include/asm-sparc/sbus.h

   1 /* $Id: sbus.h,v 1.22 2000/02/18 13:50:50 davem Exp $
   2  * sbus.h:  Defines for the Sun SBus.
   3  *
   4  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
   5  */
   6
   7 #ifndef _SPARC_SBUS_H
   8 #define _SPARC_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/scatterlist.h>
  17
  18 /* We scan which devices are on the SBus using the PROM node device
  19  * tree.  SBus devices are described in two different ways.  You can
  20  * either get an absolute address at which to access the device, or
  21  * you can get a SBus 'slot' number and an offset within that slot.
  22  */
  23
  24 /* The base address at which to calculate device OBIO addresses. */
  25 #define SUN_SBUS_BVADDR        0xf8000000
  26 #define SBUS_OFF_MASK          0x01ffffff
  27
  28 /* These routines are used to calculate device address from slot
  29  * numbers + offsets, and vice versa.
  30  */
  31
  32 static inline unsigned long sbus_devaddr(int slotnum, unsigned long offset)
  33 {
  34   return (unsigned long) (SUN_SBUS_BVADDR+((slotnum)<<25)+(offset));
  35 }
  36
  37 static inline int sbus_dev_slot(unsigned long dev_addr)
  38 {
  39   return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>25);
  40 }
  41
  42 struct sbus_bus;
  43
  44 /* Linux SBUS device tables */
  45 struct sbus_dev {
  46         struct of_device        ofdev;
  47         struct sbus_bus         *bus;
  48         struct sbus_dev         *next;
  49         struct sbus_dev         *child;
  50         struct sbus_dev         *parent;
  51         int prom_node;
  52         char prom_name[64];
  53         int slot;
  54
  55         struct resource resource[PROMREG_MAX];
  56
  57         struct linux_prom_registers reg_addrs[PROMREG_MAX];
  58         int num_registers;
  59
  60         struct linux_prom_ranges device_ranges[PROMREG_MAX];
  61         int num_device_ranges;
  62
  63         unsigned int irqs[4];
  64         int num_irqs;
  65 };
  66 #define to_sbus_device(d) container_of(d, struct sbus_dev, ofdev.dev)
  67
  68 /* This struct describes the SBus(s) found on this machine. */
  69 struct sbus_bus {
  70         struct of_device        ofdev;
  71         void                    *iommu;         /* Opaque IOMMU cookie */
  72         struct sbus_dev         *devices;       /* Link to devices on this SBus */
  73         struct sbus_bus         *next;          /* next SBus, if more than one SBus */
  74         int                     prom_node;      /* PROM device tree node for this SBus */
  75         char                    prom_name[64];  /* Usually "sbus" or "sbi" */
  76         int                     clock_freq;
  77
  78         struct linux_prom_ranges sbus_ranges[PROMREG_MAX];
  79         int num_sbus_ranges;
  80
  81         int devid;
  82         int board;
  83 };
  84 #define to_sbus(d) container_of(d, struct sbus_bus, ofdev.dev)
  85
  86 extern struct sbus_bus *sbus_root;
  87
  88 static inline int
  89 sbus_is_slave(struct sbus_dev *dev)
  90 {
  91         /* XXX Have to write this for sun4c's */
  92         return 0;
  93 }
  94
  95 /* Device probing routines could find these handy */
  96 #define for_each_sbus(bus) \
  97         for((bus) = sbus_root; (bus); (bus)=(bus)->next)
  98
  99 #define for_each_sbusdev(device, bus) \
 100         for((device) = (bus)->devices; (device); (device)=(device)->next)
 101
 102 #define for_all_sbusdev(device, bus) \
 103         for ((bus) = sbus_root; (bus); (bus) = (bus)->next) \
 104                 for ((device) = (bus)->devices; (device); (device) = (device)->next)
 105
 106 /* Driver DVMA interfaces. */
 107 #define sbus_can_dma_64bit(sdev)        (0) /* actually, sparc_cpu_model==sun4d */
 108 #define sbus_can_burst64(sdev)          (0) /* actually, sparc_cpu_model==sun4d */
 109 extern void sbus_set_sbus64(struct sbus_dev *, int);
 110 extern void sbus_fill_device_irq(struct sbus_dev *);
 111
 112 /* These yield IOMMU mappings in consistent mode. */
 113 extern void *sbus_alloc_consistent(struct sbus_dev *, long, u32 *dma_addrp);
 114 extern void sbus_free_consistent(struct sbus_dev *, long, void *, u32);
 115 void prom_adjust_ranges(struct linux_prom_ranges *, int,
 116                         struct linux_prom_ranges *, int);
 117
 118 #define SBUS_DMA_BIDIRECTIONAL  DMA_BIDIRECTIONAL
 119 #define SBUS_DMA_TODEVICE       DMA_TO_DEVICE
 120 #define SBUS_DMA_FROMDEVICE     DMA_FROM_DEVICE
 121 #define SBUS_DMA_NONE           DMA_NONE
 122
 123 /* All the rest use streaming mode mappings. */
 124 extern dma_addr_t sbus_map_single(struct sbus_dev *, void *, size_t, int);
 125 extern void sbus_unmap_single(struct sbus_dev *, dma_addr_t, size_t, int);
 126 extern int sbus_map_sg(struct sbus_dev *, struct scatterlist *, int, int);
 127 extern void sbus_unmap_sg(struct sbus_dev *, struct scatterlist *, int, int);
 128
 129 /* Finally, allow explicit synchronization of streamable mappings. */
 130 extern void sbus_dma_sync_single_for_cpu(struct sbus_dev *, dma_addr_t, size_t, int);
 131 #define sbus_dma_sync_single sbus_dma_sync_single_for_cpu
 132 extern void sbus_dma_sync_single_for_device(struct sbus_dev *, dma_addr_t, size_t, int);
 133 extern void sbus_dma_sync_sg_for_cpu(struct sbus_dev *, struct scatterlist *, int, int);
 134 #define sbus_dma_sync_sg sbus_dma_sync_sg_for_cpu
 135 extern void sbus_dma_sync_sg_for_device(struct sbus_dev *, struct scatterlist *, int, int);
 136
 137 /* Eric Brower (ebrower@usa.net)
 138  * Translate SBus interrupt levels to ino values--
 139  * this is used when converting sbus "interrupts" OBP
 140  * node values to "intr" node values, and is platform
 141  * dependent.  If only we could call OBP with
 142  * "sbus-intr>cpu (sbint -- ino)" from kernel...
 143  * See .../drivers/sbus/sbus.c for details.
 144  */
 145 BTFIXUPDEF_CALL(unsigned int, sbint_to_irq, struct sbus_dev *sdev, unsigned int)
 146 #define sbint_to_irq(sdev, sbint) BTFIXUP_CALL(sbint_to_irq)(sdev, sbint)
 147
 148 extern void sbus_arch_bus_ranges_init(struct device_node *, struct sbus_bus *);
 149 extern void sbus_setup_iommu(struct sbus_bus *, struct device_node *);
 150 extern void sbus_setup_arch_props(struct sbus_bus *, struct device_node *);
 151 extern int sbus_arch_preinit(void);
 152 extern void sbus_arch_postinit(void);
 153
 154 #endif /* !(_SPARC_SBUS_H) */