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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2018-2020 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; 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 <device/pci_def.h>
#include <intelblocks/cse.h>
#include <intelblocks/p2sb.h>
#include <intelblocks/pcr.h>
#include <intelblocks/smihandler.h>
#include <soc/soc_chip.h>
#include <soc/pci_devs.h>
#include <soc/pcr_ids.h>
#include <soc/pm.h>
#define CSME0_FBE 0xf
#define CSME0_BAR 0x0
#define CSME0_FID 0xb0
static void pch_disable_heci(void)
{
struct pcr_sbi_msg msg = {
.pid = PID_CSME0,
.offset = 0,
.opcode = PCR_WRITE,
.is_posted = false,
.fast_byte_enable = CSME0_FBE,
.bar = CSME0_BAR,
.fid = CSME0_FID
};
/* Bit 0: Set to make HECI#1 Function disable */
uint32_t data32 = 1;
uint8_t response;
int status;
/* unhide p2sb device */
p2sb_unhide();
/* Send SBI command to make HECI#1 function disable */
status = pcr_execute_sideband_msg(&msg, &data32, &response);
if (status && response)
printk(BIOS_ERR, "Fail to make CSME function disable\n");
/* Ensure to Lock SBI interface after this command */
p2sb_disable_sideband_access();
/* hide p2sb device */
p2sb_hide();
}
/*
* Specific SOC SMI handler during ramstage finalize phase
*
* BIOS can't make CSME function disable as is due to POSTBOOT_SAI
* restriction in place from ICP chipset. Hence create SMI Handler to
* perform CSME function disabling logic during SMM mode.
*/
void smihandler_soc_at_finalize(void)
{
const struct soc_intel_icelake_config *config;
config = config_of_soc();
if (!config->HeciEnabled && CONFIG(HECI_DISABLE_USING_SMM))
pch_disable_heci();
}
const smi_handler_t southbridge_smi[SMI_STS_BITS] = {
[SMI_ON_SLP_EN_STS_BIT] = smihandler_southbridge_sleep,
[APM_STS_BIT] = smihandler_southbridge_apmc,
[PM1_STS_BIT] = smihandler_southbridge_pm1,
[GPE0_STS_BIT] = smihandler_southbridge_gpe0,
[GPIO_STS_BIT] = smihandler_southbridge_gpi,
[ESPI_SMI_STS_BIT] = smihandler_southbridge_espi,
[MCSMI_STS_BIT] = smihandler_southbridge_mc,
[TCO_STS_BIT] = smihandler_southbridge_tco,
[PERIODIC_STS_BIT] = smihandler_southbridge_periodic,
[MONITOR_STS_BIT] = smihandler_southbridge_monitor,
};
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