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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#define _LINUX_STRING_H_
22
23#include <linux/compiler.h> /* for inline */
24#include <linux/types.h> /* for size_t */
25#include <linux/stddef.h> /* for NULL */
26#include <linux/linkage.h>
27#include <asm/string.h>
28
29
30static void putstr(const char *ptr);
31extern void error(char *x);
32
33#include <mach/uncompress.h>
34
35#ifdef CONFIG_DEBUG_ICEDCC
36
37#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7)
38
39static void icedcc_putc(int ch)
40{
41 int status, i = 0x4000000;
42
43 do {
44 if (--i < 0)
45 return;
46
47 asm volatile ("mrc p14, 0, %0, c0, c1, 0" : "=r" (status));
48 } while (status & (1 << 29));
49
50 asm("mcr p14, 0, %0, c0, c5, 0" : : "r" (ch));
51}
52
53
54#elif defined(CONFIG_CPU_XSCALE)
55
56static void icedcc_putc(int ch)
57{
58 int status, i = 0x4000000;
59
60 do {
61 if (--i < 0)
62 return;
63
64 asm volatile ("mrc p14, 0, %0, c14, c0, 0" : "=r" (status));
65 } while (status & (1 << 28));
66
67 asm("mcr p14, 0, %0, c8, c0, 0" : : "r" (ch));
68}
69
70#else
71
72static void icedcc_putc(int ch)
73{
74 int status, i = 0x4000000;
75
76 do {
77 if (--i < 0)
78 return;
79
80 asm volatile ("mrc p14, 0, %0, c0, c0, 0" : "=r" (status));
81 } while (status & 2);
82
83 asm("mcr p14, 0, %0, c1, c0, 0" : : "r" (ch));
84}
85
86#endif
87
88#define putc(ch) icedcc_putc(ch)
89#endif
90
91static void putstr(const char *ptr)
92{
93 char c;
94
95 while ((c = *ptr++) != '\0') {
96 if (c == '\n')
97 putc('\r');
98 putc(c);
99 }
100
101 flush();
102}
103
104
105void *memcpy(void *__dest, __const void *__src, size_t __n)
106{
107 int i = 0;
108 unsigned char *d = (unsigned char *)__dest, *s = (unsigned char *)__src;
109
110 for (i = __n >> 3; i > 0; i--) {
111 *d++ = *s++;
112 *d++ = *s++;
113 *d++ = *s++;
114 *d++ = *s++;
115 *d++ = *s++;
116 *d++ = *s++;
117 *d++ = *s++;
118 *d++ = *s++;
119 }
120
121 if (__n & 1 << 2) {
122 *d++ = *s++;
123 *d++ = *s++;
124 *d++ = *s++;
125 *d++ = *s++;
126 }
127
128 if (__n & 1 << 1) {
129 *d++ = *s++;
130 *d++ = *s++;
131 }
132
133 if (__n & 1)
134 *d++ = *s++;
135
136 return __dest;
137}
138
139/*
140 * gzip declarations
141 */
142extern char input_data[];
143extern char input_data_end[];
144
145unsigned char *output_data;
146
147unsigned long free_mem_ptr;
148unsigned long free_mem_end_ptr;
149
150#ifndef arch_error
151#define arch_error(x)
152#endif
153
154void error(char *x)
155{
156 arch_error(x);
157
158 putstr("\n\n");
159 putstr(x);
160 putstr("\n\n -- System halted");
161
162 while(1); /* Halt */
163}
164
165asmlinkage void __div0(void)
166{
167 error("Attempting division by 0!");
168}
169
170extern int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x));
171
172
173void
174decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p,
175 unsigned long free_mem_ptr_end_p,
176 int arch_id)
177{
178 int ret;
179
180 output_data = (unsigned char *)output_start;
181 free_mem_ptr = free_mem_ptr_p;
182 free_mem_end_ptr = free_mem_ptr_end_p;
183 __machine_arch_type = arch_id;
184
185 arch_decomp_setup();
186
187 putstr("Uncompressing Linux...");
188 ret = do_decompress(input_data, input_data_end - input_data,
189 output_data, error);
190 if (ret)
191 error("decompressor returned an error");
192 else
193 putstr(" done, booting the kernel.\n");
194}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * 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 * Modified for ARM Linux by Russell King
11 *
12 * Nicolas Pitre <nico@visuaide.com> 1999/04/14 :
13 * For this code to run directly from Flash, all constant variables must
14 * be marked with 'const' and all other variables initialized at run-time
15 * only. This way all non constant variables will end up in the bss segment,
16 * which should point to addresses in RAM and cleared to 0 on start.
17 * This allows for a much quicker boot time.
18 */
19
20unsigned int __machine_arch_type;
21
22#include <linux/compiler.h> /* for inline */
23#include <linux/types.h>
24#include <linux/linkage.h>
25#include "misc.h"
26#ifdef CONFIG_ARCH_EP93XX
27#include "misc-ep93xx.h"
28#endif
29
30static void putstr(const char *ptr);
31
32#include CONFIG_UNCOMPRESS_INCLUDE
33
34#ifdef CONFIG_DEBUG_ICEDCC
35
36#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7)
37
38static void icedcc_putc(int ch)
39{
40 int status, i = 0x4000000;
41
42 do {
43 if (--i < 0)
44 return;
45
46 asm volatile ("mrc p14, 0, %0, c0, c1, 0" : "=r" (status));
47 } while (status & (1 << 29));
48
49 asm("mcr p14, 0, %0, c0, c5, 0" : : "r" (ch));
50}
51
52
53#elif defined(CONFIG_CPU_XSCALE)
54
55static void icedcc_putc(int ch)
56{
57 int status, i = 0x4000000;
58
59 do {
60 if (--i < 0)
61 return;
62
63 asm volatile ("mrc p14, 0, %0, c14, c0, 0" : "=r" (status));
64 } while (status & (1 << 28));
65
66 asm("mcr p14, 0, %0, c8, c0, 0" : : "r" (ch));
67}
68
69#else
70
71static void icedcc_putc(int ch)
72{
73 int status, i = 0x4000000;
74
75 do {
76 if (--i < 0)
77 return;
78
79 asm volatile ("mrc p14, 0, %0, c0, c0, 0" : "=r" (status));
80 } while (status & 2);
81
82 asm("mcr p14, 0, %0, c1, c0, 0" : : "r" (ch));
83}
84
85#endif
86
87#define putc(ch) icedcc_putc(ch)
88#endif
89
90static void putstr(const char *ptr)
91{
92 char c;
93
94 while ((c = *ptr++) != '\0') {
95 if (c == '\n')
96 putc('\r');
97 putc(c);
98 }
99
100 flush();
101}
102
103/*
104 * gzip declarations
105 */
106unsigned char *output_data;
107
108unsigned long free_mem_ptr;
109unsigned long free_mem_end_ptr;
110
111#ifndef arch_error
112#define arch_error(x)
113#endif
114
115void error(char *x)
116{
117 arch_error(x);
118
119 putstr("\n\n");
120 putstr(x);
121 putstr("\n\n -- System halted");
122
123 while(1); /* Halt */
124}
125
126asmlinkage void __div0(void)
127{
128 error("Attempting division by 0!");
129}
130
131void
132decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p,
133 unsigned long free_mem_ptr_end_p,
134 int arch_id)
135{
136 int ret;
137
138 output_data = (unsigned char *)output_start;
139 free_mem_ptr = free_mem_ptr_p;
140 free_mem_end_ptr = free_mem_ptr_end_p;
141 __machine_arch_type = arch_id;
142
143#ifdef CONFIG_ARCH_EP93XX
144 ep93xx_decomp_setup();
145#endif
146 arch_decomp_setup();
147
148 putstr("Uncompressing Linux...");
149 ret = do_decompress(input_data, input_data_end - input_data,
150 output_data, error);
151 if (ret)
152 error("decompressor returned an error");
153 else
154 putstr(" done, booting the kernel.\n");
155}
156
157void __fortify_panic(const u8 reason, size_t avail, size_t size)
158{
159 error("detected buffer overflow");
160}