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[/] [or1k_old/] [trunk/] [rc203soc/] [sw/] [uClinux/] [include/] [asm-armnommu/] [arch-ebsa110/] [time.h] - Blame information for rev 1765

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/*
 * linux/include/asm-arm/arch-a5k/time.h
 *
 * Copyright (c) 1996 Russell King.
 *
 * No real time clock on the evaluation board!
 *
 * Changelog:
 *  10-Oct-1996 RMK     Created
 *  04-Dec-1997 RMK     Updated for new arch/arm/time.c
 */
 
#define MCLK_47_8
 
#if defined(MCLK_42_3)
#define PIT1_COUNT 0xecbe
#elif defined(MCLK_47_8)
/*
 * This should be 0x10AE1, but that doesn't exactly fit.
 * We run the timer interrupt at 5ms, and then divide it by
 * two in software...  This is so that the user processes
 * see exactly the same model whichever ARM processor they're
 * running on.
 */
#define PIT1_COUNT 0x85b8
#define DIVISOR 2
#endif
 
extern __inline__ unsigned long gettimeoffset (void)
{
        return 0;
}
 
#ifndef DIVISOR
extern __inline__ int reset_timer (void)
{
        *PIT_T1 = (PIT1_COUNT) & 0xff;
        *PIT_T1 = (PIT1_COUNT) >> 8;
        return 1;
}
#else
extern __inline__ int reset_timer (void)
{
        static unsigned int divisor;
        static int count = 50;
 
        *PIT_T1 = (PIT1_COUNT) & 0xff;
        *PIT_T1 = (PIT1_COUNT) >> 8;
 
        if (--count == 0) {
                count = 50;
                *(volatile unsigned char *)0xf2400000 ^= 128;
        }
 
        if (divisor == 0) {
                divisor = DIVISOR - 1;
                return 1;
        }
        divisor -= 1;
        return 0;
}
#endif
 
/*
 * We don't have a RTC to update!
 */
#define update_rtc()
 
/*
 * Set up timer interrupt, and return the current time in seconds.
 */
extern __inline__ unsigned long setup_timer (void)
{
        /*
         * Timer 1, mode 0, 16-bit, autoreload
         */
        *PIT_CTRL = 0x70;
        /*
         * Refresh counter clocked at 47.8MHz/7 = 146.4ns
         * We want centi-second interrupts
         */
        reset_timer ();
        /*
         * Default the date to 1 Jan 1970 0:0:0
         * You will have to run a time daemon to set the
         * clock correctly at bootup
         */
        return mktime(1970, 1, 1, 0, 0, 0);
}

Line No.	Rev	Author	Line
1	1633	jcastillo	`/*`
2			`* linux/include/asm-arm/arch-a5k/time.h`
3			`*`
4			`* Copyright (c) 1996 Russell King.`
5			`*`
6			`* No real time clock on the evaluation board!`
7			`*`
8			`* Changelog:`
9			`* 10-Oct-1996 RMK Created`
10			`* 04-Dec-1997 RMK Updated for new arch/arm/time.c`
11			`*/`
12
13			`#define MCLK_47_8`
14
15			`#if defined(MCLK_42_3)`
16			`#define PIT1_COUNT 0xecbe`
17			`#elif defined(MCLK_47_8)`
18			`/*`
19			`* This should be 0x10AE1, but that doesn't exactly fit.`
20			`* We run the timer interrupt at 5ms, and then divide it by`
21			`* two in software... This is so that the user processes`
22			`* see exactly the same model whichever ARM processor they're`
23			`* running on.`
24			`*/`
25			`#define PIT1_COUNT 0x85b8`
26			`#define DIVISOR 2`
27			`#endif`
28
29			`extern __inline__ unsigned long gettimeoffset (void)`
30			`{`
31			`return 0;`
32			`}`
33
34			`#ifndef DIVISOR`
35			`extern __inline__ int reset_timer (void)`
36			`{`
37			`*PIT_T1 = (PIT1_COUNT) & 0xff;`
38			`*PIT_T1 = (PIT1_COUNT) >> 8;`
39			`return 1;`
40			`}`
41			`#else`
42			`extern __inline__ int reset_timer (void)`
43			`{`
44			`static unsigned int divisor;`
45			`static int count = 50;`
46
47			`*PIT_T1 = (PIT1_COUNT) & 0xff;`
48			`*PIT_T1 = (PIT1_COUNT) >> 8;`
49
50			`if (--count == 0) {`
51			`count = 50;`
52			`(volatile unsigned char )0xf2400000 ^= 128;`
53			`}`
54
55			`if (divisor == 0) {`
56			`divisor = DIVISOR - 1;`
57			`return 1;`
58			`}`
59			`divisor -= 1;`
60			`return 0;`
61			`}`
62			`#endif`
63
64			`/*`
65			`* We don't have a RTC to update!`
66			`*/`
67			`#define update_rtc()`
68
69			`/*`
70			`* Set up timer interrupt, and return the current time in seconds.`
71			`*/`
72			`extern __inline__ unsigned long setup_timer (void)`
73			`{`
74			`/*`
75			`* Timer 1, mode 0, 16-bit, autoreload`
76			`*/`
77			`*PIT_CTRL = 0x70;`
78			`/*`
79			`* Refresh counter clocked at 47.8MHz/7 = 146.4ns`
80			`* We want centi-second interrupts`
81			`*/`
82			`reset_timer ();`
83			`/*`
84			`* Default the date to 1 Jan 1970 0:0:0`
85			`* You will have to run a time daemon to set the`
86			`* clock correctly at bootup`
87			`*/`
88			`return mktime(1970, 1, 1, 0, 0, 0);`
89			`}`

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[/] [or1k_old/] [trunk/] [rc203soc/] [sw/] [uClinux/] [include/] [asm-armnommu/] [arch-ebsa110/] [time.h] - Blame information for rev 1765