1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * arch/sh/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 * Modified to use standard LinuxSH BIOS by Greg Banks 7Jul2000
13 */
14
15 #include <linux/uaccess.h>
16 #include <asm/addrspace.h>
17 #include <asm/page.h>
18
19 /*
20 * gzip declarations
21 */
22
23 #define STATIC static
24
25 #undef memset
26 #undef memcpy
27 #define memzero(s, n) memset ((s), 0, (n))
28
29 /* cache.c */
30 #define CACHE_ENABLE 0
31 #define CACHE_DISABLE 1
32 int cache_control(unsigned int command);
33
34 extern char input_data[];
35 extern int input_len;
36 static unsigned char *output;
37
38 static void error(char *m);
39
40 int puts(const char *);
41
42 extern int _text; /* Defined in vmlinux.lds.S */
43 extern int _end;
44 static unsigned long free_mem_ptr;
45 static unsigned long free_mem_end_ptr;
46
47 #ifdef CONFIG_HAVE_KERNEL_BZIP2
48 #define HEAP_SIZE 0x400000
49 #else
50 #define HEAP_SIZE 0x10000
51 #endif
52
53 #ifdef CONFIG_KERNEL_GZIP
54 #include "../../../../lib/decompress_inflate.c"
55 #endif
56
57 #ifdef CONFIG_KERNEL_BZIP2
58 #include "../../../../lib/decompress_bunzip2.c"
59 #endif
60
61 #ifdef CONFIG_KERNEL_LZMA
62 #include "../../../../lib/decompress_unlzma.c"
63 #endif
64
65 #ifdef CONFIG_KERNEL_XZ
66 #include "../../../../lib/decompress_unxz.c"
67 #endif
68
69 #ifdef CONFIG_KERNEL_LZO
70 #include "../../../../lib/decompress_unlzo.c"
71 #endif
72
puts(const char * s)73 int puts(const char *s)
74 {
75 /* This should be updated to use the sh-sci routines */
76 return 0;
77 }
78
memset(void * s,int c,size_t n)79 void* memset(void* s, int c, size_t n)
80 {
81 int i;
82 char *ss = (char*)s;
83
84 for (i=0;i<n;i++) ss[i] = c;
85 return s;
86 }
87
memcpy(void * __dest,__const void * __src,size_t __n)88 void* memcpy(void* __dest, __const void* __src,
89 size_t __n)
90 {
91 int i;
92 char *d = (char *)__dest, *s = (char *)__src;
93
94 for (i=0;i<__n;i++) d[i] = s[i];
95 return __dest;
96 }
97
error(char * x)98 static void error(char *x)
99 {
100 puts("\n\n");
101 puts(x);
102 puts("\n\n -- System halted");
103
104 while(1); /* Halt */
105 }
106
107 const unsigned long __stack_chk_guard = 0x000a0dff;
108
__stack_chk_fail(void)109 void __stack_chk_fail(void)
110 {
111 error("stack-protector: Kernel stack is corrupted\n");
112 }
113
114 /* Needed because vmlinux.lds.h references this */
ftrace_stub(void)115 void ftrace_stub(void)
116 {
117 }
arch_ftrace_ops_list_func(void)118 void arch_ftrace_ops_list_func(void)
119 {
120 }
121
122 #define stackalign 4
123
124 #define STACK_SIZE (4096)
125 long __attribute__ ((aligned(stackalign))) user_stack[STACK_SIZE];
126 long *stack_start = &user_stack[STACK_SIZE];
127
decompress_kernel(void)128 void decompress_kernel(void)
129 {
130 unsigned long output_addr;
131
132 output_addr = __pa((unsigned long)&_text+PAGE_SIZE);
133 #if defined(CONFIG_29BIT)
134 output_addr |= P2SEG;
135 #endif
136
137 output = (unsigned char *)output_addr;
138 free_mem_ptr = (unsigned long)&_end;
139 free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
140
141 puts("Uncompressing Linux... ");
142 cache_control(CACHE_ENABLE);
143 __decompress(input_data, input_len, NULL, NULL, output, 0, NULL, error);
144 cache_control(CACHE_DISABLE);
145 puts("Ok, booting the kernel.\n");
146 }
147