/* * BK Id: SCCS/s.main.c 1.13 07/27/01 20:24:17 trini *//* * Copyright (C) Paul Mackerras 1997. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */#include "nonstdio.h"#include <asm/processor.h>extern char _end[];extern char initrd_data[];extern char image_data[];extern char sysmap_data[];extern int getprop(void *, const char *, void *, int);extern int initrd_len;extern int image_len;extern int sysmap_len;extern unsigned int heap_max;extern void claim(unsigned int virt, unsigned int size, unsigned int align);extern void *finddevice(const char *);extern void flush_cache(void *, unsigned long);extern void gunzip(void *, int, unsigned char *, int *);extern void make_bi_recs(unsigned long addr, char *name, unsigned int mach,		unsigned int progend);extern void pause(void);char *avail_ram;char *begin_avail, *end_avail;char *avail_high;#define RAM_START	0x00000000#define RAM_END		(64<<20)#define BOOT_START	((unsigned long)_start)#define BOOT_END	((unsigned long)(_end + 0xFFF) & ~0xFFF)#define RAM_FREE	((unsigned long)(_end+0x1000)&~0xFFF)#define PROG_START	0x00010000#define PROG_SIZE	0x00400000 /* 4MB */#define SCRATCH_SIZE	(128 << 10)static char scratch[SCRATCH_SIZE];	/* 1MB of scratch space for gunzip */voidchrpboot(int a1, int a2, void *prom){    unsigned sa, len;    void *dst;    unsigned char *im;    unsigned initrd_start=0, initrd_size=0;    extern char _start;        printf("chrpboot starting: loaded at 0x%p\n\r", &_start);    if (initrd_len) {	initrd_size = initrd_len;	initrd_start = (RAM_END - initrd_size) & ~0xFFF;	claim(initrd_start, RAM_END - initrd_start, 0);	printf("initial ramdisk moving 0x%x <- 0x%p (%x bytes)\n\r",	       initrd_start, initrd_data, initrd_size);	memcpy((char *)initrd_start, initrd_data, initrd_size);    }    im = image_data;    len = image_len;    /* claim 4MB starting at PROG_START */    claim(PROG_START, PROG_SIZE - PROG_START, 0);    dst = (void *) PROG_START;    if (im[0] == 0x1f && im[1] == 0x8b) {	avail_ram = scratch;	begin_avail = avail_high = avail_ram;	end_avail = scratch + sizeof(scratch);	printf("gunzipping (0x%p <- 0x%p:0x%p)...", dst, im, im+len);	gunzip(dst, 0x400000, im, &len);	printf("done %u bytes\n\r", len);	printf("%u bytes of heap consumed, max in use %u\n\r",	       avail_high - begin_avail, heap_max);    } else {	memmove(dst, im, len);    }    flush_cache(dst, len);    make_bi_recs(((unsigned long) dst + len), "chrpboot", _MACH_chrp,		    (PROG_START + PROG_SIZE));        sa = (unsigned long)PROG_START;    printf("start address = 0x%x\n\r", sa);    (*(void (*)())sa)(a1, a2, prom, initrd_start, initrd_size);    printf("returned?\n\r");    pause();}