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

   1 /*
   2  * ip22-setup.c: SGI specific setup, including init of the feature struct.
   3  *
   4  * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
   5  * Copyright (C) 1997, 1998 Ralf Baechle (ralf@gnu.org)
   6  */
   7 #include <linux/config.h>
   8 #include <linux/ds1286.h>
   9 #include <linux/init.h>
  10 #include <linux/kernel.h>
  11 #include <linux/kdev_t.h>
  12 #include <linux/types.h>
  13 #include <linux/module.h>
  14 #include <linux/console.h>
  15 #include <linux/sched.h>
  16 #include <linux/tty.h>
  17
  18 #include <asm/addrspace.h>
  19 #include <asm/bcache.h>
  20 #include <asm/bootinfo.h>
  21 #include <asm/irq.h>
  22 #include <asm/reboot.h>
  23 #include <asm/time.h>
  24 #include <asm/gdb-stub.h>
  25 #include <asm/io.h>
  26 #include <asm/traps.h>
  27 #include <asm/sgialib.h>
  28 #include <asm/sgi/mc.h>
  29 #include <asm/sgi/hpc3.h>
  30 #include <asm/sgi/ip22.h>
  31
  32 unsigned long sgi_gfxaddr;
  33
  34 /*
  35  * Stop-A is originally a Sun thing that isn't standard on IP22 so to avoid
  36  * accidents it's disabled by default on IP22.
  37  *
  38  * FIXME: provide a mechanism to change the value of stop_a_enabled.
  39  */
  40 int stop_a_enabled;
  41
  42 void ip22_do_break(void)
  43 {
  44         if (!stop_a_enabled)
  45                 return;
  46
  47         printk("\n");
  48         ArcEnterInteractiveMode();
  49 }
  50
  51 EXPORT_SYMBOL(ip22_do_break);
  52
  53 extern void ip22_be_init(void) __init;
  54 extern void ip22_time_init(void) __init;
  55
  56 void __init plat_setup(void)
  57 {
  58         char *ctype;
  59         char *cserial;
  60
  61         board_be_init = ip22_be_init;
  62         ip22_time_init();
  63
  64         /* Init the INDY HPC I/O controller.  Need to call this before
  65          * fucking with the memory controller because it needs to know the
  66          * boardID and whether this is a Guiness or a FullHouse machine.
  67          */
  68         sgihpc_init();
  69
  70         /* Init INDY memory controller. */
  71         sgimc_init();
  72
  73 #ifdef CONFIG_BOARD_SCACHE
  74         /* Now enable boardcaches, if any. */
  75         indy_sc_init();
  76 #endif
  77
  78         /* Set EISA IO port base for Indigo2
  79          * ioremap cannot fail */
  80         set_io_port_base((unsigned long)ioremap(0x00080000,
  81                                                 0x1fffffff - 0x00080000));
  82         /* ARCS console environment variable is set to "g?" for
  83          * graphics console, it is set to "d" for the first serial
  84          * line and "d2" for the second serial line.
  85          *
  86          * Need to check if the case is 'g' but no keyboard:
  87          * (ConsoleIn/Out = serial)
  88          */
  89         ctype = ArcGetEnvironmentVariable("console");
  90         cserial = ArcGetEnvironmentVariable("ConsoleOut");
  91
  92         if ((ctype && *ctype == 'd') || (cserial && *cserial == 's')) {
  93                 static char options[8];
  94                 char *baud = ArcGetEnvironmentVariable("dbaud");
  95                 if (baud)
  96                         strcpy(options, baud);
  97                 add_preferred_console("ttyS", *(ctype + 1) == '2' ? 1 : 0,
  98                                       baud ? options : NULL);
  99         } else if (!ctype || *ctype != 'g') {
 100                 /* Use ARC if we don't want serial ('d') or graphics ('g'). */
 101                 prom_flags |= PROM_FLAG_USE_AS_CONSOLE;
 102                 add_preferred_console("arc", 0, NULL);
 103         }
 104
 105 #ifdef CONFIG_KGDB
 106         {
 107         char *kgdb_ttyd = prom_getcmdline();
 108
 109         if ((kgdb_ttyd = strstr(kgdb_ttyd, "kgdb=ttyd")) != NULL) {
 110                 int line;
 111                 kgdb_ttyd += strlen("kgdb=ttyd");
 112                 if (*kgdb_ttyd != '1' && *kgdb_ttyd != '2')
 113                         printk(KERN_INFO "KGDB: Uknown serial line /dev/ttyd%c"
 114                                ", falling back to /dev/ttyd1\n", *kgdb_ttyd);
 115                 line = *kgdb_ttyd == '2' ? 0 : 1;
 116                 printk(KERN_INFO "KGDB: Using serial line /dev/ttyd%d for "
 117                        "session\n", line ? 1 : 2);
 118                 rs_kgdb_hook(line);
 119
 120                 printk(KERN_INFO "KGDB: Using serial line /dev/ttyd%d for "
 121                        "session, please connect your debugger\n", line ? 1:2);
 122
 123                 kgdb_enabled = 1;
 124                 /* Breakpoints and stuff are in sgi_irq_setup() */
 125         }
 126         }
 127 #endif
 128
 129 #if defined(CONFIG_VT) && defined(CONFIG_SGI_NEWPORT_CONSOLE)
 130         {
 131                 ULONG *gfxinfo;
 132                 ULONG * (*__vec)(void) = (void *) (long)
 133                         *((_PULONG *)(long)((PROMBLOCK)->pvector + 0x20));
 134
 135                 gfxinfo = __vec();
 136                 sgi_gfxaddr = ((gfxinfo[1] >= 0xa0000000
 137                                && gfxinfo[1] <= 0xc0000000)
 138                                ? gfxinfo[1] - 0xa0000000 : 0);
 139
 140                 /* newport addresses? */
 141                 if (sgi_gfxaddr == 0x1f0f0000 || sgi_gfxaddr == 0x1f4f0000) {
 142                         conswitchp = &newport_con;
 143                 }
 144         }
 145 #endif
 146 }