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 extern void ip22_be_init(void) __init; 30 31 void __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