arch/sh/boards/mach-dreamcast/setup.c

   1 /*
   2  * arch/sh/boards/dreamcast/setup.c
   3  *
   4  * Hardware support for the Sega Dreamcast.
   5  *
   6  * Copyright (c) 2001, 2002 M. R. Brown <mrbrown@linuxdc.org>
   7  * Copyright (c) 2002, 2003, 2004 Paul Mundt <lethal@linux-sh.org>
   8  *
   9  * This file is part of the LinuxDC project (www.linuxdc.org)
  10  *
  11  * Released under the terms of the GNU GPL v2.0.
  12  *
  13  * This file originally bore the message (with enclosed-$):
  14  *      Id: setup_dc.c,v 1.5 2001/05/24 05:09:16 mrbrown Exp
  15  *      SEGA Dreamcast support
  16  */
  17
  18 #include <linux/sched.h>
  19 #include <linux/kernel.h>
  20 #include <linux/param.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/init.h>
  23 #include <linux/irq.h>
  24 #include <linux/device.h>
  25 #include <asm/io.h>
  26 #include <asm/irq.h>
  27 #include <asm/rtc.h>
  28 #include <asm/machvec.h>
  29 #include <mach/sysasic.h>
  30
  31 extern struct irq_chip systemasic_int;
  32 extern void aica_time_init(void);
  33 extern int gapspci_init(void);
  34 extern int systemasic_irq_demux(int);
  35
  36 static void __init dreamcast_setup(char **cmdline_p)
  37 {
  38         int i;
  39
  40         /* Mask all hardware events */
  41         /* XXX */
  42
  43         /* Acknowledge any previous events */
  44         /* XXX */
  45
  46         __set_io_port_base(0xa0000000);
  47
  48         /* Assign all virtual IRQs to the System ASIC int. handler */
  49         for (i = HW_EVENT_IRQ_BASE; i < HW_EVENT_IRQ_MAX; i++)
  50                 set_irq_chip_and_handler(i, &systemasic_int,
  51                                          handle_level_irq);
  52
  53         board_time_init = aica_time_init;
  54
  55 #ifdef CONFIG_PCI
  56         if (gapspci_init() < 0)
  57                 printk(KERN_WARNING "GAPSPCI was not detected.\n");
  58 #endif
  59 }
  60
  61 static struct sh_machine_vector mv_dreamcast __initmv = {
  62         .mv_name                = "Sega Dreamcast",
  63         .mv_setup               = dreamcast_setup,
  64         .mv_irq_demux           = systemasic_irq_demux,
  65 };