soc/intel/apollolake: Fill northbridge ASL

Northbridge resource assignment: Dynamicly update memory resources for northbridge devices, exclude any fixed MMIO resources. Change-Id: I9595f9a12434fa423862836d19f7266d6023fc5a Signed-off-by: Zhao, Lijian <lijian.zhao@intel.com> Reviewed-on: https://review.coreboot.org/13371 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
2015-12-02 15:34:45 -08:00 · 2015-12-02 15:34:45 -08:00 · e036270953
parent 3187576429
commit e036270953
1 changed files with 126 additions and 0 deletions
--- a/src/soc/intel/apollolake/acpi/northbridge.asl
+++ b/src/soc/intel/apollolake/acpi/northbridge.asl
@ -0,0 +1,126 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Intel Corp.
+ * (Written by Lance Zhao <lijian.zhao@intel.com> for Intel Corp.)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+        Name(_HID, EISAID("PNP0A08"))	/* PCIe */
+        Name(_CID, EISAID("PNP0A03"))	/* PCI */
+        Name(_ADR, 0)
+        Name(_BBN, 0)
+
+Device (MCHC)
+{
+	Name (_ADR, 0x00000000)		/*Dev0 Func0 */
+
+		OperationRegion (MCHP, PCI_Config, 0x00, 0x100)
+		Field (MCHP, DWordAcc, NoLock, Preserve)
+		{
+			Offset(0x60),
+			MCNF,	32,	/* PCI MMCONF base */
+			Offset (0xA8),
+			TUUD, 64,	/* Top of Upper Used Memory */
+			Offset(0xB4),
+			BGSM,   32,	/* Base of Graphics Stolen Memory */
+			Offset(0xBC),
+			TLUD,   32,	/* Top of Low Useable DRAM */
+		}
+	Name (MCRS, ResourceTemplate()
+	{
+		/* Bus Numbers */
+		WordBusNumber (ResourceProducer, MinFixed, MaxFixed, PosDecode,
+				0x0000, 0x0000, 0x00ff, 0x0000, 0x0100,,,)
+
+		/* IO Region 0 */
+		DWordIO (ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange,
+				0x0000, 0x0000, 0x0cf7, 0x0000, 0x0cf8,,,)
+
+		/* PCI Config Space */
+		Io (Decode16, 0x0cf8, 0x0cf8, 0x0001, 0x0008)
+
+		/* IO Region 1 */
+		DWordIO (ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange,
+				0x0000, 0x01000, 0xffff, 0x0000, 0xf000,,,)
+
+		/* VGA memory (0xa0000-0xbffff) */
+		DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
+				Cacheable, ReadWrite,
+				0x00000000, 0x000a0000, 0x000bffff, 0x00000000,
+				0x00020000,,,)
+
+		/* Data and GFX stolen memory */
+		DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
+				Cacheable, ReadWrite,
+				0x00000000, 0x3be00000, 0x3fffffff, 0x00000000,
+				0x04200000,,, STOM)
+
+		/*
+		 * PCI MMIO Region (TOLUD - PCI extended base MMCONF)
+		 * This assumes that MMCONF is placed after PCI config space,
+		 * and that no resources are allocated after the MMCONF region.
+		 * This works, sicne MMCONF is hardcoded to 0xe00000000.
+		 */
+		DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
+				NonCacheable, ReadWrite,
+				0x00000000, 0x00000000, 0x00000000, 0x00000000,
+				0x00000000,,, PM01)
+
+		/* PCI Memory Region (TOUUD - (TOUUD + ABOVE_4G_MMIO_SIZE)) */
+		QWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
+				NonCacheable, ReadWrite,
+				0x00000000, 0x10000, 0x1ffff, 0x00000000,
+				0x10000,,, PM02)
+})
+
+/* Current Resource Settings */
+Method (_CRS, 0, Serialized)
+{
+
+	/* Find PCI resource area in MCRS */
+	CreateDwordField (MCRS, ^PM01._MIN, PMIN)
+	CreateDwordField (MCRS, ^PM01._MAX, PMAX)
+	CreateDwordField (MCRS, ^PM01._LEN, PLEN)
+
+	/* Read C-Unit PCI CFG Reg. 0xBC for TOLUD (shadow from B-Unit) */
+	And(^MCHC.TLUD, 0xFFF00000, PMIN)
+	/* Read MMCONF base */
+	And(^MCHC.MCNF, 0xF0000000, PMAX)
+
+	/* Calculate PCI MMIO Length */
+	Add(Subtract(PMAX, PMIN), 1, PLEN)
+
+	/* Find GFX resource area in GCRS */
+	CreateDwordField(MCRS, ^STOM._MIN, GMIN)
+	CreateDwordField(MCRS, ^STOM._MAX, GMAX)
+	CreateDwordField(MCRS, ^STOM._LEN, GLEN)
+
+	/* Read BGSM */
+	And(^MCHC.BGSM, 0xFFF00000, GMIN)
+
+	/* Read TOLUD */
+	And(^MCHC.TLUD, 0xFFF00000, GMAX)
+	Decrement(GMAX)
+	Add(Subtract(GMAX, GMIN), 1, GLEN)
+
+	/* Patch PM02 range based on Memory Size */
+	CreateQwordField (MCRS, ^PM02._MIN, MMIN)
+	CreateQwordField (MCRS, ^PM02._MAX, MMAX)
+	CreateQwordField (MCRS, ^PM02._LEN, MLEN)
+
+	Store (^MCHC.TUUD, Local0)
+
+	If (LLessEqual (Local0, 0x1000000000)) {
+		Store (0, MMIN)
+		Store (0, MLEN)
+	}
+	Subtract (Add (MMIN, MLEN), 1, MMAX)
+
+	Return (MCRS)
+}
+}