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-rw-r--r--include/asm-sparc64/sbus.h122
1 files changed, 122 insertions, 0 deletions
diff --git a/include/asm-sparc64/sbus.h b/include/asm-sparc64/sbus.h
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1/* $Id: sbus.h,v 1.14 2000/02/18 13:50:55 davem Exp $
2 * sbus.h: Defines for the Sun SBus.
3 *
4 * Copyright (C) 1996, 1999 David S. Miller (davem@redhat.com)
5 */
6
7#ifndef _SPARC64_SBUS_H
8#define _SPARC64_SBUS_H
9
10#include <linux/dma-mapping.h>
11#include <linux/ioport.h>
12
13#include <asm/oplib.h>
14#include <asm/iommu.h>
15#include <asm/scatterlist.h>
16
17/* We scan which devices are on the SBus using the PROM node device
18 * tree. SBus devices are described in two different ways. You can
19 * either get an absolute address at which to access the device, or
20 * you can get a SBus 'slot' number and an offset within that slot.
21 */
22
23/* The base address at which to calculate device OBIO addresses. */
24#define SUN_SBUS_BVADDR 0x00000000
25#define SBUS_OFF_MASK 0x0fffffff
26
27/* These routines are used to calculate device address from slot
28 * numbers + offsets, and vice versa.
29 */
30
31static __inline__ unsigned long sbus_devaddr(int slotnum, unsigned long offset)
32{
33 return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<28)+(offset));
34}
35
36static __inline__ int sbus_dev_slot(unsigned long dev_addr)
37{
38 return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>28);
39}
40
41struct sbus_bus;
42
43/* Linux SBUS device tables */
44struct sbus_dev {
45 struct sbus_bus *bus; /* Our toplevel parent SBUS */
46 struct sbus_dev *next; /* Chain of siblings */
47 struct sbus_dev *child; /* Chain of children */
48 struct sbus_dev *parent;/* Parent device if not toplevel*/
49 int prom_node; /* OBP node of this device */
50 char prom_name[64]; /* OBP device name property */
51 int slot; /* SBUS slot number */
52
53 struct resource resource[PROMREG_MAX];
54
55 struct linux_prom_registers reg_addrs[PROMREG_MAX];
56 int num_registers, ranges_applied;
57
58 struct linux_prom_ranges device_ranges[PROMREG_MAX];
59 int num_device_ranges;
60
61 unsigned int irqs[4];
62 int num_irqs;
63};
64
65/* This struct describes the SBus(s) found on this machine. */
66struct sbus_bus {
67 void *iommu; /* Opaque IOMMU cookie */
68 struct sbus_dev *devices; /* Tree of SBUS devices */
69 struct sbus_bus *next; /* Next SBUS in system */
70 int prom_node; /* OBP node of SBUS */
71 char prom_name[64]; /* Usually "sbus" or "sbi" */
72 int clock_freq;
73
74 struct linux_prom_ranges sbus_ranges[PROMREG_MAX];
75 int num_sbus_ranges;
76
77 int portid;
78 void *starfire_cookie;
79};
80
81extern struct sbus_bus *sbus_root;
82
83/* Device probing routines could find these handy */
84#define for_each_sbus(bus) \
85 for((bus) = sbus_root; (bus); (bus)=(bus)->next)
86
87#define for_each_sbusdev(device, bus) \
88 for((device) = (bus)->devices; (device); (device)=(device)->next)
89
90#define for_all_sbusdev(device, bus) \
91 for ((bus) = sbus_root; (bus); (bus) = (bus)->next) \
92 for ((device) = (bus)->devices; (device); (device) = (device)->next)
93
94/* Driver DVMA interfaces. */
95#define sbus_can_dma_64bit(sdev) (1)
96#define sbus_can_burst64(sdev) (1)
97extern void sbus_set_sbus64(struct sbus_dev *, int);
98
99/* These yield IOMMU mappings in consistent mode. */
100extern void *sbus_alloc_consistent(struct sbus_dev *, size_t, dma_addr_t *dma_addrp);
101extern void sbus_free_consistent(struct sbus_dev *, size_t, void *, dma_addr_t);
102
103#define SBUS_DMA_BIDIRECTIONAL DMA_BIDIRECTIONAL
104#define SBUS_DMA_TODEVICE DMA_TO_DEVICE
105#define SBUS_DMA_FROMDEVICE DMA_FROM_DEVICE
106#define SBUS_DMA_NONE DMA_NONE
107
108/* All the rest use streaming mode mappings. */
109extern dma_addr_t sbus_map_single(struct sbus_dev *, void *, size_t, int);
110extern void sbus_unmap_single(struct sbus_dev *, dma_addr_t, size_t, int);
111extern int sbus_map_sg(struct sbus_dev *, struct scatterlist *, int, int);
112extern void sbus_unmap_sg(struct sbus_dev *, struct scatterlist *, int, int);
113
114/* Finally, allow explicit synchronization of streamable mappings. */
115extern void sbus_dma_sync_single_for_cpu(struct sbus_dev *, dma_addr_t, size_t, int);
116#define sbus_dma_sync_single sbus_dma_sync_single_for_cpu
117extern void sbus_dma_sync_single_for_device(struct sbus_dev *, dma_addr_t, size_t, int);
118extern void sbus_dma_sync_sg_for_cpu(struct sbus_dev *, struct scatterlist *, int, int);
119#define sbus_dma_sync_sg sbus_dma_sync_sg_for_cpu
120extern void sbus_dma_sync_sg_for_device(struct sbus_dev *, struct scatterlist *, int, int);
121
122#endif /* !(_SPARC64_SBUS_H) */
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