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/*
* (C) Copyright 2001
* Humboldt Solutions Ltd, adrian@humboldt.co.uk.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#include <arch/io.h>
#include "../nvram.h"
static unsigned bsp_size(struct nvram_device *data)
{
return 8 * 1024;
}
static int bsp_read_block(struct nvram_device *dev, unsigned offset,
unsigned char *data, unsigned length)
{
unsigned i;
for(i = 0; i < length; i++)
{
outb(((offset + i) >> 8) & 0xff, 0x74);
outb((offset + i) & 0xff, 0x75);
data[i] = inb(0x76);
}
return length;
}
static int bsp_write_byte(struct nvram_device *data, unsigned offset, unsigned char byte)
{
outb((offset >> 8) & 0xff, 0x74);
outb(offset & 0xff, 0x75);
outb(byte, 0x76);
return 1;
}
nvram_device bsp_nvram = {
bsp_size, bsp_read_block, bsp_write_byte, 0, 0
};
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