[ARM] Collect Primecell PL01x-based debug implementations together

Several ARM machine implementations used a PL01x primecell compatible
serial port for debugging purposes, and indepdently implemented the low
level debug macros every time.  Provide a common implementation and
convert these implementations to use this version.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 29 insertions, 0 deletions

diff --git a/include/asm-arm/hardware/debug-pl01x.S b/include/asm-arm/hardware/debug-pl01x.S
new file mode 100644
index 00000000000..db0d0f7de5e
--- /dev/null
+++ b/include/asm-arm/hardware/debug-pl01x.S
@@ -0,0 +1,29 @@
+/* linux/include/asm-arm/arch-integrator/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 <linux/amba/serial.h>
+
+                .macro  senduart,rd,rx
+                strb    \rd, [\rx, #UART01x_DR]
+                .endm
+
+                .macro  waituart,rd,rx
+1001:           ldr     \rd, [\rx, #UART01x_FR]
+                tst     \rd, #UART01x_FR_TXFF
+                bne     1001b
+                .endm
+
+                .macro  busyuart,rd,rx
+1001:           ldr     \rd, [\rx, #UART01x_FR]
+                tst     \rd, #UART01x_FR_BUSY
+                bne     1001b
+                .endm