/*- * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ #ifndef _MACHINE_GLOBALDATA_H_ #define _MACHINE_GLOBALDATA_H_ #ifdef _KERNEL #include <sys/queue.h> /* * This structure maps out the global data that needs to be kept on a * per-cpu basis. genassym uses this to generate offsets for the assembler * code, which also provides external symbols so that C can get at them as * though they were really globals. This structure is pointed to by * the per-cpu system value (see alpha_pal_rdval() and alpha_pal_wrval()). * Inside the kernel, the globally reserved register t7 is used to * point at the globaldata structure. */ struct globaldata { struct alpha_pcb gd_idlepcb; /* pcb for idling */ struct proc *gd_curproc; /* current process */ struct proc *gd_idleproc; /* idle process */ struct proc *gd_fpcurproc; /* fp state owner */ struct pcb *gd_curpcb; /* current pcb */ struct timeval gd_switchtime; int gd_switchticks; u_int gd_cpuno; /* this cpu number */ u_int gd_other_cpus; /* all other cpus */ int gd_inside_intr; u_int64_t gd_idlepcbphys; /* pa of gd_idlepcb */ u_int64_t gd_pending_ipis; /* pending IPI events */ u_int32_t gd_next_asn; /* next ASN to allocate */ u_int32_t gd_current_asngen; /* ASN rollover check */ u_int32_t gd_intr_nesting_level; /* interrupt recursion */ u_int gd_astpending; SLIST_ENTRY(globaldata) gd_allcpu; #ifdef KTR_PERCPU volatile int gd_ktr_idx; /* Index into trace table */ char *gd_ktr_buf; char gd_ktr_buf_data[0]; #endif }; SLIST_HEAD(cpuhead, globaldata); extern struct cpuhead cpuhead; void globaldata_init(struct globaldata *pcpu, int cpuno, size_t sz); struct globaldata *globaldata_find(int cpuno); #endif /* _KERNEL */ #endif /* !_MACHINE_GLOBALDATA_H_ */