Commit | Line | Data |
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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 | 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> |
b8f54f2c | 17 | #include <linux/libfdt.h> |
1b93b3c3 WZ |
18 | |
19 | #include <asm/addrspace.h> | |
20 | ||
1e1a77d6 WZ |
21 | /* |
22 | * These two variables specify the free mem region | |
1b93b3c3 WZ |
23 | * that can be used for temporary malloc area |
24 | */ | |
25 | unsigned long free_mem_ptr; | |
26 | unsigned long free_mem_end_ptr; | |
1b93b3c3 WZ |
27 | |
28 | /* The linker tells us where the image is. */ | |
29 | extern unsigned char __image_begin, __image_end; | |
1b93b3c3 WZ |
30 | |
31 | /* debug interfaces */ | |
7ae7ef3f | 32 | #ifdef CONFIG_DEBUG_ZBOOT |
1b93b3c3 WZ |
33 | extern void puts(const char *s); |
34 | extern void puthex(unsigned long long val); | |
7ae7ef3f WZ |
35 | #else |
36 | #define puts(s) do {} while (0) | |
37 | #define puthex(val) do {} while (0) | |
38 | #endif | |
1b93b3c3 | 39 | |
b8f54f2c JG |
40 | extern char __appended_dtb[]; |
41 | ||
1b93b3c3 WZ |
42 | void error(char *x) |
43 | { | |
44 | puts("\n\n"); | |
45 | puts(x); | |
46 | puts("\n\n -- System halted"); | |
47 | ||
48 | while (1) | |
49 | ; /* Halt */ | |
50 | } | |
51 | ||
52 | /* activate the code for pre-boot environment */ | |
53 | #define STATIC static | |
54 | ||
4e23eb63 | 55 | #ifdef CONFIG_KERNEL_GZIP |
1b93b3c3 WZ |
56 | #include "../../../../lib/decompress_inflate.c" |
57 | #endif | |
58 | ||
59 | #ifdef CONFIG_KERNEL_BZIP2 | |
1b93b3c3 WZ |
60 | #include "../../../../lib/decompress_bunzip2.c" |
61 | #endif | |
62 | ||
31c4867d FF |
63 | #ifdef CONFIG_KERNEL_LZ4 |
64 | #include "../../../../lib/decompress_unlz4.c" | |
65 | #endif | |
66 | ||
1b93b3c3 WZ |
67 | #ifdef CONFIG_KERNEL_LZMA |
68 | #include "../../../../lib/decompress_unlzma.c" | |
69 | #endif | |
70 | ||
fe1d45e0 WZ |
71 | #ifdef CONFIG_KERNEL_LZO |
72 | #include "../../../../lib/decompress_unlzo.c" | |
73 | #endif | |
74 | ||
4e23eb63 FF |
75 | #ifdef CONFIG_KERNEL_XZ |
76 | #include "../../../../lib/decompress_unxz.c" | |
77 | #endif | |
78 | ||
3b628cac BC |
79 | unsigned long __stack_chk_guard; |
80 | ||
81 | void __stack_chk_guard_setup(void) | |
82 | { | |
83 | __stack_chk_guard = 0x000a0dff; | |
84 | } | |
85 | ||
86 | void __stack_chk_fail(void) | |
87 | { | |
88 | error("stack-protector: Kernel stack is corrupted\n"); | |
89 | } | |
90 | ||
1b93b3c3 WZ |
91 | void decompress_kernel(unsigned long boot_heap_start) |
92 | { | |
1e1a77d6 WZ |
93 | unsigned long zimage_start, zimage_size; |
94 | ||
3b628cac BC |
95 | __stack_chk_guard_setup(); |
96 | ||
1e1a77d6 | 97 | zimage_start = (unsigned long)(&__image_begin); |
1b93b3c3 WZ |
98 | zimage_size = (unsigned long)(&__image_end) - |
99 | (unsigned long)(&__image_begin); | |
100 | ||
1b93b3c3 | 101 | puts("zimage at: "); |
1e1a77d6 | 102 | puthex(zimage_start); |
1b93b3c3 | 103 | puts(" "); |
1e1a77d6 | 104 | puthex(zimage_size + zimage_start); |
1b93b3c3 WZ |
105 | puts("\n"); |
106 | ||
1e1a77d6 | 107 | /* This area are prepared for mallocing when decompressing */ |
1b93b3c3 WZ |
108 | free_mem_ptr = boot_heap_start; |
109 | free_mem_end_ptr = boot_heap_start + BOOT_HEAP_SIZE; | |
110 | ||
1e1a77d6 | 111 | /* Display standard Linux/MIPS boot prompt */ |
1b93b3c3 WZ |
112 | puts("Uncompressing Linux at load address "); |
113 | puthex(VMLINUX_LOAD_ADDRESS_ULL); | |
114 | puts("\n"); | |
1e1a77d6 | 115 | |
1b93b3c3 | 116 | /* Decompress the kernel with according algorithm */ |
2d3862d2 YL |
117 | __decompress((char *)zimage_start, zimage_size, 0, 0, |
118 | (void *)VMLINUX_LOAD_ADDRESS_ULL, 0, 0, error); | |
1e1a77d6 | 119 | |
b8f54f2c JG |
120 | if (IS_ENABLED(CONFIG_MIPS_RAW_APPENDED_DTB) && |
121 | fdt_magic((void *)&__appended_dtb) == FDT_MAGIC) { | |
122 | unsigned int image_size, dtb_size; | |
123 | ||
124 | dtb_size = fdt_totalsize((void *)&__appended_dtb); | |
125 | ||
126 | /* last four bytes is always image size in little endian */ | |
127 | image_size = le32_to_cpup((void *)&__image_end - 4); | |
128 | ||
129 | /* copy dtb to where the booted kernel will expect it */ | |
130 | memcpy((void *)VMLINUX_LOAD_ADDRESS_ULL + image_size, | |
131 | __appended_dtb, dtb_size); | |
132 | } | |
133 | ||
1e1a77d6 | 134 | /* FIXME: should we flush cache here? */ |
1b93b3c3 WZ |
135 | puts("Now, booting the kernel...\n"); |
136 | } |