Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/mips/sgi-ip32/ip32-setup.c
10818 views
1
/*

2
 * IP32 basic setup

3
 *

4
 * This file is subject to the terms and conditions of the GNU General Public

5
 * License.  See the file "COPYING" in the main directory of this archive

6
 * for more details.

7
 *

8
 * Copyright (C) 2000 Harald Koerfgen

9
 * Copyright (C) 2002, 2003, 2005 Ilya A. Volynets

10
 * Copyright (C) 2006 Ralf Baechle <[email protected]>

11
 */

12
#include <linux/console.h>

13
#include <linux/init.h>

14
#include <linux/interrupt.h>

15
#include <linux/mc146818rtc.h>

16
#include <linux/param.h>

17
#include <linux/sched.h>

18


19
#include <asm/bootinfo.h>

20
#include <asm/mc146818-time.h>

21
#include <asm/mipsregs.h>

22
#include <asm/mmu_context.h>

23
#include <asm/sgialib.h>

24
#include <asm/time.h>

25
#include <asm/traps.h>

26
#include <asm/io.h>

27
#include <asm/ip32/crime.h>

28
#include <asm/ip32/mace.h>

29
#include <asm/ip32/ip32_ints.h>

30


31
extern void ip32_be_init(void);

32
extern void crime_init(void);

33


34
#ifdef CONFIG_SGI_O2MACE_ETH

35
/*

36
 * This is taken care of in here 'cause they say using Arc later on is

37
 * problematic

38
 */

39
extern char o2meth_eaddr[8];

40
static inline unsigned char str2hexnum(unsigned char c)

41
{

42
	if (c >= '0' && c <= '9')

43
		return c - '0';

44
	if (c >= 'a' && c <= 'f')

45
		return c - 'a' + 10;

46
	return 0; /* foo */

47
}

48


49
static inline void str2eaddr(unsigned char *ea, unsigned char *str)

50
{

51
	int i;

52


53
	for (i = 0; i < 6; i++) {

54
		unsigned char num;

55


56
		if(*str == ':')

57
			str++;

58
		num = str2hexnum(*str++) << 4;

59
		num |= (str2hexnum(*str++));

60
		ea[i] = num;

61
	}

62
}

63
#endif

64


65
/* An arbitrary time; this can be decreased if reliability looks good */

66
#define WAIT_MS 10

67


68
void __init plat_time_init(void)

69
{

70
	printk(KERN_INFO "Calibrating system timer... ");

71
	write_c0_count(0);

72
	crime->timer = 0;

73
	while (crime->timer < CRIME_MASTER_FREQ * WAIT_MS / 1000) ;

74
	mips_hpt_frequency = read_c0_count() * 1000 / WAIT_MS;

75
	printk("%d MHz CPU detected\n", mips_hpt_frequency * 2 / 1000000);

76
}

77


78
void __init plat_mem_setup(void)

79
{

80
	board_be_init = ip32_be_init;

81


82
#ifdef CONFIG_SGI_O2MACE_ETH

83
	{

84
		char *mac = ArcGetEnvironmentVariable("eaddr");

85
		str2eaddr(o2meth_eaddr, mac);

86
	}

87
#endif

88


89
#if defined(CONFIG_SERIAL_CORE_CONSOLE)

90
	{

91
		char* con = ArcGetEnvironmentVariable("console");

92
		if (con && *con == 'd') {

93
			static char options[8] __initdata;

94
			char *baud = ArcGetEnvironmentVariable("dbaud");

95
			if (baud)

96
				strcpy(options, baud);

97
			add_preferred_console("ttyS", *(con + 1) == '2' ? 1 : 0,

98
					      baud ? options : NULL);

99
		}

100
	}

101
#endif

102
}

103


104