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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007 Corey Osgood <corey@slightlyhackish.com>
*
* 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
*/
#ifndef NORTHBRIDGE_INTEL_I82810_RAMINIT_H
#define NORTHBRIDGE_INTEL_I82810_RAMINIT_H
/* The 82810 supports max. 2 dual-sided DIMMs. */
#define DIMM_SOCKETS 2
/* DIMM0 is at 0x50, DIMM1 is at 0x51. */
#define DIMM_SPD_BASE 0x50
/* The following table has been bumped over to this header to avoid clutter in
* raminit.c. It's used to translate the value read from SPD Byte 31 to a value
* the northbridge can understand in DRP, aka Rx52[7:4], [3:0]. Where most
* northbridges have some sort of simple calculation that can be done for this,
* I haven't yet figured out one for this northbridge. Until someone does,
* this table is necessary.
*/
/* TODO: Find a better way of doing this. */
static const uint8_t translate_spd_to_i82810[] = {
/* Note: 4MB sizes are not supported, so dual-sided DIMMs with a 4MB
* side can't be either, at least for now.
*/
/* TODO: For above case, only use the other side if > 4MB, and get some
* of these DIMMs to test it with. Same for unsupported 128/x sizes.
*/
/* SPD Byte 31 Memory Size [Side 1/2] */
0xff, /* 0x01 No memory */
0xff, /* 0x01 4/0 */
0x01, /* 0x02 8/0 */
0xff, /* 0x03 8/4 */
0x04, /* 0x04 16/0 or 16 */
0xff, /* 0x05 16/4 */
0x05, /* 0x06 16/8 */
0xff, /* 0x07 Invalid */
0x07, /* 0x08 32/0 or 32 */
0xff, /* 0x09 32/4 */
0xff, /* 0x0A 32/8 */
0xff, /* 0x0B Invalid */
0x08, /* 0x0C 32/16 */
0xff, 0xff, 0xff, /* 0x0D-0F Invalid */
0x0a, /* 0x10 64/0 or 64 */
0xff, /* 0x11 64/4 */
0xff, /* 0x12 64/8 */
0xff, /* 0x13 Invalid */
0xff, /* 0x14 64/16 */
0xff, 0xff, 0xff, /* 0x15-17 Invalid */
0x0b, /* 0x18 64/32 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 0x19-1f Invalid */
0x0d, /* 0x20 128/0 or 128 */
/* These configurations are not supported by the i810 */
0xff, /* 0x21 128/4 */
0xff, /* 0x22 128/8 */
0xff, /* 0x23 Invalid */
0xff, /* 0x24 128/16 */
0xff, 0xff, 0xff, /* 0x25-27 Invalid */
0xff, /* 0x28 128/32 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 0x29-2f Invalid */
0x0e, /* 0x30 128/64 */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, /* 0x31-3f Invalid */
0x0f, /* 0x40 256/0 or 256 */
/* Anything larger is not supported by the 82810. */
};
#endif /* NORTHBRIDGE_INTEL_I82810_RAMINIT_H */
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