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1/*
2 * misc.c
3 *
4 * This is a collection of several routines from gzip-1.0.3
5 * adapted for Linux.
6 *
7 * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
8 *
9 * Modified for ARM Linux by Russell King
10 *
11 * Nicolas Pitre <nico@visuaide.com> 1999/04/14 :
12 * For this code to run directly from Flash, all constant variables must
13 * be marked with 'const' and all other variables initialized at run-time
14 * only. This way all non constant variables will end up in the bss segment,
15 * which should point to addresses in RAM and cleared to 0 on start.
16 * This allows for a much quicker boot time.
17 */
18
19unsigned int __machine_arch_type;
20
21#include <linux/compiler.h> /* for inline */
22#include <linux/types.h>
23#include <linux/linkage.h>
24
25static void putstr(const char *ptr);
26extern void error(char *x);
27
28#include CONFIG_UNCOMPRESS_INCLUDE
29
30#ifdef CONFIG_DEBUG_ICEDCC
31
32#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7)
33
34static void icedcc_putc(int ch)
35{
36 int status, i = 0x4000000;
37
38 do {
39 if (--i < 0)
40 return;
41
42 asm volatile ("mrc p14, 0, %0, c0, c1, 0" : "=r" (status));
43 } while (status & (1 << 29));
44
45 asm("mcr p14, 0, %0, c0, c5, 0" : : "r" (ch));
46}
47
48
49#elif defined(CONFIG_CPU_XSCALE)
50
51static void icedcc_putc(int ch)
52{
53 int status, i = 0x4000000;
54
55 do {
56 if (--i < 0)
57 return;
58
59 asm volatile ("mrc p14, 0, %0, c14, c0, 0" : "=r" (status));
60 } while (status & (1 << 28));
61
62 asm("mcr p14, 0, %0, c8, c0, 0" : : "r" (ch));
63}
64
65#else
66
67static void icedcc_putc(int ch)
68{
69 int status, i = 0x4000000;
70
71 do {
72 if (--i < 0)
73 return;
74
75 asm volatile ("mrc p14, 0, %0, c0, c0, 0" : "=r" (status));
76 } while (status & 2);
77
78 asm("mcr p14, 0, %0, c1, c0, 0" : : "r" (ch));
79}
80
81#endif
82
83#define putc(ch) icedcc_putc(ch)
84#endif
85
86static void putstr(const char *ptr)
87{
88 char c;
89
90 while ((c = *ptr++) != '\0') {
91 if (c == '\n')
92 putc('\r');
93 putc(c);
94 }
95
96 flush();
97}
98
99/*
100 * gzip declarations
101 */
102extern char input_data[];
103extern char input_data_end[];
104
105unsigned char *output_data;
106
107unsigned long free_mem_ptr;
108unsigned long free_mem_end_ptr;
109
110#ifndef arch_error
111#define arch_error(x)
112#endif
113
114void error(char *x)
115{
116 arch_error(x);
117
118 putstr("\n\n");
119 putstr(x);
120 putstr("\n\n -- System halted");
121
122 while(1); /* Halt */
123}
124
125asmlinkage void __div0(void)
126{
127 error("Attempting division by 0!");
128}
129
130unsigned long __stack_chk_guard;
131
132void __stack_chk_guard_setup(void)
133{
134 __stack_chk_guard = 0x000a0dff;
135}
136
137void __stack_chk_fail(void)
138{
139 error("stack-protector: Kernel stack is corrupted\n");
140}
141
142extern int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x));
143
144
145void
146decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p,
147 unsigned long free_mem_ptr_end_p,
148 int arch_id)
149{
150 int ret;
151
152 __stack_chk_guard_setup();
153
154 output_data = (unsigned char *)output_start;
155 free_mem_ptr = free_mem_ptr_p;
156 free_mem_end_ptr = free_mem_ptr_end_p;
157 __machine_arch_type = arch_id;
158
159 arch_decomp_setup();
160
161 putstr("Uncompressing Linux...");
162 ret = do_decompress(input_data, input_data_end - input_data,
163 output_data, error);
164 if (ret)
165 error("decompressor returned an error");
166 else
167 putstr(" done, booting the kernel.\n");
168}
1/*
2 * misc.c
3 *
4 * This is a collection of several routines from gzip-1.0.3
5 * adapted for Linux.
6 *
7 * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
8 *
9 * Modified for ARM Linux by Russell King
10 *
11 * Nicolas Pitre <nico@visuaide.com> 1999/04/14 :
12 * For this code to run directly from Flash, all constant variables must
13 * be marked with 'const' and all other variables initialized at run-time
14 * only. This way all non constant variables will end up in the bss segment,
15 * which should point to addresses in RAM and cleared to 0 on start.
16 * This allows for a much quicker boot time.
17 */
18
19unsigned int __machine_arch_type;
20
21#include <linux/compiler.h> /* for inline */
22#include <linux/types.h>
23#include <linux/linkage.h>
24
25static void putstr(const char *ptr);
26extern void error(char *x);
27
28#include CONFIG_UNCOMPRESS_INCLUDE
29
30#ifdef CONFIG_DEBUG_ICEDCC
31
32#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7)
33
34static void icedcc_putc(int ch)
35{
36 int status, i = 0x4000000;
37
38 do {
39 if (--i < 0)
40 return;
41
42 asm volatile ("mrc p14, 0, %0, c0, c1, 0" : "=r" (status));
43 } while (status & (1 << 29));
44
45 asm("mcr p14, 0, %0, c0, c5, 0" : : "r" (ch));
46}
47
48
49#elif defined(CONFIG_CPU_XSCALE)
50
51static void icedcc_putc(int ch)
52{
53 int status, i = 0x4000000;
54
55 do {
56 if (--i < 0)
57 return;
58
59 asm volatile ("mrc p14, 0, %0, c14, c0, 0" : "=r" (status));
60 } while (status & (1 << 28));
61
62 asm("mcr p14, 0, %0, c8, c0, 0" : : "r" (ch));
63}
64
65#else
66
67static void icedcc_putc(int ch)
68{
69 int status, i = 0x4000000;
70
71 do {
72 if (--i < 0)
73 return;
74
75 asm volatile ("mrc p14, 0, %0, c0, c0, 0" : "=r" (status));
76 } while (status & 2);
77
78 asm("mcr p14, 0, %0, c1, c0, 0" : : "r" (ch));
79}
80
81#endif
82
83#define putc(ch) icedcc_putc(ch)
84#endif
85
86static void putstr(const char *ptr)
87{
88 char c;
89
90 while ((c = *ptr++) != '\0') {
91 if (c == '\n')
92 putc('\r');
93 putc(c);
94 }
95
96 flush();
97}
98
99/*
100 * gzip declarations
101 */
102extern char input_data[];
103extern char input_data_end[];
104
105unsigned char *output_data;
106
107unsigned long free_mem_ptr;
108unsigned long free_mem_end_ptr;
109
110#ifndef arch_error
111#define arch_error(x)
112#endif
113
114void error(char *x)
115{
116 arch_error(x);
117
118 putstr("\n\n");
119 putstr(x);
120 putstr("\n\n -- System halted");
121
122 while(1); /* Halt */
123}
124
125asmlinkage void __div0(void)
126{
127 error("Attempting division by 0!");
128}
129
130unsigned long __stack_chk_guard;
131
132void __stack_chk_guard_setup(void)
133{
134 __stack_chk_guard = 0x000a0dff;
135}
136
137void __stack_chk_fail(void)
138{
139 error("stack-protector: Kernel stack is corrupted\n");
140}
141
142extern int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x));
143
144
145void
146decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p,
147 unsigned long free_mem_ptr_end_p,
148 int arch_id)
149{
150 int ret;
151
152 __stack_chk_guard_setup();
153
154 output_data = (unsigned char *)output_start;
155 free_mem_ptr = free_mem_ptr_p;
156 free_mem_end_ptr = free_mem_ptr_end_p;
157 __machine_arch_type = arch_id;
158
159 arch_decomp_setup();
160
161 putstr("Uncompressing Linux...");
162 ret = do_decompress(input_data, input_data_end - input_data,
163 output_data, error);
164 if (ret)
165 error("decompressor returned an error");
166 else
167 putstr(" done, booting the kernel.\n");
168}