tgt_flash.c

MIPS处理器的bootloader,龙芯就是用的修改过的PMON2

/*	$Id: tgt_flash.c,v 1.1.1.2 2003/03/18 22:34:31 anoncvs Exp $ */

/*
 * Copyright (c) 2001 ipUnplugged AB (www.ipunplugged.com)
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed for Patrik Lindergren, by
 *	ipUnplugged AB, Sweden.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

#include <sys/types.h>
#include <stdio.h>
#include <setjmp.h>
#include <termio.h>
#include <string.h>

#include <machine/cpu.h>
#include <machine/pio.h>

#include <pflash.h>
#include <dev/pflash_tgt.h>

#include <include/palomarii.h>
#include <pmon/dev/cpc700.h>
#include <pmon/dev/cpc700_iic.h>
#include <pmon.h>

/*
 *  Flash programming support code.
 */

/*
 *  Table of flash devices on target. See pflash_tgt.h.
 */
struct fl_map tgt_fl_map_amd[] = {
	TARGET_FLASH_DEVICES_AMD
};
struct fl_map tgt_fl_map_intel[] = {
	TARGET_FLASH_DEVICES_INTEL
};

struct fl_map *
tgt_flashmap()
{
	if(inb(PALOMAR_RST_STAT) & PALOMAR_RST_BOOT) {
		return(tgt_fl_map_amd);
	}
	else {
		return(tgt_fl_map_intel);
	}
}

void
tgt_flashwrite_disable()
{
	out32(CPC700_MEMCFGADDR, CPC700_FWEN);
	out32(CPC700_MEMCFGADDR+4, in32(CPC700_MEMCFGADDR+4) & 0x3fffffff);
}

int
tgt_flashwrite_enable()
{
	out32(CPC700_MEMCFGADDR, CPC700_FWEN);
	out32(CPC700_MEMCFGADDR+4, in32(CPC700_MEMCFGADDR+4) | 0xc0000000);
	return(1);
}

void
tgt_flashinfo(void *p, size_t *t)
{
	struct fl_map *map;

	map = fl_find_map(p);
	if(map) {
		*t = map->fl_map_size;
	}
	else {
		*t = 0;
	}
}

void
tgt_flashprogram(void *p, int size, void *s, int endian)
{
	printf("Programming flash %p:%p into %p\n", s, size, p);
	if(fl_erase_device(p, size, TRUE)) {
		printf("Erase failed!\n");
		return;
	}
	if(fl_program_device(p, s, size, TRUE)) {
		printf("Programming failed!\n");
	}
}