include/asm-sparc64/sbus.h

   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/dma-mapping.h>
  11 #include <linux/ioport.h>
  12
  13 #include <asm/oplib.h>
  14 #include <asm/prom.h>
  15 #include <asm/of_device.h>
  16 #include <asm/iommu.h>
  17 #include <asm/scatterlist.h>
  18
  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.
  23  */
  24
  25 /* The base address at which to calculate device OBIO addresses. */
  26 #define SUN_SBUS_BVADDR        0x00000000
  27 #define SBUS_OFF_MASK          0x0fffffff
  28
  29 /* These routines are used to calculate device address from slot
  30  * numbers + offsets, and vice versa.
  31  */
  32
  33 static __inline__ unsigned long sbus_devaddr(int slotnum, unsigned long offset)
  34 {
  35   return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<28)+(offset));
  36 }
  37
  38 static __inline__ int sbus_dev_slot(unsigned long dev_addr)
  39 {
  40   return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>28);
  41 }
  42
  43 struct sbus_bus;
  44
  45 /* Linux SBUS device tables */
  46 struct sbus_dev {
  47         struct of_device        ofdev;
  48         struct sbus_bus         *bus;
  49         struct sbus_dev         *next;
  50         struct sbus_dev         *child;
  51         struct sbus_dev         *parent;
  52         int prom_node;
  53         char prom_name[64];
  54         int slot;
  55
  56         struct resource resource[PROMREG_MAX];
  57
  58         struct linux_prom_registers reg_addrs[PROMREG_MAX];
  59         int num_registers;
  60
  61         struct linux_prom_ranges device_ranges[PROMREG_MAX];
  62         int num_device_ranges;
  63
  64         unsigned int irqs[4];
  65         int num_irqs;
  66 };
  67 #define to_sbus_device(d) container_of(d, struct sbus_dev, ofdev.dev)
  68
  69 /* This struct describes the SBus(s) found on this machine. */
  70 struct sbus_bus {
  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" */
  77         int                     clock_freq;
  78
  79         struct linux_prom_ranges sbus_ranges[PROMREG_MAX];
  80         int num_sbus_ranges;
  81
  82         int portid;
  83 };
  84 #define to_sbus(d) container_of(d, struct sbus_bus, ofdev.dev)
  85
  86 extern struct sbus_bus *sbus_root;
  87
  88 /* Device probing routines could find these handy */
  89 #define for_each_sbus(bus) \
  90         for((bus) = sbus_root; (bus); (bus)=(bus)->next)
  91
  92 #define for_each_sbusdev(device, bus) \
  93         for((device) = (bus)->devices; (device); (device)=(device)->next)
  94
  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)
  98
  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 *);
 104
 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);
 108
 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
 113
 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);
 119
 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);
 127
 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);
 133
 134 #endif /* !(_SPARC64_SBUS_H) */