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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2015 Intel Corp.
* (Written by Andrey Petrov <andrey.petrov@intel.com> for Intel Corp.)
*
* 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.
*/
/*
* The device_t returned by dev_find_slot() is different than the device_t
* passed to pci_write_config32(). If one needs to get access to the config.h
* of a device and perform i/o things are incorrect. One is a pointer while
* the other is a 32-bit integer.
*/
#define __SIMPLE_DEVICE__
#include <arch/io.h>
#include <assert.h>
#include <cbmem.h>
#include "chip.h"
#include <device/pci.h>
#include <fsp/memmap.h>
#include <intelblocks/smm.h>
#include <soc/systemagent.h>
#include <soc/pci_devs.h>
void *cbmem_top(void)
{
const struct device *dev;
const config_t *config;
void *tolum = (void *)sa_get_tseg_base();
if (!IS_ENABLED(CONFIG_SOC_INTEL_GLK))
return tolum;
dev = dev_find_slot(0, PCH_DEVFN_LPC);
assert(dev != NULL);
config = dev->chip_info;
if (!config)
die("Failed to get chip_info\n");
/* FSP allocates 2x PRMRR Size Memory for alignment */
if (config->sgx_enable)
tolum -= config->PrmrrSize * 2;
return tolum;
}
int smm_subregion(int sub, void **start, size_t *size)
{
uintptr_t sub_base;
size_t sub_size;
void *smm_base;
const size_t cache_size = CONFIG_SMM_RESERVED_SIZE;
smm_region_info(&smm_base, &sub_size);
sub_base = (uintptr_t)smm_base;
assert(sub_size > CONFIG_SMM_RESERVED_SIZE);
switch (sub) {
case SMM_SUBREGION_HANDLER:
/* Handler starts at the base of TSEG. */
sub_size -= cache_size;
break;
case SMM_SUBREGION_CACHE:
/* External cache is in the middle of TSEG. */
sub_base += sub_size - cache_size;
sub_size = cache_size;
break;
default:
return -1;
}
*start = (void *)sub_base;
*size = sub_size;
return 0;
}
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