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misc.c

/*
 * arch/m32r/boot/compressed/misc.c
 *
 * This is a collection of several routines from gzip-1.0.3
 * adapted for Linux.
 *
 * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
 *
 * Adapted for SH by Stuart Menefy, Aug 1999
 *
 * 2003-02-12:    Support M32R by Takeo Takahashi
 */

/*
 * gzip declarations
 */
#define STATIC static

#undef memset
#undef memcpy
#define memzero(s, n)     memset ((s), 0, (n))

static void error(char *m);

#include "m32r_sio.c"

static unsigned long free_mem_ptr;
static unsigned long free_mem_end_ptr;

#ifdef CONFIG_KERNEL_BZIP2
static void *memset(void *s, int c, size_t n)
{
      char *ss = s;

      while (n--)
                  *ss++ = c;
      return s;
}
#endif

#ifdef CONFIG_KERNEL_GZIP
#define BOOT_HEAP_SIZE             0x10000
#include "../../../../lib/decompress_inflate.c"
#endif

#ifdef CONFIG_KERNEL_BZIP2
#define BOOT_HEAP_SIZE             0x400000
#include "../../../../lib/decompress_bunzip2.c"
#endif

#ifdef CONFIG_KERNEL_LZMA
#define BOOT_HEAP_SIZE             0x10000
#include "../../../../lib/decompress_unlzma.c"
#endif

static void error(char *x)
{
      puts("\n\n");
      puts(x);
      puts("\n\n -- System halted");

      while(1);   /* Halt */
}

void
decompress_kernel(int mmu_on, unsigned char *zimage_data,
              unsigned int zimage_len, unsigned long heap)
{
      unsigned char *input_data = zimage_data;
      int input_len = zimage_len;
      unsigned char *output_data;

      output_data = (unsigned char *)CONFIG_MEMORY_START + 0x2000
            + (mmu_on ? 0x80000000 : 0);
      free_mem_ptr = heap;
      free_mem_end_ptr = free_mem_ptr + BOOT_HEAP_SIZE;

      puts("\nDecompressing Linux... ");
      decompress(input_data, input_len, NULL, NULL, output_data, NULL, error);
      puts("done.\nBooting the kernel.\n");
}

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