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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 | /* $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/ioport.h> #include <asm/oplib.h> #include <asm/iommu.h> #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, ((device) = (bus) ? (bus)->devices : 0); (bus); (device)=((device)->next ? (device)->next : ((bus) = (bus)->next, (bus) ? (bus)->devices : 0))) /* 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); #define SBUS_DMA_BIDIRECTIONAL 0 #define SBUS_DMA_TODEVICE 1 #define SBUS_DMA_FROMDEVICE 2 #define SBUS_DMA_NONE 3 /* All the rest use streaming mode mappings. */ extern u32 sbus_map_single(struct sbus_dev *, void *, long, int); extern void sbus_unmap_single(struct sbus_dev *, u32, long, 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(struct sbus_dev *, u32, long, int); extern void sbus_dma_sync_sg(struct sbus_dev *, struct scatterlist *, int, int); #endif /* !(_SPARC_SBUS_H) */ |