ARM: S5P6442: Add Samsung S5P6442 CPU support

This patch adds support for Samsung S5P6442 CPU. This patch also adds
an entry for S5P6442 cpu in plat-s5p cpu table.

Signed-off-by: Adityapratap Sharma <aditya.ps@samsung.com>
Signed-off-by: Atul Dahiya <atul.dahiya@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

17 files changed, 617 insertions, 0 deletions

diff --git a/arch/arm/mach-s5p6442/Kconfig b/arch/arm/mach-s5p6442/Kconfig
new file mode 100644
index 000000000000..4f3f6de6a013
--- /dev/null
+++ b/arch/arm/mach-s5p6442/Kconfig
@@ -0,0 +1,24 @@
+# arch/arm/mach-s5p6442/Kconfig
+#
+# Copyright (c) 2010 Samsung Electronics Co., Ltd.
+#               http://www.samsung.com/
+#
+# Licensed under GPLv2
+
+# Configuration options for the S5P6442
+
+if ARCH_S5P6442
+
+config CPU_S5P6442
+        bool
+        select PLAT_S5P
+        help
+          Enable S5P6442 CPU support
+
+config MACH_SMDK6442
+        bool "SMDK6442"
+        select CPU_S5P6442
+        help
+          Machine support for Samsung SMDK6442
+
+endif
diff --git a/arch/arm/mach-s5p6442/Makefile b/arch/arm/mach-s5p6442/Makefile
new file mode 100644
index 000000000000..8a0f8ac65602
--- /dev/null
+++ b/arch/arm/mach-s5p6442/Makefile
@@ -0,0 +1,18 @@
+# arch/arm/mach-s5p6442/Makefile
+#
+# Copyright (c) 2010 Samsung Electronics Co., Ltd.
+#               http://www.samsung.com/
+#
+# Licensed under GPLv2
+
+obj-y                           :=
+obj-m                           :=
+obj-n                           :=
+obj-                            :=
+
+# Core support for S5P6442 system
+
+obj-$(CONFIG_CPU_S5P6442)       += cpu.o init.o
+
+# machine support
+
diff --git a/arch/arm/mach-s5p6442/Makefile.boot b/arch/arm/mach-s5p6442/Makefile.boot
new file mode 100644
index 000000000000..ff90aa13bd67
--- /dev/null
+++ b/arch/arm/mach-s5p6442/Makefile.boot
@@ -0,0 +1,2 @@
+   zreladdr-y   := 0x20008000
+params_phys-y   := 0x20000100
diff --git a/arch/arm/mach-s5p6442/cpu.c b/arch/arm/mach-s5p6442/cpu.c
new file mode 100644
index 000000000000..bc2524df89b3
--- /dev/null
+++ b/arch/arm/mach-s5p6442/cpu.c
@@ -0,0 +1,121 @@
+/* linux/arch/arm/mach-s5p6442/cpu.c
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com/
+ *
+ * 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/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/timer.h>
+#include <linux/init.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/sysdev.h>
+#include <linux/serial_core.h>
+#include <linux/platform_device.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/irq.h>
+
+#include <asm/proc-fns.h>
+
+#include <mach/hardware.h>
+#include <mach/map.h>
+#include <asm/irq.h>
+
+#include <plat/regs-serial.h>
+#include <mach/regs-clock.h>
+
+#include <plat/cpu.h>
+#include <plat/devs.h>
+#include <plat/clock.h>
+#include <plat/s5p6442.h>
+
+/* Initial IO mappings */
+
+static struct map_desc s5p6442_iodesc[] __initdata = {
+        {
+                .virtual        = (unsigned long)S5P_VA_SYSTIMER,
+                .pfn            = __phys_to_pfn(S5P6442_PA_SYSTIMER),
+                .length         = SZ_16K,
+                .type           = MT_DEVICE,
+        }, {
+                .virtual        = (unsigned long)VA_VIC2,
+                .pfn            = __phys_to_pfn(S5P6442_PA_VIC2),
+                .length         = SZ_16K,
+                .type           = MT_DEVICE,
+        }
+};
+
+static void s5p6442_idle(void)
+{
+        if (!need_resched())
+                cpu_do_idle();
+
+        local_irq_enable();
+}
+
+/* s5p6442_map_io
+ *
+ * register the standard cpu IO areas
+*/
+
+void __init s5p6442_map_io(void)
+{
+        iotable_init(s5p6442_iodesc, ARRAY_SIZE(s5p6442_iodesc));
+}
+
+void __init s5p6442_init_clocks(int xtal)
+{
+        printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
+
+        s3c24xx_register_baseclocks(xtal);
+        s5p_register_clocks(xtal);
+        s5p6442_register_clocks();
+        s5p6442_setup_clocks();
+}
+
+void __init s5p6442_init_irq(void)
+{
+        /* S5P6442 supports 3 VIC */
+        u32 vic[3];
+
+        /* VIC0, VIC1, and VIC2: some interrupt reserved */
+        vic[0] = 0x7fefffff;
+        vic[1] = 0X7f389c81;
+        vic[2] = 0X1bbbcfff;
+
+        s5p_init_irq(vic, ARRAY_SIZE(vic));
+}
+
+static struct sysdev_class s5p6442_sysclass = {
+        .name   = "s5p6442-core",
+};
+
+static struct sys_device s5p6442_sysdev = {
+        .cls    = &s5p6442_sysclass,
+};
+
+static int __init s5p6442_core_init(void)
+{
+        return sysdev_class_register(&s5p6442_sysclass);
+}
+
+core_initcall(s5p6442_core_init);
+
+int __init s5p6442_init(void)
+{
+        printk(KERN_INFO "S5P6442: Initializing architecture\n");
+
+        /* set idle function */
+        pm_idle = s5p6442_idle;
+
+        return sysdev_register(&s5p6442_sysdev);
+}
diff --git a/arch/arm/mach-s5p6442/include/mach/debug-macro.S b/arch/arm/mach-s5p6442/include/mach/debug-macro.S
new file mode 100644
index 000000000000..1aae691e58ef
--- /dev/null
+++ b/arch/arm/mach-s5p6442/include/mach/debug-macro.S
@@ -0,0 +1,36 @@
+/* linux/arch/arm/mach-s5p6442/include/mach/debug-macro.S
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com/
+ *
+ * Based on arch/arm/mach-s3c6400/include/mach/debug-macro.S
+ *
+ * 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.
+*/
+
+/* pull in the relevant register and map files. */
+
+#include <mach/map.h>
+#include <plat/regs-serial.h>
+
+        .macro addruart, rx
+                mrc     p15, 0, \rx, c1, c0
+                tst     \rx, #1
+                ldreq   \rx, = S3C_PA_UART
+                ldrne   \rx, = S3C_VA_UART
+#if CONFIG_DEBUG_S3C_UART != 0
+                add     \rx, \rx, #(0x400 * CONFIG_DEBUG_S3C_UART)
+#endif
+        .endm
+
+#define fifo_full fifo_full_s5pv210
+#define fifo_level fifo_level_s5pv210
+
+/* include the reset of the code which will do the work, we're only
+ * compiling for a single cpu processor type so the default of s3c2440
+ * will be fine with us.
+ */
+
+#include <plat/debug-macro.S>
diff --git a/arch/arm/mach-s5p6442/include/mach/entry-macro.S b/arch/arm/mach-s5p6442/include/mach/entry-macro.S
new file mode 100644
index 000000000000..6d574edbf1ae
--- /dev/null
+++ b/arch/arm/mach-s5p6442/include/mach/entry-macro.S
@@ -0,0 +1,48 @@
+/* linux/arch/arm/mach-s5p6442/include/mach/entry-macro.S
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com/
+ *
+ * Low-level IRQ helper macros for the Samsung S5P6442
+ *
+ * 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 <asm/hardware/vic.h>
+#include <mach/map.h>
+#include <plat/irqs.h>
+
+        .macro  disable_fiq
+        .endm
+
+        .macro  get_irqnr_preamble, base, tmp
+        ldr     \base, =VA_VIC0
+        .endm
+
+        .macro  arch_ret_to_user, tmp1, tmp2
+        .endm
+
+        .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
+
+        @ check the vic0
+        mov     \irqnr, # S5P_IRQ_OFFSET + 31
+        ldr     \irqstat, [ \base, # VIC_IRQ_STATUS ]
+        teq     \irqstat, #0
+
+        @ otherwise try vic1
+        addeq   \tmp, \base, #(VA_VIC1 - VA_VIC0)
+        addeq   \irqnr, \irqnr, #32
+        ldreq   \irqstat, [ \tmp, # VIC_IRQ_STATUS ]
+        teqeq   \irqstat, #0
+
+        @ otherwise try vic2
+        addeq   \tmp, \base, #(VA_VIC2 - VA_VIC0)
+        addeq   \irqnr, \irqnr, #32
+        ldreq   \irqstat, [ \tmp, # VIC_IRQ_STATUS ]
+        teqeq   \irqstat, #0
+
+        clzne   \irqstat, \irqstat
+        subne   \irqnr, \irqnr, \irqstat
+        .endm
diff --git a/arch/arm/mach-s5p6442/include/mach/gpio.h b/arch/arm/mach-s5p6442/include/mach/gpio.h
new file mode 100644
index 000000000000..b8715df2fdab
--- /dev/null
+++ b/arch/arm/mach-s5p6442/include/mach/gpio.h
@@ -0,0 +1,123 @@
+/* linux/arch/arm/mach-s5p6442/include/mach/gpio.h
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com/
+ *
+ * S5P6442 - GPIO lib support
+ *
+ * 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.
+*/
+
+#ifndef __ASM_ARCH_GPIO_H
+#define __ASM_ARCH_GPIO_H __FILE__
+
+#define gpio_get_value  __gpio_get_value
+#define gpio_set_value  __gpio_set_value
+#define gpio_cansleep   __gpio_cansleep
+#define gpio_to_irq     __gpio_to_irq
+
+/* GPIO bank sizes */
+#define S5P6442_GPIO_A0_NR      (8)
+#define S5P6442_GPIO_A1_NR      (2)
+#define S5P6442_GPIO_B_NR       (4)
+#define S5P6442_GPIO_C0_NR      (5)
+#define S5P6442_GPIO_C1_NR      (5)
+#define S5P6442_GPIO_D0_NR      (2)
+#define S5P6442_GPIO_D1_NR      (6)
+#define S5P6442_GPIO_E0_NR      (8)
+#define S5P6442_GPIO_E1_NR      (5)
+#define S5P6442_GPIO_F0_NR      (8)
+#define S5P6442_GPIO_F1_NR      (8)
+#define S5P6442_GPIO_F2_NR      (8)
+#define S5P6442_GPIO_F3_NR      (6)
+#define S5P6442_GPIO_G0_NR      (7)
+#define S5P6442_GPIO_G1_NR      (7)
+#define S5P6442_GPIO_G2_NR      (7)
+#define S5P6442_GPIO_H0_NR      (8)
+#define S5P6442_GPIO_H1_NR      (8)
+#define S5P6442_GPIO_H2_NR      (8)
+#define S5P6442_GPIO_H3_NR      (8)
+#define S5P6442_GPIO_J0_NR      (8)
+#define S5P6442_GPIO_J1_NR      (6)
+#define S5P6442_GPIO_J2_NR      (8)
+#define S5P6442_GPIO_J3_NR      (8)
+#define S5P6442_GPIO_J4_NR      (5)
+
+/* GPIO bank numbers */
+
+/* CONFIG_S3C_GPIO_SPACE allows the user to select extra
+ * space for debugging purposes so that any accidental
+ * change from one gpio bank to another can be caught.
+*/
+
+#define S5P6442_GPIO_NEXT(__gpio) \
+        ((__gpio##_START) + (__gpio##_NR) + CONFIG_S3C_GPIO_SPACE + 1)
+
+enum s5p_gpio_number {
+        S5P6442_GPIO_A0_START   = 0,
+        S5P6442_GPIO_A1_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_A0),
+        S5P6442_GPIO_B_START    = S5P6442_GPIO_NEXT(S5P6442_GPIO_A1),
+        S5P6442_GPIO_C0_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_B),
+        S5P6442_GPIO_C1_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_C0),
+        S5P6442_GPIO_D0_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_C1),
+        S5P6442_GPIO_D1_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_D0),
+        S5P6442_GPIO_E0_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_D1),
+        S5P6442_GPIO_E1_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_E0),
+        S5P6442_GPIO_F0_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_E1),
+        S5P6442_GPIO_F1_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_F0),
+        S5P6442_GPIO_F2_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_F1),
+        S5P6442_GPIO_F3_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_F2),
+        S5P6442_GPIO_G0_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_F3),
+        S5P6442_GPIO_G1_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_G0),
+        S5P6442_GPIO_G2_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_G1),
+        S5P6442_GPIO_H0_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_G2),
+        S5P6442_GPIO_H1_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_H0),
+        S5P6442_GPIO_H2_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_H1),
+        S5P6442_GPIO_H3_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_H2),
+        S5P6442_GPIO_J0_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_H3),
+        S5P6442_GPIO_J1_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_J0),
+        S5P6442_GPIO_J2_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_J1),
+        S5P6442_GPIO_J3_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_J2),
+        S5P6442_GPIO_J4_START   = S5P6442_GPIO_NEXT(S5P6442_GPIO_J3),
+};
+
+/* S5P6442 GPIO number definitions. */
+#define S5P6442_GPA0(_nr)       (S5P6442_GPIO_A0_START + (_nr))
+#define S5P6442_GPA1(_nr)       (S5P6442_GPIO_A1_START + (_nr))
+#define S5P6442_GPB(_nr)        (S5P6442_GPIO_B_START + (_nr))
+#define S5P6442_GPC0(_nr)       (S5P6442_GPIO_C0_START + (_nr))
+#define S5P6442_GPC1(_nr)       (S5P6442_GPIO_C1_START + (_nr))
+#define S5P6442_GPD0(_nr)       (S5P6442_GPIO_D0_START + (_nr))
+#define S5P6442_GPD1(_nr)       (S5P6442_GPIO_D1_START + (_nr))
+#define S5P6442_GPE0(_nr)       (S5P6442_GPIO_E0_START + (_nr))
+#define S5P6442_GPE1(_nr)       (S5P6442_GPIO_E1_START + (_nr))
+#define S5P6442_GPF0(_nr)       (S5P6442_GPIO_F0_START + (_nr))
+#define S5P6442_GPF1(_nr)       (S5P6442_GPIO_F1_START + (_nr))
+#define S5P6442_GPF2(_nr)       (S5P6442_GPIO_F2_START + (_nr))
+#define S5P6442_GPF3(_nr)       (S5P6442_GPIO_F3_START + (_nr))
+#define S5P6442_GPG0(_nr)       (S5P6442_GPIO_G0_START + (_nr))
+#define S5P6442_GPG1(_nr)       (S5P6442_GPIO_G1_START + (_nr))
+#define S5P6442_GPG2(_nr)       (S5P6442_GPIO_G2_START + (_nr))
+#define S5P6442_GPH0(_nr)       (S5P6442_GPIO_H0_START + (_nr))
+#define S5P6442_GPH1(_nr)       (S5P6442_GPIO_H1_START + (_nr))
+#define S5P6442_GPH2(_nr)       (S5P6442_GPIO_H2_START + (_nr))
+#define S5P6442_GPH3(_nr)       (S5P6442_GPIO_H3_START + (_nr))
+#define S5P6442_GPJ0(_nr)       (S5P6442_GPIO_J0_START + (_nr))
+#define S5P6442_GPJ1(_nr)       (S5P6442_GPIO_J1_START + (_nr))
+#define S5P6442_GPJ2(_nr)       (S5P6442_GPIO_J2_START + (_nr))
+#define S5P6442_GPJ3(_nr)       (S5P6442_GPIO_J3_START + (_nr))
+#define S5P6442_GPJ4(_nr)       (S5P6442_GPIO_J4_START + (_nr))
+
+/* the end of the S5P6442 specific gpios */
+#define S5P6442_GPIO_END        (S5P6442_GPJ4(S5P6442_GPIO_J4_NR) + 1)
+#define S3C_GPIO_END            S5P6442_GPIO_END
+
+/* define the number of gpios we need to the one after the GPJ4() range */
+#define ARCH_NR_GPIOS           (S5P6442_GPJ4(S5P6442_GPIO_J4_NR) +     \
+                                 CONFIG_SAMSUNG_GPIO_EXTRA + 1)
+
+#include <asm-generic/gpio.h>
+
+#endif /* __ASM_ARCH_GPIO_H */
diff --git a/arch/arm/mach-s5p6442/include/mach/hardware.h b/arch/arm/mach-s5p6442/include/mach/hardware.h
new file mode 100644
index 000000000000..8cd7b67b49d4
--- /dev/null
+++ b/arch/arm/mach-s5p6442/include/mach/hardware.h
@@ -0,0 +1,18 @@
+/* linux/arch/arm/mach-s5p6442/include/mach/hardware.h
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com/
+ *
+ * S5P6442 - Hardware support
+ *
+ * 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.
+*/
+
+#ifndef __ASM_ARCH_HARDWARE_H
+#define __ASM_ARCH_HARDWARE_H __FILE__
+
+/* currently nothing here, placeholder */
+
+#endif /* __ASM_ARCH_HARDWARE_H */
diff --git a/arch/arm/mach-s5p6442/include/mach/map.h b/arch/arm/mach-s5p6442/include/mach/map.h
new file mode 100644
index 000000000000..685277d792fb
--- /dev/null
+++ b/arch/arm/mach-s5p6442/include/mach/map.h
@@ -0,0 +1,58 @@
+/* linux/arch/arm/mach-s5p6442/include/mach/map.h
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com/
+ *
+ * S5P6442 - Memory map definitions
+ *
+ * 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.
+*/
+
+#ifndef __ASM_ARCH_MAP_H
+#define __ASM_ARCH_MAP_H __FILE__
+
+#include <plat/map-base.h>
+#include <plat/map-s5p.h>
+
+#define S5P6442_PA_CHIPID       (0xE0000000)
+#define S5P_PA_CHIPID           S5P6442_PA_CHIPID
+
+#define S5P6442_PA_SYSCON       (0xE0100000)
+#define S5P_PA_SYSCON           S5P6442_PA_SYSCON
+
+#define S5P6442_PA_GPIO         (0xE0200000)
+#define S5P_PA_GPIO             S5P6442_PA_GPIO
+
+#define S5P6442_PA_VIC0         (0xE4000000)
+#define S5P_PA_VIC0             S5P6442_PA_VIC0
+
+#define S5P6442_PA_VIC1         (0xE4100000)
+#define S5P_PA_VIC1             S5P6442_PA_VIC1
+
+#define S5P6442_PA_VIC2         (0xE4200000)
+#define S5P_PA_VIC2             S5P6442_PA_VIC2
+
+#define S5P6442_PA_TIMER        (0xEA000000)
+#define S5P_PA_TIMER            S5P6442_PA_TIMER
+
+#define S5P6442_PA_SYSTIMER     (0xEA100000)
+
+#define S5P6442_PA_UART         (0xEC000000)
+
+#define S5P_PA_UART0            (S5P6442_PA_UART + 0x0)
+#define S5P_PA_UART1            (S5P6442_PA_UART + 0x400)
+#define S5P_PA_UART2            (S5P6442_PA_UART + 0x800)
+#define S5P_SZ_UART             SZ_256
+
+#define S5P6442_PA_IIC0         (0xEC100000)
+
+#define S5P6442_PA_SDRAM        (0x20000000)
+#define S5P_PA_SDRAM            S5P6442_PA_SDRAM
+
+/* compatibiltiy defines. */
+#define S3C_PA_UART             S5P6442_PA_UART
+#define S3C_PA_IIC              S5P6442_PA_IIC0
+
+#endif /* __ASM_ARCH_MAP_H */
diff --git a/arch/arm/mach-s5p6442/include/mach/memory.h b/arch/arm/mach-s5p6442/include/mach/memory.h
new file mode 100644
index 000000000000..9ddd877ba2ea
--- /dev/null
+++ b/arch/arm/mach-s5p6442/include/mach/memory.h
@@ -0,0 +1,19 @@
+/* linux/arch/arm/mach-s5p6442/include/mach/memory.h
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com/
+ *
+ * S5P6442 - Memory definitions
+ *
+ * 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.
+*/
+
+#ifndef __ASM_ARCH_MEMORY_H
+#define __ASM_ARCH_MEMORY_H
+
+#define PHYS_OFFSET             UL(0x20000000)
+#define CONSISTENT_DMA_SIZE     SZ_8M
+
+#endif /* __ASM_ARCH_MEMORY_H */
diff --git a/arch/arm/mach-s5p6442/include/mach/system.h b/arch/arm/mach-s5p6442/include/mach/system.h
new file mode 100644
index 000000000000..8bcd8ed0c3c3
--- /dev/null
+++ b/arch/arm/mach-s5p6442/include/mach/system.h
@@ -0,0 +1,26 @@
+/* linux/arch/arm/mach-s5p6442/include/mach/system.h
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com/
+ *
+ * S5P6442 - system support header
+ *
+ * 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.
+*/
+
+#ifndef __ASM_ARCH_SYSTEM_H
+#define __ASM_ARCH_SYSTEM_H __FILE__
+
+static void arch_idle(void)
+{
+        /* nothing here yet */
+}
+
+static void arch_reset(char mode, const char *cmd)
+{
+        /* nothing here yet */
+}
+
+#endif /* __ASM_ARCH_SYSTEM_H */
diff --git a/arch/arm/mach-s5p6442/include/mach/uncompress.h b/arch/arm/mach-s5p6442/include/mach/uncompress.h
new file mode 100644
index 000000000000..5ac7cbeeb987
--- /dev/null
+++ b/arch/arm/mach-s5p6442/include/mach/uncompress.h
@@ -0,0 +1,24 @@
+/* linux/arch/arm/mach-s5p6442/include/mach/uncompress.h
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com/
+ *
+ * S5P6442 - uncompress code
+ *
+ * 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.
+*/
+
+#ifndef __ASM_ARCH_UNCOMPRESS_H
+#define __ASM_ARCH_UNCOMPRESS_H
+
+#include <mach/map.h>
+#include <plat/uncompress.h>
+
+static void arch_detect_cpu(void)
+{
+        /* we do not need to do any cpu detection here at the moment. */
+}
+
+#endif /* __ASM_ARCH_UNCOMPRESS_H */
diff --git a/arch/arm/mach-s5p6442/init.c b/arch/arm/mach-s5p6442/init.c
new file mode 100644
index 000000000000..1874bdb71e1d
--- /dev/null
+++ b/arch/arm/mach-s5p6442/init.c
@@ -0,0 +1,44 @@
+/* linux/arch/arm/mach-s5p6442/s5p6442-init.c
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com/
+ *
+ * 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/kernel.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/serial_core.h>
+
+#include <plat/cpu.h>
+#include <plat/devs.h>
+#include <plat/s5p6442.h>
+#include <plat/regs-serial.h>
+
+static struct s3c24xx_uart_clksrc s5p6442_serial_clocks[] = {
+        [0] = {
+                .name           = "pclk",
+                .divisor        = 1,
+                .min_baud       = 0,
+                .max_baud       = 0,
+        },
+};
+
+/* uart registration process */
+void __init s5p6442_common_init_uarts(struct s3c2410_uartcfg *cfg, int no)
+{
+        struct s3c2410_uartcfg *tcfg = cfg;
+        u32 ucnt;
+
+        for (ucnt = 0; ucnt < no; ucnt++, tcfg++) {
+                if (!tcfg->clocks) {
+                        tcfg->clocks = s5p6442_serial_clocks;
+                        tcfg->clocks_size = ARRAY_SIZE(s5p6442_serial_clocks);
+                }
+        }
+
+        s3c24xx_init_uartdevs("s5pv210-uart", s5p_uart_resources, cfg, no);
+}
diff --git a/arch/arm/plat-s5p/cpu.c b/arch/arm/plat-s5p/cpu.c
index ee9c6b302ded..e69992488e2e 100644
--- a/arch/arm/plat-s5p/cpu.c
+++ b/arch/arm/plat-s5p/cpu.c
@@ -18,10 +18,12 @@
 #include <mach/regs-clock.h>
 #include <plat/cpu.h>
 #include <plat/s5p6440.h>
+#include <plat/s5p6442.h>
 
 /* table of supported CPUs */
 
 static const char name_s5p6440[] = "S5P6440";
+static const char name_s5p6442[] = "S5P6442";
 
 static struct cpu_table cpu_ids[] __initdata = {
         {
@@ -32,6 +34,14 @@ static struct cpu_table cpu_ids[] __initdata = {
                 .init_uarts     = s5p6440_init_uarts,
                 .init           = s5p6440_init,
                 .name           = name_s5p6440,
+        }, {
+                .idcode         = 0x36442000,
+                .idmask         = 0xffffff00,
+                .map_io         = s5p6442_map_io,
+                .init_clocks    = s5p6442_init_clocks,
+                .init_uarts     = s5p6442_init_uarts,
+                .init           = s5p6442_init,
+                .name           = name_s5p6442,
         },
 };
 
diff --git a/arch/arm/plat-s5p/include/plat/map-s5p.h b/arch/arm/plat-s5p/include/plat/map-s5p.h
index 51d9cb5a3e2b..cc60604591dc 100644
--- a/arch/arm/plat-s5p/include/plat/map-s5p.h
+++ b/arch/arm/plat-s5p/include/plat/map-s5p.h
@@ -28,5 +28,6 @@
 #define VA_VIC(x)               (S3C_VA_IRQ + ((x) * 0x10000))
 #define VA_VIC0                 VA_VIC(0)
 #define VA_VIC1                 VA_VIC(1)
+#define VA_VIC2                 VA_VIC(2)
 
 #endif /* __ASM_PLAT_MAP_S5P_H */
diff --git a/arch/arm/plat-s5p/include/plat/s5p6442.h b/arch/arm/plat-s5p/include/plat/s5p6442.h
new file mode 100644
index 000000000000..7b8801349c94
--- /dev/null
+++ b/arch/arm/plat-s5p/include/plat/s5p6442.h
@@ -0,0 +1,33 @@
+/* arch/arm/plat-s5p/include/plat/s5p6442.h
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com/
+ *
+ * Header file for s5p6442 cpu support
+ *
+ * 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.
+*/
+
+/* Common init code for S5P6442 related SoCs */
+
+extern void s5p6442_common_init_uarts(struct s3c2410_uartcfg *cfg, int no);
+extern void s5p6442_register_clocks(void);
+extern void s5p6442_setup_clocks(void);
+
+#ifdef CONFIG_CPU_S5P6442
+
+extern  int s5p6442_init(void);
+extern void s5p6442_init_irq(void);
+extern void s5p6442_map_io(void);
+extern void s5p6442_init_clocks(int xtal);
+
+#define s5p6442_init_uarts s5p6442_common_init_uarts
+
+#else
+#define s5p6442_init_clocks NULL
+#define s5p6442_init_uarts NULL
+#define s5p6442_map_io NULL
+#define s5p6442_init NULL
+#endif
diff --git a/arch/arm/plat-samsung/include/plat/debug-macro.S b/arch/arm/plat-samsung/include/plat/debug-macro.S
index 43ed0ec25f85..dc6efd90e8ff 100644
--- a/arch/arm/plat-samsung/include/plat/debug-macro.S
+++ b/arch/arm/plat-samsung/include/plat/debug-macro.S
@@ -11,6 +11,18 @@
 
 #include <plat/regs-serial.h>
 
+/* The S5PV210/S5PC110 and S5P6442 implementations are as belows. */
+
+        .macro fifo_level_s5pv210 rd, rx
+                ldr     \rd, [ \rx, # S3C2410_UFSTAT ]
+                and     \rd, \rd, #S5PV210_UFSTAT_TXMASK
+        .endm
+
+        .macro  fifo_full_s5pv210 rd, rx
+                ldr     \rd, [ \rx, # S3C2410_UFSTAT ]
+                tst     \rd, #S5PV210_UFSTAT_TXFULL
+        .endm
+
 /* The S3C2440 implementations are used by default as they are the
  * most widely re-used */