aboutsummaryrefslogtreecommitdiff
path: root/src/soc/intel/skylake/lockdown.c
blob: 1dd4e564d094c530c2d996d3f080f5e49419c358 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
/* SPDX-License-Identifier: GPL-2.0-only */

#include <device/mmio.h>
#include <intelblocks/cfg.h>
#include <intelblocks/pmclib.h>
#include <intelpch/lockdown.h>
#include <soc/pm.h>

static void pmc_lockdown_config(void)
{
	uint8_t *pmcbase;
	u32 pmsyncreg;

	/* PMSYNC */
	pmcbase = pmc_mmio_regs();
	pmsyncreg = read32(pmcbase + PMSYNC_TPR_CFG);
	pmsyncreg |= PMSYNC_LOCK;
	write32(pmcbase + PMSYNC_TPR_CFG, pmsyncreg);

	/* Make sure payload/OS can't trigger global reset */
	pmc_global_reset_disable_and_lock();
}

void soc_lockdown_config(int chipset_lockdown)
{
	/* PMC lock down configuration */
	pmc_lockdown_config();
}