[PATCH RFC v3 4/4] MIPS: BMIPS: accept UHI interface for passing a dtb

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Detect and use passed dtb address using the UHI interface. This allows for
booting with a vmlinux.bin appended dtb instead of using a built-in one.

Signed-off-by: Jonas Gorski <jogo@xxxxxxxxxxx>
---
 arch/mips/bmips/setup.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/mips/bmips/setup.c b/arch/mips/bmips/setup.c
index fae800e..526ec27 100644
--- a/arch/mips/bmips/setup.c
+++ b/arch/mips/bmips/setup.c
@@ -149,6 +149,8 @@ void __init plat_mem_setup(void)
 	/* intended to somewhat resemble ARM; see Documentation/arm/Booting */
 	if (fw_arg0 == 0 && fw_arg1 == 0xffffffff)
 		dtb = phys_to_virt(fw_arg2);
+	else if (fw_arg0 == -2) /* UHI interface */
+		dtb = (void *)fw_arg1;
 	else if (__dtb_start != __dtb_end)
 		dtb = (void *)__dtb_start;
 	else
-- 
1.7.10.4
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