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
  20 void 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
  29 void 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
  38 void 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
  47 void 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
  56 void 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
  65 void 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 }