1 /* $Id: sbus.h,v 1.22 2000/02/18 13:50:50 davem Exp $
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/iommu.h> */ /* Unused since we use opaque iommu (|io-unit) */
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 0xf8000000
25 #define SBUS_OFF_MASK 0x01ffffff
26
27 /* These routines are used to calculate device address from slot
28 * numbers + offsets, and vice versa.
29 */
30
31 extern __inline__ unsigned long sbus_devaddr(int slotnum, unsigned long offset)
32 {
33 return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<25)+(offset));
34 }
35
36 extern __inline__ int sbus_dev_slot(unsigned long dev_addr)
37 {
38 return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>25);
39 }
40
41 struct sbus_bus;
42
43 /* Linux SBUS device tables */
44 struct sbus_dev {
45 struct sbus_bus *bus; /* Back ptr to sbus */
46 struct sbus_dev *next; /* next device on this SBus or null */
47 struct sbus_dev *child; /* For ledma and espdma on sun4m */
48 struct sbus_dev *parent; /* Parent device if not toplevel */
49 int prom_node; /* PROM device tree node for this device */
50 char prom_name[64]; /* PROM device name */
51 int slot;
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. */
66 struct sbus_bus {
67 void *iommu; /* Opaque IOMMU cookie */
68 struct sbus_dev *devices; /* Link to devices on this SBus */
69 struct sbus_bus *next; /* next SBus, if more than one SBus */
70 int prom_node; /* PROM device tree node for this 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 devid;
78 int board;
79 };
80
81 extern struct sbus_bus *sbus_root;
82
83 extern __inline__ int
84 sbus_is_slave(struct sbus_dev *dev)
85 {
86 /* XXX Have to write this for sun4c's */
87 return 0;
88 }
89
90 /* Device probing routines could find these handy */
91 #define for_each_sbus(bus) \
92 for((bus) = sbus_root; (bus); (bus)=(bus)->next)
93
94 #define for_each_sbusdev(device, bus) \
95 for((device) = (bus)->devices; (device); (device)=(device)->next)
96
97 #define for_all_sbusdev(device, bus) \
98 for ((bus) = sbus_root; (bus); (bus) = (bus)->next) \
99 for ((device) = (bus)->devices; (device); (device) = (device)->next)
100
101 /* Driver DVMA interfaces. */
102 #define sbus_can_dma_64bit(sdev) (0) /* actually, sparc_cpu_model==sun4d */
103 #define sbus_can_burst64(sdev) (0) /* actually, sparc_cpu_model==sun4d */
104 extern void sbus_set_sbus64(struct sbus_dev *, int);
105
106 /* These yield IOMMU mappings in consistent mode. */
107 extern void *sbus_alloc_consistent(struct sbus_dev *, long, u32 *dma_addrp);
108 extern void sbus_free_consistent(struct sbus_dev *, long, void *, u32);
109 void prom_adjust_ranges(struct linux_prom_ranges *, int,
110 struct linux_prom_ranges *, int);
111
112 #define SBUS_DMA_BIDIRECTIONAL DMA_BIDIRECTIONAL
113 #define SBUS_DMA_TODEVICE DMA_TO_DEVICE
114 #define SBUS_DMA_FROMDEVICE DMA_FROM_DEVICE
115 #define SBUS_DMA_NONE DMA_NONE
116
117 /* All the rest use streaming mode mappings. */
118 extern dma_addr_t sbus_map_single(struct sbus_dev *, void *, size_t, int);
119 extern void sbus_unmap_single(struct sbus_dev *, dma_addr_t, size_t, int);
120 extern int sbus_map_sg(struct sbus_dev *, struct scatterlist *, int, int);
121 extern void sbus_unmap_sg(struct sbus_dev *, struct scatterlist *, int, int);
122
123 /* Finally, allow explicit synchronization of streamable mappings. */
124 extern void sbus_dma_sync_single_for_cpu(struct sbus_dev *, dma_addr_t, size_t, int);
125 #define sbus_dma_sync_single sbus_dma_sync_single_for_cpu
126 extern void sbus_dma_sync_single_for_device(struct sbus_dev *, dma_addr_t, size_t, int);
127 extern void sbus_dma_sync_sg_for_cpu(struct sbus_dev *, struct scatterlist *, int, int);
128 #define sbus_dma_sync_sg sbus_dma_sync_sg_for_cpu
129 extern void sbus_dma_sync_sg_for_device(struct sbus_dev *, struct scatterlist *, int, int);
130
131 /* Eric Brower (ebrower@usa.net)
132 * Translate SBus interrupt levels to ino values--
133 * this is used when converting sbus "interrupts" OBP
134 * node values to "intr" node values, and is platform
135 * dependent. If only we could call OBP with
136 * "sbus-intr>cpu (sbint -- ino)" from kernel...
137 * See .../drivers/sbus/sbus.c for details.
138 */
139 BTFIXUPDEF_CALL(unsigned int, sbint_to_irq, struct sbus_dev *sdev, unsigned int)
140 #define sbint_to_irq(sdev, sbint) BTFIXUP_CALL(sbint_to_irq)(sdev, sbint)
141
142 #endif /* !(_SPARC_SBUS_H) */
143
|
This page was automatically generated by the
LXR engine.
|