u-boot.git/doc/arch/index.rst, branch main

x86: doc: Move into its own directory

2023-09-21T22:05:40Z

There is enough material that it makes sense to split this up into several files. Create an x86/ directory for this purpose. Signed-off-by: Simon Glass Reviewed-by: Bin Meng

arm_ffa: introduce Arm FF-A support

2023-08-08T14:22:03Z

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 Reviewed-by: Simon Glass Reviewed-by: Ilias Apalodimas Cc: Tom Rini Cc: Jens Wiklander Cc: Heinrich Schuchardt

Revert "Merge branch '2023-07-24-introduce-FF-A-suppport'"

2023-07-24T23:51:05Z

This reverts commit d927d1a80843e1c3e2a3f0b8f6150790bef83da1, reversing changes made to c07ad9520c6190070513016fdb495d4703a4a853. These changes do not pass CI currently. Signed-off-by: Tom Rini

arm_ffa: introduce Arm FF-A support

2023-07-24T19:30:03Z

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 Reviewed-by: Simon Glass Cc: Tom Rini Cc: Ilias Apalodimas Cc: Jens Wiklander Cc: Heinrich Schuchardt

doc: arch: Add document for RISC-V architecture

2023-02-19T20:15:15Z

This patch adds a brief introduction to the RISC-V architecture and the typical boot process used on a variety of RISC-V platforms. Signed-off-by: Yu Chien Peter Lin Reviewed-by: Samuel Holland Reviewed-by: Simon Glass Reviewed-by: Rick Chen Reviewed-by: Heinrich Schuchardt

dm: Add documentation for host command and implementation

2022-11-07T23:24:30Z

Document the 'host' command and also the internals of how it is implemented. Signed-off-by: Simon Glass

nds32: Remove the architecture

2022-04-25T20:04:05Z

As removal of nds32 has been ack'd for the Linux kernel, remove support here as well. Cc: Rick Chen Signed-off-by: Tom Rini Reviewed-by: Rick Chen

doc: arch: Convert README.xtensa to reST

2019-07-24T14:10:12Z

Convert plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by: Bin Meng

doc: arch: Convert README.sandbox to reST

2019-07-24T14:10:10Z

Convert plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by: Bin Meng

doc: arch: Convert README.sh to reST

2019-07-24T14:10:08Z

Convert plain text documentation to reStructuredText format and add it to Sphinx TOC tree. No essential content change. Signed-off-by: Bin Meng