2 * Copyright (c) 2005 The DragonFly Project. All rights reserved.
3 * Copyright (c) 1991 The Regents of the University of California.
6 * This code is derived from software contributed to The DragonFly Project
7 * by Matthew Dillon <dillon@backplane.com>
9 * This code is derived from software contributed to Berkeley by
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
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
20 * the documentation and/or other materials provided with the
22 * 3. Neither the name of The DragonFly Project nor the names of its
23 * contributors may be used to endorse or promote products derived
24 * from this software without specific, prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
28 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
29 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
30 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
31 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
32 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
33 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
34 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
35 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
36 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * $DragonFly: src/sys/platform/pc32/icu/icu_abi.c,v 1.14 2007/07/07 12:13:47 sephe Exp $
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/kernel.h>
45 #include <sys/machintr.h>
46 #include <sys/interrupt.h>
49 #include <machine/segments.h>
50 #include <machine/md_var.h>
51 #include <machine_base/isa/intr_machdep.h>
52 #include <machine/globaldata.h>
54 #include <sys/thread2.h>
59 extern void ICU_INTREN(int);
60 extern void ICU_INTRDIS(int);
63 IDTVEC(icu_fastintr0), IDTVEC(icu_fastintr1),
64 IDTVEC(icu_fastintr2), IDTVEC(icu_fastintr3),
65 IDTVEC(icu_fastintr4), IDTVEC(icu_fastintr5),
66 IDTVEC(icu_fastintr6), IDTVEC(icu_fastintr7),
67 IDTVEC(icu_fastintr8), IDTVEC(icu_fastintr9),
68 IDTVEC(icu_fastintr10), IDTVEC(icu_fastintr11),
69 IDTVEC(icu_fastintr12), IDTVEC(icu_fastintr13),
70 IDTVEC(icu_fastintr14), IDTVEC(icu_fastintr15);
72 static int icu_vectorctl(int, int, int);
73 static int icu_setvar(int, const void *);
74 static int icu_getvar(int, void *);
75 static void icu_finalize(void);
76 static void icu_cleanup(void);
78 static inthand_t *icu_fastintr[ICU_HWI_VECTORS] = {
79 &IDTVEC(icu_fastintr0), &IDTVEC(icu_fastintr1),
80 &IDTVEC(icu_fastintr2), &IDTVEC(icu_fastintr3),
81 &IDTVEC(icu_fastintr4), &IDTVEC(icu_fastintr5),
82 &IDTVEC(icu_fastintr6), &IDTVEC(icu_fastintr7),
83 &IDTVEC(icu_fastintr8), &IDTVEC(icu_fastintr9),
84 &IDTVEC(icu_fastintr10), &IDTVEC(icu_fastintr11),
85 &IDTVEC(icu_fastintr12), &IDTVEC(icu_fastintr13),
86 &IDTVEC(icu_fastintr14), &IDTVEC(icu_fastintr15)
89 struct machintr_abi MachIntrABI_ICU = {
91 .intrdis = ICU_INTRDIS,
93 .vectorctl =icu_vectorctl,
96 .finalize = icu_finalize,
97 .cleanup = icu_cleanup
100 static int icu_imcr_present;
103 * WARNING! SMP builds can use the ICU now so this code must be MP safe.
107 icu_setvar(int varid, const void *buf)
112 case MACHINTR_VAR_IMCR_PRESENT:
113 icu_imcr_present = *(const int *)buf;
124 icu_getvar(int varid, void *buf)
129 case MACHINTR_VAR_IMCR_PRESENT:
130 *(int *)buf = icu_imcr_present;
140 * Called before interrupts are physically enabled
147 for (intr = 0; intr < ICU_HWI_VECTORS; ++intr) {
148 machintr_intrdis(intr);
150 machintr_intren(ICU_IRQ_SLAVE);
153 * If an IMCR is present, programming bit 0 disconnects the 8259
154 * from the BSP. The 8259 may still be connected to LINT0 on the BSP's
157 * If we are running SMP the LAPIC is active, try to use virtual wire
158 * mode so we can use other interrupt sources within the LAPIC in
159 * addition to the 8259.
161 if (icu_imcr_present) {
170 * Called after interrupts physically enabled but before the
171 * critical section is released.
177 mdcpu->gd_fpending = 0;
183 icu_vectorctl(int op, int intr, int flags)
188 if (intr < 0 || intr >= ICU_HWI_VECTORS || intr == ICU_IRQ_SLAVE)
196 case MACHINTR_VECTOR_SETUP:
197 setidt(IDT_OFFSET + intr, icu_fastintr[intr], SDT_SYS386IGT, SEL_KPL,
198 GSEL(GCODE_SEL, SEL_KPL));
199 machintr_intren(intr);
201 case MACHINTR_VECTOR_TEARDOWN:
202 case MACHINTR_VECTOR_SETDEFAULT:
203 setidt(IDT_OFFSET + intr, icu_fastintr[intr], SDT_SYS386IGT, SEL_KPL,
204 GSEL(GCODE_SEL, SEL_KPL));
205 machintr_intrdis(intr);