188 lines
4.5 KiB
C
188 lines
4.5 KiB
C
/*
|
|
* Copyright (C) 2009 Thomas Chou <thomas@wytron.com.tw>
|
|
*
|
|
* 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
|
|
*
|
|
* Based on arch/sh/boot/compressed/misc.c
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#include <linux/string.h>
|
|
|
|
/*
|
|
* gzip declarations
|
|
*/
|
|
#define OF(args) args
|
|
#define STATIC static
|
|
|
|
#undef memset
|
|
#undef memcpy
|
|
#define memzero(s, n) memset((s), 0, (n))
|
|
|
|
typedef unsigned char uch;
|
|
typedef unsigned short ush;
|
|
typedef unsigned long ulg;
|
|
#define WSIZE 0x8000 /* Window size must be at least 32k, */
|
|
/* and a power of two */
|
|
|
|
static uch *inbuf; /* input buffer */
|
|
static uch window[WSIZE]; /* Sliding window buffer */
|
|
|
|
static unsigned insize; /* valid bytes in inbuf */
|
|
static unsigned inptr; /* index of next byte to be processed in inbuf */
|
|
static unsigned outcnt; /* bytes in output buffer */
|
|
|
|
/* gzip flag byte */
|
|
#define ASCII_FLAG 0x01 /* bit 0 set: file probably ASCII text */
|
|
#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip
|
|
file */
|
|
#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
|
|
#define ORIG_NAME 0x08 /* bit 3 set: original file name present */
|
|
#define COMMENT 0x10 /* bit 4 set: file comment present */
|
|
#define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
|
|
#define RESERVED 0xC0 /* bit 6,7: reserved */
|
|
|
|
#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf())
|
|
|
|
#ifdef DEBUG
|
|
# define Assert(cond, msg) {if (!(cond)) error(msg); }
|
|
# define Trace(x) fprintf x
|
|
# define Tracev(x) {if (verbose) fprintf x ; }
|
|
# define Tracevv(x) {if (verbose > 1) fprintf x ; }
|
|
# define Tracec(c, x) {if (verbose && (c)) fprintf x ; }
|
|
# define Tracecv(c, x) {if (verbose > 1 && (c)) fprintf x ; }
|
|
#else
|
|
# define Assert(cond, msg)
|
|
# define Trace(x)
|
|
# define Tracev(x)
|
|
# define Tracevv(x)
|
|
# define Tracec(c, x)
|
|
# define Tracecv(c, x)
|
|
#endif
|
|
static int fill_inbuf(void);
|
|
static void flush_window(void);
|
|
static void error(char *m);
|
|
|
|
extern char input_data[];
|
|
extern int input_len;
|
|
|
|
static long bytes_out;
|
|
static uch *output_data;
|
|
static unsigned long output_ptr;
|
|
|
|
#include "console.c"
|
|
|
|
static void error(char *m);
|
|
|
|
int puts(const char *);
|
|
|
|
extern int _end;
|
|
static unsigned long free_mem_ptr;
|
|
static unsigned long free_mem_end_ptr;
|
|
|
|
#define HEAP_SIZE 0x10000
|
|
|
|
#include "../../../../lib/inflate.c"
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Fill the input buffer. This is called only when the buffer is empty
|
|
* and at least one byte is really needed.
|
|
*/
|
|
static int fill_inbuf(void)
|
|
{
|
|
if (insize != 0)
|
|
error("ran out of input data");
|
|
|
|
inbuf = input_data;
|
|
insize = input_len;
|
|
inptr = 1;
|
|
return inbuf[0];
|
|
}
|
|
|
|
/*
|
|
* Write the output window window[0..outcnt-1] and update crc and bytes_out.
|
|
* (Used for the decompressed data only.)
|
|
*/
|
|
static void flush_window(void)
|
|
{
|
|
ulg c = crc; /* temporary variable */
|
|
unsigned n;
|
|
uch *in, *out, ch;
|
|
|
|
in = window;
|
|
out = &output_data[output_ptr];
|
|
for (n = 0; n < outcnt; n++) {
|
|
ch = *out++ = *in++;
|
|
c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
|
|
}
|
|
crc = c;
|
|
bytes_out += (ulg)outcnt;
|
|
output_ptr += (ulg)outcnt;
|
|
outcnt = 0;
|
|
}
|
|
|
|
static void error(char *x)
|
|
{
|
|
puts("\nERROR\n");
|
|
puts(x);
|
|
puts("\n\n -- System halted");
|
|
|
|
while (1) /* Halt */
|
|
;
|
|
}
|
|
|
|
void decompress_kernel(void)
|
|
{
|
|
output_data = (void *) (CONFIG_NIOS2_MEM_BASE |
|
|
CONFIG_NIOS2_KERNEL_REGION_BASE);
|
|
output_ptr = 0;
|
|
free_mem_ptr = (unsigned long)&_end;
|
|
free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
|
|
|
|
console_init();
|
|
makecrc();
|
|
puts("Uncompressing Linux... ");
|
|
gunzip();
|
|
puts("Ok, booting the kernel.\n");
|
|
}
|