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
memset(void * s,int c,size_t n)31 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
memcpy(void * dest,const void * src,size_t n)42 void *memcpy(void *dest, const void *src, size_t n)
43 {
44 char *d = dest;
45 const char *s = src;
46 while (n--)
47 *d++ = *s++;
48
49 return dest;
50 }
51
52 #define BOOT_HEAP_SIZE 0x10000
53 #include "../../../../lib/decompress_inflate.c"
54 #endif
55
56 #ifdef CONFIG_KERNEL_BZIP2
57 #define BOOT_HEAP_SIZE 0x400000
58 #include "../../../../lib/decompress_bunzip2.c"
59 #endif
60
61 #ifdef CONFIG_KERNEL_LZMA
62 #define BOOT_HEAP_SIZE 0x10000
63 #include "../../../../lib/decompress_unlzma.c"
64 #endif
65
error(char * x)66 static void error(char *x)
67 {
68 puts("\n\n");
69 puts(x);
70 puts("\n\n -- System halted");
71
72 while(1); /* Halt */
73 }
74
75 void
decompress_kernel(int mmu_on,unsigned char * zimage_data,unsigned int zimage_len,unsigned long heap)76 decompress_kernel(int mmu_on, unsigned char *zimage_data,
77 unsigned int zimage_len, unsigned long heap)
78 {
79 unsigned char *input_data = zimage_data;
80 int input_len = zimage_len;
81 unsigned char *output_data;
82
83 output_data = (unsigned char *)CONFIG_MEMORY_START + 0x2000
84 + (mmu_on ? 0x80000000 : 0);
85 free_mem_ptr = heap;
86 free_mem_end_ptr = free_mem_ptr + BOOT_HEAP_SIZE;
87
88 puts("\nDecompressing Linux... ");
89 decompress(input_data, input_len, NULL, NULL, output_data, NULL, error);
90 puts("done.\nBooting the kernel.\n");
91 }
92