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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#include <linux/libfdt.h>
18
19#include <asm/addrspace.h>
20
21/*
22 * These two variables specify the free mem region
23 * that can be used for temporary malloc area
24 */
25unsigned long free_mem_ptr;
26unsigned long free_mem_end_ptr;
27
28/* The linker tells us where the image is. */
29extern unsigned char __image_begin, __image_end;
30
31/* debug interfaces */
32#ifdef CONFIG_DEBUG_ZBOOT
33extern void puts(const char *s);
34extern void puthex(unsigned long long val);
35#else
36#define puts(s) do {} while (0)
37#define puthex(val) do {} while (0)
38#endif
39
40extern char __appended_dtb[];
41
42void 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
55#ifdef CONFIG_KERNEL_GZIP
56#include "../../../../lib/decompress_inflate.c"
57#endif
58
59#ifdef CONFIG_KERNEL_BZIP2
60#include "../../../../lib/decompress_bunzip2.c"
61#endif
62
63#ifdef CONFIG_KERNEL_LZ4
64#include "../../../../lib/decompress_unlz4.c"
65#endif
66
67#ifdef CONFIG_KERNEL_LZMA
68#include "../../../../lib/decompress_unlzma.c"
69#endif
70
71#ifdef CONFIG_KERNEL_LZO
72#include "../../../../lib/decompress_unlzo.c"
73#endif
74
75#ifdef CONFIG_KERNEL_XZ
76#include "../../../../lib/decompress_unxz.c"
77#endif
78
79const unsigned long __stack_chk_guard = 0x000a0dff;
80
81void __stack_chk_fail(void)
82{
83 error("stack-protector: Kernel stack is corrupted\n");
84}
85
86void decompress_kernel(unsigned long boot_heap_start)
87{
88 unsigned long zimage_start, zimage_size;
89
90 zimage_start = (unsigned long)(&__image_begin);
91 zimage_size = (unsigned long)(&__image_end) -
92 (unsigned long)(&__image_begin);
93
94 puts("zimage at: ");
95 puthex(zimage_start);
96 puts(" ");
97 puthex(zimage_size + zimage_start);
98 puts("\n");
99
100 /* This area are prepared for mallocing when decompressing */
101 free_mem_ptr = boot_heap_start;
102 free_mem_end_ptr = boot_heap_start + BOOT_HEAP_SIZE;
103
104 /* Display standard Linux/MIPS boot prompt */
105 puts("Uncompressing Linux at load address ");
106 puthex(VMLINUX_LOAD_ADDRESS_ULL);
107 puts("\n");
108
109 /* Decompress the kernel with according algorithm */
110 __decompress((char *)zimage_start, zimage_size, 0, 0,
111 (void *)VMLINUX_LOAD_ADDRESS_ULL, 0, 0, error);
112
113 if (IS_ENABLED(CONFIG_MIPS_RAW_APPENDED_DTB) &&
114 fdt_magic((void *)&__appended_dtb) == FDT_MAGIC) {
115 unsigned int image_size, dtb_size;
116
117 dtb_size = fdt_totalsize((void *)&__appended_dtb);
118
119 /* last four bytes is always image size in little endian */
120 image_size = le32_to_cpup((void *)&__image_end - 4);
121
122 /* copy dtb to where the booted kernel will expect it */
123 memcpy((void *)VMLINUX_LOAD_ADDRESS_ULL + image_size,
124 __appended_dtb, dtb_size);
125 }
126
127 /* FIXME: should we flush cache here? */
128 puts("Now, booting the kernel...\n");
129}
1// SPDX-License-Identifier: GPL-2.0-or-later
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 <linux/unaligned.h>
20#include <asm-generic/vmlinux.lds.h>
21
22#include "decompress.h"
23
24/*
25 * These two variables specify the free mem region
26 * that can be used for temporary malloc area
27 */
28unsigned long free_mem_ptr;
29unsigned long free_mem_end_ptr;
30
31void 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
72const unsigned long __stack_chk_guard = 0x000a0dff;
73
74void __stack_chk_fail(void)
75{
76 error("stack-protector: Kernel stack is corrupted\n");
77}
78
79void decompress_kernel(unsigned long boot_heap_start)
80{
81 unsigned long zimage_start, zimage_size;
82
83 zimage_start = (unsigned long)(__image_begin);
84 zimage_size = (unsigned long)(__image_end) -
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 mallocing when decompressing */
94 free_mem_ptr = boot_heap_start;
95 free_mem_end_ptr = boot_heap_start + BOOT_HEAP_SIZE;
96
97 /* Display standard Linux/MIPS boot prompt */
98 puts("Uncompressing Linux at load address ");
99 puthex(VMLINUX_LOAD_ADDRESS_ULL);
100 puts("\n");
101
102 /* Decompress the kernel with according algorithm */
103 __decompress((char *)zimage_start, zimage_size, 0, 0,
104 (void *)VMLINUX_LOAD_ADDRESS_ULL, 0, 0, error);
105
106 if (IS_ENABLED(CONFIG_MIPS_RAW_APPENDED_DTB) &&
107 fdt_magic((void *)&__appended_dtb) == FDT_MAGIC) {
108 unsigned int image_size, dtb_size;
109
110 dtb_size = fdt_totalsize((void *)&__appended_dtb);
111
112 /* last four bytes is always image size in little endian */
113 image_size = get_unaligned_le32((void *)__image_end - 4);
114
115 /* The device tree's address must be properly aligned */
116 image_size = ALIGN(image_size, STRUCT_ALIGNMENT);
117
118 puts("Copy device tree to address ");
119 puthex(VMLINUX_LOAD_ADDRESS_ULL + image_size);
120 puts("\n");
121
122 /* copy dtb to where the booted kernel will expect it */
123 memcpy((void *)VMLINUX_LOAD_ADDRESS_ULL + image_size,
124 __appended_dtb, dtb_size);
125 }
126
127 /* FIXME: should we flush cache here? */
128 puts("Now, booting the kernel...\n");
129}