| config OPTEE_LIB |
| bool "Support OPTEE library" |
| default y if OPTEE || OPTEE_IMAGE |
| help |
| Selecting this option will enable the shared OPTEE library code. |
| |
| config HAS_TEE_IN_BUILD_ENV |
| def_bool $(success, test -n "$(TEE)") |
| select OPTEE_LIB if OF_CONTROL |
| select OF_LIBFDT if OF_CONTROL |
| help |
| It is typical whenever OP-TEE OS is loaded before U-Boot proper that |
| it modifies the FDT passed to U-Boot proper to add reserved-memory |
| nodes for the RAM it just reserved for itself. |
| |
| U-Boot must copy those reserved-nodes in the FDT for the next OS to |
| boot. |
| |
| Failing to do so will incur random crashes or device reboots once the |
| next OS is running. |
| |
| This makes sure that whenever TEE is present in the environment, |
| meaning a TEE OS will be part of the boot flow, the copy made by the |
| OP-TEE lib will happen. |
| |
| config OPTEE_IMAGE |
| bool "Support OPTEE images" |
| help |
| Selecting this option to boot OPTEE images. |
| This option enable the OPTEE specific checks done before booting |
| an OPTEE image created with mkimage |
| |
| config OPTEE_TZDRAM_SIZE |
| hex "Amount of Trust-Zone RAM for the OPTEE image" |
| default 0x0000000 |
| depends on OPTEE_LIB |
| help |
| The size of pre-allocated Trust Zone DRAM to allocate for the OPTEE |
| runtime. |
| |
| config BOOTM_OPTEE |
| bool "Support OPTEE bootm command" |
| select BOOTM_LINUX |
| select OPTEE_IMAGE |
| help |
| Select this command to enable chain-loading of a Linux kernel |
| via an OPTEE firmware. |
| The bootflow is BootROM -> u-boot -> OPTEE -> Linux in this case. |
