LXR linux/arch/xtensa/kernel/io.c

   1/*
   2 * arch/xtensa/io.c
   3 *
   4 * IO primitives
   5 *
   6 * This program is free software; you can redistribute  it and/or modify it
   7 * under  the terms of  the GNU General  Public License as published by the
   8 * Free Software Foundation;  either version 2 of the  License, or (at your
   9 * option) any later version.
  10 *
  11 * Copied from sparc.
  12 *
  13 * Chris Zankel <chris@zankel.net>
  14 *
  15 */
  16
  17#include <asm/io.h>
  18#include <asm/byteorder.h>
  19
  20void outsb(unsigned long addr, const void *src, unsigned long count) {
  21        while (count) {
  22                count -= 1;
  23                writeb(*(const char *)src, addr);
  24                src += 1;
  25                addr += 1;
  26        }
  27}
  28
  29void outsw(unsigned long addr, const void *src, unsigned long count) {
  30        while (count) {
  31                count -= 2;
  32                writew(*(const short *)src, addr);
  33                src += 2;
  34                addr += 2;
  35        }
  36}
  37
  38void outsl(unsigned long addr, const void *src, unsigned long count) {
  39        while (count) {
  40                count -= 4;
  41                writel(*(const long *)src, addr);
  42                src += 4;
  43                addr += 4;
  44        }
  45}
  46
  47void insb(unsigned long addr, void *dst, unsigned long count) {
  48        while (count) {
  49                count -= 1;
  50                *(unsigned char *)dst = readb(addr);
  51                dst += 1;
  52                addr += 1;
  53        }
  54}
  55
  56void insw(unsigned long addr, void *dst, unsigned long count) {
  57        while (count) {
  58                count -= 2;
  59                *(unsigned short *)dst = readw(addr);
  60                dst += 2;
  61                addr += 2;
  62        }
  63}
  64
  65void insl(unsigned long addr, void *dst, unsigned long count) {
  66        while (count) {
  67                count -= 4;
  68                /*
  69                 * XXX I am sure we are in for an unaligned trap here.
  70                 */
  71                *(unsigned long *)dst = readl(addr);
  72                dst += 4;
  73                addr += 4;
  74        }
  75}
  76