The ATF can pass additional information via the first four registers,
x0...x3. The R-Car Gen3 with mainline ATF, register x1 contains pointer
to a device tree with platform information. Save these registers for
future use.
Signed-off-by: Marek Vasut <marek.vasut+rene...@gmail.com>
Cc: Nobuhiro Iwamatsu <iwama...@nigauri.org>
---
arch/arm/mach-rmobile/lowlevel_init_gen3.S | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/arch/arm/mach-rmobile/lowlevel_init_gen3.S
b/arch/arm/mach-rmobile/lowlevel_init_gen3.S
index f42b53fd88..213ec143e2 100644
--- a/arch/arm/mach-rmobile/lowlevel_init_gen3.S
+++ b/arch/arm/mach-rmobile/lowlevel_init_gen3.S
@@ -16,6 +16,21 @@
#include <linux/linkage.h>
#include <asm/macro.h>
+.align 8
+.globl rcar_atf_boot_args
+rcar_atf_boot_args:
+ .dword 0
+ .dword 0
+ .dword 0
+ .dword 0
+
+ENTRY(save_boot_params)
+ adr x8, rcar_atf_boot_args
+ stp x0, x1, [x8], #16
+ stp x2, x3, [x8], #16
+ b save_boot_params_ret
+ENDPROC(save_boot_params)
+
ENTRY(lowlevel_init)
mov x29, lr /* Save LR */
--
2.19.2
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