diff options
| author | Varun Wadekar <vwadekar@nvidia.com> | 2015-07-31 10:03:01 +0530 |
|---|---|---|
| committer | Varun Wadekar <vwadekar@nvidia.com> | 2015-07-31 10:26:22 +0530 |
| commit | 0bf1b022f29147bdbab825947c07ed4509eac7fc (patch) | |
| tree | a323f5380140f1920cbaf873fa45414b2369538e /docs/spd | |
| parent | 42ca2d86c8ef3cc7b44db65343f2275177fe9ff3 (diff) | |
Tegra: retrieve BL32's bootargs from bl32_ep_info
This patch removes the bootargs pointer from the platform params
structure. Instead the bootargs are passed by the BL2 in the
bl32_ep_info struct which is a part of the EL3 params struct.
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Diffstat (limited to 'docs/spd')
| -rw-r--r-- | docs/spd/tlk-dispatcher.md | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/docs/spd/tlk-dispatcher.md b/docs/spd/tlk-dispatcher.md index 890b35e7..40c83444 100644 --- a/docs/spd/tlk-dispatcher.md +++ b/docs/spd/tlk-dispatcher.md @@ -10,12 +10,9 @@ In order to compile TLK-D, we need a BL32 image to be present. Since, TLKD 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=<path_to_linaro_chain>/bin/aarch64-none-elf- make NEED_BL1=0 -NEED_BL2=0 BL32=<path_to_BL32_image> PLAT=<platform> 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 @@ Build TLK ========= 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 + |