/* * arch/mips/dec/decstation.c */#include <linux/config.h>#define RELOC#define INITRD#define DEBUG_BOOT/* * Magic number indicating REX PROM available on DECSTATION. */#define	REX_PROM_MAGIC		0x30464354#define REX_PROM_CLEARCACHE	0x7c/4#define REX_PROM_PRINTF		0x30/4#define VEC_RESET		0xBFC00000		/* Prom base address */#define	PMAX_PROM_ENTRY(x)	(VEC_RESET+((x)*8))	/* Prom jump table */#define	PMAX_PROM_PRINTF	PMAX_PROM_ENTRY(17)#define PARAM	(k_start + 0x2000)#define LOADER_TYPE (*(unsigned char *) (PARAM+0x210))#define INITRD_START (*(unsigned long *) (PARAM+0x218))#define INITRD_SIZE (*(unsigned long *) (PARAM+0x21c))extern int _ftext, _end;		/* begin and end of kernel image */extern void *__rd_start, *__rd_end;	/* begin and end of ramdisk image */extern void kernel_entry(int, char **, unsigned long, int *);void * memcpy(void * dest, const void *src, unsigned int count){	unsigned long *tmp = (unsigned long *) dest, *s = (unsigned long *) src;	count >>= 2;	while (count--)		*tmp++ = *s++;	return dest;}void dec_entry(int argc, char **argv,	       unsigned long magic, int *prom_vec){	void (*rex_clear_cache)(void);	int (*prom_printf)(char *, ...);	unsigned long k_start, len;	/*	 * The DS5100 leaves cpu with BEV enabled, clear it.	 */	asm(	"lui\t$8,0x3000\n\t"		"mtc0\t$8,$12\n\t"		".section\t.sdata\n\t"		".section\t.sbss\n\t"		".section\t.text"		: : : "$8");#ifdef DEBUG_BOOT	if (magic == REX_PROM_MAGIC) {	prom_printf = (int (*)(char *, ...)) *(prom_vec + REX_PROM_PRINTF);	} else {		prom_printf = (int (*)(char *, ...)) PMAX_PROM_PRINTF;	}	prom_printf("Launching kernel...\n");#endif	k_start = (unsigned long) (&kernel_entry) & 0xffff0000;#ifdef RELOC	/*	 * Now copy kernel image to it's destination.	 */	len = ((unsigned long) (&_end) - k_start);	memcpy((void *)k_start, &_ftext, len);#endif	if (magic == REX_PROM_MAGIC) {		rex_clear_cache = (void (*)(void)) * (prom_vec + REX_PROM_CLEARCACHE);		rex_clear_cache();	}#ifdef CONFIG_BLK_DEV_INITRD	LOADER_TYPE = 1;	INITRD_START = (long)&__rd_start;	INITRD_SIZE = (long)&__rd_end - (long)&__rd_start;#endif	kernel_entry(argc, argv, magic, prom_vec);}