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/dma-mapping.h>
11 #include <linux/ioport.h>
13 #include <asm/oplib.h>
14 #include <asm/iommu.h>
15 #include <asm/scatterlist.h>
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.
23 /* The base address at which to calculate device OBIO addresses. */
24 #define SUN_SBUS_BVADDR 0x00000000
25 #define SBUS_OFF_MASK 0x0fffffff
27 /* These routines are used to calculate device address from slot
28 * numbers + offsets, and vice versa.
31 static __inline__
unsigned long sbus_devaddr(int slotnum
, unsigned long offset
)
33 return (unsigned long) (SUN_SBUS_BVADDR
+((slotnum
)<<28)+(offset
));
36 static __inline__
int sbus_dev_slot(unsigned long dev_addr
)
38 return (int) (((dev_addr
)-SUN_SBUS_BVADDR
)>>28);
43 /* Linux SBUS device tables */
45 struct sbus_bus
*bus
; /* Our toplevel parent SBUS */
46 struct sbus_dev
*next
; /* Chain of siblings */
47 struct sbus_dev
*child
; /* Chain of children */
48 struct sbus_dev
*parent
;/* Parent device if not toplevel*/
49 int prom_node
; /* OBP node of this device */
50 char prom_name
[64]; /* OBP device name property */
51 int slot
; /* SBUS slot number */
53 struct resource resource
[PROMREG_MAX
];
55 struct linux_prom_registers reg_addrs
[PROMREG_MAX
];
56 int num_registers
, ranges_applied
;
58 struct linux_prom_ranges device_ranges
[PROMREG_MAX
];
59 int num_device_ranges
;
65 /* This struct describes the SBus(s) found on this machine. */
67 void *iommu
; /* Opaque IOMMU cookie */
68 struct sbus_dev
*devices
; /* Tree of SBUS devices */
69 struct sbus_bus
*next
; /* Next SBUS in system */
70 int prom_node
; /* OBP node of SBUS */
71 char prom_name
[64]; /* Usually "sbus" or "sbi" */
74 struct linux_prom_ranges sbus_ranges
[PROMREG_MAX
];
78 void *starfire_cookie
;
81 extern struct sbus_bus
*sbus_root
;
83 /* Device probing routines could find these handy */
84 #define for_each_sbus(bus) \
85 for((bus) = sbus_root; (bus); (bus)=(bus)->next)
87 #define for_each_sbusdev(device, bus) \
88 for((device) = (bus)->devices; (device); (device)=(device)->next)
90 #define for_all_sbusdev(device, bus) \
91 for ((bus) = sbus_root; (bus); (bus) = (bus)->next) \
92 for ((device) = (bus)->devices; (device); (device) = (device)->next)
94 /* Driver DVMA interfaces. */
95 #define sbus_can_dma_64bit(sdev) (1)
96 #define sbus_can_burst64(sdev) (1)
97 extern void sbus_set_sbus64(struct sbus_dev
*, int);
99 /* These yield IOMMU mappings in consistent mode. */
100 extern void *sbus_alloc_consistent(struct sbus_dev
*, size_t, dma_addr_t
*dma_addrp
);
101 extern void sbus_free_consistent(struct sbus_dev
*, size_t, void *, dma_addr_t
);
103 #define SBUS_DMA_BIDIRECTIONAL DMA_BIDIRECTIONAL
104 #define SBUS_DMA_TODEVICE DMA_TO_DEVICE
105 #define SBUS_DMA_FROMDEVICE DMA_FROM_DEVICE
106 #define SBUS_DMA_NONE DMA_NONE
108 /* All the rest use streaming mode mappings. */
109 extern dma_addr_t
sbus_map_single(struct sbus_dev
*, void *, size_t, int);
110 extern void sbus_unmap_single(struct sbus_dev
*, dma_addr_t
, size_t, int);
111 extern int sbus_map_sg(struct sbus_dev
*, struct scatterlist
*, int, int);
112 extern void sbus_unmap_sg(struct sbus_dev
*, struct scatterlist
*, int, int);
114 /* Finally, allow explicit synchronization of streamable mappings. */
115 extern void sbus_dma_sync_single_for_cpu(struct sbus_dev
*, dma_addr_t
, size_t, int);
116 #define sbus_dma_sync_single sbus_dma_sync_single_for_cpu
117 extern void sbus_dma_sync_single_for_device(struct sbus_dev
*, dma_addr_t
, size_t, int);
118 extern void sbus_dma_sync_sg_for_cpu(struct sbus_dev
*, struct scatterlist
*, int, int);
119 #define sbus_dma_sync_sg sbus_dma_sync_sg_for_cpu
120 extern void sbus_dma_sync_sg_for_device(struct sbus_dev
*, struct scatterlist
*, int, int);
122 #endif /* !(_SPARC64_SBUS_H) */