4 * Copyright (c) 2003 Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
28 * $DragonFly: src/lib/libcaps/globaldata.c,v 1.7 2004/07/29 08:55:02 dillon Exp $
33 struct globaldata gdary[MAXVCPU];
36 cpumask_t stopped_cpus;
37 cpumask_t smp_active_mask;
41 * Master globaldata init
44 globaldata_init(thread_t td)
46 mi_gdinit1(&gdary[0], 0);
47 mi_gdinit2(&gdary[0]);
50 * If a 'main' thread is passed make it the current thread and mark it
51 * as currently running, but not on the run queue.
54 gdary[0].gd_curthread = td;
55 lwkt_init_thread(td, NULL, 0, TDF_RUNNING|TDF_SYSTHREAD, mycpu);
60 * per-cpu globaldata init. Calls lwkt_gdinit() and md_gdinit*(). Returns
61 * with the target cpu left in a critical section.
64 mi_gdinit1(globaldata_t gd, int cpuid)
66 bzero(gd, sizeof(*gd));
67 TAILQ_INIT(&gd->gd_tdfreeq);
69 gd->gd_cpumask = (cpumask_t)1 << cpuid;
71 gd->gd_upcall.upc_magic = UPCALL_MAGIC;
72 gd->gd_upcall.upc_critoff = offsetof(struct thread, td_pri);
73 gd->gd_ipiq = malloc(sizeof(lwkt_ipiq) * MAXVCPU);
74 bzero(gd->gd_ipiq, sizeof(lwkt_ipiq) * MAXVCPU);
79 mi_gdinit2(globaldata_t gd)
81 gd->gd_upcid = upc_register(&gd->gd_upcall, upc_callused_wrapper,
82 (void *)lwkt_process_ipiq, gd);
84 panic("upc_register: failed on cpu %d\n", gd->gd_cpuid);
90 globaldata_find(int cpu)
92 KKASSERT(cpu >= 0 && cpu < ncpus);
97 libcaps_alloc_stack(int stksize)
99 return(malloc(stksize));
103 libcaps_free_stack(void *stk, int stksize)
109 * Process any pending upcalls now. Remember there is a dispatch interlock
110 * if upc_pending is non-zero, so we have to set it to zero. If we are in
111 * a critical section this function is a NOP.
116 globaldata_t gd = mycpu;
118 if (gd->gd_upcall.upc_pending) {
119 gd->gd_upcall.upc_pending = 0;
120 upc_control(UPC_CONTROL_DISPATCH, -1, (void *)1);
125 need_lwkt_resched(void)
131 cpu_send_ipiq(int dcpu)
133 upc_control(UPC_CONTROL_DISPATCH, gdary[dcpu].gd_upcid, (void *)TDPRI_CRIT);
139 upc_control(UPC_CONTROL_WAIT, -1, (void *)TDPRI_CRIT);
143 panic(const char *ctl, ...)
148 vfprintf(stderr, ctl, va);
154 * Create a new virtual cpu. The cpuid is returned and may be used
155 * in later lwkt_create() calls.
158 caps_vcpu_start(void *vgd)
160 mi_gdinit2(vgd); /* sets %gs */
171 if ((cpuid = ncpus) >= MAXVCPU)
175 mi_gdinit1(gd, cpuid);
176 rfork_thread(RFMEM|RFPROC|RFSIGSHARE, stack + sizeof(stack),
177 caps_vcpu_start, gd);
178 while (gd->gd_pid == 0)
180 /* XXX wait for upcall setup */