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-rw-r--r--src/soc/intel/apollolake/acpi/northbridge.asl126
1 files changed, 126 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/acpi/northbridge.asl b/src/soc/intel/apollolake/acpi/northbridge.asl
new file mode 100644
index 0000000000..1349c6aad2
--- /dev/null
+++ 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)
+}
+} \ No newline at end of file