m32r: bzip2/lzma kernel compression support
[linux-2.6.git] / arch / m32r / boot / compressed / misc.c
1 /*
2  * arch/m32r/boot/compressed/misc.c
3  *
4  * This is a collection of several routines from gzip-1.0.3
5  * adapted for Linux.
6  *
7  * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
8  *
9  * Adapted for SH by Stuart Menefy, Aug 1999
10  *
11  * 2003-02-12:  Support M32R by Takeo Takahashi
12  */
13
14 /*
15  * gzip declarations
16  */
17 #define STATIC static
18
19 #undef memset
20 #undef memcpy
21 #define memzero(s, n)     memset ((s), 0, (n))
22
23 static void error(char *m);
24
25 #include "m32r_sio.c"
26
27 static unsigned long free_mem_ptr;
28 static unsigned long free_mem_end_ptr;
29
30 #ifdef CONFIG_KERNEL_BZIP2
31 static void *memset(void *s, int c, size_t n)
32 {
33         char *ss = s;
34
35         while (n--)
36                 *ss++ = c;
37         return s;
38 }
39 #endif
40
41 #ifdef CONFIG_KERNEL_GZIP
42 #define BOOT_HEAP_SIZE             0x10000
43 #include "../../../../lib/decompress_inflate.c"
44 #endif
45
46 #ifdef CONFIG_KERNEL_BZIP2
47 #define BOOT_HEAP_SIZE             0x400000
48 #include "../../../../lib/decompress_bunzip2.c"
49 #endif
50
51 #ifdef CONFIG_KERNEL_LZMA
52 #define BOOT_HEAP_SIZE             0x10000
53 #include "../../../../lib/decompress_unlzma.c"
54 #endif
55
56 static void error(char *x)
57 {
58         puts("\n\n");
59         puts(x);
60         puts("\n\n -- System halted");
61
62         while(1);       /* Halt */
63 }
64
65 void
66 decompress_kernel(int mmu_on, unsigned char *zimage_data,
67                   unsigned int zimage_len, unsigned long heap)
68 {
69         unsigned char *input_data = zimage_data;
70         int input_len = zimage_len;
71         unsigned char *output_data;
72
73         output_data = (unsigned char *)CONFIG_MEMORY_START + 0x2000
74                 + (mmu_on ? 0x80000000 : 0);
75         free_mem_ptr = heap;
76         free_mem_end_ptr = free_mem_ptr + BOOT_HEAP_SIZE;
77
78         puts("\nDecompressing Linux... ");
79         decompress(input_data, input_len, NULL, NULL, output_data, NULL, error);
80         puts("done.\nBooting the kernel.\n");
81 }