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-rw-r--r--include/asm-sparc/sbus_32.h153
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diff --git a/include/asm-sparc/sbus_32.h b/include/asm-sparc/sbus_32.h
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1/*
2 * sbus.h: Defines for the Sun SBus.
3 *
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 */
6
7#ifndef _SPARC_SBUS_H
8#define _SPARC_SBUS_H
9
10#include <linux/dma-mapping.h>
11#include <linux/ioport.h>
12
13#include <asm/oplib.h>
14#include <asm/prom.h>
15#include <asm/of_device.h>
16#include <asm/scatterlist.h>
17
18/* We scan which devices are on the SBus using the PROM node device
19 * tree. SBus devices are described in two different ways. You can
20 * either get an absolute address at which to access the device, or
21 * you can get a SBus 'slot' number and an offset within that slot.
22 */
23
24/* The base address at which to calculate device OBIO addresses. */
25#define SUN_SBUS_BVADDR 0xf8000000
26#define SBUS_OFF_MASK 0x01ffffff
27
28/* These routines are used to calculate device address from slot
29 * numbers + offsets, and vice versa.
30 */
31
32static inline unsigned long sbus_devaddr(int slotnum, unsigned long offset)
33{
34 return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<25)+(offset));
35}
36
37static inline int sbus_dev_slot(unsigned long dev_addr)
38{
39 return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>25);
40}
41
42struct sbus_bus;
43
44/* Linux SBUS device tables */
45struct sbus_dev {
46 struct of_device ofdev;
47 struct sbus_bus *bus;
48 struct sbus_dev *next;
49 struct sbus_dev *child;
50 struct sbus_dev *parent;
51 int prom_node;
52 char prom_name[64];
53 int slot;
54
55 struct resource resource[PROMREG_MAX];
56
57 struct linux_prom_registers reg_addrs[PROMREG_MAX];
58 int num_registers;
59
60 struct linux_prom_ranges device_ranges[PROMREG_MAX];
61 int num_device_ranges;
62
63 unsigned int irqs[4];
64 int num_irqs;
65};
66#define to_sbus_device(d) container_of(d, struct sbus_dev, ofdev.dev)
67
68/* This struct describes the SBus(s) found on this machine. */
69struct sbus_bus {
70 struct of_device ofdev;
71 struct sbus_dev *devices; /* Link to devices on this SBus */
72 struct sbus_bus *next; /* next SBus, if more than one SBus */
73 int prom_node; /* PROM device tree node for this SBus */
74 char prom_name[64]; /* Usually "sbus" or "sbi" */
75 int clock_freq;
76
77 struct linux_prom_ranges sbus_ranges[PROMREG_MAX];
78 int num_sbus_ranges;
79
80 int devid;
81 int board;
82};
83#define to_sbus(d) container_of(d, struct sbus_bus, ofdev.dev)
84
85extern struct sbus_bus *sbus_root;
86
87static inline int
88sbus_is_slave(struct sbus_dev *dev)
89{
90 /* XXX Have to write this for sun4c's */
91 return 0;
92}
93
94/* Device probing routines could find these handy */
95#define for_each_sbus(bus) \
96 for((bus) = sbus_root; (bus); (bus)=(bus)->next)
97
98#define for_each_sbusdev(device, bus) \
99 for((device) = (bus)->devices; (device); (device)=(device)->next)
100
101#define for_all_sbusdev(device, bus) \
102 for ((bus) = sbus_root; (bus); (bus) = (bus)->next) \
103 for ((device) = (bus)->devices; (device); (device) = (device)->next)
104
105/* Driver DVMA interfaces. */
106#define sbus_can_dma_64bit(sdev) (0) /* actually, sparc_cpu_model==sun4d */
107#define sbus_can_burst64(sdev) (0) /* actually, sparc_cpu_model==sun4d */
108extern void sbus_set_sbus64(struct sbus_dev *, int);
109extern void sbus_fill_device_irq(struct sbus_dev *);
110
111/* These yield IOMMU mappings in consistent mode. */
112extern void *sbus_alloc_consistent(struct sbus_dev *, long, u32 *dma_addrp);
113extern void sbus_free_consistent(struct sbus_dev *, long, void *, u32);
114void prom_adjust_ranges(struct linux_prom_ranges *, int,
115 struct linux_prom_ranges *, int);
116
117#define SBUS_DMA_BIDIRECTIONAL DMA_BIDIRECTIONAL
118#define SBUS_DMA_TODEVICE DMA_TO_DEVICE
119#define SBUS_DMA_FROMDEVICE DMA_FROM_DEVICE
120#define SBUS_DMA_NONE DMA_NONE
121
122/* All the rest use streaming mode mappings. */
123extern dma_addr_t sbus_map_single(struct sbus_dev *, void *, size_t, int);
124extern void sbus_unmap_single(struct sbus_dev *, dma_addr_t, size_t, int);
125extern int sbus_map_sg(struct sbus_dev *, struct scatterlist *, int, int);
126extern void sbus_unmap_sg(struct sbus_dev *, struct scatterlist *, int, int);
127
128/* Finally, allow explicit synchronization of streamable mappings. */
129extern void sbus_dma_sync_single_for_cpu(struct sbus_dev *, dma_addr_t, size_t, int);
130#define sbus_dma_sync_single sbus_dma_sync_single_for_cpu
131extern void sbus_dma_sync_single_for_device(struct sbus_dev *, dma_addr_t, size_t, int);
132extern void sbus_dma_sync_sg_for_cpu(struct sbus_dev *, struct scatterlist *, int, int);
133#define sbus_dma_sync_sg sbus_dma_sync_sg_for_cpu
134extern void sbus_dma_sync_sg_for_device(struct sbus_dev *, struct scatterlist *, int, int);
135
136/* Eric Brower (ebrower@usa.net)
137 * Translate SBus interrupt levels to ino values--
138 * this is used when converting sbus "interrupts" OBP
139 * node values to "intr" node values, and is platform
140 * dependent. If only we could call OBP with
141 * "sbus-intr>cpu (sbint -- ino)" from kernel...
142 * See .../drivers/sbus/sbus.c for details.
143 */
144BTFIXUPDEF_CALL(unsigned int, sbint_to_irq, struct sbus_dev *sdev, unsigned int)
145#define sbint_to_irq(sdev, sbint) BTFIXUP_CALL(sbint_to_irq)(sdev, sbint)
146
147extern void sbus_arch_bus_ranges_init(struct device_node *, struct sbus_bus *);
148extern void sbus_setup_iommu(struct sbus_bus *, struct device_node *);
149extern void sbus_setup_arch_props(struct sbus_bus *, struct device_node *);
150extern int sbus_arch_preinit(void);
151extern void sbus_arch_postinit(void);
152
153#endif /* !(_SPARC_SBUS_H) */
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