Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/x86/include/asm/apb_timer.h
10821 views
1
/*

2
 * apb_timer.h: Driver for Langwell APB timer based on Synopsis DesignWare

3
 *

4
 * (C) Copyright 2009 Intel Corporation

5
 * Author: Jacob Pan ([email protected])

6
 *

7
 * This program is free software; you can redistribute it and/or

8
 * modify it under the terms of the GNU General Public License

9
 * as published by the Free Software Foundation; version 2

10
 * of the License.

11
 *

12
 * Note:

13
 */

14


15
#ifndef ASM_X86_APBT_H

16
#define ASM_X86_APBT_H

17
#include <linux/sfi.h>

18


19
#ifdef CONFIG_APB_TIMER

20


21
/* Langwell DW APB timer registers */

22
#define APBTMR_N_LOAD_COUNT    0x00

23
#define APBTMR_N_CURRENT_VALUE 0x04

24
#define APBTMR_N_CONTROL       0x08

25
#define APBTMR_N_EOI           0x0c

26
#define APBTMR_N_INT_STATUS    0x10

27


28
#define APBTMRS_INT_STATUS     0xa0

29
#define APBTMRS_EOI            0xa4

30
#define APBTMRS_RAW_INT_STATUS 0xa8

31
#define APBTMRS_COMP_VERSION   0xac

32
#define APBTMRS_REG_SIZE       0x14

33


34
/* register bits */

35
#define APBTMR_CONTROL_ENABLE  (1<<0)

36
#define APBTMR_CONTROL_MODE_PERIODIC   (1<<1) /*1: periodic 0:free running */

37
#define APBTMR_CONTROL_INT     (1<<2)

38


39
/* default memory mapped register base */

40
#define LNW_SCU_ADDR           0xFF100000

41
#define LNW_EXT_TIMER_OFFSET   0x1B800

42
#define APBT_DEFAULT_BASE      (LNW_SCU_ADDR+LNW_EXT_TIMER_OFFSET)

43
#define LNW_EXT_TIMER_PGOFFSET         0x800

44


45
/* APBT clock speed range from PCLK to fabric base, 25-100MHz */

46
#define APBT_MAX_FREQ          50

47
#define APBT_MIN_FREQ          1

48
#define APBT_MMAP_SIZE         1024

49


50
#define APBT_DEV_USED  1

51


52
extern void apbt_time_init(void);

53
extern struct clock_event_device *global_clock_event;

54
extern unsigned long apbt_quick_calibrate(void);

55
extern int arch_setup_apbt_irqs(int irq, int trigger, int mask, int cpu);

56
extern void apbt_setup_secondary_clock(void);

57


58
extern struct sfi_timer_table_entry *sfi_get_mtmr(int hint);

59
extern void sfi_free_mtmr(struct sfi_timer_table_entry *mtmr);

60
extern int sfi_mtimer_num;

61


62
#else /* CONFIG_APB_TIMER */

63


64
static inline unsigned long apbt_quick_calibrate(void) {return 0; }

65
static inline void apbt_time_init(void) { }

66


67
#endif

68
#endif /* ASM_X86_APBT_H */

69


70