arch/sparc/include/asm/sbus_64.h

   1 /* sbus.h: Defines for the Sun SBus.
   2  *
   3  * Copyright (C) 1996, 1999, 2007 David S. Miller (davem@davemloft.net)
   4  */
   5
   6 #ifndef _SPARC64_SBUS_H
   7 #define _SPARC64_SBUS_H
   8
   9 #include <linux/dma-mapping.h>
  10 #include <linux/ioport.h>
  11 #include <linux/of_device.h>
  12
  13 #include <asm/oplib.h>
  14 #include <asm/prom.h>
  15 #include <asm/iommu.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        0x00000000
  26 #define SBUS_OFF_MASK          0x0fffffff
  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)<<28)+(offset));
  35 }
  36
  37 static inline int sbus_dev_slot(unsigned long dev_addr)
  38 {
  39   return (int) (((dev_addr)-SUN_SBUS_BVADDR)>>28);
  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         struct sbus_dev         *devices;       /* Tree of SBUS devices */
  72         struct sbus_bus         *next;          /* Next SBUS in system  */
  73         int                     prom_node;      /* OBP node of SBUS     */
  74         char                    prom_name[64];  /* Usually "sbus" or "sbi" */
  75         int                     clock_freq;
  76
  77         struct linux_prom_ranges sbus_ranges[PROMREG_MAX];
  78         int num_sbus_ranges;
  79
  80         int portid;
  81 };
  82 #define to_sbus(d) container_of(d, struct sbus_bus, ofdev.dev)
  83
  84 extern struct sbus_bus *sbus_root;
  85
  86 /* Device probing routines could find these handy */
  87 #define for_each_sbus(bus) \
  88         for((bus) = sbus_root; (bus); (bus)=(bus)->next)
  89
  90 #define for_each_sbusdev(device, bus) \
  91         for((device) = (bus)->devices; (device); (device)=(device)->next)
  92
  93 #define for_all_sbusdev(device, bus) \
  94         for ((bus) = sbus_root; (bus); (bus) = (bus)->next) \
  95                 for ((device) = (bus)->devices; (device); (device) = (device)->next)
  96
  97 extern void sbus_fill_device_irq(struct sbus_dev *);
  98
  99 extern void sbus_arch_bus_ranges_init(struct device_node *, struct sbus_bus *);
 100 extern void sbus_setup_iommu(struct sbus_bus *, struct device_node *);
 101 extern void sbus_setup_arch_props(struct sbus_bus *, struct device_node *);
 102 extern int sbus_arch_preinit(void);
 103 extern void sbus_arch_postinit(void);
 104
 105 #endif /* !(_SPARC64_SBUS_H) */