drivers/misc/mediatek/gpu/mt8127/mali/mali/timestamp-arm11-cc/mali_timestamp.h

   1 /*
   2  * This confidential and proprietary software may be used only as
   3  * authorised by a licensing agreement from ARM Limited
   4  * (C) COPYRIGHT 2010-2011, 2013 ARM Limited
   5  * ALL RIGHTS RESERVED
   6  * The entire notice above must be reproduced on all authorised
   7  * copies and copies may only be made to the extent permitted
   8  * by a licensing agreement from ARM Limited.
   9  */
  10
  11 #ifndef __MALI_TIMESTAMP_H__
  12 #define __MALI_TIMESTAMP_H__
  13
  14 #include "mali_osk.h"
  15
  16 MALI_STATIC_INLINE _mali_osk_errcode_t _mali_timestamp_reset(void)
  17 {
  18         /*
  19          * reset counters and overflow flags
  20          */
  21
  22         u32 mask = (1 << 0) | /* enable all three counters */
  23                    (0 << 1) | /* reset both Count Registers to 0x0 */
  24                    (1 << 2) | /* reset the Cycle Counter Register to 0x0 */
  25                    (0 << 3) | /* 1 = Cycle Counter Register counts every 64th processor clock cycle */
  26                    (0 << 4) | /* Count Register 0 interrupt enable */
  27                    (0 << 5) | /* Count Register 1 interrupt enable */
  28                    (0 << 6) | /* Cycle Counter interrupt enable */
  29                    (0 << 8) | /* Count Register 0 overflow flag (clear or write, flag on read) */
  30                    (0 << 9) | /* Count Register 1 overflow flag (clear or write, flag on read) */
  31                    (1 << 10); /* Cycle Counter Register overflow flag (clear or write, flag on read) */
  32
  33         __asm__ __volatile__ ("MCR    p15, 0, %0, c15, c12, 0" : : "r" (mask) );
  34
  35         return _MALI_OSK_ERR_OK;
  36 }
  37
  38 MALI_STATIC_INLINE u64 _mali_timestamp_get(void)
  39 {
  40         u32 result;
  41
  42         /* this is for the clock cycles */
  43         __asm__ __volatile__ ("MRC    p15, 0, %0, c15, c12, 1" : "=r" (result));
  44
  45         return (u64)result;
  46 }
  47
  48 #endif /* __MALI_TIMESTAMP_H__ */