When this option is set then ARM _main() function would call
arch_very_early_init() function at the beginning. It would be before
calling any other functions like debug_uart_init() and also before
initializing C runtime environment.
Signed-off-by: Pali Rohár <p...@kernel.org>
---
arch/arm/Kconfig | 6 ++++++
arch/arm/lib/crt0.S | 5 +++++
2 files changed, 11 insertions(+)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 0afec5155b1b..9898c7d68e1b 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -401,6 +401,12 @@ config SYS_ARM_CACHE_WRITEALLOC
write is performed.
endchoice
+config ARCH_VERY_EARLY_INIT
+ bool
+
+config SPL_ARCH_VERY_EARLY_INIT
+ bool
+
config ARCH_CPU_INIT
bool "Enable ARCH_CPU_INIT"
help
diff --git a/arch/arm/lib/crt0.S b/arch/arm/lib/crt0.S
index ba312901f331..612a2d5b698e 100644
--- a/arch/arm/lib/crt0.S
+++ b/arch/arm/lib/crt0.S
@@ -90,6 +90,11 @@ clbss_l:cmp r0, r1 /* while not at end of
BSS */
ENTRY(_main)
+/* Call arch_very_early_init before initializing C runtime environment. */
+#if CONFIG_IS_ENABLED(ARCH_VERY_EARLY_INIT)
+ bl arch_very_early_init
+#endif
+
/*
* Set up initial C runtime environment and call board_init_f(0).
*/
--
2.20.1
