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
  29 void __init plat_mem_setup(void)
  30 {
  31         char *ctype;
  32         char *cserial;
  33
  34         board_be_init = ip22_be_init;
  35
  36         /* Init the INDY HPC I/O controller.  Need to call this before
  37          * fucking with the memory controller because it needs to know the
  38          * boardID and whether this is a Guiness or a FullHouse machine.
  39          */
  40         sgihpc_init();
  41
  42         /* Init INDY memory controller. */
  43         sgimc_init();
  44
  45 #ifdef CONFIG_BOARD_SCACHE
  46         /* Now enable boardcaches, if any. */
  47         indy_sc_init();
  48 #endif
  49
  50         /* Set EISA IO port base for Indigo2
  51          * ioremap cannot fail */
  52         set_io_port_base((unsigned long)ioremap(0x00080000,
  53                                                 0x1fffffff - 0x00080000));
  54         /* ARCS console environment variable is set to "g?" for
  55          * graphics console, it is set to "d" for the first serial
  56          * line and "d2" for the second serial line.
  57          *
  58          * Need to check if the case is 'g' but no keyboard:
  59          * (ConsoleIn/Out = serial)
  60          */
  61         ctype = ArcGetEnvironmentVariable("console");
  62         cserial = ArcGetEnvironmentVariable("ConsoleOut");
  63
  64         if ((ctype && *ctype == 'd') || (cserial && *cserial == 's')) {
  65                 static char options[8] __initdata;
  66                 char *baud = ArcGetEnvironmentVariable("dbaud");
  67                 if (baud)
  68                         strcpy(options, baud);
  69                 add_preferred_console("ttyS", *(ctype + 1) == '2' ? 1 : 0,
  70                                       baud ? options : NULL);
  71         } else if (!ctype || *ctype != 'g') {
  72                 /* Use ARC if we don't want serial ('d') or graphics ('g'). */
  73                 prom_flags |= PROM_FLAG_USE_AS_CONSOLE;
  74                 add_preferred_console("arc", 0, NULL);
  75         }
  76 }