src/soc/amd/picasso/finalize.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <arch/acpi.h>
  16 #include <cpu/x86/mp.h>
  17 #include <cpu/x86/msr.h>
  18 #include <cpu/amd/msr.h>
  19 #include <bootstate.h>
  20 #include <timer.h>
  21 #include <console/console.h>
  22 #include <amdblocks/acpi.h>
  23
  24 static void per_core_finalize(void *unused)
  25 {
  26         msr_t hwcr, mask;
  27
  28         /* Finalize SMM settings */
  29         hwcr = rdmsr(HWCR_MSR);
  30         if (hwcr.lo & SMM_LOCK) /* Skip if already locked, avoid GPF */
  31                 return;
  32
  33         if (CONFIG(HAVE_SMI_HANDLER)) {
  34                 mask = rdmsr(SMM_MASK_MSR);
  35                 mask.lo |= SMM_TSEG_VALID;
  36                 wrmsr(SMM_MASK_MSR, mask);
  37         }
  38
  39         hwcr.lo |= SMM_LOCK;
  40         wrmsr(HWCR_MSR, hwcr);
  41 }
  42
  43 static void finalize_cores(void)
  44 {
  45         int r;
  46         printk(BIOS_SPEW, "Lock SMM configuration\n");
  47
  48         r = mp_run_on_all_cpus(per_core_finalize, NULL);
  49         if (r)
  50                 printk(BIOS_WARNING, "Failed to finalize all cores\n");
  51 }
  52
  53 static void soc_finalize(void *unused)
  54 {
  55         finalize_cores();
  56
  57         if (!acpi_is_wakeup_s3()) {
  58                 if (CONFIG(HAVE_SMI_HANDLER))
  59                         acpi_disable_sci();
  60                 else
  61                         acpi_enable_sci();
  62         }
  63
  64         post_code(POST_OS_BOOT);
  65 }
  66
  67 BOOT_STATE_INIT_ENTRY(BS_OS_RESUME, BS_ON_ENTRY, soc_finalize, NULL);
  68 BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_EXIT, soc_finalize, NULL);