Linux kernel mirror (for testing)
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linux
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Definitions and wrapper functions for kernel decompressor
4 *
5 * Copyright IBM Corp. 2010
6 *
7 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
8 */
9
10#include <linux/kernel.h>
11#include <linux/string.h>
12#include <asm/boot_data.h>
13#include <asm/page.h>
14#include "decompressor.h"
15#include "boot.h"
16
17/*
18 * gzip declarations
19 */
20#define STATIC static
21
22#undef memset
23#undef memcpy
24#undef memmove
25#define memmove memmove
26#define memzero(s, n) memset((s), 0, (n))
27
28#if defined(CONFIG_KERNEL_BZIP2)
29#define BOOT_HEAP_SIZE 0x400000
30#elif defined(CONFIG_KERNEL_ZSTD)
31#define BOOT_HEAP_SIZE 0x30000
32#else
33#define BOOT_HEAP_SIZE 0x10000
34#endif
35
36static unsigned long free_mem_ptr = (unsigned long) _end;
37static unsigned long free_mem_end_ptr = (unsigned long) _end + BOOT_HEAP_SIZE;
38
39#ifdef CONFIG_KERNEL_GZIP
40#include "../../../../lib/decompress_inflate.c"
41#endif
42
43#ifdef CONFIG_KERNEL_BZIP2
44#include "../../../../lib/decompress_bunzip2.c"
45#endif
46
47#ifdef CONFIG_KERNEL_LZ4
48#include "../../../../lib/decompress_unlz4.c"
49#endif
50
51#ifdef CONFIG_KERNEL_LZMA
52#include "../../../../lib/decompress_unlzma.c"
53#endif
54
55#ifdef CONFIG_KERNEL_LZO
56#include "../../../../lib/decompress_unlzo.c"
57#endif
58
59#ifdef CONFIG_KERNEL_XZ
60#include "../../../../lib/decompress_unxz.c"
61#endif
62
63#ifdef CONFIG_KERNEL_ZSTD
64#include "../../../../lib/decompress_unzstd.c"
65#endif
66
67static void decompress_error(char *m)
68{
69 if (bootdebug)
70 boot_rb_dump();
71 boot_panic("Decompression error: %s\n", m);
72}
73
74unsigned long mem_safe_offset(void)
75{
76 return ALIGN(free_mem_end_ptr, PAGE_SIZE);
77}
78
79void deploy_kernel(void *output)
80{
81 __decompress(_compressed_start, _compressed_end - _compressed_start,
82 NULL, NULL, output, vmlinux.image_size, NULL, decompress_error);
83}