include/asm-arm/arch-l7200/io.h

   1 /*
   2  * linux/include/asm-arm/arch-l7200/io.h
   3  *
   4  * Copyright (C) 2000 Steve Hill (sjhill@cotw.com)
   5  *
   6  * Changelog:
   7  *  03-21-2000  SJH     Created from linux/include/asm-arm/arch-nexuspci/io.h
   8  *  08-31-2000  SJH     Added in IO functions necessary for new drivers
   9  */
  10 #ifndef __ASM_ARM_ARCH_IO_H
  11 #define __ASM_ARM_ARCH_IO_H
  12
  13 #include <asm/arch/hardware.h>
  14
  15 #define IO_SPACE_LIMIT 0xffffffff
  16
  17 /*
  18  * There are not real ISA nor PCI buses, so we fake it.
  19  */
  20 #define __io_pci(a)             ((void __iomem *)(PCIO_BASE + (a)))
  21 #define __mem_pci(a)            (a)
  22 #define __mem_isa(a)            (a)
  23
  24 #define __ioaddr(p)             __io_pci(p)
  25
  26 /*
  27  * Generic virtual read/write
  28  */
  29 #define __arch_getb(a)          (*(volatile unsigned char *)(a))
  30 #define __arch_getl(a)          (*(volatile unsigned int  *)(a))
  31
  32 static inline unsigned int __arch_getw(unsigned long a)
  33 {
  34         unsigned int value;
  35         __asm__ __volatile__("ldr%?h    %0, [%1, #0]    @ getw"
  36                 : "=&r" (value)
  37                 : "r" (a));
  38         return value;
  39 }
  40
  41 #define __arch_putb(v,a)        (*(volatile unsigned char *)(a) = (v))
  42 #define __arch_putl(v,a)        (*(volatile unsigned int  *)(a) = (v))
  43
  44 static inline void __arch_putw(unsigned int value, unsigned long a)
  45 {
  46         __asm__ __volatile__("str%?h    %0, [%1, #0]    @ putw"
  47                 : : "r" (value), "r" (a));
  48 }
  49
  50 /*
  51  * Translated address IO functions
  52  *
  53  * IO address has already been translated to a virtual address
  54  */
  55 #define outb_t(v,p)             (*(volatile unsigned char *)(p) = (v))
  56 #define inb_t(p)                (*(volatile unsigned char *)(p))
  57 #define outw_t(v,p)             (*(volatile unsigned int *)(p) = (v))
  58 #define inw_t(p)                (*(volatile unsigned int *)(p))
  59 #define outl_t(v,p)             (*(volatile unsigned long *)(p) = (v))
  60 #define inl_t(p)                (*(volatile unsigned long *)(p))
  61
  62 /*
  63  * FIXME - These are to allow for linking. On all the other
  64  *         ARM platforms, the entire IO space is contiguous.
  65  *         The 7200 has three separate IO spaces. The below
  66  *         macros will eventually become more involved. Use
  67  *         with caution and don't be surprised by kernel oopses!!!
  68  */
  69 #define inb(p)                  inb_t(p)
  70 #define inw(p)                  inw_t(p)
  71 #define inl(p)                  inl_t(p)
  72 #define outb(v,p)               outb_t(v,p)
  73 #define outw(v,p)               outw_t(v,p)
  74 #define outl(v,p)               outl_t(v,p)
  75
  76 #endif