arch/arm/mach-tbox/core.c

   1 /*
   2  *  linux/arch/arm/mm/mm-tbox.c
   3  *
   4  *  Copyright (C) 1998, 1999, 2000 Phil Blundell
   5  *  Copyright (C) 1998-1999 Russell King
   6  *
   7  *  Extra MM routines for the Tbox architecture
   8  */
   9 #include <linux/kernel.h>
  10 #include <linux/mm.h>
  11 #include <linux/init.h>
  12
  13 #include <asm/elf.h>
  14 #include <asm/setup.h>
  15 #include <asm/mach-types.h>
  16 #include <asm/io.h>
  17 #include <asm/pgtable.h>
  18 #include <asm/page.h>
  19
  20 #include <asm/mach/arch.h>
  21 #include <asm/mach/map.h>
  22
  23 extern unsigned long soft_irq_mask;
  24
  25 static void tbox_mask_irq(unsigned int irq)
  26 {
  27         __raw_writel(0, INTCONT + (irq << 2));
  28         soft_irq_mask &= ~(1<<irq);
  29 }
  30
  31 static void tbox_unmask_irq(unsigned int irq)
  32 {
  33         soft_irq_mask |= (1<<irq);
  34         __raw_writel(1, INTCONT + (irq << 2));
  35 }
  36
  37 static void tbox_init_irq(void)
  38 {
  39         unsigned int i;
  40
  41         /* Disable all interrupts initially. */
  42         for (i = 0; i < NR_IRQS; i++) {
  43                 if (i <= 10 || (i >= 12 && i <= 13)) {
  44                         irq_desc[i].valid       = 1;
  45                         irq_desc[i].probe_ok    = 0;
  46                         irq_desc[i].mask_ack    = tbox_mask_irq;
  47                         irq_desc[i].mask        = tbox_mask_irq;
  48                         irq_desc[i].unmask      = tbox_unmask_irq;
  49                         tbox_mask_irq(i);
  50                 } else {
  51                         irq_desc[i].valid       = 0;
  52                         irq_desc[i].probe_ok    = 0;
  53                 }
  54         }
  55 }
  56
  57 static struct map_desc tbox_io_desc[] __initdata = {
  58         /* See hardware.h for details */
  59         { IO_BASE,      IO_START,       0x00100000, MT_DEVICE }
  60 };
  61
  62 static void __init tbox_map_io(void)
  63 {
  64         iotable_init(tbox_io_desc, ARRAY_SIZE(tbox_io_desc));
  65 }
  66
  67 MACHINE_START(TBOX, "unknown-TBOX")
  68         MAINTAINER("Philip Blundell")
  69         BOOT_MEM(0x80000000, 0x00400000, 0xe0000000)
  70         MAPIO(tbox_map_io)
  71         INITIRQ(tbox_init_irq)
  72 MACHINE_END
  73