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amlogic: axg: Add a build flag when using ATOS as BL32

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BL2 is unconditionally setting 0 (OPTEE_AARCH64) in arg0 even when the
BL32 image is 32bit (OPTEE_AARCH32). This is causing the boot to hang
when ATOS (32bit Amlogic BL32 binary-only TEE OS) is used.

Since we are not aware of any Amlogic platform shipping a 64bit version
of ATOS we can hardcode OPTEE_AARCH32 / MODE_RW_32 when using ATOS.

Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Change-Id: Iaea47cf6dc48bf8a646056761f02fb81b41c78a3
This commit is contained in:
Carlo Caione 2020-01-27 16:03:28 +01:00
parent afd241e71d
commit 72d2535afd
3 changed files with 16 additions and 0 deletions
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1
docs/plat/meson-axg.rst
View file

@ -18,6 +18,7 @@ In order to build it:
.. code:: shell
CROSS_COMPILE=aarch64-none-elf- make DEBUG=1 PLAT=axg [SPD=opteed]
[AML_USE_ATOS=1 when using ATOS as BL32]
This port has been tested on a A113D board. After building it, follow the
instructions in the `U-Boot repository`_, replacing the mentioned **bl31.img**

11
plat/amlogic/axg/axg_bl31_setup.c
View file

@ -84,6 +84,17 @@ void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
bl32_image_ep_info = *from_bl2->bl32_ep_info;
bl33_image_ep_info = *from_bl2->bl33_ep_info;
#if AML_USE_ATOS
/*
* BL2 is unconditionally setting 0 (OPTEE_AARCH64) in arg0 even when
* the BL32 image is 32bit (OPTEE_AARCH32). This is causing the boot to
* hang when ATOS (32bit Amlogic BL32 binary-only TEE OS) is used.
*
* Hardcode to OPTEE_AARCH32 / MODE_RW_32.
*/
bl32_image_ep_info.args.arg0 = MODE_RW_32;
#endif
if (bl33_image_ep_info.pc == 0U) {
ERROR("BL31: BL33 entrypoint not obtained from BL2\n");
panic();

4
plat/amlogic/axg/platform.mk
View file

@ -66,6 +66,10 @@ SEPARATE_CODE_AND_RODATA := 1
# Use Coherent memory
USE_COHERENT_MEM := 1
AML_USE_ATOS := 0
$(eval $(call assert_boolean,AML_USE_ATOS))
$(eval $(call add_define,AML_USE_ATOS))
# Verify build config
# -------------------