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>

1 files changed, 38 insertions, 0 deletions

diff --git a/arch/arm/mach-l7200/include/mach/debug-macro.S b/arch/arm/mach-l7200/include/mach/debug-macro.S
new file mode 100644
index 000000000000..b0a2db77d392
--- /dev/null
+++ b/arch/arm/mach-l7200/include/mach/debug-macro.S
@@ -0,0 +1,38 @@
+/* arch/arm/mach-l7200/include/mach/debug-macro.S
+ *
+ * Debugging macro include header
+ *
+ *  Copyright (C) 1994-1999 Russell King
+ *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+*/
+
+                .equ    io_virt, IO_BASE
+                .equ    io_phys, IO_START
+
+                .macro  addruart, rp, rv
+                mov     \rp, #0x00044000        @ UART1
+@               mov     \rp, #0x00045000        @ UART2
+                add     \rv, \rp, #io_virt      @ virtual address
+                add     \rp, \rp, #io_phys      @ physical base address
+                .endm
+
+                .macro  senduart,rd,rx
+                str     \rd, [\rx, #0x0]        @ UARTDR
+                .endm
+
+                .macro  waituart,rd,rx
+1001:           ldr     \rd, [\rx, #0x18]       @ UARTFLG
+                tst     \rd, #1 << 5            @ UARTFLGUTXFF - 1 when full
+                bne     1001b
+                .endm
+
+                .macro  busyuart,rd,rx
+1001:           ldr     \rd, [\rx, #0x18]       @ UARTFLG
+                tst     \rd, #1 << 3            @ UARTFLGUBUSY - 1 when busy
+                bne     1001b
+                .endm