arch/h8300/boot/compressed/misc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * arch/h8300/boot/compressed/misc.c
   4  *
   5  * This is a collection of several routines from gzip-1.0.3
   6  * adapted for Linux.
   7  *
   8  * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
   9  *
  10  * Adapted for h8300 by Yoshinori Sato 2006
  11  */
  12
  13 #include <linux/uaccess.h>
  14
  15 /*
  16  * gzip declarations
  17  */
  18
  19 #define OF(args)  args
  20 #define STATIC static
  21
  22 #undef memset
  23 #undef memcpy
  24 #define memzero(s, n)     memset((s), (0), (n))
  25
  26 extern int _end;
  27 static unsigned long free_mem_ptr;
  28 static unsigned long free_mem_end_ptr;
  29
  30 extern char input_data[];
  31 extern int input_len;
  32 extern char output[];
  33
  34 #define HEAP_SIZE             0x10000
  35
  36 #ifdef CONFIG_KERNEL_GZIP
  37 #include "../../../../lib/decompress_inflate.c"
  38 #endif
  39
  40 #ifdef CONFIG_KERNEL_LZO
  41 #include "../../../../lib/decompress_unlzo.c"
  42 #endif
  43
  44 void *memset(void *s, int c, size_t n)
  45 {
  46         int i;
  47         char *ss = (char *)s;
  48
  49         for (i = 0; i < n; i++)
  50                 ss[i] = c;
  51         return s;
  52 }
  53
  54 void *memcpy(void *dest, const void *src, size_t n)
  55 {
  56         int i;
  57         char *d = (char *)dest, *s = (char *)src;
  58
  59         for (i = 0; i < n; i++)
  60                 d[i] = s[i];
  61         return dest;
  62 }
  63
  64 static void error(char *x)
  65 {
  66         while (1)
  67                 ;       /* Halt */
  68 }
  69
  70 void decompress_kernel(void)
  71 {
  72         free_mem_ptr = (unsigned long)&_end;
  73         free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
  74
  75         __decompress(input_data, input_len, NULL, NULL, output, 0, NULL, error);
  76 }