/* * 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/config.h>#include <asm/uaccess.h>#ifdef CONFIG_SH_STANDARD_BIOS#include <asm/sh_bios.h>#endif/* * 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 = 0;  /* valid bytes in inbuf */static unsigned inptr = 0;   /* index of next byte to be processed in inbuf */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()  (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 int input_len;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 *);  extern int _text;		/* Defined in vmlinux.lds.S */extern int _end;static unsigned long free_mem_ptr;static unsigned long free_mem_end_ptr; #define HEAP_SIZE             0x10000#include "../../../../lib/inflate.c"static 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_end_ptr)		error("\nOut of memory\n");	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;}#ifdef CONFIG_SH_STANDARD_BIOSstatic int strlen(const char *s){	int i = 0;	while (*s++)		i++;	return i;}void puts(const char *s){	sh_bios_console_write(s, strlen(s));}#elsevoid puts(const char *s){  /* This should be updated to use the sh-sci routines */}#endifvoid* 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\n");	}	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("\n\n");	puts(x);	puts("\n\n -- System halted");	while(1);	/* Halt */}#define STACK_SIZE (4096)long user_stack [STACK_SIZE];long* stack_start = &user_stack[STACK_SIZE];void decompress_kernel(void){	output_data = 0;	output_ptr = (unsigned long)&_text+0x20001000;	free_mem_ptr = (unsigned long)&_end;	free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;	makecrc();	puts("Uncompressing Linux... ");	gunzip();	puts("Ok, booting the kernel.\n");}