1be0c05311
Introduce the basic ARM64 architecture support. A new CONFIG_ARM64 symbol is introduced for the new architecture and new cmake / Kconfig files are added to switch between ARM and ARM64. Signed-off-by: Carlo Caione <ccaione@baylibre.com>
62 lines
1.2 KiB
C
62 lines
1.2 KiB
C
/*
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* Copyright (c) 2019 Carlo Caione <ccaione@baylibre.com>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_INCLUDE_ARCH_ARM_AARCH64_TIMER_H_
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#define ZEPHYR_INCLUDE_ARCH_ARM_AARCH64_TIMER_H_
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#ifndef _ASMLANGUAGE
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#include <drivers/timer/arm_arch_timer.h>
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#include <zephyr/types.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define ARM_ARCH_TIMER_IRQ ((ARM_TIMER_VIRTUAL_IRQ + 1) << 8)
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#define CNTV_CTL_ENABLE ((1) << 0)
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static ALWAYS_INLINE void arm_arch_timer_set_compare(u64_t val)
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{
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__asm__ volatile("msr cntv_cval_el0, %0\n\t"
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: : "r" (val) : "memory");
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}
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static ALWAYS_INLINE void arm_arch_timer_enable(unsigned char enable)
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{
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u32_t cntv_ctl;
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__asm__ volatile("mrs %0, cntv_ctl_el0\n\t"
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: "=r" (cntv_ctl) : : "memory");
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if (enable)
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cntv_ctl |= CNTV_CTL_ENABLE;
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else
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cntv_ctl &= ~CNTV_CTL_ENABLE;
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__asm__ volatile("msr cntv_ctl_el0, %0\n\t"
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: : "r" (cntv_ctl) : "memory");
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}
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static ALWAYS_INLINE u64_t arm_arch_timer_count(void)
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{
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u64_t cntvct_el0;
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__asm__ volatile("mrs %0, cntvct_el0\n\t"
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: "=r" (cntvct_el0) : : "memory");
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return cntvct_el0;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* _ASMLANGUAGE */
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#endif /* ZEPHYR_INCLUDE_ARCH_ARM_AARCH64_TIMER_H_ */
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