[PATCH v2 06/16] passage: arm: Accept a passage from the previous phase

[Simon Glass]

Accept a bloblist and control devicetree from a previous phase in
registers r0 and r1

Signed-off-by: Simon Glass <sjg at chromium.org>
---

Changes in v2:
- Use three registers instead of two for the entry

 arch/arm/cpu/armv7/start.S | 7 ++++++-
 arch/arm/lib/crt0.S        | 5 +++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S
index 698e15b8e18..494f4abdb1f 100644
--- a/arch/arm/cpu/armv7/start.S
+++ b/arch/arm/cpu/armv7/start.S
@@ -36,6 +36,11 @@
 #endif
 
 reset:
+	# Keep passage information in case it is provided
+	mov	r6, r1
+	mov	r7, r2
+	mov	r8, r3
+
 	/* Allow the board to save important registers */
 	b	save_boot_params
 save_boot_params_ret:
@@ -124,7 +129,7 @@ switch_to_hypervisor_ret:
 	bl	cpu_init_crit
 #endif
 #endif
-
+	# Note: r6-r8 are available to _main in case standard passage is used
 	bl	_main
 
 /*------------------------------------------------------------------------------*/
diff --git a/arch/arm/lib/crt0.S b/arch/arm/lib/crt0.S
index ba312901f33..68282ebfd02 100644
--- a/arch/arm/lib/crt0.S
+++ b/arch/arm/lib/crt0.S
@@ -117,6 +117,11 @@ ENTRY(_main)
 	CLEAR_BSS
 #endif
 
+#if CONFIG_IS_ENABLED(PASSAGE_IN)
+	str	r6, [r9, #GD_PASSAGE_MACH]
+	str	r7, [r9, #GD_PASSAGE_DTB]
+	str	r8, [r9, #GD_PASSAGE_BLOBLIST]
+#endif
 	mov	r0, #0
 	bl	board_init_f
 
-- 
2.34.1.703.g22d0c6ccf7-goog