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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/mips/sgi-ip27/ip27-init.c
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/mips/sgi-ip27/ip27-init.c')
-rw-r--r--arch/mips/sgi-ip27/ip27-init.c252
1 files changed, 252 insertions, 0 deletions
diff --git a/arch/mips/sgi-ip27/ip27-init.c b/arch/mips/sgi-ip27/ip27-init.c
new file mode 100644
index 000000000000..6dcee5c46c74
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@@ -0,0 +1,252 @@
1/*
2 * This file is subject to the terms and conditions of the GNU General
3 * Public License. See the file "COPYING" in the main directory of this
4 * archive for more details.
5 *
6 * Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
7 * Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
8 */
9#include <linux/config.h>
10#include <linux/kernel.h>
11#include <linux/init.h>
12#include <linux/sched.h>
13#include <linux/mm.h>
14#include <linux/module.h>
15#include <linux/cpumask.h>
16#include <asm/cpu.h>
17#include <asm/io.h>
18#include <asm/pgtable.h>
19#include <asm/time.h>
20#include <asm/sn/types.h>
21#include <asm/sn/sn0/addrs.h>
22#include <asm/sn/sn0/hubni.h>
23#include <asm/sn/sn0/hubio.h>
24#include <asm/sn/klconfig.h>
25#include <asm/sn/ioc3.h>
26#include <asm/mipsregs.h>
27#include <asm/sn/gda.h>
28#include <asm/sn/hub.h>
29#include <asm/sn/intr.h>
30#include <asm/current.h>
31#include <asm/smp.h>
32#include <asm/processor.h>
33#include <asm/mmu_context.h>
34#include <asm/thread_info.h>
35#include <asm/sn/launch.h>
36#include <asm/sn/sn_private.h>
37#include <asm/sn/sn0/ip27.h>
38#include <asm/sn/mapped_kernel.h>
39
40#define CPU_NONE (cpuid_t)-1
41
42static DECLARE_BITMAP(hub_init_mask, MAX_COMPACT_NODES);
43nasid_t master_nasid = INVALID_NASID;
44
45cnodeid_t nasid_to_compact_node[MAX_NASIDS];
46nasid_t compact_to_nasid_node[MAX_COMPACT_NODES];
47cnodeid_t cpuid_to_compact_node[MAXCPUS];
48
49EXPORT_SYMBOL(nasid_to_compact_node);
50
51extern void pcibr_setup(cnodeid_t);
52
53extern void xtalk_probe_node(cnodeid_t nid);
54
55static void __init per_hub_init(cnodeid_t cnode)
56{
57 struct hub_data *hub = hub_data(cnode);
58 nasid_t nasid = COMPACT_TO_NASID_NODEID(cnode);
59
60 cpu_set(smp_processor_id(), hub->h_cpus);
61
62 if (test_and_set_bit(cnode, hub_init_mask))
63 return;
64
65 /*
66 * Set CRB timeout at 5ms, (< PI timeout of 10ms)
67 */
68 REMOTE_HUB_S(nasid, IIO_ICTP, 0x800);
69 REMOTE_HUB_S(nasid, IIO_ICTO, 0xff);
70
71 hub_rtc_init(cnode);
72 xtalk_probe_node(cnode);
73
74#ifdef CONFIG_REPLICATE_EXHANDLERS
75 /*
76 * If this is not a headless node initialization,
77 * copy over the caliased exception handlers.
78 */
79 if (get_compact_nodeid() == cnode) {
80 extern char except_vec2_generic, except_vec3_generic;
81 extern void build_tlb_refill_handler(void);
82
83 memcpy((void *)(CKSEG0 + 0x100), &except_vec2_generic, 0x80);
84 memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x80);
85 build_tlb_refill_handler();
86 memcpy((void *)(CKSEG0 + 0x100), (void *) CKSEG0, 0x80);
87 memcpy((void *)(CKSEG0 + 0x180), &except_vec3_generic, 0x100);
88 __flush_cache_all();
89 }
90#endif
91}
92
93void __init per_cpu_init(void)
94{
95 int cpu = smp_processor_id();
96 int slice = LOCAL_HUB_L(PI_CPU_NUM);
97 cnodeid_t cnode = get_compact_nodeid();
98 struct hub_data *hub = hub_data(cnode);
99 struct slice_data *si = hub->slice + slice;
100 int i;
101
102 if (test_and_set_bit(slice, &hub->slice_map))
103 return;
104
105 clear_c0_status(ST0_IM);
106
107 for (i = 0; i < LEVELS_PER_SLICE; i++)
108 si->level_to_irq[i] = -1;
109
110 /*
111 * Some interrupts are reserved by hardware or by software convention.
112 * Mark these as reserved right away so they won't be used accidently
113 * later.
114 */
115 for (i = 0; i <= BASE_PCI_IRQ; i++) {
116 __set_bit(i, si->irq_alloc_mask);
117 LOCAL_HUB_S(PI_INT_PEND_MOD, i);
118 }
119
120 __set_bit(IP_PEND0_6_63, si->irq_alloc_mask);
121 LOCAL_HUB_S(PI_INT_PEND_MOD, IP_PEND0_6_63);
122
123 for (i = NI_BRDCAST_ERR_A; i <= MSC_PANIC_INTR; i++) {
124 __set_bit(i, si->irq_alloc_mask + 1);
125 LOCAL_HUB_S(PI_INT_PEND_MOD, i);
126 }
127
128 LOCAL_HUB_L(PI_INT_PEND0);
129
130 /*
131 * We use this so we can find the local hub's data as fast as only
132 * possible.
133 */
134 cpu_data[cpu].data = si;
135
136 cpu_time_init();
137 install_ipi();
138
139 /* Install our NMI handler if symmon hasn't installed one. */
140 install_cpu_nmi_handler(cputoslice(cpu));
141
142 set_c0_status(SRB_DEV0 | SRB_DEV1);
143
144 per_hub_init(cnode);
145}
146
147/*
148 * get_nasid() returns the physical node id number of the caller.
149 */
150nasid_t
151get_nasid(void)
152{
153 return (nasid_t)((LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_NODEID_MASK)
154 >> NSRI_NODEID_SHFT);
155}
156
157/*
158 * Map the physical node id to a virtual node id (virtual node ids are contiguous).
159 */
160cnodeid_t get_compact_nodeid(void)
161{
162 return NASID_TO_COMPACT_NODEID(get_nasid());
163}
164
165/* Extracted from the IOC3 meta driver. FIXME. */
166static inline void ioc3_sio_init(void)
167{
168 struct ioc3 *ioc3;
169 nasid_t nid;
170 long loops;
171
172 nid = get_nasid();
173 ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base;
174
175 ioc3->sscr_a = 0; /* PIO mode for uarta. */
176 ioc3->sscr_b = 0; /* PIO mode for uartb. */
177 ioc3->sio_iec = ~0;
178 ioc3->sio_ies = (SIO_IR_SA_INT | SIO_IR_SB_INT);
179
180 loops=1000000; while(loops--);
181 ioc3->sregs.uarta.iu_fcr = 0;
182 ioc3->sregs.uartb.iu_fcr = 0;
183 loops=1000000; while(loops--);
184}
185
186static inline void ioc3_eth_init(void)
187{
188 struct ioc3 *ioc3;
189 nasid_t nid;
190
191 nid = get_nasid();
192 ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base;
193
194 ioc3->eier = 0;
195}
196
197extern void ip27_setup_console(void);
198extern void ip27_time_init(void);
199extern void ip27_reboot_setup(void);
200
201static int __init ip27_setup(void)
202{
203 hubreg_t p, e, n_mode;
204 nasid_t nid;
205
206 ip27_setup_console();
207 ip27_reboot_setup();
208
209 /*
210 * hub_rtc init and cpu clock intr enabled for later calibrate_delay.
211 */
212 nid = get_nasid();
213 printk("IP27: Running on node %d.\n", nid);
214
215 p = LOCAL_HUB_L(PI_CPU_PRESENT_A) & 1;
216 e = LOCAL_HUB_L(PI_CPU_ENABLE_A) & 1;
217 printk("Node %d has %s primary CPU%s.\n", nid,
218 p ? "a" : "no",
219 e ? ", CPU is running" : "");
220
221 p = LOCAL_HUB_L(PI_CPU_PRESENT_B) & 1;
222 e = LOCAL_HUB_L(PI_CPU_ENABLE_B) & 1;
223 printk("Node %d has %s secondary CPU%s.\n", nid,
224 p ? "a" : "no",
225 e ? ", CPU is running" : "");
226
227 /*
228 * Try to catch kernel missconfigurations and give user an
229 * indication what option to select.
230 */
231 n_mode = LOCAL_HUB_L(NI_STATUS_REV_ID) & NSRI_MORENODES_MASK;
232 printk("Machine is in %c mode.\n", n_mode ? 'N' : 'M');
233#ifdef CONFIG_SGI_SN0_N_MODE
234 if (!n_mode)
235 panic("Kernel compiled for M mode.");
236#else
237 if (n_mode)
238 panic("Kernel compiled for N mode.");
239#endif
240
241 ioc3_sio_init();
242 ioc3_eth_init();
243 per_cpu_init();
244
245 set_io_port_base(IO_BASE);
246
247 board_time_init = ip27_time_init;
248
249 return 0;
250}
251
252early_initcall(ip27_setup);