2 * Copyright 2001 MontaVista Software Inc.
3 * Author: Matt Porter <mporter@mvista.com>
5 * Copyright (C) 2009 Lemote, Inc.
6 * Author: Wu Zhangjin <wuzhangjin@gmail.com>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
14 #include <linux/types.h>
15 #include <linux/kernel.h>
17 #include <asm/addrspace.h>
20 * These two variables specify the free mem region
21 * that can be used for temporary malloc area
23 unsigned long free_mem_ptr
;
24 unsigned long free_mem_end_ptr
;
26 /* The linker tells us where the image is. */
27 extern unsigned char __image_begin
, __image_end
;
29 /* debug interfaces */
30 extern void puts(const char *s
);
31 extern void puthex(unsigned long long val
);
37 puts("\n\n -- System halted");
43 /* activate the code for pre-boot environment */
46 #ifdef CONFIG_KERNEL_GZIP
47 void *memcpy(void *dest
, const void *src
, size_t n
)
53 for (i
= 0; i
< n
; i
++)
57 #include "../../../../lib/decompress_inflate.c"
60 #ifdef CONFIG_KERNEL_BZIP2
61 void *memset(void *s
, int c
, size_t n
)
66 for (i
= 0; i
< n
; i
++)
70 #include "../../../../lib/decompress_bunzip2.c"
73 #ifdef CONFIG_KERNEL_LZMA
74 #include "../../../../lib/decompress_unlzma.c"
77 #ifdef CONFIG_KERNEL_LZO
78 #include "../../../../lib/decompress_unlzo.c"
81 void decompress_kernel(unsigned long boot_heap_start
)
83 unsigned long zimage_start
, zimage_size
;
85 zimage_start
= (unsigned long)(&__image_begin
);
86 zimage_size
= (unsigned long)(&__image_end
) -
87 (unsigned long)(&__image_begin
);
92 puthex(zimage_size
+ zimage_start
);
95 /* This area are prepared for mallocing when decompressing */
96 free_mem_ptr
= boot_heap_start
;
97 free_mem_end_ptr
= boot_heap_start
+ BOOT_HEAP_SIZE
;
99 /* Display standard Linux/MIPS boot prompt */
100 puts("Uncompressing Linux at load address ");
101 puthex(VMLINUX_LOAD_ADDRESS_ULL
);
104 /* Decompress the kernel with according algorithm */
105 decompress((char *)zimage_start
, zimage_size
, 0, 0,
106 (void *)VMLINUX_LOAD_ADDRESS_ULL
, 0, error
);
108 /* FIXME: should we flush cache here? */
109 puts("Now, booting the kernel...\n");