1 /* 2 * Copyright (c) 2015-2020 François Tigeot <ftigeot@wolfpond.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef _LINUX_IRQFLAGS_H_ 28 #define _LINUX_IRQFLAGS_H_ 29 30 #include <linux/typecheck.h> 31 32 #if 0 33 /* 34 * local_irq_disable/enable functions prevent interrupts to run on the 35 * current CPU in critical sections of code. 36 * This maps nicely to crit_enter/exit sequences in the DragonFly kernel 37 */ 38 #define local_irq_disable() crit_enter() 39 #define local_irq_enable() crit_exit() 40 #endif 41 42 static inline void 43 local_irq_disable(void) 44 { 45 __asm __volatile("cli": : :"memory"); 46 } 47 48 static inline void 49 local_irq_enable(void) 50 { 51 __asm __volatile("sti": : :"memory"); 52 } 53 54 static inline bool 55 irqs_disabled(void) 56 { 57 return !(read_rflags() & 0x200UL); 58 } 59 60 #endif /* _LINUX_IRQFLAGS_H_ */ 61