LXR linux/arch/arm/mach-l7200/core.c

   1/*
   2 *  linux/arch/arm/mm/mm-lusl7200.c
   3 *
   4 *  Copyright (C) 2000 Steve Hill (sjhill@cotw.com)
   5 *
   6 *  Extra MM routines for L7200 architecture
   7 */
   8#include <linux/kernel.h>
   9#include <linux/init.h>
  10#include <linux/irq.h>
  11#include <linux/device.h>
  12
  13#include <asm/types.h>
  14#include <asm/irq.h>
  15#include <asm/mach-types.h>
  16#include <mach/hardware.h>
  17#include <asm/page.h>
  18
  19#include <asm/mach/arch.h>
  20#include <asm/mach/map.h>
  21#include <asm/mach/irq.h>
  22
  23/*
  24 * IRQ base register
  25 */
  26#define IRQ_BASE        (IO_BASE_2 + 0x1000)
  27
  28/* 
  29 * Normal IRQ registers
  30 */
  31#define IRQ_STATUS      (*(volatile unsigned long *) (IRQ_BASE + 0x000))
  32#define IRQ_RAWSTATUS   (*(volatile unsigned long *) (IRQ_BASE + 0x004))
  33#define IRQ_ENABLE      (*(volatile unsigned long *) (IRQ_BASE + 0x008))
  34#define IRQ_ENABLECLEAR (*(volatile unsigned long *) (IRQ_BASE + 0x00c))
  35#define IRQ_SOFT        (*(volatile unsigned long *) (IRQ_BASE + 0x010))
  36#define IRQ_SOURCESEL   (*(volatile unsigned long *) (IRQ_BASE + 0x018))
  37
  38/* 
  39 * Fast IRQ registers
  40 */
  41#define FIQ_STATUS      (*(volatile unsigned long *) (IRQ_BASE + 0x100))
  42#define FIQ_RAWSTATUS   (*(volatile unsigned long *) (IRQ_BASE + 0x104))
  43#define FIQ_ENABLE      (*(volatile unsigned long *) (IRQ_BASE + 0x108))
  44#define FIQ_ENABLECLEAR (*(volatile unsigned long *) (IRQ_BASE + 0x10c))
  45#define FIQ_SOFT        (*(volatile unsigned long *) (IRQ_BASE + 0x110))
  46#define FIQ_SOURCESEL   (*(volatile unsigned long *) (IRQ_BASE + 0x118))
  47
  48static void l7200_mask_irq(unsigned int irq)
  49{
  50        IRQ_ENABLECLEAR = 1 << irq;
  51}
  52
  53static void l7200_unmask_irq(unsigned int irq)
  54{
  55        IRQ_ENABLE = 1 << irq;
  56}
  57
  58static struct irq_chip l7200_irq_chip = {
  59        .ack            = l7200_mask_irq,
  60        .mask           = l7200_mask_irq,
  61        .unmask         = l7200_unmask_irq
  62};
  63 
  64static void __init l7200_init_irq(void)
  65{
  66        int irq;
  67
  68        IRQ_ENABLECLEAR = 0xffffffff;   /* clear all interrupt enables */
  69        FIQ_ENABLECLEAR = 0xffffffff;   /* clear all fast interrupt enables */
  70
  71        for (irq = 0; irq < NR_IRQS; irq++) {
  72                set_irq_chip(irq, &l7200_irq_chip);
  73                set_irq_flags(irq, IRQF_VALID);
  74                set_irq_handler(irq, handle_level_irq);
  75        }
  76
  77        init_FIQ();
  78}
  79
  80static struct map_desc l7200_io_desc[] __initdata = {
  81        { IO_BASE,      IO_START,       IO_SIZE,        MT_DEVICE },
  82        { IO_BASE_2,    IO_START_2,     IO_SIZE_2,      MT_DEVICE },
  83        { AUX_BASE,     AUX_START,      AUX_SIZE,       MT_DEVICE },
  84        { FLASH1_BASE,  FLASH1_START,   FLASH1_SIZE,    MT_DEVICE },
  85        { FLASH2_BASE,  FLASH2_START,   FLASH2_SIZE,    MT_DEVICE }
  86};
  87
  88static void __init l7200_map_io(void)
  89{
  90        iotable_init(l7200_io_desc, ARRAY_SIZE(l7200_io_desc));
  91}
  92
  93MACHINE_START(L7200, "LinkUp Systems L7200")
  94        /* Maintainer: Steve Hill / Scott McConnell */
  95        .phys_io        = 0x80040000,
  96        .io_pg_offst    = ((0xd0000000) >> 18) & 0xfffc,
  97        .map_io         = l7200_map_io,
  98        .init_irq       = l7200_init_irq,
  99MACHINE_END
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