LXR linux/arch/h8300/boot/compressed/misc.c

   1/*
   2 * arch/h8300/boot/compressed/misc.c
   3 *
   4 * This is a collection of several routines from gzip-1.0.3
   5 * adapted for Linux.
   6 *
   7 * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
   8 *
   9 * Adapted for h8300 by Yoshinori Sato 2006
  10 */
  11
  12#include <asm/uaccess.h>
  13
  14/*
  15 * gzip declarations
  16 */
  17
  18#define OF(args)  args
  19#define STATIC static
  20
  21#undef memset
  22#undef memcpy
  23#define memzero(s, n)     memset((s), (0), (n))
  24
  25extern int _end;
  26static unsigned long free_mem_ptr;
  27static unsigned long free_mem_end_ptr;
  28
  29extern char input_data[];
  30extern int input_len;
  31extern char output[];
  32
  33#define HEAP_SIZE             0x10000
  34
  35#ifdef CONFIG_KERNEL_GZIP
  36#include "../../../../lib/decompress_inflate.c"
  37#endif
  38
  39#ifdef CONFIG_KERNEL_LZO
  40#include "../../../../lib/decompress_unlzo.c"
  41#endif
  42
  43void *memset(void *s, int c, size_t n)
  44{
  45        int i;
  46        char *ss = (char *)s;
  47
  48        for (i = 0; i < n; i++)
  49                ss[i] = c;
  50        return s;
  51}
  52
  53void *memcpy(void *dest, const void *src, size_t n)
  54{
  55        int i;
  56        char *d = (char *)dest, *s = (char *)src;
  57
  58        for (i = 0; i < n; i++)
  59                d[i] = s[i];
  60        return dest;
  61}
  62
  63static void error(char *x)
  64{
  65        while (1)
  66                ;       /* Halt */
  67}
  68
  69void decompress_kernel(void)
  70{
  71        free_mem_ptr = (unsigned long)&_end;
  72        free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
  73
  74        __decompress(input_data, input_len, NULL, NULL, output, 0, NULL, error);
  75}
  76