hw/intc/exynos4210_gic.c

   1 /*
   2  * Samsung exynos4210 GIC implementation. Based on hw/arm_gic.c
   3  *
   4  * Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd.
   5  * All rights reserved.
   6  *
   7  * Evgeny Voevodin <e.voevodin@samsung.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the
  11  * Free Software Foundation; either version 2 of the License, or (at your
  12  * option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  17  * See the GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23 #include "qemu/osdep.h"
  24 #include "hw/sysbus.h"
  25 #include "migration/vmstate.h"
  26 #include "qemu/module.h"
  27 #include "hw/irq.h"
  28 #include "hw/qdev-properties.h"
  29 #include "hw/arm/exynos4210.h"
  30
  31 enum ExtGicId {
  32     EXT_GIC_ID_MDMA_LCD0 = 66,
  33     EXT_GIC_ID_PDMA0,
  34     EXT_GIC_ID_PDMA1,
  35     EXT_GIC_ID_TIMER0,
  36     EXT_GIC_ID_TIMER1,
  37     EXT_GIC_ID_TIMER2,
  38     EXT_GIC_ID_TIMER3,
  39     EXT_GIC_ID_TIMER4,
  40     EXT_GIC_ID_MCT_L0,
  41     EXT_GIC_ID_WDT,
  42     EXT_GIC_ID_RTC_ALARM,
  43     EXT_GIC_ID_RTC_TIC,
  44     EXT_GIC_ID_GPIO_XB,
  45     EXT_GIC_ID_GPIO_XA,
  46     EXT_GIC_ID_MCT_L1,
  47     EXT_GIC_ID_IEM_APC,
  48     EXT_GIC_ID_IEM_IEC,
  49     EXT_GIC_ID_NFC,
  50     EXT_GIC_ID_UART0,
  51     EXT_GIC_ID_UART1,
  52     EXT_GIC_ID_UART2,
  53     EXT_GIC_ID_UART3,
  54     EXT_GIC_ID_UART4,
  55     EXT_GIC_ID_MCT_G0,
  56     EXT_GIC_ID_I2C0,
  57     EXT_GIC_ID_I2C1,
  58     EXT_GIC_ID_I2C2,
  59     EXT_GIC_ID_I2C3,
  60     EXT_GIC_ID_I2C4,
  61     EXT_GIC_ID_I2C5,
  62     EXT_GIC_ID_I2C6,
  63     EXT_GIC_ID_I2C7,
  64     EXT_GIC_ID_SPI0,
  65     EXT_GIC_ID_SPI1,
  66     EXT_GIC_ID_SPI2,
  67     EXT_GIC_ID_MCT_G1,
  68     EXT_GIC_ID_USB_HOST,
  69     EXT_GIC_ID_USB_DEVICE,
  70     EXT_GIC_ID_MODEMIF,
  71     EXT_GIC_ID_HSMMC0,
  72     EXT_GIC_ID_HSMMC1,
  73     EXT_GIC_ID_HSMMC2,
  74     EXT_GIC_ID_HSMMC3,
  75     EXT_GIC_ID_SDMMC,
  76     EXT_GIC_ID_MIPI_CSI_4LANE,
  77     EXT_GIC_ID_MIPI_DSI_4LANE,
  78     EXT_GIC_ID_MIPI_CSI_2LANE,
  79     EXT_GIC_ID_MIPI_DSI_2LANE,
  80     EXT_GIC_ID_ONENAND_AUDI,
  81     EXT_GIC_ID_ROTATOR,
  82     EXT_GIC_ID_FIMC0,
  83     EXT_GIC_ID_FIMC1,
  84     EXT_GIC_ID_FIMC2,
  85     EXT_GIC_ID_FIMC3,
  86     EXT_GIC_ID_JPEG,
  87     EXT_GIC_ID_2D,
  88     EXT_GIC_ID_PCIe,
  89     EXT_GIC_ID_MIXER,
  90     EXT_GIC_ID_HDMI,
  91     EXT_GIC_ID_HDMI_I2C,
  92     EXT_GIC_ID_MFC,
  93     EXT_GIC_ID_TVENC,
  94 };
  95
  96 enum ExtInt {
  97     EXT_GIC_ID_EXTINT0 = 48,
  98     EXT_GIC_ID_EXTINT1,
  99     EXT_GIC_ID_EXTINT2,
 100     EXT_GIC_ID_EXTINT3,
 101     EXT_GIC_ID_EXTINT4,
 102     EXT_GIC_ID_EXTINT5,
 103     EXT_GIC_ID_EXTINT6,
 104     EXT_GIC_ID_EXTINT7,
 105     EXT_GIC_ID_EXTINT8,
 106     EXT_GIC_ID_EXTINT9,
 107     EXT_GIC_ID_EXTINT10,
 108     EXT_GIC_ID_EXTINT11,
 109     EXT_GIC_ID_EXTINT12,
 110     EXT_GIC_ID_EXTINT13,
 111     EXT_GIC_ID_EXTINT14,
 112     EXT_GIC_ID_EXTINT15
 113 };
 114
 115 /*
 116  * External GIC sources which are not from External Interrupt Combiner or
 117  * External Interrupts are starting from EXYNOS4210_MAX_EXT_COMBINER_OUT_IRQ,
 118  * which is INTG16 in Internal Interrupt Combiner.
 119  */
 120
 121 static const uint32_t
 122 combiner_grp_to_gic_id[64-EXYNOS4210_MAX_EXT_COMBINER_OUT_IRQ][8] = {
 123     /* int combiner groups 16-19 */
 124     { }, { }, { }, { },
 125     /* int combiner group 20 */
 126     { 0, EXT_GIC_ID_MDMA_LCD0 },
 127     /* int combiner group 21 */
 128     { EXT_GIC_ID_PDMA0, EXT_GIC_ID_PDMA1 },
 129     /* int combiner group 22 */
 130     { EXT_GIC_ID_TIMER0, EXT_GIC_ID_TIMER1, EXT_GIC_ID_TIMER2,
 131             EXT_GIC_ID_TIMER3, EXT_GIC_ID_TIMER4 },
 132     /* int combiner group 23 */
 133     { EXT_GIC_ID_RTC_ALARM, EXT_GIC_ID_RTC_TIC },
 134     /* int combiner group 24 */
 135     { EXT_GIC_ID_GPIO_XB, EXT_GIC_ID_GPIO_XA },
 136     /* int combiner group 25 */
 137     { EXT_GIC_ID_IEM_APC, EXT_GIC_ID_IEM_IEC },
 138     /* int combiner group 26 */
 139     { EXT_GIC_ID_UART0, EXT_GIC_ID_UART1, EXT_GIC_ID_UART2, EXT_GIC_ID_UART3,
 140             EXT_GIC_ID_UART4 },
 141     /* int combiner group 27 */
 142     { EXT_GIC_ID_I2C0, EXT_GIC_ID_I2C1, EXT_GIC_ID_I2C2, EXT_GIC_ID_I2C3,
 143             EXT_GIC_ID_I2C4, EXT_GIC_ID_I2C5, EXT_GIC_ID_I2C6,
 144             EXT_GIC_ID_I2C7 },
 145     /* int combiner group 28 */
 146     { EXT_GIC_ID_SPI0, EXT_GIC_ID_SPI1, EXT_GIC_ID_SPI2 , EXT_GIC_ID_USB_HOST},
 147     /* int combiner group 29 */
 148     { EXT_GIC_ID_HSMMC0, EXT_GIC_ID_HSMMC1, EXT_GIC_ID_HSMMC2,
 149      EXT_GIC_ID_HSMMC3, EXT_GIC_ID_SDMMC },
 150     /* int combiner group 30 */
 151     { EXT_GIC_ID_MIPI_CSI_4LANE, EXT_GIC_ID_MIPI_CSI_2LANE },
 152     /* int combiner group 31 */
 153     { EXT_GIC_ID_MIPI_DSI_4LANE, EXT_GIC_ID_MIPI_DSI_2LANE },
 154     /* int combiner group 32 */
 155     { EXT_GIC_ID_FIMC0, EXT_GIC_ID_FIMC1 },
 156     /* int combiner group 33 */
 157     { EXT_GIC_ID_FIMC2, EXT_GIC_ID_FIMC3 },
 158     /* int combiner group 34 */
 159     { EXT_GIC_ID_ONENAND_AUDI, EXT_GIC_ID_NFC },
 160     /* int combiner group 35 */
 161     { 0, 0, 0, EXT_GIC_ID_MCT_L1, EXT_GIC_ID_MCT_G0, EXT_GIC_ID_MCT_G1 },
 162     /* int combiner group 36 */
 163     { EXT_GIC_ID_MIXER },
 164     /* int combiner group 37 */
 165     { EXT_GIC_ID_EXTINT4, EXT_GIC_ID_EXTINT5, EXT_GIC_ID_EXTINT6,
 166      EXT_GIC_ID_EXTINT7 },
 167     /* groups 38-50 */
 168     { }, { }, { }, { }, { }, { }, { }, { }, { }, { }, { }, { }, { },
 169     /* int combiner group 51 */
 170     { EXT_GIC_ID_MCT_L0, 0, 0, 0, EXT_GIC_ID_MCT_G0, EXT_GIC_ID_MCT_G1 },
 171     /* group 52 */
 172     { },
 173     /* int combiner group 53 */
 174     { EXT_GIC_ID_WDT, 0, 0, 0, EXT_GIC_ID_MCT_G0, EXT_GIC_ID_MCT_G1 },
 175     /* groups 54-63 */
 176     { }, { }, { }, { }, { }, { }, { }, { }, { }, { }
 177 };
 178
 179 #define EXYNOS4210_GIC_NIRQ 160
 180
 181 #define EXYNOS4210_EXT_GIC_CPU_REGION_SIZE     0x10000
 182 #define EXYNOS4210_EXT_GIC_DIST_REGION_SIZE    0x10000
 183
 184 #define EXYNOS4210_EXT_GIC_PER_CPU_OFFSET      0x8000
 185 #define EXYNOS4210_EXT_GIC_CPU_GET_OFFSET(n) \
 186     ((n) * EXYNOS4210_EXT_GIC_PER_CPU_OFFSET)
 187 #define EXYNOS4210_EXT_GIC_DIST_GET_OFFSET(n) \
 188     ((n) * EXYNOS4210_EXT_GIC_PER_CPU_OFFSET)
 189
 190 #define EXYNOS4210_GIC_CPU_REGION_SIZE  0x100
 191 #define EXYNOS4210_GIC_DIST_REGION_SIZE 0x1000
 192
 193 static void exynos4210_irq_handler(void *opaque, int irq, int level)
 194 {
 195     Exynos4210Irq *s = (Exynos4210Irq *)opaque;
 196
 197     /* Bypass */
 198     qemu_set_irq(s->board_irqs[irq], level);
 199 }
 200
 201 /*
 202  * Initialize exynos4210 IRQ subsystem stub.
 203  */
 204 qemu_irq *exynos4210_init_irq(Exynos4210Irq *s)
 205 {
 206     return qemu_allocate_irqs(exynos4210_irq_handler, s,
 207             EXYNOS4210_MAX_INT_COMBINER_IN_IRQ);
 208 }
 209
 210 /*
 211  * Initialize board IRQs.
 212  * These IRQs contain splitted Int/External Combiner and External Gic IRQs.
 213  */
 214 void exynos4210_init_board_irqs(Exynos4210Irq *s)
 215 {
 216     uint32_t grp, bit, irq_id, n;
 217
 218     for (n = 0; n < EXYNOS4210_MAX_EXT_COMBINER_IN_IRQ; n++) {
 219         irq_id = 0;
 220         if (n == EXYNOS4210_COMBINER_GET_IRQ_NUM(1, 4) ||
 221                 n == EXYNOS4210_COMBINER_GET_IRQ_NUM(12, 4)) {
 222             /* MCT_G0 is passed to External GIC */
 223             irq_id = EXT_GIC_ID_MCT_G0;
 224         }
 225         if (n == EXYNOS4210_COMBINER_GET_IRQ_NUM(1, 5) ||
 226                 n == EXYNOS4210_COMBINER_GET_IRQ_NUM(12, 5)) {
 227             /* MCT_G1 is passed to External and GIC */
 228             irq_id = EXT_GIC_ID_MCT_G1;
 229         }
 230         if (irq_id) {
 231             s->board_irqs[n] = qemu_irq_split(s->int_combiner_irq[n],
 232                     s->ext_gic_irq[irq_id-32]);
 233         } else {
 234             s->board_irqs[n] = qemu_irq_split(s->int_combiner_irq[n],
 235                     s->ext_combiner_irq[n]);
 236         }
 237     }
 238     for (; n < EXYNOS4210_MAX_INT_COMBINER_IN_IRQ; n++) {
 239         /* these IDs are passed to Internal Combiner and External GIC */
 240         grp = EXYNOS4210_COMBINER_GET_GRP_NUM(n);
 241         bit = EXYNOS4210_COMBINER_GET_BIT_NUM(n);
 242         irq_id = combiner_grp_to_gic_id[grp -
 243                      EXYNOS4210_MAX_EXT_COMBINER_OUT_IRQ][bit];
 244
 245         if (irq_id) {
 246             s->board_irqs[n] = qemu_irq_split(s->int_combiner_irq[n],
 247                     s->ext_gic_irq[irq_id-32]);
 248         }
 249     }
 250 }
 251
 252 /*
 253  * Get IRQ number from exynos4210 IRQ subsystem stub.
 254  * To identify IRQ source use internal combiner group and bit number
 255  *  grp - group number
 256  *  bit - bit number inside group
 257  */
 258 uint32_t exynos4210_get_irq(uint32_t grp, uint32_t bit)
 259 {
 260     return EXYNOS4210_COMBINER_GET_IRQ_NUM(grp, bit);
 261 }
 262
 263 /********* GIC part *********/
 264
 265 #define TYPE_EXYNOS4210_GIC "exynos4210.gic"
 266 #define EXYNOS4210_GIC(obj) \
 267     OBJECT_CHECK(Exynos4210GicState, (obj), TYPE_EXYNOS4210_GIC)
 268
 269 typedef struct {
 270     SysBusDevice parent_obj;
 271
 272     MemoryRegion cpu_container;
 273     MemoryRegion dist_container;
 274     MemoryRegion cpu_alias[EXYNOS4210_NCPUS];
 275     MemoryRegion dist_alias[EXYNOS4210_NCPUS];
 276     uint32_t num_cpu;
 277     DeviceState *gic;
 278 } Exynos4210GicState;
 279
 280 static void exynos4210_gic_set_irq(void *opaque, int irq, int level)
 281 {
 282     Exynos4210GicState *s = (Exynos4210GicState *)opaque;
 283     qemu_set_irq(qdev_get_gpio_in(s->gic, irq), level);
 284 }
 285
 286 static void exynos4210_gic_realize(DeviceState *dev, Error **errp)
 287 {
 288     Object *obj = OBJECT(dev);
 289     Exynos4210GicState *s = EXYNOS4210_GIC(obj);
 290     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
 291     const char cpu_prefix[] = "exynos4210-gic-alias_cpu";
 292     const char dist_prefix[] = "exynos4210-gic-alias_dist";
 293     char cpu_alias_name[sizeof(cpu_prefix) + 3];
 294     char dist_alias_name[sizeof(cpu_prefix) + 3];
 295     SysBusDevice *gicbusdev;
 296     uint32_t n = s->num_cpu;
 297     uint32_t i;
 298
 299     s->gic = qdev_create(NULL, "arm_gic");
 300     qdev_prop_set_uint32(s->gic, "num-cpu", s->num_cpu);
 301     qdev_prop_set_uint32(s->gic, "num-irq", EXYNOS4210_GIC_NIRQ);
 302     qdev_init_nofail(s->gic);
 303     gicbusdev = SYS_BUS_DEVICE(s->gic);
 304
 305     /* Pass through outbound IRQ lines from the GIC */
 306     sysbus_pass_irq(sbd, gicbusdev);
 307
 308     /* Pass through inbound GPIO lines to the GIC */
 309     qdev_init_gpio_in(dev, exynos4210_gic_set_irq,
 310                       EXYNOS4210_GIC_NIRQ - 32);
 311
 312     memory_region_init(&s->cpu_container, obj, "exynos4210-cpu-container",
 313             EXYNOS4210_EXT_GIC_CPU_REGION_SIZE);
 314     memory_region_init(&s->dist_container, obj, "exynos4210-dist-container",
 315             EXYNOS4210_EXT_GIC_DIST_REGION_SIZE);
 316
 317     /*
 318      * This clues in gcc that our on-stack buffers do, in fact have
 319      * enough room for the cpu numbers.  gcc 9.2.1 on 32-bit x86
 320      * doesn't figure this out, otherwise and gives spurious warnings.
 321      */
 322     assert(n <= EXYNOS4210_NCPUS);
 323     for (i = 0; i < n; i++) {
 324         /* Map CPU interface per SMP Core */
 325         sprintf(cpu_alias_name, "%s%x", cpu_prefix, i);
 326         memory_region_init_alias(&s->cpu_alias[i], obj,
 327                                  cpu_alias_name,
 328                                  sysbus_mmio_get_region(gicbusdev, 1),
 329                                  0,
 330                                  EXYNOS4210_GIC_CPU_REGION_SIZE);
 331         memory_region_add_subregion(&s->cpu_container,
 332                 EXYNOS4210_EXT_GIC_CPU_GET_OFFSET(i), &s->cpu_alias[i]);
 333
 334         /* Map Distributor per SMP Core */
 335         sprintf(dist_alias_name, "%s%x", dist_prefix, i);
 336         memory_region_init_alias(&s->dist_alias[i], obj,
 337                                  dist_alias_name,
 338                                  sysbus_mmio_get_region(gicbusdev, 0),
 339                                  0,
 340                                  EXYNOS4210_GIC_DIST_REGION_SIZE);
 341         memory_region_add_subregion(&s->dist_container,
 342                 EXYNOS4210_EXT_GIC_DIST_GET_OFFSET(i), &s->dist_alias[i]);
 343     }
 344
 345     sysbus_init_mmio(sbd, &s->cpu_container);
 346     sysbus_init_mmio(sbd, &s->dist_container);
 347 }
 348
 349 static Property exynos4210_gic_properties[] = {
 350     DEFINE_PROP_UINT32("num-cpu", Exynos4210GicState, num_cpu, 1),
 351     DEFINE_PROP_END_OF_LIST(),
 352 };
 353
 354 static void exynos4210_gic_class_init(ObjectClass *klass, void *data)
 355 {
 356     DeviceClass *dc = DEVICE_CLASS(klass);
 357
 358     device_class_set_props(dc, exynos4210_gic_properties);
 359     dc->realize = exynos4210_gic_realize;
 360 }
 361
 362 static const TypeInfo exynos4210_gic_info = {
 363     .name          = TYPE_EXYNOS4210_GIC,
 364     .parent        = TYPE_SYS_BUS_DEVICE,
 365     .instance_size = sizeof(Exynos4210GicState),
 366     .class_init    = exynos4210_gic_class_init,
 367 };
 368
 369 static void exynos4210_gic_register_types(void)
 370 {
 371     type_register_static(&exynos4210_gic_info);
 372 }
 373
 374 type_init(exynos4210_gic_register_types)
 375
 376 /* IRQ OR Gate struct.
 377  *
 378  * This device models an OR gate. There are n_in input qdev gpio lines and one
 379  * output sysbus IRQ line. The output IRQ level is formed as OR between all
 380  * gpio inputs.
 381  */
 382
 383 #define TYPE_EXYNOS4210_IRQ_GATE "exynos4210.irq_gate"
 384 #define EXYNOS4210_IRQ_GATE(obj) \
 385     OBJECT_CHECK(Exynos4210IRQGateState, (obj), TYPE_EXYNOS4210_IRQ_GATE)
 386
 387 typedef struct Exynos4210IRQGateState {
 388     SysBusDevice parent_obj;
 389
 390     uint32_t n_in;      /* inputs amount */
 391     uint32_t *level;    /* input levels */
 392     qemu_irq out;       /* output IRQ */
 393 } Exynos4210IRQGateState;
 394
 395 static Property exynos4210_irq_gate_properties[] = {
 396     DEFINE_PROP_UINT32("n_in", Exynos4210IRQGateState, n_in, 1),
 397     DEFINE_PROP_END_OF_LIST(),
 398 };
 399
 400 static const VMStateDescription vmstate_exynos4210_irq_gate = {
 401     .name = "exynos4210.irq_gate",
 402     .version_id = 2,
 403     .minimum_version_id = 2,
 404     .fields = (VMStateField[]) {
 405         VMSTATE_VBUFFER_UINT32(level, Exynos4210IRQGateState, 1, NULL, n_in),
 406         VMSTATE_END_OF_LIST()
 407     }
 408 };
 409
 410 /* Process a change in IRQ input. */
 411 static void exynos4210_irq_gate_handler(void *opaque, int irq, int level)
 412 {
 413     Exynos4210IRQGateState *s = (Exynos4210IRQGateState *)opaque;
 414     uint32_t i;
 415
 416     assert(irq < s->n_in);
 417
 418     s->level[irq] = level;
 419
 420     for (i = 0; i < s->n_in; i++) {
 421         if (s->level[i] >= 1) {
 422             qemu_irq_raise(s->out);
 423             return;
 424         }
 425     }
 426
 427     qemu_irq_lower(s->out);
 428 }
 429
 430 static void exynos4210_irq_gate_reset(DeviceState *d)
 431 {
 432     Exynos4210IRQGateState *s = EXYNOS4210_IRQ_GATE(d);
 433
 434     memset(s->level, 0, s->n_in * sizeof(*s->level));
 435 }
 436
 437 /*
 438  * IRQ Gate initialization.
 439  */
 440 static void exynos4210_irq_gate_init(Object *obj)
 441 {
 442     Exynos4210IRQGateState *s = EXYNOS4210_IRQ_GATE(obj);
 443     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
 444
 445     sysbus_init_irq(sbd, &s->out);
 446 }
 447
 448 static void exynos4210_irq_gate_realize(DeviceState *dev, Error **errp)
 449 {
 450     Exynos4210IRQGateState *s = EXYNOS4210_IRQ_GATE(dev);
 451
 452     /* Allocate general purpose input signals and connect a handler to each of
 453      * them */
 454     qdev_init_gpio_in(dev, exynos4210_irq_gate_handler, s->n_in);
 455
 456     s->level = g_malloc0(s->n_in * sizeof(*s->level));
 457 }
 458
 459 static void exynos4210_irq_gate_class_init(ObjectClass *klass, void *data)
 460 {
 461     DeviceClass *dc = DEVICE_CLASS(klass);
 462
 463     dc->reset = exynos4210_irq_gate_reset;
 464     dc->vmsd = &vmstate_exynos4210_irq_gate;
 465     device_class_set_props(dc, exynos4210_irq_gate_properties);
 466     dc->realize = exynos4210_irq_gate_realize;
 467 }
 468
 469 static const TypeInfo exynos4210_irq_gate_info = {
 470     .name          = TYPE_EXYNOS4210_IRQ_GATE,
 471     .parent        = TYPE_SYS_BUS_DEVICE,
 472     .instance_size = sizeof(Exynos4210IRQGateState),
 473     .instance_init = exynos4210_irq_gate_init,
 474     .class_init    = exynos4210_irq_gate_class_init,
 475 };
 476
 477 static void exynos4210_irq_gate_register_types(void)
 478 {
 479     type_register_static(&exynos4210_irq_gate_info);
 480 }
 481
 482 type_init(exynos4210_irq_gate_register_types)