Linux Kernel  3.7.1
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misc.c
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1 /*
2  * linux/arch/unicore32/boot/compressed/misc.c
3  *
4  * Code specific to PKUnity SoC and UniCore ISA
5  *
6  * Copyright (C) 2001-2010 GUAN Xue-tao
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  */
12 
13 #include <asm/unaligned.h>
14 #include <mach/uncompress.h>
15 
16 /*
17  * gzip delarations
18  */
19 unsigned char *output_data;
20 unsigned long output_ptr;
21 
22 unsigned int free_mem_ptr;
23 unsigned int free_mem_end_ptr;
24 
25 #define STATIC static
26 #define STATIC_RW_DATA /* non-static please */
27 
28 /*
29  * arch-dependent implementations
30  */
31 #ifndef ARCH_HAVE_DECOMP_ERROR
32 #define arch_decomp_error(x)
33 #endif
34 
35 #ifndef ARCH_HAVE_DECOMP_SETUP
36 #define arch_decomp_setup()
37 #endif
38 
39 #ifndef ARCH_HAVE_DECOMP_PUTS
40 #define arch_decomp_puts(p)
41 #endif
42 
43 void *memcpy(void *dest, const void *src, size_t n)
44 {
45  int i = 0;
46  unsigned char *d = (unsigned char *)dest, *s = (unsigned char *)src;
47 
48  for (i = n >> 3; i > 0; i--) {
49  *d++ = *s++;
50  *d++ = *s++;
51  *d++ = *s++;
52  *d++ = *s++;
53  *d++ = *s++;
54  *d++ = *s++;
55  *d++ = *s++;
56  *d++ = *s++;
57  }
58 
59  if (n & 1 << 2) {
60  *d++ = *s++;
61  *d++ = *s++;
62  *d++ = *s++;
63  *d++ = *s++;
64  }
65 
66  if (n & 1 << 1) {
67  *d++ = *s++;
68  *d++ = *s++;
69  }
70 
71  if (n & 1)
72  *d++ = *s++;
73 
74  return dest;
75 }
76 
77 void error(char *x)
78 {
79  arch_decomp_puts("\n\n");
81  arch_decomp_puts("\n\n -- System halted");
82 
84 
85  for (;;)
86  ; /* Halt */
87 }
88 
89 /* Heap size should be adjusted for different decompress method */
90 #ifdef CONFIG_KERNEL_GZIP
91 #include "../../../../lib/decompress_inflate.c"
92 #endif
93 
94 #ifdef CONFIG_KERNEL_BZIP2
95 #include "../../../../lib/decompress_bunzip2.c"
96 #endif
97 
98 #ifdef CONFIG_KERNEL_LZO
99 #include "../../../../lib/decompress_unlzo.c"
100 #endif
101 
102 #ifdef CONFIG_KERNEL_LZMA
103 #include "../../../../lib/decompress_unlzma.c"
104 #endif
105 
106 unsigned long decompress_kernel(unsigned long output_start,
107  unsigned long free_mem_ptr_p,
108  unsigned long free_mem_ptr_end_p)
109 {
110  unsigned char *tmp;
111 
112  output_data = (unsigned char *)output_start;
113  free_mem_ptr = free_mem_ptr_p;
114  free_mem_end_ptr = free_mem_ptr_end_p;
115 
117 
118  tmp = (unsigned char *) (((unsigned long)input_data_end) - 4);
120 
121  arch_decomp_puts("Uncompressing Linux...");
122  decompress(input_data, input_data_end - input_data, NULL, NULL,
124  arch_decomp_puts(" done, booting the kernel.\n");
125  return output_ptr;
126 }