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
  31static void *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
  42#define BOOT_HEAP_SIZE             0x10000
  43#include "../../../../lib/decompress_inflate.c"
  44#endif
  45
  46#ifdef CONFIG_KERNEL_BZIP2
  47#define BOOT_HEAP_SIZE             0x400000
  48#include "../../../../lib/decompress_bunzip2.c"
  49#endif
  50
  51#ifdef CONFIG_KERNEL_LZMA
  52#define BOOT_HEAP_SIZE             0x10000
  53#include "../../../../lib/decompress_unlzma.c"
  54#endif
  55
  56static void error(char *x)
  57{
  58        puts("\n\n");
  59        puts(x);
  60        puts("\n\n -- System halted");
  61
  62        while(1);       /* Halt */
  63}
  64
  65void
  66decompress_kernel(int mmu_on, unsigned char *zimage_data,
  67                  unsigned int zimage_len, unsigned long heap)
  68{
  69        unsigned char *input_data = zimage_data;
  70        int input_len = zimage_len;
  71        unsigned char *output_data;
  72
  73        output_data = (unsigned char *)CONFIG_MEMORY_START + 0x2000
  74                + (mmu_on ? 0x80000000 : 0);
  75        free_mem_ptr = heap;
  76        free_mem_end_ptr = free_mem_ptr + BOOT_HEAP_SIZE;
  77
  78        puts("\nDecompressing Linux... ");
  79        decompress(input_data, input_len, NULL, NULL, output_data, NULL, error);
  80        puts("done.\nBooting the kernel.\n");
  81}
  82