From 1d6eeff17137d86a09673b589ea5c1fba174a02b Mon Sep 17 00:00:00 2001
From: Naresh Solanki <naresh.solanki@9elements.com>
Date: Thu, 16 Nov 2023 18:25:38 +0530
Subject: [PATCH] acpi: Enable 64bit ECAM resource

Adjust ACPI DSDT to support ECAM resource above 4GB by modifying the PCI
ECAM Resource Consumption settings. The changes include specifying a
QWordMemory resource template, accommodating non-cacheable, read-write
attributes, and adjusting the address range.

Change-Id: Idb049d848f2311e27df5279a10c33f9fab259c08
Signed-off-by: Naresh Solanki <naresh.solanki@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79096
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Reviewed-by: Maximilian Brune <maximilian.brune@9elements.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Nico Huber <nico.h@gmx.de>
---
 src/acpi/dsdt_top.asl | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/src/acpi/dsdt_top.asl b/src/acpi/dsdt_top.asl
index 6a0129fd7b..7539f00e57 100644
--- a/src/acpi/dsdt_top.asl
+++ b/src/acpi/dsdt_top.asl
@@ -57,11 +57,27 @@ Scope(\_SB) {
 	Device (PERC)	// PCI ECAM Resource Consumption
 	{
 		Name (_HID, EisaId("PNP0C02"))
-		Name (_CRS, ResourceTemplate()
+		Method (_CRS, 0, Serialized)
 		{
-			Memory32Fixed (ReadWrite, CONFIG_ECAM_MMCONF_BASE_ADDRESS,
-			CONFIG_ECAM_MMCONF_LENGTH)
-		})
+			Name (RBUF, ResourceTemplate ()
+			{
+				QWordMemory (ResourceConsumer, PosDecode, MinFixed, MaxFixed,
+				    NonCacheable, ReadWrite,
+				    0x0000000000000000, // Granularity
+				    0x0000000000000000, // _MIN
+				    0x0000000000000001, // _MAX
+				    0x0000000000000000, // Translation
+				    0x0000000000000002, // _Len
+				    ,, _Y00, AddressRangeMemory, TypeStatic)
+			})
+			CreateQWordField (RBUF, \_SB.PERC._CRS._Y00._MIN, MIN1)
+			CreateQWordField (RBUF, \_SB.PERC._CRS._Y00._MAX, MAX1)
+			CreateQWordField (RBUF, \_SB.PERC._CRS._Y00._LEN, LEN1)
+			MIN1 = CONFIG_ECAM_MMCONF_BASE_ADDRESS
+			MAX1 = (MIN1 + CONFIG_ECAM_MMCONF_LENGTH -1)
+			LEN1 = CONFIG_ECAM_MMCONF_LENGTH
+			Return (RBUF)
+		}
 	}
 }
 #endif