1 /* 2 * Copyright (c) 2018 Lexmark International, Inc. 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 /** 8 * @file 9 * @brief Exception/interrupt context helpers for Cortex-A and Cortex-R CPUs 10 * 11 * Exception/interrupt context helpers. 12 */ 13 14 #ifndef ZEPHYR_ARCH_ARM_INCLUDE_CORTEX_A_R_EXCEPTION_H_ 15 #define ZEPHYR_ARCH_ARM_INCLUDE_CORTEX_A_R_EXCEPTION_H_ 16 17 #include <zephyr/arch/cpu.h> 18 19 #ifdef _ASMLANGUAGE 20 21 /* nothing */ 22 23 #else 24 25 #include <zephyr/irq_offload.h> 26 27 #ifdef __cplusplus 28 extern "C" { 29 #endif 30 31 #ifdef CONFIG_IRQ_OFFLOAD 32 extern volatile irq_offload_routine_t offload_routine; 33 #endif 34 35 /* Check the CPSR mode bits to see if we are in IRQ or FIQ mode */ arch_is_in_isr(void)36static ALWAYS_INLINE bool arch_is_in_isr(void) 37 { 38 return (arch_curr_cpu()->nested != 0U); 39 } 40 arch_is_in_nested_exception(const struct arch_esf * esf)41static ALWAYS_INLINE bool arch_is_in_nested_exception(const struct arch_esf *esf) 42 { 43 return (arch_curr_cpu()->arch.exc_depth > 1U) ? (true) : (false); 44 } 45 46 #if defined(CONFIG_USERSPACE) 47 /* 48 * This function is used by privileged code to determine if the thread 49 * associated with the stack frame is in user mode. 50 */ z_arm_preempted_thread_in_user_mode(const struct arch_esf * esf)51static ALWAYS_INLINE bool z_arm_preempted_thread_in_user_mode(const struct arch_esf *esf) 52 { 53 return ((esf->basic.xpsr & CPSR_M_Msk) == CPSR_M_USR); 54 } 55 #endif 56 57 #ifndef CONFIG_USE_SWITCH 58 extern void z_arm_cortex_r_svc(void); 59 #endif 60 61 #ifdef __cplusplus 62 } 63 #endif 64 65 #endif /* _ASMLANGUAGE */ 66 67 #endif /* ZEPHYR_ARCH_ARM_INCLUDE_CORTEX_A_R_EXCEPTION_H_ */ 68
