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166 lines
3.1 KiB
166 lines
3.1 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* misc.c |
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* |
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* This is a collection of several routines from gzip-1.0.3 |
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* adapted for Linux. |
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* |
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* malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994 |
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* |
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* Modified for ARM Linux by Russell King |
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* |
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* Nicolas Pitre <[email protected]> 1999/04/14 : |
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* For this code to run directly from Flash, all constant variables must |
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* be marked with 'const' and all other variables initialized at run-time |
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* only. This way all non constant variables will end up in the bss segment, |
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* which should point to addresses in RAM and cleared to 0 on start. |
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* This allows for a much quicker boot time. |
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*/ |
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unsigned int __machine_arch_type; |
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#include <linux/compiler.h> /* for inline */ |
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#include <linux/types.h> |
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#include <linux/linkage.h> |
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#include "misc.h" |
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#ifdef CONFIG_ARCH_EP93XX |
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#include "misc-ep93xx.h" |
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#endif |
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static void putstr(const char *ptr); |
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#include CONFIG_UNCOMPRESS_INCLUDE |
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#ifdef CONFIG_DEBUG_ICEDCC |
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#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7) |
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static void icedcc_putc(int ch) |
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{ |
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int status, i = 0x4000000; |
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do { |
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if (--i < 0) |
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return; |
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asm volatile ("mrc p14, 0, %0, c0, c1, 0" : "=r" (status)); |
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} while (status & (1 << 29)); |
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asm("mcr p14, 0, %0, c0, c5, 0" : : "r" (ch)); |
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} |
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#elif defined(CONFIG_CPU_XSCALE) |
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static void icedcc_putc(int ch) |
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{ |
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int status, i = 0x4000000; |
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do { |
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if (--i < 0) |
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return; |
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asm volatile ("mrc p14, 0, %0, c14, c0, 0" : "=r" (status)); |
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} while (status & (1 << 28)); |
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asm("mcr p14, 0, %0, c8, c0, 0" : : "r" (ch)); |
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} |
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#else |
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static void icedcc_putc(int ch) |
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{ |
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int status, i = 0x4000000; |
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do { |
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if (--i < 0) |
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return; |
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asm volatile ("mrc p14, 0, %0, c0, c0, 0" : "=r" (status)); |
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} while (status & 2); |
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asm("mcr p14, 0, %0, c1, c0, 0" : : "r" (ch)); |
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} |
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#endif |
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#define putc(ch) icedcc_putc(ch) |
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#endif |
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static void putstr(const char *ptr) |
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{ |
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char c; |
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while ((c = *ptr++) != '\0') { |
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if (c == '\n') |
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putc('\r'); |
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putc(c); |
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} |
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flush(); |
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} |
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/* |
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* gzip declarations |
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*/ |
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extern char input_data[]; |
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extern char input_data_end[]; |
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unsigned char *output_data; |
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unsigned long free_mem_ptr; |
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unsigned long free_mem_end_ptr; |
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#ifndef arch_error |
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#define arch_error(x) |
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#endif |
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void error(char *x) |
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{ |
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arch_error(x); |
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putstr("\n\n"); |
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putstr(x); |
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putstr("\n\n -- System halted"); |
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while(1); /* Halt */ |
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} |
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asmlinkage void __div0(void) |
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{ |
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error("Attempting division by 0!"); |
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} |
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extern int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x)); |
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void |
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decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p, |
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unsigned long free_mem_ptr_end_p, |
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int arch_id) |
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{ |
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int ret; |
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output_data = (unsigned char *)output_start; |
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free_mem_ptr = free_mem_ptr_p; |
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free_mem_end_ptr = free_mem_ptr_end_p; |
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__machine_arch_type = arch_id; |
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#ifdef CONFIG_ARCH_EP93XX |
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ep93xx_decomp_setup(); |
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#endif |
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arch_decomp_setup(); |
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putstr("Uncompressing Linux..."); |
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ret = do_decompress(input_data, input_data_end - input_data, |
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output_data, error); |
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if (ret) |
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error("decompressor returned an error"); |
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else |
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putstr(" done, booting the kernel.\n"); |
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} |
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void fortify_panic(const char *name) |
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{ |
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error("detected buffer overflow"); |
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}
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