| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2001 MontaVista Software Inc. |
| 3 | * Author: Matt Porter <mporter@mvista.com> |
| 4 | * |
| 5 | * Copyright (C) 2009 Lemote, Inc. |
| 6 | * Author: Wu Zhangjin <wuzhangjin@gmail.com> |
| 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 | #include <linux/string.h> |
| 17 | |
| 18 | #include <asm/addrspace.h> |
| 19 | |
| 20 | /* |
| 21 | * These two variables specify the free mem region |
| 22 | * that can be used for temporary malloc area |
| 23 | */ |
| 24 | unsigned long free_mem_ptr; |
| 25 | unsigned long free_mem_end_ptr; |
| 26 | |
| 27 | /* The linker tells us where the image is. */ |
| 28 | extern unsigned char __image_begin, __image_end; |
| 29 | |
| 30 | /* debug interfaces */ |
| 31 | #ifdef CONFIG_DEBUG_ZBOOT |
| 32 | extern void puts(const char *s); |
| 33 | extern void puthex(unsigned long long val); |
| 34 | #else |
| 35 | #define puts(s) do {} while (0) |
| 36 | #define puthex(val) do {} while (0) |
| 37 | #endif |
| 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 | |
| 52 | #ifdef CONFIG_KERNEL_GZIP |
| 53 | #include "../../../../lib/decompress_inflate.c" |
| 54 | #endif |
| 55 | |
| 56 | #ifdef CONFIG_KERNEL_BZIP2 |
| 57 | #include "../../../../lib/decompress_bunzip2.c" |
| 58 | #endif |
| 59 | |
| 60 | #ifdef CONFIG_KERNEL_LZ4 |
| 61 | #include "../../../../lib/decompress_unlz4.c" |
| 62 | #endif |
| 63 | |
| 64 | #ifdef CONFIG_KERNEL_LZMA |
| 65 | #include "../../../../lib/decompress_unlzma.c" |
| 66 | #endif |
| 67 | |
| 68 | #ifdef CONFIG_KERNEL_LZO |
| 69 | #include "../../../../lib/decompress_unlzo.c" |
| 70 | #endif |
| 71 | |
| 72 | #ifdef CONFIG_KERNEL_XZ |
| 73 | #include "../../../../lib/decompress_unxz.c" |
| 74 | #endif |
| 75 | |
| 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 | |
| 88 | void decompress_kernel(unsigned long boot_heap_start) |
| 89 | { |
| 90 | unsigned long zimage_start, zimage_size; |
| 91 | |
| 92 | __stack_chk_guard_setup(); |
| 93 | |
| 94 | zimage_start = (unsigned long)(&__image_begin); |
| 95 | zimage_size = (unsigned long)(&__image_end) - |
| 96 | (unsigned long)(&__image_begin); |
| 97 | |
| 98 | puts("zimage at: "); |
| 99 | puthex(zimage_start); |
| 100 | puts(" "); |
| 101 | puthex(zimage_size + zimage_start); |
| 102 | puts("\n"); |
| 103 | |
| 104 | /* This area are prepared for mallocing when decompressing */ |
| 105 | free_mem_ptr = boot_heap_start; |
| 106 | free_mem_end_ptr = boot_heap_start + BOOT_HEAP_SIZE; |
| 107 | |
| 108 | /* Display standard Linux/MIPS boot prompt */ |
| 109 | puts("Uncompressing Linux at load address "); |
| 110 | puthex(VMLINUX_LOAD_ADDRESS_ULL); |
| 111 | puts("\n"); |
| 112 | |
| 113 | /* Decompress the kernel with according algorithm */ |
| 114 | __decompress((char *)zimage_start, zimage_size, 0, 0, |
| 115 | (void *)VMLINUX_LOAD_ADDRESS_ULL, 0, 0, error); |
| 116 | |
| 117 | /* FIXME: should we flush cache here? */ |
| 118 | puts("Now, booting the kernel...\n"); |
| 119 | } |