| 1 | // SPDX-License-Identifier: GPL-2.0 |
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| 2 | /* |
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| 3 | * Definitions and wrapper functions for kernel decompressor |
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| 4 | * |
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| 5 | * Copyright IBM Corp. 2010 |
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| 6 | * |
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| 7 | * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com> |
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| 8 | */ |
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| 9 | |
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| 10 | #include <linux/kernel.h> |
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| 11 | #include <linux/string.h> |
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| 12 | #include <asm/boot_data.h> |
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| 13 | #include <asm/page.h> |
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| 14 | #include "decompressor.h" |
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| 15 | #include "boot.h" |
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| 16 | |
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| 17 | /* |
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| 18 | * gzip declarations |
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| 19 | */ |
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| 20 | #define STATIC static |
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| 21 | |
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| 22 | #undef memset |
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| 23 | #undef memcpy |
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| 24 | #undef memmove |
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| 25 | #define memmove memmove |
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| 26 | #define memzero(s, n) memset((s), 0, (n)) |
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| 27 | |
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| 28 | #if defined(CONFIG_KERNEL_BZIP2) |
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| 29 | #define BOOT_HEAP_SIZE 0x400000 |
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| 30 | #elif defined(CONFIG_KERNEL_ZSTD) |
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| 31 | #define BOOT_HEAP_SIZE 0x30000 |
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| 32 | #else |
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| 33 | #define BOOT_HEAP_SIZE 0x10000 |
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| 34 | #endif |
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| 35 | |
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| 36 | static unsigned long free_mem_ptr = (unsigned long) _end; |
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| 37 | static unsigned long free_mem_end_ptr = (unsigned long) _end + BOOT_HEAP_SIZE; |
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| 38 | |
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| 39 | #ifdef CONFIG_KERNEL_GZIP |
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| 40 | #include "../../../../lib/decompress_inflate.c" |
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| 41 | #endif |
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| 42 | |
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| 43 | #ifdef CONFIG_KERNEL_BZIP2 |
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| 44 | #include "../../../../lib/decompress_bunzip2.c" |
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| 45 | #endif |
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| 46 | |
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| 47 | #ifdef CONFIG_KERNEL_LZ4 |
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| 48 | #include "../../../../lib/decompress_unlz4.c" |
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| 49 | #endif |
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| 50 | |
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| 51 | #ifdef CONFIG_KERNEL_LZMA |
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| 52 | #include "../../../../lib/decompress_unlzma.c" |
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| 53 | #endif |
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| 54 | |
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| 55 | #ifdef CONFIG_KERNEL_LZO |
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| 56 | #include "../../../../lib/decompress_unlzo.c" |
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| 57 | #endif |
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| 58 | |
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| 59 | #ifdef CONFIG_KERNEL_XZ |
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| 60 | #include "../../../../lib/decompress_unxz.c" |
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| 61 | #endif |
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| 62 | |
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| 63 | #ifdef CONFIG_KERNEL_ZSTD |
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| 64 | #include "../../../../lib/decompress_unzstd.c" |
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| 65 | #endif |
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| 66 | |
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| 67 | static void decompress_error(char *m) |
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| 68 | { |
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| 69 | if (bootdebug) |
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| 70 | boot_rb_dump(); |
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| 71 | boot_panic("Decompression error: %s\n" , m); |
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| 72 | } |
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| 73 | |
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| 74 | unsigned long mem_safe_offset(void) |
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| 75 | { |
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| 76 | return ALIGN(free_mem_end_ptr, PAGE_SIZE); |
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| 77 | } |
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| 78 | |
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| 79 | void deploy_kernel(void *output) |
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| 80 | { |
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| 81 | __decompress(buf: _compressed_start, len: _compressed_end - _compressed_start, |
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| 82 | NULL, NULL, out_buf: output, vmlinux.image_size, NULL, error: decompress_error); |
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| 83 | } |
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| 84 | |
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