1/*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * from: FreeBSD: src/sys/i386/include/globaldata.h,v 1.27 2001/04/27 29 * $FreeBSD$ 30 */ 31 32#ifndef _MACHINE_PCPU_H_ 33#define _MACHINE_PCPU_H_ 34 35#include <machine/asmacros.h> 36#include <machine/cache.h> 37#include <machine/frame.h> 38#include <machine/intr_machdep.h> 39 40#define ALT_STACK_SIZE 128 41 42struct pmap; 43 44/* 45 * Inside the kernel, the globally reserved register g7 is used to 46 * point at the globaldata structure. 47 */ 48#define PCPU_MD_FIELDS \ 49 struct cacheinfo pc_cache; \ 50 struct intr_request pc_irpool[IR_FREE]; \ 51 struct intr_request *pc_irhead; \ 52 struct intr_request **pc_irtail; \ 53 struct intr_request *pc_irfree; \ 54 struct pmap *pc_pmap; \ 55 vm_offset_t pc_addr; \ 56 vm_offset_t pc_qmap_addr; \ 57 u_long pc_tickref; \ 58 u_long pc_tickadj; \ 59 u_long pc_tickincrement; \ 60 u_int pc_clock; \ 61 u_int pc_impl; \ 62 u_int pc_mid; \ 63 u_int pc_node; \ 64 u_int pc_tlb_ctx; \ 65 u_int pc_tlb_ctx_max; \ 66 u_int pc_tlb_ctx_min; \ 67 char __pad[653] 68 69#ifdef _KERNEL 70 71extern void *dpcpu0; 72 73struct pcb; 74struct pcpu; 75 76register struct pcb *curpcb __asm__(__XSTRING(PCB_REG)); 77register struct pcpu *pcpup __asm__(__XSTRING(PCPU_REG)); 78 79#define get_pcpu() (pcpup) 80#define PCPU_GET(member) (pcpup->pc_ ## member) 81 82static __inline __pure2 struct thread * 83__curthread(void) 84{ 85 struct thread *td; 86 87 __asm("ldx [%" __XSTRING(PCPU_REG) "], %0" : "=r" (td)); 88 return (td); 89} 90#define curthread (__curthread()) 91 92/* 93 * XXX The implementation of this operation should be made atomic 94 * with respect to preemption. 95 */ 96#define PCPU_ADD(member, value) (pcpup->pc_ ## member += (value)) 97#define PCPU_INC(member) PCPU_ADD(member, 1) 98#define PCPU_PTR(member) (&pcpup->pc_ ## member) 99#define PCPU_SET(member,value) (pcpup->pc_ ## member = (value)) 100 101#endif /* _KERNEL */ 102 103#endif /* !_MACHINE_PCPU_H_ */ 104