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/string.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/io.h>
24#include <asm/traps.h>
25#include <asm/sgialib.h>
26#include <asm/sgi/mc.h>
27#include <asm/sgi/hpc3.h>
28#include <asm/sgi/ip22.h>
29
30void __init plat_mem_setup(void)
31{
32	char *ctype;
33	char *cserial;
34
35	board_be_init = ip22_be_init;
36
37	/* Init the INDY HPC I/O controller.  Need to call this before
38	 * fucking with the memory controller because it needs to know the
39	 * boardID and whether this is a Guiness or a FullHouse machine.
40	 */
41	sgihpc_init();
42
43	/* Init INDY memory controller. */
44	sgimc_init();
45
46#ifdef CONFIG_BOARD_SCACHE
47	/* Now enable boardcaches, if any. */
48	indy_sc_init();
49#endif
50
51	/* Set EISA IO port base for Indigo2
52	 * ioremap cannot fail */
53	set_io_port_base((unsigned long)ioremap(0x00080000,
54						0x1fffffff - 0x00080000));
55	/* ARCS console environment variable is set to "g?" for
56	 * graphics console, it is set to "d" for the first serial
57	 * line and "d2" for the second serial line.
58	 *
59	 * Need to check if the case is 'g' but no keyboard:
60	 * (ConsoleIn/Out = serial)
61	 */
62	ctype = ArcGetEnvironmentVariable("console");
63	cserial = ArcGetEnvironmentVariable("ConsoleOut");
64
65	if ((ctype && *ctype == 'd') || (cserial && *cserial == 's')) {
66		static char options[8] __initdata;
67		char *baud = ArcGetEnvironmentVariable("dbaud");
68		if (baud)
69			strscpy(options, baud);
70		add_preferred_console("ttyS", *(ctype + 1) == '2' ? 1 : 0,
71				      baud ? options : NULL);
72	} else if (!ctype || *ctype != 'g') {
73		/* Use ARC if we don't want serial ('d') or graphics ('g'). */
74		prom_flags |= PROM_FLAG_USE_AS_CONSOLE;
75		add_preferred_console("arc", 0, NULL);
76	}
77}