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
23static void error(char *m);
24
25#include "m32r_sio.c"
26
27static unsigned long free_mem_ptr;
28static unsigned long free_mem_end_ptr;
29
30#ifdef CONFIG_KERNEL_BZIP2
31void *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
42void *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
66static 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
75void
76decompress_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, 0,
90			NULL, error);
91	puts("done.\nBooting the kernel.\n");
92}
93