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 2002/05/08 19:23:00 patrik Exp $ */

/*
 * Copyright (c) 2002 Patrik Lindergren (www.lindergren.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 by Patrik Lindergren.
 * 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 <pmon/dev/mpc107reg.h>
#include <dev/pci/pcivar.h>
#include <pmon.h>

/*
 *  Flash programming support code.
 */

/*
 *  Table of flash devices on target. See pflash_tgt.h.
 */

struct fl_map tgt_fl_map[] = {
	{ USERFLASH_BASE,  USERFLASH_SIZE,  1, 1, FL_BUS_8, 0},
	{ BOOTFLASH1_BASE, BOOTFLASH1_SIZE, 1, 1, FL_BUS_8, 0},	
	{ BOOTFLASH2_BASE, BOOTFLASH2_SIZE, 1, 1, FL_BUS_8, 0},	
	{ 0x00000000, 0x00000000 }
};


void
tgt_flashinit()
{
#if 0   
	unsigned int cfg;

	cfg = inl(CONFIG_REGISTER) & CFG_REG_MASK;

	switch(CFG_REG_FLASHSIZE(cfg)) {
		case 0: /* 32 MB UserFlash */
			tgt_fl_map[0].fl_map_size = 0x02000000;
			tgt_fl_map[0].fl_map_width = 4;
			tgt_fl_map[0].fl_map_chips = 2;
			break;
		case 1: /* 64 MB UserFlash */
			tgt_fl_map[0].fl_map_size = 0x04000000;
			tgt_fl_map[0].fl_map_width = 8;
			tgt_fl_map[0].fl_map_chips = 4;
			break;
	}
#endif
}

struct fl_map *
tgt_flashmap()
{
	return(tgt_fl_map);
}

void
tgt_flashwrite_disable()
{
	pcitag_t tag;
	pcireg_t reg;
	
	tag = _pci_make_tag(0, 0, 0);
	reg = _pci_conf_read(tag, MPC107_CFG_PICR1);
	reg &= MPC107_PICR1_FLASH_WR_EN;
	_pci_conf_write(tag, MPC107_CFG_PICR1, reg);
}

int
tgt_flashwrite_enable()
{
	pcitag_t tag;
	pcireg_t reg;

	tag = _pci_make_tag(0, 0, 0);
	reg = _pci_conf_read(tag, MPC107_CFG_PICR1);
	reg |= MPC107_PICR1_FLASH_WR_EN;
	_pci_conf_write(tag, MPC107_CFG_PICR1, reg);
	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 - NVRAM_MAXSIZE;
	}
	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");
	}
}