LXR qemu/hw/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 "sysbus.h"
  26#include "trace.h"
  27
  28/* There are 3 versions of this chip used in SMP sun4m systems:
  29 * MCC (version 0, implementation 0) SS-600MP
  30 * EMC (version 0, implementation 1) SS-10
  31 * SMC (version 0, implementation 2) SS-10SX and SS-20
  32 *
  33 * Chipset docs:
  34 * "Sun-4M System Architecture (revision 2.0) by Chuck Narad", 950-1373-01,
  35 * http://mediacast.sun.com/users/Barton808/media/Sun4M_SystemArchitecture_edited2.pdf
  36 */
  37
  38#define ECC_MCC        0x00000000
  39#define ECC_EMC        0x10000000
  40#define ECC_SMC        0x20000000
  41
  42/* Register indexes */
  43#define ECC_MER        0               /* Memory Enable Register */
  44#define ECC_MDR        1               /* Memory Delay Register */
  45#define ECC_MFSR       2               /* Memory Fault Status Register */
  46#define ECC_VCR        3               /* Video Configuration Register */
  47#define ECC_MFAR0      4               /* Memory Fault Address Register 0 */
  48#define ECC_MFAR1      5               /* Memory Fault Address Register 1 */
  49#define ECC_DR         6               /* Diagnostic Register */
  50#define ECC_ECR0       7               /* Event Count Register 0 */
  51#define ECC_ECR1       8               /* Event Count Register 1 */
  52
  53/* ECC fault control register */
  54#define ECC_MER_EE     0x00000001      /* Enable ECC checking */
  55#define ECC_MER_EI     0x00000002      /* Enable Interrupts on
  56                                          correctable errors */
  57#define ECC_MER_MRR0   0x00000004      /* SIMM 0 */
  58#define ECC_MER_MRR1   0x00000008      /* SIMM 1 */
  59#define ECC_MER_MRR2   0x00000010      /* SIMM 2 */
  60#define ECC_MER_MRR3   0x00000020      /* SIMM 3 */
  61#define ECC_MER_MRR4   0x00000040      /* SIMM 4 */
  62#define ECC_MER_MRR5   0x00000080      /* SIMM 5 */
  63#define ECC_MER_MRR6   0x00000100      /* SIMM 6 */
  64#define ECC_MER_MRR7   0x00000200      /* SIMM 7 */
  65#define ECC_MER_REU    0x00000100      /* Memory Refresh Enable (600MP) */
  66#define ECC_MER_MRR    0x000003fc      /* MRR mask */
  67#define ECC_MER_A      0x00000400      /* Memory controller addr map select */
  68#define ECC_MER_DCI    0x00000800      /* Disables Coherent Invalidate ACK */
  69#define ECC_MER_VER    0x0f000000      /* Version */
  70#define ECC_MER_IMPL   0xf0000000      /* Implementation */
  71#define ECC_MER_MASK_0 0x00000103      /* Version 0 (MCC) mask */
  72#define ECC_MER_MASK_1 0x00000bff      /* Version 1 (EMC) mask */
  73#define ECC_MER_MASK_2 0x00000bff      /* Version 2 (SMC) mask */
  74
  75/* ECC memory delay register */
  76#define ECC_MDR_RRI    0x000003ff      /* Refresh Request Interval */
  77#define ECC_MDR_MI     0x00001c00      /* MIH Delay */
  78#define ECC_MDR_CI     0x0000e000      /* Coherent Invalidate Delay */
  79#define ECC_MDR_MDL    0x001f0000      /* MBus Master arbitration delay */
  80#define ECC_MDR_MDH    0x03e00000      /* MBus Master arbitration delay */
  81#define ECC_MDR_GAD    0x7c000000      /* Graphics Arbitration Delay */
  82#define ECC_MDR_RSC    0x80000000      /* Refresh load control */
  83#define ECC_MDR_MASK   0x7fffffff
  84
  85/* ECC fault status register */
  86#define ECC_MFSR_CE    0x00000001      /* Correctable error */
  87#define ECC_MFSR_BS    0x00000002      /* C2 graphics bad slot access */
  88#define ECC_MFSR_TO    0x00000004      /* Timeout on write */
  89#define ECC_MFSR_UE    0x00000008      /* Uncorrectable error */
  90#define ECC_MFSR_DW    0x000000f0      /* Index of double word in block */
  91#define ECC_MFSR_SYND  0x0000ff00      /* Syndrome for correctable error */
  92#define ECC_MFSR_ME    0x00010000      /* Multiple errors */
  93#define ECC_MFSR_C2ERR 0x00020000      /* C2 graphics error */
  94
  95/* ECC fault address register 0 */
  96#define ECC_MFAR0_PADDR 0x0000000f     /* PA[32-35] */
  97#define ECC_MFAR0_TYPE  0x000000f0     /* Transaction type */
  98#define ECC_MFAR0_SIZE  0x00000700     /* Transaction size */
  99#define ECC_MFAR0_CACHE 0x00000800     /* Mapped cacheable */
 100#define ECC_MFAR0_LOCK  0x00001000     /* Error occurred in atomic cycle */
 101#define ECC_MFAR0_BMODE 0x00002000     /* Boot mode */
 102#define ECC_MFAR0_VADDR 0x003fc000     /* VA[12-19] (superset bits) */
 103#define ECC_MFAR0_S     0x08000000     /* Supervisor mode */
 104#define ECC_MFARO_MID   0xf0000000     /* Module ID */
 105
 106/* ECC diagnostic register */
 107#define ECC_DR_CBX     0x00000001
 108#define ECC_DR_CB0     0x00000002
 109#define ECC_DR_CB1     0x00000004
 110#define ECC_DR_CB2     0x00000008
 111#define ECC_DR_CB4     0x00000010
 112#define ECC_DR_CB8     0x00000020
 113#define ECC_DR_CB16    0x00000040
 114#define ECC_DR_CB32    0x00000080
 115#define ECC_DR_DMODE   0x00000c00
 116
 117#define ECC_NREGS      9
 118#define ECC_SIZE       (ECC_NREGS * sizeof(uint32_t))
 119
 120#define ECC_DIAG_SIZE  4
 121#define ECC_DIAG_MASK  (ECC_DIAG_SIZE - 1)
 122
 123typedef struct ECCState {
 124    SysBusDevice busdev;
 125    MemoryRegion iomem, iomem_diag;
 126    qemu_irq irq;
 127    uint32_t regs[ECC_NREGS];
 128    uint8_t diag[ECC_DIAG_SIZE];
 129    uint32_t version;
 130} ECCState;
 131
 132static void ecc_mem_write(void *opaque, hwaddr addr, uint64_t val,
 133                          unsigned size)
 134{
 135    ECCState *s = opaque;
 136
 137    switch (addr >> 2) {
 138    case ECC_MER:
 139        if (s->version == ECC_MCC)
 140            s->regs[ECC_MER] = (val & ECC_MER_MASK_0);
 141        else if (s->version == ECC_EMC)
 142            s->regs[ECC_MER] = s->version | (val & ECC_MER_MASK_1);
 143        else if (s->version == ECC_SMC)
 144            s->regs[ECC_MER] = s->version | (val & ECC_MER_MASK_2);
 145        trace_ecc_mem_writel_mer(val);
 146        break;
 147    case ECC_MDR:
 148        s->regs[ECC_MDR] =  val & ECC_MDR_MASK;
 149        trace_ecc_mem_writel_mdr(val);
 150        break;
 151    case ECC_MFSR:
 152        s->regs[ECC_MFSR] =  val;
 153        qemu_irq_lower(s->irq);
 154        trace_ecc_mem_writel_mfsr(val);
 155        break;
 156    case ECC_VCR:
 157        s->regs[ECC_VCR] =  val;
 158        trace_ecc_mem_writel_vcr(val);
 159        break;
 160    case ECC_DR:
 161        s->regs[ECC_DR] =  val;
 162        trace_ecc_mem_writel_dr(val);
 163        break;
 164    case ECC_ECR0:
 165        s->regs[ECC_ECR0] =  val;
 166        trace_ecc_mem_writel_ecr0(val);
 167        break;
 168    case ECC_ECR1:
 169        s->regs[ECC_ECR0] =  val;
 170        trace_ecc_mem_writel_ecr1(val);
 171        break;
 172    }
 173}
 174
 175static uint64_t ecc_mem_read(void *opaque, hwaddr addr,
 176                             unsigned size)
 177{
 178    ECCState *s = opaque;
 179    uint32_t ret = 0;
 180
 181    switch (addr >> 2) {
 182    case ECC_MER:
 183        ret = s->regs[ECC_MER];
 184        trace_ecc_mem_readl_mer(ret);
 185        break;
 186    case ECC_MDR:
 187        ret = s->regs[ECC_MDR];
 188        trace_ecc_mem_readl_mdr(ret);
 189        break;
 190    case ECC_MFSR:
 191        ret = s->regs[ECC_MFSR];
 192        trace_ecc_mem_readl_mfsr(ret);
 193        break;
 194    case ECC_VCR:
 195        ret = s->regs[ECC_VCR];
 196        trace_ecc_mem_readl_vcr(ret);
 197        break;
 198    case ECC_MFAR0:
 199        ret = s->regs[ECC_MFAR0];
 200        trace_ecc_mem_readl_mfar0(ret);
 201        break;
 202    case ECC_MFAR1:
 203        ret = s->regs[ECC_MFAR1];
 204        trace_ecc_mem_readl_mfar1(ret);
 205        break;
 206    case ECC_DR:
 207        ret = s->regs[ECC_DR];
 208        trace_ecc_mem_readl_dr(ret);
 209        break;
 210    case ECC_ECR0:
 211        ret = s->regs[ECC_ECR0];
 212        trace_ecc_mem_readl_ecr0(ret);
 213        break;
 214    case ECC_ECR1:
 215        ret = s->regs[ECC_ECR0];
 216        trace_ecc_mem_readl_ecr1(ret);
 217        break;
 218    }
 219    return ret;
 220}
 221
 222static const MemoryRegionOps ecc_mem_ops = {
 223    .read = ecc_mem_read,
 224    .write = ecc_mem_write,
 225    .endianness = DEVICE_NATIVE_ENDIAN,
 226    .valid = {
 227        .min_access_size = 4,
 228        .max_access_size = 4,
 229    },
 230};
 231
 232static void ecc_diag_mem_write(void *opaque, hwaddr addr,
 233                               uint64_t val, unsigned size)
 234{
 235    ECCState *s = opaque;
 236
 237    trace_ecc_diag_mem_writeb(addr, val);
 238    s->diag[addr & ECC_DIAG_MASK] = val;
 239}
 240
 241static uint64_t ecc_diag_mem_read(void *opaque, hwaddr addr,
 242                                  unsigned size)
 243{
 244    ECCState *s = opaque;
 245    uint32_t ret = s->diag[(int)addr];
 246
 247    trace_ecc_diag_mem_readb(addr, ret);
 248    return ret;
 249}
 250
 251static const MemoryRegionOps ecc_diag_mem_ops = {
 252    .read = ecc_diag_mem_read,
 253    .write = ecc_diag_mem_write,
 254    .endianness = DEVICE_NATIVE_ENDIAN,
 255    .valid = {
 256        .min_access_size = 1,
 257        .max_access_size = 1,
 258    },
 259};
 260
 261static const VMStateDescription vmstate_ecc = {
 262    .name ="ECC",
 263    .version_id = 3,
 264    .minimum_version_id = 3,
 265    .minimum_version_id_old = 3,
 266    .fields      = (VMStateField []) {
 267        VMSTATE_UINT32_ARRAY(regs, ECCState, ECC_NREGS),
 268        VMSTATE_BUFFER(diag, ECCState),
 269        VMSTATE_UINT32(version, ECCState),
 270        VMSTATE_END_OF_LIST()
 271    }
 272};
 273
 274static void ecc_reset(DeviceState *d)
 275{
 276    ECCState *s = container_of(d, ECCState, busdev.qdev);
 277
 278    if (s->version == ECC_MCC)
 279        s->regs[ECC_MER] &= ECC_MER_REU;
 280    else
 281        s->regs[ECC_MER] &= (ECC_MER_VER | ECC_MER_IMPL | ECC_MER_MRR |
 282                             ECC_MER_DCI);
 283    s->regs[ECC_MDR] = 0x20;
 284    s->regs[ECC_MFSR] = 0;
 285    s->regs[ECC_VCR] = 0;
 286    s->regs[ECC_MFAR0] = 0x07c00000;
 287    s->regs[ECC_MFAR1] = 0;
 288    s->regs[ECC_DR] = 0;
 289    s->regs[ECC_ECR0] = 0;
 290    s->regs[ECC_ECR1] = 0;
 291}
 292
 293static int ecc_init1(SysBusDevice *dev)
 294{
 295    ECCState *s = FROM_SYSBUS(ECCState, dev);
 296
 297    sysbus_init_irq(dev, &s->irq);
 298    s->regs[0] = s->version;
 299    memory_region_init_io(&s->iomem, &ecc_mem_ops, s, "ecc", ECC_SIZE);
 300    sysbus_init_mmio(dev, &s->iomem);
 301
 302    if (s->version == ECC_MCC) { // SS-600MP only
 303        memory_region_init_io(&s->iomem_diag, &ecc_diag_mem_ops, s,
 304                              "ecc.diag", ECC_DIAG_SIZE);
 305        sysbus_init_mmio(dev, &s->iomem_diag);
 306    }
 307
 308    return 0;
 309}
 310
 311static Property ecc_properties[] = {
 312    DEFINE_PROP_HEX32("version", ECCState, version, -1),
 313    DEFINE_PROP_END_OF_LIST(),
 314};
 315
 316static void ecc_class_init(ObjectClass *klass, void *data)
 317{
 318    DeviceClass *dc = DEVICE_CLASS(klass);
 319    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 320
 321    k->init = ecc_init1;
 322    dc->reset = ecc_reset;
 323    dc->vmsd = &vmstate_ecc;
 324    dc->props = ecc_properties;
 325}
 326
 327static const TypeInfo ecc_info = {
 328    .name          = "eccmemctl",
 329    .parent        = TYPE_SYS_BUS_DEVICE,
 330    .instance_size = sizeof(ECCState),
 331    .class_init    = ecc_class_init,
 332};
 333
 334
 335static void ecc_register_types(void)
 336{
 337    type_register_static(&ecc_info);
 338}
 339
 340type_init(ecc_register_types)
 341