diff --git a/docs/spd/tlk-dispatcher.md b/docs/spd/tlk-dispatcher.md index 890b35e..40c8344 100644 --- a/docs/spd/tlk-dispatcher.md +++ b/docs/spd/tlk-dispatcher.md @@ -10,12 +10,9 @@ just needs to compile, any BL32 image would do. To use TLK as the BL32, please refer to the "Build TLK" section. -Once a BL32 is ready, TLKD can be included in the image using the following -command: +Once a BL32 is ready, TLKD can be included in the image by adding "SPD=tlkd" +to the build command. -CROSS_COMPILE=/bin/aarch64-none-elf- make NEED_BL1=0 -NEED_BL2=0 BL32= PLAT= SPD=tlkd all -_ Trusted Little Kernel (TLK) =========================== TLK is a Trusted OS running as Secure EL1. It is a Free Open Source Software @@ -58,3 +55,16 @@ ========= To build and execute TLK, follow the instructions from "Building a TLK Device" section from Tegra_BSP_for_Android_TLK_FOSS_Reference.pdf manual. + +Input parameters to TLK +======================= +TLK expects the TZDRAM size and a structure containing the boot arguments. BL2 +passes this information to the EL3 software as members of the bl32_ep_info +struct, where bl32_ep_info is part of bl31_params_t (passed by BL2 in X0) + +Example: +-------- + bl32_ep_info->args.arg0 = TZDRAM size available for BL32 + bl32_ep_info->args.arg1 = unused (used only on ARMv7) + bl32_ep_info->args.arg2 = pointer to boot args + diff --git a/plat/nvidia/tegra/common/tegra_bl31_setup.c b/plat/nvidia/tegra/common/tegra_bl31_setup.c index ce7f317..d6ea664 100644 --- a/plat/nvidia/tegra/common/tegra_bl31_setup.c +++ b/plat/nvidia/tegra/common/tegra_bl31_setup.c @@ -85,7 +85,7 @@ static entry_point_info_t bl33_image_ep_info, bl32_image_ep_info; static plat_params_from_bl2_t plat_bl31_params_from_bl2 = { - (uint64_t)TZDRAM_SIZE, (uintptr_t)NULL + .tzdram_size = (uint64_t)TZDRAM_SIZE }; /******************************************************************************* @@ -145,13 +145,10 @@ bl32_image_ep_info = *from_bl2->bl32_ep_info; /* - * Parse platform specific parameters - TZDRAM aperture size and - * pointer to BL32 params. + * Parse platform specific parameters - TZDRAM aperture size */ - if (plat_params) { + if (plat_params) plat_bl31_params_from_bl2.tzdram_size = plat_params->tzdram_size; - plat_bl31_params_from_bl2.bl32_params = plat_params->bl32_params; - } } /******************************************************************************* diff --git a/plat/nvidia/tegra/include/tegra_private.h b/plat/nvidia/tegra/include/tegra_private.h index dbd6689..952e2d8 100644 --- a/plat/nvidia/tegra/include/tegra_private.h +++ b/plat/nvidia/tegra/include/tegra_private.h @@ -42,7 +42,6 @@ typedef struct plat_params_from_bl2 { uint64_t tzdram_size; - uintptr_t bl32_params; } plat_params_from_bl2_t; /* Declarations for plat_psci_handlers.c */