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soc/intel/common: Add IGD OpRegion support

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Add helper function that fills OpRegion structure based on
VBT file content and some reasonable defaults.

Change-Id: I9aa8862878cc016a9a684c844ceab390734f3e84
Signed-off-by: Andrey Petrov <andrey.petrov@intel.com>
Reviewed-on: https://review.coreboot.org/14806
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Andrey Petrov
2016-05-12 19:10:11 -07:00
committed by Aaron Durbin
parent 060b215fa7
commit dc4ae11366
5 changed files with 265 additions and 0 deletions
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59
src/soc/intel/common/opregion.c Normal file
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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2016 Intel Inc.
*
* 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; version 2 of the License.
*
* 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.
*/
#include <console/console.h>
#include <string.h>
#include "gma.h"
#include "opregion.h"
#include "vbt.h"
int init_igd_opregion(igd_opregion_t *opregion)
{
struct region_device vbt_rdev;
optionrom_vbt_t *vbt;
if (locate_vbt(&vbt_rdev) == CB_ERR) {
printk(BIOS_ERR, "VBT not found\n");
return 0;
};
vbt = rdev_mmap_full(&vbt_rdev);
if (!vbt) {
printk(BIOS_ERR, "VBT couldn't be read\n");
return 0;
}
memset(opregion, 0, sizeof(igd_opregion_t));
memcpy(&opregion->header.signature, IGD_OPREGION_SIGNATURE,
sizeof(IGD_OPREGION_SIGNATURE));
memcpy(opregion->header.vbios_version, vbt->coreblock_biosbuild,
ARRAY_SIZE(vbt->coreblock_biosbuild));
memcpy(opregion->vbt.gvd1, vbt, MIN(vbt->hdr_vbt_size,
sizeof(opregion->vbt.gvd1)));
/* 8KiB */
opregion->header.size = sizeof(igd_opregion_t) / KiB;
opregion->header.version = IGD_OPREGION_VERSION;
/* FIXME We just assume we're mobile for now */
opregion->header.mailboxes = MAILBOXES_MOBILE;
rdev_munmap(&vbt_rdev, vbt);
return 1;
}