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39 lines
746 B
39 lines
746 B
/* |
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* Copyright (c) 2017 Synopsys, Inc. |
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* |
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* SPDX-License-Identifier: Apache-2.0 |
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*/ |
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/** |
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* @file |
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* @brief Time Stamp API for ARCv2 |
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* |
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* Provide 64-bit time stamp API |
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*/ |
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#include <zephyr/kernel.h> |
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#include <zephyr/toolchain.h> |
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#include <zephyr/kernel_structs.h> |
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/* |
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* @brief Read 64-bit timestamp value |
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* |
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* This function returns a 64-bit bit time stamp value that is clocked |
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* at the same frequency as the CPU. |
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* |
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* @return 64-bit time stamp value |
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*/ |
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uint64_t z_tsc_read(void) |
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{ |
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unsigned int key; |
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uint64_t t; |
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uint32_t count; |
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key = arch_irq_lock(); |
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t = (uint64_t)sys_clock_tick_get(); |
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count = z_arc_v2_aux_reg_read(_ARC_V2_TMR0_COUNT); |
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arch_irq_unlock(key); |
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t *= k_ticks_to_cyc_floor64(1); |
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t += (uint64_t)count; |
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return t; |
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}
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