LXR linux/arch/unicore32/boot/compressed/misc.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * linux/arch/unicore32/boot/compressed/misc.c
   4 *
   5 * Code specific to PKUnity SoC and UniCore ISA
   6 *
   7 * Copyright (C) 2001-2010 GUAN Xue-tao
   8 */
   9
  10#include <asm/unaligned.h>
  11#include <mach/uncompress.h>
  12
  13/*
  14 * gzip delarations
  15 */
  16unsigned char *output_data;
  17unsigned long output_ptr;
  18
  19unsigned int free_mem_ptr;
  20unsigned int free_mem_end_ptr;
  21
  22#define STATIC static
  23#define STATIC_RW_DATA  /* non-static please */
  24
  25/*
  26 * arch-dependent implementations
  27 */
  28#ifndef ARCH_HAVE_DECOMP_ERROR
  29#define arch_decomp_error(x)
  30#endif
  31
  32#ifndef ARCH_HAVE_DECOMP_SETUP
  33#define arch_decomp_setup()
  34#endif
  35
  36#ifndef ARCH_HAVE_DECOMP_PUTS
  37#define arch_decomp_puts(p)
  38#endif
  39
  40void *memcpy(void *dest, const void *src, size_t n)
  41{
  42        int i = 0;
  43        unsigned char *d = (unsigned char *)dest, *s = (unsigned char *)src;
  44
  45        for (i = n >> 3; i > 0; i--) {
  46                *d++ = *s++;
  47                *d++ = *s++;
  48                *d++ = *s++;
  49                *d++ = *s++;
  50                *d++ = *s++;
  51                *d++ = *s++;
  52                *d++ = *s++;
  53                *d++ = *s++;
  54        }
  55
  56        if (n & 1 << 2) {
  57                *d++ = *s++;
  58                *d++ = *s++;
  59                *d++ = *s++;
  60                *d++ = *s++;
  61        }
  62
  63        if (n & 1 << 1) {
  64                *d++ = *s++;
  65                *d++ = *s++;
  66        }
  67
  68        if (n & 1)
  69                *d++ = *s++;
  70
  71        return dest;
  72}
  73
  74void error(char *x)
  75{
  76        arch_decomp_puts("\n\n");
  77        arch_decomp_puts(x);
  78        arch_decomp_puts("\n\n -- System halted");
  79
  80        arch_decomp_error(x);
  81
  82        for (;;)
  83                ; /* Halt */
  84}
  85
  86/* Heap size should be adjusted for different decompress method */
  87#ifdef CONFIG_KERNEL_GZIP
  88#include "../../../../lib/decompress_inflate.c"
  89#endif
  90
  91#ifdef CONFIG_KERNEL_BZIP2
  92#include "../../../../lib/decompress_bunzip2.c"
  93#endif
  94
  95#ifdef CONFIG_KERNEL_LZO
  96#include "../../../../lib/decompress_unlzo.c"
  97#endif
  98
  99#ifdef CONFIG_KERNEL_LZMA
 100#include "../../../../lib/decompress_unlzma.c"
 101#endif
 102
 103unsigned long decompress_kernel(unsigned long output_start,
 104                unsigned long free_mem_ptr_p,
 105                unsigned long free_mem_ptr_end_p)
 106{
 107        unsigned char *tmp;
 108
 109        output_data             = (unsigned char *)output_start;
 110        free_mem_ptr            = free_mem_ptr_p;
 111        free_mem_end_ptr        = free_mem_ptr_end_p;
 112
 113        arch_decomp_setup();
 114
 115        tmp = (unsigned char *) (((unsigned long)input_data_end) - 4);
 116        output_ptr = get_unaligned_le32(tmp);
 117
 118        arch_decomp_puts("Uncompressing Linux...");
 119        __decompress(input_data, input_data_end - input_data, NULL, NULL,
 120                        output_data, 0, NULL, error);
 121        arch_decomp_puts(" done, booting the kernel.\n");
 122        return output_ptr;
 123}
 124