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Clarify dependency for PSCI_EXTENDED_STATE_ID 

Add dependency information in the user guide for ARM_RECOM_STATE_ID_ENC
that needs to be set when using PSCI_EXTENDED_STATE_ID on ARM
platforms. Also clarify the build error message.

Change-Id: Id125a0299b179f5f222bca4e2503204bf89a3c59
Signed-off-by: Douglas Raillard <douglas.raillard@arm.com>
This commit is contained in:
Douglas Raillard 2016-11-07 17:29:34 +00:00
parent 686019d206
commit 91a422d69f
2 changed files with 6 additions and 4 deletions
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3
docs/user-guide.md
View File

@ -380,7 +380,8 @@ performed.
means by default the original power-state format is used by the PSCI means by default the original power-state format is used by the PSCI
implementation. This flag should be specified by the platform makefile implementation. This flag should be specified by the platform makefile
and it governs the return value of PSCI_FEATURES API for CPU_SUSPEND and it governs the return value of PSCI_FEATURES API for CPU_SUSPEND
smc function id. smc function id. When this option is enabled on ARM platforms, the
option `ARM_RECOM_STATE_ID_ENC` needs to be set to 1 as well.
* `RESET_TO_BL31`: Enable BL31 entrypoint as the CPU reset vector instead * `RESET_TO_BL31`: Enable BL31 entrypoint as the CPU reset vector instead
of the BL1 entrypoint. It can take the value 0 (CPU reset to BL1 of the BL1 entrypoint. It can take the value 0 (CPU reset to BL1

7
plat/arm/common/arm_common.mk
View File

@ -58,11 +58,12 @@ endif
# State-ID encoding to be parsed. # State-ID encoding to be parsed.
ARM_RECOM_STATE_ID_ENC := 0 ARM_RECOM_STATE_ID_ENC := 0
# If the PSCI_EXTENDED_STATE_ID is set, then the recommended state ID need to # If the PSCI_EXTENDED_STATE_ID is set, then ARM_RECOM_STATE_ID_ENC need to
# be used. Else throw a build error. # be set. Else throw a build error.
ifeq (${PSCI_EXTENDED_STATE_ID}, 1) ifeq (${PSCI_EXTENDED_STATE_ID}, 1)
ifeq (${ARM_RECOM_STATE_ID_ENC}, 0) ifeq (${ARM_RECOM_STATE_ID_ENC}, 0)
$(error "Incompatible STATE_ID build option specified") $(error Build option ARM_RECOM_STATE_ID_ENC needs to be set if \
PSCI_EXTENDED_STATE_ID is set for ARM platforms)
endif endif
endif endif