1 /* 2 * Copyright (c) 2013-2014 Wind River Systems, Inc. 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 /** 8 * @file 9 * @brief ARM AArch32 public kernel miscellaneous 10 * 11 * ARM AArch32-specific kernel miscellaneous interface. Included by arm/arch.h. 12 */ 13 14 #ifndef ZEPHYR_INCLUDE_ARCH_ARM_MISC_H_ 15 #define ZEPHYR_INCLUDE_ARCH_ARM_MISC_H_ 16 17 #ifdef __cplusplus 18 extern "C" { 19 #endif 20 21 #ifndef _ASMLANGUAGE 22 extern uint32_t sys_clock_cycle_get_32(void); 23 arch_k_cycle_get_32(void)24static inline uint32_t arch_k_cycle_get_32(void) 25 { 26 return sys_clock_cycle_get_32(); 27 } 28 29 extern uint64_t sys_clock_cycle_get_64(void); 30 arch_k_cycle_get_64(void)31static inline uint64_t arch_k_cycle_get_64(void) 32 { 33 return sys_clock_cycle_get_64(); 34 } 35 arch_nop(void)36static ALWAYS_INLINE void arch_nop(void) 37 { 38 __asm__ volatile("nop"); 39 } 40 41 #if defined(CONFIG_USERSPACE) 42 extern bool z_arm_thread_is_in_user_mode(void); 43 #endif 44 45 #if defined(CONFIG_ARM_ON_ENTER_CPU_IDLE_HOOK) 46 /* Prototype of a hook that can be enabled to be called every time the CPU is 47 * made idle (the calls will be done from k_cpu_idle() and k_cpu_atomic_idle()). 48 * If this hook returns false, the CPU is prevented from entering the actual 49 * sleep (the WFE/WFI instruction is skipped). 50 */ 51 bool z_arm_on_enter_cpu_idle(void); 52 #endif 53 54 #if defined(CONFIG_ARM_ON_ENTER_CPU_IDLE_PREPARE_HOOK) 55 /* Prototype of a hook that can be enabled to be called every time the CPU is 56 * made idle (the calls will be done from k_cpu_idle() and k_cpu_atomic_idle()). 57 * The function is called before interrupts are disabled and can prepare to 58 * upcoming call to z_arm_on_enter_cpu_idle. 59 */ 60 void z_arm_on_enter_cpu_idle_prepare(void); 61 #endif 62 63 #endif 64 65 #ifdef __cplusplus 66 } 67 #endif 68 69 #endif /* ZEPHYR_INCLUDE_ARCH_ARM_MISC_H_ */ 70
