/* * misc.c * * $Id: misc.c,v 1.6 2001/04/09 10:00:21 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 adress we use when we network load an uncompressed * image into DRAM, and it is the address the kernel is linked to live * at by etrax100.ld. */#define KERNEL_LOAD_ADR 0x40004000#include <linux/config.h>#include <linux/types.h>#include <asm/svinto.h>/* * gzip declarations */#define OF(args)  args#define STATIC staticvoid* 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)#endifstatic 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\n");	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 voidputs(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 voidflush_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 voiderror(char *x){	puts("\n\n");	puts(x);	puts("\n\n -- System halted\n");	while(1);	/* Halt */}voidsetup_normal_output_buffer(){	output_data = (char *)KERNEL_LOAD_ADR;}voiddecompress_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 2.4\n");		while(1);	}	puts("Uncompressing Linux...\n");	gunzip();	puts("Done. Now booting the kernel.\n");}