Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 19 | unsigned int __machine_arch_type; |
| 20 | |
Rusty Russell | aa0d3bb | 2009-03-31 13:05:35 -0600 | [diff] [blame] | 21 | #include <linux/compiler.h> /* for inline */ |
Nicolas Pitre | df4879f | 2011-09-13 21:42:55 -0400 | [diff] [blame] | 22 | #include <linux/types.h> |
Albin Tonnerre | e7db7b4 | 2010-01-08 14:42:43 -0800 | [diff] [blame] | 23 | #include <linux/linkage.h> |
Russell King | a081568 | 2006-03-28 10:24:33 +0100 | [diff] [blame] | 24 | |
| 25 | static void putstr(const char *ptr); |
Mark Brown | a2302b4 | 2010-03-10 19:10:28 +0100 | [diff] [blame] | 26 | extern void error(char *x); |
Russell King | a081568 | 2006-03-28 10:24:33 +0100 | [diff] [blame] | 27 | |
Shawn Guo | 615967b | 2013-03-14 08:47:27 +0100 | [diff] [blame] | 28 | #include CONFIG_UNCOMPRESS_INCLUDE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
| 30 | #ifdef CONFIG_DEBUG_ICEDCC |
Tony Lindgren | 7d95ded | 2006-09-20 13:03:34 +0100 | [diff] [blame] | 31 | |
Stephen Boyd | dfad549 | 2011-03-23 22:46:15 +0100 | [diff] [blame] | 32 | #if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7) |
Tony Lindgren | 7d95ded | 2006-09-20 13:03:34 +0100 | [diff] [blame] | 33 | |
| 34 | static 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 | } |
Tony Lindgren | 200b7a8 | 2010-01-19 16:40:07 +0100 | [diff] [blame] | 47 | |
Tony Lindgren | 200b7a8 | 2010-01-19 16:40:07 +0100 | [diff] [blame] | 48 | |
Jean-Christop PLAGNIOL-VILLARD | c633c3c | 2009-02-25 04:20:40 +0100 | [diff] [blame] | 49 | #elif defined(CONFIG_CPU_XSCALE) |
| 50 | |
| 51 | static 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 | } |
Tony Lindgren | 7d95ded | 2006-09-20 13:03:34 +0100 | [diff] [blame] | 64 | |
| 65 | #else |
| 66 | |
Russell King | de4533a | 2006-03-28 10:34:05 +0100 | [diff] [blame] | 67 | static void icedcc_putc(int ch) |
| 68 | { |
| 69 | int status, i = 0x4000000; |
| 70 | |
| 71 | do { |
| 72 | if (--i < 0) |
| 73 | return; |
| 74 | |
Uwe Zeisberger | b2556da | 2006-05-02 20:40:56 +0100 | [diff] [blame] | 75 | asm volatile ("mrc p14, 0, %0, c0, c0, 0" : "=r" (status)); |
Russell King | de4533a | 2006-03-28 10:34:05 +0100 | [diff] [blame] | 76 | } while (status & 2); |
| 77 | |
Uwe Zeisberger | b2556da | 2006-05-02 20:40:56 +0100 | [diff] [blame] | 78 | asm("mcr p14, 0, %0, c1, c0, 0" : : "r" (ch)); |
Russell King | de4533a | 2006-03-28 10:34:05 +0100 | [diff] [blame] | 79 | } |
| 80 | |
Tony Lindgren | 7d95ded | 2006-09-20 13:03:34 +0100 | [diff] [blame] | 81 | #endif |
| 82 | |
Russell King | a081568 | 2006-03-28 10:24:33 +0100 | [diff] [blame] | 83 | #define putc(ch) icedcc_putc(ch) |
Russell King | a081568 | 2006-03-28 10:24:33 +0100 | [diff] [blame] | 84 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | |
Russell King | a081568 | 2006-03-28 10:24:33 +0100 | [diff] [blame] | 86 | static void putstr(const char *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | { |
Russell King | a081568 | 2006-03-28 10:24:33 +0100 | [diff] [blame] | 88 | char c; |
| 89 | |
| 90 | while ((c = *ptr++) != '\0') { |
| 91 | if (c == '\n') |
| 92 | putc('\r'); |
| 93 | putc(c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | } |
Russell King | a081568 | 2006-03-28 10:24:33 +0100 | [diff] [blame] | 95 | |
| 96 | flush(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | } |
| 98 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | /* |
Nicolas Pitre | e40f1e9 | 2011-04-19 16:13:23 -0400 | [diff] [blame] | 100 | * gzip declarations |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | extern char input_data[]; |
| 103 | extern char input_data_end[]; |
| 104 | |
Russell King | 5de813b | 2010-02-25 12:14:40 +0000 | [diff] [blame] | 105 | unsigned char *output_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
Russell King | 5de813b | 2010-02-25 12:14:40 +0000 | [diff] [blame] | 107 | unsigned long free_mem_ptr; |
| 108 | unsigned long free_mem_end_ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | |
Ben Dooks | f8c905d | 2005-11-08 22:43:05 +0000 | [diff] [blame] | 110 | #ifndef arch_error |
| 111 | #define arch_error(x) |
| 112 | #endif |
| 113 | |
Russell King | 5de813b | 2010-02-25 12:14:40 +0000 | [diff] [blame] | 114 | void error(char *x) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | { |
Ben Dooks | f8c905d | 2005-11-08 22:43:05 +0000 | [diff] [blame] | 116 | arch_error(x); |
| 117 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | putstr("\n\n"); |
| 119 | putstr(x); |
| 120 | putstr("\n\n -- System halted"); |
| 121 | |
| 122 | while(1); /* Halt */ |
| 123 | } |
| 124 | |
Albin Tonnerre | e7db7b4 | 2010-01-08 14:42:43 -0800 | [diff] [blame] | 125 | asmlinkage void __div0(void) |
| 126 | { |
| 127 | error("Attempting division by 0!"); |
| 128 | } |
| 129 | |
Kees Cook | 8779657 | 2013-12-19 11:35:59 -0800 | [diff] [blame] | 130 | unsigned long __stack_chk_guard; |
| 131 | |
| 132 | void __stack_chk_guard_setup(void) |
| 133 | { |
| 134 | __stack_chk_guard = 0x000a0dff; |
| 135 | } |
| 136 | |
| 137 | void __stack_chk_fail(void) |
| 138 | { |
| 139 | error("stack-protector: Kernel stack is corrupted\n"); |
| 140 | } |
| 141 | |
Nicolas Pitre | ccc1c7c | 2011-04-21 21:59:49 -0400 | [diff] [blame] | 142 | extern int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x)); |
Russell King | 5de813b | 2010-02-25 12:14:40 +0000 | [diff] [blame] | 143 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | |
Nicolas Pitre | e40f1e9 | 2011-04-19 16:13:23 -0400 | [diff] [blame] | 145 | void |
Albin Tonnerre | e7db7b4 | 2010-01-08 14:42:43 -0800 | [diff] [blame] | 146 | decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p, |
| 147 | unsigned long free_mem_ptr_end_p, |
| 148 | int arch_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | { |
Nicolas Pitre | ccc1c7c | 2011-04-21 21:59:49 -0400 | [diff] [blame] | 150 | int ret; |
Albin Tonnerre | e7db7b4 | 2010-01-08 14:42:43 -0800 | [diff] [blame] | 151 | |
Kees Cook | 8779657 | 2013-12-19 11:35:59 -0800 | [diff] [blame] | 152 | __stack_chk_guard_setup(); |
| 153 | |
Albin Tonnerre | e7db7b4 | 2010-01-08 14:42:43 -0800 | [diff] [blame] | 154 | output_data = (unsigned char *)output_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | free_mem_ptr = free_mem_ptr_p; |
Thomas Petazzoni | 2d6ffcc | 2008-07-25 01:45:44 -0700 | [diff] [blame] | 156 | free_mem_end_ptr = free_mem_ptr_end_p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | __machine_arch_type = arch_id; |
| 158 | |
| 159 | arch_decomp_setup(); |
| 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | putstr("Uncompressing Linux..."); |
Nicolas Pitre | ccc1c7c | 2011-04-21 21:59:49 -0400 | [diff] [blame] | 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"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | } |