[edk2-devel] [edk2-platforms][PATCH V1 3/6] Platform/Sgi: Low Power Idle states for RD-N2-Cfg1
Sami Mujawar
sami.mujawar at arm.com
Mon May 24 14:13:59 UTC 2021
Hi Pranav,
This patch looks good to me.
Reviewed-by: Sami Mujawar <sami.mujawar at arm.com>
Regards,
Sami Mujawar
On 19/05/2021 09:22 AM, Pranav Madhu wrote:
> 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 at 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 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"
> + },
> + })
> +
> Device (CL00) { // Cluster 0
> Name (_HID, "ACPI0010")
> Name (_UID, 0)
> + Method (_LPI, 0, NotSerialized) {
> + Return (\_SB.CLPI)
> + }
>
> Device (CP00) { // Neoverse N2 core 0
> Name (_HID, "ACPI0007")
> Name (_UID, 0)
> Name (_STA, 0xF)
> +
> + Method (_LPI, 0, NotSerialized) {
> + Return (\_SB.PLPI)
> + }
> }
> }
>
> Device (CL01) { // Cluster 1
> Name (_HID, "ACPI0010")
> Name (_UID, 1)
> + Method (_LPI, 0, NotSerialized) {
> + Return (\_SB.CLPI)
> + }
>
> Device (CP01) { // Neoverse N2 core 1
> Name (_HID, "ACPI0007")
> Name (_UID, 1)
> Name (_STA, 0xF)
> +
> + Method (_LPI, 0, NotSerialized) {
> + Return (\_SB.PLPI)
> + }
> }
> }
>
> Device (CL02) { // Cluster 2
> Name (_HID, "ACPI0010")
> Name (_UID, 2)
> + Method (_LPI, 0, NotSerialized) {
> + Return (\_SB.CLPI)
> + }
>
> Device (CP02) { // Neoverse N2 core 2
> Name (_HID, "ACPI0007")
> Name (_UID, 2)
> Name (_STA, 0xF)
> +
> + Method (_LPI, 0, NotSerialized) {
> + Return (\_SB.PLPI)
> + }
> }
> }
>
> Device (CL03) { // Cluster 3
> Name (_HID, "ACPI0010")
> Name (_UID, 3)
> + Method (_LPI, 0, NotSerialized) {
> + Return (\_SB.CLPI)
> + }
>
> Device (CP03) { // Neoverse N2 core 3
> Name (_HID, "ACPI0007")
> Name (_UID, 3)
> Name (_STA, 0xF)
> +
> + Method (_LPI, 0, NotSerialized) {
> + Return (\_SB.PLPI)
> + }
> }
> }
>
> Device (CL04) { // Cluster 4
> Name (_HID, "ACPI0010")
> Name (_UID, 4)
> + Method (_LPI, 0, NotSerialized) {
> + Return (\_SB.CLPI)
> + }
>
> Device (CP04) { // Neoverse N2 core 4
> Name (_HID, "ACPI0007")
> Name (_UID, 4)
> Name (_STA, 0xF)
> +
> + Method (_LPI, 0, NotSerialized) {
> + Return (\_SB.PLPI)
> + }
> }
> }
>
> Device (CL05) { // Cluster 5
> Name (_HID, "ACPI0010")
> Name (_UID, 5)
> + Method (_LPI, 0, NotSerialized) {
> + Return (\_SB.CLPI)
> + }
>
> Device (CP05) { // Neoverse N2 core 5
> Name (_HID, "ACPI0007")
> Name (_UID, 5)
> Name (_STA, 0xF)
> +
> + Method (_LPI, 0, NotSerialized) {
> + Return (\_SB.PLPI)
> + }
> }
> }
>
> Device (CL06) { // Cluster 6
> Name (_HID, "ACPI0010")
> Name (_UID, 6)
> + Method (_LPI, 0, NotSerialized) {
> + Return (\_SB.CLPI)
> + }
>
> Device (CP06) { // Neoverse N2 core 6
> Name (_HID, "ACPI0007")
> Name (_UID, 6)
> Name (_STA, 0xF)
> +
> + Method (_LPI, 0, NotSerialized) {
> + Return (\_SB.PLPI)
> + }
> }
> }
>
> Device (CL07) { // Cluster 7
> Name (_HID, "ACPI0010")
> Name (_UID, 7)
> + Method (_LPI, 0, NotSerialized) {
> + Return (\_SB.CLPI)
> + }
>
> Device (CP07) { // Neoverse N2 core 7
> Name (_HID, "ACPI0007")
> Name (_UID, 7)
> Name (_STA, 0xF)
> +
> + Method (_LPI, 0, NotSerialized) {
> + Return (\_SB.PLPI)
> + }
> }
> }
> } // Scope(_SB)
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