luck/tmp_suning_uos_patched
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[ARM] 3459/1: ixp23xx: fix debug serial macros for big-endian operation

Browse Source 
Patch from Lennert Buytenhek

The debug-8250 macros do byte accesses, which means that if we're in
big-endian mode, we need to logically OR the UART address with 3, as
the LSB byte lane (where UART data and status is transferred) has the
highest byte address in the word when we are in big-endian mode.

It's unclear why this problem didn't surface earlier.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Lennert Buytenhek 2006-04-09 22:20:57 +01:00 committed by Russell King
parent c5b8ef62b5
commit 9323557975
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/asm-arm/arch-ixp23xx/debug-macro.S
View File

@ -17,6 +17,9 @@
tst \rx, #1 @ mmu enabled?
ldreq \rx, =IXP23XX_PERIPHERAL_PHYS @ physical
ldrne \rx, =IXP23XX_PERIPHERAL_VIRT @ virtual
#ifdef __ARMEB__
orr \rx, \rx, #0x00000003
#endif
.endm
#define UART_SHIFT 2