arch/sh/boards/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
  26 #include <asm/io.h>
  27 #include <asm/irq.h>
  28 #include <asm/machvec.h>
  29 #include <asm/machvec_init.h>
  30 #include <asm/mach/sysasic.h>
  31
  32 extern struct hw_interrupt_type systemasic_int;
  33 /* XXX: Move this into it's proper header. */
  34 extern void (*board_time_init)(void);
  35 extern void aica_time_init(void);
  36 extern int gapspci_init(void);
  37 extern int systemasic_irq_demux(int);
  38
  39 void *dreamcast_consistent_alloc(struct device *, size_t, dma_addr_t *, int);
  40 int dreamcast_consistent_free(struct device *, size_t, void *, dma_addr_t);
  41
  42 const char *get_system_type(void)
  43 {
  44         return "Sega Dreamcast";
  45 }
  46
  47 struct sh_machine_vector mv_dreamcast __initmv = {
  48         .mv_nr_irqs             = NR_IRQS,
  49
  50         .mv_irq_demux           = systemasic_irq_demux,
  51
  52 #ifdef CONFIG_PCI
  53         .mv_consistent_alloc    = dreamcast_consistent_alloc,
  54         .mv_consistent_free     = dreamcast_consistent_free,
  55 #endif
  56 };
  57 ALIAS_MV(dreamcast)
  58
  59 int __init platform_setup(void)
  60 {
  61         int i;
  62
  63         /* Mask all hardware events */
  64         /* XXX */
  65
  66         /* Acknowledge any previous events */
  67         /* XXX */
  68
  69         __set_io_port_base(0xa0000000);
  70
  71         /* Assign all virtual IRQs to the System ASIC int. handler */
  72         for (i = HW_EVENT_IRQ_BASE; i < HW_EVENT_IRQ_MAX; i++)
  73                 irq_desc[i].handler = &systemasic_int;
  74
  75         board_time_init = aica_time_init;
  76
  77 #ifdef CONFIG_PCI
  78         if (gapspci_init() < 0)
  79                 printk(KERN_WARNING "GAPSPCI was not detected.\n");
  80 #endif
  81
  82         return 0;
  83 }