LXR linux/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
  24static void error(char *m);
  25
  26#include "m32r_sio.c"
  27
  28static unsigned long free_mem_ptr;
  29static unsigned long free_mem_end_ptr;
  30
  31#ifdef CONFIG_KERNEL_BZIP2
  32void *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
  43void *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
  67static 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
  76void
  77decompress_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}
  94