LXR linux/arch/mips/sgi-ip22/ip22-setup.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * ip22-setup.c: SGI specific setup, including init of the feature struct.
   4 *
   5 * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
   6 * Copyright (C) 1997, 1998 Ralf Baechle (ralf@gnu.org)
   7 */
   8#include <linux/init.h>
   9#include <linux/kernel.h>
  10#include <linux/kdev_t.h>
  11#include <linux/types.h>
  12#include <linux/console.h>
  13#include <linux/sched.h>
  14#include <linux/tty.h>
  15
  16#include <asm/addrspace.h>
  17#include <asm/bcache.h>
  18#include <asm/bootinfo.h>
  19#include <asm/irq.h>
  20#include <asm/reboot.h>
  21#include <asm/time.h>
  22#include <asm/io.h>
  23#include <asm/traps.h>
  24#include <asm/sgialib.h>
  25#include <asm/sgi/mc.h>
  26#include <asm/sgi/hpc3.h>
  27#include <asm/sgi/ip22.h>
  28
  29extern void ip22_be_init(void) __init;
  30
  31void __init plat_mem_setup(void)
  32{
  33        char *ctype;
  34        char *cserial;
  35
  36        board_be_init = ip22_be_init;
  37
  38        /* Init the INDY HPC I/O controller.  Need to call this before
  39         * fucking with the memory controller because it needs to know the
  40         * boardID and whether this is a Guiness or a FullHouse machine.
  41         */
  42        sgihpc_init();
  43
  44        /* Init INDY memory controller. */
  45        sgimc_init();
  46
  47#ifdef CONFIG_BOARD_SCACHE
  48        /* Now enable boardcaches, if any. */
  49        indy_sc_init();
  50#endif
  51
  52        /* Set EISA IO port base for Indigo2
  53         * ioremap cannot fail */
  54        set_io_port_base((unsigned long)ioremap(0x00080000,
  55                                                0x1fffffff - 0x00080000));
  56        /* ARCS console environment variable is set to "g?" for
  57         * graphics console, it is set to "d" for the first serial
  58         * line and "d2" for the second serial line.
  59         *
  60         * Need to check if the case is 'g' but no keyboard:
  61         * (ConsoleIn/Out = serial)
  62         */
  63        ctype = ArcGetEnvironmentVariable("console");
  64        cserial = ArcGetEnvironmentVariable("ConsoleOut");
  65
  66        if ((ctype && *ctype == 'd') || (cserial && *cserial == 's')) {
  67                static char options[8] __initdata;
  68                char *baud = ArcGetEnvironmentVariable("dbaud");
  69                if (baud)
  70                        strcpy(options, baud);
  71                add_preferred_console("ttyS", *(ctype + 1) == '2' ? 1 : 0,
  72                                      baud ? options : NULL);
  73        } else if (!ctype || *ctype != 'g') {
  74                /* Use ARC if we don't want serial ('d') or graphics ('g'). */
  75                prom_flags |= PROM_FLAG_USE_AS_CONSOLE;
  76                add_preferred_console("arc", 0, NULL);
  77        }
  78}
  79