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 * $FreeBSD$ 27 */ 28 29 #ifndef _MACHINE_GLOBALDATA_H_ 30 #define _MACHINE_GLOBALDATA_H_ 31 32 #ifdef _KERNEL 33 34 #include <sys/queue.h> 35 36 /* 37 * This structure maps out the global data that needs to be kept on a 38 * per-cpu basis. genassym uses this to generate offsets for the assembler 39 * code, which also provides external symbols so that C can get at them as 40 * though they were really globals. This structure is pointed to by 41 * the per-cpu system value (see alpha_pal_rdval() and alpha_pal_wrval()). 42 * Inside the kernel, the globally reserved register t7 is used to 43 * point at the globaldata structure. 44 */ 45 struct globaldata { 46 struct alpha_pcb gd_idlepcb; /* pcb for idling */ 47 struct proc *gd_curproc; /* current process */ 48 struct proc *gd_idleproc; /* idle process */ 49 struct proc *gd_fpcurproc; /* fp state owner */ 50 struct pcb *gd_curpcb; /* current pcb */ 51 struct timeval gd_switchtime; 52 int gd_switchticks; 53 u_int gd_cpuno; /* this cpu number */ 54 u_int gd_other_cpus; /* all other cpus */ 55 int gd_inside_intr; 56 u_int64_t gd_idlepcbphys; /* pa of gd_idlepcb */ 57 u_int64_t gd_pending_ipis; /* pending IPI events */ 58 u_int32_t gd_next_asn; /* next ASN to allocate */ 59 u_int32_t gd_current_asngen; /* ASN rollover check */ 60 u_int32_t gd_intr_nesting_level; /* interrupt recursion */ 61 62 u_int gd_astpending; 63 SLIST_ENTRY(globaldata) gd_allcpu; 64 int gd_witness_spin_check; 65 #ifdef KTR_PERCPU 66 volatile int gd_ktr_idx; /* Index into trace table */ 67 char *gd_ktr_buf; 68 char gd_ktr_buf_data[0]; 69 #endif 70 }; 71 72 SLIST_HEAD(cpuhead, globaldata); 73 extern struct cpuhead cpuhead; 74 75 void globaldata_init(struct globaldata *pcpu, int cpuno, size_t sz); 76 struct globaldata *globaldata_find(int cpuno); 77 78 #endif /* _KERNEL */ 79 80 #endif /* !_MACHINE_GLOBALDATA_H_ */ 81