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/page.h>
13#include "decompressor.h"
14#include "boot.h"
15
16/*
17 * gzip declarations
18 */
19#define STATIC static
20
21#undef memset
22#undef memcpy
23#undef memmove
24#define memmove memmove
25#define memzero(s, n) memset((s), 0, (n))
26
27#if defined(CONFIG_KERNEL_BZIP2)
28#define BOOT_HEAP_SIZE	0x400000
29#elif defined(CONFIG_KERNEL_ZSTD)
30#define BOOT_HEAP_SIZE	0x30000
31#else
32#define BOOT_HEAP_SIZE	0x10000
33#endif
34
35static unsigned long free_mem_ptr = (unsigned long) _end;
36static unsigned long free_mem_end_ptr = (unsigned long) _end + BOOT_HEAP_SIZE;
37
38#ifdef CONFIG_KERNEL_GZIP
39#include "../../../../lib/decompress_inflate.c"
40#endif
41
42#ifdef CONFIG_KERNEL_BZIP2
43#include "../../../../lib/decompress_bunzip2.c"
44#endif
45
46#ifdef CONFIG_KERNEL_LZ4
47#include "../../../../lib/decompress_unlz4.c"
48#endif
49
50#ifdef CONFIG_KERNEL_LZMA
51#include "../../../../lib/decompress_unlzma.c"
52#endif
53
54#ifdef CONFIG_KERNEL_LZO
55#include "../../../../lib/decompress_unlzo.c"
56#endif
57
58#ifdef CONFIG_KERNEL_XZ
59#include "../../../../lib/decompress_unxz.c"
60#endif
61
62#ifdef CONFIG_KERNEL_ZSTD
63#include "../../../../lib/decompress_unzstd.c"
64#endif
65
66unsigned long mem_safe_offset(void)
67{
68	return ALIGN(free_mem_end_ptr, PAGE_SIZE);
69}
70
71void deploy_kernel(void *output)
72{
73	__decompress(_compressed_start, _compressed_end - _compressed_start,
74		     NULL, NULL, output, vmlinux.image_size, NULL, error);
75}