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1b93b3c3 | 1 | /* |
1b93b3c3 | 2 | * Copyright 2001 MontaVista Software Inc. |
1e1a77d6 | 3 | * Author: Matt Porter <mporter@mvista.com> |
1b93b3c3 | 4 | * |
f7a904df WZ |
5 | * Copyright (C) 2009 Lemote, Inc. |
6 | * Author: Wu Zhangjin <wuzhangjin@gmail.com> | |
1b93b3c3 WZ |
7 | * |
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. | |
12 | */ | |
13 | ||
14 | #include <linux/types.h> | |
15 | #include <linux/kernel.h> | |
16 | ||
17 | #include <asm/addrspace.h> | |
18 | ||
1e1a77d6 WZ |
19 | /* |
20 | * These two variables specify the free mem region | |
1b93b3c3 WZ |
21 | * that can be used for temporary malloc area |
22 | */ | |
23 | unsigned long free_mem_ptr; | |
24 | unsigned long free_mem_end_ptr; | |
1b93b3c3 WZ |
25 | |
26 | /* The linker tells us where the image is. */ | |
27 | extern unsigned char __image_begin, __image_end; | |
1b93b3c3 WZ |
28 | |
29 | /* debug interfaces */ | |
30 | extern void puts(const char *s); | |
31 | extern void puthex(unsigned long long val); | |
32 | ||
33 | void error(char *x) | |
34 | { | |
35 | puts("\n\n"); | |
36 | puts(x); | |
37 | puts("\n\n -- System halted"); | |
38 | ||
39 | while (1) | |
40 | ; /* Halt */ | |
41 | } | |
42 | ||
43 | /* activate the code for pre-boot environment */ | |
44 | #define STATIC static | |
45 | ||
46 | #ifdef CONFIG_KERNEL_GZIP | |
47 | void *memcpy(void *dest, const void *src, size_t n) | |
48 | { | |
49 | int i; | |
50 | const char *s = src; | |
51 | char *d = dest; | |
52 | ||
53 | for (i = 0; i < n; i++) | |
54 | d[i] = s[i]; | |
55 | return dest; | |
56 | } | |
57 | #include "../../../../lib/decompress_inflate.c" | |
58 | #endif | |
59 | ||
60 | #ifdef CONFIG_KERNEL_BZIP2 | |
61 | void *memset(void *s, int c, size_t n) | |
62 | { | |
63 | int i; | |
64 | char *ss = s; | |
65 | ||
66 | for (i = 0; i < n; i++) | |
67 | ss[i] = c; | |
68 | return s; | |
69 | } | |
70 | #include "../../../../lib/decompress_bunzip2.c" | |
71 | #endif | |
72 | ||
73 | #ifdef CONFIG_KERNEL_LZMA | |
74 | #include "../../../../lib/decompress_unlzma.c" | |
75 | #endif | |
76 | ||
fe1d45e0 WZ |
77 | #ifdef CONFIG_KERNEL_LZO |
78 | #include "../../../../lib/decompress_unlzo.c" | |
79 | #endif | |
80 | ||
1b93b3c3 WZ |
81 | void decompress_kernel(unsigned long boot_heap_start) |
82 | { | |
1e1a77d6 WZ |
83 | unsigned long zimage_start, zimage_size; |
84 | ||
85 | zimage_start = (unsigned long)(&__image_begin); | |
1b93b3c3 WZ |
86 | zimage_size = (unsigned long)(&__image_end) - |
87 | (unsigned long)(&__image_begin); | |
88 | ||
1b93b3c3 | 89 | puts("zimage at: "); |
1e1a77d6 | 90 | puthex(zimage_start); |
1b93b3c3 | 91 | puts(" "); |
1e1a77d6 | 92 | puthex(zimage_size + zimage_start); |
1b93b3c3 WZ |
93 | puts("\n"); |
94 | ||
1e1a77d6 | 95 | /* This area are prepared for mallocing when decompressing */ |
1b93b3c3 WZ |
96 | free_mem_ptr = boot_heap_start; |
97 | free_mem_end_ptr = boot_heap_start + BOOT_HEAP_SIZE; | |
98 | ||
1e1a77d6 | 99 | /* Display standard Linux/MIPS boot prompt */ |
1b93b3c3 WZ |
100 | puts("Uncompressing Linux at load address "); |
101 | puthex(VMLINUX_LOAD_ADDRESS_ULL); | |
102 | puts("\n"); | |
1e1a77d6 | 103 | |
1b93b3c3 | 104 | /* Decompress the kernel with according algorithm */ |
1e1a77d6 | 105 | decompress((char *)zimage_start, zimage_size, 0, 0, |
1b93b3c3 | 106 | (void *)VMLINUX_LOAD_ADDRESS_ULL, 0, error); |
1e1a77d6 WZ |
107 | |
108 | /* FIXME: should we flush cache here? */ | |
1b93b3c3 WZ |
109 | puts("Now, booting the kernel...\n"); |
110 | } |