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 EXPORT_SYMBOL_GPL(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 55 void __init plat_mem_setup(void) 56 { 57 char *ctype; 58 char *cserial; 59 60 board_be_init = ip22_be_init; 61 62 /* Init the INDY HPC I/O controller. Need to call this before 63 * fucking with the memory controller because it needs to know the 64 * boardID and whether this is a Guiness or a FullHouse machine. 65 */ 66 sgihpc_init(); 67 68 /* Init INDY memory controller. */ 69 sgimc_init(); 70 71 #ifdef CONFIG_BOARD_SCACHE 72 /* Now enable boardcaches, if any. */ 73 indy_sc_init(); 74 #endif 75 76 /* Set EISA IO port base for Indigo2 77 * ioremap cannot fail */ 78 set_io_port_base((unsigned long)ioremap(0x00080000, 79 0x1fffffff - 0x00080000)); 80 /* ARCS console environment variable is set to "g?" for 81 * graphics console, it is set to "d" for the first serial 82 * line and "d2" for the second serial line. 83 * 84 * Need to check if the case is 'g' but no keyboard: 85 * (ConsoleIn/Out = serial) 86 */ 87 ctype = ArcGetEnvironmentVariable("console"); 88 cserial = ArcGetEnvironmentVariable("ConsoleOut"); 89 90 if ((ctype && *ctype == 'd') || (cserial && *cserial == 's')) { 91 static char options[8]; 92 char *baud = ArcGetEnvironmentVariable("dbaud"); 93 if (baud) 94 strcpy(options, baud); 95 add_preferred_console("ttyS", *(ctype + 1) == '2' ? 1 : 0, 96 baud ? options : NULL); 97 } else if (!ctype || *ctype != 'g') { 98 /* Use ARC if we don't want serial ('d') or graphics ('g'). */ 99 prom_flags |= PROM_FLAG_USE_AS_CONSOLE; 100 add_preferred_console("arc", 0, NULL); 101 } 102 103 #ifdef CONFIG_KGDB 104 { 105 char *kgdb_ttyd = prom_getcmdline(); 106 107 if ((kgdb_ttyd = strstr(kgdb_ttyd, "kgdb=ttyd")) != NULL) { 108 int line; 109 kgdb_ttyd += strlen("kgdb=ttyd"); 110 if (*kgdb_ttyd != '1' && *kgdb_ttyd != '2') 111 printk(KERN_INFO "KGDB: Uknown serial line /dev/ttyd%c" 112 ", falling back to /dev/ttyd1\n", *kgdb_ttyd); 113 line = *kgdb_ttyd == '2' ? 0 : 1; 114 printk(KERN_INFO "KGDB: Using serial line /dev/ttyd%d for " 115 "session\n", line ? 1 : 2); 116 rs_kgdb_hook(line); 117 118 printk(KERN_INFO "KGDB: Using serial line /dev/ttyd%d for " 119 "session, please connect your debugger\n", line ? 1:2); 120 121 kgdb_enabled = 1; 122 /* Breakpoints and stuff are in sgi_irq_setup() */ 123 } 124 } 125 #endif 126 127 #if defined(CONFIG_VT) && defined(CONFIG_SGI_NEWPORT_CONSOLE) 128 { 129 ULONG *gfxinfo; 130 ULONG * (*__vec)(void) = (void *) (long) 131 *((_PULONG *)(long)((PROMBLOCK)->pvector + 0x20)); 132 133 gfxinfo = __vec(); 134 sgi_gfxaddr = ((gfxinfo[1] >= 0xa0000000 135 && gfxinfo[1] <= 0xc0000000) 136 ? gfxinfo[1] - 0xa0000000 : 0); 137 138 /* newport addresses? */ 139 if (sgi_gfxaddr == 0x1f0f0000 || sgi_gfxaddr == 0x1f4f0000) { 140 conswitchp = &newport_con; 141 } 142 } 143 #endif 144 } 145