summaryrefslogblamecommitdiff
path: root/include/asm-sparc/sbus.h
blob: 3a8b3908728ac40105335bb6d51273ec803cadd2 (plain) (tree) 
1da177e4c3f4














































































































































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142














































































































































                                                                                           
/* $Id: sbus.h,v 1.22 2000/02/18 13:50:50 davem Exp $
 * sbus.h:  Defines for the Sun SBus.
 *
 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 */

#ifndef _SPARC_SBUS_H
#define _SPARC_SBUS_H

#include <linux/dma-mapping.h>
#include <linux/ioport.h>

#include <asm/oplib.h>
/* #include <asm/iommu.h> */ /* Unused since we use opaque iommu (|io-unit) */
#include <asm/scatterlist.h>

/* We scan which devices are on the SBus using the PROM node device
 * tree.  SBus devices are described in two different ways.  You can
 * either get an absolute address at which to access the device, or
 * you can get a SBus 'slot' number and an offset within that slot.
 */

/* The base address at which to calculate device OBIO addresses. */
#define SUN_SBUS_BVADDR        0xf8000000
#define SBUS_OFF_MASK          0x01ffffff

/* These routines are used to calculate device address from slot
 * numbers + offsets, and vice versa.
 */

extern __inline__ unsigned long sbus_devaddr(int slotnum, unsigned long offset)
{
  return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<25)+(offset));
}

extern __inline__ int sbus_dev_slot(unsigned long dev_addr)
{
  return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>25);
}

struct sbus_bus;

/* Linux SBUS device tables */
struct sbus_dev {
	struct sbus_bus	*bus;       /* Back ptr to sbus */
	struct sbus_dev	*next;      /* next device on this SBus or null */
	struct sbus_dev	*child;     /* For ledma and espdma on sun4m */
	struct sbus_dev	*parent;    /* Parent device if not toplevel */
	int prom_node;              /* PROM device tree node for this device */
	char prom_name[64];         /* PROM device name */
	int slot;

	struct resource resource[PROMREG_MAX];

	struct linux_prom_registers reg_addrs[PROMREG_MAX];
	int num_registers, ranges_applied;

	struct linux_prom_ranges device_ranges[PROMREG_MAX];
	int num_device_ranges;

	unsigned int irqs[4];
	int num_irqs;
};

/* This struct describes the SBus(s) found on this machine. */
struct sbus_bus {
	void			*iommu;		/* Opaque IOMMU cookie */
	struct sbus_dev		*devices;	/* Link to devices on this SBus */
	struct sbus_bus		*next;		/* next SBus, if more than one SBus */
	int			prom_node;	/* PROM device tree node for this SBus */
	char			prom_name[64];  /* Usually "sbus" or "sbi" */
	int			clock_freq;

	struct linux_prom_ranges sbus_ranges[PROMREG_MAX];
	int num_sbus_ranges;

	int devid;
	int board;
};

extern struct sbus_bus *sbus_root;

extern __inline__ int
sbus_is_slave(struct sbus_dev *dev)
{
	/* XXX Have to write this for sun4c's */
	return 0;
}

/* Device probing routines could find these handy */
#define for_each_sbus(bus) \
        for((bus) = sbus_root; (bus); (bus)=(bus)->next)

#define for_each_sbusdev(device, bus) \
        for((device) = (bus)->devices; (device); (device)=(device)->next)
        
#define for_all_sbusdev(device, bus) \
	for ((bus) = sbus_root; (bus); (bus) = (bus)->next) \
		for ((device) = (bus)->devices; (device); (device) = (device)->next)

/* Driver DVMA interfaces. */
#define sbus_can_dma_64bit(sdev)	(0) /* actually, sparc_cpu_model==sun4d */
#define sbus_can_burst64(sdev)		(0) /* actually, sparc_cpu_model==sun4d */
extern void sbus_set_sbus64(struct sbus_dev *, int);

/* These yield IOMMU mappings in consistent mode. */
extern void *sbus_alloc_consistent(struct sbus_dev *, long, u32 *dma_addrp);
extern void sbus_free_consistent(struct sbus_dev *, long, void *, u32);
void prom_adjust_ranges(struct linux_prom_ranges *, int,
			struct linux_prom_ranges *, int);

#define SBUS_DMA_BIDIRECTIONAL	DMA_BIDIRECTIONAL
#define SBUS_DMA_TODEVICE	DMA_TO_DEVICE
#define SBUS_DMA_FROMDEVICE	DMA_FROM_DEVICE
#define	SBUS_DMA_NONE		DMA_NONE

/* All the rest use streaming mode mappings. */
extern dma_addr_t sbus_map_single(struct sbus_dev *, void *, size_t, int);
extern void sbus_unmap_single(struct sbus_dev *, dma_addr_t, size_t, int);
extern int sbus_map_sg(struct sbus_dev *, struct scatterlist *, int, int);
extern void sbus_unmap_sg(struct sbus_dev *, struct scatterlist *, int, int);

/* Finally, allow explicit synchronization of streamable mappings. */
extern void sbus_dma_sync_single_for_cpu(struct sbus_dev *, dma_addr_t, size_t, int);
#define sbus_dma_sync_single sbus_dma_sync_single_for_cpu
extern void sbus_dma_sync_single_for_device(struct sbus_dev *, dma_addr_t, size_t, int);
extern void sbus_dma_sync_sg_for_cpu(struct sbus_dev *, struct scatterlist *, int, int);
#define sbus_dma_sync_sg sbus_dma_sync_sg_for_cpu
extern void sbus_dma_sync_sg_for_device(struct sbus_dev *, struct scatterlist *, int, int);

/* Eric Brower (ebrower@usa.net)
 * Translate SBus interrupt levels to ino values--
 * this is used when converting sbus "interrupts" OBP 
 * node values to "intr" node values, and is platform 
 * dependent.  If only we could call OBP with 
 * "sbus-intr>cpu (sbint -- ino)" from kernel...
 * See .../drivers/sbus/sbus.c for details.
 */
BTFIXUPDEF_CALL(unsigned int, sbint_to_irq, struct sbus_dev *sdev, unsigned int)
#define sbint_to_irq(sdev, sbint) BTFIXUP_CALL(sbint_to_irq)(sdev, sbint)

#endif /* !(_SPARC_SBUS_H) */