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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 <asm/unaligned.h>
20#include <asm-generic/vmlinux.lds.h>
21
22/*
23 * These two variables specify the free mem region
24 * that can be used for temporary malloc area
25 */
26unsigned long free_mem_ptr;
27unsigned long free_mem_end_ptr;
28
29/* The linker tells us where the image is. */
30extern unsigned char __image_begin[], __image_end[];
31
32/* debug interfaces */
33#ifdef CONFIG_DEBUG_ZBOOT
34extern void puts(const char *s);
35extern void puthex(unsigned long long val);
36#else
37#define puts(s) do {} while (0)
38#define puthex(val) do {} while (0)
39#endif
40
41extern char __appended_dtb[];
42
43void error(char *x)
44{
45 puts("\n\n");
46 puts(x);
47 puts("\n\n -- System halted");
48
49 while (1)
50 ; /* Halt */
51}
52
53/* activate the code for pre-boot environment */
54#define STATIC static
55
56#ifdef CONFIG_KERNEL_GZIP
57#include "../../../../lib/decompress_inflate.c"
58#endif
59
60#ifdef CONFIG_KERNEL_BZIP2
61#include "../../../../lib/decompress_bunzip2.c"
62#endif
63
64#ifdef CONFIG_KERNEL_LZ4
65#include "../../../../lib/decompress_unlz4.c"
66#endif
67
68#ifdef CONFIG_KERNEL_LZMA
69#include "../../../../lib/decompress_unlzma.c"
70#endif
71
72#ifdef CONFIG_KERNEL_LZO
73#include "../../../../lib/decompress_unlzo.c"
74#endif
75
76#ifdef CONFIG_KERNEL_XZ
77#include "../../../../lib/decompress_unxz.c"
78#endif
79
80#ifdef CONFIG_KERNEL_ZSTD
81#include "../../../../lib/decompress_unzstd.c"
82#endif
83
84const unsigned long __stack_chk_guard = 0x000a0dff;
85
86void __stack_chk_fail(void)
87{
88 error("stack-protector: Kernel stack is corrupted\n");
89}
90
91void decompress_kernel(unsigned long boot_heap_start)
92{
93 unsigned long zimage_start, zimage_size;
94
95 zimage_start = (unsigned long)(__image_begin);
96 zimage_size = (unsigned long)(__image_end) -
97 (unsigned long)(__image_begin);
98
99 puts("zimage at: ");
100 puthex(zimage_start);
101 puts(" ");
102 puthex(zimage_size + zimage_start);
103 puts("\n");
104
105 /* This area are prepared for mallocing when decompressing */
106 free_mem_ptr = boot_heap_start;
107 free_mem_end_ptr = boot_heap_start + BOOT_HEAP_SIZE;
108
109 /* Display standard Linux/MIPS boot prompt */
110 puts("Uncompressing Linux at load address ");
111 puthex(VMLINUX_LOAD_ADDRESS_ULL);
112 puts("\n");
113
114 /* Decompress the kernel with according algorithm */
115 __decompress((char *)zimage_start, zimage_size, 0, 0,
116 (void *)VMLINUX_LOAD_ADDRESS_ULL, 0, 0, error);
117
118 if (IS_ENABLED(CONFIG_MIPS_RAW_APPENDED_DTB) &&
119 fdt_magic((void *)&__appended_dtb) == FDT_MAGIC) {
120 unsigned int image_size, dtb_size;
121
122 dtb_size = fdt_totalsize((void *)&__appended_dtb);
123
124 /* last four bytes is always image size in little endian */
125 image_size = get_unaligned_le32((void *)__image_end - 4);
126
127 /* The device tree's address must be properly aligned */
128 image_size = ALIGN(image_size, STRUCT_ALIGNMENT);
129
130 puts("Copy device tree to address ");
131 puthex(VMLINUX_LOAD_ADDRESS_ULL + image_size);
132 puts("\n");
133
134 /* copy dtb to where the booted kernel will expect it */
135 memcpy((void *)VMLINUX_LOAD_ADDRESS_ULL + image_size,
136 __appended_dtb, dtb_size);
137 }
138
139 /* FIXME: should we flush cache here? */
140 puts("Now, booting the kernel...\n");
141}
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
17#include <asm/addrspace.h>
18
19/*
20 * These two variables specify the free mem region
21 * that can be used for temporary malloc area
22 */
23unsigned long free_mem_ptr;
24unsigned long free_mem_end_ptr;
25
26/* The linker tells us where the image is. */
27extern unsigned char __image_begin, __image_end;
28
29/* debug interfaces */
30extern void puts(const char *s);
31extern void puthex(unsigned long long val);
32
33void error(char *x)
34{
35 puts("\n\n");
36 puts(x);
37 puts("\n\n -- System halted");
38
39 while (1)
40 ; /* Halt */
41}
42
43/* activate the code for pre-boot environment */
44#define STATIC static
45
46#ifdef CONFIG_KERNEL_GZIP
47#include "../../../../lib/decompress_inflate.c"
48#endif
49
50#ifdef CONFIG_KERNEL_BZIP2
51#include "../../../../lib/decompress_bunzip2.c"
52#endif
53
54#ifdef CONFIG_KERNEL_LZ4
55#include "../../../../lib/decompress_unlz4.c"
56#endif
57
58#ifdef CONFIG_KERNEL_LZMA
59#include "../../../../lib/decompress_unlzma.c"
60#endif
61
62#ifdef CONFIG_KERNEL_LZO
63#include "../../../../lib/decompress_unlzo.c"
64#endif
65
66#ifdef CONFIG_KERNEL_XZ
67#include "../../../../lib/decompress_unxz.c"
68#endif
69
70void decompress_kernel(unsigned long boot_heap_start)
71{
72 unsigned long zimage_start, zimage_size;
73
74 zimage_start = (unsigned long)(&__image_begin);
75 zimage_size = (unsigned long)(&__image_end) -
76 (unsigned long)(&__image_begin);
77
78 puts("zimage at: ");
79 puthex(zimage_start);
80 puts(" ");
81 puthex(zimage_size + zimage_start);
82 puts("\n");
83
84 /* This area are prepared for mallocing when decompressing */
85 free_mem_ptr = boot_heap_start;
86 free_mem_end_ptr = boot_heap_start + BOOT_HEAP_SIZE;
87
88 /* Display standard Linux/MIPS boot prompt */
89 puts("Uncompressing Linux at load address ");
90 puthex(VMLINUX_LOAD_ADDRESS_ULL);
91 puts("\n");
92
93 /* Decompress the kernel with according algorithm */
94 decompress((char *)zimage_start, zimage_size, 0, 0,
95 (void *)VMLINUX_LOAD_ADDRESS_ULL, 0, error);
96
97 /* FIXME: should we flush cache here? */
98 puts("Now, booting the kernel...\n");
99}