LXR linux/arch/m32r/boot/compressed/misc.c

   1/*
   2 * arch/m32r/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 SH by Stuart Menefy, Aug 1999
  10 *
  11 * 2003-02-12:  Support M32R by Takeo Takahashi
  12 */
  13
  14/*
  15 * gzip declarations
  16 */
  17#define STATIC static
  18
  19#undef memset
  20#undef memcpy
  21#define memzero(s, n)     memset ((s), 0, (n))
  22
  23static void error(char *m);
  24
  25#include "m32r_sio.c"
  26
  27static unsigned long free_mem_ptr;
  28static unsigned long free_mem_end_ptr;
  29
  30#ifdef CONFIG_KERNEL_BZIP2
  31void *memset(void *s, int c, size_t n)
  32{
  33        char *ss = s;
  34
  35        while (n--)
  36                *ss++ = c;
  37        return s;
  38}
  39#endif
  40
  41#ifdef CONFIG_KERNEL_GZIP
  42void *memcpy(void *dest, const void *src, size_t n)
  43{
  44        char *d = dest;
  45        const char *s = src;
  46        while (n--)
  47                *d++ = *s++;
  48
  49        return dest;
  50}
  51
  52#define BOOT_HEAP_SIZE             0x10000
  53#include "../../../../lib/decompress_inflate.c"
  54#endif
  55
  56#ifdef CONFIG_KERNEL_BZIP2
  57#define BOOT_HEAP_SIZE             0x400000
  58#include "../../../../lib/decompress_bunzip2.c"
  59#endif
  60
  61#ifdef CONFIG_KERNEL_LZMA
  62#define BOOT_HEAP_SIZE             0x10000
  63#include "../../../../lib/decompress_unlzma.c"
  64#endif
  65
  66static void error(char *x)
  67{
  68        puts("\n\n");
  69        puts(x);
  70        puts("\n\n -- System halted");
  71
  72        while(1);       /* Halt */
  73}
  74
  75void
  76decompress_kernel(int mmu_on, unsigned char *zimage_data,
  77                  unsigned int zimage_len, unsigned long heap)
  78{
  79        unsigned char *input_data = zimage_data;
  80        int input_len = zimage_len;
  81        unsigned char *output_data;
  82
  83        output_data = (unsigned char *)CONFIG_MEMORY_START + 0x2000
  84                + (mmu_on ? 0x80000000 : 0);
  85        free_mem_ptr = heap;
  86        free_mem_end_ptr = free_mem_ptr + BOOT_HEAP_SIZE;
  87
  88        puts("\nDecompressing Linux... ");
  89        __decompress(input_data, input_len, NULL, NULL, output_data, 0,
  90                        NULL, error);
  91        puts("done.\nBooting the kernel.\n");
  92}
  93