ARM: CSR: mapping early DEBUG_LL uart

Signed-off-by: Barry Song <baohua.song@csr.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/mach-prima2/Makefile

@@ -3,3 +3,4 @@ obj-y += irq.o
 obj-y += clock.o
 obj-y += rstc.o
 obj-y += prima2.o
+obj-$(CONFIG_DEBUG_LL) += lluart.o

arch/arm/mach-prima2/common.h

@@ -17,4 +17,10 @@ extern struct sys_timer sirfsoc_timer;
 extern void __init sirfsoc_of_irq_init(void);
 extern void __init sirfsoc_of_clk_init(void);
 
+#ifndef CONFIG_DEBUG_LL
+static inline void sirfsoc_map_lluart(void)  {}
+#else
+extern void __init sirfsoc_map_lluart(void);
+#endif
+
 #endif

arch/arm/mach-prima2/lluart.c

@@ -0,0 +1,25 @@
+/*
+ * Static memory mapping for DEBUG_LL
+ *
+ * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
+ *
+ * Licensed under GPLv2 or later.
+ */
+
+#include <linux/kernel.h>
+#include <asm/page.h>
+#include <asm/mach/map.h>
+#include <mach/map.h>
+#include <mach/uart.h>
+
+void __init sirfsoc_map_lluart(void)
+{
+	struct map_desc sirfsoc_lluart_map = {
+		.virtual        = SIRFSOC_UART1_VA_BASE,
+		.pfn            = __phys_to_pfn(SIRFSOC_UART1_PA_BASE),
+		.length         = SIRFSOC_UART1_SIZE,
+		.type           = MT_DEVICE,
+	};
+
+	iotable_init(&sirfsoc_lluart_map, 1);
+}

arch/arm/mach-prima2/prima2.c

@@ -33,6 +33,7 @@ MACHINE_START(PRIMA2_EVB, "prima2cb")
 	/* Maintainer: Barry Song <baohua.song@csr.com> */
 	.boot_params	= 0x00000100,
 	.init_early     = sirfsoc_of_clk_init,
+	.map_io         = sirfsoc_map_lluart,
 	.init_irq	= sirfsoc_of_irq_init,
 	.timer		= &sirfsoc_timer,
 	.init_machine	= sirfsoc_mach_init,