hw/misc/eccmemctl.c

   1 /*
   2  * QEMU Sparc Sun4m ECC memory controller emulation
   3  *
   4  * Copyright (c) 2007 Robert Reif
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include "qemu/osdep.h"
  26 #include "hw/sysbus.h"
  27 #include "qemu/module.h"
  28 #include "trace.h"
  29
  30 /* There are 3 versions of this chip used in SMP sun4m systems:
  31  * MCC (version 0, implementation 0) SS-600MP
  32  * EMC (version 0, implementation 1) SS-10
  33  * SMC (version 0, implementation 2) SS-10SX and SS-20
  34  *
  35  * Chipset docs:
  36  * "Sun-4M System Architecture (revision 2.0) by Chuck Narad", 950-1373-01,
  37  * http://mediacast.sun.com/users/Barton808/media/Sun4M_SystemArchitecture_edited2.pdf
  38  */
  39
  40 #define ECC_MCC        0x00000000
  41 #define ECC_EMC        0x10000000
  42 #define ECC_SMC        0x20000000
  43
  44 /* Register indexes */
  45 #define ECC_MER        0               /* Memory Enable Register */
  46 #define ECC_MDR        1               /* Memory Delay Register */
  47 #define ECC_MFSR       2               /* Memory Fault Status Register */
  48 #define ECC_VCR        3               /* Video Configuration Register */
  49 #define ECC_MFAR0      4               /* Memory Fault Address Register 0 */
  50 #define ECC_MFAR1      5               /* Memory Fault Address Register 1 */
  51 #define ECC_DR         6               /* Diagnostic Register */
  52 #define ECC_ECR0       7               /* Event Count Register 0 */
  53 #define ECC_ECR1       8               /* Event Count Register 1 */
  54
  55 /* ECC fault control register */
  56 #define ECC_MER_EE     0x00000001      /* Enable ECC checking */
  57 #define ECC_MER_EI     0x00000002      /* Enable Interrupts on
  58                                           correctable errors */
  59 #define ECC_MER_MRR0   0x00000004      /* SIMM 0 */
  60 #define ECC_MER_MRR1   0x00000008      /* SIMM 1 */
  61 #define ECC_MER_MRR2   0x00000010      /* SIMM 2 */
  62 #define ECC_MER_MRR3   0x00000020      /* SIMM 3 */
  63 #define ECC_MER_MRR4   0x00000040      /* SIMM 4 */
  64 #define ECC_MER_MRR5   0x00000080      /* SIMM 5 */
  65 #define ECC_MER_MRR6   0x00000100      /* SIMM 6 */
  66 #define ECC_MER_MRR7   0x00000200      /* SIMM 7 */
  67 #define ECC_MER_REU    0x00000100      /* Memory Refresh Enable (600MP) */
  68 #define ECC_MER_MRR    0x000003fc      /* MRR mask */
  69 #define ECC_MER_A      0x00000400      /* Memory controller addr map select */
  70 #define ECC_MER_DCI    0x00000800      /* Disables Coherent Invalidate ACK */
  71 #define ECC_MER_VER    0x0f000000      /* Version */
  72 #define ECC_MER_IMPL   0xf0000000      /* Implementation */
  73 #define ECC_MER_MASK_0 0x00000103      /* Version 0 (MCC) mask */
  74 #define ECC_MER_MASK_1 0x00000bff      /* Version 1 (EMC) mask */
  75 #define ECC_MER_MASK_2 0x00000bff      /* Version 2 (SMC) mask */
  76
  77 /* ECC memory delay register */
  78 #define ECC_MDR_RRI    0x000003ff      /* Refresh Request Interval */
  79 #define ECC_MDR_MI     0x00001c00      /* MIH Delay */
  80 #define ECC_MDR_CI     0x0000e000      /* Coherent Invalidate Delay */
  81 #define ECC_MDR_MDL    0x001f0000      /* MBus Master arbitration delay */
  82 #define ECC_MDR_MDH    0x03e00000      /* MBus Master arbitration delay */
  83 #define ECC_MDR_GAD    0x7c000000      /* Graphics Arbitration Delay */
  84 #define ECC_MDR_RSC    0x80000000      /* Refresh load control */
  85 #define ECC_MDR_MASK   0x7fffffff
  86
  87 /* ECC fault status register */
  88 #define ECC_MFSR_CE    0x00000001      /* Correctable error */
  89 #define ECC_MFSR_BS    0x00000002      /* C2 graphics bad slot access */
  90 #define ECC_MFSR_TO    0x00000004      /* Timeout on write */
  91 #define ECC_MFSR_UE    0x00000008      /* Uncorrectable error */
  92 #define ECC_MFSR_DW    0x000000f0      /* Index of double word in block */
  93 #define ECC_MFSR_SYND  0x0000ff00      /* Syndrome for correctable error */
  94 #define ECC_MFSR_ME    0x00010000      /* Multiple errors */
  95 #define ECC_MFSR_C2ERR 0x00020000      /* C2 graphics error */
  96
  97 /* ECC fault address register 0 */
  98 #define ECC_MFAR0_PADDR 0x0000000f     /* PA[32-35] */
  99 #define ECC_MFAR0_TYPE  0x000000f0     /* Transaction type */
 100 #define ECC_MFAR0_SIZE  0x00000700     /* Transaction size */
 101 #define ECC_MFAR0_CACHE 0x00000800     /* Mapped cacheable */
 102 #define ECC_MFAR0_LOCK  0x00001000     /* Error occurred in atomic cycle */
 103 #define ECC_MFAR0_BMODE 0x00002000     /* Boot mode */
 104 #define ECC_MFAR0_VADDR 0x003fc000     /* VA[12-19] (superset bits) */
 105 #define ECC_MFAR0_S     0x08000000     /* Supervisor mode */
 106 #define ECC_MFARO_MID   0xf0000000     /* Module ID */
 107
 108 /* ECC diagnostic register */
 109 #define ECC_DR_CBX     0x00000001
 110 #define ECC_DR_CB0     0x00000002
 111 #define ECC_DR_CB1     0x00000004
 112 #define ECC_DR_CB2     0x00000008
 113 #define ECC_DR_CB4     0x00000010
 114 #define ECC_DR_CB8     0x00000020
 115 #define ECC_DR_CB16    0x00000040
 116 #define ECC_DR_CB32    0x00000080
 117 #define ECC_DR_DMODE   0x00000c00
 118
 119 #define ECC_NREGS      9
 120 #define ECC_SIZE       (ECC_NREGS * sizeof(uint32_t))
 121
 122 #define ECC_DIAG_SIZE  4
 123 #define ECC_DIAG_MASK  (ECC_DIAG_SIZE - 1)
 124
 125 #define TYPE_ECC_MEMCTL "eccmemctl"
 126 #define ECC_MEMCTL(obj) OBJECT_CHECK(ECCState, (obj), TYPE_ECC_MEMCTL)
 127
 128 typedef struct ECCState {
 129     SysBusDevice parent_obj;
 130
 131     MemoryRegion iomem, iomem_diag;
 132     qemu_irq irq;
 133     uint32_t regs[ECC_NREGS];
 134     uint8_t diag[ECC_DIAG_SIZE];
 135     uint32_t version;
 136 } ECCState;
 137
 138 static void ecc_mem_write(void *opaque, hwaddr addr, uint64_t val,
 139                           unsigned size)
 140 {
 141     ECCState *s = opaque;
 142
 143     switch (addr >> 2) {
 144     case ECC_MER:
 145         if (s->version == ECC_MCC)
 146             s->regs[ECC_MER] = (val & ECC_MER_MASK_0);
 147         else if (s->version == ECC_EMC)
 148             s->regs[ECC_MER] = s->version | (val & ECC_MER_MASK_1);
 149         else if (s->version == ECC_SMC)
 150             s->regs[ECC_MER] = s->version | (val & ECC_MER_MASK_2);
 151         trace_ecc_mem_writel_mer(val);
 152         break;
 153     case ECC_MDR:
 154         s->regs[ECC_MDR] =  val & ECC_MDR_MASK;
 155         trace_ecc_mem_writel_mdr(val);
 156         break;
 157     case ECC_MFSR:
 158         s->regs[ECC_MFSR] =  val;
 159         qemu_irq_lower(s->irq);
 160         trace_ecc_mem_writel_mfsr(val);
 161         break;
 162     case ECC_VCR:
 163         s->regs[ECC_VCR] =  val;
 164         trace_ecc_mem_writel_vcr(val);
 165         break;
 166     case ECC_DR:
 167         s->regs[ECC_DR] =  val;
 168         trace_ecc_mem_writel_dr(val);
 169         break;
 170     case ECC_ECR0:
 171         s->regs[ECC_ECR0] =  val;
 172         trace_ecc_mem_writel_ecr0(val);
 173         break;
 174     case ECC_ECR1:
 175         s->regs[ECC_ECR0] =  val;
 176         trace_ecc_mem_writel_ecr1(val);
 177         break;
 178     }
 179 }
 180
 181 static uint64_t ecc_mem_read(void *opaque, hwaddr addr,
 182                              unsigned size)
 183 {
 184     ECCState *s = opaque;
 185     uint32_t ret = 0;
 186
 187     switch (addr >> 2) {
 188     case ECC_MER:
 189         ret = s->regs[ECC_MER];
 190         trace_ecc_mem_readl_mer(ret);
 191         break;
 192     case ECC_MDR:
 193         ret = s->regs[ECC_MDR];
 194         trace_ecc_mem_readl_mdr(ret);
 195         break;
 196     case ECC_MFSR:
 197         ret = s->regs[ECC_MFSR];
 198         trace_ecc_mem_readl_mfsr(ret);
 199         break;
 200     case ECC_VCR:
 201         ret = s->regs[ECC_VCR];
 202         trace_ecc_mem_readl_vcr(ret);
 203         break;
 204     case ECC_MFAR0:
 205         ret = s->regs[ECC_MFAR0];
 206         trace_ecc_mem_readl_mfar0(ret);
 207         break;
 208     case ECC_MFAR1:
 209         ret = s->regs[ECC_MFAR1];
 210         trace_ecc_mem_readl_mfar1(ret);
 211         break;
 212     case ECC_DR:
 213         ret = s->regs[ECC_DR];
 214         trace_ecc_mem_readl_dr(ret);
 215         break;
 216     case ECC_ECR0:
 217         ret = s->regs[ECC_ECR0];
 218         trace_ecc_mem_readl_ecr0(ret);
 219         break;
 220     case ECC_ECR1:
 221         ret = s->regs[ECC_ECR0];
 222         trace_ecc_mem_readl_ecr1(ret);
 223         break;
 224     }
 225     return ret;
 226 }
 227
 228 static const MemoryRegionOps ecc_mem_ops = {
 229     .read = ecc_mem_read,
 230     .write = ecc_mem_write,
 231     .endianness = DEVICE_NATIVE_ENDIAN,
 232     .valid = {
 233         .min_access_size = 4,
 234         .max_access_size = 4,
 235     },
 236 };
 237
 238 static void ecc_diag_mem_write(void *opaque, hwaddr addr,
 239                                uint64_t val, unsigned size)
 240 {
 241     ECCState *s = opaque;
 242
 243     trace_ecc_diag_mem_writeb(addr, val);
 244     s->diag[addr & ECC_DIAG_MASK] = val;
 245 }
 246
 247 static uint64_t ecc_diag_mem_read(void *opaque, hwaddr addr,
 248                                   unsigned size)
 249 {
 250     ECCState *s = opaque;
 251     uint32_t ret = s->diag[(int)addr];
 252
 253     trace_ecc_diag_mem_readb(addr, ret);
 254     return ret;
 255 }
 256
 257 static const MemoryRegionOps ecc_diag_mem_ops = {
 258     .read = ecc_diag_mem_read,
 259     .write = ecc_diag_mem_write,
 260     .endianness = DEVICE_NATIVE_ENDIAN,
 261     .valid = {
 262         .min_access_size = 1,
 263         .max_access_size = 1,
 264     },
 265 };
 266
 267 static const VMStateDescription vmstate_ecc = {
 268     .name ="ECC",
 269     .version_id = 3,
 270     .minimum_version_id = 3,
 271     .fields = (VMStateField[]) {
 272         VMSTATE_UINT32_ARRAY(regs, ECCState, ECC_NREGS),
 273         VMSTATE_BUFFER(diag, ECCState),
 274         VMSTATE_UINT32(version, ECCState),
 275         VMSTATE_END_OF_LIST()
 276     }
 277 };
 278
 279 static void ecc_reset(DeviceState *d)
 280 {
 281     ECCState *s = ECC_MEMCTL(d);
 282
 283     if (s->version == ECC_MCC) {
 284         s->regs[ECC_MER] &= ECC_MER_REU;
 285     } else {
 286         s->regs[ECC_MER] &= (ECC_MER_VER | ECC_MER_IMPL | ECC_MER_MRR |
 287                              ECC_MER_DCI);
 288     }
 289     s->regs[ECC_MDR] = 0x20;
 290     s->regs[ECC_MFSR] = 0;
 291     s->regs[ECC_VCR] = 0;
 292     s->regs[ECC_MFAR0] = 0x07c00000;
 293     s->regs[ECC_MFAR1] = 0;
 294     s->regs[ECC_DR] = 0;
 295     s->regs[ECC_ECR0] = 0;
 296     s->regs[ECC_ECR1] = 0;
 297 }
 298
 299 static void ecc_init(Object *obj)
 300 {
 301     ECCState *s = ECC_MEMCTL(obj);
 302     SysBusDevice *dev = SYS_BUS_DEVICE(obj);
 303
 304     sysbus_init_irq(dev, &s->irq);
 305
 306     memory_region_init_io(&s->iomem, obj, &ecc_mem_ops, s, "ecc", ECC_SIZE);
 307     sysbus_init_mmio(dev, &s->iomem);
 308 }
 309
 310 static void ecc_realize(DeviceState *dev, Error **errp)
 311 {
 312     ECCState *s = ECC_MEMCTL(dev);
 313     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
 314
 315     s->regs[0] = s->version;
 316
 317     if (s->version == ECC_MCC) { // SS-600MP only
 318         memory_region_init_io(&s->iomem_diag, OBJECT(dev), &ecc_diag_mem_ops, s,
 319                               "ecc.diag", ECC_DIAG_SIZE);
 320         sysbus_init_mmio(sbd, &s->iomem_diag);
 321     }
 322 }
 323
 324 static Property ecc_properties[] = {
 325     DEFINE_PROP_UINT32("version", ECCState, version, -1),
 326     DEFINE_PROP_END_OF_LIST(),
 327 };
 328
 329 static void ecc_class_init(ObjectClass *klass, void *data)
 330 {
 331     DeviceClass *dc = DEVICE_CLASS(klass);
 332
 333     dc->realize = ecc_realize;
 334     dc->reset = ecc_reset;
 335     dc->vmsd = &vmstate_ecc;
 336     dc->props = ecc_properties;
 337 }
 338
 339 static const TypeInfo ecc_info = {
 340     .name          = TYPE_ECC_MEMCTL,
 341     .parent        = TYPE_SYS_BUS_DEVICE,
 342     .instance_size = sizeof(ECCState),
 343     .instance_init = ecc_init,
 344     .class_init    = ecc_class_init,
 345 };
 346
 347
 348 static void ecc_register_types(void)
 349 {
 350     type_register_static(&ecc_info);
 351 }
 352
 353 type_init(ecc_register_types)