274 lines
5.9 KiB
C
274 lines
5.9 KiB
C
/*
|
|
* misc.c
|
|
*
|
|
* $Id: misc.c,v 1.6 2003/10/27 08:04:31 starvik Exp $
|
|
*
|
|
* This is a collection of several routines from gzip-1.0.3
|
|
* adapted for Linux.
|
|
*
|
|
* malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
|
|
* puts by Nick Holloway 1993, better puts by Martin Mares 1995
|
|
* adoptation for Linux/CRIS Axis Communications AB, 1999
|
|
*
|
|
*/
|
|
|
|
/* where the piggybacked kernel image expects itself to live.
|
|
* it is the same address we use when we network load an uncompressed
|
|
* image into DRAM, and it is the address the kernel is linked to live
|
|
* at by vmlinux.lds.S
|
|
*/
|
|
|
|
#define KERNEL_LOAD_ADR 0x40004000
|
|
|
|
#include <linux/config.h>
|
|
|
|
#include <linux/types.h>
|
|
#include <asm/arch/svinto.h>
|
|
|
|
/*
|
|
* gzip declarations
|
|
*/
|
|
|
|
#define OF(args) args
|
|
#define STATIC static
|
|
|
|
void* memset(void* s, int c, size_t n);
|
|
void* memcpy(void* __dest, __const void* __src,
|
|
size_t __n);
|
|
|
|
#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 */
|
|
|
|
unsigned inptr = 0; /* index of next byte to be processed in inbuf
|
|
* After decompression it will contain the
|
|
* compressed size, and head.S will read it.
|
|
*/
|
|
|
|
static unsigned outcnt = 0; /* 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() inbuf[inptr++]
|
|
|
|
/* Diagnostic functions */
|
|
#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);
|
|
static void gzip_mark(void **);
|
|
static void gzip_release(void **);
|
|
|
|
extern char *input_data; /* lives in head.S */
|
|
|
|
static long bytes_out = 0;
|
|
static uch *output_data;
|
|
static unsigned long output_ptr = 0;
|
|
|
|
static void *malloc(int size);
|
|
static void free(void *where);
|
|
static void error(char *m);
|
|
static void gzip_mark(void **);
|
|
static void gzip_release(void **);
|
|
|
|
static void puts(const char *);
|
|
|
|
/* the "heap" is put directly after the BSS ends, at end */
|
|
|
|
extern int end;
|
|
static long free_mem_ptr = (long)&end;
|
|
|
|
#include "../../../../../lib/inflate.c"
|
|
|
|
static void *malloc(int size)
|
|
{
|
|
void *p;
|
|
|
|
if (size <0) error("Malloc error");
|
|
|
|
free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */
|
|
|
|
p = (void *)free_mem_ptr;
|
|
free_mem_ptr += size;
|
|
|
|
return p;
|
|
}
|
|
|
|
static void free(void *where)
|
|
{ /* Don't care */
|
|
}
|
|
|
|
static void gzip_mark(void **ptr)
|
|
{
|
|
*ptr = (void *) free_mem_ptr;
|
|
}
|
|
|
|
static void gzip_release(void **ptr)
|
|
{
|
|
free_mem_ptr = (long) *ptr;
|
|
}
|
|
|
|
/* decompressor info and error messages to serial console */
|
|
|
|
static void
|
|
puts(const char *s)
|
|
{
|
|
#ifndef CONFIG_ETRAX_DEBUG_PORT_NULL
|
|
while(*s) {
|
|
#ifdef CONFIG_ETRAX_DEBUG_PORT0
|
|
while(!(*R_SERIAL0_STATUS & (1 << 5))) ;
|
|
*R_SERIAL0_TR_DATA = *s++;
|
|
#endif
|
|
#ifdef CONFIG_ETRAX_DEBUG_PORT1
|
|
while(!(*R_SERIAL1_STATUS & (1 << 5))) ;
|
|
*R_SERIAL1_TR_DATA = *s++;
|
|
#endif
|
|
#ifdef CONFIG_ETRAX_DEBUG_PORT2
|
|
while(!(*R_SERIAL2_STATUS & (1 << 5))) ;
|
|
*R_SERIAL2_TR_DATA = *s++;
|
|
#endif
|
|
#ifdef CONFIG_ETRAX_DEBUG_PORT3
|
|
while(!(*R_SERIAL3_STATUS & (1 << 5))) ;
|
|
*R_SERIAL3_TR_DATA = *s++;
|
|
#endif
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void*
|
|
memset(void* s, int c, size_t n)
|
|
{
|
|
int i;
|
|
char *ss = (char*)s;
|
|
|
|
for (i=0;i<n;i++) ss[i] = c;
|
|
}
|
|
|
|
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];
|
|
}
|
|
|
|
/* ===========================================================================
|
|
* Write the output window window[0..outcnt-1] and update crc and bytes_out.
|
|
* (Used for the decompressed data only.)
|
|
*/
|
|
|
|
static void
|
|
flush_window()
|
|
{
|
|
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("\n\n");
|
|
puts(x);
|
|
puts("\n\n -- System halted\n");
|
|
|
|
while(1); /* Halt */
|
|
}
|
|
|
|
void
|
|
setup_normal_output_buffer()
|
|
{
|
|
output_data = (char *)KERNEL_LOAD_ADR;
|
|
}
|
|
|
|
void
|
|
decompress_kernel()
|
|
{
|
|
char revision;
|
|
|
|
/* input_data is set in head.S */
|
|
inbuf = input_data;
|
|
|
|
#ifdef CONFIG_ETRAX_DEBUG_PORT0
|
|
*R_SERIAL0_XOFF = 0;
|
|
*R_SERIAL0_BAUD = 0x99;
|
|
*R_SERIAL0_TR_CTRL = 0x40;
|
|
#endif
|
|
#ifdef CONFIG_ETRAX_DEBUG_PORT1
|
|
*R_SERIAL1_XOFF = 0;
|
|
*R_SERIAL1_BAUD = 0x99;
|
|
*R_SERIAL1_TR_CTRL = 0x40;
|
|
#endif
|
|
#ifdef CONFIG_ETRAX_DEBUG_PORT2
|
|
*R_GEN_CONFIG = 0x08;
|
|
*R_SERIAL2_XOFF = 0;
|
|
*R_SERIAL2_BAUD = 0x99;
|
|
*R_SERIAL2_TR_CTRL = 0x40;
|
|
#endif
|
|
#ifdef CONFIG_ETRAX_DEBUG_PORT3
|
|
*R_GEN_CONFIG = 0x100;
|
|
*R_SERIAL3_XOFF = 0;
|
|
*R_SERIAL3_BAUD = 0x99;
|
|
*R_SERIAL3_TR_CTRL = 0x40;
|
|
#endif
|
|
|
|
setup_normal_output_buffer();
|
|
|
|
makecrc();
|
|
|
|
__asm__ volatile ("move vr,%0" : "=rm" (revision));
|
|
if (revision < 10)
|
|
{
|
|
puts("You need an ETRAX 100LX to run linux 2.6\n");
|
|
while(1);
|
|
}
|
|
|
|
puts("Uncompressing Linux...\n");
|
|
gunzip();
|
|
puts("Done. Now booting the kernel.\n");
|
|
}
|