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>
15 #include <asm/of_device.h>
16 #include <asm/iommu.h>
17 #include <asm/scatterlist.h>
19 /* We scan which devices are on the SBus using the PROM node device
20 * tree. SBus devices are described in two different ways. You can
21 * either get an absolute address at which to access the device, or
22 * you can get a SBus 'slot' number and an offset within that slot.
25 /* The base address at which to calculate device OBIO addresses. */
26 #define SUN_SBUS_BVADDR 0x00000000
27 #define SBUS_OFF_MASK 0x0fffffff
29 /* These routines are used to calculate device address from slot
30 * numbers + offsets, and vice versa.
33 static __inline__ unsigned long sbus_devaddr(int slotnum, unsigned long offset)
35 return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<28)+(offset));
38 static __inline__ int sbus_dev_slot(unsigned long dev_addr)
40 return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>28);
45 /* Linux SBUS device tables */
47 struct of_device ofdev;
49 struct sbus_dev *next;
50 struct sbus_dev *child;
51 struct sbus_dev *parent;
56 struct resource resource[PROMREG_MAX];
58 struct linux_prom_registers reg_addrs[PROMREG_MAX];
61 struct linux_prom_ranges device_ranges[PROMREG_MAX];
62 int num_device_ranges;
67 #define to_sbus_device(d) container_of(d, struct sbus_dev, ofdev.dev)
69 /* This struct describes the SBus(s) found on this machine. */
71 struct of_device ofdev;
72 void *iommu; /* Opaque IOMMU cookie */
73 struct sbus_dev *devices; /* Tree of SBUS devices */
74 struct sbus_bus *next; /* Next SBUS in system */
75 int prom_node; /* OBP node of SBUS */
76 char prom_name[64]; /* Usually "sbus" or "sbi" */
79 struct linux_prom_ranges sbus_ranges[PROMREG_MAX];
84 #define to_sbus(d) container_of(d, struct sbus_bus, ofdev.dev)
86 extern struct sbus_bus *sbus_root;
88 /* Device probing routines could find these handy */
89 #define for_each_sbus(bus) \
90 for((bus) = sbus_root; (bus); (bus)=(bus)->next)
92 #define for_each_sbusdev(device, bus) \
93 for((device) = (bus)->devices; (device); (device)=(device)->next)
95 #define for_all_sbusdev(device, bus) \
96 for ((bus) = sbus_root; (bus); (bus) = (bus)->next) \
97 for ((device) = (bus)->devices; (device); (device) = (device)->next)
99 /* Driver DVMA interfaces. */
100 #define sbus_can_dma_64bit(sdev) (1)
101 #define sbus_can_burst64(sdev) (1)
102 extern void sbus_set_sbus64(struct sbus_dev *, int);
103 extern void sbus_fill_device_irq(struct sbus_dev *);
105 /* These yield IOMMU mappings in consistent mode. */
106 extern void *sbus_alloc_consistent(struct sbus_dev *, size_t, dma_addr_t *dma_addrp);
107 extern void sbus_free_consistent(struct sbus_dev *, size_t, void *, dma_addr_t);
109 #define SBUS_DMA_BIDIRECTIONAL DMA_BIDIRECTIONAL
110 #define SBUS_DMA_TODEVICE DMA_TO_DEVICE
111 #define SBUS_DMA_FROMDEVICE DMA_FROM_DEVICE
112 #define SBUS_DMA_NONE DMA_NONE
114 /* All the rest use streaming mode mappings. */
115 extern dma_addr_t sbus_map_single(struct sbus_dev *, void *, size_t, int);
116 extern void sbus_unmap_single(struct sbus_dev *, dma_addr_t, size_t, int);
117 extern int sbus_map_sg(struct sbus_dev *, struct scatterlist *, int, int);
118 extern void sbus_unmap_sg(struct sbus_dev *, struct scatterlist *, int, int);
120 /* Finally, allow explicit synchronization of streamable mappings. */
121 extern void sbus_dma_sync_single_for_cpu(struct sbus_dev *, dma_addr_t, size_t, int);
122 #define sbus_dma_sync_single sbus_dma_sync_single_for_cpu
123 extern void sbus_dma_sync_single_for_device(struct sbus_dev *, dma_addr_t, size_t, int);
124 extern void sbus_dma_sync_sg_for_cpu(struct sbus_dev *, struct scatterlist *, int, int);
125 #define sbus_dma_sync_sg sbus_dma_sync_sg_for_cpu
126 extern void sbus_dma_sync_sg_for_device(struct sbus_dev *, struct scatterlist *, int, int);
128 extern void sbus_arch_bus_ranges_init(struct device_node *, struct sbus_bus *);
129 extern void sbus_setup_iommu(struct sbus_bus *, struct device_node *);
130 extern void sbus_setup_arch_props(struct sbus_bus *, struct device_node *);
131 extern int sbus_arch_preinit(void);
132 extern void sbus_arch_postinit(void);
134 #endif /* !(_SPARC64_SBUS_H) */