arch/sh/boot/compressed/misc_64.c

   1 /*
   2  * arch/sh/boot/compressed/misc_64.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 SHmedia from sh by Stuart Menefy, May 2002
  10  */
  11
  12 #include <asm/uaccess.h>
  13
  14 /* cache.c */
  15 #define CACHE_ENABLE      0
  16 #define CACHE_DISABLE     1
  17 int cache_control(unsigned int command);
  18
  19 /*
  20  * gzip declarations
  21  */
  22
  23 #define STATIC static
  24
  25 #undef memset
  26 #undef memcpy
  27 #define memzero(s, n)     memset ((s), 0, (n))
  28
  29 static void error(char *m);
  30
  31 extern char input_data[];
  32 extern int input_len;
  33
  34 static unsigned char *output_data;
  35
  36 static void puts(const char *);
  37
  38 extern int _text;               /* Defined in vmlinux.lds.S */
  39 extern int _end;
  40 static unsigned long free_mem_ptr;
  41 static unsigned long free_mem_end_ptr;
  42
  43 #ifdef CONFIG_HAVE_KERNEL_BZIP2
  44 #define HEAP_SIZE       0x400000
  45 #else
  46 #define HEAP_SIZE       0x10000
  47 #endif
  48
  49 #ifdef CONFIG_KERNEL_GZIP
  50 #include "../../../../lib/decompress_inflate.c"
  51 #endif
  52
  53 #ifdef CONFIG_KERNEL_BZIP2
  54 #include "../../../../lib/decompress_bunzip2.c"
  55 #endif
  56
  57 #ifdef CONFIG_KERNEL_LZMA
  58 #include "../../../../lib/decompress_unlzma.c"
  59 #endif
  60
  61 void puts(const char *s)
  62 {
  63 }
  64
  65 void *memset(void *s, int c, size_t n)
  66 {
  67         int i;
  68         char *ss = (char *) s;
  69
  70         for (i = 0; i < n; i++)
  71                 ss[i] = c;
  72         return s;
  73 }
  74
  75 void *memcpy(void *__dest, __const void *__src, size_t __n)
  76 {
  77         int i;
  78         char *d = (char *) __dest, *s = (char *) __src;
  79
  80         for (i = 0; i < __n; i++)
  81                 d[i] = s[i];
  82         return __dest;
  83 }
  84
  85 static void error(char *x)
  86 {
  87         puts("\n\n");
  88         puts(x);
  89         puts("\n\n -- System halted");
  90
  91         while (1) ;             /* Halt */
  92 }
  93
  94 #define STACK_SIZE (4096)
  95 long __attribute__ ((aligned(8))) user_stack[STACK_SIZE];
  96 long *stack_start = &user_stack[STACK_SIZE];
  97
  98 void decompress_kernel(void)
  99 {
 100         output_data = (unsigned char *) (CONFIG_MEMORY_START + 0x2000);
 101         free_mem_ptr = (unsigned long) &_end;
 102         free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
 103
 104         puts("Uncompressing Linux... ");
 105         cache_control(CACHE_ENABLE);
 106         decompress(input_data, input_len, NULL, NULL, output_data, NULL, error);
 107         cache_control(CACHE_DISABLE);
 108         puts("Ok, booting the kernel.\n");
 109 }