1 /* $NetBSD: locore.h,v 1.5 2018/07/09 09:09:47 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _AARCH64_LOCORE_H_ 33 #define _AARCH64_LOCORE_H_ 34 35 #ifdef __aarch64__ 36 37 #ifdef _KERNEL_OPT 38 #include "opt_multiprocessor.h" 39 #endif 40 41 #ifdef _LOCORE 42 43 #define ENABLE_INTERRUPT \ 44 msr daifclr, #((DAIF_I|DAIF_F) >> DAIF_SETCLR_SHIFT) 45 #define DISABLE_INTERRUPT \ 46 msr daifset, #((DAIF_I|DAIF_F) >> DAIF_SETCLR_SHIFT) 47 48 #else /* _LOCORE */ 49 50 #include <sys/types.h> 51 52 #include <aarch64/armreg.h> 53 #include <aarch64/machdep.h> /* arm32 compat */ 54 55 /* for compatibility arch/arm */ 56 #define I32_bit DAIF_I 57 #define F32_bit DAIF_F 58 #define cpsie(psw) daif_enable((psw)) 59 #define cpsid(psw) daif_disable((psw)) 60 61 62 #define ENABLE_INTERRUPT() daif_enable(DAIF_I|DAIF_F) 63 #define DISABLE_INTERRUPT() daif_disable(DAIF_I|DAIF_F) 64 65 #define DAIF_MASK (DAIF_D|DAIF_A|DAIF_I|DAIF_F) 66 67 static inline void __unused 68 daif_enable(register_t psw) 69 { 70 if (!__builtin_constant_p(psw)) { 71 reg_daif_write(reg_daif_read() & ~psw); 72 } else { 73 reg_daifclr_write((psw & DAIF_MASK) >> DAIF_SETCLR_SHIFT); 74 } 75 } 76 77 static inline register_t __unused 78 daif_disable(register_t psw) 79 { 80 register_t oldpsw = reg_daif_read(); 81 if (!__builtin_constant_p(psw)) { 82 reg_daif_write(oldpsw | psw); 83 } else { 84 reg_daifset_write((psw & DAIF_MASK) >> DAIF_SETCLR_SHIFT); 85 } 86 return oldpsw; 87 } 88 89 static inline void 90 arm_dsb(void) 91 { 92 __asm __volatile("dsb sy" ::: "memory"); 93 } 94 95 static inline void 96 arm_isb(void) 97 { 98 __asm __volatile("isb" ::: "memory"); 99 } 100 101 #endif /* _LOCORE */ 102 103 #elif defined(__arm__) 104 105 #include <arm/locore.h> 106 107 #endif /* __aarch64__/__arm__ */ 108 109 #endif /* _AARCH64_LOCORE_H_ */ 110