cyclic_machdep.c revision 179260
1179260Sjb/*- 2179260Sjb * Copyright 2006-2008 John Birrell <jb@FreeBSD.org> 3179260Sjb * 4179260Sjb * Redistribution and use in source and binary forms, with or without 5179260Sjb * modification, are permitted provided that the following conditions 6179260Sjb * are met: 7179260Sjb * 1. Redistributions of source code must retain the above copyright 8179260Sjb * notice, this list of conditions and the following disclaimer. 9179260Sjb * 2. Redistributions in binary form must reproduce the above copyright 10179260Sjb * notice, this list of conditions and the following disclaimer in the 11179260Sjb * documentation and/or other materials provided with the distribution. 12179260Sjb * 13179260Sjb * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14179260Sjb * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15179260Sjb * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16179260Sjb * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 17179260Sjb * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18179260Sjb * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19179260Sjb * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20179260Sjb * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21179260Sjb * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22179260Sjb * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23179260Sjb * SUCH DAMAGE. 24179260Sjb * 25179260Sjb * $FreeBSD: head/sys/cddl/dev/cyclic/i386/cyclic_machdep.c 179260 2008-05-23 22:21:58Z jb $ 26179260Sjb * 27179260Sjb */ 28179260Sjb 29179260Sjbstatic void enable(cyb_arg_t); 30179260Sjbstatic void disable(cyb_arg_t); 31179260Sjbstatic void reprogram(cyb_arg_t, hrtime_t); 32179260Sjbstatic void xcall(cyb_arg_t, cpu_t *, cyc_func_t, void *); 33179260Sjb 34179260Sjbstatic cyc_backend_t be = { 35179260Sjb NULL, /* cyb_configure */ 36179260Sjb NULL, /* cyb_unconfigure */ 37179260Sjb enable, 38179260Sjb disable, 39179260Sjb reprogram, 40179260Sjb xcall, 41179260Sjb NULL /* cyb_arg_t cyb_arg */ 42179260Sjb}; 43179260Sjb 44179260Sjbstatic void 45179260Sjbcyclic_ap_start(void *dummy) 46179260Sjb{ 47179260Sjb /* Initialise the rest of the CPUs. */ 48179260Sjb cyclic_mp_init(); 49179260Sjb} 50179260Sjb 51179260SjbSYSINIT(cyclic_ap_start, SI_SUB_SMP, SI_ORDER_ANY, cyclic_ap_start, NULL); 52179260Sjb 53179260Sjb/* 54179260Sjb * Machine dependent cyclic subsystem initialisation. 55179260Sjb */ 56179260Sjbstatic void 57179260Sjbcyclic_machdep_init(void) 58179260Sjb{ 59179260Sjb /* Register the cyclic backend. */ 60179260Sjb cyclic_init(&be); 61179260Sjb} 62179260Sjb 63179260Sjbstatic void 64179260Sjbcyclic_machdep_uninit(void) 65179260Sjb{ 66179260Sjb int i; 67179260Sjb 68179260Sjb for (i = 0; i <= mp_maxid; i++) 69179260Sjb /* Reset the cyclic clock callback hook. */ 70179260Sjb lapic_cyclic_clock_func[i] = NULL; 71179260Sjb 72179260Sjb /* De-register the cyclic backend. */ 73179260Sjb cyclic_uninit(); 74179260Sjb} 75179260Sjb 76179260Sjbstatic hrtime_t exp_due[MAXCPU]; 77179260Sjb 78179260Sjb/* 79179260Sjb * This function is the one registered by the machine dependent 80179260Sjb * initialiser as the callback for high speed timer events. 81179260Sjb */ 82179260Sjbstatic void 83179260Sjbcyclic_clock(struct trapframe *frame) 84179260Sjb{ 85179260Sjb cpu_t *c = &solaris_cpu[curcpu]; 86179260Sjb 87179260Sjb if (c->cpu_cyclic != NULL && gethrtime() >= exp_due[curcpu]) { 88179260Sjb if (TRAPF_USERMODE(frame)) { 89179260Sjb c->cpu_profile_pc = 0; 90179260Sjb c->cpu_profile_upc = TRAPF_PC(frame); 91179260Sjb } else { 92179260Sjb c->cpu_profile_pc = TRAPF_PC(frame); 93179260Sjb c->cpu_profile_upc = 0; 94179260Sjb } 95179260Sjb 96179260Sjb c->cpu_intr_actv = 1; 97179260Sjb 98179260Sjb /* Fire any timers that are due. */ 99179260Sjb cyclic_fire(c); 100179260Sjb 101179260Sjb c->cpu_intr_actv = 0; 102179260Sjb } 103179260Sjb} 104179260Sjb 105179260Sjbstatic void enable(cyb_arg_t arg) 106179260Sjb{ 107179260Sjb /* Register the cyclic clock callback function. */ 108179260Sjb lapic_cyclic_clock_func[curcpu] = cyclic_clock; 109179260Sjb} 110179260Sjb 111179260Sjbstatic void disable(cyb_arg_t arg) 112179260Sjb{ 113179260Sjb /* Reset the cyclic clock callback function. */ 114179260Sjb lapic_cyclic_clock_func[curcpu] = NULL; 115179260Sjb} 116179260Sjb 117179260Sjbstatic void reprogram(cyb_arg_t arg, hrtime_t exp) 118179260Sjb{ 119179260Sjb exp_due[curcpu] = exp; 120179260Sjb} 121179260Sjb 122179260Sjbstatic void xcall(cyb_arg_t arg, cpu_t *c, cyc_func_t func, void *param) 123179260Sjb{ 124179260Sjb /* 125179260Sjb * If the target CPU is the current one, just call the 126179260Sjb * function. This covers the non-SMP case. 127179260Sjb */ 128179260Sjb if (c == &solaris_cpu[curcpu]) 129179260Sjb (*func)(param); 130179260Sjb else 131179260Sjb smp_rendezvous_cpus((cpumask_t) (1 << c->cpuid), NULL, 132179260Sjb func, smp_no_rendevous_barrier, param); 133179260Sjb} 134