New patch to review for coreboot: b69c7c9 ACPI: Add a method to notify OS to re-read _PPC

[Stefan Reinauer]

Stefan Reinauer ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/1342

-gerrit

commit b69c7c9ecf211352131ab37172cf7e9ebddc9af3
Author: Duncan Laurie 
Date:   Mon Jul 16 12:14:49 2012 -0700

ACPI: Add a method to notify OS to re-read _PPC

Split this behavior out from PNOT() so the OS can
    update _PPC limit without re-reading C-state tables.

Change-Id: I81b9111a4866f6b9916f74ac57a3caefaa77c565
    Signed-off-by: Duncan Laurie 
---
 src/cpu/intel/model_206ax/acpi/cpu.asl |   27 +++++++++++++++++++--------
 1 files changed, 19 insertions(+), 8 deletions(-)

diff --git a/src/cpu/intel/model_206ax/acpi/cpu.asl b/src/cpu/intel/model_206ax/acpi/cpu.asl
index a9d5eeb..558a9d3 100644
--- a/src/cpu/intel/model_206ax/acpi/cpu.asl
+++ b/src/cpu/intel/model_206ax/acpi/cpu.asl
@@ -33,29 +33,40 @@ External (_PR.CPU7, DeviceObj)
 Method (PNOT)
 {
    If (LGreaterEqual (\PCNT, 2)) {
-		Notify (_PR.CPU0, 0x80)  // _PPC
    	Notify (_PR.CPU0, 0x81)  // _CST
-		Notify (_PR.CPU1, 0x80)  // _PPC
    	Notify (_PR.CPU1, 0x81)  // _CST
    }
    If (LGreaterEqual (\PCNT, 4)) {
-		Notify (_PR.CPU2, 0x80)  // _PPC
    	Notify (_PR.CPU2, 0x81)  // _CST
-		Notify (_PR.CPU3, 0x80)  // _PPC
    	Notify (_PR.CPU3, 0x81)  // _CST
    }
    If (LGreaterEqual (\PCNT, 8)) {
-		Notify (_PR.CPU4, 0x80)  // _PPC
    	Notify (_PR.CPU4, 0x81)  // _CST
-		Notify (_PR.CPU5, 0x80)  // _PPC
    	Notify (_PR.CPU5, 0x81)  // _CST
-		Notify (_PR.CPU6, 0x80)  // _PPC
    	Notify (_PR.CPU6, 0x81)  // _CST
-		Notify (_PR.CPU7, 0x80)  // _PPC
    	Notify (_PR.CPU7, 0x81)  // _CST
    }
 }

+/* Notify OS to re-read CPU _PPC limit, assuming ^2 CPU count */
+Method (PPCN)
+{
+	If (LGreaterEqual (\PCNT, 2)) {
+		Notify (_PR.CPU0, 0x80)  // _PPC
+		Notify (_PR.CPU1, 0x80)  // _PPC
+	}
+	If (LGreaterEqual (\PCNT, 4)) {
+		Notify (_PR.CPU2, 0x80)  // _PPC
+		Notify (_PR.CPU3, 0x80)  // _PPC
+	}
+	If (LGreaterEqual (\PCNT, 8)) {
+		Notify (_PR.CPU4, 0x80)  // _PPC
+		Notify (_PR.CPU5, 0x80)  // _PPC
+		Notify (_PR.CPU6, 0x80)  // _PPC
+		Notify (_PR.CPU7, 0x80)  // _PPC
+	}
+}
+
 /* Notify OS to re-read Throttle Limit tables, assuming ^2 CPU count */
 Method (TNOT)
 {