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