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/irq.h"
  27 #include "hw/qdev-properties.h"
  28 #include "hw/sysbus.h"
  29 #include "migration/vmstate.h"
  30 #include "qemu/module.h"
  31 #include "trace.h"
  32 #include "qom/object.h"
  33
  34 /* There are 3 versions of this chip used in SMP sun4m systems:
  35  * MCC (version 0, implementation 0) SS-600MP
  36  * EMC (version 0, implementation 1) SS-10
  37  * SMC (version 0, implementation 2) SS-10SX and SS-20
  38  *
  39  * Chipset docs:
  40  * "Sun-4M System Architecture (revision 2.0) by Chuck Narad", 950-1373-01,
  41  * http://mediacast.sun.com/users/Barton808/media/Sun4M_SystemArchitecture_edited2.pdf
  42  */
  43
  44 #define ECC_MCC        0x00000000
  45 #define ECC_EMC        0x10000000
  46 #define ECC_SMC        0x20000000
  47
  48 /* Register indexes */
  49 #define ECC_MER        0               /* Memory Enable Register */
  50 #define ECC_MDR        1               /* Memory Delay Register */
  51 #define ECC_MFSR       2               /* Memory Fault Status Register */
  52 #define ECC_VCR        3               /* Video Configuration Register */
  53 #define ECC_MFAR0      4               /* Memory Fault Address Register 0 */
  54 #define ECC_MFAR1      5               /* Memory Fault Address Register 1 */
  55 #define ECC_DR         6               /* Diagnostic Register */
  56 #define ECC_ECR0       7               /* Event Count Register 0 */
  57 #define ECC_ECR1       8               /* Event Count Register 1 */
  58
  59 /* ECC fault control register */
  60 #define ECC_MER_EE     0x00000001      /* Enable ECC checking */
  61 #define ECC_MER_EI     0x00000002      /* Enable Interrupts on
  62                                           correctable errors */
  63 #define ECC_MER_MRR0   0x00000004      /* SIMM 0 */
  64 #define ECC_MER_MRR1   0x00000008      /* SIMM 1 */
  65 #define ECC_MER_MRR2   0x00000010      /* SIMM 2 */
  66 #define ECC_MER_MRR3   0x00000020      /* SIMM 3 */
  67 #define ECC_MER_MRR4   0x00000040      /* SIMM 4 */
  68 #define ECC_MER_MRR5   0x00000080      /* SIMM 5 */
  69 #define ECC_MER_MRR6   0x00000100      /* SIMM 6 */
  70 #define ECC_MER_MRR7   0x00000200      /* SIMM 7 */
  71 #define ECC_MER_REU    0x00000100      /* Memory Refresh Enable (600MP) */
  72 #define ECC_MER_MRR    0x000003fc      /* MRR mask */
  73 #define ECC_MER_A      0x00000400      /* Memory controller addr map select */
  74 #define ECC_MER_DCI    0x00000800      /* Disables Coherent Invalidate ACK */
  75 #define ECC_MER_VER    0x0f000000      /* Version */
  76 #define ECC_MER_IMPL   0xf0000000      /* Implementation */
  77 #define ECC_MER_MASK_0 0x00000103      /* Version 0 (MCC) mask */
  78 #define ECC_MER_MASK_1 0x00000bff      /* Version 1 (EMC) mask */
  79 #define ECC_MER_MASK_2 0x00000bff      /* Version 2 (SMC) mask */
  80
  81 /* ECC memory delay register */
  82 #define ECC_MDR_RRI    0x000003ff      /* Refresh Request Interval */
  83 #define ECC_MDR_MI     0x00001c00      /* MIH Delay */
  84 #define ECC_MDR_CI     0x0000e000      /* Coherent Invalidate Delay */
  85 #define ECC_MDR_MDL    0x001f0000      /* MBus Master arbitration delay */
  86 #define ECC_MDR_MDH    0x03e00000      /* MBus Master arbitration delay */
  87 #define ECC_MDR_GAD    0x7c000000      /* Graphics Arbitration Delay */
  88 #define ECC_MDR_RSC    0x80000000      /* Refresh load control */
  89 #define ECC_MDR_MASK   0x7fffffff
  90
  91 /* ECC fault status register */
  92 #define ECC_MFSR_CE    0x00000001      /* Correctable error */
  93 #define ECC_MFSR_BS    0x00000002      /* C2 graphics bad slot access */
  94 #define ECC_MFSR_TO    0x00000004      /* Timeout on write */
  95 #define ECC_MFSR_UE    0x00000008      /* Uncorrectable error */
  96 #define ECC_MFSR_DW    0x000000f0      /* Index of double word in block */
  97 #define ECC_MFSR_SYND  0x0000ff00      /* Syndrome for correctable error */
  98 #define ECC_MFSR_ME    0x00010000      /* Multiple errors */
  99 #define ECC_MFSR_C2ERR 0x00020000      /* C2 graphics error */
 100
 101 /* ECC fault address register 0 */
 102 #define ECC_MFAR0_PADDR 0x0000000f     /* PA[32-35] */
 103 #define ECC_MFAR0_TYPE  0x000000f0     /* Transaction type */
 104 #define ECC_MFAR0_SIZE  0x00000700     /* Transaction size */
 105 #define ECC_MFAR0_CACHE 0x00000800     /* Mapped cacheable */
 106 #define ECC_MFAR0_LOCK  0x00001000     /* Error occurred in atomic cycle */
 107 #define ECC_MFAR0_BMODE 0x00002000     /* Boot mode */
 108 #define ECC_MFAR0_VADDR 0x003fc000     /* VA[12-19] (superset bits) */
 109 #define ECC_MFAR0_S     0x08000000     /* Supervisor mode */
 110 #define ECC_MFARO_MID   0xf0000000     /* Module ID */
 111
 112 /* ECC diagnostic register */
 113 #define ECC_DR_CBX     0x00000001
 114 #define ECC_DR_CB0     0x00000002
 115 #define ECC_DR_CB1     0x00000004
 116 #define ECC_DR_CB2     0x00000008
 117 #define ECC_DR_CB4     0x00000010
 118 #define ECC_DR_CB8     0x00000020
 119 #define ECC_DR_CB16    0x00000040
 120 #define ECC_DR_CB32    0x00000080
 121 #define ECC_DR_DMODE   0x00000c00
 122
 123 #define ECC_NREGS      9
 124 #define ECC_SIZE       (ECC_NREGS * sizeof(uint32_t))
 125
 126 #define ECC_DIAG_SIZE  4
 127 #define ECC_DIAG_MASK  (ECC_DIAG_SIZE - 1)
 128
 129 #define TYPE_ECC_MEMCTL "eccmemctl"
 130 OBJECT_DECLARE_SIMPLE_TYPE(ECCState, ECC_MEMCTL)
 131
 132 struct ECCState {
 133     SysBusDevice parent_obj;
 134
 135     MemoryRegion iomem, iomem_diag;
 136     qemu_irq irq;
 137     uint32_t regs[ECC_NREGS];
 138     uint8_t diag[ECC_DIAG_SIZE];
 139     uint32_t version;
 140 };
 141
 142 static void ecc_mem_write(void *opaque, hwaddr addr, uint64_t val,
 143                           unsigned size)
 144 {
 145     ECCState *s = opaque;
 146
 147     switch (addr >> 2) {
 148     case ECC_MER:
 149         if (s->version == ECC_MCC)
 150             s->regs[ECC_MER] = (val & ECC_MER_MASK_0);
 151         else if (s->version == ECC_EMC)
 152             s->regs[ECC_MER] = s->version | (val & ECC_MER_MASK_1);
 153         else if (s->version == ECC_SMC)
 154             s->regs[ECC_MER] = s->version | (val & ECC_MER_MASK_2);
 155         trace_ecc_mem_writel_mer(val);
 156         break;
 157     case ECC_MDR:
 158         s->regs[ECC_MDR] =  val & ECC_MDR_MASK;
 159         trace_ecc_mem_writel_mdr(val);
 160         break;
 161     case ECC_MFSR:
 162         s->regs[ECC_MFSR] =  val;
 163         qemu_irq_lower(s->irq);
 164         trace_ecc_mem_writel_mfsr(val);
 165         break;
 166     case ECC_VCR:
 167         s->regs[ECC_VCR] =  val;
 168         trace_ecc_mem_writel_vcr(val);
 169         break;
 170     case ECC_DR:
 171         s->regs[ECC_DR] =  val;
 172         trace_ecc_mem_writel_dr(val);
 173         break;
 174     case ECC_ECR0:
 175         s->regs[ECC_ECR0] =  val;
 176         trace_ecc_mem_writel_ecr0(val);
 177         break;
 178     case ECC_ECR1:
 179         s->regs[ECC_ECR0] =  val;
 180         trace_ecc_mem_writel_ecr1(val);
 181         break;
 182     }
 183 }
 184
 185 static uint64_t ecc_mem_read(void *opaque, hwaddr addr,
 186                              unsigned size)
 187 {
 188     ECCState *s = opaque;
 189     uint32_t ret = 0;
 190
 191     switch (addr >> 2) {
 192     case ECC_MER:
 193         ret = s->regs[ECC_MER];
 194         trace_ecc_mem_readl_mer(ret);
 195         break;
 196     case ECC_MDR:
 197         ret = s->regs[ECC_MDR];
 198         trace_ecc_mem_readl_mdr(ret);
 199         break;
 200     case ECC_MFSR:
 201         ret = s->regs[ECC_MFSR];
 202         trace_ecc_mem_readl_mfsr(ret);
 203         break;
 204     case ECC_VCR:
 205         ret = s->regs[ECC_VCR];
 206         trace_ecc_mem_readl_vcr(ret);
 207         break;
 208     case ECC_MFAR0:
 209         ret = s->regs[ECC_MFAR0];
 210         trace_ecc_mem_readl_mfar0(ret);
 211         break;
 212     case ECC_MFAR1:
 213         ret = s->regs[ECC_MFAR1];
 214         trace_ecc_mem_readl_mfar1(ret);
 215         break;
 216     case ECC_DR:
 217         ret = s->regs[ECC_DR];
 218         trace_ecc_mem_readl_dr(ret);
 219         break;
 220     case ECC_ECR0:
 221         ret = s->regs[ECC_ECR0];
 222         trace_ecc_mem_readl_ecr0(ret);
 223         break;
 224     case ECC_ECR1:
 225         ret = s->regs[ECC_ECR0];
 226         trace_ecc_mem_readl_ecr1(ret);
 227         break;
 228     }
 229     return ret;
 230 }
 231
 232 static const MemoryRegionOps ecc_mem_ops = {
 233     .read = ecc_mem_read,
 234     .write = ecc_mem_write,
 235     .endianness = DEVICE_NATIVE_ENDIAN,
 236     .valid = {
 237         .min_access_size = 4,
 238         .max_access_size = 4,
 239     },
 240 };
 241
 242 static void ecc_diag_mem_write(void *opaque, hwaddr addr,
 243                                uint64_t val, unsigned size)
 244 {
 245     ECCState *s = opaque;
 246
 247     trace_ecc_diag_mem_writeb(addr, val);
 248     s->diag[addr & ECC_DIAG_MASK] = val;
 249 }
 250
 251 static uint64_t ecc_diag_mem_read(void *opaque, hwaddr addr,
 252                                   unsigned size)
 253 {
 254     ECCState *s = opaque;
 255     uint32_t ret = s->diag[(int)addr];
 256
 257     trace_ecc_diag_mem_readb(addr, ret);
 258     return ret;
 259 }
 260
 261 static const MemoryRegionOps ecc_diag_mem_ops = {
 262     .read = ecc_diag_mem_read,
 263     .write = ecc_diag_mem_write,
 264     .endianness = DEVICE_NATIVE_ENDIAN,
 265     .valid = {
 266         .min_access_size = 1,
 267         .max_access_size = 1,
 268     },
 269 };
 270
 271 static const VMStateDescription vmstate_ecc = {
 272     .name ="ECC",
 273     .version_id = 3,
 274     .minimum_version_id = 3,
 275     .fields = (const VMStateField[]) {
 276         VMSTATE_UINT32_ARRAY(regs, ECCState, ECC_NREGS),
 277         VMSTATE_BUFFER(diag, ECCState),
 278         VMSTATE_UINT32(version, ECCState),
 279         VMSTATE_END_OF_LIST()
 280     }
 281 };
 282
 283 static void ecc_reset(DeviceState *d)
 284 {
 285     ECCState *s = ECC_MEMCTL(d);
 286
 287     if (s->version == ECC_MCC) {
 288         s->regs[ECC_MER] &= ECC_MER_REU;
 289     } else {
 290         s->regs[ECC_MER] &= (ECC_MER_VER | ECC_MER_IMPL | ECC_MER_MRR |
 291                              ECC_MER_DCI);
 292     }
 293     s->regs[ECC_MDR] = 0x20;
 294     s->regs[ECC_MFSR] = 0;
 295     s->regs[ECC_VCR] = 0;
 296     s->regs[ECC_MFAR0] = 0x07c00000;
 297     s->regs[ECC_MFAR1] = 0;
 298     s->regs[ECC_DR] = 0;
 299     s->regs[ECC_ECR0] = 0;
 300     s->regs[ECC_ECR1] = 0;
 301 }
 302
 303 static void ecc_init(Object *obj)
 304 {
 305     ECCState *s = ECC_MEMCTL(obj);
 306     SysBusDevice *dev = SYS_BUS_DEVICE(obj);
 307
 308     sysbus_init_irq(dev, &s->irq);
 309
 310     memory_region_init_io(&s->iomem, obj, &ecc_mem_ops, s, "ecc", ECC_SIZE);
 311     sysbus_init_mmio(dev, &s->iomem);
 312 }
 313
 314 static void ecc_realize(DeviceState *dev, Error **errp)
 315 {
 316     ECCState *s = ECC_MEMCTL(dev);
 317     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
 318
 319     s->regs[0] = s->version;
 320
 321     if (s->version == ECC_MCC) { // SS-600MP only
 322         memory_region_init_io(&s->iomem_diag, OBJECT(dev), &ecc_diag_mem_ops, s,
 323                               "ecc.diag", ECC_DIAG_SIZE);
 324         sysbus_init_mmio(sbd, &s->iomem_diag);
 325     }
 326 }
 327
 328 static Property ecc_properties[] = {
 329     DEFINE_PROP_UINT32("version", ECCState, version, -1),
 330     DEFINE_PROP_END_OF_LIST(),
 331 };
 332
 333 static void ecc_class_init(ObjectClass *klass, void *data)
 334 {
 335     DeviceClass *dc = DEVICE_CLASS(klass);
 336
 337     dc->realize = ecc_realize;
 338     device_class_set_legacy_reset(dc, ecc_reset);
 339     dc->vmsd = &vmstate_ecc;
 340     device_class_set_props(dc, ecc_properties);
 341 }
 342
 343 static const TypeInfo ecc_info = {
 344     .name          = TYPE_ECC_MEMCTL,
 345     .parent        = TYPE_SYS_BUS_DEVICE,
 346     .instance_size = sizeof(ECCState),
 347     .instance_init = ecc_init,
 348     .class_init    = ecc_class_init,
 349 };
 350
 351
 352 static void ecc_register_types(void)
 353 {
 354     type_register_static(&ecc_info);
 355 }
 356
 357 type_init(ecc_register_types)