sys/platform/pc32/icu/icu_abi.c

   1 /*
   2  * Copyright (c) 2005 The DragonFly Project.  All rights reserved.
   3  * Copyright (c) 1991 The Regents of the University of California.
   4  * All rights reserved.
   5  *
   6  * This code is derived from software contributed to The DragonFly Project
   7  * by Matthew Dillon <dillon@backplane.com>
   8  *
   9  * This code is derived from software contributed to Berkeley by
  10  * William Jolitz.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  *
  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
  21  *    distribution.
  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.
  25  *
  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
  37  * SUCH DAMAGE.
  38  *
  39  * $DragonFly: src/sys/platform/pc32/icu/icu_abi.c,v 1.14 2007/07/07 12:13:47 sephe Exp $
  40  */
  41
  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>
  47 #include <sys/rman.h>
  48 #include <sys/bus.h>
  49
  50 #include <machine/segments.h>
  51 #include <machine/md_var.h>
  52 #include <machine/intr_machdep.h>
  53 #include <machine/globaldata.h>
  54 #include <machine/smp.h>
  55
  56 #include <sys/thread2.h>
  57
  58 #include <machine_base/icu/elcr_var.h>
  59
  60 #include <machine_base/icu/icu.h>
  61 #include <machine_base/icu/icu_ipl.h>
  62 #include <machine_base/apic/ioapic.h>
  63
  64 extern inthand_t
  65         IDTVEC(icu_intr0),      IDTVEC(icu_intr1),
  66         IDTVEC(icu_intr2),      IDTVEC(icu_intr3),
  67         IDTVEC(icu_intr4),      IDTVEC(icu_intr5),
  68         IDTVEC(icu_intr6),      IDTVEC(icu_intr7),
  69         IDTVEC(icu_intr8),      IDTVEC(icu_intr9),
  70         IDTVEC(icu_intr10),     IDTVEC(icu_intr11),
  71         IDTVEC(icu_intr12),     IDTVEC(icu_intr13),
  72         IDTVEC(icu_intr14),     IDTVEC(icu_intr15);
  73
  74 static inthand_t *icu_intr[ICU_HWI_VECTORS] = {
  75         &IDTVEC(icu_intr0),     &IDTVEC(icu_intr1),
  76         &IDTVEC(icu_intr2),     &IDTVEC(icu_intr3),
  77         &IDTVEC(icu_intr4),     &IDTVEC(icu_intr5),
  78         &IDTVEC(icu_intr6),     &IDTVEC(icu_intr7),
  79         &IDTVEC(icu_intr8),     &IDTVEC(icu_intr9),
  80         &IDTVEC(icu_intr10),    &IDTVEC(icu_intr11),
  81         &IDTVEC(icu_intr12),    &IDTVEC(icu_intr13),
  82         &IDTVEC(icu_intr14),    &IDTVEC(icu_intr15)
  83 };
  84
  85 static struct icu_irqmap {
  86         int                     im_type;        /* ICU_IMT_ */
  87         enum intr_trigger       im_trig;
  88 } icu_irqmaps[MAXCPU][IDT_HWI_VECTORS];
  89
  90 #define ICU_IMT_UNUSED          0       /* KEEP THIS */
  91 #define ICU_IMT_RESERVED        1
  92 #define ICU_IMT_LINE            2
  93 #define ICU_IMT_SYSCALL         3
  94
  95 #define ICU_IMT_ISHWI(map)      ((map)->im_type != ICU_IMT_RESERVED && \
  96                                  (map)->im_type != ICU_IMT_SYSCALL)
  97
  98 extern void     ICU_INTREN(int);
  99 extern void     ICU_INTRDIS(int);
 100
 101 extern int      imcr_present;
 102
 103 static void     icu_abi_intr_setup(int, int);
 104 static void     icu_abi_intr_teardown(int);
 105 static void     icu_abi_intr_config(int, enum intr_trigger, enum intr_polarity);
 106 static int      icu_abi_intr_cpuid(int);
 107
 108 static void     icu_abi_finalize(void);
 109 static void     icu_abi_cleanup(void);
 110 static void     icu_abi_setdefault(void);
 111 static void     icu_abi_stabilize(void);
 112 static void     icu_abi_initmap(void);
 113 static void     icu_abi_rman_setup(struct rman *);
 114
 115 struct machintr_abi MachIntrABI_ICU = {
 116         MACHINTR_ICU,
 117
 118         .intr_disable   = ICU_INTRDIS,
 119         .intr_enable    = ICU_INTREN,
 120         .intr_setup     = icu_abi_intr_setup,
 121         .intr_teardown  = icu_abi_intr_teardown,
 122         .intr_config    = icu_abi_intr_config,
 123         .intr_cpuid     = icu_abi_intr_cpuid,
 124
 125         .finalize       = icu_abi_finalize,
 126         .cleanup        = icu_abi_cleanup,
 127         .setdefault     = icu_abi_setdefault,
 128         .stabilize      = icu_abi_stabilize,
 129         .initmap        = icu_abi_initmap,
 130         .rman_setup     = icu_abi_rman_setup
 131 };
 132
 133 /*
 134  * WARNING!  SMP builds can use the ICU now so this code must be MP safe.
 135  */
 136
 137 /*
 138  * Called before interrupts are physically enabled
 139  */
 140 static void
 141 icu_abi_stabilize(void)
 142 {
 143         int intr;
 144
 145         for (intr = 0; intr < ICU_HWI_VECTORS; ++intr)
 146                 machintr_intr_disable(intr);
 147         machintr_intr_enable(ICU_IRQ_SLAVE);
 148 }
 149
 150 /*
 151  * Called after interrupts physically enabled but before the
 152  * critical section is released.
 153  */
 154 static void
 155 icu_abi_cleanup(void)
 156 {
 157         bzero(mdcpu->gd_ipending, sizeof(mdcpu->gd_ipending));
 158 }
 159
 160 /*
 161  * Called after stablize and cleanup; critical section is not
 162  * held and interrupts are not physically disabled.
 163  */
 164 static void
 165 icu_abi_finalize(void)
 166 {
 167         KKASSERT(MachIntrABI.type == MACHINTR_ICU);
 168         KKASSERT(!ioapic_enable);
 169
 170         /*
 171          * If an IMCR is present, programming bit 0 disconnects the 8259
 172          * from the BSP.  The 8259 may still be connected to LINT0 on the
 173          * BSP's LAPIC.
 174          *
 175          * If we are running SMP the LAPIC is active, try to use virtual
 176          * wire mode so we can use other interrupt sources within the LAPIC
 177          * in addition to the 8259.
 178          */
 179         if (imcr_present) {
 180                 outb(0x22, 0x70);
 181                 outb(0x23, 0x01);
 182         }
 183 }
 184
 185 static void
 186 icu_abi_intr_setup(int intr, int flags __unused)
 187 {
 188         u_long ef;
 189
 190         KKASSERT(intr >= 0 && intr < ICU_HWI_VECTORS && intr != ICU_IRQ_SLAVE);
 191
 192         ef = read_eflags();
 193         cpu_disable_intr();
 194
 195         machintr_intr_enable(intr);
 196
 197         write_eflags(ef);
 198 }
 199
 200 static void
 201 icu_abi_intr_teardown(int intr)
 202 {
 203         u_long ef;
 204
 205         KKASSERT(intr >= 0 && intr < ICU_HWI_VECTORS && intr != ICU_IRQ_SLAVE);
 206
 207         ef = read_eflags();
 208         cpu_disable_intr();
 209
 210         machintr_intr_disable(intr);
 211
 212         write_eflags(ef);
 213 }
 214
 215 static void
 216 icu_abi_setdefault(void)
 217 {
 218         int intr;
 219
 220         for (intr = 0; intr < ICU_HWI_VECTORS; ++intr) {
 221                 if (intr == ICU_IRQ_SLAVE)
 222                         continue;
 223                 setidt(IDT_OFFSET + intr, icu_intr[intr], SDT_SYS386IGT,
 224                        SEL_KPL, GSEL(GCODE_SEL, SEL_KPL));
 225         }
 226 }
 227
 228 static void
 229 icu_abi_initmap(void)
 230 {
 231         int cpu;
 232
 233         /*
 234          * NOTE: ncpus is not ready yet
 235          */
 236         for (cpu = 0; cpu < MAXCPU; ++cpu) {
 237                 int i;
 238
 239                 if (cpu != 0) {
 240                         for (i = 0; i < ICU_HWI_VECTORS; ++i)
 241                                 icu_irqmaps[cpu][i].im_type = ICU_IMT_RESERVED;
 242                 } else {
 243                         for (i = 0; i < ICU_HWI_VECTORS; ++i)
 244                                 icu_irqmaps[cpu][i].im_type = ICU_IMT_LINE;
 245                         icu_irqmaps[cpu][ICU_IRQ_SLAVE].im_type =
 246                             ICU_IMT_RESERVED;
 247
 248                         if (elcr_found) {
 249                                 for (i = 0; i < ICU_HWI_VECTORS; ++i) {
 250                                         icu_irqmaps[cpu][i].im_trig =
 251                                             elcr_read_trigger(i);
 252                                 }
 253                         } else {
 254                                 /*
 255                                  * NOTE: Trigger mode does not matter at all
 256                                  */
 257                                 for (i = 0; i < ICU_HWI_VECTORS; ++i) {
 258                                         icu_irqmaps[cpu][i].im_trig =
 259                                             INTR_TRIGGER_EDGE;
 260                                 }
 261                         }
 262                 }
 263                 icu_irqmaps[cpu][IDT_OFFSET_SYSCALL - IDT_OFFSET].im_type =
 264                     ICU_IMT_SYSCALL;
 265         }
 266 }
 267
 268 static void
 269 icu_abi_intr_config(int irq, enum intr_trigger trig,
 270     enum intr_polarity pola __unused)
 271 {
 272         struct icu_irqmap *map;
 273
 274         KKASSERT(trig == INTR_TRIGGER_EDGE || trig == INTR_TRIGGER_LEVEL);
 275
 276         KKASSERT(irq >= 0 && irq < IDT_HWI_VECTORS);
 277         map = &icu_irqmaps[0][irq];
 278
 279         KKASSERT(map->im_type == ICU_IMT_LINE);
 280
 281         /* TODO: Check whether it is configured or not */
 282
 283         if (trig == map->im_trig)
 284                 return;
 285
 286         if (bootverbose) {
 287                 kprintf("ICU: irq %d, %s -> %s\n", irq,
 288                         intr_str_trigger(map->im_trig),
 289                         intr_str_trigger(trig));
 290         }
 291         map->im_trig = trig;
 292
 293         if (!elcr_found) {
 294                 if (bootverbose)
 295                         kprintf("ICU: no ELCR, skip irq %d config\n", irq);
 296                 return;
 297         }
 298         elcr_write_trigger(irq, map->im_trig);
 299 }
 300
 301 static int
 302 icu_abi_intr_cpuid(int irq __unused)
 303 {
 304         return 0;
 305 }
 306
 307 static void
 308 icu_abi_rman_setup(struct rman *rm)
 309 {
 310         int start, end, i;
 311
 312         KASSERT(rm->rm_cpuid >= 0 && rm->rm_cpuid < MAXCPU,
 313             ("invalid rman cpuid %d", rm->rm_cpuid));
 314
 315         start = end = -1;
 316         for (i = 0; i < IDT_HWI_VECTORS; ++i) {
 317                 const struct icu_irqmap *map = &icu_irqmaps[rm->rm_cpuid][i];
 318
 319                 if (start < 0) {
 320                         if (ICU_IMT_ISHWI(map))
 321                                 start = end = i;
 322                 } else {
 323                         if (ICU_IMT_ISHWI(map)) {
 324                                 end = i;
 325                         } else {
 326                                 KKASSERT(end >= 0);
 327                                 if (bootverbose) {
 328                                         kprintf("ICU: rman cpu%d %d - %d\n",
 329                                             rm->rm_cpuid, start, end);
 330                                 }
 331                                 if (rman_manage_region(rm, start, end)) {
 332                                         panic("rman_manage_region"
 333                                             "(cpu%d %d - %d)", rm->rm_cpuid,
 334                                             start, end);
 335                                 }
 336                                 start = end = -1;
 337                         }
 338                 }
 339         }
 340         if (start >= 0) {
 341                 KKASSERT(end >= 0);
 342                 if (bootverbose) {
 343                         kprintf("ICU: rman cpu%d %d - %d\n",
 344                             rm->rm_cpuid, start, end);
 345                 }
 346                 if (rman_manage_region(rm, start, end)) {
 347                         panic("rman_manage_region(cpu%d %d - %d)",
 348                             rm->rm_cpuid, start, end);
 349                 }
 350         }
 351 }