04c1db1e57
This patch introduces the following three platform interfaces: * void plat_psci_stat_accounting_start(const psci_power_state_t *state_info) This is an optional hook that platforms can implement in order to perform accounting before entering a low power state. This typically involves capturing a timestamp. * void plat_psci_stat_accounting_stop(const psci_power_state_t *state_info) This is an optional hook that platforms can implement in order to perform accounting after exiting from a low power state. This typically involves capturing a timestamp. * u_register_t plat_psci_stat_get_residency(unsigned int lvl, const psci_power_state_t *state_info, unsigned int last_cpu_index) This is an optional hook that platforms can implement in order to calculate the PSCI stat residency. If any of these interfaces are overridden by the platform, it is recommended that all of them are. By default `ENABLE_PSCI_STAT` is disabled. If `ENABLE_PSCI_STAT` is set but `ENABLE_PMF` is not set then an alternative PSCI stat collection backend must be provided. If both are set, then default weak definitions of these functions are provided, using PMF to calculate the residency. NOTE: Previously, platforms did not have to explicitly set `ENABLE_PMF` since this was automatically done by the top-level Makefile. Change-Id: I17b47804dea68c77bc284df15ee1ccd66bc4b79b Signed-off-by: dp-arm <dimitris.papastamos@arm.com> |
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| bl31 | ||
| bl32 | ||
| common | ||
| drivers | ||
| lib | ||
| plat | ||
| services | ||