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+renesas@gmail.com Cc: Nobuhiro Iwamatsu iwamatsu@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 */