include/asm-arm/arch-nexuspci/irq.h

   1 /*
   2  * include/asm-arm/arch-nexuspci/irq.h
   3  *
   4  * Copyright (C) 1998, 1999, 2000 Philip Blundell
   5  */
   6
   7 /*
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * as published by the Free Software Foundation; either version
  11  * 2 of the License, or (at your option) any later version.
  12  */
  13
  14 #include <asm/io.h>
  15
  16 #define fixup_irq(x) (x)
  17
  18 extern unsigned long soft_irq_mask;
  19
  20 static const unsigned char irq_cmd[] =
  21 {
  22         INTCONT_IRQ_DUART,
  23         INTCONT_IRQ_PLX,
  24         INTCONT_IRQ_D,
  25         INTCONT_IRQ_C,
  26         INTCONT_IRQ_B,
  27         INTCONT_IRQ_A,
  28         INTCONT_IRQ_SYSERR
  29 };
  30
  31 static void ftvpci_mask_irq(unsigned int irq)
  32 {
  33         __raw_writel(irq_cmd[irq], INTCONT_BASE);
  34         soft_irq_mask &= ~(1<<irq);
  35 }
  36
  37 static void ftvpci_unmask_irq(unsigned int irq)
  38 {
  39         soft_irq_mask |= (1<<irq);
  40         __raw_writel(irq_cmd[irq] | 1, INTCONT_BASE);
  41 }
  42
  43 static __inline__ void irq_init_irq(void)
  44 {
  45         unsigned int i;
  46
  47         /* Mask all FIQs */
  48         __raw_writel(INTCONT_FIQ_PLX, INTCONT_BASE);
  49         __raw_writel(INTCONT_FIQ_D, INTCONT_BASE);
  50         __raw_writel(INTCONT_FIQ_C, INTCONT_BASE);
  51         __raw_writel(INTCONT_FIQ_B, INTCONT_BASE);
  52         __raw_writel(INTCONT_FIQ_A, INTCONT_BASE);
  53         __raw_writel(INTCONT_FIQ_SYSERR, INTCONT_BASE);
  54
  55         /* Disable all interrupts initially. */
  56         for (i = 0; i < NR_IRQS; i++) {
  57                 if (i >= FIRST_IRQ && i <= LAST_IRQ) {
  58                         irq_desc[i].valid       = 1;
  59                         irq_desc[i].probe_ok    = 1;
  60                         irq_desc[i].mask_ack    = ftvpci_mask_irq;
  61                         irq_desc[i].mask        = ftvpci_mask_irq;
  62                         irq_desc[i].unmask      = ftvpci_unmask_irq;
  63                         ftvpci_mask_irq(i);
  64                 } else {
  65                         irq_desc[i].valid       = 0;
  66                         irq_desc[i].probe_ok    = 0;
  67                 }
  68         }
  69 }