src/soc/intel/skylake/lockdown.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <device/mmio.h>
   4 #include <intelblocks/cfg.h>
   5 #include <intelblocks/pmclib.h>
   6 #include <intelpch/lockdown.h>
   7 #include <soc/pm.h>
   8
   9 static void pmc_lockdown_config(void)
  10 {
  11         uint8_t *pmcbase;
  12         u32 pmsyncreg;
  13
  14         /* PMSYNC */
  15         pmcbase = pmc_mmio_regs();
  16         pmsyncreg = read32(pmcbase + PMSYNC_TPR_CFG);
  17         pmsyncreg |= PMSYNC_LOCK;
  18         write32(pmcbase + PMSYNC_TPR_CFG, pmsyncreg);
  19
  20         /* Make sure payload/OS can't trigger global reset */
  21         pmc_global_reset_disable_and_lock();
  22 }
  23
  24 void soc_lockdown_config(int chipset_lockdown)
  25 {
  26         /* PMC lock down configuration */
  27         pmc_lockdown_config();
  28 }