From 649709c6fccedc9909fc21f3813185d3c64b3539 Mon Sep 17 00:00:00 2001
From: Subrata Banik <subratabanik@google.com>
Date: Wed, 12 Jul 2023 11:35:01 +0530
Subject: soc/intel/common/acpi: Add IOE PS2B access APIs

This patch implements APIs to access PCR registers from IOE die.

BUG=b:290856936
TEST=Able to build and boot google/rex.

Change-Id: Ief7a00c4e81048f87ee308e659faeba3fde4c9cd
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76409
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
---
 src/soc/intel/common/acpi/ioe_pcr.asl | 46 +++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 src/soc/intel/common/acpi/ioe_pcr.asl

(limited to 'src/soc/intel/common/acpi/ioe_pcr.asl')

diff --git a/src/soc/intel/common/acpi/ioe_pcr.asl b/src/soc/intel/common/acpi/ioe_pcr.asl
new file mode 100644
index 0000000000..7f532606af
--- /dev/null
+++ b/src/soc/intel/common/acpi/ioe_pcr.asl
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include "pcrlib.asl"
+
+/* APIs to access P2SB inside IOE die */
+
+/*
+ * Calculate PCR register base at specified PID
+ * Arg0 - PCR Port ID
+ */
+Method (ICRB, 1, NotSerialized)
+{
+	Return (GPCR(IOE_P2SB, Arg0))
+}
+
+/*
+ * Read a PCR register at specified PID and offset
+ * Arg0 - PCR Port ID
+ * Arg1 - Register Offset
+ */
+Method (ICRR, 2, Serialized)
+{
+	Return (RPCR(IOE_P2SB, Arg0, Arg1))
+}
+
+/*
+ * AND a value with PCR register at specified PID and offset
+ * Arg0 - PCR Port ID
+ * Arg1 - Register Offset
+ * Arg2 - Value to AND
+ */
+Method (ICRA, 3, Serialized)
+{
+	APCR(IOE_P2SB, Arg0, Arg1, Arg2)
+}
+
+/*
+ * OR a value with PCR register at specified PID and offset
+ * Arg0 - PCR Port ID
+ * Arg1 - Register Offset
+ * Arg2 - Value to OR
+ */
+Method (ICRO, 3, Serialized)
+{
+	OPCR(IOE_P2SB, Arg0, Arg1, Arg2)
+}
-- 
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