Commit | Line | Data |
---|---|---|
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 | 7 | * |
70342287 RB |
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 | |
1b93b3c3 WZ |
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> | |
29593fd5 | 16 | #include <linux/string.h> |
1b93b3c3 WZ |
17 | |
18 | #include <asm/addrspace.h> | |
19 | ||
1e1a77d6 WZ |
20 | /* |
21 | * These two variables specify the free mem region | |
1b93b3c3 WZ |
22 | * that can be used for temporary malloc area |
23 | */ | |
24 | unsigned long free_mem_ptr; | |
25 | unsigned long free_mem_end_ptr; | |
1b93b3c3 WZ |
26 | |
27 | /* The linker tells us where the image is. */ | |
28 | extern unsigned char __image_begin, __image_end; | |
1b93b3c3 WZ |
29 | |
30 | /* debug interfaces */ | |
7ae7ef3f | 31 | #ifdef CONFIG_DEBUG_ZBOOT |
1b93b3c3 WZ |
32 | extern void puts(const char *s); |
33 | extern void puthex(unsigned long long val); | |
7ae7ef3f WZ |
34 | #else |
35 | #define puts(s) do {} while (0) | |
36 | #define puthex(val) do {} while (0) | |
37 | #endif | |
1b93b3c3 WZ |
38 | |
39 | void error(char *x) | |
40 | { | |
41 | puts("\n\n"); | |
42 | puts(x); | |
43 | puts("\n\n -- System halted"); | |
44 | ||
45 | while (1) | |
46 | ; /* Halt */ | |
47 | } | |
48 | ||
49 | /* activate the code for pre-boot environment */ | |
50 | #define STATIC static | |
51 | ||
4e23eb63 | 52 | #ifdef CONFIG_KERNEL_GZIP |
1b93b3c3 WZ |
53 | #include "../../../../lib/decompress_inflate.c" |
54 | #endif | |
55 | ||
56 | #ifdef CONFIG_KERNEL_BZIP2 | |
1b93b3c3 WZ |
57 | #include "../../../../lib/decompress_bunzip2.c" |
58 | #endif | |
59 | ||
31c4867d FF |
60 | #ifdef CONFIG_KERNEL_LZ4 |
61 | #include "../../../../lib/decompress_unlz4.c" | |
62 | #endif | |
63 | ||
1b93b3c3 WZ |
64 | #ifdef CONFIG_KERNEL_LZMA |
65 | #include "../../../../lib/decompress_unlzma.c" | |
66 | #endif | |
67 | ||
fe1d45e0 WZ |
68 | #ifdef CONFIG_KERNEL_LZO |
69 | #include "../../../../lib/decompress_unlzo.c" | |
70 | #endif | |
71 | ||
4e23eb63 FF |
72 | #ifdef CONFIG_KERNEL_XZ |
73 | #include "../../../../lib/decompress_unxz.c" | |
74 | #endif | |
75 | ||
3b628cac BC |
76 | unsigned long __stack_chk_guard; |
77 | ||
78 | void __stack_chk_guard_setup(void) | |
79 | { | |
80 | __stack_chk_guard = 0x000a0dff; | |
81 | } | |
82 | ||
83 | void __stack_chk_fail(void) | |
84 | { | |
85 | error("stack-protector: Kernel stack is corrupted\n"); | |
86 | } | |
87 | ||
1b93b3c3 WZ |
88 | void decompress_kernel(unsigned long boot_heap_start) |
89 | { | |
1e1a77d6 WZ |
90 | unsigned long zimage_start, zimage_size; |
91 | ||
3b628cac BC |
92 | __stack_chk_guard_setup(); |
93 | ||
1e1a77d6 | 94 | zimage_start = (unsigned long)(&__image_begin); |
1b93b3c3 WZ |
95 | zimage_size = (unsigned long)(&__image_end) - |
96 | (unsigned long)(&__image_begin); | |
97 | ||
1b93b3c3 | 98 | puts("zimage at: "); |
1e1a77d6 | 99 | puthex(zimage_start); |
1b93b3c3 | 100 | puts(" "); |
1e1a77d6 | 101 | puthex(zimage_size + zimage_start); |
1b93b3c3 WZ |
102 | puts("\n"); |
103 | ||
1e1a77d6 | 104 | /* This area are prepared for mallocing when decompressing */ |
1b93b3c3 WZ |
105 | free_mem_ptr = boot_heap_start; |
106 | free_mem_end_ptr = boot_heap_start + BOOT_HEAP_SIZE; | |
107 | ||
1e1a77d6 | 108 | /* Display standard Linux/MIPS boot prompt */ |
1b93b3c3 WZ |
109 | puts("Uncompressing Linux at load address "); |
110 | puthex(VMLINUX_LOAD_ADDRESS_ULL); | |
111 | puts("\n"); | |
1e1a77d6 | 112 | |
1b93b3c3 | 113 | /* Decompress the kernel with according algorithm */ |
2d3862d2 YL |
114 | __decompress((char *)zimage_start, zimage_size, 0, 0, |
115 | (void *)VMLINUX_LOAD_ADDRESS_ULL, 0, 0, error); | |
1e1a77d6 WZ |
116 | |
117 | /* FIXME: should we flush cache here? */ | |
1b93b3c3 WZ |
118 | puts("Now, booting the kernel...\n"); |
119 | } |