1 /* $NetBSD: cpu.h,v 1.72 2023/09/04 20:58:52 mrg Exp $ */ 2 3 /*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 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 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)cpu.h 5.4 (Berkeley) 5/9/91 35 */ 36 37 #ifndef _AMD64_CPU_H_ 38 #define _AMD64_CPU_H_ 39 40 #ifdef __x86_64__ 41 42 #include <x86/cpu.h> 43 44 #ifdef _KERNEL 45 46 #if defined(__GNUC__) && !defined(_MODULE) 47 48 static struct cpu_info *x86_curcpu(void); 49 static lwp_t *x86_curlwp(void); 50 51 /* 52 * XXXGCC12 has: 53 * ./machine/cpu.h:57:9: error: array subscript 0 is outside array bounds of 'struct cpu_info * const[0]' [-Werror=array-bounds] 54 * 56 | __asm("movq %%gs:%1, %0" : 55 */ 56 #pragma GCC push_options 57 #pragma GCC diagnostic ignored "-Warray-bounds" 58 59 __inline __always_inline static struct cpu_info * __unused __nomsan 60 x86_curcpu(void) 61 { 62 struct cpu_info *ci; 63 64 __asm("movq %%gs:%1, %0" : 65 "=r" (ci) : 66 "m" 67 (*(struct cpu_info * const *)offsetof(struct cpu_info, ci_self))); 68 return ci; 69 } 70 71 __inline static lwp_t * __unused __nomsan __attribute__ ((const)) 72 x86_curlwp(void) 73 { 74 lwp_t *l; 75 76 __asm("movq %%gs:%1, %0" : 77 "=r" (l) : 78 "m" 79 (*(struct cpu_info * const *)offsetof(struct cpu_info, ci_curlwp))); 80 return l; 81 } 82 83 #pragma GCC pop_options 84 85 #endif /* __GNUC__ && !_MODULE */ 86 87 #ifdef XENPV 88 #define CLKF_USERMODE(frame) (curcpu()->ci_xen_clockf_usermode) 89 #define CLKF_PC(frame) (curcpu()->ci_xen_clockf_pc) 90 #else /* XENPV */ 91 #define CLKF_USERMODE(frame) USERMODE((frame)->cf_if.if_tf.tf_cs) 92 #define CLKF_PC(frame) ((frame)->cf_if.if_tf.tf_rip) 93 #endif /* XENPV */ 94 #define CLKF_INTR(frame) (curcpu()->ci_idepth > 0) 95 #define LWP_PC(l) ((l)->l_md.md_regs->tf_rip) 96 97 void *cpu_uarea_alloc(bool); 98 bool cpu_uarea_free(void *); 99 100 #endif /* _KERNEL */ 101 102 #else /* __x86_64__ */ 103 104 #include <i386/cpu.h> 105 106 #endif /* __x86_64__ */ 107 108 #endif /* !_AMD64_CPU_H_ */ 109