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Merge pull request #245 from danh-arm/sm/psci_version
Increment the PSCI VERSION to 1.0 (PR v2)
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danh-arm
commit
07ddb33a8e
@ -734,32 +734,43 @@ restoring the stack and CPU state and returning from the original SMC.
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TODO: Provide design walkthrough of PSCI implementation.
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The complete PSCI API is not yet implemented. The following functions are
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currently implemented:
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The PSCI v1.0 specification categorizes APIs as optional and mandatory. All the
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mandatory APIs in PSCI v1.0 and all the APIs in PSCI v0.2 draft specification
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[Power State Coordination Interface PDD] [PSCI] are implemented. The table lists
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the PSCI v1.0 APIs and their support in generic code.
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- `PSCI_VERSION`
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- `CPU_OFF`
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- `CPU_ON`
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- `CPU_SUSPEND`
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- `AFFINITY_INFO`
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- `SYSTEM_OFF`
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- `SYSTEM_RESET`
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An API implementation might have a dependency on platform code e.g. CPU_SUSPEND
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requires the platform to export a part of the implementation. Hence the level
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of support of the mandatory APIs depends upon the support exported by the
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platform port as well. The Juno and FVP (all variants) platforms export all the
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required support.
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The `CPU_ON`, `CPU_OFF` and `CPU_SUSPEND` functions implement the warm boot
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path in ARM Trusted Firmware. `CPU_ON` and `CPU_OFF` have undergone testing
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on all the supported FVPs. `CPU_SUSPEND` & `AFFINITY_INFO` have undergone
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testing only on the AEM v8 Base FVP. Support for `AFFINITY_INFO` is still
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experimental. Support for `CPU_SUSPEND` is stable for entry into power down
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states. Standby states are currently not supported. `PSCI_VERSION` is
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present but completely untested in this version of the software.
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| PSCI v1.0 API |Supported| Comments |
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|:----------------------|:--------|:------------------------------------------|
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|`PSCI_VERSION` | Yes | The version returned is 1.0 |
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|`CPU_SUSPEND` | Yes* | The original `power_state` format is used |
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|`CPU_OFF` | Yes* | |
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|`CPU_ON` | Yes* | |
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|`AFFINITY_INFO` | Yes | |
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|`MIGRATE` | Yes** | |
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|`MIGRATE_INFO_TYPE` | Yes** | |
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|`MIGRATE_INFO_CPU` | Yes** | |
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|`SYSTEM_OFF` | Yes* | |
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|`SYSTEM_RESET` | Yes* | |
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|`PSCI_FEATURES` | Yes | |
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|`CPU_FREEZE` | No | |
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|`CPU_DEFAULT_SUSPEND` | No | |
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|`CPU_HW_STATE` | No | |
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|`SYSTEM_SUSPEND` | No | |
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|`PSCI_SET_SUSPEND_MODE`| No | |
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|`PSCI_STAT_RESIDENCY` | No | |
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|`PSCI_STAT_COUNT` | No | |
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The following unsupported functions return with a error code as documented in
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the [Power State Coordination Interface PDD] [PSCI].
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*Note : These PSCI APIs require platform power management hooks to be
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registered with the generic PSCI code to be supported.
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- `MIGRATE` : -1 (NOT_SUPPORTED)
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- `MIGRATE_INFO_TYPE` : 2 (Trusted OS is either not present or does not
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require migration)
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- `MIGRATE_INFO_UP_CPU` : 0 (Return value is UNDEFINED)
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**Note : These PSCI APIs require appropriate Secure Payload Dispatcher
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hooks to be registered with the generic PSCI code to be supported.
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5. Secure-EL1 Payloads and Dispatchers
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Binary file not shown.
@ -52,7 +52,7 @@
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};
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psci {
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compatible = "arm,psci";
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compatible = "arm,psci-1.0", "arm,psci-0.2", "arm,psci";
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method = "smc";
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cpu_suspend = <0xc4000001>;
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cpu_off = <0x84000002>;
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Binary file not shown.
@ -52,7 +52,7 @@
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};
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psci {
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compatible = "arm,psci";
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compatible = "arm,psci-1.0", "arm,psci-0.2", "arm,psci";
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method = "smc";
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cpu_suspend = <0xc4000001>;
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cpu_off = <0x84000002>;
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Binary file not shown.
@ -52,7 +52,7 @@
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};
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psci {
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compatible = "arm,psci";
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compatible = "arm,psci-1.0", "arm,psci-0.2", "arm,psci";
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method = "smc";
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cpu_suspend = <0xc4000001>;
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cpu_off = <0x84000002>;
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@ -52,7 +52,7 @@
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};
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psci {
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compatible = "arm,psci";
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compatible = "arm,psci-1.0", "arm,psci-0.2", "arm,psci";
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method = "smc";
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cpu_suspend = <0xc4000001>;
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cpu_off = <0x84000002>;
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@ -83,7 +83,7 @@
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};
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idle-states {
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entry-method = "arm,psci";
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entry-method = "arm,psci-1.0", "arm,psci-0.2", "arm,psci";
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CPU_SLEEP_0: cpu-sleep-0 {
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compatible = "arm,idle-state";
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Binary file not shown.
@ -52,7 +52,7 @@
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};
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psci {
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compatible = "arm,psci";
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compatible = "arm,psci-1.0", "arm,psci-0.2", "arm,psci";
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method = "smc";
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cpu_suspend = <0xc4000001>;
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cpu_off = <0x84000002>;
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@ -115,8 +115,8 @@
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/*******************************************************************************
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* PSCI version
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******************************************************************************/
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#define PSCI_MAJOR_VER (0 << 16)
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#define PSCI_MINOR_VER 0x2
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#define PSCI_MAJOR_VER (1 << 16)
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#define PSCI_MINOR_VER 0x0
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/*******************************************************************************
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* PSCI error codes
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