1 // SPDX-License-Identifier: GPL-2.0-or-later 1
2 /*
3 * Copyright 2001 MontaVista Software Inc.
4 * Author: Matt Porter <mporter@mvista.com>
5 *
6 * Copyright (C) 2009 Lemote, Inc.
7 * Author: Wu Zhangjin <wuzhangjin@gmail.com>
8 */
9
10 #define DISABLE_BRANCH_PROFILING
11
12 #define __NO_FORTIFY
13 #include <linux/types.h>
14 #include <linux/kernel.h>
15 #include <linux/string.h>
16 #include <linux/libfdt.h>
17
18 #include <asm/addrspace.h>
19 #include <asm/unaligned.h>
20 #include <asm-generic/vmlinux.lds.h>
21
22 #include "decompress.h"
23
24 /*
25 * These two variables specify the free mem re
26 * that can be used for temporary malloc area
27 */
28 unsigned long free_mem_ptr;
29 unsigned long free_mem_end_ptr;
30
31 void error(char *x)
32 {
33 puts("\n\n");
34 puts(x);
35 puts("\n\n -- System halted");
36
37 while (1)
38 ; /* Halt */
39 }
40
41 /* activate the code for pre-boot environment
42 #define STATIC static
43
44 #ifdef CONFIG_KERNEL_GZIP
45 #include "../../../../lib/decompress_inflate.c
46 #endif
47
48 #ifdef CONFIG_KERNEL_BZIP2
49 #include "../../../../lib/decompress_bunzip2.c
50 #endif
51
52 #ifdef CONFIG_KERNEL_LZ4
53 #include "../../../../lib/decompress_unlz4.c"
54 #endif
55
56 #ifdef CONFIG_KERNEL_LZMA
57 #include "../../../../lib/decompress_unlzma.c"
58 #endif
59
60 #ifdef CONFIG_KERNEL_LZO
61 #include "../../../../lib/decompress_unlzo.c"
62 #endif
63
64 #ifdef CONFIG_KERNEL_XZ
65 #include "../../../../lib/decompress_unxz.c"
66 #endif
67
68 #ifdef CONFIG_KERNEL_ZSTD
69 #include "../../../../lib/decompress_unzstd.c"
70 #endif
71
72 const unsigned long __stack_chk_guard = 0x000a
73
74 void __stack_chk_fail(void)
75 {
76 error("stack-protector: Kernel stack i
77 }
78
79 void decompress_kernel(unsigned long boot_heap
80 {
81 unsigned long zimage_start, zimage_siz
82
83 zimage_start = (unsigned long)(__image
84 zimage_size = (unsigned long)(__image_
85 (unsigned long)(__image_begin);
86
87 puts("zimage at: ");
88 puthex(zimage_start);
89 puts(" ");
90 puthex(zimage_size + zimage_start);
91 puts("\n");
92
93 /* This area are prepared for mallocin
94 free_mem_ptr = boot_heap_start;
95 free_mem_end_ptr = boot_heap_start + B
96
97 /* Display standard Linux/MIPS boot pr
98 puts("Uncompressing Linux at load addr
99 puthex(VMLINUX_LOAD_ADDRESS_ULL);
100 puts("\n");
101
102 /* Decompress the kernel with accordin
103 __decompress((char *)zimage_start, zim
104 (void *)VMLINUX_LOAD_ADDRES
105
106 if (IS_ENABLED(CONFIG_MIPS_RAW_APPENDE
107 fdt_magic((void *)&__appended_dtb)
108 unsigned int image_size, dtb_s
109
110 dtb_size = fdt_totalsize((void
111
112 /* last four bytes is always i
113 image_size = get_unaligned_le3
114
115 /* The device tree's address m
116 image_size = ALIGN(image_size,
117
118 puts("Copy device tree to addr
119 puthex(VMLINUX_LOAD_ADDRESS_UL
120 puts("\n");
121
122 /* copy dtb to where the boote
123 memcpy((void *)VMLINUX_LOAD_AD
124 __appended_dtb, dtb_siz
125 }
126
127 /* FIXME: should we flush cache here?
128 puts("Now, booting the kernel...\n");
129 }
130
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