1 /*- 2 * Copyright (c) 1997 Bruce Evans. 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: src/sys/i386/isa/ipl_funcs.c,v 1.32.2.5 2002/12/17 18:04:02 sam Exp $ 27 */ 28 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/kernel.h> 32 #include <sys/sysctl.h> 33 #include <sys/proc.h> 34 #include <sys/interrupt.h> 35 #include <machine/globaldata.h> 36 37 /* 38 * Bits in the spending bitmap variable must be set atomically because 39 * spending may be manipulated by interrupts or other cpu's without holding 40 * any locks. 41 * 42 * Note: setbits uses a locked or, making simple cases MP safe. 43 */ 44 #define DO_SETBITS(name, var, bits) \ 45 void \ 46 name(void) \ 47 { \ 48 struct mdglobaldata *gd = mdcpu; \ 49 atomic_set_int_nonlocked(var, bits); \ 50 atomic_set_int(&gd->mi.gd_reqflags, RQF_INTPEND); \ 51 } \ 52 53 DO_SETBITS(setdelayed, &gd->gd_spending, loadandclear(&gd->gd_sdelayed)) 54 55 DO_SETBITS(setsoftcamnet,&gd->gd_spending, SWI_CAMNET_PENDING) 56 DO_SETBITS(setsoftcambio,&gd->gd_spending, SWI_CAMBIO_PENDING) 57 /*DO_SETBITS(setsoftunused02, &gd->gd_spending, SWI_UNUSED02_PENDING)*/ 58 /*DO_SETBITS(setsoftunused01, &gd->gd_spending, SWI_UNUSED01_PENDING)*/ 59 DO_SETBITS(setsofttty, &gd->gd_spending, SWI_TTY_PENDING) 60 DO_SETBITS(setsoftvm, &gd->gd_spending, SWI_VM_PENDING) 61 DO_SETBITS(setsofttq, &gd->gd_spending, SWI_TQ_PENDING) 62 DO_SETBITS(setsoftcrypto,&gd->gd_spending, SWI_CRYPTO_PENDING) 63 64 /*DO_SETBITS(schedsoftcamnet, &gd->gd_sdelayed, SWI_CAMNET_PENDING)*/ 65 /*DO_SETBITS(schedsoftcambio, &gd->gd_sdelayed, SWI_CAMBIO_PENDING)*/ 66 /*DO_SETBITS(schedsoftunused01, &gd->gd_sdelayed, SWI_UNUSED01_PENDING)*/ 67 DO_SETBITS(schedsofttty, &gd->gd_sdelayed, SWI_TTY_PENDING) 68 /*DO_SETBITS(schedsoftvm, &gd->gd_sdelayed, SWI_VM_PENDING)*/ 69 /*DO_SETBITS(schedsofttq, &gd->gd_sdelayed, SWI_TQ_PENDING)*/ 70 /* YYY schedsoft what? */ 71 72