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 #include "hw.h"
  25 #include "sun4m.h"
  26 #include "sysemu.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     qemu_irq irq;
 130     uint32_t regs[ECC_NREGS];
 131     uint8_t diag[ECC_DIAG_SIZE];
 132     uint32_t version;
 133 } ECCState;
 134
 135 static void ecc_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
 136 {
 137     ECCState *s = opaque;
 138
 139     switch (addr >> 2) {
 140     case ECC_MER:
 141         if (s->version == ECC_MCC)
 142             s->regs[ECC_MER] = (val & ECC_MER_MASK_0);
 143         else if (s->version == ECC_EMC)
 144             s->regs[ECC_MER] = s->version | (val & ECC_MER_MASK_1);
 145         else if (s->version == ECC_SMC)
 146             s->regs[ECC_MER] = s->version | (val & ECC_MER_MASK_2);
 147         DPRINTF("Write memory enable %08x\n", val);
 148         break;
 149     case ECC_MDR:
 150         s->regs[ECC_MDR] =  val & ECC_MDR_MASK;
 151         DPRINTF("Write memory delay %08x\n", val);
 152         break;
 153     case ECC_MFSR:
 154         s->regs[ECC_MFSR] =  val;
 155         qemu_irq_lower(s->irq);
 156         DPRINTF("Write memory fault status %08x\n", val);
 157         break;
 158     case ECC_VCR:
 159         s->regs[ECC_VCR] =  val;
 160         DPRINTF("Write slot configuration %08x\n", val);
 161         break;
 162     case ECC_DR:
 163         s->regs[ECC_DR] =  val;
 164         DPRINTF("Write diagnostic %08x\n", val);
 165         break;
 166     case ECC_ECR0:
 167         s->regs[ECC_ECR0] =  val;
 168         DPRINTF("Write event count 1 %08x\n", val);
 169         break;
 170     case ECC_ECR1:
 171         s->regs[ECC_ECR0] =  val;
 172         DPRINTF("Write event count 2 %08x\n", val);
 173         break;
 174     }
 175 }
 176
 177 static uint32_t ecc_mem_readl(void *opaque, target_phys_addr_t addr)
 178 {
 179     ECCState *s = opaque;
 180     uint32_t ret = 0;
 181
 182     switch (addr >> 2) {
 183     case ECC_MER:
 184         ret = s->regs[ECC_MER];
 185         DPRINTF("Read memory enable %08x\n", ret);
 186         break;
 187     case ECC_MDR:
 188         ret = s->regs[ECC_MDR];
 189         DPRINTF("Read memory delay %08x\n", ret);
 190         break;
 191     case ECC_MFSR:
 192         ret = s->regs[ECC_MFSR];
 193         DPRINTF("Read memory fault status %08x\n", ret);
 194         break;
 195     case ECC_VCR:
 196         ret = s->regs[ECC_VCR];
 197         DPRINTF("Read slot configuration %08x\n", ret);
 198         break;
 199     case ECC_MFAR0:
 200         ret = s->regs[ECC_MFAR0];
 201         DPRINTF("Read memory fault address 0 %08x\n", ret);
 202         break;
 203     case ECC_MFAR1:
 204         ret = s->regs[ECC_MFAR1];
 205         DPRINTF("Read memory fault address 1 %08x\n", ret);
 206         break;
 207     case ECC_DR:
 208         ret = s->regs[ECC_DR];
 209         DPRINTF("Read diagnostic %08x\n", ret);
 210         break;
 211     case ECC_ECR0:
 212         ret = s->regs[ECC_ECR0];
 213         DPRINTF("Read event count 1 %08x\n", ret);
 214         break;
 215     case ECC_ECR1:
 216         ret = s->regs[ECC_ECR0];
 217         DPRINTF("Read event count 2 %08x\n", ret);
 218         break;
 219     }
 220     return ret;
 221 }
 222
 223 static CPUReadMemoryFunc *ecc_mem_read[3] = {
 224     NULL,
 225     NULL,
 226     ecc_mem_readl,
 227 };
 228
 229 static CPUWriteMemoryFunc *ecc_mem_write[3] = {
 230     NULL,
 231     NULL,
 232     ecc_mem_writel,
 233 };
 234
 235 static void ecc_diag_mem_writeb(void *opaque, target_phys_addr_t addr,
 236                                 uint32_t val)
 237 {
 238     ECCState *s = opaque;
 239
 240     DPRINTF("Write diagnostic[%d] = %02x\n", (int)addr, val);
 241     s->diag[addr & ECC_DIAG_MASK] = val;
 242 }
 243
 244 static uint32_t ecc_diag_mem_readb(void *opaque, target_phys_addr_t addr)
 245 {
 246     ECCState *s = opaque;
 247     uint32_t ret = s->diag[(int)addr];
 248
 249     DPRINTF("Read diagnostic[%d] = %02x\n", (int)addr, ret);
 250     return ret;
 251 }
 252
 253 static CPUReadMemoryFunc *ecc_diag_mem_read[3] = {
 254     ecc_diag_mem_readb,
 255     NULL,
 256     NULL,
 257 };
 258
 259 static CPUWriteMemoryFunc *ecc_diag_mem_write[3] = {
 260     ecc_diag_mem_writeb,
 261     NULL,
 262     NULL,
 263 };
 264
 265 static int ecc_load(QEMUFile *f, void *opaque, int version_id)
 266 {
 267     ECCState *s = opaque;
 268     int i;
 269
 270     if (version_id != 3)
 271         return -EINVAL;
 272
 273     for (i = 0; i < ECC_NREGS; i++)
 274         qemu_get_be32s(f, &s->regs[i]);
 275
 276     for (i = 0; i < ECC_DIAG_SIZE; i++)
 277         qemu_get_8s(f, &s->diag[i]);
 278
 279     qemu_get_be32s(f, &s->version);
 280
 281     return 0;
 282 }
 283
 284 static void ecc_save(QEMUFile *f, void *opaque)
 285 {
 286     ECCState *s = opaque;
 287     int i;
 288
 289     for (i = 0; i < ECC_NREGS; i++)
 290         qemu_put_be32s(f, &s->regs[i]);
 291
 292     for (i = 0; i < ECC_DIAG_SIZE; i++)
 293         qemu_put_8s(f, &s->diag[i]);
 294
 295     qemu_put_be32s(f, &s->version);
 296 }
 297
 298 static void ecc_reset(void *opaque)
 299 {
 300     ECCState *s = opaque;
 301
 302     if (s->version == ECC_MCC)
 303         s->regs[ECC_MER] &= ECC_MER_REU;
 304     else
 305         s->regs[ECC_MER] &= (ECC_MER_VER | ECC_MER_IMPL | ECC_MER_MRR |
 306                              ECC_MER_DCI);
 307     s->regs[ECC_MDR] = 0x20;
 308     s->regs[ECC_MFSR] = 0;
 309     s->regs[ECC_VCR] = 0;
 310     s->regs[ECC_MFAR0] = 0x07c00000;
 311     s->regs[ECC_MFAR1] = 0;
 312     s->regs[ECC_DR] = 0;
 313     s->regs[ECC_ECR0] = 0;
 314     s->regs[ECC_ECR1] = 0;
 315 }
 316
 317 void * ecc_init(target_phys_addr_t base, qemu_irq irq, uint32_t version)
 318 {
 319     int ecc_io_memory;
 320     ECCState *s;
 321
 322     s = qemu_mallocz(sizeof(ECCState));
 323
 324     s->version = version;
 325     s->regs[0] = version;
 326     s->irq = irq;
 327
 328     ecc_io_memory = cpu_register_io_memory(0, ecc_mem_read, ecc_mem_write, s);
 329     cpu_register_physical_memory(base, ECC_SIZE, ecc_io_memory);
 330     if (version == ECC_MCC) { // SS-600MP only
 331         ecc_io_memory = cpu_register_io_memory(0, ecc_diag_mem_read,
 332                                                ecc_diag_mem_write, s);
 333         cpu_register_physical_memory(base + 0x1000, ECC_DIAG_SIZE,
 334                                      ecc_io_memory);
 335     }
 336     register_savevm("ECC", base, 3, ecc_save, ecc_load, s);
 337     qemu_register_reset(ecc_reset, 0, s);
 338     ecc_reset(s);
 339     return s;
 340 }