1 /* 2 * QEMU PowerPC PowerNV LPC controller 3 * 4 * Copyright (c) 2016, IBM Corporation. 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "qemu/osdep.h" 21 #include "target/ppc/cpu.h" 22 #include "qapi/error.h" 23 #include "qemu/log.h" 24 #include "qemu/module.h" 25 #include "hw/irq.h" 26 #include "hw/isa/isa.h" 27 28 #include "hw/ppc/pnv.h" 29 #include "hw/ppc/pnv_lpc.h" 30 #include "hw/ppc/pnv_xscom.h" 31 #include "hw/ppc/fdt.h" 32 33 #include <libfdt.h> 34 35 enum { 36 ECCB_CTL = 0, 37 ECCB_RESET = 1, 38 ECCB_STAT = 2, 39 ECCB_DATA = 3, 40 }; 41 42 /* OPB Master LS registers */ 43 #define OPB_MASTER_LS_ROUTE0 0x8 44 #define OPB_MASTER_LS_ROUTE1 0xC 45 #define OPB_MASTER_LS_IRQ_STAT 0x50 46 #define OPB_MASTER_IRQ_LPC 0x00000800 47 #define OPB_MASTER_LS_IRQ_MASK 0x54 48 #define OPB_MASTER_LS_IRQ_POL 0x58 49 #define OPB_MASTER_LS_IRQ_INPUT 0x5c 50 51 /* LPC HC registers */ 52 #define LPC_HC_FW_SEG_IDSEL 0x24 53 #define LPC_HC_FW_RD_ACC_SIZE 0x28 54 #define LPC_HC_FW_RD_1B 0x00000000 55 #define LPC_HC_FW_RD_2B 0x01000000 56 #define LPC_HC_FW_RD_4B 0x02000000 57 #define LPC_HC_FW_RD_16B 0x04000000 58 #define LPC_HC_FW_RD_128B 0x07000000 59 #define LPC_HC_IRQSER_CTRL 0x30 60 #define LPC_HC_IRQSER_EN 0x80000000 61 #define LPC_HC_IRQSER_QMODE 0x40000000 62 #define LPC_HC_IRQSER_START_MASK 0x03000000 63 #define LPC_HC_IRQSER_START_4CLK 0x00000000 64 #define LPC_HC_IRQSER_START_6CLK 0x01000000 65 #define LPC_HC_IRQSER_START_8CLK 0x02000000 66 #define LPC_HC_IRQMASK 0x34 /* same bit defs as LPC_HC_IRQSTAT */ 67 #define LPC_HC_IRQSTAT 0x38 68 #define LPC_HC_IRQ_SERIRQ0 0x80000000 /* all bits down to ... */ 69 #define LPC_HC_IRQ_SERIRQ16 0x00008000 /* IRQ16=IOCHK#, IRQ2=SMI# */ 70 #define LPC_HC_IRQ_SERIRQ_ALL 0xffff8000 71 #define LPC_HC_IRQ_LRESET 0x00000400 72 #define LPC_HC_IRQ_SYNC_ABNORM_ERR 0x00000080 73 #define LPC_HC_IRQ_SYNC_NORESP_ERR 0x00000040 74 #define LPC_HC_IRQ_SYNC_NORM_ERR 0x00000020 75 #define LPC_HC_IRQ_SYNC_TIMEOUT_ERR 0x00000010 76 #define LPC_HC_IRQ_SYNC_TARG_TAR_ERR 0x00000008 77 #define LPC_HC_IRQ_SYNC_BM_TAR_ERR 0x00000004 78 #define LPC_HC_IRQ_SYNC_BM0_REQ 0x00000002 79 #define LPC_HC_IRQ_SYNC_BM1_REQ 0x00000001 80 #define LPC_HC_ERROR_ADDRESS 0x40 81 82 #define LPC_OPB_SIZE 0x100000000ull 83 84 #define ISA_IO_SIZE 0x00010000 85 #define ISA_MEM_SIZE 0x10000000 86 #define ISA_FW_SIZE 0x10000000 87 #define LPC_IO_OPB_ADDR 0xd0010000 88 #define LPC_IO_OPB_SIZE 0x00010000 89 #define LPC_MEM_OPB_ADDR 0xe0010000 90 #define LPC_MEM_OPB_SIZE 0x10000000 91 #define LPC_FW_OPB_ADDR 0xf0000000 92 #define LPC_FW_OPB_SIZE 0x10000000 93 94 #define LPC_OPB_REGS_OPB_ADDR 0xc0010000 95 #define LPC_OPB_REGS_OPB_SIZE 0x00000060 96 #define LPC_OPB_REGS_OPBA_ADDR 0xc0011000 97 #define LPC_OPB_REGS_OPBA_SIZE 0x00000008 98 #define LPC_HC_REGS_OPB_ADDR 0xc0012000 99 #define LPC_HC_REGS_OPB_SIZE 0x00000100 100 101 static int pnv_lpc_dt_xscom(PnvXScomInterface *dev, void *fdt, int xscom_offset) 102 { 103 const char compat[] = "ibm,power8-lpc\0ibm,lpc"; 104 char *name; 105 int offset; 106 uint32_t lpc_pcba = PNV_XSCOM_LPC_BASE; 107 uint32_t reg[] = { 108 cpu_to_be32(lpc_pcba), 109 cpu_to_be32(PNV_XSCOM_LPC_SIZE) 110 }; 111 112 name = g_strdup_printf("isa@%x", lpc_pcba); 113 offset = fdt_add_subnode(fdt, xscom_offset, name); 114 _FDT(offset); 115 g_free(name); 116 117 _FDT((fdt_setprop(fdt, offset, "reg", reg, sizeof(reg)))); 118 _FDT((fdt_setprop_cell(fdt, offset, "#address-cells", 2))); 119 _FDT((fdt_setprop_cell(fdt, offset, "#size-cells", 1))); 120 _FDT((fdt_setprop(fdt, offset, "compatible", compat, sizeof(compat)))); 121 return 0; 122 } 123 124 /* POWER9 only */ 125 int pnv_dt_lpc(PnvChip *chip, void *fdt, int root_offset) 126 { 127 const char compat[] = "ibm,power9-lpcm-opb\0simple-bus"; 128 const char lpc_compat[] = "ibm,power9-lpc\0ibm,lpc"; 129 char *name; 130 int offset, lpcm_offset; 131 uint64_t lpcm_addr = PNV9_LPCM_BASE(chip); 132 uint32_t opb_ranges[8] = { 0, 133 cpu_to_be32(lpcm_addr >> 32), 134 cpu_to_be32((uint32_t)lpcm_addr), 135 cpu_to_be32(PNV9_LPCM_SIZE / 2), 136 cpu_to_be32(PNV9_LPCM_SIZE / 2), 137 cpu_to_be32(lpcm_addr >> 32), 138 cpu_to_be32(PNV9_LPCM_SIZE / 2), 139 cpu_to_be32(PNV9_LPCM_SIZE / 2), 140 }; 141 uint32_t opb_reg[4] = { cpu_to_be32(lpcm_addr >> 32), 142 cpu_to_be32((uint32_t)lpcm_addr), 143 cpu_to_be32(PNV9_LPCM_SIZE >> 32), 144 cpu_to_be32((uint32_t)PNV9_LPCM_SIZE), 145 }; 146 uint32_t reg[2]; 147 148 /* 149 * OPB bus 150 */ 151 name = g_strdup_printf("lpcm-opb@%"PRIx64, lpcm_addr); 152 lpcm_offset = fdt_add_subnode(fdt, root_offset, name); 153 _FDT(lpcm_offset); 154 g_free(name); 155 156 _FDT((fdt_setprop(fdt, lpcm_offset, "reg", opb_reg, sizeof(opb_reg)))); 157 _FDT((fdt_setprop_cell(fdt, lpcm_offset, "#address-cells", 1))); 158 _FDT((fdt_setprop_cell(fdt, lpcm_offset, "#size-cells", 1))); 159 _FDT((fdt_setprop(fdt, lpcm_offset, "compatible", compat, sizeof(compat)))); 160 _FDT((fdt_setprop_cell(fdt, lpcm_offset, "ibm,chip-id", chip->chip_id))); 161 _FDT((fdt_setprop(fdt, lpcm_offset, "ranges", opb_ranges, 162 sizeof(opb_ranges)))); 163 164 /* 165 * OPB Master registers 166 */ 167 name = g_strdup_printf("opb-master@%x", LPC_OPB_REGS_OPB_ADDR); 168 offset = fdt_add_subnode(fdt, lpcm_offset, name); 169 _FDT(offset); 170 g_free(name); 171 172 reg[0] = cpu_to_be32(LPC_OPB_REGS_OPB_ADDR); 173 reg[1] = cpu_to_be32(LPC_OPB_REGS_OPB_SIZE); 174 _FDT((fdt_setprop(fdt, offset, "reg", reg, sizeof(reg)))); 175 _FDT((fdt_setprop_string(fdt, offset, "compatible", 176 "ibm,power9-lpcm-opb-master"))); 177 178 /* 179 * OPB arbitrer registers 180 */ 181 name = g_strdup_printf("opb-arbitrer@%x", LPC_OPB_REGS_OPBA_ADDR); 182 offset = fdt_add_subnode(fdt, lpcm_offset, name); 183 _FDT(offset); 184 g_free(name); 185 186 reg[0] = cpu_to_be32(LPC_OPB_REGS_OPBA_ADDR); 187 reg[1] = cpu_to_be32(LPC_OPB_REGS_OPBA_SIZE); 188 _FDT((fdt_setprop(fdt, offset, "reg", reg, sizeof(reg)))); 189 _FDT((fdt_setprop_string(fdt, offset, "compatible", 190 "ibm,power9-lpcm-opb-arbiter"))); 191 192 /* 193 * LPC Host Controller registers 194 */ 195 name = g_strdup_printf("lpc-controller@%x", LPC_HC_REGS_OPB_ADDR); 196 offset = fdt_add_subnode(fdt, lpcm_offset, name); 197 _FDT(offset); 198 g_free(name); 199 200 reg[0] = cpu_to_be32(LPC_HC_REGS_OPB_ADDR); 201 reg[1] = cpu_to_be32(LPC_HC_REGS_OPB_SIZE); 202 _FDT((fdt_setprop(fdt, offset, "reg", reg, sizeof(reg)))); 203 _FDT((fdt_setprop_string(fdt, offset, "compatible", 204 "ibm,power9-lpc-controller"))); 205 206 name = g_strdup_printf("lpc@0"); 207 offset = fdt_add_subnode(fdt, lpcm_offset, name); 208 _FDT(offset); 209 g_free(name); 210 _FDT((fdt_setprop_cell(fdt, offset, "#address-cells", 2))); 211 _FDT((fdt_setprop_cell(fdt, offset, "#size-cells", 1))); 212 _FDT((fdt_setprop(fdt, offset, "compatible", lpc_compat, 213 sizeof(lpc_compat)))); 214 215 return 0; 216 } 217 218 /* 219 * These read/write handlers of the OPB address space should be common 220 * with the P9 LPC Controller which uses direct MMIOs. 221 * 222 * TODO: rework to use address_space_stq() and address_space_ldq() 223 * instead. 224 */ 225 static bool opb_read(PnvLpcController *lpc, uint32_t addr, uint8_t *data, 226 int sz) 227 { 228 /* XXX Handle access size limits and FW read caching here */ 229 return !address_space_rw(&lpc->opb_as, addr, MEMTXATTRS_UNSPECIFIED, 230 data, sz, false); 231 } 232 233 static bool opb_write(PnvLpcController *lpc, uint32_t addr, uint8_t *data, 234 int sz) 235 { 236 /* XXX Handle access size limits here */ 237 return !address_space_rw(&lpc->opb_as, addr, MEMTXATTRS_UNSPECIFIED, 238 data, sz, true); 239 } 240 241 #define ECCB_CTL_READ PPC_BIT(15) 242 #define ECCB_CTL_SZ_LSH (63 - 7) 243 #define ECCB_CTL_SZ_MASK PPC_BITMASK(4, 7) 244 #define ECCB_CTL_ADDR_MASK PPC_BITMASK(32, 63) 245 246 #define ECCB_STAT_OP_DONE PPC_BIT(52) 247 #define ECCB_STAT_OP_ERR PPC_BIT(52) 248 #define ECCB_STAT_RD_DATA_LSH (63 - 37) 249 #define ECCB_STAT_RD_DATA_MASK (0xffffffff << ECCB_STAT_RD_DATA_LSH) 250 251 static void pnv_lpc_do_eccb(PnvLpcController *lpc, uint64_t cmd) 252 { 253 /* XXX Check for magic bits at the top, addr size etc... */ 254 unsigned int sz = (cmd & ECCB_CTL_SZ_MASK) >> ECCB_CTL_SZ_LSH; 255 uint32_t opb_addr = cmd & ECCB_CTL_ADDR_MASK; 256 uint8_t data[8]; 257 bool success; 258 259 if (sz > sizeof(data)) { 260 qemu_log_mask(LOG_GUEST_ERROR, 261 "ECCB: invalid operation at @0x%08x size %d\n", opb_addr, sz); 262 return; 263 } 264 265 if (cmd & ECCB_CTL_READ) { 266 success = opb_read(lpc, opb_addr, data, sz); 267 if (success) { 268 lpc->eccb_stat_reg = ECCB_STAT_OP_DONE | 269 (((uint64_t)data[0]) << 24 | 270 ((uint64_t)data[1]) << 16 | 271 ((uint64_t)data[2]) << 8 | 272 ((uint64_t)data[3])) << ECCB_STAT_RD_DATA_LSH; 273 } else { 274 lpc->eccb_stat_reg = ECCB_STAT_OP_DONE | 275 (0xffffffffull << ECCB_STAT_RD_DATA_LSH); 276 } 277 } else { 278 data[0] = lpc->eccb_data_reg >> 24; 279 data[1] = lpc->eccb_data_reg >> 16; 280 data[2] = lpc->eccb_data_reg >> 8; 281 data[3] = lpc->eccb_data_reg; 282 283 success = opb_write(lpc, opb_addr, data, sz); 284 lpc->eccb_stat_reg = ECCB_STAT_OP_DONE; 285 } 286 /* XXX Which error bit (if any) to signal OPB error ? */ 287 } 288 289 static uint64_t pnv_lpc_xscom_read(void *opaque, hwaddr addr, unsigned size) 290 { 291 PnvLpcController *lpc = PNV_LPC(opaque); 292 uint32_t offset = addr >> 3; 293 uint64_t val = 0; 294 295 switch (offset & 3) { 296 case ECCB_CTL: 297 case ECCB_RESET: 298 val = 0; 299 break; 300 case ECCB_STAT: 301 val = lpc->eccb_stat_reg; 302 lpc->eccb_stat_reg = 0; 303 break; 304 case ECCB_DATA: 305 val = ((uint64_t)lpc->eccb_data_reg) << 32; 306 break; 307 } 308 return val; 309 } 310 311 static void pnv_lpc_xscom_write(void *opaque, hwaddr addr, 312 uint64_t val, unsigned size) 313 { 314 PnvLpcController *lpc = PNV_LPC(opaque); 315 uint32_t offset = addr >> 3; 316 317 switch (offset & 3) { 318 case ECCB_CTL: 319 pnv_lpc_do_eccb(lpc, val); 320 break; 321 case ECCB_RESET: 322 /* XXXX */ 323 break; 324 case ECCB_STAT: 325 break; 326 case ECCB_DATA: 327 lpc->eccb_data_reg = val >> 32; 328 break; 329 } 330 } 331 332 static const MemoryRegionOps pnv_lpc_xscom_ops = { 333 .read = pnv_lpc_xscom_read, 334 .write = pnv_lpc_xscom_write, 335 .valid.min_access_size = 8, 336 .valid.max_access_size = 8, 337 .impl.min_access_size = 8, 338 .impl.max_access_size = 8, 339 .endianness = DEVICE_BIG_ENDIAN, 340 }; 341 342 static uint64_t pnv_lpc_mmio_read(void *opaque, hwaddr addr, unsigned size) 343 { 344 PnvLpcController *lpc = PNV_LPC(opaque); 345 uint64_t val = 0; 346 uint32_t opb_addr = addr & ECCB_CTL_ADDR_MASK; 347 MemTxResult result; 348 349 switch (size) { 350 case 4: 351 val = address_space_ldl(&lpc->opb_as, opb_addr, MEMTXATTRS_UNSPECIFIED, 352 &result); 353 break; 354 case 1: 355 val = address_space_ldub(&lpc->opb_as, opb_addr, MEMTXATTRS_UNSPECIFIED, 356 &result); 357 break; 358 default: 359 qemu_log_mask(LOG_GUEST_ERROR, "OPB read failed at @0x%" 360 HWADDR_PRIx " invalid size %d\n", addr, size); 361 return 0; 362 } 363 364 if (result != MEMTX_OK) { 365 qemu_log_mask(LOG_GUEST_ERROR, "OPB read failed at @0x%" 366 HWADDR_PRIx "\n", addr); 367 } 368 369 return val; 370 } 371 372 static void pnv_lpc_mmio_write(void *opaque, hwaddr addr, 373 uint64_t val, unsigned size) 374 { 375 PnvLpcController *lpc = PNV_LPC(opaque); 376 uint32_t opb_addr = addr & ECCB_CTL_ADDR_MASK; 377 MemTxResult result; 378 379 switch (size) { 380 case 4: 381 address_space_stl(&lpc->opb_as, opb_addr, val, MEMTXATTRS_UNSPECIFIED, 382 &result); 383 break; 384 case 1: 385 address_space_stb(&lpc->opb_as, opb_addr, val, MEMTXATTRS_UNSPECIFIED, 386 &result); 387 break; 388 default: 389 qemu_log_mask(LOG_GUEST_ERROR, "OPB write failed at @0x%" 390 HWADDR_PRIx " invalid size %d\n", addr, size); 391 return; 392 } 393 394 if (result != MEMTX_OK) { 395 qemu_log_mask(LOG_GUEST_ERROR, "OPB write failed at @0x%" 396 HWADDR_PRIx "\n", addr); 397 } 398 } 399 400 static const MemoryRegionOps pnv_lpc_mmio_ops = { 401 .read = pnv_lpc_mmio_read, 402 .write = pnv_lpc_mmio_write, 403 .impl = { 404 .min_access_size = 1, 405 .max_access_size = 4, 406 }, 407 .endianness = DEVICE_BIG_ENDIAN, 408 }; 409 410 static void pnv_lpc_eval_irqs(PnvLpcController *lpc) 411 { 412 bool lpc_to_opb_irq = false; 413 PnvLpcClass *plc = PNV_LPC_GET_CLASS(lpc); 414 415 /* Update LPC controller to OPB line */ 416 if (lpc->lpc_hc_irqser_ctrl & LPC_HC_IRQSER_EN) { 417 uint32_t irqs; 418 419 irqs = lpc->lpc_hc_irqstat & lpc->lpc_hc_irqmask; 420 lpc_to_opb_irq = (irqs != 0); 421 } 422 423 /* We don't honor the polarity register, it's pointless and unused 424 * anyway 425 */ 426 if (lpc_to_opb_irq) { 427 lpc->opb_irq_input |= OPB_MASTER_IRQ_LPC; 428 } else { 429 lpc->opb_irq_input &= ~OPB_MASTER_IRQ_LPC; 430 } 431 432 /* Update OPB internal latch */ 433 lpc->opb_irq_stat |= lpc->opb_irq_input & lpc->opb_irq_mask; 434 435 /* Reflect the interrupt */ 436 pnv_psi_irq_set(lpc->psi, plc->psi_irq, lpc->opb_irq_stat != 0); 437 } 438 439 static uint64_t lpc_hc_read(void *opaque, hwaddr addr, unsigned size) 440 { 441 PnvLpcController *lpc = opaque; 442 uint64_t val = 0xfffffffffffffffful; 443 444 switch (addr) { 445 case LPC_HC_FW_SEG_IDSEL: 446 val = lpc->lpc_hc_fw_seg_idsel; 447 break; 448 case LPC_HC_FW_RD_ACC_SIZE: 449 val = lpc->lpc_hc_fw_rd_acc_size; 450 break; 451 case LPC_HC_IRQSER_CTRL: 452 val = lpc->lpc_hc_irqser_ctrl; 453 break; 454 case LPC_HC_IRQMASK: 455 val = lpc->lpc_hc_irqmask; 456 break; 457 case LPC_HC_IRQSTAT: 458 val = lpc->lpc_hc_irqstat; 459 break; 460 case LPC_HC_ERROR_ADDRESS: 461 val = lpc->lpc_hc_error_addr; 462 break; 463 default: 464 qemu_log_mask(LOG_UNIMP, "LPC HC Unimplemented register: 0x%" 465 HWADDR_PRIx "\n", addr); 466 } 467 return val; 468 } 469 470 static void lpc_hc_write(void *opaque, hwaddr addr, uint64_t val, 471 unsigned size) 472 { 473 PnvLpcController *lpc = opaque; 474 475 /* XXX Filter out reserved bits */ 476 477 switch (addr) { 478 case LPC_HC_FW_SEG_IDSEL: 479 /* XXX Actually figure out how that works as this impact 480 * memory regions/aliases 481 */ 482 lpc->lpc_hc_fw_seg_idsel = val; 483 break; 484 case LPC_HC_FW_RD_ACC_SIZE: 485 lpc->lpc_hc_fw_rd_acc_size = val; 486 break; 487 case LPC_HC_IRQSER_CTRL: 488 lpc->lpc_hc_irqser_ctrl = val; 489 pnv_lpc_eval_irqs(lpc); 490 break; 491 case LPC_HC_IRQMASK: 492 lpc->lpc_hc_irqmask = val; 493 pnv_lpc_eval_irqs(lpc); 494 break; 495 case LPC_HC_IRQSTAT: 496 lpc->lpc_hc_irqstat &= ~val; 497 pnv_lpc_eval_irqs(lpc); 498 break; 499 case LPC_HC_ERROR_ADDRESS: 500 break; 501 default: 502 qemu_log_mask(LOG_UNIMP, "LPC HC Unimplemented register: 0x%" 503 HWADDR_PRIx "\n", addr); 504 } 505 } 506 507 static const MemoryRegionOps lpc_hc_ops = { 508 .read = lpc_hc_read, 509 .write = lpc_hc_write, 510 .endianness = DEVICE_BIG_ENDIAN, 511 .valid = { 512 .min_access_size = 4, 513 .max_access_size = 4, 514 }, 515 .impl = { 516 .min_access_size = 4, 517 .max_access_size = 4, 518 }, 519 }; 520 521 static uint64_t opb_master_read(void *opaque, hwaddr addr, unsigned size) 522 { 523 PnvLpcController *lpc = opaque; 524 uint64_t val = 0xfffffffffffffffful; 525 526 switch (addr) { 527 case OPB_MASTER_LS_ROUTE0: /* TODO */ 528 val = lpc->opb_irq_route0; 529 break; 530 case OPB_MASTER_LS_ROUTE1: /* TODO */ 531 val = lpc->opb_irq_route1; 532 break; 533 case OPB_MASTER_LS_IRQ_STAT: 534 val = lpc->opb_irq_stat; 535 break; 536 case OPB_MASTER_LS_IRQ_MASK: 537 val = lpc->opb_irq_mask; 538 break; 539 case OPB_MASTER_LS_IRQ_POL: 540 val = lpc->opb_irq_pol; 541 break; 542 case OPB_MASTER_LS_IRQ_INPUT: 543 val = lpc->opb_irq_input; 544 break; 545 default: 546 qemu_log_mask(LOG_UNIMP, "OPBM: read on unimplemented register: 0x%" 547 HWADDR_PRIx "\n", addr); 548 } 549 550 return val; 551 } 552 553 static void opb_master_write(void *opaque, hwaddr addr, 554 uint64_t val, unsigned size) 555 { 556 PnvLpcController *lpc = opaque; 557 558 switch (addr) { 559 case OPB_MASTER_LS_ROUTE0: /* TODO */ 560 lpc->opb_irq_route0 = val; 561 break; 562 case OPB_MASTER_LS_ROUTE1: /* TODO */ 563 lpc->opb_irq_route1 = val; 564 break; 565 case OPB_MASTER_LS_IRQ_STAT: 566 lpc->opb_irq_stat &= ~val; 567 pnv_lpc_eval_irqs(lpc); 568 break; 569 case OPB_MASTER_LS_IRQ_MASK: 570 lpc->opb_irq_mask = val; 571 pnv_lpc_eval_irqs(lpc); 572 break; 573 case OPB_MASTER_LS_IRQ_POL: 574 lpc->opb_irq_pol = val; 575 pnv_lpc_eval_irqs(lpc); 576 break; 577 case OPB_MASTER_LS_IRQ_INPUT: 578 /* Read only */ 579 break; 580 default: 581 qemu_log_mask(LOG_UNIMP, "OPBM: write on unimplemented register: 0x%" 582 HWADDR_PRIx " val=0x%08"PRIx64"\n", addr, val); 583 } 584 } 585 586 static const MemoryRegionOps opb_master_ops = { 587 .read = opb_master_read, 588 .write = opb_master_write, 589 .endianness = DEVICE_BIG_ENDIAN, 590 .valid = { 591 .min_access_size = 4, 592 .max_access_size = 4, 593 }, 594 .impl = { 595 .min_access_size = 4, 596 .max_access_size = 4, 597 }, 598 }; 599 600 static void pnv_lpc_power8_realize(DeviceState *dev, Error **errp) 601 { 602 PnvLpcController *lpc = PNV_LPC(dev); 603 PnvLpcClass *plc = PNV_LPC_GET_CLASS(dev); 604 Error *local_err = NULL; 605 606 plc->parent_realize(dev, &local_err); 607 if (local_err) { 608 error_propagate(errp, local_err); 609 return; 610 } 611 612 /* P8 uses a XSCOM region for LPC registers */ 613 pnv_xscom_region_init(&lpc->xscom_regs, OBJECT(lpc), 614 &pnv_lpc_xscom_ops, lpc, "xscom-lpc", 615 PNV_XSCOM_LPC_SIZE); 616 } 617 618 static void pnv_lpc_power8_class_init(ObjectClass *klass, void *data) 619 { 620 DeviceClass *dc = DEVICE_CLASS(klass); 621 PnvXScomInterfaceClass *xdc = PNV_XSCOM_INTERFACE_CLASS(klass); 622 PnvLpcClass *plc = PNV_LPC_CLASS(klass); 623 624 dc->desc = "PowerNV LPC Controller POWER8"; 625 626 xdc->dt_xscom = pnv_lpc_dt_xscom; 627 628 plc->psi_irq = PSIHB_IRQ_LPC_I2C; 629 630 device_class_set_parent_realize(dc, pnv_lpc_power8_realize, 631 &plc->parent_realize); 632 } 633 634 static const TypeInfo pnv_lpc_power8_info = { 635 .name = TYPE_PNV8_LPC, 636 .parent = TYPE_PNV_LPC, 637 .instance_size = sizeof(PnvLpcController), 638 .class_init = pnv_lpc_power8_class_init, 639 .interfaces = (InterfaceInfo[]) { 640 { TYPE_PNV_XSCOM_INTERFACE }, 641 { } 642 } 643 }; 644 645 static void pnv_lpc_power9_realize(DeviceState *dev, Error **errp) 646 { 647 PnvLpcController *lpc = PNV_LPC(dev); 648 PnvLpcClass *plc = PNV_LPC_GET_CLASS(dev); 649 Error *local_err = NULL; 650 651 plc->parent_realize(dev, &local_err); 652 if (local_err) { 653 error_propagate(errp, local_err); 654 return; 655 } 656 657 /* P9 uses a MMIO region */ 658 memory_region_init_io(&lpc->xscom_regs, OBJECT(lpc), &pnv_lpc_mmio_ops, 659 lpc, "lpcm", PNV9_LPCM_SIZE); 660 } 661 662 static void pnv_lpc_power9_class_init(ObjectClass *klass, void *data) 663 { 664 DeviceClass *dc = DEVICE_CLASS(klass); 665 PnvLpcClass *plc = PNV_LPC_CLASS(klass); 666 667 dc->desc = "PowerNV LPC Controller POWER9"; 668 669 plc->psi_irq = PSIHB9_IRQ_LPCHC; 670 671 device_class_set_parent_realize(dc, pnv_lpc_power9_realize, 672 &plc->parent_realize); 673 } 674 675 static const TypeInfo pnv_lpc_power9_info = { 676 .name = TYPE_PNV9_LPC, 677 .parent = TYPE_PNV_LPC, 678 .instance_size = sizeof(PnvLpcController), 679 .class_init = pnv_lpc_power9_class_init, 680 }; 681 682 static void pnv_lpc_realize(DeviceState *dev, Error **errp) 683 { 684 PnvLpcController *lpc = PNV_LPC(dev); 685 Object *obj; 686 Error *local_err = NULL; 687 688 obj = object_property_get_link(OBJECT(dev), "psi", &local_err); 689 if (!obj) { 690 error_propagate(errp, local_err); 691 error_prepend(errp, "required link 'psi' not found: "); 692 return; 693 } 694 /* The LPC controller needs PSI to generate interrupts */ 695 lpc->psi = PNV_PSI(obj); 696 697 /* Reg inits */ 698 lpc->lpc_hc_fw_rd_acc_size = LPC_HC_FW_RD_4B; 699 700 /* Create address space and backing MR for the OPB bus */ 701 memory_region_init(&lpc->opb_mr, OBJECT(dev), "lpc-opb", 0x100000000ull); 702 address_space_init(&lpc->opb_as, &lpc->opb_mr, "lpc-opb"); 703 704 /* Create ISA IO and Mem space regions which are the root of 705 * the ISA bus (ie, ISA address spaces). We don't create a 706 * separate one for FW which we alias to memory. 707 */ 708 memory_region_init(&lpc->isa_io, OBJECT(dev), "isa-io", ISA_IO_SIZE); 709 memory_region_init(&lpc->isa_mem, OBJECT(dev), "isa-mem", ISA_MEM_SIZE); 710 memory_region_init(&lpc->isa_fw, OBJECT(dev), "isa-fw", ISA_FW_SIZE); 711 712 /* Create windows from the OPB space to the ISA space */ 713 memory_region_init_alias(&lpc->opb_isa_io, OBJECT(dev), "lpc-isa-io", 714 &lpc->isa_io, 0, LPC_IO_OPB_SIZE); 715 memory_region_add_subregion(&lpc->opb_mr, LPC_IO_OPB_ADDR, 716 &lpc->opb_isa_io); 717 memory_region_init_alias(&lpc->opb_isa_mem, OBJECT(dev), "lpc-isa-mem", 718 &lpc->isa_mem, 0, LPC_MEM_OPB_SIZE); 719 memory_region_add_subregion(&lpc->opb_mr, LPC_MEM_OPB_ADDR, 720 &lpc->opb_isa_mem); 721 memory_region_init_alias(&lpc->opb_isa_fw, OBJECT(dev), "lpc-isa-fw", 722 &lpc->isa_fw, 0, LPC_FW_OPB_SIZE); 723 memory_region_add_subregion(&lpc->opb_mr, LPC_FW_OPB_ADDR, 724 &lpc->opb_isa_fw); 725 726 /* Create MMIO regions for LPC HC and OPB registers */ 727 memory_region_init_io(&lpc->opb_master_regs, OBJECT(dev), &opb_master_ops, 728 lpc, "lpc-opb-master", LPC_OPB_REGS_OPB_SIZE); 729 memory_region_add_subregion(&lpc->opb_mr, LPC_OPB_REGS_OPB_ADDR, 730 &lpc->opb_master_regs); 731 memory_region_init_io(&lpc->lpc_hc_regs, OBJECT(dev), &lpc_hc_ops, lpc, 732 "lpc-hc", LPC_HC_REGS_OPB_SIZE); 733 memory_region_add_subregion(&lpc->opb_mr, LPC_HC_REGS_OPB_ADDR, 734 &lpc->lpc_hc_regs); 735 } 736 737 static void pnv_lpc_class_init(ObjectClass *klass, void *data) 738 { 739 DeviceClass *dc = DEVICE_CLASS(klass); 740 741 dc->realize = pnv_lpc_realize; 742 dc->desc = "PowerNV LPC Controller"; 743 } 744 745 static const TypeInfo pnv_lpc_info = { 746 .name = TYPE_PNV_LPC, 747 .parent = TYPE_DEVICE, 748 .class_init = pnv_lpc_class_init, 749 .class_size = sizeof(PnvLpcClass), 750 .abstract = true, 751 }; 752 753 static void pnv_lpc_register_types(void) 754 { 755 type_register_static(&pnv_lpc_info); 756 type_register_static(&pnv_lpc_power8_info); 757 type_register_static(&pnv_lpc_power9_info); 758 } 759 760 type_init(pnv_lpc_register_types) 761 762 /* If we don't use the built-in LPC interrupt deserializer, we need 763 * to provide a set of qirqs for the ISA bus or things will go bad. 764 * 765 * Most machines using pre-Naples chips (without said deserializer) 766 * have a CPLD that will collect the SerIRQ and shoot them as a 767 * single level interrupt to the P8 chip. So let's setup a hook 768 * for doing just that. 769 */ 770 static void pnv_lpc_isa_irq_handler_cpld(void *opaque, int n, int level) 771 { 772 PnvMachineState *pnv = PNV_MACHINE(qdev_get_machine()); 773 uint32_t old_state = pnv->cpld_irqstate; 774 PnvLpcController *lpc = PNV_LPC(opaque); 775 776 if (level) { 777 pnv->cpld_irqstate |= 1u << n; 778 } else { 779 pnv->cpld_irqstate &= ~(1u << n); 780 } 781 782 if (pnv->cpld_irqstate != old_state) { 783 pnv_psi_irq_set(lpc->psi, PSIHB_IRQ_EXTERNAL, pnv->cpld_irqstate != 0); 784 } 785 } 786 787 static void pnv_lpc_isa_irq_handler(void *opaque, int n, int level) 788 { 789 PnvLpcController *lpc = PNV_LPC(opaque); 790 791 /* The Naples HW latches the 1 levels, clearing is done by SW */ 792 if (level) { 793 lpc->lpc_hc_irqstat |= LPC_HC_IRQ_SERIRQ0 >> n; 794 pnv_lpc_eval_irqs(lpc); 795 } 796 } 797 798 ISABus *pnv_lpc_isa_create(PnvLpcController *lpc, bool use_cpld, Error **errp) 799 { 800 Error *local_err = NULL; 801 ISABus *isa_bus; 802 qemu_irq *irqs; 803 qemu_irq_handler handler; 804 805 /* let isa_bus_new() create its own bridge on SysBus otherwise 806 * devices speficied on the command line won't find the bus and 807 * will fail to create. 808 */ 809 isa_bus = isa_bus_new(NULL, &lpc->isa_mem, &lpc->isa_io, &local_err); 810 if (local_err) { 811 error_propagate(errp, local_err); 812 return NULL; 813 } 814 815 /* Not all variants have a working serial irq decoder. If not, 816 * handling of LPC interrupts becomes a platform issue (some 817 * platforms have a CPLD to do it). 818 */ 819 if (use_cpld) { 820 handler = pnv_lpc_isa_irq_handler_cpld; 821 } else { 822 handler = pnv_lpc_isa_irq_handler; 823 } 824 825 irqs = qemu_allocate_irqs(handler, lpc, ISA_NUM_IRQS); 826 827 isa_bus_irqs(isa_bus, irqs); 828 return isa_bus; 829 } 830