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 "sun4m.h"
  26 #include "sysbus.h"
  27
  28 //#define DEBUG_ECC
  29
  30 #ifdef DEBUG_ECC
  31 #define DPRINTF(fmt, ...)                                       \
  32     do { printf("ECC: " fmt , ## __VA_ARGS__); } while (0)
  33 #else
  34 #define DPRINTF(fmt, ...)
  35 #endif
  36
  37 /* There are 3 versions of this chip used in SMP sun4m systems:
  38  * MCC (version 0, implementation 0) SS-600MP
  39  * EMC (version 0, implementation 1) SS-10
  40  * SMC (version 0, implementation 2) SS-10SX and SS-20
  41  */
  42
  43 #define ECC_MCC        0x00000000
  44 #define ECC_EMC        0x10000000
  45 #define ECC_SMC        0x20000000
  46
  47 /* Register indexes */
  48 #define ECC_MER        0               /* Memory Enable Register */
  49 #define ECC_MDR        1               /* Memory Delay Register */
  50 #define ECC_MFSR       2               /* Memory Fault Status Register */
  51 #define ECC_VCR        3               /* Video Configuration Register */
  52 #define ECC_MFAR0      4               /* Memory Fault Address Register 0 */
  53 #define ECC_MFAR1      5               /* Memory Fault Address Register 1 */
  54 #define ECC_DR         6               /* Diagnostic Register */
  55 #define ECC_ECR0       7               /* Event Count Register 0 */
  56 #define ECC_ECR1       8               /* Event Count Register 1 */
  57
  58 /* ECC fault control register */
  59 #define ECC_MER_EE     0x00000001      /* Enable ECC checking */
  60 #define ECC_MER_EI     0x00000002      /* Enable Interrupts on
  61                                           correctable errors */
  62 #define ECC_MER_MRR0   0x00000004      /* SIMM 0 */
  63 #define ECC_MER_MRR1   0x00000008      /* SIMM 1 */
  64 #define ECC_MER_MRR2   0x00000010      /* SIMM 2 */
  65 #define ECC_MER_MRR3   0x00000020      /* SIMM 3 */
  66 #define ECC_MER_MRR4   0x00000040      /* SIMM 4 */
  67 #define ECC_MER_MRR5   0x00000080      /* SIMM 5 */
  68 #define ECC_MER_MRR6   0x00000100      /* SIMM 6 */
  69 #define ECC_MER_MRR7   0x00000200      /* SIMM 7 */
  70 #define ECC_MER_REU    0x00000100      /* Memory Refresh Enable (600MP) */
  71 #define ECC_MER_MRR    0x000003fc      /* MRR mask */
  72 #define ECC_MER_A      0x00000400      /* Memory controller addr map select */
  73 #define ECC_MER_DCI    0x00000800      /* Disables Coherent Invalidate ACK */
  74 #define ECC_MER_VER    0x0f000000      /* Version */
  75 #define ECC_MER_IMPL   0xf0000000      /* Implementation */
  76 #define ECC_MER_MASK_0 0x00000103      /* Version 0 (MCC) mask */
  77 #define ECC_MER_MASK_1 0x00000bff      /* Version 1 (EMC) mask */
  78 #define ECC_MER_MASK_2 0x00000bff      /* Version 2 (SMC) mask */
  79
  80 /* ECC memory delay register */
  81 #define ECC_MDR_RRI    0x000003ff      /* Refresh Request Interval */
  82 #define ECC_MDR_MI     0x00001c00      /* MIH Delay */
  83 #define ECC_MDR_CI     0x0000e000      /* Coherent Invalidate Delay */
  84 #define ECC_MDR_MDL    0x001f0000      /* MBus Master arbitration delay */
  85 #define ECC_MDR_MDH    0x03e00000      /* MBus Master arbitration delay */
  86 #define ECC_MDR_GAD    0x7c000000      /* Graphics Arbitration Delay */
  87 #define ECC_MDR_RSC    0x80000000      /* Refresh load control */
  88 #define ECC_MDR_MASK   0x7fffffff
  89
  90 /* ECC fault status register */
  91 #define ECC_MFSR_CE    0x00000001      /* Correctable error */
  92 #define ECC_MFSR_BS    0x00000002      /* C2 graphics bad slot access */
  93 #define ECC_MFSR_TO    0x00000004      /* Timeout on write */
  94 #define ECC_MFSR_UE    0x00000008      /* Uncorrectable error */
  95 #define ECC_MFSR_DW    0x000000f0      /* Index of double word in block */
  96 #define ECC_MFSR_SYND  0x0000ff00      /* Syndrome for correctable error */
  97 #define ECC_MFSR_ME    0x00010000      /* Multiple errors */
  98 #define ECC_MFSR_C2ERR 0x00020000      /* C2 graphics error */
  99
 100 /* ECC fault address register 0 */
 101 #define ECC_MFAR0_PADDR 0x0000000f     /* PA[32-35] */
 102 #define ECC_MFAR0_TYPE  0x000000f0     /* Transaction type */
 103 #define ECC_MFAR0_SIZE  0x00000700     /* Transaction size */
 104 #define ECC_MFAR0_CACHE 0x00000800     /* Mapped cacheable */
 105 #define ECC_MFAR0_LOCK  0x00001000     /* Error occurred in atomic cycle */
 106 #define ECC_MFAR0_BMODE 0x00002000     /* Boot mode */
 107 #define ECC_MFAR0_VADDR 0x003fc000     /* VA[12-19] (superset bits) */
 108 #define ECC_MFAR0_S     0x08000000     /* Supervisor mode */
 109 #define ECC_MFARO_MID   0xf0000000     /* Module ID */
 110
 111 /* ECC diagnostic register */
 112 #define ECC_DR_CBX     0x00000001
 113 #define ECC_DR_CB0     0x00000002
 114 #define ECC_DR_CB1     0x00000004
 115 #define ECC_DR_CB2     0x00000008
 116 #define ECC_DR_CB4     0x00000010
 117 #define ECC_DR_CB8     0x00000020
 118 #define ECC_DR_CB16    0x00000040
 119 #define ECC_DR_CB32    0x00000080
 120 #define ECC_DR_DMODE   0x00000c00
 121
 122 #define ECC_NREGS      9
 123 #define ECC_SIZE       (ECC_NREGS * sizeof(uint32_t))
 124
 125 #define ECC_DIAG_SIZE  4
 126 #define ECC_DIAG_MASK  (ECC_DIAG_SIZE - 1)
 127
 128 typedef struct ECCState {
 129     SysBusDevice busdev;
 130     qemu_irq irq;
 131     uint32_t regs[ECC_NREGS];
 132     uint8_t diag[ECC_DIAG_SIZE];
 133     uint32_t version;
 134 } ECCState;
 135
 136 static void ecc_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
 137 {
 138     ECCState *s = opaque;
 139
 140     switch (addr >> 2) {
 141     case ECC_MER:
 142         if (s->version == ECC_MCC)
 143             s->regs[ECC_MER] = (val & ECC_MER_MASK_0);
 144         else if (s->version == ECC_EMC)
 145             s->regs[ECC_MER] = s->version | (val & ECC_MER_MASK_1);
 146         else if (s->version == ECC_SMC)
 147             s->regs[ECC_MER] = s->version | (val & ECC_MER_MASK_2);
 148         DPRINTF("Write memory enable %08x\n", val);
 149         break;
 150     case ECC_MDR:
 151         s->regs[ECC_MDR] =  val & ECC_MDR_MASK;
 152         DPRINTF("Write memory delay %08x\n", val);
 153         break;
 154     case ECC_MFSR:
 155         s->regs[ECC_MFSR] =  val;
 156         qemu_irq_lower(s->irq);
 157         DPRINTF("Write memory fault status %08x\n", val);
 158         break;
 159     case ECC_VCR:
 160         s->regs[ECC_VCR] =  val;
 161         DPRINTF("Write slot configuration %08x\n", val);
 162         break;
 163     case ECC_DR:
 164         s->regs[ECC_DR] =  val;
 165         DPRINTF("Write diagnostic %08x\n", val);
 166         break;
 167     case ECC_ECR0:
 168         s->regs[ECC_ECR0] =  val;
 169         DPRINTF("Write event count 1 %08x\n", val);
 170         break;
 171     case ECC_ECR1:
 172         s->regs[ECC_ECR0] =  val;
 173         DPRINTF("Write event count 2 %08x\n", val);
 174         break;
 175     }
 176 }
 177
 178 static uint32_t ecc_mem_readl(void *opaque, target_phys_addr_t addr)
 179 {
 180     ECCState *s = opaque;
 181     uint32_t ret = 0;
 182
 183     switch (addr >> 2) {
 184     case ECC_MER:
 185         ret = s->regs[ECC_MER];
 186         DPRINTF("Read memory enable %08x\n", ret);
 187         break;
 188     case ECC_MDR:
 189         ret = s->regs[ECC_MDR];
 190         DPRINTF("Read memory delay %08x\n", ret);
 191         break;
 192     case ECC_MFSR:
 193         ret = s->regs[ECC_MFSR];
 194         DPRINTF("Read memory fault status %08x\n", ret);
 195         break;
 196     case ECC_VCR:
 197         ret = s->regs[ECC_VCR];
 198         DPRINTF("Read slot configuration %08x\n", ret);
 199         break;
 200     case ECC_MFAR0:
 201         ret = s->regs[ECC_MFAR0];
 202         DPRINTF("Read memory fault address 0 %08x\n", ret);
 203         break;
 204     case ECC_MFAR1:
 205         ret = s->regs[ECC_MFAR1];
 206         DPRINTF("Read memory fault address 1 %08x\n", ret);
 207         break;
 208     case ECC_DR:
 209         ret = s->regs[ECC_DR];
 210         DPRINTF("Read diagnostic %08x\n", ret);
 211         break;
 212     case ECC_ECR0:
 213         ret = s->regs[ECC_ECR0];
 214         DPRINTF("Read event count 1 %08x\n", ret);
 215         break;
 216     case ECC_ECR1:
 217         ret = s->regs[ECC_ECR0];
 218         DPRINTF("Read event count 2 %08x\n", ret);
 219         break;
 220     }
 221     return ret;
 222 }
 223
 224 static CPUReadMemoryFunc * const ecc_mem_read[3] = {
 225     NULL,
 226     NULL,
 227     ecc_mem_readl,
 228 };
 229
 230 static CPUWriteMemoryFunc * const ecc_mem_write[3] = {
 231     NULL,
 232     NULL,
 233     ecc_mem_writel,
 234 };
 235
 236 static void ecc_diag_mem_writeb(void *opaque, target_phys_addr_t addr,
 237                                 uint32_t val)
 238 {
 239     ECCState *s = opaque;
 240
 241     DPRINTF("Write diagnostic[%d] = %02x\n", (int)addr, val);
 242     s->diag[addr & ECC_DIAG_MASK] = val;
 243 }
 244
 245 static uint32_t ecc_diag_mem_readb(void *opaque, target_phys_addr_t addr)
 246 {
 247     ECCState *s = opaque;
 248     uint32_t ret = s->diag[(int)addr];
 249
 250     DPRINTF("Read diagnostic[%d] = %02x\n", (int)addr, ret);
 251     return ret;
 252 }
 253
 254 static CPUReadMemoryFunc * const ecc_diag_mem_read[3] = {
 255     ecc_diag_mem_readb,
 256     NULL,
 257     NULL,
 258 };
 259
 260 static CPUWriteMemoryFunc * const ecc_diag_mem_write[3] = {
 261     ecc_diag_mem_writeb,
 262     NULL,
 263     NULL,
 264 };
 265
 266 static const VMStateDescription vmstate_ecc = {
 267     .name ="ECC",
 268     .version_id = 3,
 269     .minimum_version_id = 3,
 270     .minimum_version_id_old = 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(void *opaque)
 280 {
 281     ECCState *s = opaque;
 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     s->regs[ECC_MDR] = 0x20;
 289     s->regs[ECC_MFSR] = 0;
 290     s->regs[ECC_VCR] = 0;
 291     s->regs[ECC_MFAR0] = 0x07c00000;
 292     s->regs[ECC_MFAR1] = 0;
 293     s->regs[ECC_DR] = 0;
 294     s->regs[ECC_ECR0] = 0;
 295     s->regs[ECC_ECR1] = 0;
 296 }
 297
 298 static int ecc_init1(SysBusDevice *dev)
 299 {
 300     int ecc_io_memory;
 301     ECCState *s = FROM_SYSBUS(ECCState, dev);
 302
 303     sysbus_init_irq(dev, &s->irq);
 304     s->regs[0] = s->version;
 305     ecc_io_memory = cpu_register_io_memory(ecc_mem_read, ecc_mem_write, s);
 306     sysbus_init_mmio(dev, ECC_SIZE, ecc_io_memory);
 307
 308     if (s->version == ECC_MCC) { // SS-600MP only
 309         ecc_io_memory = cpu_register_io_memory(ecc_diag_mem_read,
 310                                                ecc_diag_mem_write, s);
 311         sysbus_init_mmio(dev, ECC_DIAG_SIZE, ecc_io_memory);
 312     }
 313     vmstate_register(-1, &vmstate_ecc, s);
 314     qemu_register_reset(ecc_reset, s);
 315     ecc_reset(s);
 316     return 0;
 317 }
 318
 319 static SysBusDeviceInfo ecc_info = {
 320     .init = ecc_init1,
 321     .qdev.name  = "eccmemctl",
 322     .qdev.size  = sizeof(ECCState),
 323     .qdev.props = (Property[]) {
 324         DEFINE_PROP_HEX32("version", ECCState, version, -1),
 325         DEFINE_PROP_END_OF_LIST(),
 326     }
 327 };
 328
 329
 330 static void ecc_register_devices(void)
 331 {
 332     sysbus_register_withprop(&ecc_info);
 333 }
 334
 335 device_init(ecc_register_devices)