| 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 | |