2 * Copyright 2001 MontaVista Software Inc.
3 * Author: Matt Porter <mporter@mvista.com>
5 * Copyright (C) 2009 Lemote, Inc.
6 * Author: Wu Zhangjin <wuzhangjin@gmail.com>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
14 #include <linux/types.h>
15 #include <linux/kernel.h>
17 #include <asm/addrspace.h>
20 * These two variables specify the free mem region
21 * that can be used for temporary malloc area
23 unsigned long free_mem_ptr;
24 unsigned long free_mem_end_ptr;
26 /* The linker tells us where the image is. */
27 extern unsigned char __image_begin, __image_end;
29 /* debug interfaces */
30 extern void puts(const char *s);
31 extern void puthex(unsigned long long val);
37 puts("\n\n -- System halted");
43 /* activate the code for pre-boot environment */
46 #if defined(CONFIG_KERNEL_GZIP) || defined(CONFIG_KERNEL_XZ) || \
47 defined(CONFIG_KERNEL_LZ4)
48 void *memcpy(void *dest, const void *src, size_t n)
54 for (i = 0; i < n; i++)
59 #ifdef CONFIG_KERNEL_GZIP
60 #include "../../../../lib/decompress_inflate.c"
63 #ifdef CONFIG_KERNEL_BZIP2
64 void *memset(void *s, int c, size_t n)
69 for (i = 0; i < n; i++)
73 #include "../../../../lib/decompress_bunzip2.c"
76 #ifdef CONFIG_KERNEL_LZ4
77 #include "../../../../lib/decompress_unlz4.c"
80 #ifdef CONFIG_KERNEL_LZMA
81 #include "../../../../lib/decompress_unlzma.c"
84 #ifdef CONFIG_KERNEL_LZO
85 #include "../../../../lib/decompress_unlzo.c"
88 #ifdef CONFIG_KERNEL_XZ
89 #include "../../../../lib/decompress_unxz.c"
92 void decompress_kernel(unsigned long boot_heap_start)
94 unsigned long zimage_start, zimage_size;
96 zimage_start = (unsigned long)(&__image_begin);
97 zimage_size = (unsigned long)(&__image_end) -
98 (unsigned long)(&__image_begin);
101 puthex(zimage_start);
103 puthex(zimage_size + zimage_start);
106 /* This area are prepared for mallocing when decompressing */
107 free_mem_ptr = boot_heap_start;
108 free_mem_end_ptr = boot_heap_start + BOOT_HEAP_SIZE;
110 /* Display standard Linux/MIPS boot prompt */
111 puts("Uncompressing Linux at load address ");
112 puthex(VMLINUX_LOAD_ADDRESS_ULL);
115 /* Decompress the kernel with according algorithm */
116 decompress((char *)zimage_start, zimage_size, 0, 0,
117 (void *)VMLINUX_LOAD_ADDRESS_ULL, 0, error);
119 /* FIXME: should we flush cache here? */
120 puts("Now, booting the kernel...\n");