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
29extern void ip22_be_init(void) __init;
30
31void __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