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authorDuncan Laurie <dlaurie@chromium.org>2013-06-28 16:01:53 -0700
committerAlexandru Gagniuc <mr.nuke.me@gmail.com>2013-12-07 03:33:10 +0100
commitb17117904d1c233bc0798022f17b4ef38393fffc (patch)
tree6055a12f67f5c957d0e582e0c7669ae787e2d5f6 /src/northbridge
parentc70353f1eb26b9239ba7704111c9b471463ce42e (diff)
downloadcoreboot-b17117904d1c233bc0798022f17b4ef38393fffc.tar.xz
haswell: Add ACPI support for Controllable TDP
Add ACPI Methods to enable and disable power limiting with PL1. This can be used in ACPI Thermal Zone or in EC ACPI _QXX events. This commit adds new unused methods and is fully tested with the subsequent commit that makes use of these methods. Change-Id: I9d8d23bfe9cf7c756ff8ab0412e5a010826b12db Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/60546 Reviewed-on: http://review.coreboot.org/4334 Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/northbridge')
-rw-r--r--src/northbridge/intel/haswell/acpi/hostbridge.asl116
1 files changed, 99 insertions, 17 deletions
diff --git a/src/northbridge/intel/haswell/acpi/hostbridge.asl b/src/northbridge/intel/haswell/acpi/hostbridge.asl
index 681f6dc1fd..30ee3e548e 100644
--- a/src/northbridge/intel/haswell/acpi/hostbridge.asl
+++ b/src/northbridge/intel/haswell/acpi/hostbridge.asl
@@ -106,35 +106,45 @@ Device (MCHC)
Name (CTCN, 0) /* CTDP Nominal Select */
Name (CTCD, 1) /* CTDP Down Select */
Name (CTCU, 2) /* CTDP Up Select */
+ Name (SPL1, 0) /* Saved PL1 value */
- OperationRegion (MCHB, SystemMemory, DEFAULT_MCHBAR, 0x8000)
+ OperationRegion (MCHB, SystemMemory, Add(DEFAULT_MCHBAR,0x5000), 0x1000)
Field (MCHB, DWordAcc, Lock, Preserve)
{
- Offset (0x5930),
+ Offset (0x930), /* PACKAGE_POWER_SKU */
CTDN, 15, /* CTDP Nominal PL1 */
- Offset (0x59a0),
+ Offset (0x938), /* PACKAGE_POWER_SKU_UNIT */
+ PUNI, 4, /* Power Units */
+ , 4,
+ EUNI, 5, /* Energy Units */
+ , 3,
+ TUNI, 4, /* Time Units */
+ Offset (0x958), /* PLATFORM_INFO */
+ , 40,
+ LFM_, 8, /* Maximum Efficiency Ratio (LFM) */
+ Offset (0x9a0), /* TURBO_POWER_LIMIT1 */
PL1V, 15, /* Power Limit 1 Value */
PL1E, 1, /* Power Limit 1 Enable */
PL1C, 1, /* Power Limit 1 Clamp */
PL1T, 7, /* Power Limit 1 Time */
- Offset (0x59a4),
+ Offset (0x9a4), /* TURBO_POWER_LIMIT2 */
PL2V, 15, /* Power Limit 2 Value */
PL2E, 1, /* Power Limit 2 Enable */
PL2C, 1, /* Power Limit 2 Clamp */
PL2T, 7, /* Power Limit 2 Time */
- Offset (0x5f3c),
+ Offset (0xf3c), /* CONFIG_TDP_NOMINAL */
TARN, 8, /* CTDP Nominal Turbo Activation Ratio */
- Offset (0x5f40),
+ Offset (0xf40), /* CONFIG_TDP_LEVEL1 */
CTDD, 15, /* CTDP Down PL1 */
- , 1,
+ , 1,
TARD, 8, /* CTDP Down Turbo Activation Ratio */
- Offset (0x5f48),
+ Offset (0xf48), /* MSR_CONFIG_TDP_LEVEL2 */
CTDU, 15, /* CTDP Up PL1 */
- , 1,
+ , 1,
TARU, 8, /* CTDP Up Turbo Activation Ratio */
- Offset (0x5f50),
+ Offset (0xf50), /* CONFIG_TDP_CONTROL */
CTCS, 2, /* CTDP Select */
- Offset (0x5f54),
+ Offset (0xf54), /* TURBO_ACTIVATION_RATIO */
TARS, 8, /* Turbo Activation Ratio Select */
}
@@ -166,7 +176,19 @@ Device (MCHC)
Return (0)
}
- /* Set TDP Down */
+ /* Calculate PL2 based on chip type */
+ Method (CPL2, 1, NotSerialized)
+ {
+ If (\ISLP ()) {
+ /* Haswell ULT PL2 = 25W */
+ Return (Multiply (25, 8))
+ } Else {
+ /* Haswell Mobile PL2 = 1.25 * PL1 */
+ Return (Divide (Multiply (Arg0, 125), 100))
+ }
+ }
+
+ /* Set Config TDP Down */
Method (STND, 0, Serialized)
{
If (Acquire (CTCM, 100)) {
@@ -189,8 +211,8 @@ Device (MCHC)
Store (PSSS (TARD), PPCM)
PPCN ()
- /* Set PL2 to 1.25 * PL1 */
- Divide (Multiply (CTDD, 125), 100, Local0, PL2V)
+ /* Set PL2 */
+ Store (CPL2 (CTDD), PL2V)
/* Set PL1 */
Store (CTDD, PL1V)
@@ -202,7 +224,7 @@ Device (MCHC)
Return (1)
}
- /* Set TDP Nominal from Down */
+ /* Set Config TDP Nominal from Down */
Method (STDN, 0, Serialized)
{
If (Acquire (CTCM, 100)) {
@@ -218,8 +240,8 @@ Device (MCHC)
/* Set PL1 */
Store (CTDN, PL1V)
- /* Set PL2 to 1.25 * PL1 */
- Divide (Multiply (CTDN, 125), 100, Local0, PL2V)
+ /* Set PL2 */
+ Store (CPL2 (CTDN), PL2V)
/* Set PPC limit and notify OS */
Store (PSSS (TARN), PPCM)
@@ -237,6 +259,66 @@ Device (MCHC)
Release (CTCM)
Return (1)
}
+
+ /* Calculate PL1 value based on requested TDP */
+ Method (TDPP, 1, NotSerialized)
+ {
+ Return (Multiply (ShiftLeft (Subtract (PUNI, 1), 2), Arg0))
+ }
+
+ /* Enable Controllable TDP to limit PL1 to requested value */
+ Method (CTLE, 1, Serialized)
+ {
+ If (Acquire (CTCM, 100)) {
+ Return (0)
+ }
+
+ Store ("Enable PL1 Limit", Debug)
+
+ /* Set _PPC to LFM */
+ Store (PSSS (LFM_), Local0)
+ Add (Local0, 1, PPCM)
+ \PPCN ()
+
+ /* Set TAR to LFM-1 */
+ Subtract (LFM_, 1, TARS)
+
+ /* Set PL1 to desired value */
+ Store (PL1V, SPL1)
+ Store (TDPP (Arg0), PL1V)
+
+ /* Set PL1 CLAMP bit */
+ Store (One, PL1C)
+
+ Release (CTCM)
+ Return (1)
+ }
+
+ /* Disable Controllable TDP */
+ Method (CTLD, 0, Serialized)
+ {
+ If (Acquire (CTCM, 100)) {
+ Return (0)
+ }
+
+ Store ("Disable PL1 Limit", Debug)
+
+ /* Clear PL1 CLAMP bit */
+ Store (Zero, PL1C)
+
+ /* Set PL1 to normal value */
+ Store (SPL1, PL1V)
+
+ /* Set TAR to 0 */
+ Store (Zero, TARS)
+
+ /* Set _PPC to 0 */
+ Store (Zero, PPCM)
+ \PPCN ()
+
+ Release (CTCM)
+ Return (1)
+ }
}
// Current Resource Settings