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core.c

/*
 *  linux/arch/arm/mm/mm-lusl7200.c
 *
 *  Copyright (C) 2000 Steve Hill (sjhill@cotw.com)
 *
 *  Extra MM routines for L7200 architecture
 */
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/device.h>

#include <asm/types.h>
#include <asm/irq.h>
#include <asm/mach-types.h>
#include <asm/hardware.h>
#include <asm/page.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>

/*
 * IRQ base register
 */
#define     IRQ_BASE    (IO_BASE_2 + 0x1000)

/* 
 * Normal IRQ registers
 */
#define IRQ_STATUS      (*(volatile unsigned long *) (IRQ_BASE + 0x000))
#define IRQ_RAWSTATUS   (*(volatile unsigned long *) (IRQ_BASE + 0x004))
#define IRQ_ENABLE      (*(volatile unsigned long *) (IRQ_BASE + 0x008))
#define IRQ_ENABLECLEAR (*(volatile unsigned long *) (IRQ_BASE + 0x00c))
#define IRQ_SOFT  (*(volatile unsigned long *) (IRQ_BASE + 0x010))
#define IRQ_SOURCESEL   (*(volatile unsigned long *) (IRQ_BASE + 0x018))

/* 
 * Fast IRQ registers
 */
#define FIQ_STATUS      (*(volatile unsigned long *) (IRQ_BASE + 0x100))
#define FIQ_RAWSTATUS   (*(volatile unsigned long *) (IRQ_BASE + 0x104))
#define FIQ_ENABLE      (*(volatile unsigned long *) (IRQ_BASE + 0x108))
#define FIQ_ENABLECLEAR (*(volatile unsigned long *) (IRQ_BASE + 0x10c))
#define FIQ_SOFT  (*(volatile unsigned long *) (IRQ_BASE + 0x110))
#define FIQ_SOURCESEL   (*(volatile unsigned long *) (IRQ_BASE + 0x118))

static void l7200_mask_irq(unsigned int irq)
{
      IRQ_ENABLECLEAR = 1 << irq;
}

static void l7200_unmask_irq(unsigned int irq)
{
      IRQ_ENABLE = 1 << irq;
}

static struct irq_chip l7200_irq_chip = {
      .ack        = l7200_mask_irq,
      .mask       = l7200_mask_irq,
      .unmask           = l7200_unmask_irq
};
 
static void __init l7200_init_irq(void)
{
      int irq;

      IRQ_ENABLECLEAR = 0xffffffff; /* clear all interrupt enables */
      FIQ_ENABLECLEAR = 0xffffffff; /* clear all fast interrupt enables */

      for (irq = 0; irq < NR_IRQS; irq++) {
            set_irq_chip(irq, &l7200_irq_chip);
            set_irq_flags(irq, IRQF_VALID);
            set_irq_handler(irq, handle_level_irq);
      }

      init_FIQ();
}

static struct map_desc l7200_io_desc[] __initdata = {
      { IO_BASE,  IO_START,   IO_SIZE,    MT_DEVICE },
      { IO_BASE_2,      IO_START_2, IO_SIZE_2,  MT_DEVICE },
      { AUX_BASE,     AUX_START,      AUX_SIZE,       MT_DEVICE },
      { FLASH1_BASE,  FLASH1_START,   FLASH1_SIZE,    MT_DEVICE },
      { FLASH2_BASE,  FLASH2_START,   FLASH2_SIZE,    MT_DEVICE }
};

static void __init l7200_map_io(void)
{
      iotable_init(l7200_io_desc, ARRAY_SIZE(l7200_io_desc));
}

MACHINE_START(L7200, "LinkUp Systems L7200")
      /* Maintainer: Steve Hill / Scott McConnell */
      .phys_io    = 0x80040000,
      .io_pg_offst      = ((0xd0000000) >> 18) & 0xfffc,
      .map_io           = l7200_map_io,
      .init_irq   = l7200_init_irq,
MACHINE_END


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