[edk2-devel] [edk2-platforms][PATCH V1 07/17] Platform/Sgi: Low Power Idle States for RD-N1-Edge dual-chip
Pranav Madhu
pranav.madhu at arm.com
Wed Apr 28 12:35:50 UTC 2021
RD-N1-Edge platform in multi chip configuration supports 2 LPI states,
LPI1 (Standby WFI) and LPI3 (Power-down). 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 at arm.com>
---
Platform/ARM/SgiPkg/AcpiTables/RdN1EdgeX2/Dsdt.asl | 162 ++++++++++++++++++++
1 file changed, 162 insertions(+)
diff --git a/Platform/ARM/SgiPkg/AcpiTables/RdN1EdgeX2/Dsdt.asl b/Platform/ARM/SgiPkg/AcpiTables/RdN1EdgeX2/Dsdt.asl
index 2379f20a79ef..5807658e7815 100644
--- a/Platform/ARM/SgiPkg/AcpiTables/RdN1EdgeX2/Dsdt.asl
+++ b/Platform/ARM/SgiPkg/AcpiTables/RdN1EdgeX2/Dsdt.asl
@@ -15,62 +15,194 @@
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 lost)
+ 100, // Residency Counter Frequency
+ 1, // Parent node can be in any shallower state
+ 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"
+ },
+ })
+
/* Chip 0 CPUs */
Device (CLU0) { // Cluster 0
Name (_HID, "ACPI0010")
Name (_UID, 0)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.CLPI)
+ }
Device (CP00) { // Neoverse-N1: Cluster 0, Cpu 0
Name (_HID, "ACPI0007")
Name (_UID, 0)
Name (_STA, 0xF)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
Device (CP01) { // Neoverse-N1: Cluster 0, Cpu 1
Name (_HID, "ACPI0007")
Name (_UID, 1)
Name (_STA, 0xF)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
Device (CP02) { // Neoverse-N1: Cluster 0, Cpu 2
Name (_HID, "ACPI0007")
Name (_UID, 2)
Name (_STA, 0xF)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
Device (CP03) { // Neoverse-N1: Cluster 0, Cpu 3
Name (_HID, "ACPI0007")
Name (_UID, 3)
Name (_STA, 0xF)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
}
Device (CLU1) { // Cluster 1
Name (_HID, "ACPI0010")
Name (_UID, 1)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.CLPI)
+ }
Device (CP04) { // Neoverse-N1: Cluster 1, Cpu 0
Name (_HID, "ACPI0007")
Name (_UID, 4)
Name (_STA, 0xF)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
Device (CP05) { // Neoverse-N1: Cluster 1, Cpu 1
Name (_HID, "ACPI0007")
Name (_UID, 5)
Name (_STA, 0xF)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
Device (CP06) { // Neoverse-N1: Cluster 1, Cpu 2
Name (_HID, "ACPI0007")
Name (_UID, 6)
Name (_STA, 0xF)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
Device (CP07) { // Neoverse-N1: Cluster 1, Cpu 3
Name (_HID, "ACPI0007")
Name (_UID, 7)
Name (_STA, 0xF)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
}
@@ -78,58 +210,88 @@ DefinitionBlock ("DsdtTable.aml", "DSDT", 2, "ARMLTD", "ARMSGI",
Device (CLU2) { // Cluster 2
Name (_HID, "ACPI0010")
Name (_UID, 2)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.CLPI)
+ }
Device (CP08) { // Neoverse-N1: Cluster 2, Cpu 0
Name (_HID, "ACPI0007")
Name (_UID, 8)
Name (_STA, 0xF)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
Device (CP09) { // Neoverse-N1: Cluster 2, Cpu 1
Name (_HID, "ACPI0007")
Name (_UID, 9)
Name (_STA, 0xF)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
Device (CP10) { // Neoverse-N1: Cluster 2, Cpu 2
Name (_HID, "ACPI0007")
Name (_UID, 10)
Name (_STA, 0xF)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
Device (CP11) { // Neoverse-N1: Cluster 2, Cpu 3
Name (_HID, "ACPI0007")
Name (_UID, 11)
Name (_STA, 0xF)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
}
Device (CLU3) { // Cluster 3
Name (_HID, "ACPI0010")
Name (_UID, 3)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.CLPI)
+ }
Device (CP12) { // Neoverse-N1: Cluster 3, Cpu 0
Name (_HID, "ACPI0007")
Name (_UID, 12)
Name (_STA, 0xF)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
Device (CP13) { // Neoverse-N1: Cluster 3, Cpu 1
Name (_HID, "ACPI0007")
Name (_UID, 13)
Name (_STA, 0xF)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
Device (CP14) { // Neoverse-N1: Cluster 3, Cpu 2
Name (_HID, "ACPI0007")
Name (_UID, 14)
Name (_STA, 0xF)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
Device (CP15) { // Neoverse-N1: Cluster 3, Cpu 3
Name (_HID, "ACPI0007")
Name (_UID, 15)
Name (_STA, 0xF)
+ Method (_LPI, 0, NotSerialized) {
+ Return (\_SB.PLPI)
+ }
}
}
} // Scope(_SB)
--
2.17.1
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