LXR uboot/arch/nios2/include/asm/io.h

   1/*
   2 * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
   3 * Scott McNutt <smcnutt@psyent.com>
   4 *
   5 * See file CREDITS for list of people who contributed to this
   6 * project.
   7 *
   8 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License as
  10 * published by the Free Software Foundation; either version 2 of
  11 * the License, or (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21 * MA 02111-1307 USA
  22 */
  23
  24#ifndef __ASM_NIOS2_IO_H_
  25#define __ASM_NIOS2_IO_H_
  26
  27static inline void sync(void)
  28{
  29        __asm__ __volatile__ ("sync" : : : "memory");
  30}
  31
  32/*
  33 * Given a physical address and a length, return a virtual address
  34 * that can be used to access the memory range with the caching
  35 * properties specified by "flags".
  36 */
  37#define MAP_NOCACHE     (0)
  38#define MAP_WRCOMBINE   (0)
  39#define MAP_WRBACK      (0)
  40#define MAP_WRTHROUGH   (0)
  41
  42static inline void *
  43map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
  44{
  45        return (void *)paddr;
  46}
  47
  48/*
  49 * Take down a mapping set up by map_physmem().
  50 */
  51static inline void unmap_physmem(void *vaddr, unsigned long flags)
  52{
  53
  54}
  55
  56static inline phys_addr_t virt_to_phys(void * vaddr)
  57{
  58        return (phys_addr_t)(vaddr);
  59}
  60
  61extern unsigned char inb (unsigned char *port);
  62extern unsigned short inw (unsigned short *port);
  63extern unsigned inl (unsigned port);
  64
  65#define __raw_writeb(v,a)       (*(volatile unsigned char  *)(a) = (v))
  66#define __raw_writew(v,a)       (*(volatile unsigned short *)(a) = (v))
  67#define __raw_writel(v,a)       (*(volatile unsigned int   *)(a) = (v))
  68
  69#define __raw_readb(a)          (*(volatile unsigned char  *)(a))
  70#define __raw_readw(a)          (*(volatile unsigned short *)(a))
  71#define __raw_readl(a)          (*(volatile unsigned int   *)(a))
  72
  73#define readb(addr)\
  74        ({unsigned char val;\
  75         asm volatile( "ldbio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;})
  76#define readw(addr)\
  77        ({unsigned short val;\
  78         asm volatile( "ldhio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;})
  79#define readl(addr)\
  80        ({unsigned long val;\
  81         asm volatile( "ldwio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;})
  82
  83#define writeb(val,addr)\
  84        asm volatile ("stbio %0, 0(%1)" : : "r" (val), "r" (addr))
  85#define writew(val,addr)\
  86        asm volatile ("sthio %0, 0(%1)" : : "r" (val), "r" (addr))
  87#define writel(val,addr)\
  88        asm volatile ("stwio %0, 0(%1)" : : "r" (val), "r" (addr))
  89
  90#define inb(addr)       readb(addr)
  91#define inw(addr)       readw(addr)
  92#define inl(addr)       readl(addr)
  93#define outb(val, addr) writeb(val,addr)
  94#define outw(val, addr) writew(val,addr)
  95#define outl(val, addr) writel(val,addr)
  96
  97static inline void insb (unsigned long port, void *dst, unsigned long count)
  98{
  99        unsigned char *p = dst;
 100        while (count--) *p++ = inb (port);
 101}
 102static inline void insw (unsigned long port, void *dst, unsigned long count)
 103{
 104        unsigned short *p = dst;
 105        while (count--) *p++ = inw (port);
 106}
 107static inline void insl (unsigned long port, void *dst, unsigned long count)
 108{
 109        unsigned long *p = dst;
 110        while (count--) *p++ = inl (port);
 111}
 112
 113static inline void outsb (unsigned long port, const void *src, unsigned long count)
 114{
 115        const unsigned char *p = src;
 116        while (count--) outb (*p++, port);
 117}
 118
 119static inline void outsw (unsigned long port, const void *src, unsigned long count)
 120{
 121        const unsigned short *p = src;
 122        while (count--) outw (*p++, port);
 123}
 124static inline void outsl (unsigned long port, const void *src, unsigned long count)
 125{
 126        const unsigned long *p = src;
 127        while (count--) outl (*p++, port);
 128}
 129
 130#endif /* __ASM_NIOS2_IO_H_ */
 131