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140 lines
3.3 KiB
140 lines
3.3 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright 2001 MontaVista Software Inc. |
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* Author: Matt Porter <[email protected]> |
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* |
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* Copyright (C) 2009 Lemote, Inc. |
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* Author: Wu Zhangjin <[email protected]> |
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*/ |
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#define DISABLE_BRANCH_PROFILING |
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#include <linux/types.h> |
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#include <linux/kernel.h> |
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#include <linux/string.h> |
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#include <linux/libfdt.h> |
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#include <asm/addrspace.h> |
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#include <asm/unaligned.h> |
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#include <asm-generic/vmlinux.lds.h> |
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/* |
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* These two variables specify the free mem region |
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* that can be used for temporary malloc area |
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*/ |
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unsigned long free_mem_ptr; |
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unsigned long free_mem_end_ptr; |
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/* The linker tells us where the image is. */ |
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extern unsigned char __image_begin, __image_end; |
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/* debug interfaces */ |
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#ifdef CONFIG_DEBUG_ZBOOT |
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extern void puts(const char *s); |
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extern void puthex(unsigned long long val); |
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#else |
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#define puts(s) do {} while (0) |
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#define puthex(val) do {} while (0) |
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#endif |
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extern char __appended_dtb[]; |
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void error(char *x) |
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{ |
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puts("\n\n"); |
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puts(x); |
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puts("\n\n -- System halted"); |
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while (1) |
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; /* Halt */ |
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} |
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/* activate the code for pre-boot environment */ |
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#define STATIC static |
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#ifdef CONFIG_KERNEL_GZIP |
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#include "../../../../lib/decompress_inflate.c" |
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#endif |
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#ifdef CONFIG_KERNEL_BZIP2 |
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#include "../../../../lib/decompress_bunzip2.c" |
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#endif |
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#ifdef CONFIG_KERNEL_LZ4 |
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#include "../../../../lib/decompress_unlz4.c" |
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#endif |
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#ifdef CONFIG_KERNEL_LZMA |
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#include "../../../../lib/decompress_unlzma.c" |
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#endif |
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#ifdef CONFIG_KERNEL_LZO |
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#include "../../../../lib/decompress_unlzo.c" |
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#endif |
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#ifdef CONFIG_KERNEL_XZ |
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#include "../../../../lib/decompress_unxz.c" |
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#endif |
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#ifdef CONFIG_KERNEL_ZSTD |
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#include "../../../../lib/decompress_unzstd.c" |
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#endif |
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const unsigned long __stack_chk_guard = 0x000a0dff; |
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void __stack_chk_fail(void) |
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{ |
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error("stack-protector: Kernel stack is corrupted\n"); |
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} |
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void decompress_kernel(unsigned long boot_heap_start) |
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{ |
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unsigned long zimage_start, zimage_size; |
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zimage_start = (unsigned long)(&__image_begin); |
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zimage_size = (unsigned long)(&__image_end) - |
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(unsigned long)(&__image_begin); |
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puts("zimage at: "); |
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puthex(zimage_start); |
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puts(" "); |
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puthex(zimage_size + zimage_start); |
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puts("\n"); |
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/* This area are prepared for mallocing when decompressing */ |
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free_mem_ptr = boot_heap_start; |
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free_mem_end_ptr = boot_heap_start + BOOT_HEAP_SIZE; |
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/* Display standard Linux/MIPS boot prompt */ |
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puts("Uncompressing Linux at load address "); |
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puthex(VMLINUX_LOAD_ADDRESS_ULL); |
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puts("\n"); |
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/* Decompress the kernel with according algorithm */ |
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__decompress((char *)zimage_start, zimage_size, 0, 0, |
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(void *)VMLINUX_LOAD_ADDRESS_ULL, 0, 0, error); |
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if (IS_ENABLED(CONFIG_MIPS_RAW_APPENDED_DTB) && |
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fdt_magic((void *)&__appended_dtb) == FDT_MAGIC) { |
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unsigned int image_size, dtb_size; |
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dtb_size = fdt_totalsize((void *)&__appended_dtb); |
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/* last four bytes is always image size in little endian */ |
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image_size = get_unaligned_le32((void *)&__image_end - 4); |
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/* The device tree's address must be properly aligned */ |
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image_size = ALIGN(image_size, STRUCT_ALIGNMENT); |
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puts("Copy device tree to address "); |
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puthex(VMLINUX_LOAD_ADDRESS_ULL + image_size); |
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puts("\n"); |
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/* copy dtb to where the booted kernel will expect it */ |
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memcpy((void *)VMLINUX_LOAD_ADDRESS_ULL + image_size, |
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__appended_dtb, dtb_size); |
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} |
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/* FIXME: should we flush cache here? */ |
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puts("Now, booting the kernel...\n"); |
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}
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