release/src-rt-6.x/linux/linux-2.6/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/ds1286.h>
   8 #include <linux/init.h>
   9 #include <linux/kernel.h>
  10 #include <linux/kdev_t.h>
  11 #include <linux/types.h>
  12 #include <linux/module.h>
  13 #include <linux/console.h>
  14 #include <linux/sched.h>
  15 #include <linux/tty.h>
  16
  17 #include <asm/addrspace.h>
  18 #include <asm/bcache.h>
  19 #include <asm/bootinfo.h>
  20 #include <asm/irq.h>
  21 #include <asm/reboot.h>
  22 #include <asm/time.h>
  23 #include <asm/gdb-stub.h>
  24 #include <asm/io.h>
  25 #include <asm/traps.h>
  26 #include <asm/sgialib.h>
  27 #include <asm/sgi/mc.h>
  28 #include <asm/sgi/hpc3.h>
  29 #include <asm/sgi/ip22.h>
  30
  31 unsigned long sgi_gfxaddr;
  32
  33 /*
  34  * Stop-A is originally a Sun thing that isn't standard on IP22 so to avoid
  35  * accidents it's disabled by default on IP22.
  36  *
  37  * FIXME: provide a mechanism to change the value of stop_a_enabled.
  38  */
  39 int stop_a_enabled;
  40
  41 void ip22_do_break(void)
  42 {
  43         if (!stop_a_enabled)
  44                 return;
  45
  46         printk("\n");
  47         ArcEnterInteractiveMode();
  48 }
  49
  50 EXPORT_SYMBOL(ip22_do_break);
  51
  52 extern void ip22_be_init(void) __init;
  53 extern void ip22_time_init(void) __init;
  54
  55 void __init plat_mem_setup(void)
  56 {
  57         char *ctype;
  58         char *cserial;
  59
  60         board_be_init = ip22_be_init;
  61         ip22_time_init();
  62
  63         /* Init the INDY HPC I/O controller.  Need to call this before
  64          * fucking with the memory controller because it needs to know the
  65          * boardID and whether this is a Guiness or a FullHouse machine.
  66          */
  67         sgihpc_init();
  68
  69         /* Init INDY memory controller. */
  70         sgimc_init();
  71
  72 #ifdef CONFIG_BOARD_SCACHE
  73         /* Now enable boardcaches, if any. */
  74         indy_sc_init();
  75 #endif
  76
  77         /* Set EISA IO port base for Indigo2
  78          * ioremap cannot fail */
  79         set_io_port_base((unsigned long)ioremap(0x00080000,
  80                                                 0x1fffffff - 0x00080000));
  81         /* ARCS console environment variable is set to "g?" for
  82          * graphics console, it is set to "d" for the first serial
  83          * line and "d2" for the second serial line.
  84          *
  85          * Need to check if the case is 'g' but no keyboard:
  86          * (ConsoleIn/Out = serial)
  87          */
  88         ctype = ArcGetEnvironmentVariable("console");
  89         cserial = ArcGetEnvironmentVariable("ConsoleOut");
  90
  91         if ((ctype && *ctype == 'd') || (cserial && *cserial == 's')) {
  92                 static char options[8];
  93                 char *baud = ArcGetEnvironmentVariable("dbaud");
  94                 if (baud)
  95                         strcpy(options, baud);
  96                 add_preferred_console("ttyS", *(ctype + 1) == '2' ? 1 : 0,
  97                                       baud ? options : NULL);
  98         } else if (!ctype || *ctype != 'g') {
  99                 /* Use ARC if we don't want serial ('d') or graphics ('g'). */
 100                 prom_flags |= PROM_FLAG_USE_AS_CONSOLE;
 101                 add_preferred_console("arc", 0, NULL);
 102         }
 103
 104 #ifdef CONFIG_KGDB
 105         {
 106         char *kgdb_ttyd = prom_getcmdline();
 107
 108         if ((kgdb_ttyd = strstr(kgdb_ttyd, "kgdb=ttyd")) != NULL) {
 109                 int line;
 110                 kgdb_ttyd += strlen("kgdb=ttyd");
 111                 if (*kgdb_ttyd != '1' && *kgdb_ttyd != '2')
 112                         printk(KERN_INFO "KGDB: Uknown serial line /dev/ttyd%c"
 113                                ", falling back to /dev/ttyd1\n", *kgdb_ttyd);
 114                 line = *kgdb_ttyd == '2' ? 0 : 1;
 115                 printk(KERN_INFO "KGDB: Using serial line /dev/ttyd%d for "
 116                        "session\n", line ? 1 : 2);
 117                 rs_kgdb_hook(line);
 118
 119                 printk(KERN_INFO "KGDB: Using serial line /dev/ttyd%d for "
 120                        "session, please connect your debugger\n", line ? 1:2);
 121
 122                 kgdb_enabled = 1;
 123                 /* Breakpoints and stuff are in sgi_irq_setup() */
 124         }
 125         }
 126 #endif
 127
 128 #if defined(CONFIG_VT) && defined(CONFIG_SGI_NEWPORT_CONSOLE)
 129         {
 130                 ULONG *gfxinfo;
 131                 ULONG * (*__vec)(void) = (void *) (long)
 132                         *((_PULONG *)(long)((PROMBLOCK)->pvector + 0x20));
 133
 134                 gfxinfo = __vec();
 135                 sgi_gfxaddr = ((gfxinfo[1] >= 0xa0000000
 136                                && gfxinfo[1] <= 0xc0000000)
 137                                ? gfxinfo[1] - 0xa0000000 : 0);
 138
 139                 /* newport addresses? */
 140                 if (sgi_gfxaddr == 0x1f0f0000 || sgi_gfxaddr == 0x1f4f0000) {
 141                         conswitchp = &newport_con;
 142                 }
 143         }
 144 #endif
 145 }