[U-Boot] [PATCH v3 17/66] armv8: spl: Support separate stack for TPL

Philipp Tomsich
2017-07-28T19:21:49Z

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>
---

Changes in v3: None
Changes in v2: None

arch/arm/lib/crt0_64.S | 4 +++-
scripts/config_whitelist.txt | 1 +
2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/arm/lib/crt0_64.S b/arch/arm/lib/crt0_64.S
index 57e728f..177b5bf 100644
--- a/arch/arm/lib/crt0_64.S
+++ b/arch/arm/lib/crt0_64.S
@@ -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)
diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index 93f0bf4..0a06dff 100644
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -4983,6 +4983,7 @@ 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
--
2.1.4