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c09bfc666c
Add Arm FF-A support implementing Arm Firmware Framework for Armv8-A v1.0 The Firmware Framework for Arm A-profile processors (FF-A v1.0) [1] describes interfaces (ABIs) that standardize communication between the Secure World and Normal World leveraging TrustZone technology. This driver uses 64-bit registers as per SMCCCv1.2 spec and comes on top of the SMCCC layer. The driver provides the FF-A ABIs needed for querying the FF-A framework from the secure world. The driver uses SMC32 calling convention which means using the first 32-bit data of the Xn registers. All supported ABIs come with their 32-bit version except FFA_RXTX_MAP which has 64-bit version supported. Both 32-bit and 64-bit direct messaging are supported which allows both 32-bit and 64-bit clients to use the FF-A bus. FF-A is a discoverable bus and similar to architecture features. FF-A bus is discovered using ARM_SMCCC_FEATURES mechanism performed by the PSCI driver. Clients are able to probe then use the FF-A bus by calling the DM class searching APIs (e.g: uclass_first_device). The Secure World is considered as one entity to communicate with using the FF-A bus. FF-A communication is handled by one device and one instance (the bus). This FF-A driver takes care of all the interactions between Normal world and Secure World. The driver exports its operations to be used by upper layers. Exported operations: - ffa_partition_info_get - ffa_sync_send_receive - ffa_rxtx_unmap Generic FF-A methods are implemented in the Uclass (arm-ffa-uclass.c). Arm specific methods are implemented in the Arm driver (arm-ffa.c). For more details please refer to the driver documentation [2]. [1]: https://developer.arm.com/documentation/den0077/latest/ [2]: doc/arch/arm64.ffa.rst Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> Reviewed-by: Simon Glass <sjg@chromium.org> Cc: Tom Rini <trini@konsulko.com> Cc: Ilias Apalodimas <ilias.apalodimas@linaro.org> Cc: Jens Wiklander <jens.wiklander@linaro.org> Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
49 lines
1.4 KiB
Text
49 lines
1.4 KiB
Text
config FIRMWARE
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bool "Enable Firmware driver support"
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config SPL_FIRMWARE
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bool "Enable Firmware driver support in SPL"
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depends on FIRMWARE && SPL
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config SPL_ARM_PSCI_FW
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bool
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select SPL_FIRMWARE
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config ARM_PSCI_FW
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bool
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select FIRMWARE
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config TI_SCI_PROTOCOL
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tristate "TI System Control Interface (TISCI) Message Protocol"
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depends on K3_SEC_PROXY
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select FIRMWARE
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select SPL_FIRMWARE if SPL
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help
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TI System Control Interface (TISCI) Message Protocol is used to manage
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compute systems such as ARM, DSP etc with the system controller in
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complex System on Chip (SoC) such as those found on certain K3
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generation SoC from TI.
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This protocol library is used by client drivers to use the features
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provided by the system controller.
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config ZYNQMP_FIRMWARE
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bool "ZynqMP Firmware interface"
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select FIRMWARE
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help
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Firmware interface driver is used by different
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drivers to communicate with the firmware for
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various platform management services.
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Say yes to enable ZynqMP firmware interface driver.
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If in doubt, say N.
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config ARM_SMCCC_FEATURES
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bool "Arm SMCCC features discovery"
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depends on ARM_PSCI_FW
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help
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Discover Arm SMCCC features for which a U-Boot driver is defined. When enabled,
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the PSCI driver is always probed and binds dirvers registered to the Arm SMCCC
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services if any and reported as supported by the SMCCC firmware.
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source "drivers/firmware/arm-ffa/Kconfig"
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source "drivers/firmware/scmi/Kconfig"
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