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: Florian Fainelli <f.fainelli@gmail.com>

diff --git a/arch/arm/include/debug/brcmstb.S b/arch/arm/include/debug/brcmstb.S
index 52aaed2..c826f15 100644 (file)
--- a/arch/arm/include/debug/brcmstb.S
+++ b/arch/arm/include/debug/brcmstb.S
@@ -58,6 +58,7 @@
                /* Check SUN_TOP_CTRL base */
                ldr     \rp, =SUN_TOP_CTRL_BASE @ load SUN_TOP_CTRL PA
                ldr     \rv, [\rp, #0]          @ get register contents
+ARM_BE8(       rev     \rv, \rv )
                and     \rv, \rv, #0xffffff00   @ strip revision bits [7:0]
 
                /* Chip specific detection starts here */
@@ -98,11 +99,13 @@
                .endm
 
                .macro  store, rd, rx:vararg
+ARM_BE8(       rev     \rd, \rd )
                str     \rd, \rx
                .endm
 
                .macro  load, rd, rx:vararg
                ldr     \rd, \rx
+ARM_BE8(       rev     \rd, \rd )
                .endm
 
                .macro  senduart,rd,rx