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Commit c1496352 authored by Florian Fainelli's avatar Florian Fainelli
Browse files

ARM: brcmstb: Add appropriate ARM_BE8() macros for swapping 



Building a big-endian kernel for ARCH_BRCMSTB revealed that we would not
be correctly polling for the right bit in the busyuart macro, turns out
there are a few transformations needed to work with big-endian kernels.
First we need to swap the value we read from SUN_TOP_CTRL to properly
compare it against our local tables. Then, just like 8250.S we need to
swap the value before storing it, and conversely swap it after a load.

Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
parent ea023be7

arch/arm/include/debug/brcmstb.S

+3 −0
Original line number Original line Diff line number Diff line
@@ -58,6 +58,7 @@ 
		/* Check SUN_TOP_CTRL base */

		/* Check SUN_TOP_CTRL base */

		ldr	\rp, =SUN_TOP_CTRL_BASE	@ load SUN_TOP_CTRL PA

		ldr	\rp, =SUN_TOP_CTRL_BASE	@ load SUN_TOP_CTRL PA

		ldr	\rv, [\rp, #0]		@ get register contents

		ldr	\rv, [\rp, #0]		@ get register contents

ARM_BE8(	rev	\rv, \rv )

		and	\rv, \rv, #0xffffff00	@ strip revision bits [7:0]

		and	\rv, \rv, #0xffffff00	@ strip revision bits [7:0]





		/* Chip specific detection starts here */

		/* Chip specific detection starts here */
@@ -98,11 +99,13 @@ 
		.endm

		.endm





		.macro	store, rd, rx:vararg

		.macro	store, rd, rx:vararg

ARM_BE8(	rev	\rd, \rd )

		str	\rd, \rx

		str	\rd, \rx

		.endm

		.endm





		.macro	load, rd, rx:vararg

		.macro	load, rd, rx:vararg

		ldr	\rd, \rx

		ldr	\rd, \rx

ARM_BE8(	rev	\rd, \rd )

		.endm

		.endm





		.macro	senduart,rd,rx

		.macro	senduart,rd,rx