From: Philipp Tomsich <philipp.toms...@theobroma-systems.com>
As part of the startup process for boards using the SPL, we need to
call spl_relocate_stack_gd. This is needed to set up malloc with its
DRAM buffer.
[Andre: fix comment]
Signed-off-by: Philipp Tomsich <philipp.toms...@theobroma-systems.com>
Reviewed-by: Andre Przywara <andre.przyw...@arm.com>
Reviewed-by: Simon Glass <s...@chromium.org>
Signed-off-by: Andre Przywara <andre.przyw...@arm.com>
---
arch/arm/lib/crt0_64.S | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/arch/arm/lib/crt0_64.S b/arch/arm/lib/crt0_64.S
index 19c6a98..e59fd3e 100644
--- a/arch/arm/lib/crt0_64.S
+++ b/arch/arm/lib/crt0_64.S
@@ -109,8 +109,18 @@ relocation_return:
*/
bl c_runtime_cpu_setup /* still call old routine */
#endif /* !CONFIG_SPL_BUILD */
-
-/* TODO: For SPL, call spl_relocate_stack_gd() to alloc stack relocation */
+#if defined(CONFIG_SPL_BUILD)
+ bl spl_relocate_stack_gd /* may return NULL */
+ /*
+ * Perform 'sp = (x0 != NULL) ? x0 : sp' while working
+ * around the constraint that most arm64 instructions cannot
+ * have 'sp' as an operand.
+ */
+ mov x1, sp
+ cmp x0, #0
+ csel x0, x0, x1, ne
+ mov sp, x0
+#endif
/*
* Clear BSS section
--
2.8.2
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