ARM: pxa: move debug uart code

Move debug uart code from mach-pxa/mach-mmp to debug directory.
Since they are similar, merge them together.

Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Acked-by: Eric Mico <eric.y.miao@gmail.com>

arch/arm/Kconfig.debug

@@ -312,6 +312,13 @@ choice
 		  Say Y here if you want kernel low-level debugging support
 		  on PicoXcell based platforms.
 
+	config DEBUG_PXA_UART1
+		depends on ARCH_PXA
+		bool "Use PXA UART1 for low-level debug"
+		help
+		  Say Y here if you want kernel low-level debugging support
+		  on PXA UART1.
+
 	config DEBUG_REALVIEW_STD_PORT
 		bool "RealView Default UART"
 		depends on ARCH_REALVIEW
@@ -593,6 +600,8 @@ config DEBUG_LL_INCLUDE
 	default "debug/mvebu.S" if DEBUG_MVEBU_UART
 	default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART
 	default "debug/picoxcell.S" if DEBUG_PICOXCELL_UART
+	default "debug/pxa.S" if DEBUG_PXA_UART1 || DEBUG_MMP_UART2 || \
+				 DEBUG_MMP_UART3
 	default "debug/socfpga.S" if DEBUG_SOCFPGA_UART
 	default "debug/sunxi.S" if DEBUG_SUNXI_UART0 || DEBUG_SUNXI_UART1
 	default "debug/vexpress.S" if DEBUG_VEXPRESS_UART0_DETECT || \

arch/arm/include/debug/pxa.S

@@ -0,0 +1,33 @@
+/*
+ * Early serial output macro for Marvell PXA/MMP SoC
+ *
+ * Copyright (C) 1994-1999 Russell King
+ * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
+ *
+ * Copyright (C) 2013 Haojian Zhuang
+ *
+ * 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.
+*/
+
+#if defined(CONFIG_DEBUG_PXA_UART1)
+#define PXA_UART_REG_PHYS_BASE	0x40100000
+#define PXA_UART_REG_VIRT_BASE	0xf2100000
+#elif defined(CONFIG_DEBUG_MMP_UART2)
+#define PXA_UART_REG_PHYS_BASE	0xd4017000
+#define PXA_UART_REG_VIRT_BASE	0xfe017000
+#elif defined(CONFIG_DEBUG_MMP_UART3)
+#define PXA_UART_REG_PHYS_BASE	0xd4018000
+#define PXA_UART_REG_VIRT_BASE	0xfe018000
+#else
+#error "Select uart for DEBUG_LL"
+#endif
+
+	.macro	addruart, rp, rv, tmp
+	ldr	\rp, =PXA_UART_REG_PHYS_BASE
+	ldr	\rv, =PXA_UART_REG_VIRT_BASE
+	.endm
+
+#define UART_SHIFT	2
+#include <asm/hardware/debug-8250.S>