[PATCH v7 5/8] arm: armv8: save boot arguments

[Raymond Mao]

Save boot arguments x[0-3] into an array for handover of bloblist from
previous boot stage.

Signed-off-by: Raymond Mao <raymond.mao at linaro.org>
---
Changes in v2
- New patch file created for v2.
Changes in V5
- Drop the dependence on OF_BOARD.
Changes in V7
- Exclude the saved_args when BLOBLIST is disabled.

 arch/arm/cpu/armv8/start.S | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm/cpu/armv8/start.S b/arch/arm/cpu/armv8/start.S
index 6cc1d26e5e..2a26b1c276 100644
--- a/arch/arm/cpu/armv8/start.S
+++ b/arch/arm/cpu/armv8/start.S
@@ -370,5 +370,21 @@ ENTRY(c_runtime_cpu_setup)
 ENDPROC(c_runtime_cpu_setup)
 
 WEAK(save_boot_params)
+#if (IS_ENABLED(CONFIG_BLOBLIST))
+	adr x9, saved_args
+	stp x0, x1, [x9]
+	/* Increment the address by 16 bytes for the next pair of values */
+	stp x2, x3, [x9, #16]
+#endif
 	b	save_boot_params_ret	/* back to my caller */
 ENDPROC(save_boot_params)
+
+#if (IS_ENABLED(CONFIG_BLOBLIST))
+.section .data
+.global saved_args
+saved_args:
+	.rept 4
+	.xword 0
+	.endr
+END(saved_args)
+#endif
-- 
2.25.1