87 lines
1.9 KiB
C
87 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Definitions and wrapper functions for kernel decompressor
|
|
*
|
|
* Copyright IBM Corp. 2010
|
|
*
|
|
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/string.h>
|
|
#include <asm/page.h>
|
|
#include "decompressor.h"
|
|
#include "boot.h"
|
|
|
|
/*
|
|
* gzip declarations
|
|
*/
|
|
#define STATIC static
|
|
|
|
#undef memset
|
|
#undef memcpy
|
|
#undef memmove
|
|
#define memmove memmove
|
|
#define memzero(s, n) memset((s), 0, (n))
|
|
|
|
#if defined(CONFIG_KERNEL_BZIP2)
|
|
#define BOOT_HEAP_SIZE 0x400000
|
|
#elif defined(CONFIG_KERNEL_ZSTD)
|
|
#define BOOT_HEAP_SIZE 0x30000
|
|
#else
|
|
#define BOOT_HEAP_SIZE 0x10000
|
|
#endif
|
|
|
|
static unsigned long free_mem_ptr = (unsigned long) _end;
|
|
static unsigned long free_mem_end_ptr = (unsigned long) _end + BOOT_HEAP_SIZE;
|
|
|
|
#ifdef CONFIG_KERNEL_GZIP
|
|
#include "../../../../lib/decompress_inflate.c"
|
|
#endif
|
|
|
|
#ifdef CONFIG_KERNEL_BZIP2
|
|
#include "../../../../lib/decompress_bunzip2.c"
|
|
#endif
|
|
|
|
#ifdef CONFIG_KERNEL_LZ4
|
|
#include "../../../../lib/decompress_unlz4.c"
|
|
#endif
|
|
|
|
#ifdef CONFIG_KERNEL_LZMA
|
|
#include "../../../../lib/decompress_unlzma.c"
|
|
#endif
|
|
|
|
#ifdef CONFIG_KERNEL_LZO
|
|
#include "../../../../lib/decompress_unlzo.c"
|
|
#endif
|
|
|
|
#ifdef CONFIG_KERNEL_XZ
|
|
#include "../../../../lib/decompress_unxz.c"
|
|
#endif
|
|
|
|
#ifdef CONFIG_KERNEL_ZSTD
|
|
#include "../../../../lib/decompress_unzstd.c"
|
|
#endif
|
|
|
|
#define decompress_offset ALIGN((unsigned long)_end + BOOT_HEAP_SIZE, PAGE_SIZE)
|
|
|
|
unsigned long mem_safe_offset(void)
|
|
{
|
|
/*
|
|
* due to 4MB HEAD_SIZE for bzip2
|
|
* 'decompress_offset + vmlinux.image_size' could be larger than
|
|
* kernel at final position + its .bss, so take the larger of two
|
|
*/
|
|
return max(decompress_offset + vmlinux.image_size,
|
|
vmlinux.default_lma + vmlinux.image_size + vmlinux.bss_size);
|
|
}
|
|
|
|
void *decompress_kernel(void)
|
|
{
|
|
void *output = (void *)decompress_offset;
|
|
|
|
__decompress(_compressed_start, _compressed_end - _compressed_start,
|
|
NULL, NULL, output, vmlinux.image_size, NULL, error);
|
|
return output;
|
|
}
|