[edk2-platforms][PATCH V2 3/6] Platform/Sgi: Low Power Idle states for RD-N2-Cfg1


Pranav Madhu
 

RD-N2-Cfg1 platform supports 2 LPI states, LPI1 (Standby WFI) and LPI3
(Power-down) and the cluster supports LPI2 (Power-down) state. The LPI
implementation also supports combined power state for core and cluster.

Signed-off-by: Pranav Madhu <pranav.madhu@arm.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
---
Platform/ARM/SgiPkg/AcpiTables/RdN2Cfg1/Dsdt.asl | 158 +++++++++++++++++=
+++
1 file changed, 158 insertions(+)

diff --git a/Platform/ARM/SgiPkg/AcpiTables/RdN2Cfg1/Dsdt.asl b/Platform/=
ARM/SgiPkg/AcpiTables/RdN2Cfg1/Dsdt.asl
index d68523bc43ed..55f51cc26aff 100644
--- a/Platform/ARM/SgiPkg/AcpiTables/RdN2Cfg1/Dsdt.asl
+++ b/Platform/ARM/SgiPkg/AcpiTables/RdN2Cfg1/Dsdt.asl
@@ -19,91 +19,249 @@
DefinitionBlock ("DsdtTable.aml", "DSDT", 2, "ARMLTD", "ARMSGI",
EFI_ACPI_ARM_OEM_REVISION) {
Scope (_SB) {
+ /* _OSC: Operating System Capabilities */
+ Method (_OSC, 4, Serialized) {
+ CreateDWordField (Arg3, 0x00, STS0)
+ CreateDWordField (Arg3, 0x04, CAP0)
+
+ /* Platform-wide Capabilities */
+ If (LEqual (Arg0, ToUUID("0811b06e-4a27-44f9-8d60-3cbbc22e7b48")))=
{
+ /* OSC rev 1 supported, for other version, return failure */
+ If (LEqual (Arg1, One)) {
+ And (STS0, Not (OSC_STS_MASK), STS0)
+
+ If (And (CAP0, OSC_CAP_OS_INITIATED_LPI)) {
+ /* OS initiated LPI not supported */
+ And (CAP0, Not (OSC_CAP_OS_INITIATED_LPI), CAP0)
+ Or (STS0, OSC_STS_CAPABILITY_MASKED, STS0)
+ }
+ } Else {
+ And (STS0, Not (OSC_STS_MASK), STS0)
+ Or (STS0, Or (OSC_STS_FAILURE, OSC_STS_UNRECOGNIZED_REV), STS0=
)
+ }
+ } Else {
+ And (STS0, Not (OSC_STS_MASK), STS0)
+ Or (STS0, Or (OSC_STS_FAILURE, OSC_STS_UNRECOGNIZED_UUID), STS0)
+ }
+
+ Return (Arg3)
+ }
+
+ Name (CLPI, Package () { /* LPI for Cluster, support 1 LPI state */
+ 0, // Version
+ 0, // Level Index
+ 1, // Count
+ Package () { // Power Gating state for Cluster
+ 2500, // Min residency (uS)
+ 1150, // Wake latency (uS)
+ 1, // Flags
+ 1, // Arch Context Flags
+ 100, // Residency Counter Frequency
+ 0, // No Parent State
+ 0x00000020, // Integer Entry method
+ ResourceTemplate () { // Null Residency Counter
+ Register (SystemMemory, 0, 0, 0, 0)
+ },
+ ResourceTemplate () { // Null Usage Counter
+ Register (SystemMemory, 0, 0, 0, 0)
+ },
+ "LPI2-Cluster"
+ },
+ })
+
+ Name (PLPI, Package () { /* LPI for Processor, support 2 LPI states=
*/
+ 0, // Version
+ 1, // Level Index
+ 2, // Count
+ Package () { // WFI for CPU
+ 1, // Min residency (uS)
+ 1, // Wake latency (uS)
+ 1, // Flags
+ 0, // Arch Context lost Flags (no loss)
+ 100, // Residency Counter Frequency
+ 0, // No parent state
+ ResourceTemplate () { // Register Entry method
+ Register (FFixedHW,
+ 32, // Bit Width
+ 0, // Bit Offset
+ 0xFFFFFFFF, // Address
+ 3, // Access Size
+ )
+ },
+ ResourceTemplate () { // Null Residency Counter
+ Register (SystemMemory, 0, 0, 0, 0)
+ },
+ ResourceTemplate () { // Null Usage Counter
+ Register (SystemMemory, 0, 0, 0, 0)
+ },
+ "LPI1-Core"
+ },
+ Package () { // Power Gating state for CPU
+ 150, // Min residency (uS)
+ 350, // Wake latency (uS)
+ 1, // Flags
+ 1, // Arch Context lost Flags (Core context l=
ost)
+ 100, // Residency Counter Frequency
+ 1, // Parent node can be in any shallower sta=
te
+ ResourceTemplate () { // Register Entry method
+ Register (FFixedHW,
+ 32, // Bit Width
+ 0, // Bit Offset
+ 0x40000002, // Address (PwrLvl:core, StateTyp:PwrDn)
+ 3, // Access Size
+ )
+ },
+ ResourceTemplate () { // Null Residency Counter
+ Register (SystemMemory, 0, 0, 0, 0)
+ },
+ ResourceTemplate () { // Null Usage Counter
+ Register (SystemMemory, 0, 0, 0, 0)
+ },
+ "LPI3-Core"
+ },
+ })
+
Device (CL00) { // Cluster 0
Name (_HID, "ACPI0010")
Name (_UID, 0)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.CLPI)
+ }
=20
Device (CP00) { // Neoverse N2 core 0
Name (_HID, "ACPI0007")
Name (_UID, 0)
Name (_STA, 0xF)
+
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
}
=20
Device (CL01) { // Cluster 1
Name (_HID, "ACPI0010")
Name (_UID, 1)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.CLPI)
+ }
=20
Device (CP01) { // Neoverse N2 core 1
Name (_HID, "ACPI0007")
Name (_UID, 1)
Name (_STA, 0xF)
+
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
}
=20
Device (CL02) { // Cluster 2
Name (_HID, "ACPI0010")
Name (_UID, 2)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.CLPI)
+ }
=20
Device (CP02) { // Neoverse N2 core 2
Name (_HID, "ACPI0007")
Name (_UID, 2)
Name (_STA, 0xF)
+
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
}
=20
Device (CL03) { // Cluster 3
Name (_HID, "ACPI0010")
Name (_UID, 3)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.CLPI)
+ }
=20
Device (CP03) { // Neoverse N2 core 3
Name (_HID, "ACPI0007")
Name (_UID, 3)
Name (_STA, 0xF)
+
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
}
=20
Device (CL04) { // Cluster 4
Name (_HID, "ACPI0010")
Name (_UID, 4)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.CLPI)
+ }
=20
Device (CP04) { // Neoverse N2 core 4
Name (_HID, "ACPI0007")
Name (_UID, 4)
Name (_STA, 0xF)
+
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
}
=20
Device (CL05) { // Cluster 5
Name (_HID, "ACPI0010")
Name (_UID, 5)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.CLPI)
+ }
=20
Device (CP05) { // Neoverse N2 core 5
Name (_HID, "ACPI0007")
Name (_UID, 5)
Name (_STA, 0xF)
+
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
}
=20
Device (CL06) { // Cluster 6
Name (_HID, "ACPI0010")
Name (_UID, 6)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.CLPI)
+ }
=20
Device (CP06) { // Neoverse N2 core 6
Name (_HID, "ACPI0007")
Name (_UID, 6)
Name (_STA, 0xF)
+
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
}
=20
Device (CL07) { // Cluster 7
Name (_HID, "ACPI0010")
Name (_UID, 7)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.CLPI)
+ }
=20
Device (CP07) { // Neoverse N2 core 7
Name (_HID, "ACPI0007")
Name (_UID, 7)
Name (_STA, 0xF)
+
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
}
} // Scope(_SB)
--=20
2.17.1

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