1 /* $Id: sbus.h,v 1.14 2000/02/18 13:50:55 davem Exp $
2 * sbus.h: Defines for the Sun SBus.
4 * Copyright (C) 1996, 1999 David S. Miller (davem@redhat.com)
7 #ifndef _SPARC64_SBUS_H
8 #define _SPARC64_SBUS_H
10 #include <linux/ioport.h>
12 #include <asm/oplib.h>
13 #include <asm/iommu.h>
14 #include <asm/scatterlist.h>
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.
22 /* The base address at which to calculate device OBIO addresses. */
23 #define SUN_SBUS_BVADDR 0x00000000
24 #define SBUS_OFF_MASK 0x0fffffff
26 /* These routines are used to calculate device address from slot
27 * numbers + offsets, and vice versa.
30 static __inline__ unsigned long sbus_devaddr(int slotnum, unsigned long offset)
32 return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<28)+(offset));
35 static __inline__ int sbus_dev_slot(unsigned long dev_addr)
37 return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>28);
42 /* Linux SBUS device tables */
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 */
52 struct resource resource[PROMREG_MAX];
54 struct linux_prom_registers reg_addrs[PROMREG_MAX];
55 int num_registers, ranges_applied;
57 struct linux_prom_ranges device_ranges[PROMREG_MAX];
58 int num_device_ranges;
64 /* This struct describes the SBus(s) found on this machine. */
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" */
73 struct linux_prom_ranges sbus_ranges[PROMREG_MAX];
77 void *starfire_cookie;
80 extern struct sbus_bus *sbus_root;
82 /* Device probing routines could find these handy */
83 #define for_each_sbus(bus) \
84 for((bus) = sbus_root; (bus); (bus)=(bus)->next)
86 #define for_each_sbusdev(device, bus) \
87 for((device) = (bus)->devices; (device); (device)=(device)->next)
89 #define for_all_sbusdev(device, bus) \
90 for ((bus) = sbus_root; (bus); (bus) = (bus)->next) \
91 for ((device) = (bus)->devices; (device); (device) = (device)->next)
93 /* Driver DVMA interfaces. */
94 #define sbus_can_dma_64bit(sdev) (1)
95 #define sbus_can_burst64(sdev) (1)
96 extern void sbus_set_sbus64(struct sbus_dev *, int);
98 /* These yield IOMMU mappings in consistent mode. */
99 extern void *sbus_alloc_consistent(struct sbus_dev *, size_t, dma_addr_t *dma_addrp);
100 extern void sbus_free_consistent(struct sbus_dev *, size_t, void *, dma_addr_t);
102 #define SBUS_DMA_BIDIRECTIONAL 0
103 #define SBUS_DMA_TODEVICE 1
104 #define SBUS_DMA_FROMDEVICE 2
105 #define SBUS_DMA_NONE 3
107 /* All the rest use streaming mode mappings. */
108 extern dma_addr_t sbus_map_single(struct sbus_dev *, void *, size_t, int);
109 extern void sbus_unmap_single(struct sbus_dev *, dma_addr_t, size_t, int);
110 extern int sbus_map_sg(struct sbus_dev *, struct scatterlist *, int, int);
111 extern void sbus_unmap_sg(struct sbus_dev *, struct scatterlist *, int, int);
113 /* Finally, allow explicit synchronization of streamable mappings. */
114 extern void sbus_dma_sync_single_for_cpu(struct sbus_dev *, dma_addr_t, size_t, int);
115 #define sbus_dma_sync_single sbus_dma_sync_single_for_cpu
116 extern void sbus_dma_sync_single_for_device(struct sbus_dev *, dma_addr_t, size_t, int);
117 extern void sbus_dma_sync_sg_for_cpu(struct sbus_dev *, struct scatterlist *, int, int);
118 #define sbus_dma_sync_sg sbus_dma_sync_sg_for_cpu
119 extern void sbus_dma_sync_sg_for_device(struct sbus_dev *, struct scatterlist *, int, int);
121 #endif /* !(_SPARC64_SBUS_H) */