arch/m32r/boot/compressed/misc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * arch/m32r/boot/compressed/misc.c
   4  *
   5  * This is a collection of several routines from gzip-1.0.3
   6  * adapted for Linux.
   7  *
   8  * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
   9  *
  10  * Adapted for SH by Stuart Menefy, Aug 1999
  11  *
  12  * 2003-02-12:  Support M32R by Takeo Takahashi
  13  */
  14
  15 /*
  16  * gzip declarations
  17  */
  18 #define STATIC static
  19
  20 #undef memset
  21 #undef memcpy
  22 #define memzero(s, n)     memset ((s), 0, (n))
  23
  24 static void error(char *m);
  25
  26 #include "m32r_sio.c"
  27
  28 static unsigned long free_mem_ptr;
  29 static unsigned long free_mem_end_ptr;
  30
  31 #ifdef CONFIG_KERNEL_BZIP2
  32 void *memset(void *s, int c, size_t n)
  33 {
  34         char *ss = s;
  35
  36         while (n--)
  37                 *ss++ = c;
  38         return s;
  39 }
  40 #endif
  41
  42 #ifdef CONFIG_KERNEL_GZIP
  43 void *memcpy(void *dest, const void *src, size_t n)
  44 {
  45         char *d = dest;
  46         const char *s = src;
  47         while (n--)
  48                 *d++ = *s++;
  49
  50         return dest;
  51 }
  52
  53 #define BOOT_HEAP_SIZE             0x10000
  54 #include "../../../../lib/decompress_inflate.c"
  55 #endif
  56
  57 #ifdef CONFIG_KERNEL_BZIP2
  58 #define BOOT_HEAP_SIZE             0x400000
  59 #include "../../../../lib/decompress_bunzip2.c"
  60 #endif
  61
  62 #ifdef CONFIG_KERNEL_LZMA
  63 #define BOOT_HEAP_SIZE             0x10000
  64 #include "../../../../lib/decompress_unlzma.c"
  65 #endif
  66
  67 static void error(char *x)
  68 {
  69         puts("\n\n");
  70         puts(x);
  71         puts("\n\n -- System halted");
  72
  73         while(1);       /* Halt */
  74 }
  75
  76 void
  77 decompress_kernel(int mmu_on, unsigned char *zimage_data,
  78                   unsigned int zimage_len, unsigned long heap)
  79 {
  80         unsigned char *input_data = zimage_data;
  81         int input_len = zimage_len;
  82         unsigned char *output_data;
  83
  84         output_data = (unsigned char *)CONFIG_MEMORY_START + 0x2000
  85                 + (mmu_on ? 0x80000000 : 0);
  86         free_mem_ptr = heap;
  87         free_mem_end_ptr = free_mem_ptr + BOOT_HEAP_SIZE;
  88
  89         puts("\nDecompressing Linux... ");
  90         __decompress(input_data, input_len, NULL, NULL, output_data, 0,
  91                         NULL, error);
  92         puts("done.\nBooting the kernel.\n");
  93 }