sys/platform/pc64/icu/icu_abi.c

   1 /*
   2  * Copyright (c) 1991 The Regents of the University of California.
   3  * Copyright (c) 2005,2008 The DragonFly Project.
   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/pc64/icu/icu_abi.c,v 1.1 2008/08/29 17:07:16 dillon 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         .intr_disable   = ICU_INTRDIS,
 118         .intr_enable    = ICU_INTREN,
 119         .intr_setup     = icu_abi_intr_setup,
 120         .intr_teardown  = icu_abi_intr_teardown,
 121         .intr_config    = icu_abi_intr_config,
 122         .intr_cpuid     = icu_abi_intr_cpuid,
 123
 124         .finalize       = icu_abi_finalize,
 125         .cleanup        = icu_abi_cleanup,
 126         .setdefault     = icu_abi_setdefault,
 127         .stabilize      = icu_abi_stabilize,
 128         .initmap        = icu_abi_initmap,
 129         .rman_setup     = icu_abi_rman_setup
 130 };
 131
 132 /*
 133  * WARNING!  SMP builds can use the ICU now so this code must be MP safe.
 134  */
 135
 136 /*
 137  * Called before interrupts are physically enabled
 138  */
 139 static void
 140 icu_abi_stabilize(void)
 141 {
 142         int intr;
 143
 144         for (intr = 0; intr < ICU_HWI_VECTORS; ++intr)
 145                 machintr_intr_disable(intr);
 146         machintr_intr_enable(ICU_IRQ_SLAVE);
 147 }
 148
 149 /*
 150  * Called after interrupts physically enabled but before the
 151  * critical section is released.
 152  */
 153 static void
 154 icu_abi_cleanup(void)
 155 {
 156         bzero(mdcpu->gd_ipending, sizeof(mdcpu->gd_ipending));
 157 }
 158
 159 /*
 160  * Called after stablize and cleanup; critical section is not
 161  * held and interrupts are not physically disabled.
 162  */
 163 static void
 164 icu_abi_finalize(void)
 165 {
 166         KKASSERT(MachIntrABI.type == MACHINTR_ICU);
 167         KKASSERT(!ioapic_enable);
 168
 169         /*
 170          * If an IMCR is present, programming bit 0 disconnects the 8259
 171          * from the BSP.  The 8259 may still be connected to LINT0 on the
 172          * BSP's LAPIC.
 173          *
 174          * If we are running SMP the LAPIC is active, try to use virtual
 175          * wire mode so we can use other interrupt sources within the LAPIC
 176          * in addition to the 8259.
 177          */
 178         if (imcr_present) {
 179                 outb(0x22, 0x70);
 180                 outb(0x23, 0x01);
 181         }
 182 }
 183
 184 static void
 185 icu_abi_intr_setup(int intr, int flags)
 186 {
 187         register_t ef;
 188
 189         KKASSERT(intr >= 0 && intr < ICU_HWI_VECTORS && intr != ICU_IRQ_SLAVE);
 190
 191         ef = read_rflags();
 192         cpu_disable_intr();
 193
 194         machintr_intr_enable(intr);
 195
 196         write_rflags(ef);
 197 }
 198
 199 static void
 200 icu_abi_intr_teardown(int intr)
 201 {
 202         register_t ef;
 203
 204         KKASSERT(intr >= 0 && intr < ICU_HWI_VECTORS && intr != ICU_IRQ_SLAVE);
 205
 206         ef = read_rflags();
 207         cpu_disable_intr();
 208
 209         machintr_intr_disable(intr);
 210
 211         write_rflags(ef);
 212 }
 213
 214 static void
 215 icu_abi_setdefault(void)
 216 {
 217         int intr;
 218
 219         for (intr = 0; intr < ICU_HWI_VECTORS; ++intr) {
 220                 if (intr == ICU_IRQ_SLAVE)
 221                         continue;
 222                 setidt(IDT_OFFSET + intr, icu_intr[intr], SDT_SYSIGT,
 223                        SEL_KPL, 0);
 224         }
 225 }
 226
 227 static void
 228 icu_abi_initmap(void)
 229 {
 230         int cpu;
 231
 232         /*
 233          * NOTE: ncpus is not ready yet
 234          */
 235         for (cpu = 0; cpu < MAXCPU; ++cpu) {
 236                 int i;
 237
 238                 if (cpu != 0) {
 239                         for (i = 0; i < ICU_HWI_VECTORS; ++i)
 240                                 icu_irqmaps[cpu][i].im_type = ICU_IMT_RESERVED;
 241                 } else {
 242                         for (i = 0; i < ICU_HWI_VECTORS; ++i)
 243                                 icu_irqmaps[cpu][i].im_type = ICU_IMT_LINE;
 244                         icu_irqmaps[cpu][ICU_IRQ_SLAVE].im_type =
 245                             ICU_IMT_RESERVED;
 246
 247                         if (elcr_found) {
 248                                 for (i = 0; i < ICU_HWI_VECTORS; ++i) {
 249                                         icu_irqmaps[cpu][i].im_trig =
 250                                             elcr_read_trigger(i);
 251                                 }
 252                         } else {
 253                                 /*
 254                                  * NOTE: Trigger mode does not matter at all
 255                                  */
 256                                 for (i = 0; i < ICU_HWI_VECTORS; ++i) {
 257                                         icu_irqmaps[cpu][i].im_trig =
 258                                             INTR_TRIGGER_EDGE;
 259                                 }
 260                         }
 261                 }
 262                 icu_irqmaps[cpu][IDT_OFFSET_SYSCALL - IDT_OFFSET].im_type =
 263                     ICU_IMT_SYSCALL;
 264         }
 265 }
 266
 267 static void
 268 icu_abi_intr_config(int irq, enum intr_trigger trig,
 269     enum intr_polarity pola __unused)
 270 {
 271         struct icu_irqmap *map;
 272
 273         KKASSERT(trig == INTR_TRIGGER_EDGE || trig == INTR_TRIGGER_LEVEL);
 274
 275         KKASSERT(irq >= 0 && irq < IDT_HWI_VECTORS);
 276         map = &icu_irqmaps[0][irq];
 277
 278         KKASSERT(map->im_type == ICU_IMT_LINE);
 279
 280         /* TODO: Check whether it is configured or not */
 281
 282         if (trig == map->im_trig)
 283                 return;
 284
 285         if (bootverbose) {
 286                 kprintf("ICU: irq %d, %s -> %s\n", irq,
 287                         intr_str_trigger(map->im_trig),
 288                         intr_str_trigger(trig));
 289         }
 290         map->im_trig = trig;
 291
 292         if (!elcr_found) {
 293                 if (bootverbose)
 294                         kprintf("ICU: no ELCR, skip irq %d config\n", irq);
 295                 return;
 296         }
 297         elcr_write_trigger(irq, map->im_trig);
 298 }
 299
 300 static int
 301 icu_abi_intr_cpuid(int irq __unused)
 302 {
 303         return 0;
 304 }
 305
 306 static void
 307 icu_abi_rman_setup(struct rman *rm)
 308 {
 309         int start, end, i;
 310
 311         KASSERT(rm->rm_cpuid >= 0 && rm->rm_cpuid < MAXCPU,
 312             ("invalid rman cpuid %d", rm->rm_cpuid));
 313
 314         start = end = -1;
 315         for (i = 0; i < IDT_HWI_VECTORS; ++i) {
 316                 const struct icu_irqmap *map = &icu_irqmaps[rm->rm_cpuid][i];
 317
 318                 if (start < 0) {
 319                         if (ICU_IMT_ISHWI(map))
 320                                 start = end = i;
 321                 } else {
 322                         if (ICU_IMT_ISHWI(map)) {
 323                                 end = i;
 324                         } else {
 325                                 KKASSERT(end >= 0);
 326                                 if (bootverbose) {
 327                                         kprintf("ICU: rman cpu%d %d - %d\n",
 328                                             rm->rm_cpuid, start, end);
 329                                 }
 330                                 if (rman_manage_region(rm, start, end)) {
 331                                         panic("rman_manage_region"
 332                                             "(cpu%d %d - %d)", rm->rm_cpuid,
 333                                             start, end);
 334                                 }
 335                                 start = end = -1;
 336                         }
 337                 }
 338         }
 339         if (start >= 0) {
 340                 KKASSERT(end >= 0);
 341                 if (bootverbose) {
 342                         kprintf("ICU: rman cpu%d %d - %d\n",
 343                             rm->rm_cpuid, start, end);
 344                 }
 345                 if (rman_manage_region(rm, start, end)) {
 346                         panic("rman_manage_region(cpu%d %d - %d)",
 347                             rm->rm_cpuid, start, end);
 348                 }
 349         }
 350 }