1 | /* $NetBSD: i8259.c,v 1.16 2013/11/06 20:19:03 mrg Exp $ */ |
2 | |
3 | /* |
4 | * Copyright 2002 (c) Wasabi Systems, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * Written by Frank van der Linden for Wasabi Systems, Inc. |
8 | * |
9 | * Redistribution and use in source and binary forms, with or without |
10 | * modification, are permitted provided that the following conditions |
11 | * are met: |
12 | * 1. Redistributions of source code must retain the above copyright |
13 | * notice, this list of conditions and the following disclaimer. |
14 | * 2. Redistributions in binary form must reproduce the above copyright |
15 | * notice, this list of conditions and the following disclaimer in the |
16 | * documentation and/or other materials provided with the distribution. |
17 | * 3. All advertising materials mentioning features or use of this software |
18 | * must display the following acknowledgement: |
19 | * This product includes software developed for the NetBSD Project by |
20 | * Wasabi Systems, Inc. |
21 | * 4. The name of Wasabi Systems, Inc. may not be used to endorse |
22 | * or promote products derived from this software without specific prior |
23 | * written permission. |
24 | * |
25 | * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND |
26 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
27 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
28 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC |
29 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
32 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
33 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
34 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
35 | * POSSIBILITY OF SUCH DAMAGE. |
36 | */ |
37 | |
38 | /*- |
39 | * Copyright (c) 1991 The Regents of the University of California. |
40 | * All rights reserved. |
41 | * |
42 | * This code is derived from software contributed to Berkeley by |
43 | * William Jolitz. |
44 | * |
45 | * Redistribution and use in source and binary forms, with or without |
46 | * modification, are permitted provided that the following conditions |
47 | * are met: |
48 | * 1. Redistributions of source code must retain the above copyright |
49 | * notice, this list of conditions and the following disclaimer. |
50 | * 2. Redistributions in binary form must reproduce the above copyright |
51 | * notice, this list of conditions and the following disclaimer in the |
52 | * documentation and/or other materials provided with the distribution. |
53 | * 3. Neither the name of the University nor the names of its contributors |
54 | * may be used to endorse or promote products derived from this software |
55 | * without specific prior written permission. |
56 | * |
57 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
58 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
59 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
60 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
61 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
62 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
63 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
64 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
65 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
66 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
67 | * SUCH DAMAGE. |
68 | * |
69 | * @(#)isa.c 7.2 (Berkeley) 5/13/91 |
70 | */ |
71 | |
72 | #include <sys/cdefs.h> |
73 | __KERNEL_RCSID(0, "$NetBSD: i8259.c,v 1.16 2013/11/06 20:19:03 mrg Exp $" ); |
74 | |
75 | #include <sys/param.h> |
76 | #include <sys/systm.h> |
77 | #include <sys/kernel.h> |
78 | #include <sys/syslog.h> |
79 | #include <sys/device.h> |
80 | #include <sys/proc.h> |
81 | |
82 | #include <dev/isa/isareg.h> |
83 | #include <dev/ic/i8259reg.h> |
84 | |
85 | #include <machine/pio.h> |
86 | #include <machine/cpufunc.h> |
87 | #include <machine/cpu.h> |
88 | #include <machine/pic.h> |
89 | #include <machine/i8259.h> |
90 | |
91 | |
92 | #ifndef __x86_64__ |
93 | #include "mca.h" |
94 | #if NMCA > 0 |
95 | #include <machine/mca_machdep.h> /* for MCA_system */ |
96 | #endif |
97 | #endif |
98 | |
99 | static void i8259_hwmask(struct pic *, int); |
100 | static void i8259_hwunmask(struct pic *, int); |
101 | static void i8259_setup(struct pic *, struct cpu_info *, int, int, int); |
102 | static void i8259_reinit_irqs(void); |
103 | |
104 | unsigned i8259_imen; |
105 | |
106 | /* |
107 | * Perhaps this should be made into a real device. |
108 | */ |
109 | struct pic i8259_pic = { |
110 | .pic_name = "pic0" , |
111 | .pic_type = PIC_I8259, |
112 | .pic_vecbase = 0, |
113 | .pic_apicid = 0, |
114 | .pic_lock = __SIMPLELOCK_UNLOCKED, |
115 | .pic_hwmask = i8259_hwmask, |
116 | .pic_hwunmask = i8259_hwunmask, |
117 | .pic_addroute = i8259_setup, |
118 | .pic_delroute = i8259_setup, |
119 | .pic_level_stubs = i8259_stubs, |
120 | .pic_edge_stubs = i8259_stubs, |
121 | }; |
122 | |
123 | void |
124 | i8259_default_setup(void) |
125 | { |
126 | #if NMCA > 0 |
127 | /* level-triggered interrupts on MCA PS/2s */ |
128 | if (MCA_system) |
129 | /* reset; program device, level-triggered, four bytes */ |
130 | outb(IO_ICU1 + PIC_ICW1, ICW1_SELECT | ICW1_LTIM | ICW1_IC4); |
131 | else |
132 | #endif |
133 | /* reset; program device, four bytes */ |
134 | outb(IO_ICU1 + PIC_ICW1, ICW1_SELECT | ICW1_IC4); |
135 | |
136 | /* starting at this vector index */ |
137 | outb(IO_ICU1 + PIC_ICW2, ICU_OFFSET); |
138 | /* slave on line 2 */ |
139 | outb(IO_ICU1 + PIC_ICW3, ICW3_CASCADE(IRQ_SLAVE)); |
140 | |
141 | #ifdef AUTO_EOI_1 |
142 | /* auto EOI, 8086 mode */ |
143 | outb(IO_ICU1 + PIC_ICW4, ICW4_AEOI | ICW4_8086); |
144 | #else |
145 | /* 8086 mode */ |
146 | outb(IO_ICU1 + PIC_ICW4, ICW4_8086); |
147 | #endif |
148 | /* leave interrupts masked */ |
149 | outb(IO_ICU1 + PIC_OCW1, 0xff); |
150 | /* special mask mode (if available) */ |
151 | outb(IO_ICU1 + PIC_OCW3, OCW3_SELECT | OCW3_SSMM | OCW3_SMM); |
152 | /* Read IRR by default. */ |
153 | outb(IO_ICU1 + PIC_OCW3, OCW3_SELECT | OCW3_RR); |
154 | #ifdef REORDER_IRQ |
155 | /* pri order 3-7, 0-2 (com2 first) */ |
156 | outb(IO_ICU1 + PIC_OCW2, OCW2_SELECT | OCW2_R | OCW2_SL | |
157 | OCW2_ILS(3 - 1)); |
158 | #endif |
159 | |
160 | #if NMCA > 0 |
161 | /* level-triggered interrupts on MCA PS/2s */ |
162 | if (MCA_system) |
163 | /* reset; program device, level-triggered, four bytes */ |
164 | outb(IO_ICU2 + PIC_ICW1, ICW1_SELECT | ICW1_LTIM | ICW1_IC4); |
165 | else |
166 | #endif |
167 | /* reset; program device, four bytes */ |
168 | outb(IO_ICU2 + PIC_ICW1, ICW1_SELECT | ICW1_IC4); |
169 | |
170 | /* staring at this vector index */ |
171 | outb(IO_ICU2 + PIC_ICW2, ICU_OFFSET + 8); |
172 | /* slave connected to line 2 of master */ |
173 | outb(IO_ICU2 + PIC_ICW3, ICW3_SIC(IRQ_SLAVE)); |
174 | #ifdef AUTO_EOI_2 |
175 | /* auto EOI, 8086 mode */ |
176 | outb(IO_ICU2 + PIC_ICW4, ICW4_AEOI | ICW4_8086); |
177 | #else |
178 | /* 8086 mode */ |
179 | outb(IO_ICU2 + PIC_ICW4, ICW4_8086); |
180 | #endif |
181 | /* leave interrupts masked */ |
182 | outb(IO_ICU2 + PIC_OCW1, 0xff); |
183 | /* special mask mode (if available) */ |
184 | outb(IO_ICU2 + PIC_OCW3, OCW3_SELECT | OCW3_SSMM | OCW3_SMM); |
185 | /* Read IRR by default. */ |
186 | outb(IO_ICU2 + PIC_OCW3, OCW3_SELECT | OCW3_RR); |
187 | } |
188 | |
189 | static void |
190 | i8259_hwmask(struct pic *pic, int pin) |
191 | { |
192 | unsigned port; |
193 | uint8_t byte; |
194 | |
195 | i8259_imen |= (1 << pin); |
196 | #ifdef PIC_MASKDELAY |
197 | delay(10); |
198 | #endif |
199 | if (pin > 7) { |
200 | port = IO_ICU2 + PIC_OCW1; |
201 | byte = i8259_imen >> 8; |
202 | } else { |
203 | port = IO_ICU1 + PIC_OCW1; |
204 | byte = i8259_imen & 0xff; |
205 | } |
206 | outb(port, byte); |
207 | } |
208 | |
209 | static void |
210 | i8259_hwunmask(struct pic *pic, int pin) |
211 | { |
212 | unsigned port; |
213 | uint8_t byte; |
214 | |
215 | x86_disable_intr(); /* XXX */ |
216 | i8259_imen &= ~(1 << pin); |
217 | #ifdef PIC_MASKDELAY |
218 | delay(10); |
219 | #endif |
220 | if (pin > 7) { |
221 | port = IO_ICU2 + PIC_OCW1; |
222 | byte = i8259_imen >> 8; |
223 | } else { |
224 | port = IO_ICU1 + PIC_OCW1; |
225 | byte = i8259_imen & 0xff; |
226 | } |
227 | outb(port, byte); |
228 | x86_enable_intr(); |
229 | } |
230 | |
231 | static void |
232 | i8259_reinit_irqs(void) |
233 | { |
234 | int irqs, irq; |
235 | struct cpu_info *ci = &cpu_info_primary; |
236 | const size_t array_len = MIN(__arraycount(ci->ci_isources), |
237 | NUM_LEGACY_IRQS); |
238 | |
239 | irqs = 0; |
240 | for (irq = 0; irq < array_len; irq++) |
241 | if (ci->ci_isources[irq] != NULL) |
242 | irqs |= 1 << irq; |
243 | if (irqs >= 0x100) /* any IRQs >= 8 in use */ |
244 | irqs |= 1 << IRQ_SLAVE; |
245 | i8259_imen = ~irqs; |
246 | |
247 | outb(IO_ICU1 + PIC_OCW1, i8259_imen); |
248 | outb(IO_ICU2 + PIC_OCW1, i8259_imen >> 8); |
249 | } |
250 | |
251 | static void |
252 | i8259_setup(struct pic *pic, struct cpu_info *ci, |
253 | int pin, int idtvec, int type) |
254 | { |
255 | if (CPU_IS_PRIMARY(ci)) |
256 | i8259_reinit_irqs(); |
257 | } |
258 | |
259 | void |
260 | i8259_reinit(void) |
261 | { |
262 | i8259_default_setup(); |
263 | i8259_reinit_irqs(); |
264 | } |
265 | |
266 | unsigned |
267 | i8259_setmask(unsigned mask) |
268 | { |
269 | unsigned old = i8259_imen; |
270 | |
271 | i8259_imen = mask; |
272 | outb(IO_ICU1 + PIC_OCW1, i8259_imen); |
273 | outb(IO_ICU2 + PIC_OCW1, i8259_imen >> 8); |
274 | return old; |
275 | } |
276 | |