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Linux kernel mirror (for testing)
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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * arch/m32r/boot/compressed/misc.c
4 *
5 * This is a collection of several routines from gzip-1.0.3
6 * adapted for Linux.
7 *
8 * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
9 *
10 * Adapted for SH by Stuart Menefy, Aug 1999
11 *
12 * 2003-02-12: Support M32R by Takeo Takahashi
13 */
14
15/*
16 * gzip declarations
17 */
18#define STATIC static
19
20#undef memset
21#undef memcpy
22#define memzero(s, n) memset ((s), 0, (n))
23
24static void error(char *m);
25
26#include "m32r_sio.c"
27
28static unsigned long free_mem_ptr;
29static unsigned long free_mem_end_ptr;
30
31#ifdef CONFIG_KERNEL_BZIP2
32void *memset(void *s, int c, size_t n)
33{
34 char *ss = s;
35
36 while (n--)
37 *ss++ = c;
38 return s;
39}
40#endif
41
42#ifdef CONFIG_KERNEL_GZIP
43void *memcpy(void *dest, const void *src, size_t n)
44{
45 char *d = dest;
46 const char *s = src;
47 while (n--)
48 *d++ = *s++;
49
50 return dest;
51}
52
53#define BOOT_HEAP_SIZE 0x10000
54#include "../../../../lib/decompress_inflate.c"
55#endif
56
57#ifdef CONFIG_KERNEL_BZIP2
58#define BOOT_HEAP_SIZE 0x400000
59#include "../../../../lib/decompress_bunzip2.c"
60#endif
61
62#ifdef CONFIG_KERNEL_LZMA
63#define BOOT_HEAP_SIZE 0x10000
64#include "../../../../lib/decompress_unlzma.c"
65#endif
66
67static void error(char *x)
68{
69 puts("\n\n");
70 puts(x);
71 puts("\n\n -- System halted");
72
73 while(1); /* Halt */
74}
75
76void
77decompress_kernel(int mmu_on, unsigned char *zimage_data,
78 unsigned int zimage_len, unsigned long heap)
79{
80 unsigned char *input_data = zimage_data;
81 int input_len = zimage_len;
82 unsigned char *output_data;
83
84 output_data = (unsigned char *)CONFIG_MEMORY_START + 0x2000
85 + (mmu_on ? 0x80000000 : 0);
86 free_mem_ptr = heap;
87 free_mem_end_ptr = free_mem_ptr + BOOT_HEAP_SIZE;
88
89 puts("\nDecompressing Linux... ");
90 __decompress(input_data, input_len, NULL, NULL, output_data, 0,
91 NULL, error);
92 puts("done.\nBooting the kernel.\n");
93}