Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/mips/sgi-ip22/ip22-setup.c
26424 views
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 ([email protected])

6
 * Copyright (C) 1997, 1998 Ralf Baechle ([email protected])

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
void __init plat_mem_setup(void)

30
{

31
	char *ctype;

32
	char *cserial;

33


34
	board_be_init = ip22_be_init;

35


36
	/* Init the INDY HPC I/O controller.  Need to call this before

37
	 * fucking with the memory controller because it needs to know the

38
	 * boardID and whether this is a Guiness or a FullHouse machine.

39
	 */

40
	sgihpc_init();

41


42
	/* Init INDY memory controller. */

43
	sgimc_init();

44


45
#ifdef CONFIG_BOARD_SCACHE

46
	/* Now enable boardcaches, if any. */

47
	indy_sc_init();

48
#endif

49


50
	/* Set EISA IO port base for Indigo2

51
	 * ioremap cannot fail */

52
	set_io_port_base((unsigned long)ioremap(0x00080000,

53
						0x1fffffff - 0x00080000));

54
	/* ARCS console environment variable is set to "g?" for

55
	 * graphics console, it is set to "d" for the first serial

56
	 * line and "d2" for the second serial line.

57
	 *

58
	 * Need to check if the case is 'g' but no keyboard:

59
	 * (ConsoleIn/Out = serial)

60
	 */

61
	ctype = ArcGetEnvironmentVariable("console");

62
	cserial = ArcGetEnvironmentVariable("ConsoleOut");

63


64
	if ((ctype && *ctype == 'd') || (cserial && *cserial == 's')) {

65
		static char options[8] __initdata;

66
		char *baud = ArcGetEnvironmentVariable("dbaud");

67
		if (baud)

68
			strcpy(options, baud);

69
		add_preferred_console("ttyS", *(ctype + 1) == '2' ? 1 : 0,

70
				      baud ? options : NULL);

71
	} else if (!ctype || *ctype != 'g') {

72
		/* Use ARC if we don't want serial ('d') or graphics ('g'). */

73
		prom_flags |= PROM_FLAG_USE_AS_CONSOLE;

74
		add_preferred_console("arc", 0, NULL);

75
	}

76
}

77


78