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 <asm/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
  48 static void l7200_mask_irq(unsigned int irq)
  49 {
  50         IRQ_ENABLECLEAR = 1 << irq;
  51 }
  52
  53 static void l7200_unmask_irq(unsigned int irq)
  54 {
  55         IRQ_ENABLE = 1 << irq;
  56 }
  57
  58 static struct irq_chip l7200_irq_chip = {
  59         .ack            = l7200_mask_irq,
  60         .mask           = l7200_mask_irq,
  61         .unmask         = l7200_unmask_irq
  62 };
  63
  64 static 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
  80 static 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
  88 static void __init l7200_map_io(void)
  89 {
  90         iotable_init(l7200_io_desc, ARRAY_SIZE(l7200_io_desc));
  91 }
  92
  93 MACHINE_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,
  99 MACHINE_END
 100