1 /* $NetBSD: rmixl_cpu.c,v 1.17 2026/09/08 06:53:29 skrll 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 1.17 2026/09/08 06:53:29 skrll 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 <uvm/uvm_pglist.h> 54 #include <uvm/uvm_extern.h> 55 #include <mips/regnum.h> 56 #include <mips/pmap.h> 57 #include <mips/rmi/rmixlreg.h> 58 #include <mips/rmi/rmixlvar.h> 59 #include <mips/rmi/rmixl_cpucorevar.h> 60 #include <mips/rmi/rmixl_cpuvar.h> 61 #include <mips/rmi/rmixl_intr.h> 62 #include <mips/rmi/rmixl_fmnvar.h> 63 #ifdef DDB 64 #include <mips/db_machdep.h> 65 #endif 66 67 #include <mips/asm.h> /* XXX CALLFRAME_SIZ */ 68 69 static int cpu_rmixl_match(device_t, cfdata_t, void *); 70 static void cpu_rmixl_attach(device_t, device_t, void *); 71 static void cpu_rmixl_attach_primary(struct rmixl_cpu_softc * const); 72 #ifdef NOTYET 73 static int cpu_fmn_intr(void *, rmixl_fmn_rxmsg_t *); 74 #endif 75 76 #ifdef MULTIPROCESSOR 77 void cpu_rmixl_hatch(struct cpu_info *); 78 void cpu_rmixl_run(struct cpu_info *); 79 static int cpu_setup_trampoline_common(struct cpu_info *, struct rmixl_cpu_trampoline_args *); 80 static void cpu_setup_trampoline_callback(struct cpu_info *); 81 #endif /* MULTIPROCESSOR */ 82 83 #ifdef DEBUG 84 void rmixl_cpu_data_print(struct cpu_data *); 85 struct cpu_info * 86 rmixl_cpuinfo_print(u_int); 87 #endif /* DEBUG */ 88 89 CFATTACH_DECL_NEW(cpu_rmixl, sizeof(struct rmixl_cpu_softc), 90 cpu_rmixl_match, cpu_rmixl_attach, NULL, NULL); 91 92 #ifdef MULTIPROCESSOR 93 static struct rmixl_cpu_trampoline_args rmixl_cpu_trampoline_args; 94 #endif 95 96 /* 97 * cpu_rmixl_watchpoint_init - initialize COP0 watchpoint stuff 98 * 99 * clear IEU_DEFEATURE[DBE] to ensure T_WATCH on watchpoint exception 100 * set COP0 watchhi and watchlo 101 * 102 * disable all watchpoints 103 */ 104 static void 105 cpu_rmixl_watchpoint_init(void) 106 { 107 uint32_t r; 108 109 r = rmixl_mfcr(RMIXL_PCR_IEU_DEFEATURE); 110 r &= ~__BIT(7); /* DBE */ 111 rmixl_mtcr(RMIXL_PCR_IEU_DEFEATURE, r); 112 113 cpuwatch_clr_all(); 114 } 115 116 /* 117 * cpu_xls616_erratum 118 * 119 * on the XLS616, COUNT/COMPARE clock regs seem to interact between 120 * threads on a core 121 * 122 * the symptom of the error is retarded clock interrupts 123 * and very slow apparent system performance 124 * 125 * other XLS chips may have the same problem. 126 * we may need to add other PID checks. 127 */ 128 static inline bool 129 cpu_xls616_erratum(device_t parent, struct cpucore_attach_args *ca) 130 { 131 #if 0 132 if (mips_options.mips_cpu->cpu_pid == MIPS_XLS616) { 133 if (ca->ca_thread > 0) { 134 aprint_error_dev(parent, "XLS616 CLOCK ERRATUM: " 135 "deconfigure cpu%d\n", ca->ca_thread); 136 return true; 137 } 138 } 139 #endif 140 return false; 141 } 142 143 static bool 144 cpu_rmixl_erratum(device_t parent, struct cpucore_attach_args *ca) 145 { 146 return cpu_xls616_erratum(parent, ca); 147 } 148 149 static int 150 cpu_rmixl_match(device_t parent, cfdata_t cf, void *aux) 151 { 152 struct cpucore_attach_args *ca = aux; 153 int thread = cf->cf_loc[CPUCORECF_THREAD]; 154 155 if (!cpu_rmixl(mips_options.mips_cpu)) 156 return 0; 157 158 if (strncmp(ca->ca_name, cf->cf_name, strlen(cf->cf_name)) == 0 159 #ifndef MULTIPROCESSOR 160 && ca->ca_thread == 0 161 #endif 162 && (thread == CPUCORECF_THREAD_DEFAULT || thread == ca->ca_thread) 163 && (!cpu_rmixl_erratum(parent, ca))) 164 return 1; 165 166 return 0; 167 } 168 169 static void 170 cpu_rmixl_attach(device_t parent, device_t self, void *aux) 171 { 172 struct rmixl_cpu_softc * const sc = device_private(self); 173 struct cpu_info *ci = NULL; 174 static bool once = false; 175 extern void rmixl_spl_init_cpu(void); 176 177 if (once == false) { 178 /* first attach is the primary cpu */ 179 once = true; 180 ci = curcpu(); 181 sc->sc_dev = self; 182 sc->sc_ci = ci; 183 ci->ci_softc = (void *)sc; 184 185 rmixl_spl_init_cpu(); /* spl initialization for CPU#0 */ 186 cpu_rmixl_attach_primary(sc); 187 188 #ifdef MULTIPROCESSOR 189 mips_locoresw.lsw_cpu_init = cpu_rmixl_hatch; 190 mips_locoresw.lsw_cpu_run = cpu_rmixl_run; 191 } else { 192 struct cpucore_attach_args * const ca = aux; 193 struct cpucore_softc * const ccsc = device_private(parent); 194 rmixlfw_psb_type_t psb_type = rmixl_configuration.rc_psb_type; 195 cpuid_t cpuid; 196 197 KASSERT(ca->ca_core < 8); 198 KASSERT(ca->ca_thread < 4); 199 cpuid = (ca->ca_core << 2) | ca->ca_thread; 200 ci = cpu_info_alloc(ccsc->sc_tlbinfo, cpuid, 201 /* XXX */ 0, ca->ca_core, ca->ca_thread); 202 KASSERT(ci != NULL); 203 if (ccsc->sc_tlbinfo == NULL) 204 ccsc->sc_tlbinfo = cpu_tlb_info(ci); 205 sc->sc_dev = self; 206 sc->sc_ci = ci; 207 ci->ci_softc = (void *)sc; 208 209 switch (psb_type) { 210 case PSB_TYPE_RMI: 211 case PSB_TYPE_DELL: 212 cpu_setup_trampoline_callback(ci); 213 break; 214 default: 215 aprint_error(": psb type=%s cpu_wakeup unsupported\n", 216 rmixlfw_psb_type_name(psb_type)); 217 return; 218 } 219 220 for (size_t i=0; i < 10000; i++) { 221 if (!kcpuset_isset(cpus_hatched, cpu_index(ci))) 222 break; 223 DELAY(100); 224 } 225 if (!kcpuset_isset(cpus_hatched, cpu_index(ci))) { 226 aprint_error(": failed to hatch\n"); 227 return; 228 } 229 #endif /* MULTIPROCESSOR */ 230 } 231 232 /* 233 * do per-cpu interrupt initialization 234 */ 235 rmixl_intr_init_cpu(ci); 236 237 aprint_normal("\n"); 238 239 cpu_attach_common(self, ci); 240 } 241 242 /* 243 * attach the primary processor 244 */ 245 static void 246 cpu_rmixl_attach_primary(struct rmixl_cpu_softc * const sc) 247 { 248 struct cpu_info *ci = sc->sc_ci; 249 uint32_t ebase; 250 251 KASSERT(CPU_IS_PRIMARY(ci)); 252 253 /* 254 * obtain and set cpuid of the primary processor 255 */ 256 asm volatile("dmfc0 %0, $15, 1;" : "=r"(ebase)); 257 ci->ci_cpuid = ebase & __BITS(9,0); 258 259 cpu_rmixl_watchpoint_init(); 260 261 rmixl_fmn_init(); 262 263 rmixl_intr_init_clk(); 264 #ifdef MULTIPROCESSOR 265 rmixl_intr_init_ipi(); 266 #endif 267 268 #ifdef NOTYET 269 void *ih = rmixl_fmn_intr_establish(RMIXL_FMN_STID_CORE0, 270 cpu_fmn_intr, ci); 271 if (ih == NULL) 272 panic("%s: rmixl_fmn_intr_establish failed", 273 __func__); 274 sc->sc_ih_fmn = ih; 275 #endif 276 } 277 278 #ifdef NOTYET 279 static int 280 cpu_fmn_intr(void *arg, rmixl_fmn_rxmsg_t *rxmsg) 281 { 282 if (CPU_IS_PRIMARY(curcpu())) { 283 printf("%s: cpu%ld: rxsid=%#x, code=%d, size=%d\n", 284 __func__, cpu_number(), 285 rxmsg->rxsid, rxmsg->code, rxmsg->size); 286 for (int i=0; i < rxmsg->size; i++) 287 printf("\t%#"PRIx64"\n", rxmsg->msg.data[i]); 288 } 289 290 return 1; 291 } 292 #endif 293 294 #ifdef MULTIPROCESSOR 295 /* 296 * cpu_rmixl_run 297 * 298 * - chip-specific post-running code called from cpu_hatch via lsw_cpu_run 299 */ 300 void 301 cpu_rmixl_run(struct cpu_info *ci) 302 { 303 struct rmixl_cpu_softc * const sc = (void *)ci->ci_softc; 304 cpucore_rmixl_run(device_parent(sc->sc_dev)); 305 } 306 307 /* 308 * cpu_rmixl_hatch 309 * 310 * - chip-specific hatch code called from cpu_hatch via lsw_cpu_init 311 */ 312 void 313 cpu_rmixl_hatch(struct cpu_info *ci) 314 { 315 struct rmixl_cpu_softc * const sc = (void *)ci->ci_softc; 316 extern void rmixl_spl_init_cpu(void); 317 318 rmixl_spl_init_cpu(); /* spl initialization for this CPU */ 319 320 (void)splhigh(); 321 322 #ifdef DIAGNOSTIC 323 uint32_t ebase = mipsNN_cp0_ebase_read(); 324 KASSERT((ebase & MIPS_EBASE_CPUNUM) == ci->ci_cpuid); 325 KASSERT(curcpu() == ci); 326 #endif 327 328 cpucore_rmixl_hatch(device_parent(sc->sc_dev)); 329 330 cpu_rmixl_watchpoint_init(); 331 } 332 333 static int 334 cpu_setup_trampoline_common(struct cpu_info *ci, struct rmixl_cpu_trampoline_args *ta) 335 { 336 struct lwp *l = ci->ci_data.cpu_idlelwp; 337 uintptr_t stacktop; 338 339 #ifdef DIAGNOSTIC 340 /* Ensure our current stack can be used by the firmware */ 341 uint64_t sp; 342 __asm__ volatile("move %0, $sp\n" : "=r"(sp)); 343 #ifdef _LP64 344 /* can be made into a KSEG0 addr */ 345 KASSERT(MIPS_XKPHYS_P(sp)); 346 KASSERT((MIPS_XKPHYS_TO_PHYS(sp) >> 32) == 0); 347 #else 348 /* is a KSEG0 addr */ 349 KASSERT(MIPS_KSEG0_P(sp)); 350 #endif /* _LP64 */ 351 #endif /* DIAGNOSTIC */ 352 353 #ifndef _LP64 354 /* 355 * Ensure 'ci' is a KSEG0 address for trampoline args 356 * to avoid TLB fault in cpu_trampoline() when loading ci_idlelwp 357 */ 358 KASSERT(MIPS_KSEG0_P(ci)); 359 #endif 360 361 /* 362 * Ensure 'ta' is a KSEG0 address for trampoline args 363 * to avoid TLB fault in trampoline when loading args. 364 * 365 * Note: 366 * RMI firmware only passes the lower 32-bit half of 'ta' 367 * to rmixl_cpu_trampoline (the upper half is clear) 368 * so rmixl_cpu_trampoline must reconstruct the missing upper half 369 * rmixl_cpu_trampoline "knows" 'ta' is a KSEG0 address 370 * and sign-extends to make an LP64 KSEG0 address. 371 */ 372 KASSERT(MIPS_KSEG0_P(ta)); 373 374 /* 375 * marshal args for rmixl_cpu_trampoline; 376 * note for non-LP64 kernel, use of intptr_t 377 * forces sign extension of 32 bit pointers 378 */ 379 stacktop = (uintptr_t)l->l_md.md_utf - CALLFRAME_SIZ; 380 ta->ta_sp = (uint64_t)(intptr_t)stacktop; 381 ta->ta_lwp = (uint64_t)(intptr_t)l; 382 ta->ta_cpuinfo = (uint64_t)(intptr_t)ci; 383 384 return 0; 385 } 386 387 static void 388 cpu_setup_trampoline_callback(struct cpu_info *ci) 389 { 390 void (*wakeup_cpu)(void *, void *, unsigned int); 391 struct rmixl_cpu_trampoline_args *ta = &rmixl_cpu_trampoline_args; 392 extern void rmixl_cpu_trampoline(void *); 393 extern void rmixlfw_wakeup_cpu(void *, void *, u_int64_t, void *); 394 395 cpu_setup_trampoline_common(ci, ta); 396 397 #if _LP64 398 wakeup_cpu = (void *)rmixl_configuration.rc_psb_info.wakeup; 399 #else 400 wakeup_cpu = (void *)(intptr_t) 401 (rmixl_configuration.rc_psb_info.wakeup & 0xffffffff); 402 #endif 403 404 rmixlfw_wakeup_cpu(rmixl_cpu_trampoline, (void *)ta, 405 (uint64_t)1 << ci->ci_cpuid, wakeup_cpu); 406 } 407 #endif /* MULTIPROCESSOR */ 408 409 410 #ifdef DEBUG 411 void 412 rmixl_cpu_data_print(struct cpu_data *dp) 413 { 414 printf("cpu_biglock_wanted %p\n", dp->cpu_biglock_wanted); 415 printf("cpu_callout %p\n", dp->cpu_callout); 416 printf("&cpu_schedstate %p\n", &dp->cpu_schedstate); /* TBD */ 417 printf("&cpu_xcall %p\n", &dp->cpu_xcall); /* TBD */ 418 printf("cpu_xcall_pending %d\n", dp->cpu_xcall_pending); 419 printf("cpu_idlelwp %p\n", dp->cpu_idlelwp); 420 printf("cpu_lockstat %p\n", dp->cpu_lockstat); 421 printf("cpu_index %d\n", dp->cpu_index); 422 printf("cpu_biglock_count %d\n", dp->cpu_biglock_count); 423 printf("cpu_psz_read_depth %d\n", dp->cpu_psz_read_depth); 424 printf("cpu_lkdebug_recurse %d\n", dp->cpu_lkdebug_recurse); 425 printf("cpu_softints %d\n", dp->cpu_softints); 426 printf("cpu_nsyscall %"PRIu64"\n", dp->cpu_nsyscall); 427 printf("cpu_ntrap %"PRIu64"\n", dp->cpu_ntrap); 428 printf("cpu_nfault %"PRIu64"\n", dp->cpu_nfault); 429 printf("cpu_nintr %"PRIu64"\n", dp->cpu_nintr); 430 printf("cpu_nsoft %"PRIu64"\n", dp->cpu_nsoft); 431 printf("cpu_nswtch %"PRIu64"\n", dp->cpu_nswtch); 432 printf("cpu_uvm %p\n", dp->cpu_uvm); 433 printf("cpu_softcpu %p\n", dp->cpu_softcpu); 434 printf("&cpu_biodone %p\n", &dp->cpu_biodone); /* TBD */ 435 printf("&cpu_percpu %p\n", &dp->cpu_percpu); /* TBD */ 436 printf("cpu_selcluster %p\n", dp->cpu_selcluster); 437 printf("cpu_nch %p\n", dp->cpu_nch); 438 printf("&cpu_ld_locks %p\n", &dp->cpu_ld_locks); /* TBD */ 439 printf("&cpu_ld_lock %p\n", &dp->cpu_ld_lock); /* TBD */ 440 printf("cpu_cc_freq %#"PRIx64"\n", dp->cpu_cc_freq); 441 printf("cpu_cc_skew %#"PRIx64"\n", dp->cpu_cc_skew); 442 } 443 444 struct cpu_info * 445 rmixl_cpuinfo_print(u_int cpuindex) 446 { 447 struct cpu_info * const ci = cpu_lookup(cpuindex); 448 449 if (ci != NULL) { 450 rmixl_cpu_data_print(&ci->ci_data); 451 printf("ci_dev %p\n", ci->ci_dev); 452 printf("ci_cpuid %ld\n", ci->ci_cpuid); 453 printf("ci_cctr_freq %ld\n", ci->ci_cctr_freq); 454 printf("ci_cpu_freq %ld\n", ci->ci_cpu_freq); 455 printf("ci_cycles_per_hz %ld\n", ci->ci_cycles_per_hz); 456 printf("ci_divisor_delay %ld\n", ci->ci_divisor_delay); 457 printf("ci_divisor_recip %ld\n", ci->ci_divisor_recip); 458 printf("ci_curlwp %p\n", ci->ci_curlwp); 459 printf("ci_onproc %p\n", ci->ci_onproc); 460 printf("ci_want_resched %d\n", ci->ci_want_resched); 461 printf("ci_mtx_count %d\n", ci->ci_mtx_count); 462 printf("ci_mtx_oldspl %d\n", ci->ci_mtx_oldspl); 463 printf("ci_idepth %d\n", ci->ci_idepth); 464 printf("ci_cpl %d\n", ci->ci_cpl); 465 printf("&ci_cpl %p\n", &ci->ci_cpl); /* XXX */ 466 printf("ci_next_cp0_clk_intr %#x\n", ci->ci_next_cp0_clk_intr); 467 for (int i=0; i < SOFTINT_COUNT; i++) 468 printf("ci_softlwps[%d] %p\n", i, ci->ci_softlwps[i]); 469 printf("ci_tlb_slot %d\n", ci->ci_tlb_slot); 470 printf("ci_pmap_asid_cur %d\n", ci->ci_pmap_asid_cur); 471 printf("ci_tlb_info %p\n", ci->ci_tlb_info); 472 printf("ci_pmap_kern_segtab %p\n", ci->ci_pmap_kern_segtab); 473 printf("ci_pmap_user_segtab %p\n", ci->ci_pmap_user_segtab); 474 #ifdef _LP64 475 printf("ci_pmap_kern_seg0tab %p\n", ci->ci_pmap_kern_seg0tab); 476 printf("ci_pmap_user_seg0tab %p\n", ci->ci_pmap_user_seg0tab); 477 #else 478 printf("ci_pmap_srcbase %#"PRIxVADDR"\n", ci->ci_pmap_srcbase); 479 printf("ci_pmap_dstbase %#"PRIxVADDR"\n", ci->ci_pmap_dstbase); 480 #endif 481 #ifdef MULTIPROCESSOR 482 printf("ci_flags %#lx\n", ci->ci_flags); 483 printf("ci_request_ipis %#"PRIx64"\n", ci->ci_request_ipis); 484 printf("ci_active_ipis %#"PRIx64"\n", ci->ci_active_ipis); 485 printf("ci_ksp_tlb_slot %d\n", ci->ci_ksp_tlb_slot); 486 #endif 487 } 488 489 return ci; 490 } 491 #endif /* DEBUG */ 492
Indexes created Sun Oct 25 00:26:45 UTC 2026