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aiot
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efHeterogeneousSynchronization
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externalConnectionMonitoring
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commandProcessing.c

commandProcessing.c 1.3 KB
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  1. /*
    2. 

  2.  *  linux/arch/arm/kernel/arch_timer.c
    3. 

  3.  *
    4. 

  4.  *  Copyright (C) 2011 ARM Ltd.
    5. 

  5.  *  All Rights Reserved
    6. 

  6.  *
    7. 

  7.  * This program is free software; you can redistribute it and/or modify
    8. 

  8.  * it under the terms of the GNU General Public License version 2 as
    9. 

  9.  * published by the Free Software Foundation.
    10. 

  10.  */
    11. 

  11. #include <linux/init.h>
    12. 

  12. #include <linux/kernel.h>
    13. 

  13. #include <linux/delay.h>
    14. 

  14. #include <linux/device.h>
    15. 

  15. #include <linux/smp.h>
    16. 

  16. #include <linux/cpu.h>
    17. 

  17. #include <linux/jiffies.h>
    18. 

  18. #include <linux/clockchips.h>
    19. 

  19. #include <linux/interrupt.h>
    20. 

  20. #include <linux/of_irq.h>
    21. 

  21. #include <linux/io.h>
    22. 

  22. 

  23. #include <asm/cputype.h>
    24. 

  24. #include <asm/delay.h>
    25. 

  25. #include <asm/localtimer.h>
    26. 

  26. #include <asm/arch_timer.h>
    27. 

  27. #include <asm/system_info.h>
    28. 

  28. #include <asm/sched_clock.h>
    29. 

  29. 

  30. static unsigned long arch_timer_rate;
    31. 

  31. 

  32. enum ppi_nr {
    33. 

  33. 	PHYS_SECURE_PPI,
    34. 

  34. 	PHYS_NONSECURE_PPI,
    35. 

  35. 	VIRT_PPI,
    36. 

  36. 	HYP_PPI,
    37. 

  37. 	MAX_TIMER_PPI
    38. 

  38. };
    39. 

  39. 

  40. static int arch_timer_ppi[MAX_TIMER_PPI];
    41. 

  41. 

  42. static struct clock_event_device __percpu **arch_timer_evt;
    43. 

  43. static struct delay_timer arch_delay_timer;
    44. 

  44. 

  45. static bool arch_timer_use_virtual = true;
    46. 

  46. 

  47. /*
    48. 

  48.  * Architected system timer support.
    49. 

  49.  */
    50. 

  50. 

  51. #define ARCH_TIMER_CTRL_ENABLE		(1 << 0)
    52. 

  52. #define ARCH_TIMER_CTRL_IT_MASK		(1 << 1)
    53. 

  53. #define ARCH_TIMER_CTRL_IT_STAT		(1 << 2)
    54. 

  54. 

  55. #define ARCH_TIMER_REG_CTRL		0
    56. 

  56. #define ARCH_TIMER_REG_FREQ		1
    57.