/* * 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/kernel.h>#include <asm/uaccess.h>#include <asm/arch/uncompress.h>#include <asm/proc/uncompress.h>#ifdef STANDALONE_DEBUG#define puts printf#endif#define __ptr_t void */* * Optimised C version of memzero for the ARM. */void __memzero (__ptr_t s, size_t n){	union { void *vp; unsigned long *ulp; unsigned char *ucp; } u;	int i;	u.vp = s;	for (i = n >> 5; i > 0; i--) {		*u.ulp++ = 0;		*u.ulp++ = 0;		*u.ulp++ = 0;		*u.ulp++ = 0;		*u.ulp++ = 0;		*u.ulp++ = 0;		*u.ulp++ = 0;		*u.ulp++ = 0;	}	if (n & 1 << 4) {		*u.ulp++ = 0;		*u.ulp++ = 0;		*u.ulp++ = 0;		*u.ulp++ = 0;	}	if (n & 1 << 3) {		*u.ulp++ = 0;		*u.ulp++ = 0;	}	if (n & 1 << 2)		*u.ulp++ = 0;	if (n & 1 << 1) {		*u.ucp++ = 0;		*u.ucp++ = 0;	}	if (n & 1)		*u.ucp++ = 0;}static inline __ptr_t memcpy(__ptr_t __dest, __const __ptr_t __src,			    size_t __n){	int i = 0;	unsigned char *d = (unsigned char *)__dest, *s = (unsigned char *)__src;	for (i = __n >> 3; i > 0; i--) {		*d++ = *s++;		*d++ = *s++;		*d++ = *s++;		*d++ = *s++;		*d++ = *s++;		*d++ = *s++;		*d++ = *s++;		*d++ = *s++;	}	if (__n & 1 << 2) {		*d++ = *s++;		*d++ = *s++;		*d++ = *s++;		*d++ = *s++;	}	if (__n & 1 << 1) {		*d++ = *s++;		*d++ = *s++;	}	if (__n & 1)		*d++ = *s++;	return __dest;}/* * gzip delarations */#define OF(args)  args#define STATIC statictypedef 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())/* 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[];extern char input_data_end[];static uch *output_data;static ulg output_ptr;static ulg bytes_out;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 *);extern int end;static ulg free_mem_ptr;static ulg free_mem_ptr_end;#define HEAP_SIZE 0x2000#include "../../../../lib/inflate.c"#ifndef STANDALONE_DEBUGstatic void *malloc(int size){	void *p;	if (size <0) error("Malloc error\n");	if (free_mem_ptr <= 0) error("Memory error\n");	free_mem_ptr = (free_mem_ptr + 3) & ~3;	/* Align */	p = (void *)free_mem_ptr;	free_mem_ptr += size;	if (free_mem_ptr >= free_mem_ptr_end)		error("Out of memory");	return p;}static void free(void *where){ /* gzip_mark & gzip_release do the free */}static void gzip_mark(void **ptr){	arch_decomp_wdog();	*ptr = (void *) free_mem_ptr;}static void gzip_release(void **ptr){	arch_decomp_wdog();	free_mem_ptr = (long) *ptr;}#elsestatic void gzip_mark(void **ptr){}static void gzip_release(void **ptr){}#endif/* =========================================================================== * Fill the input buffer. This is called only when the buffer is empty * and at least one byte is really needed. */int fill_inbuf(void){	if (insize != 0)		error("ran out of input data\n");	inbuf = input_data;	insize = &input_data_end[0] - &input_data[0];	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.) */void flush_window(void){	ulg c = crc;	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;	puts(".");}static void error(char *x){	int ptr;	puts("\n\n");	puts(x);	puts("\n\n -- System halted");	while(1);	/* Halt */}#ifndef STANDALONE_DEBUGulgdecompress_kernel(ulg output_start, ulg free_mem_ptr_p, ulg free_mem_ptr_end_p,		  int arch_id){	output_data		= (uch *)output_start;	/* Points to kernel start */	free_mem_ptr		= free_mem_ptr_p;	free_mem_ptr_end	= free_mem_ptr_end_p;	__machine_arch_type	= arch_id;	proc_decomp_setup();	arch_decomp_setup();	makecrc();	puts("Uncompressing Linux...");	gunzip();	puts(" done, booting the kernel.\n");	return output_ptr;}#elsechar output_buffer[1500*1024];int main(){	output_data = output_buffer;	makecrc();	puts("Uncompressing Linux...");	gunzip();	puts("done.\n");	return 0;}#endif