MIPS: implement device-tree handover to Linux kernel
Add device-tree handover to Linux kernel conforming with MIPS UHI [1].
Register $a0 will be set to the reserved value -2. The address of
the device-tree blob will be stored as KSEG0 address in $a1. $a2 and
$a3 are set to zero.
[1] http://prplfoundation.org/wiki/MIPS_documentation
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index bc4283d..b0a8a43 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -141,15 +141,12 @@
The address of the enviroment is stored in register $a2.
config MIPS_BOOT_FDT
- bool "Hand over a flattened device tree to Linux kernel (INCOMPLETE)"
+ bool "Hand over a flattened device tree to Linux kernel"
default n
help
Enable this option if you want U-Boot to hand over a flattened
- device tree to the kernel.
-
- Note: the final hand over to the kernel is not yet implemented. After
- the community agreed on the MIPS boot interface for device trees,
- the corresponding code will be added.
+ device tree to the kernel. According to UHI register $a0 will be set
+ to -2 and the FDT address is stored in $a1.
endmenu