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
31static 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
56static 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
65void
66decompress_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}