| Trusted Firmware-A User Guide |
| ============================= |
| |
| |
| .. section-numbering:: |
| :suffix: . |
| |
| .. contents:: |
| |
| This document describes how to build Trusted Firmware-A (TF-A) and run it with a |
| tested set of other software components using defined configurations on the Juno |
| Arm development platform and Arm Fixed Virtual Platform (FVP) models. It is |
| possible to use other software components, configurations and platforms but that |
| is outside the scope of this document. |
| |
| This document assumes that the reader has previous experience running a fully |
| bootable Linux software stack on Juno or FVP using the prebuilt binaries and |
| filesystems provided by `Linaro`_. Further information may be found in the |
| `Linaro instructions`_. It also assumes that the user understands the role of |
| the different software components required to boot a Linux system: |
| |
| - Specific firmware images required by the platform (e.g. SCP firmware on Juno) |
| - Normal world bootloader (e.g. UEFI or U-Boot) |
| - Device tree |
| - Linux kernel image |
| - Root filesystem |
| |
| This document also assumes that the user is familiar with the `FVP models`_ and |
| the different command line options available to launch the model. |
| |
| This document should be used in conjunction with the `Firmware Design`_. |
| |
| Host machine requirements |
| ------------------------- |
| |
| The minimum recommended machine specification for building the software and |
| running the FVP models is a dual-core processor running at 2GHz with 12GB of |
| RAM. For best performance, use a machine with a quad-core processor running at |
| 2.6GHz with 16GB of RAM. |
| |
| The software has been tested on Ubuntu 16.04 LTS (64-bit). Packages used for |
| building the software were installed from that distribution unless otherwise |
| specified. |
| |
| The software has also been built on Windows 7 Enterprise SP1, using CMD.EXE, |
| Cygwin, and Msys (MinGW) shells, using version 5.3.1 of the GNU toolchain. |
| |
| Tools |
| ----- |
| |
| Install the required packages to build TF-A with the following command: |
| |
| :: |
| |
| sudo apt-get install build-essential gcc make git libssl-dev |
| |
| TF-A has been tested with `Linaro Release 17.10`_. |
| |
| Download and install the AArch32 or AArch64 little-endian GCC cross compiler. |
| The `Linaro Release Notes`_ documents which version of the compiler to use for a |
| given Linaro Release. Also, these `Linaro instructions`_ provide further |
| guidance and a script, which can be used to download Linaro deliverables |
| automatically. |
| |
| Optionally, TF-A can be built using clang or Arm Compiler 6. |
| See instructions below on how to switch the default compiler. |
| |
| In addition, the following optional packages and tools may be needed: |
| |
| - ``device-tree-compiler`` package if you need to rebuild the Flattened Device |
| Tree (FDT) source files (``.dts`` files) provided with this software. |
| |
| - For debugging, Arm `Development Studio 5 (DS-5)`_. |
| |
| - To create and modify the diagram files included in the documentation, `Dia`_. |
| This tool can be found in most Linux distributions. Inkscape is needed to |
| generate the actual *.png files. |
| |
| Getting the TF-A source code |
| ---------------------------- |
| |
| Download the TF-A source code from Github: |
| |
| :: |
| |
| git clone https://github.com/ARM-software/arm-trusted-firmware.git |
| |
| Building TF-A |
| ------------- |
| |
| - Before building TF-A, the environment variable ``CROSS_COMPILE`` must point |
| to the Linaro cross compiler. |
| |
| For AArch64: |
| |
| :: |
| |
| export CROSS_COMPILE=<path-to-aarch64-gcc>/bin/aarch64-linux-gnu- |
| |
| For AArch32: |
| |
| :: |
| |
| export CROSS_COMPILE=<path-to-aarch32-gcc>/bin/arm-linux-gnueabihf- |
| |
| It is possible to build TF-A using clang or Arm Compiler 6. To do so |
| ``CC`` needs to point to the clang or armclang binary. Only the compiler |
| is switched; the assembler and linker need to be provided by the GNU |
| toolchain, thus ``CROSS_COMPILE`` should be set as described above. |
| |
| Arm Compiler 6 will be selected when the base name of the path assigned |
| to ``CC`` matches the string 'armclang'. |
| |
| For AArch64 using Arm Compiler 6: |
| |
| :: |
| |
| export CROSS_COMPILE=<path-to-aarch64-gcc>/bin/aarch64-linux-gnu- |
| make CC=<path-to-armclang>/bin/armclang PLAT=<platform> all |
| |
| Clang will be selected when the base name of the path assigned to ``CC`` |
| contains the string 'clang'. This is to allow both clang and clang-X.Y |
| to work. |
| |
| For AArch64 using clang: |
| |
| :: |
| |
| export CROSS_COMPILE=<path-to-aarch64-gcc>/bin/aarch64-linux-gnu- |
| make CC=<path-to-clang>/bin/clang PLAT=<platform> all |
| |
| - Change to the root directory of the TF-A source tree and build. |
| |
| For AArch64: |
| |
| :: |
| |
| make PLAT=<platform> all |
| |
| For AArch32: |
| |
| :: |
| |
| make PLAT=<platform> ARCH=aarch32 AARCH32_SP=sp_min all |
| |
| Notes: |
| |
| - If ``PLAT`` is not specified, ``fvp`` is assumed by default. See the |
| `Summary of build options`_ for more information on available build |
| options. |
| |
| - (AArch32 only) Currently only ``PLAT=fvp`` is supported. |
| |
| - (AArch32 only) ``AARCH32_SP`` is the AArch32 EL3 Runtime Software and it |
| corresponds to the BL32 image. A minimal ``AARCH32_SP``, sp\_min, is |
| provided by TF-A to demonstrate how PSCI Library can be integrated with |
| an AArch32 EL3 Runtime Software. Some AArch32 EL3 Runtime Software may |
| include other runtime services, for example Trusted OS services. A guide |
| to integrate PSCI library with AArch32 EL3 Runtime Software can be found |
| `here`_. |
| |
| - (AArch64 only) The TSP (Test Secure Payload), corresponding to the BL32 |
| image, is not compiled in by default. Refer to the |
| `Building the Test Secure Payload`_ section below. |
| |
| - By default this produces a release version of the build. To produce a |
| debug version instead, refer to the "Debugging options" section below. |
| |
| - The build process creates products in a ``build`` directory tree, building |
| the objects and binaries for each boot loader stage in separate |
| sub-directories. The following boot loader binary files are created |
| from the corresponding ELF files: |
| |
| - ``build/<platform>/<build-type>/bl1.bin`` |
| - ``build/<platform>/<build-type>/bl2.bin`` |
| - ``build/<platform>/<build-type>/bl31.bin`` (AArch64 only) |
| - ``build/<platform>/<build-type>/bl32.bin`` (mandatory for AArch32) |
| |
| where ``<platform>`` is the name of the chosen platform and ``<build-type>`` |
| is either ``debug`` or ``release``. The actual number of images might differ |
| depending on the platform. |
| |
| - Build products for a specific build variant can be removed using: |
| |
| :: |
| |
| make DEBUG=<D> PLAT=<platform> clean |
| |
| ... where ``<D>`` is ``0`` or ``1``, as specified when building. |
| |
| The build tree can be removed completely using: |
| |
| :: |
| |
| make realclean |
| |
| Summary of build options |
| ~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| The TF-A build system supports the following build options. Unless mentioned |
| otherwise, these options are expected to be specified at the build command |
| line and are not to be modified in any component makefiles. Note that the |
| build system doesn't track dependency for build options. Therefore, if any of |
| the build options are changed from a previous build, a clean build must be |
| performed. |
| |
| Common build options |
| ^^^^^^^^^^^^^^^^^^^^ |
| |
| - ``AARCH32_SP`` : Choose the AArch32 Secure Payload component to be built as |
| as the BL32 image when ``ARCH=aarch32``. The value should be the path to the |
| directory containing the SP source, relative to the ``bl32/``; the directory |
| is expected to contain a makefile called ``<aarch32_sp-value>.mk``. |
| |
| - ``ARCH`` : Choose the target build architecture for TF-A. It can take either |
| ``aarch64`` or ``aarch32`` as values. By default, it is defined to |
| ``aarch64``. |
| |
| - ``ARM_ARCH_MAJOR``: The major version of Arm Architecture to target when |
| compiling TF-A. Its value must be numeric, and defaults to 8 . See also, |
| *Armv8 Architecture Extensions* and *Armv7 Architecture Extensions* in |
| `Firmware Design`_. |
| |
| - ``ARM_ARCH_MINOR``: The minor version of Arm Architecture to target when |
| compiling TF-A. Its value must be a numeric, and defaults to 0. See also, |
| *Armv8 Architecture Extensions* in `Firmware Design`_. |
| |
| - ``ARM_GIC_ARCH``: Choice of Arm GIC architecture version used by the Arm |
| Legacy GIC driver for implementing the platform GIC API. This API is used |
| by the interrupt management framework. Default is 2 (that is, version 2.0). |
| This build option is deprecated. |
| |
| - ``ARM_PLAT_MT``: This flag determines whether the Arm platform layer has to |
| cater for the multi-threading ``MT`` bit when accessing MPIDR. When this flag |
| is set, the functions which deal with MPIDR assume that the ``MT`` bit in |
| MPIDR is set and access the bit-fields in MPIDR accordingly. Default value of |
| this flag is 0. Note that this option is not used on FVP platforms. |
| |
| - ``BL2``: This is an optional build option which specifies the path to BL2 |
| image for the ``fip`` target. In this case, the BL2 in the TF-A will not be |
| built. |
| |
| - ``BL2U``: This is an optional build option which specifies the path to |
| BL2U image. In this case, the BL2U in TF-A will not be built. |
| |
| - ``BL2_AT_EL3``: This is an optional build option that enables the use of |
| BL2 at EL3 execution level. |
| |
| - ``BL2_IN_XIP_MEM``: In some use-cases BL2 will be stored in eXecute In Place |
| (XIP) memory, like BL1. In these use-cases, it is necessary to initialize |
| the RW sections in RAM, while leaving the RO sections in place. This option |
| enable this use-case. For now, this option is only supported when BL2_AT_EL3 |
| is set to '1'. |
| |
| - ``BL31``: This is an optional build option which specifies the path to |
| BL31 image for the ``fip`` target. In this case, the BL31 in TF-A will not |
| be built. |
| |
| - ``BL31_KEY``: This option is used when ``GENERATE_COT=1``. It specifies the |
| file that contains the BL31 private key in PEM format. If ``SAVE_KEYS=1``, |
| this file name will be used to save the key. |
| |
| - ``BL32``: This is an optional build option which specifies the path to |
| BL32 image for the ``fip`` target. In this case, the BL32 in TF-A will not |
| be built. |
| |
| - ``BL32_EXTRA1``: This is an optional build option which specifies the path to |
| Trusted OS Extra1 image for the ``fip`` target. |
| |
| - ``BL32_EXTRA2``: This is an optional build option which specifies the path to |
| Trusted OS Extra2 image for the ``fip`` target. |
| |
| - ``BL32_KEY``: This option is used when ``GENERATE_COT=1``. It specifies the |
| file that contains the BL32 private key in PEM format. If ``SAVE_KEYS=1``, |
| this file name will be used to save the key. |
| |
| - ``BL33``: Path to BL33 image in the host file system. This is mandatory for |
| ``fip`` target in case TF-A BL2 is used. |
| |
| - ``BL33_KEY``: This option is used when ``GENERATE_COT=1``. It specifies the |
| file that contains the BL33 private key in PEM format. If ``SAVE_KEYS=1``, |
| this file name will be used to save the key. |
| |
| - ``BUILD_MESSAGE_TIMESTAMP``: String used to identify the time and date of the |
| compilation of each build. It must be set to a C string (including quotes |
| where applicable). Defaults to a string that contains the time and date of |
| the compilation. |
| |
| - ``BUILD_STRING``: Input string for VERSION\_STRING, which allows the TF-A |
| build to be uniquely identified. Defaults to the current git commit id. |
| |
| - ``CFLAGS``: Extra user options appended on the compiler's command line in |
| addition to the options set by the build system. |
| |
| - ``COLD_BOOT_SINGLE_CPU``: This option indicates whether the platform may |
| release several CPUs out of reset. It can take either 0 (several CPUs may be |
| brought up) or 1 (only one CPU will ever be brought up during cold reset). |
| Default is 0. If the platform always brings up a single CPU, there is no |
| need to distinguish between primary and secondary CPUs and the boot path can |
| be optimised. The ``plat_is_my_cpu_primary()`` and |
| ``plat_secondary_cold_boot_setup()`` platform porting interfaces do not need |
| to be implemented in this case. |
| |
| - ``CRASH_REPORTING``: A non-zero value enables a console dump of processor |
| register state when an unexpected exception occurs during execution of |
| BL31. This option defaults to the value of ``DEBUG`` - i.e. by default |
| this is only enabled for a debug build of the firmware. |
| |
| - ``CREATE_KEYS``: This option is used when ``GENERATE_COT=1``. It tells the |
| certificate generation tool to create new keys in case no valid keys are |
| present or specified. Allowed options are '0' or '1'. Default is '1'. |
| |
| - ``CTX_INCLUDE_AARCH32_REGS`` : Boolean option that, when set to 1, will cause |
| the AArch32 system registers to be included when saving and restoring the |
| CPU context. The option must be set to 0 for AArch64-only platforms (that |
| is on hardware that does not implement AArch32, or at least not at EL1 and |
| higher ELs). Default value is 1. |
| |
| - ``CTX_INCLUDE_FPREGS``: Boolean option that, when set to 1, will cause the FP |
| registers to be included when saving and restoring the CPU context. Default |
| is 0. |
| |
| - ``DEBUG``: Chooses between a debug and release build. It can take either 0 |
| (release) or 1 (debug) as values. 0 is the default. |
| |
| - ``DYN_DISABLE_AUTH``: Enables the capability to disable Trusted Board Boot |
| authentication. This option is only meant to be enabled for development |
| platforms. Both TRUSTED_BOARD_BOOT and the LOAD_IMAGE_V2 flags need to be |
| set if this flag has to be enabled. 0 is the default. |
| |
| - ``EL3_PAYLOAD_BASE``: This option enables booting an EL3 payload instead of |
| the normal boot flow. It must specify the entry point address of the EL3 |
| payload. Please refer to the "Booting an EL3 payload" section for more |
| details. |
| |
| - ``ENABLE_AMU``: Boolean option to enable Activity Monitor Unit extensions. |
| This is an optional architectural feature available on v8.4 onwards. Some |
| v8.2 implementations also implement an AMU and this option can be used to |
| enable this feature on those systems as well. Default is 0. |
| |
| - ``ENABLE_ASSERTIONS``: This option controls whether or not calls to ``assert()`` |
| are compiled out. For debug builds, this option defaults to 1, and calls to |
| ``assert()`` are left in place. For release builds, this option defaults to 0 |
| and calls to ``assert()`` function are compiled out. This option can be set |
| independently of ``DEBUG``. It can also be used to hide any auxiliary code |
| that is only required for the assertion and does not fit in the assertion |
| itself. |
| |
| - ``ENABLE_PMF``: Boolean option to enable support for optional Performance |
| Measurement Framework(PMF). Default is 0. |
| |
| - ``ENABLE_PSCI_STAT``: Boolean option to enable support for optional PSCI |
| functions ``PSCI_STAT_RESIDENCY`` and ``PSCI_STAT_COUNT``. Default is 0. |
| In the absence of an alternate stat collection backend, ``ENABLE_PMF`` must |
| be enabled. If ``ENABLE_PMF`` is set, the residency statistics are tracked in |
| software. |
| |
| - ``ENABLE_RUNTIME_INSTRUMENTATION``: Boolean option to enable runtime |
| instrumentation which injects timestamp collection points into TF-A to |
| allow runtime performance to be measured. Currently, only PSCI is |
| instrumented. Enabling this option enables the ``ENABLE_PMF`` build option |
| as well. Default is 0. |
| |
| - ``ENABLE_SPE_FOR_LOWER_ELS`` : Boolean option to enable Statistical Profiling |
| extensions. This is an optional architectural feature for AArch64. |
| The default is 1 but is automatically disabled when the target architecture |
| is AArch32. |
| |
| - ``ENABLE_SVE_FOR_NS``: Boolean option to enable Scalable Vector Extension |
| (SVE) for the Non-secure world only. SVE is an optional architectural feature |
| for AArch64. Note that when SVE is enabled for the Non-secure world, access |
| to SIMD and floating-point functionality from the Secure world is disabled. |
| This is to avoid corruption of the Non-secure world data in the Z-registers |
| which are aliased by the SIMD and FP registers. The build option is not |
| compatible with the ``CTX_INCLUDE_FPREGS`` build option, and will raise an |
| assert on platforms where SVE is implemented and ``ENABLE_SVE_FOR_NS`` set to |
| 1. The default is 1 but is automatically disabled when the target |
| architecture is AArch32. |
| |
| - ``ENABLE_STACK_PROTECTOR``: String option to enable the stack protection |
| checks in GCC. Allowed values are "all", "strong" and "0" (default). |
| "strong" is the recommended stack protection level if this feature is |
| desired. 0 disables the stack protection. For all values other than 0, the |
| ``plat_get_stack_protector_canary()`` platform hook needs to be implemented. |
| The value is passed as the last component of the option |
| ``-fstack-protector-$ENABLE_STACK_PROTECTOR``. |
| |
| - ``ERROR_DEPRECATED``: This option decides whether to treat the usage of |
| deprecated platform APIs, helper functions or drivers within Trusted |
| Firmware as error. It can take the value 1 (flag the use of deprecated |
| APIs as error) or 0. The default is 0. |
| |
| - ``EL3_EXCEPTION_HANDLING``: When set to ``1``, enable handling of exceptions |
| targeted at EL3. When set ``0`` (default), no exceptions are expected or |
| handled at EL3, and a panic will result. This is supported only for AArch64 |
| builds. |
| |
| - ``FAULT_INJECTION_SUPPORT``: ARMv8.4 externsions introduced support for fault |
| injection from lower ELs, and this build option enables lower ELs to use |
| Error Records accessed via System Registers to inject faults. This is |
| applicable only to AArch64 builds. |
| |
| This feature is intended for testing purposes only, and is advisable to keep |
| disabled for production images. |
| |
| - ``FIP_NAME``: This is an optional build option which specifies the FIP |
| filename for the ``fip`` target. Default is ``fip.bin``. |
| |
| - ``FWU_FIP_NAME``: This is an optional build option which specifies the FWU |
| FIP filename for the ``fwu_fip`` target. Default is ``fwu_fip.bin``. |
| |
| - ``GENERATE_COT``: Boolean flag used to build and execute the ``cert_create`` |
| tool to create certificates as per the Chain of Trust described in |
| `Trusted Board Boot`_. The build system then calls ``fiptool`` to |
| include the certificates in the FIP and FWU\_FIP. Default value is '0'. |
| |
| Specify both ``TRUSTED_BOARD_BOOT=1`` and ``GENERATE_COT=1`` to include support |
| for the Trusted Board Boot feature in the BL1 and BL2 images, to generate |
| the corresponding certificates, and to include those certificates in the |
| FIP and FWU\_FIP. |
| |
| Note that if ``TRUSTED_BOARD_BOOT=0`` and ``GENERATE_COT=1``, the BL1 and BL2 |
| images will not include support for Trusted Board Boot. The FIP will still |
| include the corresponding certificates. This FIP can be used to verify the |
| Chain of Trust on the host machine through other mechanisms. |
| |
| Note that if ``TRUSTED_BOARD_BOOT=1`` and ``GENERATE_COT=0``, the BL1 and BL2 |
| images will include support for Trusted Board Boot, but the FIP and FWU\_FIP |
| will not include the corresponding certificates, causing a boot failure. |
| |
| - ``GICV2_G0_FOR_EL3``: Unlike GICv3, the GICv2 architecture doesn't have |
| inherent support for specific EL3 type interrupts. Setting this build option |
| to ``1`` assumes GICv2 *Group 0* interrupts are expected to target EL3, both |
| by `platform abstraction layer`__ and `Interrupt Management Framework`__. |
| This allows GICv2 platforms to enable features requiring EL3 interrupt type. |
| This also means that all GICv2 Group 0 interrupts are delivered to EL3, and |
| the Secure Payload interrupts needs to be synchronously handed over to Secure |
| EL1 for handling. The default value of this option is ``0``, which means the |
| Group 0 interrupts are assumed to be handled by Secure EL1. |
| |
| .. __: `platform-interrupt-controller-API.rst` |
| .. __: `interrupt-framework-design.rst` |
| |
| - ``HANDLE_EA_EL3_FIRST``: When defined External Aborts and SError Interrupts |
| will be always trapped in EL3 i.e. in BL31 at runtime. |
| |
| - ``HW_ASSISTED_COHERENCY``: On most Arm systems to-date, platform-specific |
| software operations are required for CPUs to enter and exit coherency. |
| However, there exists newer systems where CPUs' entry to and exit from |
| coherency is managed in hardware. Such systems require software to only |
| initiate the operations, and the rest is managed in hardware, minimizing |
| active software management. In such systems, this boolean option enables |
| TF-A to carry out build and run-time optimizations during boot and power |
| management operations. This option defaults to 0 and if it is enabled, |
| then it implies ``WARMBOOT_ENABLE_DCACHE_EARLY`` is also enabled. |
| |
| - ``JUNO_AARCH32_EL3_RUNTIME``: This build flag enables you to execute EL3 |
| runtime software in AArch32 mode, which is required to run AArch32 on Juno. |
| By default this flag is set to '0'. Enabling this flag builds BL1 and BL2 in |
| AArch64 and facilitates the loading of ``SP_MIN`` and BL33 as AArch32 executable |
| images. |
| |
| - ``KEY_ALG``: This build flag enables the user to select the algorithm to be |
| used for generating the PKCS keys and subsequent signing of the certificate. |
| It accepts 3 values viz. ``rsa``, ``rsa_1_5``, ``ecdsa``. The ``rsa_1_5`` is |
| the legacy PKCS#1 RSA 1.5 algorithm which is not TBBR compliant and is |
| retained only for compatibility. The default value of this flag is ``rsa`` |
| which is the TBBR compliant PKCS#1 RSA 2.1 scheme. |
| |
| - ``HASH_ALG``: This build flag enables the user to select the secure hash |
| algorithm. It accepts 3 values viz. ``sha256``, ``sha384``, ``sha512``. |
| The default value of this flag is ``sha256``. |
| |
| - ``LDFLAGS``: Extra user options appended to the linkers' command line in |
| addition to the one set by the build system. |
| |
| - ``LOAD_IMAGE_V2``: Boolean option to enable support for new version (v2) of |
| image loading, which provides more flexibility and scalability around what |
| images are loaded and executed during boot. Default is 0. |
| Note: ``TRUSTED_BOARD_BOOT`` is currently only supported for AArch64 when |
| ``LOAD_IMAGE_V2`` is enabled. |
| |
| - ``LOG_LEVEL``: Chooses the log level, which controls the amount of console log |
| output compiled into the build. This should be one of the following: |
| |
| :: |
| |
| 0 (LOG_LEVEL_NONE) |
| 10 (LOG_LEVEL_NOTICE) |
| 20 (LOG_LEVEL_ERROR) |
| 30 (LOG_LEVEL_WARNING) |
| 40 (LOG_LEVEL_INFO) |
| 50 (LOG_LEVEL_VERBOSE) |
| |
| All log output up to and including the log level is compiled into the build. |
| The default value is 40 in debug builds and 20 in release builds. |
| |
| - ``NON_TRUSTED_WORLD_KEY``: This option is used when ``GENERATE_COT=1``. It |
| specifies the file that contains the Non-Trusted World private key in PEM |
| format. If ``SAVE_KEYS=1``, this file name will be used to save the key. |
| |
| - ``NS_BL2U``: Path to NS\_BL2U image in the host file system. This image is |
| optional. It is only needed if the platform makefile specifies that it |
| is required in order to build the ``fwu_fip`` target. |
| |
| - ``NS_TIMER_SWITCH``: Enable save and restore for non-secure timer register |
| contents upon world switch. It can take either 0 (don't save and restore) or |
| 1 (do save and restore). 0 is the default. An SPD may set this to 1 if it |
| wants the timer registers to be saved and restored. |
| |
| - ``PL011_GENERIC_UART``: Boolean option to indicate the PL011 driver that |
| the underlying hardware is not a full PL011 UART but a minimally compliant |
| generic UART, which is a subset of the PL011. The driver will not access |
| any register that is not part of the SBSA generic UART specification. |
| Default value is 0 (a full PL011 compliant UART is present). |
| |
| - ``PLAT``: Choose a platform to build TF-A for. The chosen platform name |
| must be subdirectory of any depth under ``plat/``, and must contain a |
| platform makefile named ``platform.mk``. For example, to build TF-A for the |
| Arm Juno board, select PLAT=juno. |
| |
| - ``PRELOADED_BL33_BASE``: This option enables booting a preloaded BL33 image |
| instead of the normal boot flow. When defined, it must specify the entry |
| point address for the preloaded BL33 image. This option is incompatible with |
| ``EL3_PAYLOAD_BASE``. If both are defined, ``EL3_PAYLOAD_BASE`` has priority |
| over ``PRELOADED_BL33_BASE``. |
| |
| - ``PROGRAMMABLE_RESET_ADDRESS``: This option indicates whether the reset |
| vector address can be programmed or is fixed on the platform. It can take |
| either 0 (fixed) or 1 (programmable). Default is 0. If the platform has a |
| programmable reset address, it is expected that a CPU will start executing |
| code directly at the right address, both on a cold and warm reset. In this |
| case, there is no need to identify the entrypoint on boot and the boot path |
| can be optimised. The ``plat_get_my_entrypoint()`` platform porting interface |
| does not need to be implemented in this case. |
| |
| - ``PSCI_EXTENDED_STATE_ID``: As per PSCI1.0 Specification, there are 2 formats |
| possible for the PSCI power-state parameter viz original and extended |
| State-ID formats. This flag if set to 1, configures the generic PSCI layer |
| to use the extended format. The default value of this flag is 0, which |
| means by default the original power-state format is used by the PSCI |
| implementation. This flag should be specified by the platform makefile |
| and it governs the return value of PSCI\_FEATURES API for CPU\_SUSPEND |
| 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. |
| |
| - ``RAS_EXTENSION``: When set to ``1``, enable Armv8.2 RAS features. RAS features |
| are an optional extension for pre-Armv8.2 CPUs, but are mandatory for Armv8.2 |
| or later CPUs. |
| |
| When ``RAS_EXTENSION`` is set to ``1``, ``HANDLE_EA_EL3_FIRST`` must also be |
| set to ``1``. |
| |
| This option is disabled by default. |
| |
| - ``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 |
| entrypoint) or 1 (CPU reset to BL31 entrypoint). |
| The default value is 0. |
| |
| - ``RESET_TO_SP_MIN``: SP\_MIN is the minimal AArch32 Secure Payload provided |
| in TF-A. This flag configures SP\_MIN entrypoint as the CPU reset vector |
| instead of the BL1 entrypoint. It can take the value 0 (CPU reset to BL1 |
| entrypoint) or 1 (CPU reset to SP\_MIN entrypoint). The default value is 0. |
| |
| - ``ROT_KEY``: This option is used when ``GENERATE_COT=1``. It specifies the |
| file that contains the ROT private key in PEM format. If ``SAVE_KEYS=1``, this |
| file name will be used to save the key. |
| |
| - ``SAVE_KEYS``: This option is used when ``GENERATE_COT=1``. It tells the |
| certificate generation tool to save the keys used to establish the Chain of |
| Trust. Allowed options are '0' or '1'. Default is '0' (do not save). |
| |
| - ``SCP_BL2``: Path to SCP\_BL2 image in the host file system. This image is optional. |
| If a SCP\_BL2 image is present then this option must be passed for the ``fip`` |
| target. |
| |
| - ``SCP_BL2_KEY``: This option is used when ``GENERATE_COT=1``. It specifies the |
| file that contains the SCP\_BL2 private key in PEM format. If ``SAVE_KEYS=1``, |
| this file name will be used to save the key. |
| |
| - ``SCP_BL2U``: Path to SCP\_BL2U image in the host file system. This image is |
| optional. It is only needed if the platform makefile specifies that it |
| is required in order to build the ``fwu_fip`` target. |
| |
| - ``SDEI_SUPPORT``: Setting this to ``1`` enables support for Software |
| Delegated Exception Interface to BL31 image. This defaults to ``0``. |
| |
| When set to ``1``, the build option ``EL3_EXCEPTION_HANDLING`` must also be |
| set to ``1``. |
| |
| - ``SEPARATE_CODE_AND_RODATA``: Whether code and read-only data should be |
| isolated on separate memory pages. This is a trade-off between security and |
| memory usage. See "Isolating code and read-only data on separate memory |
| pages" section in `Firmware Design`_. This flag is disabled by default and |
| affects all BL images. |
| |
| - ``SMCCC_MAJOR_VERSION``: Numeric value that indicates the major version of |
| the SMC Calling Convention that the Trusted Firmware supports. The only two |
| allowed values are 1 and 2, and it defaults to 1. The minor version is |
| determined using this value. |
| |
| - ``SPD``: Choose a Secure Payload Dispatcher component to be built into TF-A. |
| This build option is only valid if ``ARCH=aarch64``. The value should be |
| the path to the directory containing the SPD source, relative to |
| ``services/spd/``; the directory is expected to contain a makefile called |
| ``<spd-value>.mk``. |
| |
| - ``SPIN_ON_BL1_EXIT``: This option introduces an infinite loop in BL1. It can |
| take either 0 (no loop) or 1 (add a loop). 0 is the default. This loop stops |
| execution in BL1 just before handing over to BL31. At this point, all |
| firmware images have been loaded in memory, and the MMU and caches are |
| turned off. Refer to the "Debugging options" section for more details. |
| |
| - ``SP_MIN_WITH_SECURE_FIQ``: Boolean flag to indicate the SP_MIN handles |
| secure interrupts (caught through the FIQ line). Platforms can enable |
| this directive if they need to handle such interruption. When enabled, |
| the FIQ are handled in monitor mode and non secure world is not allowed |
| to mask these events. Platforms that enable FIQ handling in SP_MIN shall |
| implement the api ``sp_min_plat_fiq_handler()``. The default value is 0. |
| |
| - ``TRUSTED_BOARD_BOOT``: Boolean flag to include support for the Trusted Board |
| Boot feature. When set to '1', BL1 and BL2 images include support to load |
| and verify the certificates and images in a FIP, and BL1 includes support |
| for the Firmware Update. The default value is '0'. Generation and inclusion |
| of certificates in the FIP and FWU\_FIP depends upon the value of the |
| ``GENERATE_COT`` option. |
| |
| Note: This option depends on ``CREATE_KEYS`` to be enabled. If the keys |
| already exist in disk, they will be overwritten without further notice. |
| |
| - ``TRUSTED_WORLD_KEY``: This option is used when ``GENERATE_COT=1``. It |
| specifies the file that contains the Trusted World private key in PEM |
| format. If ``SAVE_KEYS=1``, this file name will be used to save the key. |
| |
| - ``TSP_INIT_ASYNC``: Choose BL32 initialization method as asynchronous or |
| synchronous, (see "Initializing a BL32 Image" section in |
| `Firmware Design`_). It can take the value 0 (BL32 is initialized using |
| synchronous method) or 1 (BL32 is initialized using asynchronous method). |
| Default is 0. |
| |
| - ``TSP_NS_INTR_ASYNC_PREEMPT``: A non zero value enables the interrupt |
| routing model which routes non-secure interrupts asynchronously from TSP |
| to EL3 causing immediate preemption of TSP. The EL3 is responsible |
| for saving and restoring the TSP context in this routing model. The |
| default routing model (when the value is 0) is to route non-secure |
| interrupts to TSP allowing it to save its context and hand over |
| synchronously to EL3 via an SMC. |
| |
| Note: when ``EL3_EXCEPTION_HANDLING`` is ``1``, ``TSP_NS_INTR_ASYNC_PREEMPT`` |
| must also be set to ``1``. |
| |
| - ``USE_COHERENT_MEM``: This flag determines whether to include the coherent |
| memory region in the BL memory map or not (see "Use of Coherent memory in |
| TF-A" section in `Firmware Design`_). It can take the value 1 |
| (Coherent memory region is included) or 0 (Coherent memory region is |
| excluded). Default is 1. |
| |
| - ``V``: Verbose build. If assigned anything other than 0, the build commands |
| are printed. Default is 0. |
| |
| - ``VERSION_STRING``: String used in the log output for each TF-A image. |
| Defaults to a string formed by concatenating the version number, build type |
| and build string. |
| |
| - ``WARMBOOT_ENABLE_DCACHE_EARLY`` : Boolean option to enable D-cache early on |
| the CPU after warm boot. This is applicable for platforms which do not |
| require interconnect programming to enable cache coherency (eg: single |
| cluster platforms). If this option is enabled, then warm boot path |
| enables D-caches immediately after enabling MMU. This option defaults to 0. |
| |
| Arm development platform specific build options |
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| |
| - ``ARM_BL31_IN_DRAM``: Boolean option to select loading of BL31 in TZC secured |
| DRAM. By default, BL31 is in the secure SRAM. Set this flag to 1 to load |
| BL31 in TZC secured DRAM. If TSP is present, then setting this option also |
| sets the TSP location to DRAM and ignores the ``ARM_TSP_RAM_LOCATION`` build |
| flag. |
| |
| - ``ARM_BOARD_OPTIMISE_MEM``: Boolean option to enable or disable optimisation |
| of the memory reserved for each image. This affects the maximum size of each |
| BL image as well as the number of allocated memory regions and translation |
| tables. By default this flag is 0, which means it uses the default |
| unoptimised values for these macros. Arm development platforms that wish to |
| optimise memory usage need to set this flag to 1 and must override the |
| related macros. |
| |
| - ``ARM_CONFIG_CNTACR``: boolean option to unlock access to the ``CNTBase<N>`` |
| frame registers by setting the ``CNTCTLBase.CNTACR<N>`` register bits. The |
| frame number ``<N>`` is defined by ``PLAT_ARM_NSTIMER_FRAME_ID``, which should |
| match the frame used by the Non-Secure image (normally the Linux kernel). |
| Default is true (access to the frame is allowed). |
| |
| - ``ARM_DISABLE_TRUSTED_WDOG``: boolean option to disable the Trusted Watchdog. |
| By default, Arm platforms use a watchdog to trigger a system reset in case |
| an error is encountered during the boot process (for example, when an image |
| could not be loaded or authenticated). The watchdog is enabled in the early |
| platform setup hook at BL1 and disabled in the BL1 prepare exit hook. The |
| Trusted Watchdog may be disabled at build time for testing or development |
| purposes. |
| |
| - ``ARM_LINUX_KERNEL_AS_BL33``: The Linux kernel expects registers x0-x3 to |
| have specific values at boot. This boolean option allows the Trusted Firmware |
| to have a Linux kernel image as BL33 by preparing the registers to these |
| values before jumping to BL33. This option defaults to 0 (disabled). For now, |
| it only supports AArch64 kernels. ``RESET_TO_BL31`` must be 1 when using it. |
| If this option is set to 1, ``ARM_PRELOADED_DTB_BASE`` must be set to the |
| location of a device tree blob (DTB) already loaded in memory. The Linux |
| Image address must be specified using the ``PRELOADED_BL33_BASE`` option. |
| |
| - ``ARM_RECOM_STATE_ID_ENC``: The PSCI1.0 specification recommends an encoding |
| for the construction of composite state-ID in the power-state parameter. |
| The existing PSCI clients currently do not support this encoding of |
| State-ID yet. Hence this flag is used to configure whether to use the |
| recommended State-ID encoding or not. The default value of this flag is 0, |
| in which case the platform is configured to expect NULL in the State-ID |
| field of power-state parameter. |
| |
| - ``ARM_ROTPK_LOCATION``: used when ``TRUSTED_BOARD_BOOT=1``. It specifies the |
| location of the ROTPK hash returned by the function ``plat_get_rotpk_info()`` |
| for Arm platforms. Depending on the selected option, the proper private key |
| must be specified using the ``ROT_KEY`` option when building the Trusted |
| Firmware. This private key will be used by the certificate generation tool |
| to sign the BL2 and Trusted Key certificates. Available options for |
| ``ARM_ROTPK_LOCATION`` are: |
| |
| - ``regs`` : return the ROTPK hash stored in the Trusted root-key storage |
| registers. The private key corresponding to this ROTPK hash is not |
| currently available. |
| - ``devel_rsa`` : return a development public key hash embedded in the BL1 |
| and BL2 binaries. This hash has been obtained from the RSA public key |
| ``arm_rotpk_rsa.der``, located in ``plat/arm/board/common/rotpk``. To use |
| this option, ``arm_rotprivk_rsa.pem`` must be specified as ``ROT_KEY`` when |
| creating the certificates. |
| - ``devel_ecdsa`` : return a development public key hash embedded in the BL1 |
| and BL2 binaries. This hash has been obtained from the ECDSA public key |
| ``arm_rotpk_ecdsa.der``, located in ``plat/arm/board/common/rotpk``. To use |
| this option, ``arm_rotprivk_ecdsa.pem`` must be specified as ``ROT_KEY`` |
| when creating the certificates. |
| |
| - ``ARM_TSP_RAM_LOCATION``: location of the TSP binary. Options: |
| |
| - ``tsram`` : Trusted SRAM (default option when TBB is not enabled) |
| - ``tdram`` : Trusted DRAM (if available) |
| - ``dram`` : Secure region in DRAM (default option when TBB is enabled, |
| configured by the TrustZone controller) |
| |
| - ``ARM_XLAT_TABLES_LIB_V1``: boolean option to compile TF-A with version 1 |
| of the translation tables library instead of version 2. It is set to 0 by |
| default, which selects version 2. |
| |
| - ``ARM_CRYPTOCELL_INTEG`` : bool option to enable TF-A to invoke Arm® |
| TrustZone® CryptoCell functionality for Trusted Board Boot on capable Arm |
| platforms. If this option is specified, then the path to the CryptoCell |
| SBROM library must be specified via ``CCSBROM_LIB_PATH`` flag. |
| |
| For a better understanding of these options, the Arm development platform memory |
| map is explained in the `Firmware Design`_. |
| |
| Arm CSS platform specific build options |
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| |
| - ``CSS_DETECT_PRE_1_7_0_SCP``: Boolean flag to detect SCP version |
| incompatibility. Version 1.7.0 of the SCP firmware made a non-backwards |
| compatible change to the MTL protocol, used for AP/SCP communication. |
| TF-A no longer supports earlier SCP versions. If this option is set to 1 |
| then TF-A will detect if an earlier version is in use. Default is 1. |
| |
| - ``CSS_LOAD_SCP_IMAGES``: Boolean flag, which when set, adds SCP\_BL2 and |
| SCP\_BL2U to the FIP and FWU\_FIP respectively, and enables them to be loaded |
| during boot. Default is 1. |
| |
| - ``CSS_USE_SCMI_SDS_DRIVER``: Boolean flag which selects SCMI/SDS drivers |
| instead of SCPI/BOM driver for communicating with the SCP during power |
| management operations and for SCP RAM Firmware transfer. If this option |
| is set to 1, then SCMI/SDS drivers will be used. Default is 0. |
| |
| Arm FVP platform specific build options |
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| |
| - ``FVP_CLUSTER_COUNT`` : Configures the cluster count to be used to |
| build the topology tree within TF-A. By default TF-A is configured for dual |
| cluster topology and this option can be used to override the default value. |
| |
| - ``FVP_INTERCONNECT_DRIVER``: Selects the interconnect driver to be built. The |
| default interconnect driver depends on the value of ``FVP_CLUSTER_COUNT`` as |
| explained in the options below: |
| |
| - ``FVP_CCI`` : The CCI driver is selected. This is the default |
| if 0 < ``FVP_CLUSTER_COUNT`` <= 2. |
| - ``FVP_CCN`` : The CCN driver is selected. This is the default |
| if ``FVP_CLUSTER_COUNT`` > 2. |
| |
| - ``FVP_MAX_CPUS_PER_CLUSTER``: Sets the maximum number of CPUs implemented in |
| a single cluster. This option defaults to 4. |
| |
| - ``FVP_MAX_PE_PER_CPU``: Sets the maximum number of PEs implemented on any CPU |
| in the system. This option defaults to 1. Note that the build option |
| ``ARM_PLAT_MT`` doesn't have any effect on FVP platforms. |
| |
| - ``FVP_USE_GIC_DRIVER`` : Selects the GIC driver to be built. Options: |
| |
| - ``FVP_GIC600`` : The GIC600 implementation of GICv3 is selected |
| - ``FVP_GICV2`` : The GICv2 only driver is selected |
| - ``FVP_GICV3`` : The GICv3 only driver is selected (default option) |
| - ``FVP_GICV3_LEGACY``: The Legacy GICv3 driver is selected (deprecated) |
| Note: If TF-A is compiled with this option on FVPs with GICv3 hardware, |
| then it configures the hardware to run in GICv2 emulation mode |
| |
| - ``FVP_USE_SP804_TIMER`` : Use the SP804 timer instead of the Generic Timer |
| for functions that wait for an arbitrary time length (udelay and mdelay). |
| The default value is 0. |
| |
| - ``FVP_HW_CONFIG_DTS`` : Specify the path to the DTS file to be compiled |
| to DTB and packaged in FIP as the HW_CONFIG. See `Firmware Design`_ for |
| details on HW_CONFIG. By default, this is initialized to a sensible DTS |
| file in ``fdts/`` folder depending on other build options. But some cases, |
| like shifted affinity format for MPIDR, cannot be detected at build time |
| and this option is needed to specify the appropriate DTS file. |
| |
| - ``FVP_HW_CONFIG`` : Specify the path to the HW_CONFIG blob to be packaged in |
| FIP. See `Firmware Design`_ for details on HW_CONFIG. This option is |
| similar to the ``FVP_HW_CONFIG_DTS`` option, but it directly specifies the |
| HW_CONFIG blob instead of the DTS file. This option is useful to override |
| the default HW_CONFIG selected by the build system. |
| |
| ARM JUNO platform specific build options |
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| |
| - ``JUNO_TZMP1`` : Boolean option to configure Juno to be used for TrustZone |
| Media Protection (TZ-MP1). Default value of this flag is 0. |
| |
| Debugging options |
| ~~~~~~~~~~~~~~~~~ |
| |
| To compile a debug version and make the build more verbose use |
| |
| :: |
| |
| make PLAT=<platform> DEBUG=1 V=1 all |
| |
| AArch64 GCC uses DWARF version 4 debugging symbols by default. Some tools (for |
| example DS-5) might not support this and may need an older version of DWARF |
| symbols to be emitted by GCC. This can be achieved by using the |
| ``-gdwarf-<version>`` flag, with the version being set to 2 or 3. Setting the |
| version to 2 is recommended for DS-5 versions older than 5.16. |
| |
| When debugging logic problems it might also be useful to disable all compiler |
| optimizations by using ``-O0``. |
| |
| NOTE: Using ``-O0`` could cause output images to be larger and base addresses |
| might need to be recalculated (see the **Memory layout on Arm development |
| platforms** section in the `Firmware Design`_). |
| |
| Extra debug options can be passed to the build system by setting ``CFLAGS`` or |
| ``LDFLAGS``: |
| |
| .. code:: makefile |
| |
| CFLAGS='-O0 -gdwarf-2' \ |
| make PLAT=<platform> DEBUG=1 V=1 all |
| |
| Note that using ``-Wl,`` style compilation driver options in ``CFLAGS`` will be |
| ignored as the linker is called directly. |
| |
| It is also possible to introduce an infinite loop to help in debugging the |
| post-BL2 phase of TF-A. This can be done by rebuilding BL1 with the |
| ``SPIN_ON_BL1_EXIT=1`` build flag. Refer to the `Summary of build options`_ |
| section. In this case, the developer may take control of the target using a |
| debugger when indicated by the console output. When using DS-5, the following |
| commands can be used: |
| |
| :: |
| |
| # Stop target execution |
| interrupt |
| |
| # |
| # Prepare your debugging environment, e.g. set breakpoints |
| # |
| |
| # Jump over the debug loop |
| set var $AARCH64::$Core::$PC = $AARCH64::$Core::$PC + 4 |
| |
| # Resume execution |
| continue |
| |
| Building the Test Secure Payload |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| The TSP is coupled with a companion runtime service in the BL31 firmware, |
| called the TSPD. Therefore, if you intend to use the TSP, the BL31 image |
| must be recompiled as well. For more information on SPs and SPDs, see the |
| `Secure-EL1 Payloads and Dispatchers`_ section in the `Firmware Design`_. |
| |
| First clean the TF-A build directory to get rid of any previous BL31 binary. |
| Then to build the TSP image use: |
| |
| :: |
| |
| make PLAT=<platform> SPD=tspd all |
| |
| An additional boot loader binary file is created in the ``build`` directory: |
| |
| :: |
| |
| build/<platform>/<build-type>/bl32.bin |
| |
| Checking source code style |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| When making changes to the source for submission to the project, the source |
| must be in compliance with the Linux style guide, and to assist with this check |
| the project Makefile contains two targets, which both utilise the |
| ``checkpatch.pl`` script that ships with the Linux source tree. |
| |
| To check the entire source tree, you must first download copies of |
| ``checkpatch.pl``, ``spelling.txt`` and ``const_structs.checkpatch`` available |
| in the `Linux master tree`_ scripts directory, then set the ``CHECKPATCH`` |
| environment variable to point to ``checkpatch.pl`` (with the other 2 files in |
| the same directory) and build the target |
| checkcodebase: |
| |
| :: |
| |
| make CHECKPATCH=<path-to-linux>/linux/scripts/checkpatch.pl checkcodebase |
| |
| To just check the style on the files that differ between your local branch and |
| the remote master, use: |
| |
| :: |
| |
| make CHECKPATCH=<path-to-linux>/linux/scripts/checkpatch.pl checkpatch |
| |
| If you wish to check your patch against something other than the remote master, |
| set the ``BASE_COMMIT`` variable to your desired branch. By default, ``BASE_COMMIT`` |
| is set to ``origin/master``. |
| |
| Building and using the FIP tool |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| Firmware Image Package (FIP) is a packaging format used by TF-A to package |
| firmware images in a single binary. The number and type of images that should |
| be packed in a FIP is platform specific and may include TF-A images and other |
| firmware images required by the platform. For example, most platforms require |
| a BL33 image which corresponds to the normal world bootloader (e.g. UEFI or |
| U-Boot). |
| |
| The TF-A build system provides the make target ``fip`` to create a FIP file |
| for the specified platform using the FIP creation tool included in the TF-A |
| project. Examples below show how to build a FIP file for FVP, packaging TF-A |
| and BL33 images. |
| |
| For AArch64: |
| |
| :: |
| |
| make PLAT=fvp BL33=<path/to/bl33.bin> fip |
| |
| For AArch32: |
| |
| :: |
| |
| make PLAT=fvp ARCH=aarch32 AARCH32_SP=sp_min BL33=<path/to/bl33.bin> fip |
| |
| Note that AArch32 support for Normal world boot loader (BL33), like U-boot or |
| UEFI, on FVP is not available upstream. Hence custom solutions are required to |
| allow Linux boot on FVP. These instructions assume such a custom boot loader |
| (BL33) is available. |
| |
| The resulting FIP may be found in: |
| |
| :: |
| |
| build/fvp/<build-type>/fip.bin |
| |
| For advanced operations on FIP files, it is also possible to independently build |
| the tool and create or modify FIPs using this tool. To do this, follow these |
| steps: |
| |
| It is recommended to remove old artifacts before building the tool: |
| |
| :: |
| |
| make -C tools/fiptool clean |
| |
| Build the tool: |
| |
| :: |
| |
| make [DEBUG=1] [V=1] fiptool |
| |
| The tool binary can be located in: |
| |
| :: |
| |
| ./tools/fiptool/fiptool |
| |
| Invoking the tool with ``--help`` will print a help message with all available |
| options. |
| |
| Example 1: create a new Firmware package ``fip.bin`` that contains BL2 and BL31: |
| |
| :: |
| |
| ./tools/fiptool/fiptool create \ |
| --tb-fw build/<platform>/<build-type>/bl2.bin \ |
| --soc-fw build/<platform>/<build-type>/bl31.bin \ |
| fip.bin |
| |
| Example 2: view the contents of an existing Firmware package: |
| |
| :: |
| |
| ./tools/fiptool/fiptool info <path-to>/fip.bin |
| |
| Example 3: update the entries of an existing Firmware package: |
| |
| :: |
| |
| # Change the BL2 from Debug to Release version |
| ./tools/fiptool/fiptool update \ |
| --tb-fw build/<platform>/release/bl2.bin \ |
| build/<platform>/debug/fip.bin |
| |
| Example 4: unpack all entries from an existing Firmware package: |
| |
| :: |
| |
| # Images will be unpacked to the working directory |
| ./tools/fiptool/fiptool unpack <path-to>/fip.bin |
| |
| Example 5: remove an entry from an existing Firmware package: |
| |
| :: |
| |
| ./tools/fiptool/fiptool remove \ |
| --tb-fw build/<platform>/debug/fip.bin |
| |
| Note that if the destination FIP file exists, the create, update and |
| remove operations will automatically overwrite it. |
| |
| The unpack operation will fail if the images already exist at the |
| destination. In that case, use -f or --force to continue. |
| |
| More information about FIP can be found in the `Firmware Design`_ document. |
| |
| Migrating from fip\_create to fiptool |
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| |
| The previous version of fiptool was called fip\_create. A compatibility script |
| that emulates the basic functionality of the previous fip\_create is provided. |
| However, users are strongly encouraged to migrate to fiptool. |
| |
| - To create a new FIP file, replace "fip\_create" with "fiptool create". |
| - To update a FIP file, replace "fip\_create" with "fiptool update". |
| - To dump the contents of a FIP file, replace "fip\_create --dump" |
| with "fiptool info". |
| |
| Building FIP images with support for Trusted Board Boot |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| Trusted Board Boot primarily consists of the following two features: |
| |
| - Image Authentication, described in `Trusted Board Boot`_, and |
| - Firmware Update, described in `Firmware Update`_ |
| |
| The following steps should be followed to build FIP and (optionally) FWU\_FIP |
| images with support for these features: |
| |
| #. Fulfill the dependencies of the ``mbedtls`` cryptographic and image parser |
| modules by checking out a recent version of the `mbed TLS Repository`_. It |
| is important to use a version that is compatible with TF-A and fixes any |
| known security vulnerabilities. See `mbed TLS Security Center`_ for more |
| information. The latest version of TF-A is tested with tag |
| ``mbedtls-2.6.0``. |
| |
| The ``drivers/auth/mbedtls/mbedtls_*.mk`` files contain the list of mbed TLS |
| source files the modules depend upon. |
| ``include/drivers/auth/mbedtls/mbedtls_config.h`` contains the configuration |
| options required to build the mbed TLS sources. |
| |
| Note that the mbed TLS library is licensed under the Apache version 2.0 |
| license. Using mbed TLS source code will affect the licensing of TF-A |
| binaries that are built using this library. |
| |
| #. To build the FIP image, ensure the following command line variables are set |
| while invoking ``make`` to build TF-A: |
| |
| - ``MBEDTLS_DIR=<path of the directory containing mbed TLS sources>`` |
| - ``TRUSTED_BOARD_BOOT=1`` |
| - ``GENERATE_COT=1`` |
| |
| In the case of Arm platforms, the location of the ROTPK hash must also be |
| specified at build time. Two locations are currently supported (see |
| ``ARM_ROTPK_LOCATION`` build option): |
| |
| - ``ARM_ROTPK_LOCATION=regs``: the ROTPK hash is obtained from the Trusted |
| root-key storage registers present in the platform. On Juno, this |
| registers are read-only. On FVP Base and Cortex models, the registers |
| are read-only, but the value can be specified using the command line |
| option ``bp.trusted_key_storage.public_key`` when launching the model. |
| On both Juno and FVP models, the default value corresponds to an |
| ECDSA-SECP256R1 public key hash, whose private part is not currently |
| available. |
| |
| - ``ARM_ROTPK_LOCATION=devel_rsa``: use the ROTPK hash that is hardcoded |
| in the Arm platform port. The private/public RSA key pair may be |
| found in ``plat/arm/board/common/rotpk``. |
| |
| - ``ARM_ROTPK_LOCATION=devel_ecdsa``: use the ROTPK hash that is hardcoded |
| in the Arm platform port. The private/public ECDSA key pair may be |
| found in ``plat/arm/board/common/rotpk``. |
| |
| Example of command line using RSA development keys: |
| |
| :: |
| |
| MBEDTLS_DIR=<path of the directory containing mbed TLS sources> \ |
| make PLAT=<platform> TRUSTED_BOARD_BOOT=1 GENERATE_COT=1 \ |
| ARM_ROTPK_LOCATION=devel_rsa \ |
| ROT_KEY=plat/arm/board/common/rotpk/arm_rotprivk_rsa.pem \ |
| BL33=<path-to>/<bl33_image> \ |
| all fip |
| |
| The result of this build will be the bl1.bin and the fip.bin binaries. This |
| FIP will include the certificates corresponding to the Chain of Trust |
| described in the TBBR-client document. These certificates can also be found |
| in the output build directory. |
| |
| #. The optional FWU\_FIP contains any additional images to be loaded from |
| Non-Volatile storage during the `Firmware Update`_ process. To build the |
| FWU\_FIP, any FWU images required by the platform must be specified on the |
| command line. On Arm development platforms like Juno, these are: |
| |
| - NS\_BL2U. The AP non-secure Firmware Updater image. |
| - SCP\_BL2U. The SCP Firmware Update Configuration image. |
| |
| Example of Juno command line for generating both ``fwu`` and ``fwu_fip`` |
| targets using RSA development: |
| |
| :: |
| |
| MBEDTLS_DIR=<path of the directory containing mbed TLS sources> \ |
| make PLAT=juno TRUSTED_BOARD_BOOT=1 GENERATE_COT=1 \ |
| ARM_ROTPK_LOCATION=devel_rsa \ |
| ROT_KEY=plat/arm/board/common/rotpk/arm_rotprivk_rsa.pem \ |
| BL33=<path-to>/<bl33_image> \ |
| SCP_BL2=<path-to>/<scp_bl2_image> \ |
| SCP_BL2U=<path-to>/<scp_bl2u_image> \ |
| NS_BL2U=<path-to>/<ns_bl2u_image> \ |
| all fip fwu_fip |
| |
| Note: The BL2U image will be built by default and added to the FWU\_FIP. |
| The user may override this by adding ``BL2U=<path-to>/<bl2u_image>`` |
| to the command line above. |
| |
| Note: Building and installing the non-secure and SCP FWU images (NS\_BL1U, |
| NS\_BL2U and SCP\_BL2U) is outside the scope of this document. |
| |
| The result of this build will be bl1.bin, fip.bin and fwu\_fip.bin binaries. |
| Both the FIP and FWU\_FIP will include the certificates corresponding to the |
| Chain of Trust described in the TBBR-client document. These certificates |
| can also be found in the output build directory. |
| |
| Building the Certificate Generation Tool |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| The ``cert_create`` tool is built as part of the TF-A build process when the |
| ``fip`` make target is specified and TBB is enabled (as described in the |
| previous section), but it can also be built separately with the following |
| command: |
| |
| :: |
| |
| make PLAT=<platform> [DEBUG=1] [V=1] certtool |
| |
| For platforms that do not require their own IDs in certificate files, |
| the generic 'cert\_create' tool can be built with the following command: |
| |
| :: |
| |
| make USE_TBBR_DEFS=1 [DEBUG=1] [V=1] certtool |
| |
| ``DEBUG=1`` builds the tool in debug mode. ``V=1`` makes the build process more |
| verbose. The following command should be used to obtain help about the tool: |
| |
| :: |
| |
| ./tools/cert_create/cert_create -h |
| |
| Building a FIP for Juno and FVP |
| ------------------------------- |
| |
| This section provides Juno and FVP specific instructions to build Trusted |
| Firmware, obtain the additional required firmware, and pack it all together in |
| a single FIP binary. It assumes that a `Linaro Release`_ has been installed. |
| |
| Note: Pre-built binaries for AArch32 are available from Linaro Release 16.12 |
| onwards. Before that release, pre-built binaries are only available for AArch64. |
| |
| Note: Follow the full instructions for one platform before switching to a |
| different one. Mixing instructions for different platforms may result in |
| corrupted binaries. |
| |
| Note: The uboot image downloaded by the Linaro workspace script does not always |
| match the uboot image packaged as BL33 in the corresponding fip file. It is |
| recommended to use the version that is packaged in the fip file using the |
| instructions below. |
| |
| Note: For the FVP, the kernel FDT is packaged in FIP during build and loaded |
| by the firmware at runtime. See `Obtaining the Flattened Device Trees`_ |
| section for more info on selecting the right FDT to use. |
| |
| #. Clean the working directory |
| |
| :: |
| |
| make realclean |
| |
| #. Obtain SCP\_BL2 (Juno) and BL33 (all platforms) |
| |
| Use the fiptool to extract the SCP\_BL2 and BL33 images from the FIP |
| package included in the Linaro release: |
| |
| :: |
| |
| # Build the fiptool |
| make [DEBUG=1] [V=1] fiptool |
| |
| # Unpack firmware images from Linaro FIP |
| ./tools/fiptool/fiptool unpack \ |
| <path/to/linaro/release>/fip.bin |
| |
| The unpack operation will result in a set of binary images extracted to the |
| current working directory. The SCP\_BL2 image corresponds to |
| ``scp-fw.bin`` and BL33 corresponds to ``nt-fw.bin``. |
| |
| Note: The fiptool will complain if the images to be unpacked already |
| exist in the current directory. If that is the case, either delete those |
| files or use the ``--force`` option to overwrite. |
| |
| Note: For AArch32, the instructions below assume that nt-fw.bin is a custom |
| Normal world boot loader that supports AArch32. |
| |
| #. Build TF-A images and create a new FIP for FVP |
| |
| :: |
| |
| # AArch64 |
| make PLAT=fvp BL33=nt-fw.bin all fip |
| |
| # AArch32 |
| make PLAT=fvp ARCH=aarch32 AARCH32_SP=sp_min BL33=nt-fw.bin all fip |
| |
| #. Build TF-A images and create a new FIP for Juno |
| |
| For AArch64: |
| |
| Building for AArch64 on Juno simply requires the addition of ``SCP_BL2`` |
| as a build parameter. |
| |
| :: |
| |
| make PLAT=juno all fip \ |
| BL33=<path-to-juno-oe-uboot>/SOFTWARE/bl33-uboot.bin \ |
| SCP_BL2=<path-to-juno-busybox-uboot>/SOFTWARE/scp_bl2.bin |
| |
| For AArch32: |
| |
| Hardware restrictions on Juno prevent cold reset into AArch32 execution mode, |
| therefore BL1 and BL2 must be compiled for AArch64, and BL32 is compiled |
| separately for AArch32. |
| |
| - Before building BL32, the environment variable ``CROSS_COMPILE`` must point |
| to the AArch32 Linaro cross compiler. |
| |
| :: |
| |
| export CROSS_COMPILE=<path-to-aarch32-gcc>/bin/arm-linux-gnueabihf- |
| |
| - Build BL32 in AArch32. |
| |
| :: |
| |
| make ARCH=aarch32 PLAT=juno AARCH32_SP=sp_min \ |
| RESET_TO_SP_MIN=1 JUNO_AARCH32_EL3_RUNTIME=1 bl32 |
| |
| - Before building BL1 and BL2, the environment variable ``CROSS_COMPILE`` |
| must point to the AArch64 Linaro cross compiler. |
| |
| :: |
| |
| export CROSS_COMPILE=<path-to-aarch64-gcc>/bin/aarch64-linux-gnu- |
| |
| - The following parameters should be used to build BL1 and BL2 in AArch64 |
| and point to the BL32 file. |
| |
| :: |
| |
| make ARCH=aarch64 PLAT=juno LOAD_IMAGE_V2=1 JUNO_AARCH32_EL3_RUNTIME=1 \ |
| BL33=<path-to-juno32-oe-uboot>/SOFTWARE/bl33-uboot.bin \ |
| SCP_BL2=<path-to-juno32-oe-uboot>/SOFTWARE/scp_bl2.bin \ |
| BL32=<path-to-bl32>/bl32.bin all fip |
| |
| The resulting BL1 and FIP images may be found in: |
| |
| :: |
| |
| # Juno |
| ./build/juno/release/bl1.bin |
| ./build/juno/release/fip.bin |
| |
| # FVP |
| ./build/fvp/release/bl1.bin |
| ./build/fvp/release/fip.bin |
| |
| |
| Booting Firmware Update images |
| ------------------------------------- |
| |
| When Firmware Update (FWU) is enabled there are at least 2 new images |
| that have to be loaded, the Non-Secure FWU ROM (NS-BL1U), and the |
| FWU FIP. |
| |
| Juno |
| ~~~~ |
| |
| The new images must be programmed in flash memory by adding |
| an entry in the ``SITE1/HBI0262x/images.txt`` configuration file |
| on the Juno SD card (where ``x`` depends on the revision of the Juno board). |
| Refer to the `Juno Getting Started Guide`_, section 2.3 "Flash memory |
| programming" for more information. User should ensure these do not |
| overlap with any other entries in the file. |
| |
| :: |
| |
| NOR10UPDATE: AUTO ;Image Update:NONE/AUTO/FORCE |
| NOR10ADDRESS: 0x00400000 ;Image Flash Address [ns_bl2u_base_address] |
| NOR10FILE: \SOFTWARE\fwu_fip.bin ;Image File Name |
| NOR10LOAD: 00000000 ;Image Load Address |
| NOR10ENTRY: 00000000 ;Image Entry Point |
| |
| NOR11UPDATE: AUTO ;Image Update:NONE/AUTO/FORCE |
| NOR11ADDRESS: 0x03EB8000 ;Image Flash Address [ns_bl1u_base_address] |
| NOR11FILE: \SOFTWARE\ns_bl1u.bin ;Image File Name |
| NOR11LOAD: 00000000 ;Image Load Address |
| |
| The address ns_bl1u_base_address is the value of NS_BL1U_BASE - 0x8000000. |
| In the same way, the address ns_bl2u_base_address is the value of |
| NS_BL2U_BASE - 0x8000000. |
| |
| FVP |
| ~~~ |
| |
| The additional fip images must be loaded with: |
| |
| :: |
| |
| --data cluster0.cpu0="<path_to>/ns_bl1u.bin"@0x0beb8000 [ns_bl1u_base_address] |
| --data cluster0.cpu0="<path_to>/fwu_fip.bin"@0x08400000 [ns_bl2u_base_address] |
| |
| The address ns_bl1u_base_address is the value of NS_BL1U_BASE. |
| In the same way, the address ns_bl2u_base_address is the value of |
| NS_BL2U_BASE. |
| |
| |
| EL3 payloads alternative boot flow |
| ---------------------------------- |
| |
| On a pre-production system, the ability to execute arbitrary, bare-metal code at |
| the highest exception level is required. It allows full, direct access to the |
| hardware, for example to run silicon soak tests. |
| |
| Although it is possible to implement some baremetal secure firmware from |
| scratch, this is a complex task on some platforms, depending on the level of |
| configuration required to put the system in the expected state. |
| |
| Rather than booting a baremetal application, a possible compromise is to boot |
| ``EL3 payloads`` through TF-A instead. This is implemented as an alternative |
| boot flow, where a modified BL2 boots an EL3 payload, instead of loading the |
| other BL images and passing control to BL31. It reduces the complexity of |
| developing EL3 baremetal code by: |
| |
| - putting the system into a known architectural state; |
| - taking care of platform secure world initialization; |
| - loading the SCP\_BL2 image if required by the platform. |
| |
| When booting an EL3 payload on Arm standard platforms, the configuration of the |
| TrustZone controller is simplified such that only region 0 is enabled and is |
| configured to permit secure access only. This gives full access to the whole |
| DRAM to the EL3 payload. |
| |
| The system is left in the same state as when entering BL31 in the default boot |
| flow. In particular: |
| |
| - Running in EL3; |
| - Current state is AArch64; |
| - Little-endian data access; |
| - All exceptions disabled; |
| - MMU disabled; |
| - Caches disabled. |
| |
| Booting an EL3 payload |
| ~~~~~~~~~~~~~~~~~~~~~~ |
| |
| The EL3 payload image is a standalone image and is not part of the FIP. It is |
| not loaded by TF-A. Therefore, there are 2 possible scenarios: |
| |
| - The EL3 payload may reside in non-volatile memory (NVM) and execute in |
| place. In this case, booting it is just a matter of specifying the right |
| address in NVM through ``EL3_PAYLOAD_BASE`` when building TF-A. |
| |
| - The EL3 payload needs to be loaded in volatile memory (e.g. DRAM) at |
| run-time. |
| |
| To help in the latter scenario, the ``SPIN_ON_BL1_EXIT=1`` build option can be |
| used. The infinite loop that it introduces in BL1 stops execution at the right |
| moment for a debugger to take control of the target and load the payload (for |
| example, over JTAG). |
| |
| It is expected that this loading method will work in most cases, as a debugger |
| connection is usually available in a pre-production system. The user is free to |
| use any other platform-specific mechanism to load the EL3 payload, though. |
| |
| Booting an EL3 payload on FVP |
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| |
| The EL3 payloads boot flow requires the CPU's mailbox to be cleared at reset for |
| the secondary CPUs holding pen to work properly. Unfortunately, its reset value |
| is undefined on the FVP platform and the FVP platform code doesn't clear it. |
| Therefore, one must modify the way the model is normally invoked in order to |
| clear the mailbox at start-up. |
| |
| One way to do that is to create an 8-byte file containing all zero bytes using |
| the following command: |
| |
| :: |
| |
| dd if=/dev/zero of=mailbox.dat bs=1 count=8 |
| |
| and pre-load it into the FVP memory at the mailbox address (i.e. ``0x04000000``) |
| using the following model parameters: |
| |
| :: |
| |
| --data cluster0.cpu0=mailbox.dat@0x04000000 [Base FVPs] |
| --data=mailbox.dat@0x04000000 [Foundation FVP] |
| |
| To provide the model with the EL3 payload image, the following methods may be |
| used: |
| |
| #. If the EL3 payload is able to execute in place, it may be programmed into |
| flash memory. On Base Cortex and AEM FVPs, the following model parameter |
| loads it at the base address of the NOR FLASH1 (the NOR FLASH0 is already |
| used for the FIP): |
| |
| :: |
| |
| -C bp.flashloader1.fname="/path/to/el3-payload" |
| |
| On Foundation FVP, there is no flash loader component and the EL3 payload |
| may be programmed anywhere in flash using method 3 below. |
| |
| #. When using the ``SPIN_ON_BL1_EXIT=1`` loading method, the following DS-5 |
| command may be used to load the EL3 payload ELF image over JTAG: |
| |
| :: |
| |
| load /path/to/el3-payload.elf |
| |
| #. The EL3 payload may be pre-loaded in volatile memory using the following |
| model parameters: |
| |
| :: |
| |
| --data cluster0.cpu0="/path/to/el3-payload"@address [Base FVPs] |
| --data="/path/to/el3-payload"@address [Foundation FVP] |
| |
| The address provided to the FVP must match the ``EL3_PAYLOAD_BASE`` address |
| used when building TF-A. |
| |
| Booting an EL3 payload on Juno |
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| |
| If the EL3 payload is able to execute in place, it may be programmed in flash |
| memory by adding an entry in the ``SITE1/HBI0262x/images.txt`` configuration file |
| on the Juno SD card (where ``x`` depends on the revision of the Juno board). |
| Refer to the `Juno Getting Started Guide`_, section 2.3 "Flash memory |
| programming" for more information. |
| |
| Alternatively, the same DS-5 command mentioned in the FVP section above can |
| be used to load the EL3 payload's ELF file over JTAG on Juno. |
| |
| Preloaded BL33 alternative boot flow |
| ------------------------------------ |
| |
| Some platforms have the ability to preload BL33 into memory instead of relying |
| on TF-A to load it. This may simplify packaging of the normal world code and |
| improve performance in a development environment. When secure world cold boot |
| is complete, TF-A simply jumps to a BL33 base address provided at build time. |
| |
| For this option to be used, the ``PRELOADED_BL33_BASE`` build option has to be |
| used when compiling TF-A. For example, the following command will create a FIP |
| without a BL33 and prepare to jump to a BL33 image loaded at address |
| 0x80000000: |
| |
| :: |
| |
| make PRELOADED_BL33_BASE=0x80000000 PLAT=fvp all fip |
| |
| Boot of a preloaded kernel image on Base FVP |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| The following example uses a simplified boot flow by directly jumping from the |
| TF-A to the Linux kernel, which will use a ramdisk as filesystem. This can be |
| useful if both the kernel and the device tree blob (DTB) are already present in |
| memory (like in FVP). |
| |
| For example, if the kernel is loaded at ``0x80080000`` and the DTB is loaded at |
| address ``0x82000000``, the firmware can be built like this: |
| |
| :: |
| |
| CROSS_COMPILE=aarch64-linux-gnu- \ |
| make PLAT=fvp DEBUG=1 \ |
| RESET_TO_BL31=1 \ |
| ARM_LINUX_KERNEL_AS_BL33=1 \ |
| PRELOADED_BL33_BASE=0x80080000 \ |
| ARM_PRELOADED_DTB_BASE=0x82000000 \ |
| all fip |
| |
| Now, it is needed to modify the DTB so that the kernel knows the address of the |
| ramdisk. The following script generates a patched DTB from the provided one, |
| assuming that the ramdisk is loaded at address ``0x84000000``. Note that this |
| script assumes that the user is using a ramdisk image prepared for U-Boot, like |
| the ones provided by Linaro. If using a ramdisk without this header,the ``0x40`` |
| offset in ``INITRD_START`` has to be removed. |
| |
| .. code:: bash |
| |
| #!/bin/bash |
| |
| # Path to the input DTB |
| KERNEL_DTB=<path-to>/<fdt> |
| # Path to the output DTB |
| PATCHED_KERNEL_DTB=<path-to>/<patched-fdt> |
| # Base address of the ramdisk |
| INITRD_BASE=0x84000000 |
| # Path to the ramdisk |
| INITRD=<path-to>/<ramdisk.img> |
| |
| # Skip uboot header (64 bytes) |
| INITRD_START=$(printf "0x%x" $((${INITRD_BASE} + 0x40)) ) |
| INITRD_SIZE=$(stat -Lc %s ${INITRD}) |
| INITRD_END=$(printf "0x%x" $((${INITRD_BASE} + ${INITRD_SIZE})) ) |
| |
| CHOSEN_NODE=$(echo \ |
| "/ { \ |
| chosen { \ |
| linux,initrd-start = <${INITRD_START}>; \ |
| linux,initrd-end = <${INITRD_END}>; \ |
| }; \ |
| };") |
| |
| echo $(dtc -O dts -I dtb ${KERNEL_DTB}) ${CHOSEN_NODE} | \ |
| dtc -O dtb -o ${PATCHED_KERNEL_DTB} - |
| |
| And the FVP binary can be run with the following command: |
| |
| :: |
| |
| <path-to>/FVP_Base_AEMv8A-AEMv8A \ |
| -C pctl.startup=0.0.0.0 \ |
| -C bp.secure_memory=1 \ |
| -C cluster0.NUM_CORES=4 \ |
| -C cluster1.NUM_CORES=4 \ |
| -C cache_state_modelled=1 \ |
| -C cluster0.cpu0.RVBAR=0x04020000 \ |
| -C cluster0.cpu1.RVBAR=0x04020000 \ |
| -C cluster0.cpu2.RVBAR=0x04020000 \ |
| -C cluster0.cpu3.RVBAR=0x04020000 \ |
| -C cluster1.cpu0.RVBAR=0x04020000 \ |
| -C cluster1.cpu1.RVBAR=0x04020000 \ |
| -C cluster1.cpu2.RVBAR=0x04020000 \ |
| -C cluster1.cpu3.RVBAR=0x04020000 \ |
| --data cluster0.cpu0="<path-to>/bl31.bin"@0x04020000 \ |
| --data cluster0.cpu0="<path-to>/<patched-fdt>"@0x82000000 \ |
| --data cluster0.cpu0="<path-to>/<kernel-binary>"@0x80080000 \ |
| --data cluster0.cpu0="<path-to>/<ramdisk.img>"@0x84000000 |
| |
| Boot of a preloaded kernel image on Juno |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| The Trusted Firmware must be compiled in a similar way as for FVP explained |
| above. The process to load binaries to memory is the one explained in |
| `Booting an EL3 payload on Juno`_. |
| |
| Running the software on FVP |
| --------------------------- |
| |
| The latest version of the AArch64 build of TF-A has been tested on the following |
| Arm FVPs without shifted affinities, and that do not support threaded CPU cores |
| (64-bit host machine only). |
| |
| NOTE: Unless otherwise stated, the model version is Version 11.2 Build 11.2.33. |
| |
| - ``Foundation_Platform`` |
| - ``FVP_Base_AEMv8A-AEMv8A`` (and also Version 9.0, Build 0.8.9005) |
| - ``FVP_Base_Cortex-A35x4`` |
| - ``FVP_Base_Cortex-A53x4`` |
| - ``FVP_Base_Cortex-A57x4-A53x4`` |
| - ``FVP_Base_Cortex-A57x4`` |
| - ``FVP_Base_Cortex-A72x4-A53x4`` |
| - ``FVP_Base_Cortex-A72x4`` |
| - ``FVP_Base_Cortex-A73x4-A53x4`` |
| - ``FVP_Base_Cortex-A73x4`` |
| |
| Additionally, the AArch64 build was tested on the following Arm FVPs with |
| shifted affinities, supporting threaded CPU cores (64-bit host machine only). |
| |
| - ``FVP_Base_Cortex-A55x4-A75x4`` (Version 0.0, build 0.0.4395) |
| - ``FVP_Base_Cortex-A55x4`` (Version 0.0, build 0.0.4395) |
| - ``FVP_Base_Cortex-A75x4`` (Version 0.0, build 0.0.4395) |
| - ``FVP_Base_RevC-2xAEMv8A`` |
| |
| The latest version of the AArch32 build of TF-A has been tested on the following |
| Arm FVPs without shifted affinities, and that do not support threaded CPU cores |
| (64-bit host machine only). |
| |
| - ``FVP_Base_AEMv8A-AEMv8A`` |
| - ``FVP_Base_Cortex-A32x4`` |
| |
| NOTE: The ``FVP_Base_RevC-2xAEMv8A`` FVP only supports shifted affinities, which |
| is not compatible with legacy GIC configurations. Therefore this FVP does not |
| support these legacy GIC configurations. |
| |
| NOTE: The build numbers quoted above are those reported by launching the FVP |
| with the ``--version`` parameter. |
| |
| NOTE: Linaro provides a ramdisk image in prebuilt FVP configurations and full |
| file systems that can be downloaded separately. To run an FVP with a virtio |
| file system image an additional FVP configuration option |
| ``-C bp.virtioblockdevice.image_path="<path-to>/<file-system-image>`` can be |
| used. |
| |
| NOTE: The software will not work on Version 1.0 of the Foundation FVP. |
| The commands below would report an ``unhandled argument`` error in this case. |
| |
| NOTE: FVPs can be launched with ``--cadi-server`` option such that a |
| CADI-compliant debugger (for example, Arm DS-5) can connect to and control its |
| execution. |
| |
| NOTE: Since FVP model Version 11.0 Build 11.0.34 and Version 8.5 Build 0.8.5202 |
| the internal synchronisation timings changed compared to older versions of the |
| models. The models can be launched with ``-Q 100`` option if they are required |
| to match the run time characteristics of the older versions. |
| |
| The Foundation FVP is a cut down version of the AArch64 Base FVP. It can be |
| downloaded for free from `Arm's website`_. |
| |
| The Cortex-A models listed above are also available to download from |
| `Arm's website`_. |
| |
| Please refer to the FVP documentation for a detailed description of the model |
| parameter options. A brief description of the important ones that affect TF-A |
| and normal world software behavior is provided below. |
| |
| Obtaining the Flattened Device Trees |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| Depending on the FVP configuration and Linux configuration used, different |
| FDT files are required. FDT source files for the Foundation and Base FVPs can |
| be found in the TF-A source directory under ``fdts/``. The Foundation FVP has |
| a subset of the Base FVP components. For example, the Foundation FVP lacks |
| CLCD and MMC support, and has only one CPU cluster. |
| |
| Note: It is not recommended to use the FDTs built along the kernel because not |
| all FDTs are available from there. |
| |
| The dynamic configuration capability is enabled in the firmware for FVPs. |
| This means that the firmware can authenticate and load the FDT if present in |
| FIP. A default FDT is packaged into FIP during the build based on |
| the build configuration. This can be overridden by using the ``FVP_HW_CONFIG`` |
| or ``FVP_HW_CONFIG_DTS`` build options (refer to the |
| `Arm FVP platform specific build options`_ section for detail on the options). |
| |
| - ``fvp-base-gicv2-psci.dts`` |
| |
| For use with models such as the Cortex-A57-A53 Base FVPs without shifted |
| affinities and with Base memory map configuration. |
| |
| - ``fvp-base-gicv2-psci-aarch32.dts`` |
| |
| For use with models such as the Cortex-A32 Base FVPs without shifted |
| affinities and running Linux in AArch32 state with Base memory map |
| configuration. |
| |
| - ``fvp-base-gicv3-psci.dts`` |
| |
| For use with models such as the Cortex-A57-A53 Base FVPs without shifted |
| affinities and with Base memory map configuration and Linux GICv3 support. |
| |
| - ``fvp-base-gicv3-psci-1t.dts`` |
| |
| For use with models such as the AEMv8-RevC Base FVP with shifted affinities, |
| single threaded CPUs, Base memory map configuration and Linux GICv3 support. |
| |
| - ``fvp-base-gicv3-psci-dynamiq.dts`` |
| |
| For use with models as the Cortex-A55-A75 Base FVPs with shifted affinities, |
| single cluster, single threaded CPUs, Base memory map configuration and Linux |
| GICv3 support. |
| |
| - ``fvp-base-gicv3-psci-aarch32.dts`` |
| |
| For use with models such as the Cortex-A32 Base FVPs without shifted |
| affinities and running Linux in AArch32 state with Base memory map |
| configuration and Linux GICv3 support. |
| |
| - ``fvp-foundation-gicv2-psci.dts`` |
| |
| For use with Foundation FVP with Base memory map configuration. |
| |
| - ``fvp-foundation-gicv3-psci.dts`` |
| |
| (Default) For use with Foundation FVP with Base memory map configuration |
| and Linux GICv3 support. |
| |
| Running on the Foundation FVP with reset to BL1 entrypoint |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| The following ``Foundation_Platform`` parameters should be used to boot Linux with |
| 4 CPUs using the AArch64 build of TF-A. |
| |
| :: |
| |
| <path-to>/Foundation_Platform \ |
| --cores=4 \ |
| --arm-v8.0 \ |
| --secure-memory \ |
| --visualization \ |
| --gicv3 \ |
| --data="<path-to>/<bl1-binary>"@0x0 \ |
| --data="<path-to>/<FIP-binary>"@0x08000000 \ |
| --data="<path-to>/<kernel-binary>"@0x80080000 \ |
| --data="<path-to>/<ramdisk-binary>"@0x84000000 |
| |
| Notes: |
| |
| - BL1 is loaded at the start of the Trusted ROM. |
| - The Firmware Image Package is loaded at the start of NOR FLASH0. |
| - The firmware loads the FDT packaged in FIP to the DRAM. The FDT load address |
| is specified via the ``hw_config_addr`` property in `TB_FW_CONFIG for FVP`_. |
| - The default use-case for the Foundation FVP is to use the ``--gicv3`` option |
| and enable the GICv3 device in the model. Note that without this option, |
| the Foundation FVP defaults to legacy (Versatile Express) memory map which |
| is not supported by TF-A. |
| - In order for TF-A to run correctly on the Foundation FVP, the architecture |
| versions must match. The Foundation FVP defaults to the highest v8.x |
| version it supports but the default build for TF-A is for v8.0. To avoid |
| issues either start the Foundation FVP to use v8.0 architecture using the |
| ``--arm-v8.0`` option, or build TF-A with an appropriate value for |
| ``ARM_ARCH_MINOR``. |
| |
| Running on the AEMv8 Base FVP with reset to BL1 entrypoint |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| The following ``FVP_Base_RevC-2xAEMv8A`` parameters should be used to boot Linux |
| with 8 CPUs using the AArch64 build of TF-A. |
| |
| :: |
| |
| <path-to>/FVP_Base_RevC-2xAEMv8A \ |
| -C pctl.startup=0.0.0.0 \ |
| -C bp.secure_memory=1 \ |
| -C bp.tzc_400.diagnostics=1 \ |
| -C cluster0.NUM_CORES=4 \ |
| -C cluster1.NUM_CORES=4 \ |
| -C cache_state_modelled=1 \ |
| -C bp.secureflashloader.fname="<path-to>/<bl1-binary>" \ |
| -C bp.flashloader0.fname="<path-to>/<FIP-binary>" \ |
| --data cluster0.cpu0="<path-to>/<kernel-binary>"@0x80080000 \ |
| --data cluster0.cpu0="<path-to>/<ramdisk>"@0x84000000 |
| |
| Running on the AEMv8 Base FVP (AArch32) with reset to BL1 entrypoint |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| The following ``FVP_Base_AEMv8A-AEMv8A`` parameters should be used to boot Linux |
| with 8 CPUs using the AArch32 build of TF-A. |
| |
| :: |
| |
| <path-to>/FVP_Base_AEMv8A-AEMv8A \ |
| -C pctl.startup=0.0.0.0 \ |
| -C bp.secure_memory=1 \ |
| -C bp.tzc_400.diagnostics=1 \ |
| -C cluster0.NUM_CORES=4 \ |
| -C cluster1.NUM_CORES=4 \ |
| -C cache_state_modelled=1 \ |
| -C cluster0.cpu0.CONFIG64=0 \ |
| -C cluster0.cpu1.CONFIG64=0 \ |
| -C cluster0.cpu2.CONFIG64=0 \ |
| -C cluster0.cpu3.CONFIG64=0 \ |
| -C cluster1.cpu0.CONFIG64=0 \ |
| -C cluster1.cpu1.CONFIG64=0 \ |
| -C cluster1.cpu2.CONFIG64=0 \ |
| -C cluster1.cpu3.CONFIG64=0 \ |
| -C bp.secureflashloader.fname="<path-to>/<bl1-binary>" \ |
| -C bp.flashloader0.fname="<path-to>/<FIP-binary>" \ |
| --data cluster0.cpu0="<path-to>/<kernel-binary>"@0x80080000 \ |
| --data cluster0.cpu0="<path-to>/<ramdisk>"@0x84000000 |
| |
| Running on the Cortex-A57-A53 Base FVP with reset to BL1 entrypoint |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| The following ``FVP_Base_Cortex-A57x4-A53x4`` model parameters should be used to |
| boot Linux with 8 CPUs using the AArch64 build of TF-A. |
| |
| :: |
| |
| <path-to>/FVP_Base_Cortex-A57x4-A53x4 \ |
| -C pctl.startup=0.0.0.0 \ |
| -C bp.secure_memory=1 \ |
| -C bp.tzc_400.diagnostics=1 \ |
| -C cache_state_modelled=1 \ |
| -C bp.secureflashloader.fname="<path-to>/<bl1-binary>" \ |
| -C bp.flashloader0.fname="<path-to>/<FIP-binary>" \ |
| --data cluster0.cpu0="<path-to>/<kernel-binary>"@0x80080000 \ |
| --data cluster0.cpu0="<path-to>/<ramdisk>"@0x84000000 |
| |
| Running on the Cortex-A32 Base FVP (AArch32) with reset to BL1 entrypoint |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| The following ``FVP_Base_Cortex-A32x4`` model parameters should be used to |
| boot Linux with 4 CPUs using the AArch32 build of TF-A. |
| |
| :: |
| |
| <path-to>/FVP_Base_Cortex-A32x4 \ |
| -C pctl.startup=0.0.0.0 \ |
| -C bp.secure_memory=1 \ |
| -C bp.tzc_400.diagnostics=1 \ |
| -C cache_state_modelled=1 \ |
| -C bp.secureflashloader.fname="<path-to>/<bl1-binary>" \ |
| -C bp.flashloader0.fname="<path-to>/<FIP-binary>" \ |
| --data cluster0.cpu0="<path-to>/<kernel-binary>"@0x80080000 \ |
| --data cluster0.cpu0="<path-to>/<ramdisk>"@0x84000000 |
| |
| Running on the AEMv8 Base FVP with reset to BL31 entrypoint |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| The following ``FVP_Base_RevC-2xAEMv8A`` parameters should be used to boot Linux |
| with 8 CPUs using the AArch64 build of TF-A. |
| |
| :: |
| |
| <path-to>/FVP_Base_RevC-2xAEMv8A \ |
| -C pctl.startup=0.0.0.0 \ |
| -C bp.secure_memory=1 \ |
| -C bp.tzc_400.diagnostics=1 \ |
| -C cluster0.NUM_CORES=4 \ |
| -C cluster1.NUM_CORES=4 \ |
| -C cache_state_modelled=1 \ |
| -C cluster0.cpu0.RVBAR=0x04020000 \ |
| -C cluster0.cpu1.RVBAR=0x04020000 \ |
| -C cluster0.cpu2.RVBAR=0x04020000 \ |
| -C cluster0.cpu3.RVBAR=0x04020000 \ |
| -C cluster1.cpu0.RVBAR=0x04020000 \ |
| -C cluster1.cpu1.RVBAR=0x04020000 \ |
| -C cluster1.cpu2.RVBAR=0x04020000 \ |
| -C cluster1.cpu3.RVBAR=0x04020000 \ |
| --data cluster0.cpu0="<path-to>/<bl31-binary>"@0x04020000 \ |
| --data cluster0.cpu0="<path-to>/<bl32-binary>"@0x04001000 \ |
| --data cluster0.cpu0="<path-to>/<bl33-binary>"@0x88000000 \ |
| --data cluster0.cpu0="<path-to>/<fdt>"@0x82000000 \ |
| --data cluster0.cpu0="<path-to>/<kernel-binary>"@0x80080000 \ |
| --data cluster0.cpu0="<path-to>/<ramdisk>"@0x84000000 |
| |
| Notes: |
| |
| - Since a FIP is not loaded when using BL31 as reset entrypoint, the |
| ``--data="<path-to><bl31|bl32|bl33-binary>"@<base-address-of-binary>`` |
| parameter is needed to load the individual bootloader images in memory. |
| BL32 image is only needed if BL31 has been built to expect a Secure-EL1 |
| Payload. For the same reason, the FDT needs to be compiled from the DT source |
| and loaded via the ``--data cluster0.cpu0="<path-to>/<fdt>"@0x82000000`` |
| parameter. |
| |
| - The ``-C cluster<X>.cpu<Y>.RVBAR=@<base-address-of-bl31>`` parameter, where |
| X and Y are the cluster and CPU numbers respectively, is used to set the |
| reset vector for each core. |
| |
| - Changing the default value of ``ARM_TSP_RAM_LOCATION`` will also require |
| changing the value of |
| ``--data="<path-to><bl32-binary>"@<base-address-of-bl32>`` to the new value of |
| ``BL32_BASE``. |
| |
| Running on the AEMv8 Base FVP (AArch32) with reset to SP\_MIN entrypoint |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| The following ``FVP_Base_AEMv8A-AEMv8A`` parameters should be used to boot Linux |
| with 8 CPUs using the AArch32 build of TF-A. |
| |
| :: |
| |
| <path-to>/FVP_Base_AEMv8A-AEMv8A \ |
| -C pctl.startup=0.0.0.0 \ |
| -C bp.secure_memory=1 \ |
| -C bp.tzc_400.diagnostics=1 \ |
| -C cluster0.NUM_CORES=4 \ |
| -C cluster1.NUM_CORES=4 \ |
| -C cache_state_modelled=1 \ |
| -C cluster0.cpu0.CONFIG64=0 \ |
| -C cluster0.cpu1.CONFIG64=0 \ |
| -C cluster0.cpu2.CONFIG64=0 \ |
| -C cluster0.cpu3.CONFIG64=0 \ |
| -C cluster1.cpu0.CONFIG64=0 \ |
| -C cluster1.cpu1.CONFIG64=0 \ |
| -C cluster1.cpu2.CONFIG64=0 \ |
| -C cluster1.cpu3.CONFIG64=0 \ |
| -C cluster0.cpu0.RVBAR=0x04001000 \ |
| -C cluster0.cpu1.RVBAR=0x04001000 \ |
| -C cluster0.cpu2.RVBAR=0x04001000 \ |
| -C cluster0.cpu3.RVBAR=0x04001000 \ |
| -C cluster1.cpu0.RVBAR=0x04001000 \ |
| -C cluster1.cpu1.RVBAR=0x04001000 \ |
| -C cluster1.cpu2.RVBAR=0x04001000 \ |
| -C cluster1.cpu3.RVBAR=0x04001000 \ |
| --data cluster0.cpu0="<path-to>/<bl32-binary>"@0x04001000 \ |
| --data cluster0.cpu0="<path-to>/<bl33-binary>"@0x88000000 \ |
| --data cluster0.cpu0="<path-to>/<fdt>"@0x82000000 \ |
| --data cluster0.cpu0="<path-to>/<kernel-binary>"@0x80080000 \ |
| --data cluster0.cpu0="<path-to>/<ramdisk>"@0x84000000 |
| |
| Note: The load address of ``<bl32-binary>`` depends on the value ``BL32_BASE``. |
| It should match the address programmed into the RVBAR register as well. |
| |
| Running on the Cortex-A57-A53 Base FVP with reset to BL31 entrypoint |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| The following ``FVP_Base_Cortex-A57x4-A53x4`` model parameters should be used to |
| boot Linux with 8 CPUs using the AArch64 build of TF-A. |
| |
| :: |
| |
| <path-to>/FVP_Base_Cortex-A57x4-A53x4 \ |
| -C pctl.startup=0.0.0.0 \ |
| -C bp.secure_memory=1 \ |
| -C bp.tzc_400.diagnostics=1 \ |
| -C cache_state_modelled=1 \ |
| -C cluster0.cpu0.RVBARADDR=0x04020000 \ |
| -C cluster0.cpu1.RVBARADDR=0x04020000 \ |
| -C cluster0.cpu2.RVBARADDR=0x04020000 \ |
| -C cluster0.cpu3.RVBARADDR=0x04020000 \ |
| -C cluster1.cpu0.RVBARADDR=0x04020000 \ |
| -C cluster1.cpu1.RVBARADDR=0x04020000 \ |
| -C cluster1.cpu2.RVBARADDR=0x04020000 \ |
| -C cluster1.cpu3.RVBARADDR=0x04020000 \ |
| --data cluster0.cpu0="<path-to>/<bl31-binary>"@0x04020000 \ |
| --data cluster0.cpu0="<path-to>/<bl32-binary>"@0x04001000 \ |
| --data cluster0.cpu0="<path-to>/<bl33-binary>"@0x88000000 \ |
| --data cluster0.cpu0="<path-to>/<fdt>"@0x82000000 \ |
| --data cluster0.cpu0="<path-to>/<kernel-binary>"@0x80080000 \ |
| --data cluster0.cpu0="<path-to>/<ramdisk>"@0x84000000 |
| |
| Running on the Cortex-A32 Base FVP (AArch32) with reset to SP\_MIN entrypoint |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| The following ``FVP_Base_Cortex-A32x4`` model parameters should be used to |
| boot Linux with 4 CPUs using the AArch32 build of TF-A. |
| |
| :: |
| |
| <path-to>/FVP_Base_Cortex-A32x4 \ |
| -C pctl.startup=0.0.0.0 \ |
| -C bp.secure_memory=1 \ |
| -C bp.tzc_400.diagnostics=1 \ |
| -C cache_state_modelled=1 \ |
| -C cluster0.cpu0.RVBARADDR=0x04001000 \ |
| -C cluster0.cpu1.RVBARADDR=0x04001000 \ |
| -C cluster0.cpu2.RVBARADDR=0x04001000 \ |
| -C cluster0.cpu3.RVBARADDR=0x04001000 \ |
| --data cluster0.cpu0="<path-to>/<bl32-binary>"@0x04001000 \ |
| --data cluster0.cpu0="<path-to>/<bl33-binary>"@0x88000000 \ |
| --data cluster0.cpu0="<path-to>/<fdt>"@0x82000000 \ |
| --data cluster0.cpu0="<path-to>/<kernel-binary>"@0x80080000 \ |
| --data cluster0.cpu0="<path-to>/<ramdisk>"@0x84000000 |
| |
| Running the software on Juno |
| ---------------------------- |
| |
| This version of TF-A has been tested on variants r0, r1 and r2 of Juno. |
| |
| To execute the software stack on Juno, the version of the Juno board recovery |
| image indicated in the `Linaro Release Notes`_ must be installed. If you have an |
| earlier version installed or are unsure which version is installed, please |
| re-install the recovery image by following the |
| `Instructions for using Linaro's deliverables on Juno`_. |
| |
| Preparing TF-A images |
| ~~~~~~~~~~~~~~~~~~~~~ |
| |
| After building TF-A, the files ``bl1.bin`` and ``fip.bin`` need copying to the |
| ``SOFTWARE/`` directory of the Juno SD card. |
| |
| Other Juno software information |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| Please visit the `Arm Platforms Portal`_ to get support and obtain any other Juno |
| software information. Please also refer to the `Juno Getting Started Guide`_ to |
| get more detailed information about the Juno Arm development platform and how to |
| configure it. |
| |
| Testing SYSTEM SUSPEND on Juno |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| The SYSTEM SUSPEND is a PSCI API which can be used to implement system suspend |
| to RAM. For more details refer to section 5.16 of `PSCI`_. To test system suspend |
| on Juno, at the linux shell prompt, issue the following command: |
| |
| :: |
| |
| echo +10 > /sys/class/rtc/rtc0/wakealarm |
| echo -n mem > /sys/power/state |
| |
| The Juno board should suspend to RAM and then wakeup after 10 seconds due to |
| wakeup interrupt from RTC. |
| |
| -------------- |
| |
| *Copyright (c) 2013-2018, Arm Limited and Contributors. All rights reserved.* |
| |
| .. _Linaro: `Linaro Release Notes`_ |
| .. _Linaro Release: `Linaro Release Notes`_ |
| .. _Linaro Release Notes: https://community.arm.com/dev-platforms/w/docs/226/old-linaro-release-notes |
| .. _Linaro Release 17.10: https://community.arm.com/dev-platforms/w/docs/226/old-linaro-release-notes#1710 |
| .. _Linaro instructions: https://community.arm.com/dev-platforms/w/docs/304/linaro-software-deliverables |
| .. _Instructions for using Linaro's deliverables on Juno: https://community.arm.com/dev-platforms/w/docs/303/juno |
| .. _Arm Platforms Portal: https://community.arm.com/dev-platforms/ |
| .. _Development Studio 5 (DS-5): http://www.arm.com/products/tools/software-tools/ds-5/index.php |
| .. _Linux master tree: <https://github.com/torvalds/linux/tree/master/> |
| .. _Dia: https://wiki.gnome.org/Apps/Dia/Download |
| .. _here: psci-lib-integration-guide.rst |
| .. _Trusted Board Boot: trusted-board-boot.rst |
| .. _TB_FW_CONFIG for FVP: ../plat/arm/board/fvp/fdts/fvp_tb_fw_config.dts |
| .. _Secure-EL1 Payloads and Dispatchers: firmware-design.rst#user-content-secure-el1-payloads-and-dispatchers |
| .. _Firmware Update: firmware-update.rst |
| .. _Firmware Design: firmware-design.rst |
| .. _mbed TLS Repository: https://github.com/ARMmbed/mbedtls.git |
| .. _mbed TLS Security Center: https://tls.mbed.org/security |
| .. _Arm's website: `FVP models`_ |
| .. _FVP models: https://developer.arm.com/products/system-design/fixed-virtual-platforms |
| .. _Juno Getting Started Guide: http://infocenter.arm.com/help/topic/com.arm.doc.dui0928e/DUI0928E_juno_arm_development_platform_gsg.pdf |
| .. _PSCI: http://infocenter.arm.com/help/topic/com.arm.doc.den0022d/Power_State_Coordination_Interface_PDD_v1_1_DEN0022D.pdf |