[ARM] 4461/1: MXC platform and i.MX31ADS core support

This patch adds the foundation pieces for
the Freescale MXC platforms, including
i.MX2 and i.MX3 based systems.

The bare-bones MX31 support in this patch
boots to the rootdev panic with 8250 serial
console configured "console=ttyS0,115200".
It assumes that Redboot is the boot loader.

Signed-off-by: Quinn Jensen <[e-mail]>
Acked-by: Lennert Buytenhek <[e-mail]>
Signed-off-by: Russell King <[e-mail]>

arch/arm/Kconfig

···
 
 	  <http://www.digi.com/products/microprocessors/index.jsp>
 
+config ARCH_MXC
+	bool "Freescale MXC/iMX-based"
+	select ARCH_MTD_XIP
+	help
+	  Support for Freescale MXC/iMX-based family of processors
+
 config ARCH_PNX4008
 	bool "Philips Nexperia PNX4008 Mobile"
 	help
···
 source "arch/arm/mach-realview/Kconfig"
 
 source "arch/arm/mach-at91/Kconfig"
+
+source "arch/arm/plat-mxc/Kconfig"
 
 source "arch/arm/mach-netx/Kconfig"
 

arch/arm/Makefile

···
  textofs-$(CONFIG_ARCH_NS9XXX)	   := 0x00108000
  machine-$(CONFIG_ARCH_DAVINCI)	   := davinci
  machine-$(CONFIG_ARCH_KS8695)     := ks8695
+  incdir-$(CONFIG_ARCH_MXC)	   := mxc
+ machine-$(CONFIG_ARCH_MX3)	   := mx3
 
 ifeq ($(CONFIG_ARCH_EBSA110),y)
 # This is what happens if you forget the IOCS16 line.
···
 core-$(CONFIG_PLAT_IOP)		+= arch/arm/plat-iop/
 core-$(CONFIG_ARCH_OMAP)	+= arch/arm/plat-omap/
 core-$(CONFIG_PLAT_S3C24XX)		+= arch/arm/plat-s3c24xx/
+core-$(CONFIG_ARCH_MXC)		+= arch/arm/plat-mxc/
 
 drivers-$(CONFIG_OPROFILE)      += arch/arm/oprofile/
 drivers-$(CONFIG_ARCH_CLPS7500)	+= drivers/acorn/char/

arch/arm/mach-mx3/Kconfig

···
+menu "MX3 Options"
+	depends on ARCH_MX3
+
+config MACH_MX31ADS
+	bool "Support MX31ADS platforms"
+	default y
+	help
+	  Include support for MX31ADS platform. This includes specific
+	  configurations for the board and its peripherals.
+
+endmenu
+

arch/arm/mach-mx3/Makefile

···
+#
+# Makefile for the linux kernel.
+#
+
+# Object file lists.
+
+obj-y			:= mm.o time.o
+obj-$(CONFIG_MACH_MX31ADS)	+= mx31ads.o

arch/arm/mach-mx3/Makefile.boot

···
+   zreladdr-y	:= 0x80008000
+params_phys-y	:= 0x80000100
+initrd_phys-y	:= 0x80800000

arch/arm/mach-mx3/mm.c

···
+/*
+ *  Copyright (C) 1999,2000 Arm Limited
+ *  Copyright (C) 2000 Deep Blue Solutions Ltd
+ *  Copyright (C) 2002 Shane Nay ([e-mail])
+ *  Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ *    - add MX31 specific definitions
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/mm.h>
+#include <linux/init.h>
+#include <asm/hardware.h>
+#include <asm/pgtable.h>
+#include <asm/mach/map.h>
+#include <asm/arch/common.h>
+
+/*!
+ * @file mm.c
+ *
+ * @brief This file creates static virtual to physical mappings, common to all MX3 boards.
+ *
+ * @ingroup Memory
+ */
+
+/*!
+ * This table defines static virtual address mappings for I/O regions.
+ * These are the mappings common across all MX3 boards.
+ */
+static struct map_desc mxc_io_desc[] __initdata = {
+	{
+		.virtual	= X_MEMC_BASE_ADDR_VIRT,
+		.pfn		= __phys_to_pfn(X_MEMC_BASE_ADDR),
+		.length		= X_MEMC_SIZE,
+		.type		= MT_DEVICE
+	}, {
+		.virtual	= AVIC_BASE_ADDR_VIRT,
+		.pfn		= __phys_to_pfn(AVIC_BASE_ADDR),
+		.length		= AVIC_SIZE,
+		.type		= MT_NONSHARED_DEVICE
+	},
+};
+
+/*!
+ * This function initializes the memory map. It is called during the
+ * system startup to create static physical to virtual memory mappings
+ * for the IO modules.
+ */
+void __init mxc_map_io(void)
+{
+	iotable_init(mxc_io_desc, ARRAY_SIZE(mxc_io_desc));
+}

arch/arm/mach-mx3/mx31ads.c

···
+/*
+ *  Copyright (C) 2000 Deep Blue Solutions Ltd
+ *  Copyright (C) 2002 Shane Nay ([e-mail])
+ *  Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/clk.h>
+#include <linux/serial_8250.h>
+
+#include <asm/hardware.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/memory.h>
+#include <asm/mach/map.h>
+#include <asm/arch/common.h>
+
+/*!
+ * @file mx31ads.c
+ *
+ * @brief This file contains the board-specific initialization routines.
+ *
+ * @ingroup System
+ */
+
+#if defined(CONFIG_SERIAL_8250) || defined(CONFIG_SERIAL_8250_MODULE)
+/*!
+ * The serial port definition structure.
+ */
+static struct plat_serial8250_port serial_platform_data[] = {
+	{
+		.membase  = (void *)(PBC_BASE_ADDRESS + PBC_SC16C652_UARTA),
+		.mapbase  = (unsigned long)(CS4_BASE_ADDR + PBC_SC16C652_UARTA),
+		.irq      = EXPIO_INT_XUART_INTA,
+		.uartclk  = 14745600,
+		.regshift = 0,
+		.iotype   = UPIO_MEM,
+		.flags    = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ,
+	}, {
+		.membase  = (void *)(PBC_BASE_ADDRESS + PBC_SC16C652_UARTB),
+		.mapbase  = (unsigned long)(CS4_BASE_ADDR + PBC_SC16C652_UARTB),
+		.irq      = EXPIO_INT_XUART_INTB,
+		.uartclk  = 14745600,
+		.regshift = 0,
+		.iotype   = UPIO_MEM,
+		.flags    = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ,
+	},
+	{},
+};
+
+static struct platform_device serial_device = {
+	.name	= "serial8250",
+	.id	= 0,
+	.dev	= {
+		.platform_data = serial_platform_data,
+	},
+};
+
+static int __init mxc_init_extuart(void)
+{
+	return platform_device_register(&serial_device);
+}
+#else
+static inline int mxc_init_extuart(void)
+{
+	return 0;
+}
+#endif
+
+/*!
+ * This structure defines static mappings for the i.MX31ADS board.
+ */
+static struct map_desc mx31ads_io_desc[] __initdata = {
+	{
+		.virtual	= AIPS1_BASE_ADDR_VIRT,
+		.pfn		= __phys_to_pfn(AIPS1_BASE_ADDR),
+		.length		= AIPS1_SIZE,
+		.type		= MT_NONSHARED_DEVICE
+	}, {
+		.virtual	= SPBA0_BASE_ADDR_VIRT,
+		.pfn		= __phys_to_pfn(SPBA0_BASE_ADDR),
+		.length		= SPBA0_SIZE,
+		.type		= MT_NONSHARED_DEVICE
+	}, {
+		.virtual	= AIPS2_BASE_ADDR_VIRT,
+		.pfn		= __phys_to_pfn(AIPS2_BASE_ADDR),
+		.length		= AIPS2_SIZE,
+		.type		= MT_NONSHARED_DEVICE
+	}, {
+		.virtual	= CS4_BASE_ADDR_VIRT,
+		.pfn		= __phys_to_pfn(CS4_BASE_ADDR),
+		.length		= CS4_SIZE / 2,
+		.type		= MT_DEVICE
+	},
+};
+
+/*!
+ * Set up static virtual mappings.
+ */
+void __init mx31ads_map_io(void)
+{
+	mxc_map_io();
+	iotable_init(mx31ads_io_desc, ARRAY_SIZE(mx31ads_io_desc));
+}
+
+/*!
+ * Board specific initialization.
+ */
+static void __init mxc_board_init(void)
+{
+	mxc_init_extuart();
+}
+
+/*
+ * The following uses standard kernel macros defined in arch.h in order to
+ * initialize __mach_desc_MX31ADS data structure.
+ */
+MACHINE_START(MX31ADS, "Freescale MX31ADS")
+	/* Maintainer: Freescale Semiconductor, Inc. */
+	.phys_io	= AIPS1_BASE_ADDR,
+	.io_pg_offst	= ((AIPS1_BASE_ADDR_VIRT) >> 18) & 0xfffc,
+	.boot_params    = PHYS_OFFSET + 0x100,
+	.map_io         = mx31ads_map_io,
+	.init_irq       = mxc_init_irq,
+	.init_machine   = mxc_board_init,
+	.timer          = &mxc_timer,
+MACHINE_END

arch/arm/mach-mx3/time.c

···
+/*
+ * System Timer Interrupt reconfigured to run in free-run mode.
+ * Author: Vitaly Wool
+ * Copyright 2004 MontaVista Software Inc.
+ * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * 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.
+ */
+
+/*!
+ * @file time.c
+ * @brief This file contains OS tick and wdog timer implementations.
+ *
+ * This file contains OS tick and wdog timer implementations.
+ *
+ * @ingroup Timers
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <asm/hardware.h>
+#include <asm/mach/time.h>
+#include <asm/io.h>
+#include <asm/arch/common.h>
+
+/*!
+ * This is the timer interrupt service routine to do required tasks.
+ * It also services the WDOG timer at the frequency of twice per WDOG
+ * timeout value. For example, if the WDOG's timeout value is 4 (2
+ * seconds since the WDOG runs at 0.5Hz), it will be serviced once
+ * every 2/2=1 second.
+ *
+ * @param  irq          GPT interrupt source number (not used)
+ * @param  dev_id       this parameter is not used
+ * @return always returns \b IRQ_HANDLED as defined in
+ *         include/linux/interrupt.h.
+ */
+static irqreturn_t mxc_timer_interrupt(int irq, void *dev_id)
+{
+	unsigned int next_match;
+
+	write_seqlock(&xtime_lock);
+
+	if (__raw_readl(MXC_GPT_GPTSR) & GPTSR_OF1) {
+		do {
+			timer_tick();
+			next_match = __raw_readl(MXC_GPT_GPTOCR1) + LATCH;
+			__raw_writel(GPTSR_OF1, MXC_GPT_GPTSR);
+			__raw_writel(next_match, MXC_GPT_GPTOCR1);
+		} while ((signed long)(next_match -
+				       __raw_readl(MXC_GPT_GPTCNT)) <= 0);
+	}
+
+	write_sequnlock(&xtime_lock);
+
+	return IRQ_HANDLED;
+}
+
+/*!
+ * This function is used to obtain the number of microseconds since the last
+ * timer interrupt. Note that interrupts is disabled by do_gettimeofday().
+ *
+ * @return the number of microseconds since the last timer interrupt.
+ */
+static unsigned long mxc_gettimeoffset(void)
+{
+	unsigned long ticks_to_match, elapsed, usec, tick_usec, i;
+
+	/* Get ticks before next timer match */
+	ticks_to_match =
+	    __raw_readl(MXC_GPT_GPTOCR1) - __raw_readl(MXC_GPT_GPTCNT);
+
+	/* We need elapsed ticks since last match */
+	elapsed = LATCH - ticks_to_match;
+
+	/* Now convert them to usec */
+	/* Insure no overflow when calculating the usec below */
+	for (i = 1, tick_usec = tick_nsec / 1000;; i *= 2) {
+		tick_usec /= i;
+		if ((0xFFFFFFFF / tick_usec) > elapsed)
+			break;
+	}
+	usec = (unsigned long)(elapsed * tick_usec) / (LATCH / i);
+
+	return usec;
+}
+
+/*!
+ * The OS tick timer interrupt structure.
+ */
+static struct irqaction timer_irq = {
+	.name = "MXC Timer Tick",
+	.flags = IRQF_DISABLED | IRQF_TIMER,
+	.handler = mxc_timer_interrupt
+};
+
+/*!
+ * This function is used to initialize the GPT to produce an interrupt
+ * based on HZ.  It is called by start_kernel() during system startup.
+ */
+void __init mxc_init_time(void)
+{
+	u32 reg, v;
+	reg = __raw_readl(MXC_GPT_GPTCR);
+	reg &= ~GPTCR_ENABLE;
+	__raw_writel(reg, MXC_GPT_GPTCR);
+	reg |= GPTCR_SWR;
+	__raw_writel(reg, MXC_GPT_GPTCR);
+
+	while ((__raw_readl(MXC_GPT_GPTCR) & GPTCR_SWR) != 0)
+		cpu_relax();
+
+	reg = GPTCR_FRR | GPTCR_CLKSRC_HIGHFREQ;
+	__raw_writel(reg, MXC_GPT_GPTCR);
+
+	/* TODO: get timer rate from clk driver */
+	v = 66500000;
+
+	__raw_writel((v / CLOCK_TICK_RATE) - 1, MXC_GPT_GPTPR);
+
+	if ((v % CLOCK_TICK_RATE) != 0) {
+		pr_info("\nWARNING: Can't generate CLOCK_TICK_RATE at %d Hz\n",
+			CLOCK_TICK_RATE);
+	}
+	pr_info("Actual CLOCK_TICK_RATE is %d Hz\n",
+		v / ((__raw_readl(MXC_GPT_GPTPR) & 0xFFF) + 1));
+
+	reg = __raw_readl(MXC_GPT_GPTCNT);
+	reg += LATCH;
+	__raw_writel(reg, MXC_GPT_GPTOCR1);
+
+	setup_irq(MXC_INT_GPT, &timer_irq);
+
+	reg = __raw_readl(MXC_GPT_GPTCR);
+	reg =
+	    GPTCR_FRR | GPTCR_CLKSRC_HIGHFREQ | GPTCR_STOPEN | GPTCR_DOZEN |
+	    GPTCR_WAITEN | GPTCR_ENMOD | GPTCR_ENABLE;
+	__raw_writel(reg, MXC_GPT_GPTCR);
+
+	__raw_writel(GPTIR_OF1IE, MXC_GPT_GPTIR);
+}
+
+struct sys_timer mxc_timer = {
+	.init = mxc_init_time,
+	.offset = mxc_gettimeoffset,
+};

arch/arm/mm/Kconfig

···
 # ARMv6
 config CPU_V6
 	bool "Support ARM V6 processor"
-	depends on ARCH_INTEGRATOR || MACH_REALVIEW_EB || ARCH_OMAP2
+	depends on ARCH_INTEGRATOR || MACH_REALVIEW_EB || ARCH_OMAP2 || ARCH_MX3
+	default y if ARCH_MX3
 	select CPU_32v6
 	select CPU_ABRT_EV6
 	select CPU_CACHE_V6
···
 config CPU_32v6K
 	bool "Support ARM V6K processor extensions" if !SMP
 	depends on CPU_V6
-	default y if SMP
+	default y if SMP && !ARCH_MX3
 	help
 	  Say Y here if your ARMv6 processor supports the 'K' extension.
 	  This enables the kernel to use some instructions not present

arch/arm/plat-mxc/Kconfig

···
+if ARCH_MXC
+
+menu "Freescale MXC Implementations"
+
+choice
+	prompt "MXC/iMX System Type"
+	default 0
+
+config ARCH_MX3
+	bool "MX3-based"
+	help
+	  This enables support for systems based on the Freescale i.MX3 family
+
+endchoice
+
+source "arch/arm/mach-mx3/Kconfig"
+
+endmenu
+
+endif

arch/arm/plat-mxc/Makefile

···
+#
+# Makefile for the linux kernel.
+#
+
+# Common support
+obj-y := irq.o
+
+obj-m :=
+obj-n :=
+obj-  :=

arch/arm/plat-mxc/irq.c

···
+/*
+ *  Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * 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/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/mach/irq.h>
+#include <asm/arch/common.h>
+
+/*!
+ * Disable interrupt number "irq" in the AVIC
+ *
+ * @param  irq          interrupt source number
+ */
+static void mxc_mask_irq(unsigned int irq)
+{
+	__raw_writel(irq, AVIC_INTDISNUM);
+}
+
+/*!
+ * Enable interrupt number "irq" in the AVIC
+ *
+ * @param  irq          interrupt source number
+ */
+static void mxc_unmask_irq(unsigned int irq)
+{
+	__raw_writel(irq, AVIC_INTENNUM);
+}
+
+static struct irq_chip mxc_avic_chip = {
+	.mask_ack = mxc_mask_irq,
+	.mask = mxc_mask_irq,
+	.unmask = mxc_unmask_irq,
+};
+
+/*!
+ * This function initializes the AVIC hardware and disables all the
+ * interrupts. It registers the interrupt enable and disable functions
+ * to the kernel for each interrupt source.
+ */
+void __init mxc_init_irq(void)
+{
+	int i;
+	u32 reg;
+
+	/* put the AVIC into the reset value with
+	 * all interrupts disabled
+	 */
+	__raw_writel(0, AVIC_INTCNTL);
+	__raw_writel(0x1f, AVIC_NIMASK);
+
+	/* disable all interrupts */
+	__raw_writel(0, AVIC_INTENABLEH);
+	__raw_writel(0, AVIC_INTENABLEL);
+
+	/* all IRQ no FIQ */
+	__raw_writel(0, AVIC_INTTYPEH);
+	__raw_writel(0, AVIC_INTTYPEL);
+	for (i = 0; i < MXC_MAX_INT_LINES; i++) {
+		set_irq_chip(i, &mxc_avic_chip);
+		set_irq_handler(i, handle_level_irq);
+		set_irq_flags(i, IRQF_VALID);
+	}
+
+	/* Set WDOG2's interrupt the highest priority level (bit 28-31) */
+	reg = __raw_readl(AVIC_NIPRIORITY6);
+	reg |= (0xF << 28);
+	__raw_writel(reg, AVIC_NIPRIORITY6);
+
+	printk(KERN_INFO "MXC IRQ initialized\n");
+}

include/asm-arm/arch-mxc/board-mx31ads.h

···
+/*
+ * Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * 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_MXC_BOARD_MX31ADS_H__
+#define __ASM_ARCH_MXC_BOARD_MX31ADS_H__
+
+/*!
+ * @name PBC Controller parameters
+ */
+/*! @{ */
+/*!
+ * Base address of PBC controller
+ */
+#define PBC_BASE_ADDRESS        IO_ADDRESS(CS4_BASE_ADDR)
+/* Offsets for the PBC Controller register */
+/*!
+ * PBC Board status register offset
+ */
+#define PBC_BSTAT               0x000002
+/*!
+ * PBC Board control register 1 set address.
+ */
+#define PBC_BCTRL1_SET          0x000004
+/*!
+ * PBC Board control register 1 clear address.
+ */
+#define PBC_BCTRL1_CLEAR        0x000006
+/*!
+ * PBC Board control register 2 set address.
+ */
+#define PBC_BCTRL2_SET          0x000008
+/*!
+ * PBC Board control register 2 clear address.
+ */
+#define PBC_BCTRL2_CLEAR        0x00000A
+/*!
+ * PBC Board control register 3 set address.
+ */
+#define PBC_BCTRL3_SET          0x00000C
+/*!
+ * PBC Board control register 3 clear address.
+ */
+#define PBC_BCTRL3_CLEAR        0x00000E
+/*!
+ * PBC Board control register 4 set address.
+ */
+#define PBC_BCTRL4_SET          0x000010
+/*!
+ * PBC Board control register 4 clear address.
+ */
+#define PBC_BCTRL4_CLEAR        0x000012
+/*!
+ * PBC Board status register 1.
+ */
+#define PBC_BSTAT1              0x000014
+/*!
+ * PBC Board interrupt status register.
+ */
+#define PBC_INTSTATUS           0x000016
+/*!
+ * PBC Board interrupt current status register.
+ */
+#define PBC_INTCURR_STATUS      0x000018
+/*!
+ * PBC Interrupt mask register set address.
+ */
+#define PBC_INTMASK_SET         0x00001A
+/*!
+ * PBC Interrupt mask register clear address.
+ */
+#define PBC_INTMASK_CLEAR       0x00001C
+
+/*!
+ * External UART A.
+ */
+#define PBC_SC16C652_UARTA      0x010000
+/*!
+ * External UART B.
+ */
+#define PBC_SC16C652_UARTB      0x010010
+/*!
+ * Ethernet Controller IO base address.
+ */
+#define PBC_CS8900A_IOBASE      0x020000
+/*!
+ * Ethernet Controller Memory base address.
+ */
+#define PBC_CS8900A_MEMBASE     0x021000
+/*!
+ * Ethernet Controller DMA base address.
+ */
+#define PBC_CS8900A_DMABASE     0x022000
+/*!
+ * External chip select 0.
+ */
+#define PBC_XCS0                0x040000
+/*!
+ * LCD Display enable.
+ */
+#define PBC_LCD_EN_B            0x060000
+/*!
+ * Code test debug enable.
+ */
+#define PBC_CODE_B              0x070000
+/*!
+ * PSRAM memory select.
+ */
+#define PBC_PSRAM_B             0x5000000
+
+#define PBC_INTSTATUS_REG	(PBC_INTSTATUS + PBC_BASE_ADDRESS)
+#define PBC_INTCURR_STATUS_REG	(PBC_INTCURR_STATUS + PBC_BASE_ADDRESS)
+#define PBC_INTMASK_SET_REG	(PBC_INTMASK_SET + PBC_BASE_ADDRESS)
+#define PBC_INTMASK_CLEAR_REG	(PBC_INTMASK_CLEAR + PBC_BASE_ADDRESS)
+#define EXPIO_PARENT_INT	IOMUX_TO_IRQ(MX31_PIN_GPIO1_4)
+
+#define EXPIO_INT_LOW_BAT	(MXC_EXP_IO_BASE + 0)
+#define EXPIO_INT_PB_IRQ	(MXC_EXP_IO_BASE + 1)
+#define EXPIO_INT_OTG_FS_OVR	(MXC_EXP_IO_BASE + 2)
+#define EXPIO_INT_FSH_OVR	(MXC_EXP_IO_BASE + 3)
+#define EXPIO_INT_RES4		(MXC_EXP_IO_BASE + 4)
+#define EXPIO_INT_RES5		(MXC_EXP_IO_BASE + 5)
+#define EXPIO_INT_RES6		(MXC_EXP_IO_BASE + 6)
+#define EXPIO_INT_RES7		(MXC_EXP_IO_BASE + 7)
+#define EXPIO_INT_ENET_INT	(MXC_EXP_IO_BASE + 8)
+#define EXPIO_INT_OTG_FS_INT	(MXC_EXP_IO_BASE + 9)
+#define EXPIO_INT_XUART_INTA	(MXC_EXP_IO_BASE + 10)
+#define EXPIO_INT_XUART_INTB	(MXC_EXP_IO_BASE + 11)
+#define EXPIO_INT_SYNTH_IRQ	(MXC_EXP_IO_BASE + 12)
+#define EXPIO_INT_CE_INT1	(MXC_EXP_IO_BASE + 13)
+#define EXPIO_INT_CE_INT2	(MXC_EXP_IO_BASE + 14)
+#define EXPIO_INT_RES15		(MXC_EXP_IO_BASE + 15)
+
+#define MXC_MAX_EXP_IO_LINES	16
+
+#endif				/* __ASM_ARCH_MXC_BOARD_MX31ADS_H__ */

include/asm-arm/arch-mxc/common.h

···
+/*
+ * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * 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_MXC_COMMON_H__
+#define __ASM_ARCH_MXC_COMMON_H__
+
+struct sys_timer;
+
+extern void mxc_map_io(void);
+extern void mxc_init_irq(void);
+extern struct sys_timer mxc_timer;
+
+#endif

include/asm-arm/arch-mxc/dma.h

···
+/*
+ * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * 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_MXC_DMA_H__
+#define __ASM_ARCH_MXC_DMA_H__
+
+/*!
+ * @file dma.h
+ * @brief This file contains Unified DMA API for all MXC platforms.
+ * The API is platform independent.
+ *
+ * @ingroup SDMA
+ */
+#endif

include/asm-arm/arch-mxc/entry-macro.S

···
+/*
+ *  Copyright (C) 2007 Lennert Buytenhek <[e-mail]>
+ *  Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * 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.
+ */
+
+	@ this macro disables fast irq (not implemented)
+	.macro	disable_fiq
+	.endm
+
+	.macro  get_irqnr_preamble, base, tmp
+	.endm
+
+	.macro  arch_ret_to_user, tmp1, tmp2
+	.endm
+
+	@ this macro checks which interrupt occured
+	@ and returns its number in irqnr
+	@ and returns if an interrupt occured in irqstat
+	.macro	get_irqnr_and_base, irqnr, irqstat, base, tmp
+	ldr	\base, =AVIC_IO_ADDRESS(AVIC_BASE_ADDR)
+	@ Load offset & priority of the highest priority
+	@ interrupt pending from AVIC_NIVECSR
+	ldr	\irqstat, [\base, #0x40]
+	@ Shift to get the decoded IRQ number, using ASR so
+	@ 'no interrupt pending' becomes 0xffffffff
+	mov	\irqnr, \irqstat, asr #16
+	@ set zero flag if IRQ + 1 == 0
+	adds	\tmp, \irqnr, #1
+	.endm
+
+	@ irq priority table (not used)
+	.macro	irq_prio_table
+	.endm

include/asm-arm/arch-mxc/hardware.h

···
+/*
+ *  Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * 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.
+ */
+
+/*!
+ * @file hardware.h
+ * @brief This file contains the hardware definitions of the board.
+ *
+ * @ingroup System
+ */
+#ifndef __ASM_ARCH_MXC_HARDWARE_H__
+#define __ASM_ARCH_MXC_HARDWARE_H__
+
+#include <asm/sizes.h>
+
+#include <asm/arch/mx31.h>
+
+#include <asm/arch/mxc.h>
+
+#define MXC_MAX_GPIO_LINES      (GPIO_NUM_PIN * GPIO_PORT_NUM)
+
+/*
+ * ---------------------------------------------------------------------------
+ * Board specific defines
+ * ---------------------------------------------------------------------------
+ */
+#define MXC_EXP_IO_BASE         (MXC_GPIO_INT_BASE + MXC_MAX_GPIO_LINES)
+
+#include <asm/arch/board-mx31ads.h>
+
+#ifndef MXC_MAX_EXP_IO_LINES
+#define MXC_MAX_EXP_IO_LINES 0
+#endif
+
+#define MXC_MAX_VIRTUAL_INTS	16
+#define MXC_VIRTUAL_INTS_BASE	(MXC_EXP_IO_BASE + MXC_MAX_EXP_IO_LINES)
+#define MXC_SDIO1_CARD_IRQ	MXC_VIRTUAL_INTS_BASE
+#define MXC_SDIO2_CARD_IRQ	(MXC_VIRTUAL_INTS_BASE + 1)
+#define MXC_SDIO3_CARD_IRQ	(MXC_VIRTUAL_INTS_BASE + 2)
+
+#define MXC_MAX_INTS            (MXC_MAX_INT_LINES + \
+                                MXC_MAX_GPIO_LINES + \
+                                MXC_MAX_EXP_IO_LINES + \
+                                MXC_MAX_VIRTUAL_INTS)
+
+#endif				/* __ASM_ARCH_MXC_HARDWARE_H__ */

include/asm-arm/arch-mxc/io.h

···
+/*
+ *  Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * 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.
+ */
+
+/*!
+ * @file io.h
+ * @brief This file contains some memory mapping macros.
+ * @note There is no real ISA or PCI buses. But have to define these macros
+ * for some drivers to compile.
+ *
+ * @ingroup System
+ */
+
+#ifndef __ASM_ARCH_MXC_IO_H__
+#define __ASM_ARCH_MXC_IO_H__
+
+/*! Allow IO space to be anywhere in the memory */
+#define IO_SPACE_LIMIT 0xffffffff
+
+/*!
+ * io address mapping macro
+ */
+#define __io(a)			((void __iomem *)(a))
+
+#define __mem_pci(a)		(a)
+
+#endif

include/asm-arm/arch-mxc/irqs.h

···
+/*
+ *  Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * 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_MXC_IRQS_H__
+#define __ASM_ARCH_MXC_IRQS_H__
+
+#include <asm/hardware.h>
+
+/*!
+ * @file irqs.h
+ * @brief This file defines the number of normal interrupts and fast interrupts
+ *
+ * @ingroup Interrupt
+ */
+
+#define MXC_IRQ_TO_EXPIO(irq)	((irq) - MXC_EXP_IO_BASE)
+
+#define MXC_IRQ_TO_GPIO(irq)	((irq) - MXC_GPIO_INT_BASE)
+#define MXC_GPIO_TO_IRQ(x)	(MXC_GPIO_INT_BASE + x)
+
+/*!
+ * Number of normal interrupts
+ */
+#define NR_IRQS		MXC_MAX_INTS
+
+/*!
+ * Number of fast interrupts
+ */
+#define NR_FIQS		MXC_MAX_INTS
+
+#endif				/* __ASM_ARCH_MXC_IRQS_H__ */

include/asm-arm/arch-mxc/memory.h

···
+/*
+ * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * 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_MXC_MEMORY_H__
+#define __ASM_ARCH_MXC_MEMORY_H__
+
+#include <asm/hardware.h>
+
+/*!
+ * @file memory.h
+ * @brief This file contains macros needed by the Linux kernel and drivers.
+ *
+ * @ingroup Memory
+ */
+
+/*!
+ * Virtual view <-> DMA view memory address translations
+ * This macro is used to translate the virtual address to an address
+ * suitable to be passed to set_dma_addr()
+ */
+#define __virt_to_bus(a)	__virt_to_phys(a)
+
+/*!
+ * Used to convert an address for DMA operations to an address that the
+ * kernel can use.
+ */
+#define __bus_to_virt(a)	__phys_to_virt(a)
+
+#endif				/* __ASM_ARCH_MXC_MEMORY_H__ */

include/asm-arm/arch-mxc/mx31.h

···
+/*
+ * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * 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_MXC_MX31_H__
+#define __ASM_ARCH_MXC_MX31_H__
+
+#ifndef __ASM_ARCH_MXC_HARDWARE_H__
+#error "Do not include directly."
+#endif
+
+/*!
+ * defines the hardware clock tick rate
+ */
+#define CLOCK_TICK_RATE		16625000
+
+/*
+ * MX31 memory map:
+ *
+ * Virt		Phys		Size	What
+ * ---------------------------------------------------------------------------
+ * F8000000	1FFC0000	16K	IRAM
+ * F9000000	30000000	256M	L2CC
+ * FC000000	43F00000	1M	AIPS 1
+ * FC100000	50000000	1M	SPBA
+ * FC200000	53F00000	1M	AIPS 2
+ * FC500000	60000000	128M	ROMPATCH
+ * FC400000	68000000	128M	AVIC
+ *         	70000000	256M	IPU (MAX M2)
+ *         	80000000	256M	CSD0 SDRAM/DDR
+ *         	90000000	256M	CSD1 SDRAM/DDR
+ *         	A0000000	128M	CS0 Flash
+ *         	A8000000	128M	CS1 Flash
+ *         	B0000000	32M	CS2
+ *         	B2000000	32M	CS3
+ * F4000000	B4000000	32M	CS4
+ *         	B6000000	32M	CS5
+ * FC320000	B8000000	64K	NAND, SDRAM, WEIM, M3IF, EMI controllers
+ *         	C0000000	64M	PCMCIA/CF
+ */
+
+#define CS0_BASE_ADDR		0xA0000000
+#define CS1_BASE_ADDR		0xA8000000
+#define CS2_BASE_ADDR		0xB0000000
+#define CS3_BASE_ADDR		0xB2000000
+
+#define CS4_BASE_ADDR		0xB4000000
+#define CS4_BASE_ADDR_VIRT	0xF4000000
+#define CS4_SIZE		SZ_32M
+
+#define CS5_BASE_ADDR		0xB6000000
+#define PCMCIA_MEM_BASE_ADDR	0xBC000000
+
+/*
+ * IRAM
+ */
+#define IRAM_BASE_ADDR		0x1FFC0000	/* internal ram */
+#define IRAM_BASE_ADDR_VIRT	0xF8000000
+#define IRAM_SIZE		SZ_16K
+
+/*
+ * L2CC
+ */
+#define L2CC_BASE_ADDR		0x30000000
+#define L2CC_BASE_ADDR_VIRT	0xF9000000
+#define L2CC_SIZE		SZ_1M
+
+/*
+ * AIPS 1
+ */
+#define AIPS1_BASE_ADDR		0x43F00000
+#define AIPS1_BASE_ADDR_VIRT	0xFC000000
+#define AIPS1_SIZE		SZ_1M
+
+#define MAX_BASE_ADDR		(AIPS1_BASE_ADDR + 0x00004000)
+#define EVTMON_BASE_ADDR	(AIPS1_BASE_ADDR + 0x00008000)
+#define CLKCTL_BASE_ADDR	(AIPS1_BASE_ADDR + 0x0000C000)
+#define ETB_SLOT4_BASE_ADDR	(AIPS1_BASE_ADDR + 0x00010000)
+#define ETB_SLOT5_BASE_ADDR	(AIPS1_BASE_ADDR + 0x00014000)
+#define ECT_CTIO_BASE_ADDR	(AIPS1_BASE_ADDR + 0x00018000)
+#define I2C_BASE_ADDR		(AIPS1_BASE_ADDR + 0x00080000)
+#define I2C3_BASE_ADDR		(AIPS1_BASE_ADDR + 0x00084000)
+#define OTG_BASE_ADDR		(AIPS1_BASE_ADDR + 0x00088000)
+#define ATA_BASE_ADDR		(AIPS1_BASE_ADDR + 0x0008C000)
+#define UART1_BASE_ADDR 	(AIPS1_BASE_ADDR + 0x00090000)
+#define UART2_BASE_ADDR 	(AIPS1_BASE_ADDR + 0x00094000)
+#define I2C2_BASE_ADDR		(AIPS1_BASE_ADDR + 0x00098000)
+#define OWIRE_BASE_ADDR 	(AIPS1_BASE_ADDR + 0x0009C000)
+#define SSI1_BASE_ADDR		(AIPS1_BASE_ADDR + 0x000A0000)
+#define CSPI1_BASE_ADDR 	(AIPS1_BASE_ADDR + 0x000A4000)
+#define KPP_BASE_ADDR		(AIPS1_BASE_ADDR + 0x000A8000)
+#define IOMUXC_BASE_ADDR	(AIPS1_BASE_ADDR + 0x000AC000)
+#define UART4_BASE_ADDR 	(AIPS1_BASE_ADDR + 0x000B0000)
+#define UART5_BASE_ADDR 	(AIPS1_BASE_ADDR + 0x000B4000)
+#define ECT_IP1_BASE_ADDR	(AIPS1_BASE_ADDR + 0x000B8000)
+#define ECT_IP2_BASE_ADDR	(AIPS1_BASE_ADDR + 0x000BC000)
+
+/*
+ * SPBA global module enabled #0
+ */
+#define SPBA0_BASE_ADDR 	0x50000000
+#define SPBA0_BASE_ADDR_VIRT	0xFC100000
+#define SPBA0_SIZE		SZ_1M
+
+#define MMC_SDHC1_BASE_ADDR	(SPBA0_BASE_ADDR + 0x00004000)
+#define MMC_SDHC2_BASE_ADDR	(SPBA0_BASE_ADDR + 0x00008000)
+#define UART3_BASE_ADDR 	(SPBA0_BASE_ADDR + 0x0000C000)
+#define CSPI2_BASE_ADDR 	(SPBA0_BASE_ADDR + 0x00010000)
+#define SSI2_BASE_ADDR		(SPBA0_BASE_ADDR + 0x00014000)
+#define SIM1_BASE_ADDR		(SPBA0_BASE_ADDR + 0x00018000)
+#define IIM_BASE_ADDR		(SPBA0_BASE_ADDR + 0x0001C000)
+#define ATA_DMA_BASE_ADDR	(SPBA0_BASE_ADDR + 0x00020000)
+#define MSHC1_BASE_ADDR		(SPBA0_BASE_ADDR + 0x00024000)
+#define MSHC2_BASE_ADDR		(SPBA0_BASE_ADDR + 0x00024000)
+#define SPBA_CTRL_BASE_ADDR	(SPBA0_BASE_ADDR + 0x0003C000)
+
+/*
+ * AIPS 2
+ */
+#define AIPS2_BASE_ADDR		0x53F00000
+#define AIPS2_BASE_ADDR_VIRT	0xFC200000
+#define AIPS2_SIZE		SZ_1M
+#define CCM_BASE_ADDR		(AIPS2_BASE_ADDR + 0x00080000)
+#define CSPI3_BASE_ADDR		(AIPS2_BASE_ADDR + 0x00084000)
+#define FIRI_BASE_ADDR		(AIPS2_BASE_ADDR + 0x0008C000)
+#define GPT1_BASE_ADDR		(AIPS2_BASE_ADDR + 0x00090000)
+#define EPIT1_BASE_ADDR		(AIPS2_BASE_ADDR + 0x00094000)
+#define EPIT2_BASE_ADDR		(AIPS2_BASE_ADDR + 0x00098000)
+#define GPIO3_BASE_ADDR		(AIPS2_BASE_ADDR + 0x000A4000)
+#define SCC_BASE_ADDR		(AIPS2_BASE_ADDR + 0x000AC000)
+#define SCM_BASE_ADDR		(AIPS2_BASE_ADDR + 0x000AE000)
+#define SMN_BASE_ADDR		(AIPS2_BASE_ADDR + 0x000AF000)
+#define RNGA_BASE_ADDR		(AIPS2_BASE_ADDR + 0x000B0000)
+#define IPU_CTRL_BASE_ADDR	(AIPS2_BASE_ADDR + 0x000C0000)
+#define AUDMUX_BASE_ADDR	(AIPS2_BASE_ADDR + 0x000C4000)
+#define MPEG4_ENC_BASE_ADDR	(AIPS2_BASE_ADDR + 0x000C8000)
+#define GPIO1_BASE_ADDR		(AIPS2_BASE_ADDR + 0x000CC000)
+#define GPIO2_BASE_ADDR		(AIPS2_BASE_ADDR + 0x000D0000)
+#define SDMA_BASE_ADDR		(AIPS2_BASE_ADDR + 0x000D4000)
+#define RTC_BASE_ADDR		(AIPS2_BASE_ADDR + 0x000D8000)
+#define WDOG_BASE_ADDR		(AIPS2_BASE_ADDR + 0x000DC000)
+#define PWM_BASE_ADDR		(AIPS2_BASE_ADDR + 0x000E0000)
+#define RTIC_BASE_ADDR		(AIPS2_BASE_ADDR + 0x000EC000)
+
+/*
+ * ROMP and AVIC
+ */
+#define ROMP_BASE_ADDR		0x60000000
+#define ROMP_BASE_ADDR_VIRT	0xFC500000
+#define ROMP_SIZE		SZ_1M
+
+#define AVIC_BASE_ADDR		0x68000000
+#define AVIC_BASE_ADDR_VIRT	0xFC400000
+#define AVIC_SIZE		SZ_1M
+
+/*
+ * NAND, SDRAM, WEIM, M3IF, EMI controllers
+ */
+#define X_MEMC_BASE_ADDR	0xB8000000
+#define X_MEMC_BASE_ADDR_VIRT	0xFC320000
+#define X_MEMC_SIZE		SZ_64K
+
+#define NFC_BASE_ADDR		(X_MEMC_BASE_ADDR + 0x0000)
+#define ESDCTL_BASE_ADDR	(X_MEMC_BASE_ADDR + 0x1000)
+#define WEIM_BASE_ADDR		(X_MEMC_BASE_ADDR + 0x2000)
+#define M3IF_BASE_ADDR		(X_MEMC_BASE_ADDR + 0x3000)
+#define EMI_CTL_BASE_ADDR	(X_MEMC_BASE_ADDR + 0x4000)
+#define PCMCIA_CTL_BASE_ADDR	EMI_CTL_BASE_ADDR
+
+/*
+ * Memory regions and CS
+ */
+#define IPU_MEM_BASE_ADDR	0x70000000
+#define CSD0_BASE_ADDR		0x80000000
+#define CSD1_BASE_ADDR		0x90000000
+#define CS0_BASE_ADDR		0xA0000000
+#define CS1_BASE_ADDR		0xA8000000
+#define CS2_BASE_ADDR		0xB0000000
+#define CS3_BASE_ADDR		0xB2000000
+
+#define CS4_BASE_ADDR		0xB4000000
+#define CS4_BASE_ADDR_VIRT	0xF4000000
+#define CS4_SIZE		SZ_32M
+
+#define CS5_BASE_ADDR		0xB6000000
+#define PCMCIA_MEM_BASE_ADDR	0xBC000000
+
+/*!
+ * This macro defines the physical to virtual address mapping for all the
+ * peripheral modules. It is used by passing in the physical address as x
+ * and returning the virtual address. If the physical address is not mapped,
+ * it returns 0xDEADBEEF
+ */
+#define IO_ADDRESS(x)   \
+	(((x >= IRAM_BASE_ADDR) && (x < (IRAM_BASE_ADDR + IRAM_SIZE))) ? IRAM_IO_ADDRESS(x):\
+	((x >= L2CC_BASE_ADDR) && (x < (L2CC_BASE_ADDR + L2CC_SIZE))) ? L2CC_IO_ADDRESS(x):\
+	((x >= AIPS1_BASE_ADDR) && (x < (AIPS1_BASE_ADDR + AIPS1_SIZE))) ? AIPS1_IO_ADDRESS(x):\
+	((x >= SPBA0_BASE_ADDR) && (x < (SPBA0_BASE_ADDR + SPBA0_SIZE))) ? SPBA0_IO_ADDRESS(x):\
+	((x >= AIPS2_BASE_ADDR) && (x < (AIPS2_BASE_ADDR + AIPS2_SIZE))) ? AIPS2_IO_ADDRESS(x):\
+	((x >= ROMP_BASE_ADDR) && (x < (ROMP_BASE_ADDR + ROMP_SIZE))) ? ROMP_IO_ADDRESS(x):\
+	((x >= AVIC_BASE_ADDR) && (x < (AVIC_BASE_ADDR + AVIC_SIZE))) ? AVIC_IO_ADDRESS(x):\
+	((x >= CS4_BASE_ADDR) && (x < (CS4_BASE_ADDR + CS4_SIZE))) ? CS4_IO_ADDRESS(x):\
+	((x >= X_MEMC_BASE_ADDR) && (x < (X_MEMC_BASE_ADDR + X_MEMC_SIZE))) ? X_MEMC_IO_ADDRESS(x):\
+	0xDEADBEEF)
+
+/*
+ * define the address mapping macros: in physical address order
+ */
+
+#define IRAM_IO_ADDRESS(x)  \
+	(((x) - IRAM_BASE_ADDR) + IRAM_BASE_ADDR_VIRT)
+
+#define L2CC_IO_ADDRESS(x)  \
+	(((x) - L2CC_BASE_ADDR) + L2CC_BASE_ADDR_VIRT)
+
+#define AIPS1_IO_ADDRESS(x)  \
+	(((x) - AIPS1_BASE_ADDR) + AIPS1_BASE_ADDR_VIRT)
+
+#define SPBA0_IO_ADDRESS(x)  \
+	(((x) - SPBA0_BASE_ADDR) + SPBA0_BASE_ADDR_VIRT)
+
+#define AIPS2_IO_ADDRESS(x)  \
+	(((x) - AIPS2_BASE_ADDR) + AIPS2_BASE_ADDR_VIRT)
+
+#define ROMP_IO_ADDRESS(x)  \
+	(((x) - ROMP_BASE_ADDR) + ROMP_BASE_ADDR_VIRT)
+
+#define AVIC_IO_ADDRESS(x)  \
+	(((x) - AVIC_BASE_ADDR) + AVIC_BASE_ADDR_VIRT)
+
+#define CS4_IO_ADDRESS(x)  \
+	(((x) - CS4_BASE_ADDR) + CS4_BASE_ADDR_VIRT)
+
+#define X_MEMC_IO_ADDRESS(x)  \
+	(((x) - X_MEMC_BASE_ADDR) + X_MEMC_BASE_ADDR_VIRT)
+
+#define PCMCIA_IO_ADDRESS(x) \
+	(((x) - X_MEMC_BASE_ADDR) + X_MEMC_BASE_ADDR_VIRT)
+
+/* Start of physical RAM - On many MX31 platforms, this is the first SDRAM bank (CSD0) */
+#define PHYS_OFFSET             CSD0_BASE_ADDR
+
+/*
+ * Interrupt numbers
+ */
+#define MXC_INT_PEN_ADS7843	0
+#define MXC_INT_RESV1		1
+#define MXC_INT_CS8900A		2
+#define MXC_INT_I2C3		3
+#define MXC_INT_I2C2		4
+#define MXC_INT_MPEG4_ENCODER	5
+#define MXC_INT_RTIC		6
+#define MXC_INT_FIRI		7
+#define MXC_INT_MMC_SDHC2	8
+#define MXC_INT_MMC_SDHC1	9
+#define MXC_INT_I2C		10
+#define MXC_INT_SSI2		11
+#define MXC_INT_SSI1		12
+#define MXC_INT_CSPI2		13
+#define MXC_INT_CSPI1		14
+#define MXC_INT_ATA		15
+#define MXC_INT_MBX		16
+#define MXC_INT_CSPI3		17
+#define MXC_INT_UART3		18
+#define MXC_INT_IIM		19
+#define MXC_INT_SIM2		20
+#define MXC_INT_SIM1		21
+#define MXC_INT_RNGA		22
+#define MXC_INT_EVTMON		23
+#define MXC_INT_KPP		24
+#define MXC_INT_RTC		25
+#define MXC_INT_PWM		26
+#define MXC_INT_EPIT2		27
+#define MXC_INT_EPIT1		28
+#define MXC_INT_GPT		29
+#define MXC_INT_RESV30		30
+#define MXC_INT_RESV31		31
+#define MXC_INT_UART2		32
+#define MXC_INT_NANDFC		33
+#define MXC_INT_SDMA		34
+#define MXC_INT_USB1		35
+#define MXC_INT_USB2		36
+#define MXC_INT_USB3		37
+#define MXC_INT_USB4		38
+#define MXC_INT_MSHC1		39
+#define MXC_INT_MSHC2		40
+#define MXC_INT_IPU_ERR		41
+#define MXC_INT_IPU_SYN		42
+#define MXC_INT_RESV43		43
+#define MXC_INT_RESV44		44
+#define MXC_INT_UART1		45
+#define MXC_INT_UART4		46
+#define MXC_INT_UART5		47
+#define MXC_INT_ECT		48
+#define MXC_INT_SCC_SCM		49
+#define MXC_INT_SCC_SMN		50
+#define MXC_INT_GPIO2		51
+#define MXC_INT_GPIO1		52
+#define MXC_INT_CCM		53
+#define MXC_INT_PCMCIA		54
+#define MXC_INT_WDOG		55
+#define MXC_INT_GPIO3		56
+#define MXC_INT_RESV57		57
+#define MXC_INT_EXT_POWER	58
+#define MXC_INT_EXT_TEMPER	59
+#define MXC_INT_EXT_SENSOR60	60
+#define MXC_INT_EXT_SENSOR61	61
+#define MXC_INT_EXT_WDOG	62
+#define MXC_INT_EXT_TV		63
+
+#define MXC_MAX_INT_LINES	64
+
+#define MXC_GPIO_INT_BASE	MXC_MAX_INT_LINES
+
+/*!
+ * Number of GPIO port as defined in the IC Spec
+ */
+#define GPIO_PORT_NUM		3
+/*!
+ * Number of GPIO pins per port
+ */
+#define GPIO_NUM_PIN		32
+
+#define PROD_SIGNATURE		0x1	/* For MX31 */
+
+#define SYSTEM_REV_MIN		CHIP_REV_1_0
+#define SYSTEM_REV_NUM		3
+
+#endif			/*  __ASM_ARCH_MXC_MX31_H__ */

include/asm-arm/arch-mxc/mxc.h

···
+/*
+ * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * 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_MXC_H__
+#define __ASM_ARCH_MXC_H__
+
+#ifndef __ASM_ARCH_MXC_HARDWARE_H__
+#error "Do not include directly."
+#endif
+
+/*
+ *****************************************
+ * GPT  Register definitions             *
+ *****************************************
+ */
+#define MXC_GPT_GPTCR		IO_ADDRESS(GPT1_BASE_ADDR + 0x00)
+#define MXC_GPT_GPTPR		IO_ADDRESS(GPT1_BASE_ADDR + 0x04)
+#define MXC_GPT_GPTSR		IO_ADDRESS(GPT1_BASE_ADDR + 0x08)
+#define MXC_GPT_GPTIR		IO_ADDRESS(GPT1_BASE_ADDR + 0x0C)
+#define MXC_GPT_GPTOCR1		IO_ADDRESS(GPT1_BASE_ADDR + 0x10)
+#define MXC_GPT_GPTOCR2		IO_ADDRESS(GPT1_BASE_ADDR + 0x14)
+#define MXC_GPT_GPTOCR3		IO_ADDRESS(GPT1_BASE_ADDR + 0x18)
+#define MXC_GPT_GPTICR1		IO_ADDRESS(GPT1_BASE_ADDR + 0x1C)
+#define MXC_GPT_GPTICR2		IO_ADDRESS(GPT1_BASE_ADDR + 0x20)
+#define MXC_GPT_GPTCNT		IO_ADDRESS(GPT1_BASE_ADDR + 0x24)
+
+/*!
+ * GPT Control register bit definitions
+ */
+#define GPTCR_FO3			(1 << 31)
+#define GPTCR_FO2			(1 << 30)
+#define GPTCR_FO1			(1 << 29)
+
+#define GPTCR_OM3_SHIFT			26
+#define GPTCR_OM3_MASK			(7 << GPTCR_OM3_SHIFT)
+#define GPTCR_OM3_DISCONNECTED		(0 << GPTCR_OM3_SHIFT)
+#define GPTCR_OM3_TOGGLE		(1 << GPTCR_OM3_SHIFT)
+#define GPTCR_OM3_CLEAR			(2 << GPTCR_OM3_SHIFT)
+#define GPTCR_OM3_SET			(3 << GPTCR_OM3_SHIFT)
+#define GPTCR_OM3_GENERATE_LOW		(7 << GPTCR_OM3_SHIFT)
+
+#define GPTCR_OM2_SHIFT			23
+#define GPTCR_OM2_MASK			(7 << GPTCR_OM2_SHIFT)
+#define GPTCR_OM2_DISCONNECTED		(0 << GPTCR_OM2_SHIFT)
+#define GPTCR_OM2_TOGGLE		(1 << GPTCR_OM2_SHIFT)
+#define GPTCR_OM2_CLEAR			(2 << GPTCR_OM2_SHIFT)
+#define GPTCR_OM2_SET			(3 << GPTCR_OM2_SHIFT)
+#define GPTCR_OM2_GENERATE_LOW		(7 << GPTCR_OM2_SHIFT)
+
+#define GPTCR_OM1_SHIFT			20
+#define GPTCR_OM1_MASK			(7 << GPTCR_OM1_SHIFT)
+#define GPTCR_OM1_DISCONNECTED		(0 << GPTCR_OM1_SHIFT)
+#define GPTCR_OM1_TOGGLE		(1 << GPTCR_OM1_SHIFT)
+#define GPTCR_OM1_CLEAR			(2 << GPTCR_OM1_SHIFT)
+#define GPTCR_OM1_SET			(3 << GPTCR_OM1_SHIFT)
+#define GPTCR_OM1_GENERATE_LOW		(7 << GPTCR_OM1_SHIFT)
+
+#define GPTCR_IM2_SHIFT			18
+#define GPTCR_IM2_MASK			(3 << GPTCR_IM2_SHIFT)
+#define GPTCR_IM2_CAPTURE_DISABLE	(0 << GPTCR_IM2_SHIFT)
+#define GPTCR_IM2_CAPTURE_RISING	(1 << GPTCR_IM2_SHIFT)
+#define GPTCR_IM2_CAPTURE_FALLING	(2 << GPTCR_IM2_SHIFT)
+#define GPTCR_IM2_CAPTURE_BOTH		(3 << GPTCR_IM2_SHIFT)
+
+#define GPTCR_IM1_SHIFT			16
+#define GPTCR_IM1_MASK			(3 << GPTCR_IM1_SHIFT)
+#define GPTCR_IM1_CAPTURE_DISABLE	(0 << GPTCR_IM1_SHIFT)
+#define GPTCR_IM1_CAPTURE_RISING	(1 << GPTCR_IM1_SHIFT)
+#define GPTCR_IM1_CAPTURE_FALLING	(2 << GPTCR_IM1_SHIFT)
+#define GPTCR_IM1_CAPTURE_BOTH		(3 << GPTCR_IM1_SHIFT)
+
+#define GPTCR_SWR			(1 << 15)
+#define GPTCR_FRR			(1 << 9)
+
+#define GPTCR_CLKSRC_SHIFT		6
+#define GPTCR_CLKSRC_MASK		(7 << GPTCR_CLKSRC_SHIFT)
+#define GPTCR_CLKSRC_NOCLOCK		(0 << GPTCR_CLKSRC_SHIFT)
+#define GPTCR_CLKSRC_HIGHFREQ		(2 << GPTCR_CLKSRC_SHIFT)
+#define GPTCR_CLKSRC_CLKIN		(3 << GPTCR_CLKSRC_SHIFT)
+#define GPTCR_CLKSRC_CLK32K		(7 << GPTCR_CLKSRC_SHIFT)
+
+#define GPTCR_STOPEN			(1 << 5)
+#define GPTCR_DOZEN			(1 << 4)
+#define GPTCR_WAITEN			(1 << 3)
+#define GPTCR_DBGEN			(1 << 2)
+
+#define GPTCR_ENMOD			(1 << 1)
+#define GPTCR_ENABLE			(1 << 0)
+
+#define GPTSR_OF1			(1 << 0)
+#define GPTSR_OF2			(1 << 1)
+#define GPTSR_OF3			(1 << 2)
+#define GPTSR_IF1			(1 << 3)
+#define GPTSR_IF2			(1 << 4)
+#define GPTSR_ROV			(1 << 5)
+
+#define GPTIR_OF1IE			GPTSR_OF1
+#define GPTIR_OF2IE			GPTSR_OF2
+#define GPTIR_OF3IE			GPTSR_OF3
+#define GPTIR_IF1IE			GPTSR_IF1
+#define GPTIR_IF2IE			GPTSR_IF2
+#define GPTIR_ROVIE			GPTSR_ROV
+
+/*
+ *****************************************
+ * AVIC Registers                        *
+ *****************************************
+ */
+#define AVIC_BASE		IO_ADDRESS(AVIC_BASE_ADDR)
+#define AVIC_INTCNTL		(AVIC_BASE + 0x00)	/* int control reg */
+#define AVIC_NIMASK		(AVIC_BASE + 0x04)	/* int mask reg */
+#define AVIC_INTENNUM		(AVIC_BASE + 0x08)	/* int enable number reg */
+#define AVIC_INTDISNUM		(AVIC_BASE + 0x0C)	/* int disable number reg */
+#define AVIC_INTENABLEH		(AVIC_BASE + 0x10)	/* int enable reg high */
+#define AVIC_INTENABLEL		(AVIC_BASE + 0x14)	/* int enable reg low */
+#define AVIC_INTTYPEH		(AVIC_BASE + 0x18)	/* int type reg high */
+#define AVIC_INTTYPEL		(AVIC_BASE + 0x1C)	/* int type reg low */
+#define AVIC_NIPRIORITY7	(AVIC_BASE + 0x20)	/* norm int priority lvl7 */
+#define AVIC_NIPRIORITY6	(AVIC_BASE + 0x24)	/* norm int priority lvl6 */
+#define AVIC_NIPRIORITY5	(AVIC_BASE + 0x28)	/* norm int priority lvl5 */
+#define AVIC_NIPRIORITY4	(AVIC_BASE + 0x2C)	/* norm int priority lvl4 */
+#define AVIC_NIPRIORITY3	(AVIC_BASE + 0x30)	/* norm int priority lvl3 */
+#define AVIC_NIPRIORITY2	(AVIC_BASE + 0x34)	/* norm int priority lvl2 */
+#define AVIC_NIPRIORITY1	(AVIC_BASE + 0x38)	/* norm int priority lvl1 */
+#define AVIC_NIPRIORITY0	(AVIC_BASE + 0x3C)	/* norm int priority lvl0 */
+#define AVIC_NIVECSR		(AVIC_BASE + 0x40)	/* norm int vector/status */
+#define AVIC_FIVECSR		(AVIC_BASE + 0x44)	/* fast int vector/status */
+#define AVIC_INTSRCH		(AVIC_BASE + 0x48)	/* int source reg high */
+#define AVIC_INTSRCL		(AVIC_BASE + 0x4C)	/* int source reg low */
+#define AVIC_INTFRCH		(AVIC_BASE + 0x50)	/* int force reg high */
+#define AVIC_INTFRCL		(AVIC_BASE + 0x54)	/* int force reg low */
+#define AVIC_NIPNDH		(AVIC_BASE + 0x58)	/* norm int pending high */
+#define AVIC_NIPNDL		(AVIC_BASE + 0x5C)	/* norm int pending low */
+#define AVIC_FIPNDH		(AVIC_BASE + 0x60)	/* fast int pending high */
+#define AVIC_FIPNDL		(AVIC_BASE + 0x64)	/* fast int pending low */
+
+#define SYSTEM_PREV_REG		IO_ADDRESS(IIM_BASE_ADDR + 0x20)
+#define SYSTEM_SREV_REG		IO_ADDRESS(IIM_BASE_ADDR + 0x24)
+#define IIM_PROD_REV_SH		3
+#define IIM_PROD_REV_LEN	5
+
+#endif				/*  __ASM_ARCH_MXC_H__ */

include/asm-arm/arch-mxc/system.h

···
+/*
+ *  Copyright (C) 1999 ARM Limited
+ *  Copyright (C) 2000 Deep Blue Solutions Ltd
+ *  Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef __ASM_ARCH_MXC_SYSTEM_H__
+#define __ASM_ARCH_MXC_SYSTEM_H__
+
+/*!
+ * @file system.h
+ * @brief This file contains idle and reset functions.
+ *
+ * @ingroup System
+ */
+
+/*!
+ * This function puts the CPU into idle mode. It is called by default_idle()
+ * in process.c file.
+ */
+static inline void arch_idle(void)
+{
+	cpu_do_idle();
+}
+
+/*
+ * This function resets the system. It is called by machine_restart().
+ *
+ * @param  mode         indicates different kinds of resets
+ */
+static inline void arch_reset(char mode)
+{
+	cpu_reset(0);
+}
+
+#endif				/* __ASM_ARCH_MXC_SYSTEM_H__ */

include/asm-arm/arch-mxc/timex.h

···
+/*
+ *  Copyright (C) 1999 ARM Limited
+ * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef __ASM_ARCH_MXC_TIMEX_H__
+#define __ASM_ARCH_MXC_TIMEX_H__
+
+#include <asm/hardware.h>	/* for CLOCK_TICK_RATE */
+
+#endif				/* __ASM_ARCH_MXC_TIMEX_H__ */

include/asm-arm/arch-mxc/uncompress.h

···
+/*
+ *  include/asm-arm/arch-mxc/uncompress.h
+ *
+ *
+ *
+ *  Copyright (C) 1999 ARM Limited
+ *  Copyright (C) Shane Nay ([e-mail])
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#ifndef __ASM_ARCH_MXC_UNCOMPRESS_H__
+#define __ASM_ARCH_MXC_UNCOMPRESS_H__
+
+#define __MXC_BOOT_UNCOMPRESS
+
+#include <asm/hardware.h>
+#include <asm/processor.h>
+
+#define UART(x) (*(volatile unsigned long *)(serial_port + (x)))
+
+#define USR2 0x98
+#define USR2_TXFE (1<<14)
+#define TXR  0x40
+#define UCR1 0x80
+#define UCR1_UARTEN 1
+
+/*
+ * The following code assumes the serial port has already been
+ * initialized by the bootloader.  We search for the first enabled
+ * port in the most probable order.  If you didn't setup a port in
+ * your bootloader then nothing will appear (which might be desired).
+ *
+ * This does not append a newline
+ */
+
+static void putc(int ch)
+{
+	static unsigned long serial_port = 0;
+
+	if (unlikely(serial_port == 0)) {
+		do {
+			serial_port = UART1_BASE_ADDR;
+			if (UART(UCR1) & UCR1_UARTEN)
+				break;
+			serial_port = UART2_BASE_ADDR;
+			if (UART(UCR1) & UCR1_UARTEN)
+				break;
+			return;
+		} while (0);
+	}
+
+	while (!(UART(USR2) & USR2_TXFE))
+		cpu_relax();
+
+	UART(TXR) = ch;
+}
+
+#define flush() do { } while (0)
+
+/*
+ * nothing to do
+ */
+#define arch_decomp_setup()
+
+#define arch_decomp_wdog()
+
+#endif				/* __ASM_ARCH_MXC_UNCOMPRESS_H__ */

include/asm-arm/arch-mxc/vmalloc.h

···
+/*
+ *  Copyright (C) 2000 Russell King.
+ *  Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef __ASM_ARCH_MXC_VMALLOC_H__
+#define __ASM_ARCH_MXC_VMALLOC_H__
+
+/*!
+ * @file vmalloc.h
+ *
+ * @brief This file contains platform specific macros for vmalloc.
+ *
+ * @ingroup System
+ */
+
+/*!
+ * vmalloc ending address
+ */
+#define VMALLOC_END       0xF4000000
+
+#endif				/* __ASM_ARCH_MXC_VMALLOC_H__ */