/* $NetBSD: cpu_acpi.c,v 1.14 2022/05/16 09:42:32 jmcneill Exp $ */ /*- * Copyright (c) 2018 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jared McNeill . * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include "tprof.h" #include "opt_multiprocessor.h" #include __KERNEL_RCSID(0, "$NetBSD: cpu_acpi.c,v 1.14 2022/05/16 09:42:32 jmcneill Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if NTPROF > 0 #include #endif static int cpu_acpi_match(device_t, cfdata_t, void *); static void cpu_acpi_attach(device_t, device_t, void *); #if NTPROF > 0 static void cpu_acpi_tprof_init(device_t); #endif CFATTACH_DECL_NEW(cpu_acpi, 0, cpu_acpi_match, cpu_acpi_attach, NULL, NULL); #ifdef MULTIPROCESSOR static register_t cpu_acpi_mpstart_pa(void) { return (register_t)KERN_VTOPHYS((vaddr_t)cpu_mpstart); } #endif /* MULTIPROCESSOR */ static int cpu_acpi_match(device_t parent, cfdata_t cf, void *aux) { ACPI_SUBTABLE_HEADER *hdrp = aux; ACPI_MADT_GENERIC_INTERRUPT *gicc; if (hdrp->Type != ACPI_MADT_TYPE_GENERIC_INTERRUPT) return 0; gicc = (ACPI_MADT_GENERIC_INTERRUPT *)hdrp; return (gicc->Flags & ACPI_MADT_ENABLED) != 0; } static void cpu_acpi_attach(device_t parent, device_t self, void *aux) { prop_dictionary_t dict = device_properties(self); ACPI_MADT_GENERIC_INTERRUPT *gicc = aux; const uint64_t mpidr = gicc->ArmMpidr; const int unit = device_unit(self); struct cpu_info *ci = &cpu_info_store[unit]; #ifdef MULTIPROCESSOR if (cpu_mpidr_aff_read() != mpidr && (boothowto & RB_MD1) == 0) { const u_int cpuindex = device_unit(self); int error; cpu_mpidr[cpuindex] = mpidr; cpu_dcache_wb_range((vaddr_t)&cpu_mpidr[cpuindex], sizeof(cpu_mpidr[cpuindex])); /* XXX support spin table */ error = psci_cpu_on(mpidr, cpu_acpi_mpstart_pa(), 0); if (error != PSCI_SUCCESS) { aprint_error_dev(self, "failed to start CPU\n"); return; } sev(); for (u_int i = 0x10000000; i > 0; i--) { if (cpu_hatched_p(cpuindex)) break; } } #endif /* MULTIPROCESSOR */ /* Assume that less efficient processors are faster. */ prop_dictionary_set_uint32(dict, "capacity_dmips_mhz", gicc->EfficiencyClass); /* Store the ACPI Processor UID in cpu_info */ ci->ci_acpiid = gicc->Uid; /* Attach the CPU */ cpu_attach(self, mpidr); #if NTPROF > 0 if (cpu_mpidr_aff_read() == mpidr && armv8_pmu_detect()) config_interrupts(self, cpu_acpi_tprof_init); #endif } #if NTPROF > 0 static struct cpu_info * cpu_acpi_find_processor(UINT32 uid) { CPU_INFO_ITERATOR cii; struct cpu_info *ci; for (CPU_INFO_FOREACH(cii, ci)) { if (ci->ci_acpiid == uid) return ci; } return NULL; } static ACPI_STATUS cpu_acpi_tprof_intr_establish(ACPI_SUBTABLE_HEADER *hdrp, void *aux) { device_t dev = aux; ACPI_MADT_GENERIC_INTERRUPT *gicc; struct cpu_info *ci; char xname[16]; kcpuset_t *set; int error; void *ih; if (hdrp->Type != ACPI_MADT_TYPE_GENERIC_INTERRUPT) return AE_OK; gicc = (ACPI_MADT_GENERIC_INTERRUPT *)hdrp; if ((gicc->Flags & ACPI_MADT_ENABLED) == 0) return AE_OK; const bool cpu_primary_p = cpu_info_store[0].ci_cpuid == gicc->ArmMpidr; const bool intr_ppi_p = gicc->PerformanceInterrupt < 32; const int type = (gicc->Flags & ACPI_MADT_PERFORMANCE_IRQ_MODE) ? IST_EDGE : IST_LEVEL; if (intr_ppi_p && !cpu_primary_p) return AE_OK; ci = cpu_acpi_find_processor(gicc->Uid); if (ci == NULL) { aprint_error_dev(dev, "couldn't find processor %#x\n", gicc->Uid); return AE_OK; } if (intr_ppi_p) { strlcpy(xname, "pmu", sizeof(xname)); } else { snprintf(xname, sizeof(xname), "pmu %s", cpu_name(ci)); } ih = intr_establish_xname(gicc->PerformanceInterrupt, IPL_HIGH, type | IST_MPSAFE, armv8_pmu_intr, NULL, xname); if (ih == NULL) { aprint_error_dev(dev, "couldn't establish %s interrupt\n", xname); return AE_OK; } if (!intr_ppi_p) { kcpuset_create(&set, true); kcpuset_set(set, cpu_index(ci)); error = interrupt_distribute(ih, set, NULL); kcpuset_destroy(set); if (error) { aprint_error_dev(dev, "failed to distribute %s interrupt: %d\n", xname, error); return AE_OK; } } aprint_normal("%s: PMU interrupting on irq %d\n", cpu_name(ci), gicc->PerformanceInterrupt); return AE_OK; } static void cpu_acpi_tprof_init(device_t self) { int err = armv8_pmu_init(); if (err) { aprint_error_dev(self, "failed to initialize PMU event counter\n"); return; } if (acpi_madt_map() != AE_OK) { aprint_error_dev(self, "failed to map MADT, performance counters not available\n"); return; } acpi_madt_walk(cpu_acpi_tprof_intr_establish, self); acpi_madt_unmap(); } #endif