ARM: pl01x debug code endian fix

The PL01X debug code needs to take into account which endian mode the
processor is running in. If it is big-endian, ensure the data is swapped
appropriately.

Note, we could do this slightly more efficiently if we have an macro to
do the necessary swap for the bits used by test.

Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>

diff --git a/arch/arm/include/debug/pl01x.S b/arch/arm/include/debug/pl01x.S
index 37c6895..92ef808 100644 (file)
--- a/arch/arm/include/debug/pl01x.S
+++ b/arch/arm/include/debug/pl01x.S
@@ -25,12 +25,14 @@
 
                .macro  waituart,rd,rx
 1001:          ldr     \rd, [\rx, #UART01x_FR]
+ ARM_BE8(      rev     \rd, \rd )
                tst     \rd, #UART01x_FR_TXFF
                bne     1001b
                .endm
 
                .macro  busyuart,rd,rx
 1001:          ldr     \rd, [\rx, #UART01x_FR]
+ ARM_BE8(      rev     \rd, \rd )
                tst     \rd, #UART01x_FR_BUSY
                bne     1001b
                .endm