[ARM PATCH] 1986/1: bootpImage/ARM: add ability to run from non-zero address

Patch from Kevin Hilman

The following patch allows the bootpImage to be loaded and executed
from a non-zero address.  On OMAP platforms for example, the physical
address for SDRAM is 0x10000000 and not zero.

arch/arm/boot/bootp/init.S

@@ -20,8 +20,10 @@
 		.type	_start, #function
 		.globl	_start
 
-_start:		adr	r13, data
+_start:		add	lr, pc, #-0x8		@ lr = current load addr
+		adr	r13, data
 		ldmia	r13!, {r4-r6}		@ r5 = dest, r6 = length
+		add	r4, r4, lr		@ r4 = initrd_start + load addr
 		bl	move			@ move the initrd
 
 /*