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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}
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 */
106extern char input_data[];
107extern char input_data_end[];
108
109unsigned char *output_data;
110
111unsigned long free_mem_ptr;
112unsigned long free_mem_end_ptr;
113
114#ifndef arch_error
115#define arch_error(x)
116#endif
117
118void error(char *x)
119{
120 arch_error(x);
121
122 putstr("\n\n");
123 putstr(x);
124 putstr("\n\n -- System halted");
125
126 while(1); /* Halt */
127}
128
129asmlinkage void __div0(void)
130{
131 error("Attempting division by 0!");
132}
133
134extern int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x));
135
136
137void
138decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p,
139 unsigned long free_mem_ptr_end_p,
140 int arch_id)
141{
142 int ret;
143
144 output_data = (unsigned char *)output_start;
145 free_mem_ptr = free_mem_ptr_p;
146 free_mem_end_ptr = free_mem_ptr_end_p;
147 __machine_arch_type = arch_id;
148
149#ifdef CONFIG_ARCH_EP93XX
150 ep93xx_decomp_setup();
151#endif
152 arch_decomp_setup();
153
154 putstr("Uncompressing Linux...");
155 ret = do_decompress(input_data, input_data_end - input_data,
156 output_data, error);
157 if (ret)
158 error("decompressor returned an error");
159 else
160 putstr(" done, booting the kernel.\n");
161}
162
163void fortify_panic(const char *name)
164{
165 error("detected buffer overflow");
166}