transmit directly from here in our case
331 */
332 if (CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE)
333 && !tty->stopped && !tty->hw_stopped) {
334 transmit_chars(info, NULL);
335 }
336 return ret;
337}
338
339static int rs_write_room(struct tty_struct *tty)
340{
341 struct async_struct *info = (struct async_struct *)tty->driver_data;
342
343 return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
344}
345
346static int rs_chars_in_buffer(struct tty_struct *tty)
347{
348 struct async_struct *info = (struct async_struct *)tty->driver_data;
349
350 return CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
351}
352
353static void rs_flush_buffer(struct tty_struct *tty)
354{
355 struct async_struct *info = (struct async_struct *)tty->driver_data;
356 unsigned long flags;
357
358 local_irq_save(flags);
359 info->xmit.head = info->xmit.tail = 0;
360 local_irq_restore(flags);
361
362 wake_up_interruptible(&tty->write_wait);
363
364 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
365 tty->ldisc.write_wakeup)
366 (tty->ldisc.write_wakeup)(tty);
367}
368
369/*
370 * This function is used to send a high-priority XON/XOFF character to
371 * the device
372 */
373static void rs_send_xchar(struct tty_struct *tty, char ch)
374{
375 struct async_struct *info = (struct async_struct *)tty->driver_data;
376
377 info->x_char = ch;
378 if (ch) {
379 /*
380 * I guess we could call console->write() directly but
381 * let's do that for now.
382 */
383 transmit_chars(info, NULL);
384 }
385}
386
387/*
388 * ------------------------------------------------------------
389 * rs_throttle()
390 *
391 * This routine is called by the upper-layer tty layer to signal that
392 * incoming characters should be throttled.
393 * ------------------------------------------------------------
394 */
395static void rs_throttle(struct tty_struct * tty)
396{
397 if (I_IXOFF(tty)) rs_send_xchar(tty, STOP_CHAR(tty));
398
399 printk(KERN_INFO "simrs_throttle called\n");
400}
401
402static void rs_unthrottle(struct tty_struct * tty)
403{
404 struct async_struct *info = (struct async_struct *)tty->driver_data;
405
406 if (I_IXOFF(tty)) {
407 if (info->x_char)
408 info->x_char = 0;
409 else
410 rs_send_xchar(tty, START_CHAR(tty));
411 }
412 printk(KERN_INFO "simrs_unthrottle called\n");
413}
414
415/*
416 * rs_break() --- routine which turns the break handling on or off
417 */
418static void rs_break(struct tty_struct *tty, int break_state)
419{
420}
421
422static int rs_ioctl(struct tty_struct *tty, struct file * file,
423 unsigned int cmd, unsigned long arg)
424{
425 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
426 (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) &&
427 (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
428 if (tty->flags & (1 << TTY_IO_ERROR))
429 return -EIO;
430 }
431
432 switch (cmd) {
433 case TIOCMGET:
434 printk(KERN_INFO "rs_ioctl: TIOCMGET called\n");
435 return -EINVAL;
436 case TIOCMBIS:
437 case TIOCMBIC:
438 case TIOCMSET:
439 printk(KERN_INFO "rs_ioctl: TIOCMBIS/BIC/SET called\n");
440 return -EINVAL;
441 case TIOCGSERIAL:
442 printk(KERN_INFO "simrs_ioctl TIOCGSERIAL called\n");
443 return 0;
444 case TIOCSSERIAL:
445 printk(KERN_INFO "simrs_ioctl TIOCSSERIAL called\n");
446 return 0;
447 case TIOCSERCONFIG:
448 printk(KERN_INFO "rs_ioctl: TIOCSERCONFIG called\n");
449 return -EINVAL;
450
451 case TIOCSERGETLSR: /* Get line status register */
452 printk(KERN_INFO "rs_ioctl: TIOCSERGETLSR called\n");
453 return -EINVAL;
454
455 case TIOCSERGSTRUCT:
456 printk(KERN_INFO "rs_ioctl: TIOCSERGSTRUCT called\n");
457#if 0
458 if (copy_to_user((struct async_struct *) arg,
459 info, sizeof(struct async_struct)))
460 return -EFAULT;
461#endif
462 return 0;
463
464 /*
465 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
466 * - mask passed in arg for lines of interest
467 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
468 * Caller should use TIOCGICOUNT to see which one it was
469 */
470 case TIOCMIWAIT:
471 printk(KERN_INFO "rs_ioctl: TIOCMIWAIT: called\n");
472 return 0;
473 /*
474 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
475 * Return: write counters to the user passed counter struct
476 * NB: both 1->0 and 0->1 transitions are counted except for
477 * RI where only 0->1 is counted.
478 */
479 case TIOCGICOUNT:
480 printk(KERN_INFO "rs_ioctl: TIOCGICOUNT called\n");
481 return 0;
482
483 case TIOCSERGWILD:
484 case TIOCSERSWILD:
485 /* "setserial -W" is called in Debian boot */
486 printk (KERN_INFO "TIOCSER?WILD ioctl obsolete, ignored.\n");
487 return 0;
488
489 default:
490 return -ENOIOCTLCMD;
491 }
492 return 0;
493}
494
495#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
496
497static void rs_set_termios(struct tty_struct *tty, struct termios *old_termios)
498{
499 unsigned int cflag = tty->termios->c_cflag;
500
501 if ( (cflag == old_termios->c_cflag)
502 && ( RELEVANT_IFLAG(tty->termios->c_iflag)
503 == RELEVANT_IFLAG(old_termios->c_iflag)))
504 return;
505
506
507 /* Handle turning off CRTSCTS */
508 if ((old_termios->c_cflag & CRTSCTS) &&
509 !(tty->termios->c_cflag & CRTSCTS)) {
510 tty->hw_stopped = 0;
511 rs_start(tty);
512 }
513}
514/*
515 * This routine will shutdown a serial port; interrupts are disabled, and
516 * DTR is dropped if the hangup on close termio flag is on.
517 */
518static void shutdown(struct async_struct * info)
519{
520 unsigned long flags;
521 struct serial_state *state;
522 int retval;
523
524 if (!(info->flags & ASYNC_INITIALIZED)) return;
525
526 state = info->state;
527
528#ifdef SIMSERIAL_DEBUG
529 printk("Shutting down serial port %d (irq %d)....", info->line,
530 state->irq);
531#endif
532
533 local_irq_save(flags);
534 {
535 /*
536 * First unlink the serial port from the IRQ chain...
537 */
538 if (info->next_port)
539 info->next_port->prev_port = info->prev_port;
540 if (info->prev_port)
541 info->prev_port->next_port = info->next_port;
542 else
543 IRQ_ports[state->irq] = info->next_port;
544
545 /*
546 * Free the IRQ, if necessary
547 */
548 if (state->irq && (!IRQ_ports[state->irq] ||
549 !IRQ_ports[state->irq]->next_port)) {
550 if (IRQ_ports[state->irq]) {
551 free_irq(state->irq, NULL);
552 retval = request_irq(state->irq, rs_interrupt_single,
553 IRQ_T(info), "serial", NULL);
554
555 if (retval)
556 printk(KERN_ERR "serial shutdown: request_irq: error %d"
557 " Couldn't reacquire IRQ.\n", retval);
558 } else
559 free_irq(state->irq, NULL);
560 }
561
562 if (info->xmit.buf) {
563 free_page((unsigned long) info->xmit.buf);
564 info->xmit.buf = 0;
565 }
566
567 if (info->tty) set_bit(TTY_IO_ERROR, &info->tty->flags);
568
569 info->flags &= ~ASYNC_INITIALIZED;
570 }
571 local_irq_restore(flags);
572}
573
574/*
575 * ------------------------------------------------------------
576 * rs_close()
577 *
578 * This routine is called when the serial port gets closed. First, we
579 * wait for the last remaining data to be sent. Then, we unlink its
580 * async structure from the interrupt chain if necessary, and we free
581 * that IRQ if nothing is left in the chain.
582 * ------------------------------------------------------------
583 */
584static void rs_close(struct tty_struct *tty, struct file * filp)
585{
586 struct async_struct * info = (struct async_struct *)tty->driver_data;
587 struct serial_state *state;
588 unsigned long flags;
589
590 if (!info ) return;
591
592 state = info->state;
593
594 local_irq_save(flags);
595 if (tty_hung_up_p(filp)) {
596#ifdef SIMSERIAL_DEBUG
597 printk("rs_close: hung_up\n");
598#endif
599 local_irq_restore(flags);
600 return;
601 }
602#ifdef SIMSERIAL_DEBUG
603 printk("rs_close ttys%d, count = %d\n", info->line, state->count);
604#endif
605 if ((tty->count == 1) && (state->count != 1)) {
606 /*
607 * Uh, oh. tty->count is 1, which means that the tty
608 * structure will be freed. state->count should always
609 * be one in these conditions. If it's greater than
610 * one, we've got real problems, since it means the
611 * serial port won't be shutdown.
612 */
613 printk(KERN_ERR "rs_close: bad serial port count; tty->count is 1, "
614 "state->count is %d\n", state->count);
615 state->count = 1;
616 }
617 if (--state->count < 0) {
618 printk(KERN_ERR "rs_close: bad serial port count for ttys%d: %d\n",
619 info->line, state->count);
620 state->count = 0;
621 }
622 if (state->count) {
623 local_irq_restore(flags);
624 return;
625 }
626 info->flags |= ASYNC_CLOSING;
627 local_irq_restore(flags);
628
629 /*
630 * Now we wait for the transmit buffer to clear; and we notify
631 * the line discipline to only process XON/XOFF characters.
632 */
633 shutdown(info);
634 if (tty->driver->flush_buffer) tty->driver->flush_buffer(tty);
635 if (tty->ldisc.flush_buffer) tty->ldisc.flush_buffer(tty);
636 info->event = 0;
637 info->tty = 0;
638 if (info->blocked_open) {
639 if (info->close_delay) {
640 current->state = TASK_INTERRUPTIBLE;
641 schedule_timeout(info->close_delay);
642 }
643 wake_up_interruptible(&info->open_wait);
644 }
645 info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
646 wake_up_interruptible(&info->close_wait);
647}
648
649/*
650 * rs_wait_until_sent() --- wait until the transmitter is empty
651 */
652static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
653{
654}
655
656
657/*
658 * rs_hangup() --- called by tty_hangup() when a hangup is signaled.
659 */
660static void rs_hangup(struct tty_struct *tty)
661{
662 struct async_struct * info = (struct async_struct *)tty->driver_data;
663 struct serial_state *state = info->state;
664
665#ifdef SIMSERIAL_DEBUG
666 printk("rs_hangup: called\n");
667#endif
668
669 state = info->state;
670
671 rs_flush_buffer(tty);
672 if (info->flags & ASYNC_CLOSING)
673 return;
674 shutdown(info);
675
676 info->event = 0;
677 state->count = 0;
678 info->flags &= ~ASYNC_NORMAL_ACTIVE;
679 info->tty = 0;
680 wake_up_interruptible(&info->open_wait);
681}
682
683
684static int get_async_struct(int line, struct async_struct **ret_info)
685{
686 struct async_struct *info;
687 struct serial_state *sstate;
688
689 sstate = rs_table + line;
690 sstate->count++;
691 if (sstate->info) {
692 *ret_info = sstate->info;
693 return 0;
694 }
695 info = kmalloc(sizeof(struct async_struct), GFP_KERNEL);
696 if (!info) {
697 sstate->count--;
698 return -ENOMEM;
699 }
700 memset(info, 0, sizeof(struct async_struct));
701 init_waitqueue_head(&info->open_wait);
702 init_waitqueue_head(&info->close_wait);
703 init_waitqueue_head(&info->delta_msr_wait);
704 info->magic = SERIAL_MAGIC;
705 info->port = sstate->port;
706 info->flags = sstate->flags;
707 info->xmit_fifo_size = sstate->xmit_fifo_size;
708 info->line = line;
709 INIT_WORK(&info->work, do_softint, info);
710 info->state = sstate;
711 if (sstate->info) {
712 kfree(info);
713 *ret_info = sstate->info;
714 return 0;
715 }
716 *ret_info = sstate->info = info;
717 return 0;
718}
719
720static int
721startup(struct async_struct *info)
722{
723 unsigned long flags;
724 int retval=0;
725 irqreturn_t (*handler)(int, void *, struct pt_regs *);
726 struct serial_state *state= info->state;
727 unsigned long page;
728
729 page = get_zeroed_page(GFP_KERNEL);
730 if (!page)
731 return -ENOMEM;
732
733 local_irq_save(flags);
734
735 if (info->flags & ASYNC_INITIALIZED) {
736 free_page(page);
737 goto errout;
738 }
739
740 if (!state->port || !state->type) {
741 if (info->tty) set_bit(TTY_IO_ERROR, &info->tty->flags);
742 free_page(page);
743 goto errout;
744 }
745 if (info->xmit.buf)
746 free_page(page);
747 else
748 info->xmit.buf = (unsigned char *) page;
749
750#ifdef SIMSERIAL_DEBUG
751 printk("startup: ttys%d (irq %d)...", info->line, state->irq);
752#endif
753
754 /*
755 * Allocate the IRQ if necessary
756 */
757 if (state->irq && (!IRQ_ports[state->irq] ||
758 !IRQ_ports[state->irq]->next_port)) {
759 if (IRQ_ports[state->irq]) {
760 retval = -EBUSY;
761 goto errout;
762 } else
763 handler = rs_interrupt_single;
764
765 retval = request_irq(state->irq, handler, IRQ_T(info), "simserial", NULL);
766 if (retval) {
767 if (capable(CAP_SYS_ADMIN)) {
768 if (info->tty)
769 set_bit(TTY_IO_ERROR,
770 &info->tty->flags);
771 retval = 0;
772 }
773 goto errout;
774 }
775 }
776
777 /*
778 * Insert serial port into IRQ chain.
779 */
780 info->prev_port = 0;
781 info->next_port = IRQ_ports[state->irq];
782 if (info->next_port)
783 info->next_port->prev_port = info;
784 IRQ_ports[state->irq] = info;
785
786 if (info->tty) clear_bit(TTY_IO_ERROR, &info->tty->flags);
787
788 info->xmit.head = info->xmit.tail = 0;
789
790#if 0
791 /*
792 * Set up serial timers...
793 */
794 timer_table[RS_TIMER].expires = jiffies + 2*HZ/100;
795 timer_active |= 1 << RS_TIMER;
796#endif
797
798 /*
799 * Set up the tty->alt_speed kludge
800 */
801 if (info->tty) {
802 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
803 info->tty->alt_speed = 57600;
804 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
805 info->tty->alt_speed = 115200;
806 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
807 info->tty->alt_speed = 230400;
808 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
809 info->tty->alt_speed = 460800;
810 }
811
812 info->flags |= ASYNC_INITIALIZED;
813 local_irq_restore(flags);
814 return 0;
815
816errout:
817 local_irq_restore(flags);
818 return retval;
819}
820
821
822/*
823 * This routine is called whenever a serial port is opened. It
824 * enables interrupts for a serial port, linking in its async structure into
825 * the IRQ chain. It also performs the serial-specific
826 * initialization for the tty structure.
827 */
828static int rs_open(struct tty_struct *tty, struct file * filp)
829{
830 struct async_struct *info;
831 int retval, line;
832 unsigned long page;
833
834 line = tty->index;
835 if ((line < 0) || (line >= NR_PORTS))
836 return -ENODEV;
837 retval = get_async_struct(line, &info);
838 if (retval)
839 return retval;
840 tty->driver_data = info;
841 info->tty = tty;
842
843#ifdef SIMSERIAL_DEBUG
844 printk("rs_open %s, count = %d\n", tty->name, info->state->count);
845#endif
846 info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
847
848 if (!tmp_buf) {
849 page = get_zeroed_page(GFP_KERNEL);
850 if (!page)
851 return -ENOMEM;
852 if (tmp_buf)
853 free_page(page);
854 else
855 tmp_buf = (unsigned char *) page;
856 }
857
858 /*
859 * If the port is the middle of closing, bail out now
860 */
861 if (tty_hung_up_p(filp) ||
862 (info->flags & ASYNC_CLOSING)) {
863 if (info->flags & ASYNC_CLOSING)
864 interruptible_sleep_on(&info->close_wait);
865#ifdef SERIAL_DO_RESTART
866 return ((info->flags & ASYNC_HUP_NOTIFY) ?
867 -EAGAIN : -ERESTARTSYS);
868#else
869 return -EAGAIN;
870#endif
871 }
872
873 /*
874 * Start up serial port
875 */
876 retval = startup(info);
877 if (retval) {
878 return retval;
879 }
880
881 /*
882 * figure out which console to use (should be one already)
883 */
884 console = console_drivers;
885 while (console) {
886 if ((console->flags & CON_ENABLED) && console->write) break;
887 console = console->next;
888 }
889
890#ifdef SIMSERIAL_DEBUG
891 printk("rs_open ttys%d successful\n", info->line);
892#endif
893 return 0;
894}
895
896/*
897 * /proc fs routines....
898 */
899
900static inline int line_info(char *buf, struct serial_state *state)
901{
902 return sprintf(buf, "%d: uart:%s port:%lX irq:%d\n",
903 state->line, uart_config[state->type].name,
904 state->port, state->irq);
905}
906
907static int rs_read_proc(char *page, char **start, off_t off, int count,
908 int *eof, void *data)
909{
910 int i, len = 0, l;
911 off_t begin = 0;
912
913 len += sprintf(page, "simserinfo:1.0 driver:%s\n", serial_version);
914 for (i = 0; i < NR_PORTS && len < 4000; i++) {
915 l = line_info(page + len, &rs_table[i]);
916 len += l;
917 if (len+begin > off+count)
918 goto done;
919 if (len+begin < off) {
920 begin += len;
921 len = 0;
922 }
923 }
924 *eof = 1;
925done:
926 if (off >= len+begin)
927 return 0;
928 *start = page + (begin-off);
929 return ((count < begin+len-off) ? count : begin+len-off);
930}
931
932/*
933 * ---------------------------------------------------------------------
934 * rs_init() and friends
935 *
936 * rs_init() is called at boot-time to initialize the serial driver.
937 * ---------------------------------------------------------------------
938 */
939
940/*
941 * This routine prints out the appropriate serial driver version
942 * number, and identifies which options were configured into this
943 * driver.
944 */
945static inline void show_serial_version(void)
946{
947 printk(KERN_INFO "%s version %s with", serial_name, serial_version);
948 printk(KERN_INFO " no serial options enabled\n");
949}
950
951static struct tty_operations hp_ops = {
952 .open = rs_open,
953 .close = rs_close,
954 .write = rs_write,
955 .put_char = rs_put_char,
956 .flush_chars = rs_flush_chars,
957 .write_room = rs_write_room,
958 .chars_in_buffer = rs_chars_in_buffer,
959 .flush_buffer = rs_flush_buffer,
960 .ioctl = rs_ioctl,
961 .throttle = rs_throttle,
962 .unthrottle = rs_unthrottle,
963 .send_xchar = rs_send_xchar,
964 .set_termios = rs_set_termios,
965 .stop = rs_stop,
966 .start = rs_start,
967 .hangup = rs_hangup,
968 .break_ctl = rs_break,
969 .wait_until_sent = rs_wait_until_sent,
970 .read_proc = rs_read_proc,
971};
972
973/*
974 * The serial driver boot-time initialization code!
975 */
976static int __init
977simrs_init (void)
978{
979 int i;
980 struct serial_state *state;
981
982 if (!ia64_platform_is("hpsim"))
983 return -ENODEV;
984
985 hp_simserial_driver = alloc_tty_driver(1);
986 if (!hp_simserial_driver)
987 return -ENOMEM;
988
989 show_serial_version();
990
991 /* Initialize the tty_driver structure */
992
993 hp_simserial_driver->owner = THIS_MODULE;
994 hp_simserial_driver->driver_name = "simserial";
995 hp_simserial_driver->name = "ttyS";
996 hp_simserial_driver->major = TTY_MAJOR;
997 hp_simserial_driver->minor_start = 64;
998 hp_simserial_driver->type = TTY_DRIVER_TYPE_SERIAL;
999 hp_simserial_driver->subtype = SERIAL_TYPE_NORMAL;
1000 hp_simserial_driver->init_termios = tty_std_termios;
1001 hp_simserial_driver->init_termios.c_cflag =
1002 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
1003 hp_simserial_driver->flags = TTY_DRIVER_REAL_RAW;
1004 tty_set_operations(hp_simserial_driver, &hp_ops);
1005
1006 /*
1007 * Let's have a little bit of fun !
1008 */
1009 for (i = 0, state = rs_table; i < NR_PORTS; i++,state++) {
1010
1011 if (state->type == PORT_UNKNOWN) continue;
1012
1013 if (!state->irq) {
1014 state->irq = assign_irq_vector(AUTO_ASSIGN);
1015 ia64_ssc_connect_irq(KEYBOARD_INTR, state->irq);
1016 }
1017
1018 printk(KERN_INFO "ttyS%d at 0x%04lx (irq = %d) is a %s\n",
1019 state->line,
1020 state->port, state->irq,
1021 uart_config[state->type].name);
1022 }
1023
1024 if (tty_register_driver(hp_simserial_driver))
1025 panic("Couldn't register simserial driver\n");
1026
1027 return 0;
1028}
1029
1030#ifndef MODULE
1031__initcall(simrs_init);
1032#endif
diff --git a/arch/ia64/hp/zx1/Makefile b/arch/ia64/hp/zx1/Makefile
new file mode 100644
index 000000000000..61e878729d1e
--- /dev/null
+++ b/arch/ia64/hp/zx1/Makefile
@@ -0,0 +1,8 @@
1#
2# ia64/hp/zx1/Makefile
3#
4# Copyright (C) 2002 Hewlett Packard
5# Copyright (C) Alex Williamson (alex_williamson@hp.com)
6#
7
8obj-$(CONFIG_IA64_GENERIC) += hpzx1_machvec.o hpzx1_swiotlb_machvec.o
diff --git a/arch/ia64/hp/zx1/hpzx1_machvec.c b/arch/ia64/hp/zx1/hpzx1_machvec.c
new file mode 100644
index 000000000000..32518b0f923e
--- /dev/null
+++ b/arch/ia64/hp/zx1/hpzx1_machvec.c
@@ -0,0 +1,3 @@
1#define MACHVEC_PLATFORM_NAME hpzx1
2#define MACHVEC_PLATFORM_HEADER <asm/machvec_hpzx1.h>
3#include <asm/machvec_init.h>
diff --git a/arch/ia64/hp/zx1/hpzx1_swiotlb_machvec.c b/arch/ia64/hp/zx1/hpzx1_swiotlb_machvec.c
new file mode 100644
index 000000000000..4392a96b3c58
--- /dev/null
+++ b/arch/ia64/hp/zx1/hpzx1_swiotlb_machvec.c
@@ -0,0 +1,3 @@
1#define MACHVEC_PLATFORM_NAME hpzx1_swiotlb
2#define MACHVEC_PLATFORM_HEADER <asm/machvec_hpzx1_swiotlb.h>
3#include <asm/machvec_init.h>
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-03 11:57:44 -0500