Since XP only implements parts of ACPI 2.0, it chokes on the TOM2 qword in the SSDT, which is present if a board uses k8acpi_write_vars.
With the acpigen_write_name_qword("TOM2"... in place I get a Stop A5 (0x11, 0x8, <virtual address of SSDT>, <somevalue>) bluescreen on boot.
This patch replaces the qword with a dword, which contains (TOM2 >> 20), giving us 1MB granularity and a limit of almost 4Exabyte of memory. I added corresponding ShiftLeft calls in the commented out dsdt sections that would use TOM2 if they were not commented out.
This problem was introduced with http://tracker.coreboot.org/trac/coreboot/changeset/3953
Note that all corresponding DSDTs currently only ever check TOM2 against 0.
Signed-off-by: Tobias Diedrich ranma+coreboot@tdiedrich.de
---
Index: src/northbridge/amd/amdk8/amdk8_acpi.c =================================================================== --- src/northbridge/amd/amdk8/amdk8_acpi.c.orig 2010-11-03 23:19:03.000000000 +0100 +++ src/northbridge/amd/amdk8/amdk8_acpi.c 2010-11-03 23:19:37.000000000 +0100 @@ -270,7 +270,15 @@ msr = rdmsr(TOP_MEM); lens += acpigen_write_name_dword("TOM1", msr.lo); msr = rdmsr(TOP_MEM2); - lens += acpigen_write_name_qword("TOM2", (((uint64_t) msr.hi) << 32) | msr.lo); + /* + * Since XP only implements parts of ACPI 2.0, we can't use a qword + * here. + * See http://www.acpi.info/presentations/S01USMOBS169_OS%2520new.ppt + * slide 22ff. + * Shift value right by 20 bit to make it fit into 32bit, + * giving us 1MB granularity and a limit of almost 4Exabyte of memory. + */ + lens += acpigen_write_name_dword("TOM2", (msr.hi << 12) | msr.lo >> 20);
lens += k8acpi_write_HT(); //minus opcode Index: src/mainboard/gigabyte/ma78gm/dsdt.asl =================================================================== --- src/mainboard/gigabyte/ma78gm/dsdt.asl.orig 2010-11-03 23:19:03.000000000 +0100 +++ src/mainboard/gigabyte/ma78gm/dsdt.asl 2010-11-03 23:19:37.000000000 +0100 @@ -1168,7 +1168,7 @@ /* Note: Only need HID on Primary Bus */ Device(PCI0) { External (TOM1) - External (TOM2) + External (TOM2) /* (<real tom2> >> 20) to make it fit into 32 bit for XP */ Name(_HID, EISAID("PNP0A03")) Name(_ADR, 0x00180000) /* Dev# = BSP Dev#, Func# = 0 */ Method(_BBN, 0) { /* Bus number = 0 */ @@ -1614,7 +1614,8 @@ /* * If(LNotEqual(TOM2, 0x00000000)){ * Store(0x100000000,DMHB) DRAM from 4GB to TopMem2 - * Subtract(TOM2, 0x100000000, DMHL) + * ShiftLeft(TOM2, 20, Local0) + * Subtract(Local0, 0x100000000, DMHL) * } */
Index: src/mainboard/asrock/939a785gmh/dsdt.asl =================================================================== --- src/mainboard/asrock/939a785gmh/dsdt.asl.orig 2010-11-03 23:19:28.000000000 +0100 +++ src/mainboard/asrock/939a785gmh/dsdt.asl 2010-11-03 23:19:37.000000000 +0100 @@ -1122,7 +1122,7 @@ /* Note: Only need HID on Primary Bus */ Device(PCI0) { External (TOM1) - External (TOM2) + External (TOM2) /* (<real tom2> >> 20) to make it fit into 32 bit for XP */ Name(_HID, EISAID("PNP0A03")) Name(_ADR, 0x00180000) /* Dev# = BSP Dev#, Func# = 0 */ Method(_BBN, 0) { /* Bus number = 0 */ @@ -1530,7 +1530,8 @@ /* * If(LNotEqual(TOM2, 0x00000000)){ * Store(0x100000000,DMHB) DRAM from 4GB to TopMem2 - * Subtract(TOM2, 0x100000000, DMHL) + * ShiftLeft(TOM2, 20, Local0) + * Subtract(Local0, 0x100000000, DMHL) * } */
Index: src/mainboard/kontron/kt690/dsdt.asl =================================================================== --- src/mainboard/kontron/kt690/dsdt.asl.orig 2010-11-03 23:19:28.000000000 +0100 +++ src/mainboard/kontron/kt690/dsdt.asl 2010-11-03 23:19:37.000000000 +0100 @@ -1129,7 +1129,7 @@ /* Note: Only need HID on Primary Bus */ Device(PCI0) { External (TOM1) - External (TOM2) + External (TOM2) /* (<real tom2> >> 20) to make it fit into 32 bit for XP */ Name(_HID, EISAID("PNP0A03")) Name(_ADR, 0x00180000) /* Dev# = BSP Dev#, Func# = 0 */ Method(_BBN, 0) { /* Bus number = 0 */ @@ -1557,7 +1557,8 @@ /* * If(LNotEqual(TOM2, 0x00000000)){ * Store(0x100000000,DMHB) DRAM from 4GB to TopMem2 - * Subtract(TOM2, 0x100000000, DMHL) + * ShiftLeft(TOM2, 20, Local0) + * Subtract(Local0, 0x100000000, DMHL) * } */
Index: src/mainboard/gigabyte/ma785gmt/dsdt.asl =================================================================== --- src/mainboard/gigabyte/ma785gmt/dsdt.asl.orig 2010-11-03 23:19:28.000000000 +0100 +++ src/mainboard/gigabyte/ma785gmt/dsdt.asl 2010-11-03 23:19:37.000000000 +0100 @@ -1168,7 +1168,7 @@ /* Note: Only need HID on Primary Bus */ Device(PCI0) { External (TOM1) - External (TOM2) + External (TOM2) /* (<real tom2> >> 20) to make it fit into 32 bit for XP */ Name(_HID, EISAID("PNP0A03")) Name(_ADR, 0x00180000) /* Dev# = BSP Dev#, Func# = 0 */ Method(_BBN, 0) { /* Bus number = 0 */ @@ -1614,7 +1614,8 @@ /* * If(LNotEqual(TOM2, 0x00000000)){ * Store(0x100000000,DMHB) DRAM from 4GB to TopMem2 - * Subtract(TOM2, 0x100000000, DMHL) + * ShiftLeft(TOM2, 20, Local0) + * Subtract(Local0, 0x100000000, DMHL) * } */
Index: src/mainboard/amd/mahogany/dsdt.asl =================================================================== --- src/mainboard/amd/mahogany/dsdt.asl.orig 2010-11-03 23:19:28.000000000 +0100 +++ src/mainboard/amd/mahogany/dsdt.asl 2010-11-03 23:19:37.000000000 +0100 @@ -1126,7 +1126,7 @@ /* Note: Only need HID on Primary Bus */ Device(PCI0) { External (TOM1) - External (TOM2) + External (TOM2) /* (<real tom2> >> 20) to make it fit into 32 bit for XP */ Name(_HID, EISAID("PNP0A03")) Name(_ADR, 0x00180000) /* Dev# = BSP Dev#, Func# = 0 */ Method(_BBN, 0) { /* Bus number = 0 */ @@ -1572,7 +1572,8 @@ /* * If(LNotEqual(TOM2, 0x00000000)){ * Store(0x100000000,DMHB) DRAM from 4GB to TopMem2 - * Subtract(TOM2, 0x100000000, DMHL) + * ShiftLeft(TOM2, 20, Local0) + * Subtract(Local0, 0x100000000, DMHL) * } */
Index: src/mainboard/amd/pistachio/dsdt.asl =================================================================== --- src/mainboard/amd/pistachio/dsdt.asl.orig 2010-11-03 23:19:28.000000000 +0100 +++ src/mainboard/amd/pistachio/dsdt.asl 2010-11-03 23:19:37.000000000 +0100 @@ -1128,7 +1128,7 @@ /* Note: Only need HID on Primary Bus */ Device(PCI0) { External (TOM1) - External (TOM2) + External (TOM2) /* (<real tom2> >> 20) to make it fit into 32 bit for XP */ Name(_HID, EISAID("PNP0A03")) Name(_ADR, 0x00180000) /* Dev# = BSP Dev#, Func# = 0 */ Method(_BBN, 0) { /* Bus number = 0 */ @@ -1480,7 +1480,8 @@ /* * If(LNotEqual(TOM2, 0x00000000)){ * Store(0x100000000,DMHB) DRAM from 4GB to TopMem2 - * Subtract(TOM2, 0x100000000, DMHL) + * ShiftLeft(TOM2, 20, Local0) + * Subtract(Local0, 0x100000000, DMHL) * } */
Index: src/mainboard/amd/dbm690t/dsdt.asl =================================================================== --- src/mainboard/amd/dbm690t/dsdt.asl.orig 2010-11-03 23:19:28.000000000 +0100 +++ src/mainboard/amd/dbm690t/dsdt.asl 2010-11-03 23:19:37.000000000 +0100 @@ -1129,7 +1129,7 @@ /* Note: Only need HID on Primary Bus */ Device(PCI0) { External (TOM1) - External (TOM2) + External (TOM2) /* (<real tom2> >> 20) to make it fit into 32 bit for XP */ Name(_HID, EISAID("PNP0A03")) Name(_ADR, 0x00180000) /* Dev# = BSP Dev#, Func# = 0 */ Method(_BBN, 0) { /* Bus number = 0 */ @@ -1557,7 +1557,8 @@ /* * If(LNotEqual(TOM2, 0x00000000)){ * Store(0x100000000,DMHB) DRAM from 4GB to TopMem2 - * Subtract(TOM2, 0x100000000, DMHL) + * ShiftLeft(TOM2, 20, Local0) + * Subtract(Local0, 0x100000000, DMHL) * } */
Index: src/mainboard/amd/mahogany_fam10/dsdt.asl =================================================================== --- src/mainboard/amd/mahogany_fam10/dsdt.asl.orig 2010-11-03 23:19:28.000000000 +0100 +++ src/mainboard/amd/mahogany_fam10/dsdt.asl 2010-11-03 23:19:37.000000000 +0100 @@ -1168,7 +1168,7 @@ /* Note: Only need HID on Primary Bus */ Device(PCI0) { External (TOM1) - External (TOM2) + External (TOM2) /* (<real tom2> >> 20) to make it fit into 32 bit for XP */ Name(_HID, EISAID("PNP0A03")) Name(_ADR, 0x00180000) /* Dev# = BSP Dev#, Func# = 0 */ Method(_BBN, 0) { /* Bus number = 0 */ @@ -1614,7 +1614,8 @@ /* * If(LNotEqual(TOM2, 0x00000000)){ * Store(0x100000000,DMHB) DRAM from 4GB to TopMem2 - * Subtract(TOM2, 0x100000000, DMHL) + * ShiftLeft(TOM2, 20, Local0) + * Subtract(Local0, 0x100000000, DMHL) * } */
Index: src/mainboard/amd/tilapia_fam10/dsdt.asl =================================================================== --- src/mainboard/amd/tilapia_fam10/dsdt.asl.orig 2010-11-03 23:19:28.000000000 +0100 +++ src/mainboard/amd/tilapia_fam10/dsdt.asl 2010-11-03 23:19:37.000000000 +0100 @@ -1168,7 +1168,7 @@ /* Note: Only need HID on Primary Bus */ Device(PCI0) { External (TOM1) - External (TOM2) + External (TOM2) /* (<real tom2> >> 20) to make it fit into 32 bit for XP */ Name(_HID, EISAID("PNP0A03")) Name(_ADR, 0x00180000) /* Dev# = BSP Dev#, Func# = 0 */ Method(_BBN, 0) { /* Bus number = 0 */ @@ -1614,7 +1614,8 @@ /* * If(LNotEqual(TOM2, 0x00000000)){ * Store(0x100000000,DMHB) DRAM from 4GB to TopMem2 - * Subtract(TOM2, 0x100000000, DMHL) + * ShiftLeft(TOM2, 20, Local0) + * Subtract(Local0, 0x100000000, DMHL) * } */
Index: src/mainboard/iei/kino-780am2-fam10/dsdt.asl =================================================================== --- src/mainboard/iei/kino-780am2-fam10/dsdt.asl.orig 2010-11-03 23:19:28.000000000 +0100 +++ src/mainboard/iei/kino-780am2-fam10/dsdt.asl 2010-11-03 23:19:37.000000000 +0100 @@ -1168,7 +1168,7 @@ /* Note: Only need HID on Primary Bus */ Device(PCI0) { External (TOM1) - External (TOM2) + External (TOM2) /* (<real tom2> >> 20) to make it fit into 32 bit for XP */ Name(_HID, EISAID("PNP0A03")) Name(_ADR, 0x00180000) /* Dev# = BSP Dev#, Func# = 0 */ Method(_BBN, 0) { /* Bus number = 0 */ @@ -1614,7 +1614,8 @@ /* * If(LNotEqual(TOM2, 0x00000000)){ * Store(0x100000000,DMHB) DRAM from 4GB to TopMem2 - * Subtract(TOM2, 0x100000000, DMHL) + * ShiftLeft(TOM2, 20, Local0) + * Subtract(Local0, 0x100000000, DMHL) * } */
Index: src/mainboard/jetway/pa78vm5/dsdt.asl =================================================================== --- src/mainboard/jetway/pa78vm5/dsdt.asl.orig 2010-11-03 23:19:28.000000000 +0100 +++ src/mainboard/jetway/pa78vm5/dsdt.asl 2010-11-03 23:19:37.000000000 +0100 @@ -1168,7 +1168,7 @@ /* Note: Only need HID on Primary Bus */ Device(PCI0) { External (TOM1) - External (TOM2) + External (TOM2) /* (<real tom2> >> 20) to make it fit into 32 bit for XP */ Name(_HID, EISAID("PNP0A03")) Name(_ADR, 0x00180000) /* Dev# = BSP Dev#, Func# = 0 */ Method(_BBN, 0) { /* Bus number = 0 */ @@ -1614,7 +1614,8 @@ /* * If(LNotEqual(TOM2, 0x00000000)){ * Store(0x100000000,DMHB) DRAM from 4GB to TopMem2 - * Subtract(TOM2, 0x100000000, DMHL) + * ShiftLeft(TOM2, 20, Local0) + * Subtract(Local0, 0x100000000, DMHL) * } */
Index: src/mainboard/technexion/tim8690/dsdt.asl =================================================================== --- src/mainboard/technexion/tim8690/dsdt.asl.orig 2010-11-03 23:19:28.000000000 +0100 +++ src/mainboard/technexion/tim8690/dsdt.asl 2010-11-03 23:19:37.000000000 +0100 @@ -1129,7 +1129,7 @@ /* Note: Only need HID on Primary Bus */ Device(PCI0) { External (TOM1) - External (TOM2) + External (TOM2) /* (<real tom2> >> 20) to make it fit into 32 bit for XP */ Name(_HID, EISAID("PNP0A03")) Name(_ADR, 0x00180000) /* Dev# = BSP Dev#, Func# = 0 */ Method(_BBN, 0) { /* Bus number = 0 */ @@ -1557,7 +1557,8 @@ /* * If(LNotEqual(TOM2, 0x00000000)){ * Store(0x100000000,DMHB) DRAM from 4GB to TopMem2 - * Subtract(TOM2, 0x100000000, DMHL) + * ShiftLeft(TOM2, 20, Local0) + * Subtract(Local0, 0x100000000, DMHL) * } */
Index: src/mainboard/technexion/tim5690/dsdt.asl =================================================================== --- src/mainboard/technexion/tim5690/dsdt.asl.orig 2010-11-03 23:19:29.000000000 +0100 +++ src/mainboard/technexion/tim5690/dsdt.asl 2010-11-03 23:19:37.000000000 +0100 @@ -1129,7 +1129,7 @@ /* Note: Only need HID on Primary Bus */ Device(PCI0) { External (TOM1) - External (TOM2) + External (TOM2) /* (<real tom2> >> 20) to make it fit into 32 bit for XP */ Name(_HID, EISAID("PNP0A03")) Name(_ADR, 0x00180000) /* Dev# = BSP Dev#, Func# = 0 */ Method(_BBN, 0) { /* Bus number = 0 */ @@ -1557,7 +1557,8 @@ /* * If(LNotEqual(TOM2, 0x00000000)){ * Store(0x100000000,DMHB) DRAM from 4GB to TopMem2 - * Subtract(TOM2, 0x100000000, DMHL) + * ShiftLeft(TOM2, 20, Local0) + * Subtract(Local0, 0x100000000, DMHL) * } */
Index: src/mainboard/asus/m4a785-m/dsdt.asl =================================================================== --- src/mainboard/asus/m4a785-m/dsdt.asl.orig 2010-11-03 23:19:29.000000000 +0100 +++ src/mainboard/asus/m4a785-m/dsdt.asl 2010-11-03 23:19:37.000000000 +0100 @@ -1168,7 +1168,7 @@ /* Note: Only need HID on Primary Bus */ Device(PCI0) { External (TOM1) - External (TOM2) + External (TOM2) /* (<real tom2> >> 20) to make it fit into 32 bit for XP */ Name(_HID, EISAID("PNP0A03")) Name(_ADR, 0x00180000) /* Dev# = BSP Dev#, Func# = 0 */ Method(_BBN, 0) { /* Bus number = 0 */ @@ -1614,7 +1614,8 @@ /* * If(LNotEqual(TOM2, 0x00000000)){ * Store(0x100000000,DMHB) DRAM from 4GB to TopMem2 - * Subtract(TOM2, 0x100000000, DMHL) + * ShiftLeft(TOM2, 20, Local0) + * Subtract(Local0, 0x100000000, DMHL) * } */