1 /* 2 * Copyright 2018, Jaroslaw Pelczar <jarek@jpelczar.com> 3 * Distributed under the terms of the MIT License. 4 */ 5 #ifndef _KERNEL_ARCH_ARM64_ARCH_INT_H_ 6 #define _KERNEL_ARCH_ARM64_ARCH_INT_H_ 7 8 9 #include <SupportDefs.h> 10 #include <kernel/arch/arm64/arm_registers.h> 11 12 13 #define NUM_IO_VECTORS 1024 14 15 static inline void 16 arch_int_enable_interrupts_inline(void) 17 { 18 asm volatile("msr daifclr, #0xf" : : : "memory"); 19 } 20 21 22 static inline int 23 arch_int_disable_interrupts_inline(void) 24 { 25 uint32 flags; 26 27 asm volatile("mrs %0, daif\n" "msr daifset, #0xf" : "=r"(flags) : : "memory"); 28 29 return flags; 30 } 31 32 33 static inline void 34 arch_int_restore_interrupts_inline(int oldState) 35 { 36 asm volatile("msr daif, %0" : : "r"(oldState) : "memory"); 37 } 38 39 40 static inline bool 41 arch_int_are_interrupts_enabled_inline(void) 42 { 43 return (READ_SPECIALREG(DAIF) & PSR_I) == 0; 44 } 45 46 47 // map the functions to the inline versions 48 #define arch_int_enable_interrupts() arch_int_enable_interrupts_inline() 49 #define arch_int_disable_interrupts() arch_int_disable_interrupts_inline() 50 #define arch_int_restore_interrupts(status) \ 51 arch_int_restore_interrupts_inline(status) 52 #define arch_int_are_interrupts_enabled() \ 53 arch_int_are_interrupts_enabled_inline() 54 55 56 #endif /* _KERNEL_ARCH_ARM64_ARCH_INT_H_ */ 57