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