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Annotation of sys/arch/amd64/amd64/ipifuncs.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: ipifuncs.c,v 1.7 2007/05/25 16:22:11 art Exp $        */
                      2: /*     $NetBSD: ipifuncs.c,v 1.1 2003/04/26 18:39:28 fvdl Exp $ */
                      3:
                      4: /*-
                      5:  * Copyright (c) 2000 The NetBSD Foundation, Inc.
                      6:  * All rights reserved.
                      7:  *
                      8:  * This code is derived from software contributed to The NetBSD Foundation
                      9:  * by RedBack Networks Inc.
                     10:  *
                     11:  * Author: Bill Sommerfeld
                     12:  *
                     13:  * Redistribution and use in source and binary forms, with or without
                     14:  * modification, are permitted provided that the following conditions
                     15:  * are met:
                     16:  * 1. Redistributions of source code must retain the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer.
                     18:  * 2. Redistributions in binary form must reproduce the above copyright
                     19:  *    notice, this list of conditions and the following disclaimer in the
                     20:  *    documentation and/or other materials provided with the distribution.
                     21:  * 3. All advertising materials mentioning features or use of this software
                     22:  *    must display the following acknowledgement:
                     23:  *        This product includes software developed by the NetBSD
                     24:  *        Foundation, Inc. and its contributors.
                     25:  * 4. Neither the name of The NetBSD Foundation nor the names of its
                     26:  *    contributors may be used to endorse or promote products derived
                     27:  *    from this software without specific prior written permission.
                     28:  *
                     29:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
                     30:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
                     31:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                     32:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
                     33:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
                     34:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
                     35:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
                     36:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
                     37:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
                     38:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     39:  * POSSIBILITY OF SUCH DAMAGE.
                     40:  */
                     41:
                     42: #include <sys/cdefs.h>                 /* RCS ID & Copyright macro defns */
                     43:
                     44: /*
                     45:  * Interprocessor interrupt handlers.
                     46:  */
                     47:
                     48: #include <sys/param.h>
                     49: #include <sys/device.h>
                     50: #include <sys/systm.h>
                     51:
                     52: #include <uvm/uvm_extern.h>
                     53:
                     54: #include <machine/intr.h>
                     55: #include <machine/atomic.h>
                     56: #include <machine/cpuvar.h>
                     57: #include <machine/i82093var.h>
                     58: #include <machine/i82489reg.h>
                     59: #include <machine/i82489var.h>
                     60: #include <machine/mtrr.h>
                     61: #include <machine/gdt.h>
                     62: #include <machine/fpu.h>
                     63:
                     64: #include <ddb/db_output.h>
                     65: #include <machine/db_machdep.h>
                     66:
                     67: void x86_64_ipi_halt(struct cpu_info *);
                     68:
                     69: void x86_64_ipi_synch_fpu(struct cpu_info *);
                     70: void x86_64_ipi_flush_fpu(struct cpu_info *);
                     71:
                     72: void x86_64_ipi_nop(struct cpu_info *);
                     73:
                     74: #ifdef MTRR
                     75: void x86_64_reload_mtrr(struct cpu_info *);
                     76: #else
                     77: #define x86_64_reload_mtrr NULL
                     78: #endif
                     79:
                     80: void (*ipifunc[X86_NIPI])(struct cpu_info *) =
                     81: {
                     82:        x86_64_ipi_halt,
                     83:        x86_64_ipi_nop,
                     84:        x86_64_ipi_flush_fpu,
                     85:        x86_64_ipi_synch_fpu,
                     86:        NULL,
                     87:        x86_64_reload_mtrr,
                     88:        gdt_reload_cpu,
                     89: #ifdef DDB
                     90:        x86_ipi_db,
                     91: #else
                     92:        NULL,
                     93: #endif
                     94:        x86_setperf_ipi,
                     95: };
                     96:
                     97: void
                     98: x86_64_ipi_nop(struct cpu_info *ci)
                     99: {
                    100: }
                    101:
                    102: void
                    103: x86_64_ipi_halt(struct cpu_info *ci)
                    104: {
                    105:        disable_intr();
                    106:
                    107:        for(;;) {
                    108:                __asm __volatile("hlt");
                    109:        }
                    110: }
                    111:
                    112: void
                    113: x86_64_ipi_flush_fpu(struct cpu_info *ci)
                    114: {
                    115:        fpusave_cpu(ci, 0);
                    116: }
                    117:
                    118: void
                    119: x86_64_ipi_synch_fpu(struct cpu_info *ci)
                    120: {
                    121:        fpusave_cpu(ci, 1);
                    122: }
                    123:
                    124: #ifdef MTRR
                    125:
                    126: /*
                    127:  * mtrr_reload_cpu() is a macro in mtrr.h which picks the appropriate
                    128:  * function to use..
                    129:  */
                    130:
                    131: void
                    132: x86_64_reload_mtrr(struct cpu_info *ci)
                    133: {
                    134:        if (mtrr_funcs != NULL)
                    135:                mtrr_reload_cpu(ci);
                    136: }
                    137: #endif