Annotation of sys/arch/alpha/alpha/ipifuncs.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: ipifuncs.c,v 1.1 2007/04/13 08:31:50 martin Exp $ */
! 2: /* $NetBSD: ipifuncs.c,v 1.9 1999/12/02 01:09:11 thorpej Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
! 10: * NASA Ames Research Center.
! 11: *
! 12: * Redistribution and use in source and binary forms, with or without
! 13: * modification, are permitted provided that the following conditions
! 14: * are met:
! 15: * 1. Redistributions of source code must retain the above copyright
! 16: * notice, this list of conditions and the following disclaimer.
! 17: * 2. Redistributions in binary form must reproduce the above copyright
! 18: * notice, this list of conditions and the following disclaimer in the
! 19: * documentation and/or other materials provided with the distribution.
! 20: * 3. All advertising materials mentioning features or use of this software
! 21: * must display the following acknowledgement:
! 22: * This product includes software developed by the NetBSD
! 23: * Foundation, Inc. and its contributors.
! 24: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 25: * contributors may be used to endorse or promote products derived
! 26: * from this software without specific prior written permission.
! 27: *
! 28: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 29: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 30: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 31: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 32: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 33: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 34: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 35: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 36: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 37: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 38: * POSSIBILITY OF SUCH DAMAGE.
! 39: */
! 40:
! 41: /*
! 42: * Interprocessor interrupt handlers.
! 43: */
! 44:
! 45: #include <sys/param.h>
! 46: #include <sys/device.h>
! 47: #include <sys/systm.h>
! 48:
! 49: #include <uvm/uvm_extern.h>
! 50:
! 51: #include <machine/atomic.h>
! 52: #include <machine/alpha_cpu.h>
! 53: #include <machine/cpu.h>
! 54: #include <machine/intr.h>
! 55: #include <machine/rpb.h>
! 56:
! 57: void alpha_ipi_halt(void);
! 58: void alpha_ipi_tbia(void);
! 59: void alpha_ipi_tbiap(void);
! 60: void alpha_ipi_imb(void);
! 61: void alpha_ipi_ast(void);
! 62:
! 63: /*
! 64: * NOTE: This table must be kept in order with the bit definitions
! 65: * in <machine/intr.h>.
! 66: */
! 67: ipifunc_t ipifuncs[ALPHA_NIPIS] = {
! 68: alpha_ipi_halt,
! 69: alpha_ipi_tbia,
! 70: alpha_ipi_tbiap,
! 71: alpha_ipi_imb,
! 72: alpha_ipi_ast,
! 73: };
! 74:
! 75: /*
! 76: * Send an interprocessor interrupt.
! 77: */
! 78: void
! 79: alpha_send_ipi(cpu_id, ipimask)
! 80: u_long cpu_id, ipimask;
! 81: {
! 82:
! 83: #ifdef DIAGNOSTIC
! 84: if (cpu_id >= hwrpb->rpb_pcs_cnt ||
! 85: cpu_info[cpu_id].ci_dev == NULL)
! 86: panic("alpha_sched_ipi: bogus cpu_id");
! 87: #endif
! 88:
! 89: atomic_setbits_ulong(&cpu_info[cpu_id].ci_ipis, ipimask);
! 90: alpha_pal_wripir(cpu_id);
! 91: }
! 92:
! 93: /*
! 94: * Broadcast an IPI to all but ourselves.
! 95: */
! 96: void
! 97: alpha_broadcast_ipi(ipimask)
! 98: u_long ipimask;
! 99: {
! 100: u_long i;
! 101:
! 102: for (i = 0; i < hwrpb->rpb_pcs_cnt; i++) {
! 103: if (cpu_info[i].ci_dev == NULL)
! 104: continue;
! 105: alpha_send_ipi(i, ipimask);
! 106: }
! 107: }
! 108:
! 109: /*
! 110: * Send an IPI to all in the list but ourselves.
! 111: */
! 112: void
! 113: alpha_multicast_ipi(cpumask, ipimask)
! 114: u_long cpumask, ipimask;
! 115: {
! 116: u_long i;
! 117:
! 118: cpumask &= cpus_running;
! 119: cpumask &= ~(1UL << cpu_number());
! 120: if (cpumask == 0)
! 121: return;
! 122:
! 123: for (i = 0; i < hwrpb->rpb_pcs_cnt; i++) {
! 124: if ((cpumask & (1UL << i)) == 0)
! 125: continue;
! 126: alpha_send_ipi(i, ipimask);
! 127: }
! 128: }
! 129:
! 130: void
! 131: alpha_ipi_halt()
! 132: {
! 133: u_long cpu_id = alpha_pal_whami();
! 134: struct pcs *pcsp = LOCATE_PCS(hwrpb, cpu_id);
! 135:
! 136: /* Disable interrupts. */
! 137: (void) splhigh();
! 138:
! 139: printf("%s: shutting down...\n", cpu_info[cpu_id].ci_dev->dv_xname);
! 140: atomic_clearbits_ulong(&cpus_running, (1UL << cpu_id));
! 141:
! 142: pcsp->pcs_flags &= ~(PCS_RC | PCS_HALT_REQ);
! 143: pcsp->pcs_flags |= PCS_HALT_STAY_HALTED;
! 144: alpha_pal_halt();
! 145: /* NOTREACHED */
! 146: }
! 147:
! 148: void
! 149: alpha_ipi_tbia()
! 150: {
! 151: u_long cpu_id = alpha_pal_whami();
! 152:
! 153: /* If we're doing a TBIA, we don't need to do a TBIAP or a SHOOTDOWN. */
! 154: atomic_clearbits_ulong(&cpu_info[cpu_id].ci_ipis,
! 155: ALPHA_IPI_TBIAP|ALPHA_IPI_SHOOTDOWN);
! 156:
! 157: ALPHA_TBIA();
! 158: }
! 159:
! 160: void
! 161: alpha_ipi_tbiap()
! 162: {
! 163:
! 164: /* Can't clear SHOOTDOWN here; might have PG_ASM mappings. */
! 165:
! 166: ALPHA_TBIAP();
! 167: }
! 168:
! 169: void
! 170: alpha_ipi_imb()
! 171: {
! 172:
! 173: alpha_pal_imb();
! 174: }
! 175:
! 176: void
! 177: alpha_ipi_ast()
! 178: {
! 179:
! 180: aston(curcpu());
! 181: }
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