arm: return both physical and virtual addresses from addruart
Rather than checking the MMU status in every instance of addruart, do it
once in kernel/debug.S, and change the existing addruart macros to
return both physical and virtual addresses. The main debug code can then
select the appropriate address to use.
This will also allow us to retreive the address of a uart for the MMU
state that we're not current in.
Updated with fixes for OMAP from Jason Wang <jason77.wang@gmail.com>
and Tony Lindgren <tony@atomide.com>, and fix for versatile express from
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>.
Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Jason Wang <jason77.wang@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Tested-by: Kevin Hilman <khilman@deeprootsystems.com>
diff --git a/arch/arm/mach-ixp4xx/include/mach/debug-macro.S b/arch/arm/mach-ixp4xx/include/mach/debug-macro.S
index 3fc66d6..b974a49 100644
--- a/arch/arm/mach-ixp4xx/include/mach/debug-macro.S
+++ b/arch/arm/mach-ixp4xx/include/mach/debug-macro.S
@@ -10,16 +10,16 @@
* published by the Free Software Foundation.
*/
- .macro addruart, rx, tmp
- mrc p15, 0, \rx, c1, c0
- tst \rx, #1 @ MMU enabled?
- moveq \rx, #0xc8000000
- movne \rx, #0xff000000
- orrne \rx, \rx, #0x00b00000
+ .macro addruart, rp, rv
#ifdef __ARMEB__
- add \rx,\rx,#3 @ Uart regs are at off set of 3 if
- @ byte writes used - Big Endian.
+ mov \rp, #3 @ Uart regs are at off set of 3 if
+ @ byte writes used - Big Endian.
+#else
+ mov \rp, #0
#endif
+ orr \rv, \rp, #0xff000000 @ virtual
+ orr \rv, \rv, #0x00b00000
+ orr \rp, \rp, #0xc8000000 @ physical
.endm
#define UART_SHIFT 2