1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * arch/h8300/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 h8300 by Yoshinori Sato 2006
11 */
12
13#include <linux/uaccess.h>
14
15/*
16 * gzip declarations
17 */
18
19#define OF(args)  args
20#define STATIC static
21
22#undef memset
23#undef memcpy
24#define memzero(s, n)     memset((s), (0), (n))
25
26extern int _end;
27static unsigned long free_mem_ptr;
28static unsigned long free_mem_end_ptr;
29
30extern char input_data[];
31extern int input_len;
32extern char output[];
33
34#define HEAP_SIZE             0x10000
35
36#ifdef CONFIG_KERNEL_GZIP
37#include "../../../../lib/decompress_inflate.c"
38#endif
39
40#ifdef CONFIG_KERNEL_LZO
41#include "../../../../lib/decompress_unlzo.c"
42#endif
43
44void *memset(void *s, int c, size_t n)
45{
46	int i;
47	char *ss = (char *)s;
48
49	for (i = 0; i < n; i++)
50		ss[i] = c;
51	return s;
52}
53
54void *memcpy(void *dest, const void *src, size_t n)
55{
56	int i;
57	char *d = (char *)dest, *s = (char *)src;
58
59	for (i = 0; i < n; i++)
60		d[i] = s[i];
61	return dest;
62}
63
64static void error(char *x)
65{
66	while (1)
67		;	/* Halt */
68}
69
70void decompress_kernel(void)
71{
72	free_mem_ptr = (unsigned long)&_end;
73	free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
74
75	__decompress(input_data, input_len, NULL, NULL, output, 0, NULL, error);
76}