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 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 void *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
  66 static 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
  75 void
  76 decompress_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 }