From 2787237dd52550b5d7e1dc3dabcf380126ff804c Mon Sep 17 00:00:00 2001
From: Kyösti Mälkki <kyosti.malkki@gmail.com>
Date: Thu, 21 Jan 2021 16:05:26 +0200
Subject: ACPI: Add helpers for CBMEM_ID_POWER_STATE
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Create uniform logging for the (unlikely) case of a CBMEM
entry disappearing.

Change-Id: I7c5414a03d869423c8ae5192a990fde5f9582f2d
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49817
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
---
 src/acpi/Makefile.inc |  4 ++--
 src/acpi/acpi_pm.c    | 43 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 45 insertions(+), 2 deletions(-)

(limited to 'src/acpi')

diff --git a/src/acpi/Makefile.inc b/src/acpi/Makefile.inc
index 1cd837dd88..4d8f3ad892 100644
--- a/src/acpi/Makefile.inc
+++ b/src/acpi/Makefile.inc
@@ -3,7 +3,6 @@
 ifeq ($(CONFIG_HAVE_ACPI_TABLES),y)
 
 ramstage-y += acpi.c
-ramstage-y += acpi_pm.c
 ramstage-y += acpigen.c
 ramstage-y += acpigen_dptf.c
 ramstage-y += acpigen_dsm.c
@@ -17,7 +16,8 @@ ramstage-y += pld.c
 ramstage-y += sata.c
 ramstage-y += soundwire.c
 
-postcar-y += acpi_pm.c
+all-y += acpi_pm.c
+smm-y += acpi_pm.c
 
 ifneq ($(wildcard src/mainboard/$(MAINBOARDDIR)/acpi_tables.c),)
 ramstage-srcs += src/mainboard/$(MAINBOARDDIR)/acpi_tables.c
diff --git a/src/acpi/acpi_pm.c b/src/acpi/acpi_pm.c
index c1e99962a9..bee5616e57 100644
--- a/src/acpi/acpi_pm.c
+++ b/src/acpi/acpi_pm.c
@@ -1,6 +1,9 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <acpi/acpi.h>
+#include <acpi/acpi_pm.h>
+#include <cbmem.h>
+#include <console/console.h>
 #include <smbios.h>
 
 void __weak mainboard_suspend_resume(void)
@@ -24,3 +27,43 @@ uint8_t acpi_get_preferred_pm_profile(void)
 		return PM_UNSPECIFIED;
 	}
 }
+
+struct chipset_power_state *acpi_get_pm_state(void)
+{
+	static struct chipset_power_state *acpi_pm_state;
+	if (acpi_pm_state)
+		return acpi_pm_state;
+
+	acpi_pm_state = cbmem_find(CBMEM_ID_POWER_STATE);
+	return acpi_pm_state;
+}
+
+int acpi_pm_state_for_elog(const struct chipset_power_state **ps)
+{
+	*ps = acpi_get_pm_state();
+	if (!*ps) {
+		printk(BIOS_ERR, "No CBMEM_ID_POWER_STATE entry, no event recorded in ELOG.\n");
+		return -1;
+	}
+	return 0;
+}
+
+int acpi_pm_state_for_rtc(const struct chipset_power_state **ps)
+{
+	*ps = acpi_get_pm_state();
+	if (!*ps) {
+		printk(BIOS_ERR, "No CBMEM_ID_POWER_STATE entry, RTC init aborted.\n");
+		return -1;
+	}
+	return 0;
+}
+
+int acpi_pm_state_for_wake(const struct chipset_power_state **ps)
+{
+	*ps = acpi_get_pm_state();
+	if (!*ps) {
+		printk(BIOS_ERR, "No CBMEM_ID_POWER_STATE entry, wake source unknown.\n");
+		return -1;
+	}
+	return 0;
+}
-- 
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