169 lines
3.1 KiB
C
169 lines
3.1 KiB
C
/*
|
|
* misc.c
|
|
*
|
|
* This is a collection of several routines from gzip-1.0.3
|
|
* adapted for Linux.
|
|
*
|
|
* malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
|
|
*
|
|
* Modified for ARM Linux by Russell King
|
|
*
|
|
* Nicolas Pitre <nico@visuaide.com> 1999/04/14 :
|
|
* For this code to run directly from Flash, all constant variables must
|
|
* be marked with 'const' and all other variables initialized at run-time
|
|
* only. This way all non constant variables will end up in the bss segment,
|
|
* which should point to addresses in RAM and cleared to 0 on start.
|
|
* This allows for a much quicker boot time.
|
|
*/
|
|
|
|
unsigned int __machine_arch_type;
|
|
|
|
#include <linux/compiler.h> /* for inline */
|
|
#include <linux/types.h>
|
|
#include <linux/linkage.h>
|
|
|
|
static void putstr(const char *ptr);
|
|
extern void error(char *x);
|
|
|
|
#include CONFIG_UNCOMPRESS_INCLUDE
|
|
|
|
#ifdef CONFIG_DEBUG_ICEDCC
|
|
|
|
#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7)
|
|
|
|
static void icedcc_putc(int ch)
|
|
{
|
|
int status, i = 0x4000000;
|
|
|
|
do {
|
|
if (--i < 0)
|
|
return;
|
|
|
|
asm volatile ("mrc p14, 0, %0, c0, c1, 0" : "=r" (status));
|
|
} while (status & (1 << 29));
|
|
|
|
asm("mcr p14, 0, %0, c0, c5, 0" : : "r" (ch));
|
|
}
|
|
|
|
|
|
#elif defined(CONFIG_CPU_XSCALE)
|
|
|
|
static void icedcc_putc(int ch)
|
|
{
|
|
int status, i = 0x4000000;
|
|
|
|
do {
|
|
if (--i < 0)
|
|
return;
|
|
|
|
asm volatile ("mrc p14, 0, %0, c14, c0, 0" : "=r" (status));
|
|
} while (status & (1 << 28));
|
|
|
|
asm("mcr p14, 0, %0, c8, c0, 0" : : "r" (ch));
|
|
}
|
|
|
|
#else
|
|
|
|
static void icedcc_putc(int ch)
|
|
{
|
|
int status, i = 0x4000000;
|
|
|
|
do {
|
|
if (--i < 0)
|
|
return;
|
|
|
|
asm volatile ("mrc p14, 0, %0, c0, c0, 0" : "=r" (status));
|
|
} while (status & 2);
|
|
|
|
asm("mcr p14, 0, %0, c1, c0, 0" : : "r" (ch));
|
|
}
|
|
|
|
#endif
|
|
|
|
#define putc(ch) icedcc_putc(ch)
|
|
#endif
|
|
|
|
static void putstr(const char *ptr)
|
|
{
|
|
char c;
|
|
|
|
while ((c = *ptr++) != '\0') {
|
|
if (c == '\n')
|
|
putc('\r');
|
|
putc(c);
|
|
}
|
|
|
|
flush();
|
|
}
|
|
|
|
/*
|
|
* gzip declarations
|
|
*/
|
|
extern char input_data[];
|
|
extern char input_data_end[];
|
|
|
|
unsigned char *output_data;
|
|
|
|
unsigned long free_mem_ptr;
|
|
unsigned long free_mem_end_ptr;
|
|
|
|
#ifndef arch_error
|
|
#define arch_error(x)
|
|
#endif
|
|
|
|
void error(char *x)
|
|
{
|
|
arch_error(x);
|
|
|
|
putstr("\n\n");
|
|
putstr(x);
|
|
putstr("\n\n -- System halted");
|
|
|
|
while(1); /* Halt */
|
|
}
|
|
|
|
asmlinkage void __div0(void)
|
|
{
|
|
error("Attempting division by 0!");
|
|
}
|
|
|
|
unsigned long __stack_chk_guard;
|
|
|
|
void __stack_chk_guard_setup(void)
|
|
{
|
|
__stack_chk_guard = 0x000a0dff;
|
|
}
|
|
|
|
void __stack_chk_fail(void)
|
|
{
|
|
error("stack-protector: Kernel stack is corrupted\n");
|
|
}
|
|
|
|
extern int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x));
|
|
|
|
|
|
void
|
|
decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p,
|
|
unsigned long free_mem_ptr_end_p,
|
|
int arch_id)
|
|
{
|
|
int ret;
|
|
|
|
__stack_chk_guard_setup();
|
|
|
|
output_data = (unsigned char *)output_start;
|
|
free_mem_ptr = free_mem_ptr_p;
|
|
free_mem_end_ptr = free_mem_ptr_end_p;
|
|
__machine_arch_type = arch_id;
|
|
|
|
arch_decomp_setup();
|
|
|
|
putstr("Uncompressing Linux...");
|
|
ret = do_decompress(input_data, input_data_end - input_data,
|
|
output_data, error);
|
|
if (ret)
|
|
error("decompressor returned an error");
|
|
else
|
|
putstr(" done, booting the kernel.\n");
|
|
}
|