release/src-rt-6.x.4708/linux/linux-2.6.36/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
  23 static void error(char *m);
  24
  25 #include "m32r_sio.c"
  26
  27 static unsigned long free_mem_ptr;
  28 static unsigned long free_mem_end_ptr;
  29
  30 #ifdef CONFIG_KERNEL_BZIP2
  31 static 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
  56 static 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
  65 void
  66 decompress_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 }