ip22-setup.c

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/*
 * ip22-setup.c: SGI specific setup, including init of the feature struct.
 *
 * Copyright (C) 1996 David S. Miller ([email protected])
 * Copyright (C) 1997, 1998 Ralf Baechle ([email protected])
 */
#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/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>

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] __initdata;
        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);
    }
}