154 lines
2.9 KiB
C
154 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* arch/sh/boot/compressed/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
|
|
*
|
|
* Adapted for SH by Stuart Menefy, Aug 1999
|
|
*
|
|
* Modified to use standard LinuxSH BIOS by Greg Banks 7Jul2000
|
|
*/
|
|
|
|
#include <linux/uaccess.h>
|
|
#include <asm/addrspace.h>
|
|
#include <asm/page.h>
|
|
|
|
/*
|
|
* gzip declarations
|
|
*/
|
|
|
|
#define STATIC static
|
|
|
|
#undef memset
|
|
#undef memcpy
|
|
#define memzero(s, n) memset ((s), 0, (n))
|
|
|
|
/* cache.c */
|
|
#define CACHE_ENABLE 0
|
|
#define CACHE_DISABLE 1
|
|
int cache_control(unsigned int command);
|
|
|
|
extern char input_data[];
|
|
extern int input_len;
|
|
static unsigned char *output;
|
|
|
|
static void error(char *m);
|
|
|
|
int puts(const char *);
|
|
|
|
extern int _text; /* Defined in vmlinux.lds.S */
|
|
extern int _end;
|
|
static unsigned long free_mem_ptr;
|
|
static unsigned long free_mem_end_ptr;
|
|
|
|
#ifdef CONFIG_HAVE_KERNEL_BZIP2
|
|
#define HEAP_SIZE 0x400000
|
|
#else
|
|
#define HEAP_SIZE 0x10000
|
|
#endif
|
|
|
|
#ifdef CONFIG_KERNEL_GZIP
|
|
#include "../../../../lib/decompress_inflate.c"
|
|
#endif
|
|
|
|
#ifdef CONFIG_KERNEL_BZIP2
|
|
#include "../../../../lib/decompress_bunzip2.c"
|
|
#endif
|
|
|
|
#ifdef CONFIG_KERNEL_LZMA
|
|
#include "../../../../lib/decompress_unlzma.c"
|
|
#endif
|
|
|
|
#ifdef CONFIG_KERNEL_XZ
|
|
#include "../../../../lib/decompress_unxz.c"
|
|
#endif
|
|
|
|
#ifdef CONFIG_KERNEL_LZO
|
|
#include "../../../../lib/decompress_unlzo.c"
|
|
#endif
|
|
|
|
int puts(const char *s)
|
|
{
|
|
/* This should be updated to use the sh-sci routines */
|
|
return 0;
|
|
}
|
|
|
|
void* memset(void* s, int c, size_t n)
|
|
{
|
|
int i;
|
|
char *ss = (char*)s;
|
|
|
|
for (i=0;i<n;i++) ss[i] = c;
|
|
return s;
|
|
}
|
|
|
|
void* memcpy(void* __dest, __const void* __src,
|
|
size_t __n)
|
|
{
|
|
int i;
|
|
char *d = (char *)__dest, *s = (char *)__src;
|
|
|
|
for (i=0;i<__n;i++) d[i] = s[i];
|
|
return __dest;
|
|
}
|
|
|
|
static void error(char *x)
|
|
{
|
|
puts("\n\n");
|
|
puts(x);
|
|
puts("\n\n -- System halted");
|
|
|
|
while(1); /* Halt */
|
|
}
|
|
|
|
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");
|
|
}
|
|
|
|
#ifdef CONFIG_SUPERH64
|
|
#define stackalign 8
|
|
#else
|
|
#define stackalign 4
|
|
#endif
|
|
|
|
#define STACK_SIZE (4096)
|
|
long __attribute__ ((aligned(stackalign))) user_stack[STACK_SIZE];
|
|
long *stack_start = &user_stack[STACK_SIZE];
|
|
|
|
void decompress_kernel(void)
|
|
{
|
|
unsigned long output_addr;
|
|
|
|
__stack_chk_guard_setup();
|
|
|
|
#ifdef CONFIG_SUPERH64
|
|
output_addr = (CONFIG_MEMORY_START + 0x2000);
|
|
#else
|
|
output_addr = __pa((unsigned long)&_text+PAGE_SIZE);
|
|
#if defined(CONFIG_29BIT)
|
|
output_addr |= P2SEG;
|
|
#endif
|
|
#endif
|
|
|
|
output = (unsigned char *)output_addr;
|
|
free_mem_ptr = (unsigned long)&_end;
|
|
free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
|
|
|
|
puts("Uncompressing Linux... ");
|
|
cache_control(CACHE_ENABLE);
|
|
__decompress(input_data, input_len, NULL, NULL, output, 0, NULL, error);
|
|
cache_control(CACHE_DISABLE);
|
|
puts("Ok, booting the kernel.\n");
|
|
}
|