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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>
This commit is contained in:
Varun Wadekar 2015-07-31 10:03:01 +05:30
parent 42ca2d86c8
commit 0bf1b022f2
3 changed files with 18 additions and 12 deletions
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20
docs/spd/tlk-dispatcher.md
View File

@ -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

9
plat/nvidia/tegra/common/tegra_bl31_setup.c
View File

@ -85,7 +85,7 @@ extern uint64_t tegra_bl31_phys_base;
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 @@ void bl31_early_platform_setup(bl31_params_t *from_bl2,
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;
}
}
/*******************************************************************************

1
plat/nvidia/tegra/include/tegra_private.h
View File

@ -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 */