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 <linux/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
  25 extern int _end;
  26 static unsigned long free_mem_ptr;
  27 static unsigned long free_mem_end_ptr;
  28
  29 extern char input_data[];
  30 extern int input_len;
  31 extern 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
  43 void *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
  53 void *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
  63 static void error(char *x)
  64 {
  65         while (1)
  66                 ;       /* Halt */
  67 }
  68
  69 void 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 }