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 1.3 2003/12/07 04:21:52 dillon Exp $
33 struct globaldata gdary[MAXVCPU];
37 u_int32_t stopped_cpus;
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, 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);
70 gd->gd_upcall.upc_magic = UPCALL_MAGIC;
71 gd->gd_upcall.upc_critoff = offsetof(struct thread, td_pri);
72 gd->gd_ipiq = malloc(sizeof(lwkt_ipiq) * MAXVCPU);
73 bzero(gd->gd_ipiq, sizeof(lwkt_ipiq) * MAXVCPU);
78 mi_gdinit2(globaldata_t gd)
80 gd->gd_upcid = upc_register(&gd->gd_upcall, upc_callused_wrapper,
81 (void *)lwkt_process_ipiq, gd);
83 panic("upc_register: failed on cpu %d\n", gd->gd_cpuid);
89 globaldata_find(int cpu)
91 KKASSERT(cpu >= 0 && cpu < ncpus);
96 libcaps_alloc_stack(int stksize)
98 return(malloc(stksize));
102 libcaps_free_stack(void *stk, int stksize)
108 * Process any pending upcalls now. Remember there is a dispatch interlock
109 * if upc_pending is non-zero, so we have to set it to zero. If we are in
110 * a critical section this function is a NOP.
115 globaldata_t gd = mycpu;
117 if (gd->gd_upcall.upc_pending) {
118 gd->gd_upcall.upc_pending = 0;
119 upc_control(UPC_CONTROL_DISPATCH, -1, (void *)1);
130 cpu_send_ipiq(int dcpu)
132 upc_control(UPC_CONTROL_DISPATCH, gdary[dcpu].gd_upcid, (void *)TDPRI_CRIT);
138 upc_control(UPC_CONTROL_WAIT, -1, (void *)TDPRI_CRIT);
142 panic(const char *ctl, ...)
147 vfprintf(stderr, ctl, va);
153 * Create a new virtual cpu. The cpuid is returned and may be used
154 * in later lwkt_create() calls.
157 caps_vcpu_start(void *vgd)
159 mi_gdinit2(vgd); /* sets %gs */
170 if ((cpuid = ncpus) >= MAXVCPU)
174 mi_gdinit1(gd, cpuid);
175 rfork_thread(RFMEM|RFPROC|RFSIGSHARE, stack + sizeof(stack),
176 caps_vcpu_start, gd);
177 while (gd->gd_pid == 0)
179 /* XXX wait for upcall setup */