1/*- 2 * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.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, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * from: FreeBSD: src/sys/i386/include/globaldata.h,v 1.27 2001/04/27 27 * $FreeBSD$ 28 */ 29 30#ifndef _MACHINE_PCPU_H_ 31#define _MACHINE_PCPU_H_ 32 33#include <machine/asmacros.h> 34#include <machine/cache.h> 35#include <machine/frame.h> 36#include <machine/intr_machdep.h> 37 38#define ALT_STACK_SIZE 128 39 40struct pmap; 41 42/* 43 * Inside the kernel, the globally reserved register g7 is used to 44 * point at the globaldata structure. 45 */ 46#define PCPU_MD_FIELDS \ 47 struct cacheinfo pc_cache; \ 48 struct intr_request pc_irpool[IR_FREE]; \ 49 struct intr_request *pc_irhead; \ 50 struct intr_request **pc_irtail; \ 51 struct intr_request *pc_irfree; \ 52 struct pmap *pc_pmap; \ 53 vm_offset_t pc_addr; \ 54 u_long pc_tickref; \ 55 u_long pc_tickadj; \ 56 u_long pc_tickincrement; \ 57 u_int pc_clock; \ 58 u_int pc_impl; \ 59 u_int pc_mid; \ 60 u_int pc_node; \ 61 u_int pc_tlb_ctx; \ 62 u_int pc_tlb_ctx_max; \ 63 u_int pc_tlb_ctx_min; \ 64 char __pad[405] 65 66#ifdef _KERNEL 67 68extern void *dpcpu0; 69 70struct pcb; 71struct pcpu; 72 73register struct pcb *curpcb __asm__(__XSTRING(PCB_REG)); 74register struct pcpu *pcpup __asm__(__XSTRING(PCPU_REG)); 75 76#define PCPU_GET(member) (pcpup->pc_ ## member) 77 78static __inline __pure2 struct thread * 79__curthread(void) 80{ 81 struct thread *td; 82 83 __asm("ldx [%" __XSTRING(PCPU_REG) "], %0" : "=r" (td)); 84 return (td); 85} 86#define curthread (__curthread()) 87 88/* 89 * XXX The implementation of this operation should be made atomic 90 * with respect to preemption. 91 */ 92#define PCPU_ADD(member, value) (pcpup->pc_ ## member += (value)) 93#define PCPU_INC(member) PCPU_ADD(member, 1) 94#define PCPU_PTR(member) (&pcpup->pc_ ## member) 95#define PCPU_SET(member,value) (pcpup->pc_ ## member = (value)) 96 97#endif /* _KERNEL */ 98 99#endif /* !_MACHINE_PCPU_H_ */ 100