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
  11 #include <asm/hardware.h>
  12 #include <asm/page.h>
  13
  14 #include <asm/mach/map.h>
  15 #include <asm/arch/hardware.h>
  16
  17 /*
  18  * IRQ base register
  19  */
  20 #define IRQ_BASE        (IO_BASE_2 + 0x1000)
  21
  22 /*
  23  * Normal IRQ registers
  24  */
  25 #define IRQ_STATUS      (*(volatile unsigned long *) (IRQ_BASE + 0x000))
  26 #define IRQ_RAWSTATUS   (*(volatile unsigned long *) (IRQ_BASE + 0x004))
  27 #define IRQ_ENABLE      (*(volatile unsigned long *) (IRQ_BASE + 0x008))
  28 #define IRQ_ENABLECLEAR (*(volatile unsigned long *) (IRQ_BASE + 0x00c))
  29 #define IRQ_SOFT        (*(volatile unsigned long *) (IRQ_BASE + 0x010))
  30 #define IRQ_SOURCESEL   (*(volatile unsigned long *) (IRQ_BASE + 0x018))
  31
  32 /*
  33  * Fast IRQ registers
  34  */
  35 #define FIQ_STATUS      (*(volatile unsigned long *) (IRQ_BASE + 0x100))
  36 #define FIQ_RAWSTATUS   (*(volatile unsigned long *) (IRQ_BASE + 0x104))
  37 #define FIQ_ENABLE      (*(volatile unsigned long *) (IRQ_BASE + 0x108))
  38 #define FIQ_ENABLECLEAR (*(volatile unsigned long *) (IRQ_BASE + 0x10c))
  39 #define FIQ_SOFT        (*(volatile unsigned long *) (IRQ_BASE + 0x110))
  40 #define FIQ_SOURCESEL   (*(volatile unsigned long *) (IRQ_BASE + 0x118))
  41
  42 static void l7200_mask_irq(unsigned int irq)
  43 {
  44         IRQ_ENABLECLEAR = 1 << irq;
  45 }
  46
  47 static void l7200_unmask_irq(unsigned int irq)
  48 {
  49         IRQ_ENABLE = 1 << irq;
  50 }
  51
  52 static void __init l7200_init_irq(void)
  53 {
  54         int irq;
  55
  56         IRQ_ENABLECLEAR = 0xffffffff;   /* clear all interrupt enables */
  57         FIQ_ENABLECLEAR = 0xffffffff;   /* clear all fast interrupt enables */
  58
  59         for (irq = 0; irq < NR_IRQS; irq++) {
  60                 irq_desc[irq].valid     = 1;
  61                 irq_desc[irq].probe_ok  = 1;
  62                 irq_desc[irq].mask_ack  = l7200_mask_irq;
  63                 irq_desc[irq].mask      = l7200_mask_irq;
  64                 irq_desc[irq].unmask    = l7200_unmask_irq;
  65         }
  66
  67         init_FIQ();
  68 }
  69
  70 static struct map_desc l7200_io_desc[] __initdata = {
  71         { IO_BASE,      IO_START,       IO_SIZE,        MT_DEVICE },
  72         { IO_BASE_2,    IO_START_2,     IO_SIZE_2,      MT_DEVICE },
  73         { AUX_BASE,     AUX_START,      AUX_SIZE,       MT_DEVICE },
  74         { FLASH1_BASE,  FLASH1_START,   FLASH1_SIZE,    MT_DEVICE },
  75         { FLASH2_BASE,  FLASH2_START,   FLASH2_SIZE,    MT_DEVICE }
  76 };
  77
  78 static void __init l7200_map_io(void)
  79 {
  80         iotable_init(l7200_io_desc, ARRAY_SIZE(l7200_io_desc));
  81 }
  82
  83 MACHINE_START(L7200, "LinkUp Systems L7200")
  84         /* Maintainer: Steve Hill / Scott McConnell */
  85         .phys_ram       = 0xf0000000,
  86         .phys_io        = 0x80040000,
  87         .io_pg_offst    = ((0xd0000000) >> 18) & 0xfffc,
  88         .map_io         = l7200_map_io,
  89         .init_irq       = l7200_init_irq,
  90 MACHINE_END
  91