summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-sa1100/include/mach/debug-macro.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-sa1100/include/mach/debug-macro.S')
-rw-r--r--arch/arm/mach-sa1100/include/mach/debug-macro.S58
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/arm/mach-sa1100/include/mach/debug-macro.S b/arch/arm/mach-sa1100/include/mach/debug-macro.S
new file mode 100644
index 0000000..1f0634d
--- /dev/null
+++ b/arch/arm/mach-sa1100/include/mach/debug-macro.S
@@ -0,0 +1,58 @@
+/* arch/arm/mach-sa1100/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.
+ *
+*/
+#include <mach/hardware.h>
+
+ .macro addruart,rx
+ mrc p15, 0, \rx, c1, c0
+ tst \rx, #1 @ MMU enabled?
+ moveq \rx, #0x80000000 @ physical base address
+ movne \rx, #0xf8000000 @ virtual address
+
+ @ We probe for the active serial port here, coherently with
+ @ the comment in arch/arm/mach-sa1100/include/mach/uncompress.h.
+ @ We assume r1 can be clobbered.
+
+ @ see if Ser3 is active
+ add \rx, \rx, #0x00050000
+ ldr r1, [\rx, #UTCR3]
+ tst r1, #UTCR3_TXE
+
+ @ if Ser3 is inactive, then try Ser1
+ addeq \rx, \rx, #(0x00010000 - 0x00050000)
+ ldreq r1, [\rx, #UTCR3]
+ tsteq r1, #UTCR3_TXE
+
+ @ if Ser1 is inactive, then try Ser2
+ addeq \rx, \rx, #(0x00030000 - 0x00010000)
+ ldreq r1, [\rx, #UTCR3]
+ tsteq r1, #UTCR3_TXE
+
+ @ if all ports are inactive, then there is nothing we can do
+ moveq pc, lr
+ .endm
+
+ .macro senduart,rd,rx
+ str \rd, [\rx, #UTDR]
+ .endm
+
+ .macro waituart,rd,rx
+1001: ldr \rd, [\rx, #UTSR1]
+ tst \rd, #UTSR1_TNF
+ beq 1001b
+ .endm
+
+ .macro busyuart,rd,rx
+1001: ldr \rd, [\rx, #UTSR1]
+ tst \rd, #UTSR1_TBY
+ bne 1001b
+ .endm
OpenPOWER on IntegriCloud