2 * Copyright (c) 1991 The Regents of the University of California.
3 * Copyright (c) 1996, by Steve Passe. All rights reserved.
4 * Copyright (c) 2005,2008 The DragonFly Project. All rights reserved.
7 * This code is derived from software contributed to The DragonFly Project
8 * by Matthew Dillon <dillon@backplane.com>
10 * This code is derived from software contributed to Berkeley by
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in
21 * the documentation and/or other materials provided with the
23 * 3. Neither the name of The DragonFly Project nor the names of its
24 * contributors may be used to endorse or promote products derived
25 * from this software without specific, prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
30 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
31 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
32 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
33 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
34 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
35 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
36 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
37 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 * $DragonFly: src/sys/platform/pc64/apic/apic_abi.c,v 1.1 2008/08/29 17:07:12 dillon Exp $
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/kernel.h>
46 #include <sys/machintr.h>
47 #include <sys/interrupt.h>
50 #include <machine/smp.h>
51 #include <machine/segments.h>
52 #include <machine/md_var.h>
53 #include <machine/clock.h> /* apic_8254_intr */
54 #include <machine_base/isa/intr_machdep.h>
55 #include <machine_base/icu/icu.h>
56 #include <machine/globaldata.h>
58 #include <sys/thread2.h>
64 extern void APIC_INTREN(int);
65 extern void APIC_INTRDIS(int);
68 IDTVEC(apic_fastintr0), IDTVEC(apic_fastintr1),
69 IDTVEC(apic_fastintr2), IDTVEC(apic_fastintr3),
70 IDTVEC(apic_fastintr4), IDTVEC(apic_fastintr5),
71 IDTVEC(apic_fastintr6), IDTVEC(apic_fastintr7),
72 IDTVEC(apic_fastintr8), IDTVEC(apic_fastintr9),
73 IDTVEC(apic_fastintr10), IDTVEC(apic_fastintr11),
74 IDTVEC(apic_fastintr12), IDTVEC(apic_fastintr13),
75 IDTVEC(apic_fastintr14), IDTVEC(apic_fastintr15),
76 IDTVEC(apic_fastintr16), IDTVEC(apic_fastintr17),
77 IDTVEC(apic_fastintr18), IDTVEC(apic_fastintr19),
78 IDTVEC(apic_fastintr20), IDTVEC(apic_fastintr21),
79 IDTVEC(apic_fastintr22), IDTVEC(apic_fastintr23);
81 static int apic_setvar(int, const void *);
82 static int apic_getvar(int, void *);
83 static int apic_vectorctl(int, int, int);
84 static void apic_finalize(void);
85 static void apic_cleanup(void);
87 static inthand_t *apic_fastintr[APIC_HWI_VECTORS] = {
88 &IDTVEC(apic_fastintr0), &IDTVEC(apic_fastintr1),
89 &IDTVEC(apic_fastintr2), &IDTVEC(apic_fastintr3),
90 &IDTVEC(apic_fastintr4), &IDTVEC(apic_fastintr5),
91 &IDTVEC(apic_fastintr6), &IDTVEC(apic_fastintr7),
92 &IDTVEC(apic_fastintr8), &IDTVEC(apic_fastintr9),
93 &IDTVEC(apic_fastintr10), &IDTVEC(apic_fastintr11),
94 &IDTVEC(apic_fastintr12), &IDTVEC(apic_fastintr13),
95 &IDTVEC(apic_fastintr14), &IDTVEC(apic_fastintr15),
96 &IDTVEC(apic_fastintr16), &IDTVEC(apic_fastintr17),
97 &IDTVEC(apic_fastintr18), &IDTVEC(apic_fastintr19),
98 &IDTVEC(apic_fastintr20), &IDTVEC(apic_fastintr21),
99 &IDTVEC(apic_fastintr22), &IDTVEC(apic_fastintr23)
102 static int apic_imcr_present;
104 struct machintr_abi MachIntrABI = {
106 .intrdis = APIC_INTRDIS,
107 .intren = APIC_INTREN,
108 .vectorctl = apic_vectorctl,
109 .setvar = apic_setvar,
110 .getvar = apic_getvar,
111 .finalize = apic_finalize,
112 .cleanup = apic_cleanup
116 apic_setvar(int varid, const void *buf)
121 case MACHINTR_VAR_IMCR_PRESENT:
122 apic_imcr_present = *(const int *)buf;
132 apic_getvar(int varid, void *buf)
137 case MACHINTR_VAR_IMCR_PRESENT:
138 *(int *)buf = apic_imcr_present;
148 * Called before interrupts are physically enabled, this routine does the
149 * final configuration of the BSP's local APIC:
151 * - disable 'pic mode'.
152 * - disable 'virtual wire mode'.
161 * If an IMCR is present, program bit 0 to disconnect the 8259
162 * from the BSP. The 8259 may still be connected to LINT0 on
165 if (apic_imcr_present) {
166 outb(0x22, 0x70); /* select IMCR */
167 outb(0x23, 0x01); /* disconnect 8259 */
171 * Setup lint0 (the 8259 'virtual wire' connection). We
172 * mask the interrupt, completing the disconnection of the
175 temp = lapic->lvt_lint0;
176 temp |= APIC_LVT_MASKED;
177 lapic->lvt_lint0 = temp;
180 * setup lint1 to handle an NMI
182 temp = lapic->lvt_lint1;
183 temp &= ~APIC_LVT_MASKED;
184 lapic->lvt_lint1 = temp;
187 apic_dump("bsp_apic_configure()");
191 * This routine is called after physical interrupts are enabled but before
192 * the critical section is released. We need to clean out any interrupts
193 * that had already been posted to the cpu.
198 mdcpu->gd_fpending = 0;
203 apic_vectorctl(int op, int intr, int flags)
211 if (intr < 0 || intr >= APIC_HWI_VECTORS)
219 case MACHINTR_VECTOR_SETUP:
220 vector = TPR_FAST_INTS + intr;
221 setidt(vector, apic_fastintr[intr], SDT_SYSIGT, SEL_KPL, 0);
224 * Now reprogram the vector in the IO APIC. In order to avoid
225 * losing an EOI for a level interrupt, which is vector based,
226 * make sure that the IO APIC is programmed for edge-triggering
227 * first, then reprogrammed with the new vector. This should
230 if (int_to_apicintpin[intr].ioapic >= 0) {
232 select = int_to_apicintpin[intr].redirindex;
233 value = io_apic_read(int_to_apicintpin[intr].ioapic, select);
234 io_apic_write(int_to_apicintpin[intr].ioapic,
235 select, (value & ~APIC_TRIGMOD_MASK));
236 io_apic_write(int_to_apicintpin[intr].ioapic,
237 select, (value & ~IOART_INTVEC) | vector);
240 machintr_intren(intr);
242 case MACHINTR_VECTOR_TEARDOWN:
244 * Teardown an interrupt vector. The vector should already be
245 * installed in the cpu's IDT, but make sure.
247 machintr_intrdis(intr);
248 vector = TPR_FAST_INTS + intr;
249 setidt(vector, apic_fastintr[intr], SDT_SYSIGT, SEL_KPL, 0);
252 * And then reprogram the IO APIC to point to the SLOW vector (it may
253 * have previously been pointed to the FAST version of the vector).
254 * This will allow us to keep track of spurious interrupts.
256 * In order to avoid losing an EOI for a level interrupt, which is
257 * vector based, make sure that the IO APIC is programmed for
258 * edge-triggering first, then reprogrammed with the new vector.
259 * This should clear the IRR bit.
261 if (int_to_apicintpin[intr].ioapic >= 0) {
263 select = int_to_apicintpin[intr].redirindex;
264 value = io_apic_read(int_to_apicintpin[intr].ioapic, select);
265 io_apic_write(int_to_apicintpin[intr].ioapic,
266 select, (value & ~APIC_TRIGMOD_MASK));
267 io_apic_write(int_to_apicintpin[intr].ioapic,
268 select, (value & ~IOART_INTVEC) | vector);
272 case MACHINTR_VECTOR_SETDEFAULT:
274 * This is a just-in-case an int pin is running through the 8259
275 * when we don't expect it to, or an IO APIC pin somehow wound
276 * up getting enabled without us specifically programming it in
277 * this ABI. Note that IO APIC pins are by default programmed
278 * to IDT_OFFSET + intr.
280 vector = IDT_OFFSET + intr;
281 setidt(vector, apic_fastintr[intr], SDT_SYSIGT, SEL_KPL, 0);