1 /* $NetBSD: rmixl_cpu.c,v 1.6 2013/11/25 03:01:58 christos Exp $ */ 2 3 /* 4 * Copyright 2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Simon Burge for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include "locators.h" 39 40 #include <sys/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: rmixl_cpu.c,v 1.6 2013/11/25 03:01:58 christos Exp $"); 42 43 #include "opt_multiprocessor.h" 44 #include "opt_ddb.h" 45 46 #include <sys/param.h> 47 #include <sys/device.h> 48 #include <sys/systm.h> 49 #include <sys/cpu.h> 50 #include <sys/lock.h> 51 #include <sys/lwp.h> 52 #include <sys/cpu.h> 53 #include <sys/malloc.h> 54 #include <uvm/uvm_pglist.h> 55 #include <uvm/uvm_extern.h> 56 #include <mips/regnum.h> 57 #include <mips/asm.h> 58 #include <mips/pmap.h> 59 #include <mips/rmi/rmixlreg.h> 60 #include <mips/rmi/rmixlvar.h> 61 #include <mips/rmi/rmixl_cpucorevar.h> 62 #include <mips/rmi/rmixl_cpuvar.h> 63 #include <mips/rmi/rmixl_intr.h> 64 #include <mips/rmi/rmixl_fmnvar.h> 65 #ifdef DDB 66 #include <mips/db_machdep.h> 67 #endif 68 69 70 static int cpu_rmixl_match(device_t, cfdata_t, void *); 71 static void cpu_rmixl_attach(device_t, device_t, void *); 72 static void cpu_rmixl_attach_primary(struct rmixl_cpu_softc * const); 73 #ifdef NOTYET 74 static int cpu_fmn_intr(void *, rmixl_fmn_rxmsg_t *); 75 #endif 76 77 #ifdef MULTIPROCESSOR 78 void cpu_rmixl_hatch(struct cpu_info *); 79 void cpu_rmixl_run(struct cpu_info *); 80 static int cpu_setup_trampoline_common(struct cpu_info *, struct rmixl_cpu_trampoline_args *); 81 static void cpu_setup_trampoline_callback(struct cpu_info *); 82 #endif /* MULTIPROCESSOR */ 83 84 #ifdef DEBUG 85 void rmixl_cpu_data_print(struct cpu_data *); 86 struct cpu_info * 87 rmixl_cpuinfo_print(u_int); 88 #endif /* DEBUG */ 89 90 CFATTACH_DECL_NEW(cpu_rmixl, sizeof(struct rmixl_cpu_softc), 91 cpu_rmixl_match, cpu_rmixl_attach, NULL, NULL); 92 93 #ifdef MULTIPROCESSOR 94 static struct rmixl_cpu_trampoline_args rmixl_cpu_trampoline_args; 95 #endif 96 97 /* 98 * cpu_rmixl_watchpoint_init - initialize COP0 watchpoint stuff 99 * 100 * clear IEU_DEFEATURE[DBE] to ensure T_WATCH on watchpoint exception 101 * set COP0 watchhi and watchlo 102 * 103 * disable all watchpoints 104 */ 105 static void 106 cpu_rmixl_watchpoint_init(void) 107 { 108 uint32_t r; 109 110 r = rmixl_mfcr(RMIXL_PCR_IEU_DEFEATURE); 111 r &= ~__BIT(7); /* DBE */ 112 rmixl_mtcr(RMIXL_PCR_IEU_DEFEATURE, r); 113 114 cpuwatch_clr_all(); 115 } 116 117 /* 118 * cpu_xls616_erratum 119 * 120 * on the XLS616, COUNT/COMPARE clock regs seem to interact between 121 * threads on a core 122 * 123 * the symptom of the error is retarded clock interrupts 124 * and very slow apparent system performance 125 * 126 * other XLS chips may have the same problem. 127 * we may need to add other PID checks. 128 */ 129 static inline bool 130 cpu_xls616_erratum(device_t parent, struct cpucore_attach_args *ca) 131 { 132 #if 0 133 if (mips_options.mips_cpu->cpu_pid == MIPS_XLS616) { 134 if (ca->ca_thread > 0) { 135 aprint_error_dev(parent, "XLS616 CLOCK ERRATUM: " 136 "deconfigure cpu%d\n", ca->ca_thread); 137 return true; 138 } 139 } 140 #endif 141 return false; 142 } 143 144 static bool 145 cpu_rmixl_erratum(device_t parent, struct cpucore_attach_args *ca) 146 { 147 return cpu_xls616_erratum(parent, ca); 148 } 149 150 static int 151 cpu_rmixl_match(device_t parent, cfdata_t cf, void *aux) 152 { 153 struct cpucore_attach_args *ca = aux; 154 int thread = cf->cf_loc[CPUCORECF_THREAD]; 155 156 if (!cpu_rmixl(mips_options.mips_cpu)) 157 return 0; 158 159 if (strncmp(ca->ca_name, cf->cf_name, strlen(cf->cf_name)) == 0 160 #ifndef MULTIPROCESSOR 161 && ca->ca_thread == 0 162 #endif 163 && (thread == CPUCORECF_THREAD_DEFAULT || thread == ca->ca_thread) 164 && (!cpu_rmixl_erratum(parent, ca))) 165 return 1; 166 167 return 0; 168 } 169 170 static void 171 cpu_rmixl_attach(device_t parent, device_t self, void *aux) 172 { 173 struct rmixl_cpu_softc * const sc = device_private(self); 174 struct cpu_info *ci = NULL; 175 static bool once = false; 176 extern void rmixl_spl_init_cpu(void); 177 178 if (once == false) { 179 /* first attach is the primary cpu */ 180 once = true; 181 ci = curcpu(); 182 sc->sc_dev = self; 183 sc->sc_ci = ci; 184 ci->ci_softc = (void *)sc; 185 186 rmixl_spl_init_cpu(); /* spl initialization for CPU#0 */ 187 cpu_rmixl_attach_primary(sc); 188 189 #ifdef MULTIPROCESSOR 190 mips_locoresw.lsw_cpu_init = cpu_rmixl_hatch; 191 mips_locoresw.lsw_cpu_run = cpu_rmixl_run; 192 } else { 193 struct cpucore_attach_args * const ca = aux; 194 struct cpucore_softc * const ccsc = device_private(parent); 195 rmixlfw_psb_type_t psb_type = rmixl_configuration.rc_psb_type; 196 cpuid_t cpuid; 197 198 KASSERT(ca->ca_core < 8); 199 KASSERT(ca->ca_thread < 4); 200 cpuid = (ca->ca_core << 2) | ca->ca_thread; 201 ci = cpu_info_alloc(ccsc->sc_tlbinfo, cpuid, 202 /* XXX */ 0, ca->ca_core, ca->ca_thread); 203 KASSERT(ci != NULL); 204 if (ccsc->sc_tlbinfo == NULL) 205 ccsc->sc_tlbinfo = ci->ci_tlb_info; 206 sc->sc_dev = self; 207 sc->sc_ci = ci; 208 ci->ci_softc = (void *)sc; 209 210 switch (psb_type) { 211 case PSB_TYPE_RMI: 212 case PSB_TYPE_DELL: 213 cpu_setup_trampoline_callback(ci); 214 break; 215 default: 216 aprint_error(": psb type=%s cpu_wakeup unsupported\n", 217 rmixlfw_psb_type_name(psb_type)); 218 return; 219 } 220 221 const u_long cpu_mask = 1L << cpu_index(ci); 222 for (size_t i=0; i < 10000; i++) { 223 if ((cpus_hatched & cpu_mask) != 0) 224 break; 225 DELAY(100); 226 } 227 if ((cpus_hatched & cpu_mask) == 0) { 228 aprint_error(": failed to hatch\n"); 229 return; 230 } 231 #endif /* MULTIPROCESSOR */ 232 } 233 234 /* 235 * do per-cpu interrupt initialization 236 */ 237 rmixl_intr_init_cpu(ci); 238 239 aprint_normal("\n"); 240 241 cpu_attach_common(self, ci); 242 } 243 244 /* 245 * attach the primary processor 246 */ 247 static void 248 cpu_rmixl_attach_primary(struct rmixl_cpu_softc * const sc) 249 { 250 struct cpu_info *ci = sc->sc_ci; 251 uint32_t ebase; 252 253 KASSERT(CPU_IS_PRIMARY(ci)); 254 255 /* 256 * obtain and set cpuid of the primary processor 257 */ 258 asm volatile("dmfc0 %0, $15, 1;" : "=r"(ebase)); 259 ci->ci_cpuid = ebase & __BITS(9,0); 260 261 cpu_rmixl_watchpoint_init(); 262 263 rmixl_fmn_init(); 264 265 rmixl_intr_init_clk(); 266 #ifdef MULTIPROCESSOR 267 rmixl_intr_init_ipi(); 268 #endif 269 270 #ifdef NOTYET 271 void *ih = rmixl_fmn_intr_establish(RMIXL_FMN_STID_CORE0, 272 cpu_fmn_intr, ci); 273 if (ih == NULL) 274 panic("%s: rmixl_fmn_intr_establish failed", 275 __func__); 276 sc->sc_ih_fmn = ih; 277 #endif 278 } 279 280 #ifdef NOTYET 281 static int 282 cpu_fmn_intr(void *arg, rmixl_fmn_rxmsg_t *rxmsg) 283 { 284 if (CPU_IS_PRIMARY(curcpu())) { 285 printf("%s: cpu%ld: rxsid=%#x, code=%d, size=%d\n", 286 __func__, cpu_number(), 287 rxmsg->rxsid, rxmsg->code, rxmsg->size); 288 for (int i=0; i < rxmsg->size; i++) 289 printf("\t%#"PRIx64"\n", rxmsg->msg.data[i]); 290 } 291 292 return 1; 293 } 294 #endif 295 296 #ifdef MULTIPROCESSOR 297 /* 298 * cpu_rmixl_run 299 * 300 * - chip-specific post-running code called from cpu_hatch via lsw_cpu_run 301 */ 302 void 303 cpu_rmixl_run(struct cpu_info *ci) 304 { 305 struct rmixl_cpu_softc * const sc = (void *)ci->ci_softc; 306 cpucore_rmixl_run(device_parent(sc->sc_dev)); 307 } 308 309 /* 310 * cpu_rmixl_hatch 311 * 312 * - chip-specific hatch code called from cpu_hatch via lsw_cpu_init 313 */ 314 void 315 cpu_rmixl_hatch(struct cpu_info *ci) 316 { 317 struct rmixl_cpu_softc * const sc = (void *)ci->ci_softc; 318 extern void rmixl_spl_init_cpu(void); 319 320 rmixl_spl_init_cpu(); /* spl initialization for this CPU */ 321 322 (void)splhigh(); 323 324 #ifdef DEBUG 325 uint32_t ebase; 326 asm volatile("dmfc0 %0, $15, 1;" : "=r"(ebase)); 327 KASSERT((ebase & __BITS(9,0)) == ci->ci_cpuid); 328 KASSERT(curcpu() == ci); 329 #endif 330 331 cpucore_rmixl_hatch(device_parent(sc->sc_dev)); 332 333 cpu_rmixl_watchpoint_init(); 334 } 335 336 static int 337 cpu_setup_trampoline_common(struct cpu_info *ci, struct rmixl_cpu_trampoline_args *ta) 338 { 339 struct lwp *l = ci->ci_data.cpu_idlelwp; 340 uintptr_t stacktop; 341 342 #ifdef DIAGNOSTIC 343 /* Ensure our current stack can be used by the firmware */ 344 uint64_t sp; 345 __asm__ volatile("move %0, $sp\n" : "=r"(sp)); 346 #ifdef _LP64 347 /* can be made into a KSEG0 addr */ 348 KASSERT(MIPS_XKPHYS_P(sp)); 349 KASSERT((MIPS_XKPHYS_TO_PHYS(sp) >> 32) == 0); 350 #else 351 /* is a KSEG0 addr */ 352 KASSERT(MIPS_KSEG0_P(sp)); 353 #endif /* _LP64 */ 354 #endif /* DIAGNOSTIC */ 355 356 #ifndef _LP64 357 /* 358 * Ensure 'ci' is a KSEG0 address for trampoline args 359 * to avoid TLB fault in cpu_trampoline() when loading ci_idlelwp 360 */ 361 KASSERT(MIPS_KSEG0_P(ci)); 362 #endif 363 364 /* 365 * Ensure 'ta' is a KSEG0 address for trampoline args 366 * to avoid TLB fault in trampoline when loading args. 367 * 368 * Note: 369 * RMI firmware only passes the lower 32-bit half of 'ta' 370 * to rmixl_cpu_trampoline (the upper half is clear) 371 * so rmixl_cpu_trampoline must reconstruct the missing upper half 372 * rmixl_cpu_trampoline "knows" 'ta' is a KSEG0 address 373 * and sign-extends to make an LP64 KSEG0 address. 374 */ 375 KASSERT(MIPS_KSEG0_P(ta)); 376 377 /* 378 * marshal args for rmixl_cpu_trampoline; 379 * note for non-LP64 kernel, use of intptr_t 380 * forces sign extension of 32 bit pointers 381 */ 382 stacktop = (uintptr_t)l->l_md.md_utf - CALLFRAME_SIZ; 383 ta->ta_sp = (uint64_t)(intptr_t)stacktop; 384 ta->ta_lwp = (uint64_t)(intptr_t)l; 385 ta->ta_cpuinfo = (uint64_t)(intptr_t)ci; 386 387 return 0; 388 } 389 390 static void 391 cpu_setup_trampoline_callback(struct cpu_info *ci) 392 { 393 void (*wakeup_cpu)(void *, void *, unsigned int); 394 struct rmixl_cpu_trampoline_args *ta = &rmixl_cpu_trampoline_args; 395 extern void rmixl_cpu_trampoline(void *); 396 extern void rmixlfw_wakeup_cpu(void *, void *, u_int64_t, void *); 397 398 cpu_setup_trampoline_common(ci, ta); 399 400 #if _LP64 401 wakeup_cpu = (void *)rmixl_configuration.rc_psb_info.wakeup; 402 #else 403 wakeup_cpu = (void *)(intptr_t) 404 (rmixl_configuration.rc_psb_info.wakeup & 0xffffffff); 405 #endif 406 407 rmixlfw_wakeup_cpu(rmixl_cpu_trampoline, (void *)ta, 408 (uint64_t)1 << ci->ci_cpuid, wakeup_cpu); 409 } 410 #endif /* MULTIPROCESSOR */ 411 412 413 #ifdef DEBUG 414 void 415 rmixl_cpu_data_print(struct cpu_data *dp) 416 { 417 printf("cpu_biglock_wanted %p\n", dp->cpu_biglock_wanted); 418 printf("cpu_callout %p\n", dp->cpu_callout); 419 printf("cpu_unused1 %p\n", dp->cpu_unused1); 420 printf("cpu_unused2 %d\n", dp->cpu_unused2); 421 printf("&cpu_schedstate %p\n", &dp->cpu_schedstate); /* TBD */ 422 printf("&cpu_xcall %p\n", &dp->cpu_xcall); /* TBD */ 423 printf("cpu_xcall_pending %d\n", dp->cpu_xcall_pending); 424 printf("cpu_onproc %p\n", dp->cpu_onproc); 425 printf("cpu_idlelwp %p\n", dp->cpu_idlelwp); 426 printf("cpu_lockstat %p\n", dp->cpu_lockstat); 427 printf("cpu_index %d\n", dp->cpu_index); 428 printf("cpu_biglock_count %d\n", dp->cpu_biglock_count); 429 printf("cpu_spin_locks %d\n", dp->cpu_spin_locks); 430 printf("cpu_simple_locks %d\n", dp->cpu_simple_locks); 431 printf("cpu_spin_locks2 %d\n", dp->cpu_spin_locks2); 432 printf("cpu_lkdebug_recurse %d\n", dp->cpu_lkdebug_recurse); 433 printf("cpu_softints %d\n", dp->cpu_softints); 434 printf("cpu_nsyscall %"PRIu64"\n", dp->cpu_nsyscall); 435 printf("cpu_ntrap %"PRIu64"\n", dp->cpu_ntrap); 436 printf("cpu_nfault %"PRIu64"\n", dp->cpu_nfault); 437 printf("cpu_nintr %"PRIu64"\n", dp->cpu_nintr); 438 printf("cpu_nsoft %"PRIu64"\n", dp->cpu_nsoft); 439 printf("cpu_nswtch %"PRIu64"\n", dp->cpu_nswtch); 440 printf("cpu_uvm %p\n", dp->cpu_uvm); 441 printf("cpu_softcpu %p\n", dp->cpu_softcpu); 442 printf("&cpu_biodone %p\n", &dp->cpu_biodone); /* TBD */ 443 printf("&cpu_percpu %p\n", &dp->cpu_percpu); /* TBD */ 444 printf("cpu_selcluster %p\n", dp->cpu_selcluster); 445 printf("cpu_nch %p\n", dp->cpu_nch); 446 printf("&cpu_ld_locks %p\n", &dp->cpu_ld_locks); /* TBD */ 447 printf("&cpu_ld_lock %p\n", &dp->cpu_ld_lock); /* TBD */ 448 printf("cpu_cc_freq %#"PRIx64"\n", dp->cpu_cc_freq); 449 printf("cpu_cc_skew %#"PRIx64"\n", dp->cpu_cc_skew); 450 } 451 452 struct cpu_info * 453 rmixl_cpuinfo_print(u_int cpuindex) 454 { 455 struct cpu_info * const ci = cpu_lookup(cpuindex); 456 457 if (ci != NULL) { 458 rmixl_cpu_data_print(&ci->ci_data); 459 printf("ci_dev %p\n", ci->ci_dev); 460 printf("ci_cpuid %ld\n", ci->ci_cpuid); 461 printf("ci_cctr_freq %ld\n", ci->ci_cctr_freq); 462 printf("ci_cpu_freq %ld\n", ci->ci_cpu_freq); 463 printf("ci_cycles_per_hz %ld\n", ci->ci_cycles_per_hz); 464 printf("ci_divisor_delay %ld\n", ci->ci_divisor_delay); 465 printf("ci_divisor_recip %ld\n", ci->ci_divisor_recip); 466 printf("ci_curlwp %p\n", ci->ci_curlwp); 467 printf("ci_want_resched %d\n", ci->ci_want_resched); 468 printf("ci_mtx_count %d\n", ci->ci_mtx_count); 469 printf("ci_mtx_oldspl %d\n", ci->ci_mtx_oldspl); 470 printf("ci_idepth %d\n", ci->ci_idepth); 471 printf("ci_cpl %d\n", ci->ci_cpl); 472 printf("&ci_cpl %p\n", &ci->ci_cpl); /* XXX */ 473 printf("ci_next_cp0_clk_intr %#x\n", ci->ci_next_cp0_clk_intr); 474 for (int i=0; i < SOFTINT_COUNT; i++) 475 printf("ci_softlwps[%d] %p\n", i, ci->ci_softlwps[i]); 476 printf("ci_tlb_slot %d\n", ci->ci_tlb_slot); 477 printf("ci_pmap_asid_cur %d\n", ci->ci_pmap_asid_cur); 478 printf("ci_tlb_info %p\n", ci->ci_tlb_info); 479 printf("ci_pmap_seg0tab %p\n", ci->ci_pmap_seg0tab); 480 #ifdef _LP64 481 printf("ci_pmap_segtab %p\n", ci->ci_pmap_segtab); 482 #else 483 printf("ci_pmap_srcbase %#"PRIxVADDR"\n", ci->ci_pmap_srcbase); 484 printf("ci_pmap_dstbase %#"PRIxVADDR"\n", ci->ci_pmap_dstbase); 485 #endif 486 #ifdef MULTIPROCESSOR 487 printf("ci_flags %#lx\n", ci->ci_flags); 488 printf("ci_request_ipis %#"PRIx64"\n", ci->ci_request_ipis); 489 printf("ci_active_ipis %#"PRIx64"\n", ci->ci_active_ipis); 490 printf("ci_ksp_tlb_slot %d\n", ci->ci_ksp_tlb_slot); 491 #endif 492 } 493 494 return ci; 495 } 496 #endif /* DEBUG */ 497