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ip22-setup.c

/*
 * ip22-setup.c: SGI specific setup, including init of the feature struct.
 *
 * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
 * Copyright (C) 1997, 1998 Ralf Baechle (ralf@gnu.org)
 */
#include <linux/ds1286.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/kdev_t.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/console.h>
#include <linux/sched.h>
#include <linux/tty.h>

#include <asm/addrspace.h>
#include <asm/bcache.h>
#include <asm/bootinfo.h>
#include <asm/irq.h>
#include <asm/reboot.h>
#include <asm/time.h>
#include <asm/gdb-stub.h>
#include <asm/io.h>
#include <asm/traps.h>
#include <asm/sgialib.h>
#include <asm/sgi/mc.h>
#include <asm/sgi/hpc3.h>
#include <asm/sgi/ip22.h>

unsigned long sgi_gfxaddr;
EXPORT_SYMBOL_GPL(sgi_gfxaddr);

extern void ip22_be_init(void) __init;

void __init plat_mem_setup(void)
{
      char *ctype;
      char *cserial;

      board_be_init = ip22_be_init;

      /* Init the INDY HPC I/O controller.  Need to call this before
       * fucking with the memory controller because it needs to know the
       * boardID and whether this is a Guiness or a FullHouse machine.
       */
      sgihpc_init();

      /* Init INDY memory controller. */
      sgimc_init();

#ifdef CONFIG_BOARD_SCACHE
      /* Now enable boardcaches, if any. */
      indy_sc_init();
#endif

      /* Set EISA IO port base for Indigo2
       * ioremap cannot fail */
      set_io_port_base((unsigned long)ioremap(0x00080000,
                                    0x1fffffff - 0x00080000));
      /* ARCS console environment variable is set to "g?" for
       * graphics console, it is set to "d" for the first serial
       * line and "d2" for the second serial line.
       *
       * Need to check if the case is 'g' but no keyboard:
       * (ConsoleIn/Out = serial)
       */
      ctype = ArcGetEnvironmentVariable("console");
      cserial = ArcGetEnvironmentVariable("ConsoleOut");

      if ((ctype && *ctype == 'd') || (cserial && *cserial == 's')) {
            static char options[8];
            char *baud = ArcGetEnvironmentVariable("dbaud");
            if (baud)
                  strcpy(options, baud);
            add_preferred_console("ttyS", *(ctype + 1) == '2' ? 1 : 0,
                              baud ? options : NULL);
      } else if (!ctype || *ctype != 'g') {
            /* Use ARC if we don't want serial ('d') or graphics ('g'). */
            prom_flags |= PROM_FLAG_USE_AS_CONSOLE;
            add_preferred_console("arc", 0, NULL);
      }

#ifdef CONFIG_KGDB
      {
      char *kgdb_ttyd = prom_getcmdline();

      if ((kgdb_ttyd = strstr(kgdb_ttyd, "kgdb=ttyd")) != NULL) {
            int line;
            kgdb_ttyd += strlen("kgdb=ttyd");
            if (*kgdb_ttyd != '1' && *kgdb_ttyd != '2')
                  printk(KERN_INFO "KGDB: Uknown serial line /dev/ttyd%c"
                         ", falling back to /dev/ttyd1\n", *kgdb_ttyd);
            line = *kgdb_ttyd == '2' ? 0 : 1;
            printk(KERN_INFO "KGDB: Using serial line /dev/ttyd%d for "
                   "session\n", line ? 1 : 2);
            rs_kgdb_hook(line);

            printk(KERN_INFO "KGDB: Using serial line /dev/ttyd%d for "
                   "session, please connect your debugger\n", line ? 1:2);

            kgdb_enabled = 1;
            /* Breakpoints and stuff are in sgi_irq_setup() */
      }
      }
#endif

#if defined(CONFIG_VT) && defined(CONFIG_SGI_NEWPORT_CONSOLE)
      {
            ULONG *gfxinfo;
            ULONG * (*__vec)(void) = (void *) (long)
                  *((_PULONG *)(long)((PROMBLOCK)->pvector + 0x20));

            gfxinfo = __vec();
            sgi_gfxaddr = ((gfxinfo[1] >= 0xa0000000
                         && gfxinfo[1] <= 0xc0000000)
                         ? gfxinfo[1] - 0xa0000000 : 0);

            /* newport addresses? */
            if (sgi_gfxaddr == 0x1f0f0000 || sgi_gfxaddr == 0x1f4f0000) {
                  conswitchp = &newport_con;
            }
      }
#endif
}

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