LXR uboot/arch/microblaze/include/asm/io.h

   1/*
   2 * include/asm-microblaze/io.h -- Misc I/O operations
   3 *
   4 *  Copyright (C) 2003     John Williams <jwilliams@itee.uq.edu.au>
   5 *  Copyright (C) 2001,02  NEC Corporation
   6 *  Copyright (C) 2001,02  Miles Bader <miles@gnu.org>
   7 *
   8 * This file is subject to the terms and conditions of the GNU General
   9 * Public License.  See the file COPYING in the main directory of this
  10 * archive for more details.
  11 *
  12 * Written by Miles Bader <miles@gnu.org>
  13 * Microblaze port by John Williams
  14 */
  15
  16#ifndef __MICROBLAZE_IO_H__
  17#define __MICROBLAZE_IO_H__
  18
  19#include <asm/types.h>
  20
  21#define IO_SPACE_LIMIT 0xFFFFFFFF
  22
  23#define readb(addr) \
  24  ({ unsigned char __v = (*(volatile unsigned char *) (addr)); __v; })
  25#define readw(addr) \
  26  ({ unsigned short __v = (*(volatile unsigned short *) (addr)); __v; })
  27#define readl(addr) \
  28        ({ unsigned int __v = (*(volatile unsigned int *) (addr)); __v; })
  29
  30#define writeb(b, addr) \
  31  (void)((*(volatile unsigned char *) (addr)) = (b))
  32#define writew(b, addr) \
  33  (void)((*(volatile unsigned short *) (addr)) = (b))
  34#define writel(b, addr) \
  35  (void)((*(volatile unsigned int *) (addr)) = (b))
  36
  37#define memset_io(a,b,c)        memset((void *)(a),(b),(c))
  38#define memcpy_fromio(a,b,c)    memcpy((a),(void *)(b),(c))
  39#define memcpy_toio(a,b,c)      memcpy((void *)(a),(b),(c))
  40
  41#define inb(addr)       readb (addr)
  42#define inw(addr)       readw (addr)
  43#define inl(addr)       readl (addr)
  44#define outb(x, addr)   ((void) writeb (x, addr))
  45#define outw(x, addr)   ((void) writew (x, addr))
  46#define outl(x, addr)   ((void) writel (x, addr))
  47
  48/* Some #definitions to keep strange Xilinx code happy */
  49#define in_8(addr)      readb (addr)
  50#define in_be16(addr)   readw (addr)
  51#define in_be32(addr)   readl (addr)
  52
  53#define out_8(addr,x )  outb (x,addr)
  54#define out_be16(addr,x )       outw (x,addr)
  55#define out_be32(addr,x )       outl (x,addr)
  56
  57
  58#define inb_p(port)             inb((port))
  59#define outb_p(val, port)       outb((val), (port))
  60#define inw_p(port)             inw((port))
  61#define outw_p(val, port)       outw((val), (port))
  62#define inl_p(port)             inl((port))
  63#define outl_p(val, port)       outl((val), (port))
  64
  65/* Some defines to keep the MTD flash drivers happy */
  66
  67#define __raw_readb readb
  68#define __raw_readw readw
  69#define __raw_readl readl
  70#define __raw_writeb writeb
  71#define __raw_writew writew
  72#define __raw_writel writel
  73
  74static inline void io_insb (unsigned long port, void *dst, unsigned long count)
  75{
  76        unsigned char *p = dst;
  77        while (count--)
  78                *p++ = inb (port);
  79}
  80static inline void io_insw (unsigned long port, void *dst, unsigned long count)
  81{
  82        unsigned short *p = dst;
  83        while (count--)
  84                *p++ = inw (port);
  85}
  86static inline void io_insl (unsigned long port, void *dst, unsigned long count)
  87{
  88        unsigned long *p = dst;
  89        while (count--)
  90                *p++ = inl (port);
  91}
  92
  93static inline void
  94io_outsb (unsigned long port, const void *src, unsigned long count)
  95{
  96        const unsigned char *p = src;
  97        while (count--)
  98                outb (*p++, port);
  99}
 100static inline void
 101io_outsw (unsigned long port, const void *src, unsigned long count)
 102{
 103        const unsigned short *p = src;
 104        while (count--)
 105                outw (*p++, port);
 106}
 107static inline void
 108io_outsl (unsigned long port, const void *src, unsigned long count)
 109{
 110        const unsigned long *p = src;
 111        while (count--)
 112                outl (*p++, port);
 113}
 114
 115#define outsb(a,b,l) io_outsb(a,b,l)
 116#define outsw(a,b,l) io_outsw(a,b,l)
 117#define outsl(a,b,l) io_outsl(a,b,l)
 118
 119#define insb(a,b,l) io_insb(a,b,l)
 120#define insw(a,b,l) io_insw(a,b,l)
 121#define insl(a,b,l) io_insl(a,b,l)
 122
 123
 124#define iounmap(addr)                           ((void)0)
 125#define ioremap(physaddr, size)                 (physaddr)
 126#define ioremap_nocache(physaddr, size)         (physaddr)
 127#define ioremap_writethrough(physaddr, size)    (physaddr)
 128#define ioremap_fullcache(physaddr, size)       (physaddr)
 129
 130static inline void sync(void)
 131{
 132}
 133
 134/*
 135 * Given a physical address and a length, return a virtual address
 136 * that can be used to access the memory range with the caching
 137 * properties specified by "flags".
 138 */
 139#define MAP_NOCACHE     (0)
 140#define MAP_WRCOMBINE   (0)
 141#define MAP_WRBACK      (0)
 142#define MAP_WRTHROUGH   (0)
 143
 144static inline void *
 145map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
 146{
 147        return (void *)paddr;
 148}
 149
 150/*
 151 * Take down a mapping set up by map_physmem().
 152 */
 153static inline void unmap_physmem(void *vaddr, unsigned long flags)
 154{
 155
 156}
 157
 158static inline phys_addr_t virt_to_phys(void * vaddr)
 159{
 160        return (phys_addr_t)(vaddr);
 161}
 162
 163#endif /* __MICROBLAZE_IO_H__ */
 164