include/asm-microblaze/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 #define IO_SPACE_LIMIT 0xFFFFFFFF
  20
  21 #define readb(addr) \
  22   ({ unsigned char __v = (*(volatile unsigned char *) (addr)); __v; })
  23 #define readw(addr) \
  24   ({ unsigned short __v = (*(volatile unsigned short *) (addr)); __v; })
  25 #define readl(addr) \
  26   ({ unsigned long __v = (*(volatile unsigned long *) (addr)); __v; })
  27
  28 #define writeb(b, addr) \
  29   (void)((*(volatile unsigned char *) (addr)) = (b))
  30 #define writew(b, addr) \
  31   (void)((*(volatile unsigned short *) (addr)) = (b))
  32 #define writel(b, addr) \
  33   (void)((*(volatile unsigned int *) (addr)) = (b))
  34
  35 #define memset_io(a,b,c)        memset((void *)(a),(b),(c))
  36 #define memcpy_fromio(a,b,c)    memcpy((a),(void *)(b),(c))
  37 #define memcpy_toio(a,b,c)      memcpy((void *)(a),(b),(c))
  38
  39 #define inb(addr)       readb (addr)
  40 #define inw(addr)       readw (addr)
  41 #define inl(addr)       readl (addr)
  42 #define outb(x, addr)   ((void) writeb (x, addr))
  43 #define outw(x, addr)   ((void) writew (x, addr))
  44 #define outl(x, addr)   ((void) writel (x, addr))
  45
  46 /* Some #definitions to keep strange Xilinx code happy */
  47 #define in_8(addr)      readb (addr)
  48 #define in_be16(addr)   readw (addr)
  49 #define in_be32(addr)   readl (addr)
  50
  51 #define out_8(addr,x )  outb (x,addr)
  52 #define out_be16(addr,x )       outw (x,addr)
  53 #define out_be32(addr,x )       outl (x,addr)
  54
  55
  56 #define inb_p(port)             inb((port))
  57 #define outb_p(val, port)       outb((val), (port))
  58 #define inw_p(port)             inw((port))
  59 #define outw_p(val, port)       outw((val), (port))
  60 #define inl_p(port)             inl((port))
  61 #define outl_p(val, port)       outl((val), (port))
  62
  63 /* Some defines to keep the MTD flash drivers happy */
  64
  65 #define __raw_readb readb
  66 #define __raw_readw readw
  67 #define __raw_readl readl
  68 #define __raw_writeb writeb
  69 #define __raw_writew writew
  70 #define __raw_writel writel
  71
  72 static inline void io_insb (unsigned long port, void *dst, unsigned long count)
  73 {
  74         unsigned char *p = dst;
  75         while (count--)
  76                 *p++ = inb (port);
  77 }
  78 static inline void io_insw (unsigned long port, void *dst, unsigned long count)
  79 {
  80         unsigned short *p = dst;
  81         while (count--)
  82                 *p++ = inw (port);
  83 }
  84 static inline void io_insl (unsigned long port, void *dst, unsigned long count)
  85 {
  86         unsigned long *p = dst;
  87         while (count--)
  88                 *p++ = inl (port);
  89 }
  90
  91 static inline void
  92 io_outsb (unsigned long port, const void *src, unsigned long count)
  93 {
  94         const unsigned char *p = src;
  95         while (count--)
  96                 outb (*p++, port);
  97 }
  98 static inline void
  99 io_outsw (unsigned long port, const void *src, unsigned long count)
 100 {
 101         const unsigned short *p = src;
 102         while (count--)
 103                 outw (*p++, port);
 104 }
 105 static inline void
 106 io_outsl (unsigned long port, const void *src, unsigned long count)
 107 {
 108         const unsigned long *p = src;
 109         while (count--)
 110                 outl (*p++, port);
 111 }
 112
 113 #define outsb(a,b,l) io_outsb(a,b,l)
 114 #define outsw(a,b,l) io_outsw(a,b,l)
 115 #define outsl(a,b,l) io_outsl(a,b,l)
 116
 117 #define insb(a,b,l) io_insb(a,b,l)
 118 #define insw(a,b,l) io_insw(a,b,l)
 119 #define insl(a,b,l) io_insl(a,b,l)
 120
 121
 122 #define iounmap(addr)                           ((void)0)
 123 #define ioremap(physaddr, size)                 (physaddr)
 124 #define ioremap_nocache(physaddr, size)         (physaddr)
 125 #define ioremap_writethrough(physaddr, size)    (physaddr)
 126 #define ioremap_fullcache(physaddr, size)       (physaddr)
 127
 128 static inline void sync(void)
 129 {
 130 }
 131
 132 /*
 133  * Given a physical address and a length, return a virtual address
 134  * that can be used to access the memory range with the caching
 135  * properties specified by "flags".
 136  */
 137 typedef unsigned long phys_addr_t;
 138
 139 #define MAP_NOCACHE     (0)
 140 #define MAP_WRCOMBINE   (0)
 141 #define MAP_WRBACK      (0)
 142 #define MAP_WRTHROUGH   (0)
 143
 144 static inline void *
 145 map_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  */
 153 static inline void unmap_physmem(void *vaddr, unsigned long flags)
 154 {
 155
 156 }
 157
 158 #endif /* __MICROBLAZE_IO_H__ */