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armv8: spl: Support separate stack for TPL

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To allow a TPL and SPL to run from different addresses/memories, we
need to split setup of the TPL and SPL stacks.  To do so, we introduce
CONFIG_TPL_STACK (not listed in Kconfig) which can be used to override
the initial stack pointer for TPL.

To provide backward compatibility for existing boards, this is added
as an optional configuration item and the normal search order (i.e.
SPL_STACK, then SYS_STACK) apply if not defined.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Philipp Tomsich 2017-07-04 11:02:14 +02:00
parent e6a0586277
commit c3be6190f9
2 changed files with 4 additions and 1 deletions
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4
arch/arm/lib/crt0_64.S
View File

@ -69,7 +69,9 @@ ENTRY(_main)
/*
* Set up initial C runtime environment and call board_init_f(0).
*/
#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_STACK)
#if defined(CONFIG_TPL_BUILD) && defined(CONFIG_TPL_STACK)
ldr x0, =(CONFIG_TPL_STACK)
#elif defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_STACK)
ldr x0, =(CONFIG_SPL_STACK)
#else
ldr x0, =(CONFIG_SYS_INIT_SP_ADDR)

1
scripts/config_whitelist.txt
View File

@ -4911,6 +4911,7 @@ CONFIG_TI_SPI_MMAP
CONFIG_TMU_TIMER
CONFIG_TPL_DRIVERS_MISC_SUPPORT
CONFIG_TPL_PAD_TO
CONFIG_TPL_STACK
CONFIG_TPM_TIS_BASE_ADDRESS
CONFIG_TPS6586X_POWER
CONFIG_TQM834X