Line data    Source code

       1            0 : /*
       2              :  * Copyright (c) 2019 Carlo Caione <ccaione@baylibre.com>
       3              :  *
       4              :  * SPDX-License-Identifier: Apache-2.0
       5              :  */
       6              : 
       7              : #ifndef ZEPHYR_INCLUDE_ARCH_ARM64_TIMER_H_
       8              : #define ZEPHYR_INCLUDE_ARCH_ARM64_TIMER_H_
       9              : 
      10              : #ifndef _ASMLANGUAGE
      11              : 
      12              : #include <limits.h>
      13              : 
      14              : #include <zephyr/drivers/timer/arm_arch_timer.h>
      15              : #include <zephyr/types.h>
      16              : #include <limits.h>
      17              : 
      18              : #ifdef __cplusplus
      19              : extern "C" {
      20              : #endif
      21              : 
      22            0 : #define ARM_ARCH_TIMER_IRQ      ARM_TIMER_VIRTUAL_IRQ
      23            0 : #define ARM_ARCH_TIMER_PRIO     ARM_TIMER_VIRTUAL_PRIO
      24            0 : #define ARM_ARCH_TIMER_FLAGS    ARM_TIMER_VIRTUAL_FLAGS
      25              : 
      26            0 : static ALWAYS_INLINE void arm_arch_timer_init(void)
      27              : {
      28              : #ifdef CONFIG_TIMER_READS_ITS_FREQUENCY_AT_RUNTIME
      29              :         extern unsigned int z_clock_hw_cycles_per_sec;
      30              :         uint64_t cntfrq_el0 = read_cntfrq_el0();
      31              : 
      32              :         __ASSERT(cntfrq_el0 < UINT_MAX, "cntfrq_el0 cannot fit in system 'unsigned int'");
      33              :         z_clock_hw_cycles_per_sec = (unsigned int) cntfrq_el0;
      34              : #endif
      35              : }
      36              : 
      37            0 : static ALWAYS_INLINE void arm_arch_timer_set_compare(uint64_t val)
      38              : {
      39              :         write_cntv_cval_el0(val);
      40              : }
      41              : 
      42            0 : static ALWAYS_INLINE void arm_arch_timer_enable(unsigned char enable)
      43              : {
      44              :         uint64_t cntv_ctl;
      45              : 
      46              :         cntv_ctl = read_cntv_ctl_el0();
      47              : 
      48              :         if (enable) {
      49              :                 cntv_ctl |= CNTV_CTL_ENABLE_BIT;
      50              :         } else {
      51              :                 cntv_ctl &= ~CNTV_CTL_ENABLE_BIT;
      52              :         }
      53              : 
      54              :         write_cntv_ctl_el0(cntv_ctl);
      55              : }
      56              : 
      57            0 : static ALWAYS_INLINE void arm_arch_timer_set_irq_mask(bool mask)
      58              : {
      59              :         uint64_t cntv_ctl;
      60              : 
      61              :         cntv_ctl = read_cntv_ctl_el0();
      62              : 
      63              :         if (mask) {
      64              :                 cntv_ctl |= CNTV_CTL_IMASK_BIT;
      65              :         } else {
      66              :                 cntv_ctl &= ~CNTV_CTL_IMASK_BIT;
      67              :         }
      68              : 
      69              :         write_cntv_ctl_el0(cntv_ctl);
      70              : }
      71              : 
      72            0 : static ALWAYS_INLINE uint64_t arm_arch_timer_count(void)
      73              : {
      74              :         return read_cntvct_el0();
      75              : }
      76              : 
      77              : #ifdef __cplusplus
      78              : }
      79              : #endif
      80              : 
      81              : #endif /* _ASMLANGUAGE */
      82              : 
      83              : #endif /* ZEPHYR_INCLUDE_ARCH_ARM64_TIMER_H_ */