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Diffstat (limited to 'docs/porting-guide.md')
| -rw-r--r-- | docs/porting-guide.md | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/docs/porting-guide.md b/docs/porting-guide.md index 9ba18ba..5fe6acd 100644 --- a/docs/porting-guide.md +++ b/docs/porting-guide.md @@ -108,6 +108,13 @@ file is found in [plat/fvp/include/platform_def.h]. GIC IRQ ID. E.g. `PLAT_MAX_SPI_OFFSET_ID` = 10 means that IRQ #42 is the last SPI. +* **#define : PLAT_LOCAL_PSTATE_WIDTH** + + Defines the bit-field width of the local state in State-ID field of + the power-state parameter. This macro will be used by the TFTF framework + to compose the State-ID field given the local power state at different + affinity levels. + * **#define : TFTF_BASE** Defines the base address of the TFTF binary in DRAM. Used by the linker @@ -237,6 +244,17 @@ API is used by the topology framework in TFTF to query the presence of a CPU and ,if present, returns the corresponding MPIDR for it. If the CPU referred to by the 'core_pos' is absent, then this function returns INVALID_MPID. +### Function : plat_get_state_prop() [mandatory] + + Argument : unsigned int + Return : const plat_state_prop_t * + +This functions returns the `plat_state_prop_t` array for all the valid low +power states from platform for a specified `affinity level` and returns NULL +for an invalid `affinity level`. The array is expected to be NULL terminated. +This function is expected to be used by tests that need to compose the power +state parameter for use in PSCI_CPU_SUSPEND API or PSCI_STAT/RESIDENCY API. + 4. Optional modifications -------------------------- |