| 1 | |
| 2 | |
| 3 | * misc.c
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| 4 | *
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| 5 | * This is a collection of several routines from gzip-1.0.3
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| 6 | * adapted for Linux.
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| 7 | *
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| 8 | * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
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| 9 | *
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| 10 | * Modified for ARM Linux by Russell King
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| 11 | *
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| 12 | * Nicolas Pitre <[email protected]> 1999/04/14 :
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| 13 | * For this code to run directly from Flash, all constant variables must
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| 14 | * be marked with 'const' and all other variables initialized at run-time
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| 15 | * only. This way all non constant variables will end up in the bss segment,
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| 16 | * which should point to addresses in RAM and cleared to 0 on start.
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| 17 | * This allows for a much quicker boot time.
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| 18 |
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| 19 |
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| 20 | unsigned int __machine_arch_type;
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| 21 |
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| 22 | #include <linux/compiler.h>
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| 23 | #include <linux/types.h>
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| 24 | #include <linux/linkage.h>
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| 25 | #include "misc.h"
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| 26 | #ifdef CONFIG_ARCH_EP93XX
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| 27 | #include "misc-ep93xx.h"
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| 28 | #endif
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| 29 |
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| 30 | static void putstr(const char *ptr);
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| 31 |
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| 32 | #include CONFIG_UNCOMPRESS_INCLUDE
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| 33 |
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| 34 | #ifdef CONFIG_DEBUG_ICEDCC
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| 35 |
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| 36 | #if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7)
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| 37 |
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| 38 | static void icedcc_putc(int ch)
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| 39 | {
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| 40 | int status, i = 0x4000000;
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| 41 |
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| 42 | do {
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| 43 | if (--i < 0)
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| 44 | return;
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| 45 |
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| 46 | asm volatile ("mrc p14, 0, %0, c0, c1, 0" : "=r" (status));
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| 47 | } while (status & (1 << 29));
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| 48 |
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| 49 | asm("mcr p14, 0, %0, c0, c5, 0" : : "r" (ch));
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| 50 | }
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| 51 |
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| 52 |
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| 53 | #elif defined(CONFIG_CPU_XSCALE)
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| 54 |
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| 55 | static void icedcc_putc(int ch)
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| 56 | {
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| 57 | int status, i = 0x4000000;
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| 58 |
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| 59 | do {
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| 60 | if (--i < 0)
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| 61 | return;
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| 62 |
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| 63 | asm volatile ("mrc p14, 0, %0, c14, c0, 0" : "=r" (status));
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| 64 | } while (status & (1 << 28));
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| 65 |
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| 66 | asm("mcr p14, 0, %0, c8, c0, 0" : : "r" (ch));
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| 67 | }
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| 68 |
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| 69 | #else
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| 70 |
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| 71 | static void icedcc_putc(int ch)
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| 72 | {
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| 73 | int status, i = 0x4000000;
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| 74 |
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| 75 | do {
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| 76 | if (--i < 0)
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| 77 | return;
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| 78 |
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| 79 | asm volatile ("mrc p14, 0, %0, c0, c0, 0" : "=r" (status));
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| 80 | } while (status & 2);
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| 81 |
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| 82 | asm("mcr p14, 0, %0, c1, c0, 0" : : "r" (ch));
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| 83 | }
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| 84 |
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| 85 | #endif
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| 86 |
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| 87 | #define putc(ch) icedcc_putc(ch)
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| 88 | #endif
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| 89 |
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| 90 | static void putstr(const char *ptr)
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| 91 | {
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| 92 | char c;
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| 93 |
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| 94 | while ((c = *ptr++) != '\0') {
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| 95 | if (c == '\n')
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| 96 | putc('\r');
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| 97 | putc(c);
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| 98 | }
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| 99 |
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| 100 | flush();
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| 101 | }
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| 102 |
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| 103 | |
| 104 | * gzip declarations
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| 105 |
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| 106 | unsigned char *output_data;
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| 107 |
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| 108 | unsigned long free_mem_ptr;
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| 109 | unsigned long free_mem_end_ptr;
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| 110 |
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| 111 | #ifndef arch_error
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| 112 | #define arch_error(x)
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| 113 | #endif
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| 114 |
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| 115 | void error(char *x)
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| 116 | {
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| 117 | arch_error(x);
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| 118 |
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| 119 | putstr("\n\n");
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| 120 | putstr(x);
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| 121 | putstr("\n\n -- System halted");
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| 122 |
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| 123 | while(1);
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| 124 | }
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| 125 |
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| 126 | asmlinkage void __div0(void)
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| 127 | {
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| 128 | error("Attempting division by 0!");
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| 129 | }
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| 130 |
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| 131 | void
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| 132 | decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p,
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| 133 | unsigned long free_mem_ptr_end_p,
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| 134 | int arch_id)
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| 135 | {
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| 136 | int ret;
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| 137 |
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| 138 | output_data = (unsigned char *)output_start;
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| 139 | free_mem_ptr = free_mem_ptr_p;
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| 140 | free_mem_end_ptr = free_mem_ptr_end_p;
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| 141 | __machine_arch_type = arch_id;
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| 142 |
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| 143 | #ifdef CONFIG_ARCH_EP93XX
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| 144 | ep93xx_decomp_setup();
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| 145 | #endif
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| 146 | arch_decomp_setup();
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| 147 |
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| 148 | putstr("Uncompressing Linux...");
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| 149 | ret = do_decompress(input_data, input_data_end - input_data,
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| 150 | output_data, error);
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| 151 | if (ret)
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| 152 | error("decompressor returned an error");
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| 153 | else
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| 154 | putstr(" done, booting the kernel.\n");
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| 155 | }
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| 156 |
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| 157 | void __fortify_panic(const u8 reason, size_t avail, size_t size)
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| 158 | {
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| 159 | error("detected buffer overflow");
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| 160 | }
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