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 | |
73 | int puts(const char *s) |
74 | { |
75 | /* This should be updated to use the sh-sci routines */ |
76 | return 0; |
77 | } |
78 | |
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 | |
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 | |
98 | static void error(char *x) |
99 | { |
100 | puts(s: "\n\n" ); |
101 | puts(s: x); |
102 | puts(s: "\n\n -- System halted" ); |
103 | |
104 | while(1); /* Halt */ |
105 | } |
106 | |
107 | const unsigned long __stack_chk_guard = 0x000a0dff; |
108 | |
109 | void __stack_chk_fail(void) |
110 | { |
111 | error(x: "stack-protector: Kernel stack is corrupted\n" ); |
112 | } |
113 | |
114 | /* Needed because vmlinux.lds.h references this */ |
115 | void ftrace_stub(void) |
116 | { |
117 | } |
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 | |
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(s: "Uncompressing Linux... " ); |
142 | cache_control(CACHE_ENABLE); |
143 | __decompress(buf: input_data, len: input_len, NULL, NULL, out_buf: output, out_len: 0, NULL, error); |
144 | cache_control(CACHE_DISABLE); |
145 | puts(s: "Ok, booting the kernel.\n" ); |
146 | } |
147 | |