| // Copyright 2017 The Fuchsia Authors |
| // |
| // Use of this source code is governed by a MIT-style |
| // license that can be found in the LICENSE file or at |
| // https://opensource.org/licenses/MIT |
| #include "arch/arm64/feature.h" |
| |
| #include <bits.h> |
| #include <ctype.h> |
| #include <inttypes.h> |
| #include <lib/arch/arm64/feature.h> |
| #include <lib/arch/intrin.h> |
| |
| #include <arch/arm64.h> |
| #include <fbl/algorithm.h> |
| #include <kernel/cpu.h> |
| #include <ktl/iterator.h> |
| |
| #include <ktl/enforce.h> |
| |
| // saved instruction set feature bitmap |
| uint32_t arm64_isa_features; |
| |
| // Whether FEAT_PMUv3 is implemented. |
| bool feat_pmuv3_enabled; |
| |
| static arm64_cache_info cache_info[SMP_MAX_CPUS]; |
| |
| // MMU features |
| struct arm64_mmu_features arm64_mmu_features; |
| |
| // cache size parameters cpus, default to a reasonable minimum |
| uint32_t arm64_zva_size = 32; |
| uint32_t arm64_icache_size = 32; |
| uint32_t arm64_dcache_size = 32; |
| |
| void arm64_get_cache_info(arm64_cache_info* info) { |
| *info = {}; |
| |
| uint64_t clidr = __arm_rsr64("clidr_el1"); |
| info->inner_boundary = static_cast<uint8_t>(BITS_SHIFT(clidr, 32, 30)); |
| info->lou_u = static_cast<uint8_t>(BITS_SHIFT(clidr, 29, 27)); |
| info->loc = static_cast<uint8_t>(BITS_SHIFT(clidr, 26, 24)); |
| info->lou_is = static_cast<uint8_t>(BITS_SHIFT(clidr, 23, 21)); |
| |
| uint64_t ctr = __arm_rsr64("ctr_el0"); |
| info->imin_line = static_cast<uint8_t>(BITS(ctr, 3, 0)); |
| info->dmin_line = static_cast<uint8_t>(BITS_SHIFT(ctr, 19, 16)); |
| info->l1_instruction_cache_policy = static_cast<uint8_t>(BITS_SHIFT(ctr, 15, 14)); |
| info->cache_writeback_granule = static_cast<uint8_t>(BITS_SHIFT(ctr, 27, 24)); |
| info->idc = BIT(ctr, 28); |
| info->dic = BIT(ctr, 29); |
| |
| auto process_ccsid = [info](size_t level, uint8_t ctype) { |
| const bool instruction = ctype & 0x1; |
| |
| __arm_wsr64("csselr_el1", (level << 1) | (instruction ? 1 : 0)); // Select cache level |
| __isb(ARM_MB_SY); |
| |
| arm64_cache_desc* desc = |
| instruction ? &info->level_inst_type[level] : &info->level_data_type[level]; |
| desc->ctype = ctype; |
| |
| const uint64_t ccsid = __arm_rsr64("ccsidr_el1"); |
| if (arm64_mmu_features.ccsidx) { |
| // Parse the newer extended ccsid format |
| desc->num_sets = static_cast<uint32_t>(BITS_SHIFT(ccsid, 55, 32) + 1); |
| desc->associativity = static_cast<uint32_t>(BITS_SHIFT(ccsid, 23, 3) + 1); |
| desc->line_size = 1u << (BITS(ccsid, 2, 0) + 4); |
| } else { |
| desc->num_sets = static_cast<uint32_t>(BITS_SHIFT(ccsid, 27, 13) + 1); |
| desc->associativity = static_cast<uint32_t>(BITS_SHIFT(ccsid, 12, 3) + 1); |
| desc->line_size = 1u << (BITS(ccsid, 2, 0) + 4); |
| } |
| }; |
| |
| for (size_t i = 0; i < 7; i++) { |
| uint8_t ctype = (clidr >> (3 * i)) & 0x07; |
| if (ctype == 0) { |
| // No more valid ctypes after this |
| break; |
| } |
| |
| if (ctype == 4) { // Unified |
| process_ccsid(i, ctype); |
| } else { |
| if (ctype & 0x2) { // Data cache |
| process_ccsid(i, ctype & 0x2); |
| } |
| if (ctype & 0x1) { // Instruction cache |
| process_ccsid(i, ctype & 0x1); |
| } |
| } |
| } |
| } |
| |
| void arm64_dump_cache_info(cpu_num_t cpu) { |
| arm64_cache_info* info = &(cache_info[cpu]); |
| printf("==== ARM64 CACHE INFO CORE %u ====\n", cpu); |
| printf("Inner Boundary = L%u\n", info->inner_boundary); |
| printf("Level of Unification Uniprocessor = L%u\n", info->lou_u); |
| printf("Level of Coherence = L%u\n", info->loc); |
| printf("Level of Unification Inner Shareable = L%u\n", info->lou_is); |
| printf("Instruction/Data cache minimum line = %u/%u\n", (1U << info->imin_line) * 4, |
| (1U << info->dmin_line) * 4); |
| printf("Cache Writeback Granule = %u\n", (1U << info->cache_writeback_granule) * 4); |
| if (arm64_mmu_features.ccsidx) { |
| dprintf(INFO, "Extended CCSIDR format\n"); |
| } |
| const char* icp = ""; |
| switch (info->l1_instruction_cache_policy) { |
| case 0: |
| icp = "VPIPT"; |
| break; |
| case 1: |
| icp = "AIVIVT"; |
| break; |
| case 2: |
| icp = "VIPT"; |
| break; |
| case 3: |
| icp = "PIPT"; |
| break; |
| } |
| printf("L1 Instruction cache policy = %s, ", icp); |
| printf("IDC = %i, DIC = %i\n", info->idc, info->dic); |
| for (int i = 0; i < 7; i++) { |
| if ((info->level_data_type[i].ctype == 0) && (info->level_inst_type[i].ctype == 0)) { |
| break; // not implemented |
| } |
| printf("L%d Details:", i + 1); |
| if (info->level_data_type[i].ctype == 4) { |
| printf("\tUnified Cache, sets=%u, associativity=%u, line size=%u bytes\n", |
| info->level_data_type[i].num_sets, info->level_data_type[i].associativity, |
| info->level_data_type[i].line_size); |
| } else { |
| if (info->level_data_type[i].ctype & 0x02) { |
| printf("\tData Cache, sets=%u, associativity=%u, line size=%u bytes\n", |
| info->level_data_type[i].num_sets, info->level_data_type[i].associativity, |
| info->level_data_type[i].line_size); |
| } |
| if (info->level_inst_type[i].ctype & 0x01) { |
| if (info->level_data_type[i].ctype & 0x02) { |
| printf("\t"); |
| } |
| printf("\tInstruction Cache, sets=%u, associativity=%u, line size=%u bytes\n", |
| info->level_inst_type[i].num_sets, info->level_inst_type[i].associativity, |
| info->level_inst_type[i].line_size); |
| } |
| } |
| } |
| } |
| |
| enum arm64_microarch midr_to_microarch(uint64_t midr) { |
| uint64_t implementer = BITS_SHIFT(midr, 31, 24); |
| uint64_t partnum = BITS_SHIFT(midr, 15, 4); |
| |
| if (implementer == 'A') { |
| // ARM cores |
| switch (partnum) { |
| case 0xd01: |
| return ARM_CORTEX_A32; |
| case 0xd03: |
| return ARM_CORTEX_A53; |
| case 0xd04: |
| return ARM_CORTEX_A35; |
| case 0xd05: |
| return ARM_CORTEX_A55; |
| case 0xd06: |
| return ARM_CORTEX_A65; |
| case 0xd07: |
| return ARM_CORTEX_A57; |
| case 0xd08: |
| return ARM_CORTEX_A72; |
| case 0xd09: |
| return ARM_CORTEX_A73; |
| case 0xd0a: |
| return ARM_CORTEX_A75; |
| case 0xd0b: |
| return ARM_CORTEX_A76; |
| case 0xd0c: |
| return ARM_NEOVERSE_N1; |
| case 0xd0d: |
| return ARM_CORTEX_A77; |
| case 0xd0e: |
| return ARM_CORTEX_A76AE; |
| case 0xd40: |
| return ARM_NEOVERSE_V1; |
| case 0xd41: |
| return ARM_CORTEX_A78; |
| case 0xd42: |
| return ARM_CORTEX_A78AE; |
| case 0xd43: |
| return ARM_CORTEX_A65AE; |
| case 0xd44: |
| return ARM_CORTEX_X1; |
| case 0xd46: |
| return ARM_CORTEX_A510; |
| case 0xd47: |
| return ARM_CORTEX_A710; |
| case 0xd48: |
| return ARM_CORTEX_X2; |
| case 0xd49: |
| return ARM_NEOVERSE_N2; |
| case 0xd4a: |
| return ARM_NEOVERSE_E1; |
| case 0xd4b: |
| return ARM_CORTEX_A78C; |
| case 0xd4c: |
| return ARM_CORTEX_X1C; |
| case 0xd4d: |
| return ARM_CORTEX_A715; |
| case 0xd4e: |
| return ARM_CORTEX_X3; |
| case 0xd80: |
| return ARM_CORTEX_A520; |
| case 0xd81: |
| return ARM_CORTEX_A720; |
| case 0xd82: |
| return ARM_CORTEX_X4; |
| case 0xd85: |
| return ARM_CORTEX_X925; |
| case 0xd87: |
| return ARM_CORTEX_A725; |
| default: |
| return UNKNOWN; |
| } |
| } else if (implementer == 'C') { |
| // Cavium |
| switch (partnum) { |
| case 0xa1: |
| return CAVIUM_CN88XX; |
| case 0xaf: |
| return CAVIUM_CN99XX; |
| default: |
| return UNKNOWN; |
| } |
| } else if (implementer == 0x61) { |
| // Apple |
| // For the moment, qemu via HVF does not seem to return |
| // a meaningful part number. |
| return APPLE_UNKNOWN; |
| |
| } else if (implementer == 0) { |
| // software implementation |
| switch (partnum) { |
| case 0x51: |
| return QEMU_TCG; |
| default: |
| return UNKNOWN; |
| } |
| } else { |
| return UNKNOWN; |
| } |
| } |
| |
| static void midr_to_core_string(uint64_t midr, char* str, size_t len) { |
| auto microarch = midr_to_microarch(midr); |
| uint64_t implementer = BITS_SHIFT(midr, 31, 24); |
| uint64_t variant = BITS_SHIFT(midr, 23, 20); |
| [[maybe_unused]] uint64_t architecture = BITS_SHIFT(midr, 19, 16); |
| uint64_t partnum = BITS_SHIFT(midr, 15, 4); |
| uint64_t revision = BITS_SHIFT(midr, 3, 0); |
| |
| const char* partnum_str = "unknown"; |
| switch (microarch) { |
| case ARM_CORTEX_A32: |
| partnum_str = "ARM Cortex-A32"; |
| break; |
| case ARM_CORTEX_A35: |
| partnum_str = "ARM Cortex-A35"; |
| break; |
| case ARM_CORTEX_A53: |
| partnum_str = "ARM Cortex-A53"; |
| break; |
| case ARM_CORTEX_A55: |
| partnum_str = "ARM Cortex-A55"; |
| break; |
| case ARM_CORTEX_A57: |
| partnum_str = "ARM Cortex-A57"; |
| break; |
| case ARM_CORTEX_A65: |
| partnum_str = "ARM Cortex-A65"; |
| break; |
| case ARM_CORTEX_A65AE: |
| partnum_str = "ARM Cortex-A65AE"; |
| break; |
| case ARM_CORTEX_A72: |
| partnum_str = "ARM Cortex-A72"; |
| break; |
| case ARM_CORTEX_A73: |
| partnum_str = "ARM Cortex-A73"; |
| break; |
| case ARM_CORTEX_A75: |
| partnum_str = "ARM Cortex-A75"; |
| break; |
| case ARM_CORTEX_A76: |
| partnum_str = "ARM Cortex-A76"; |
| break; |
| case ARM_CORTEX_A76AE: |
| partnum_str = "ARM Cortex-A76AE"; |
| break; |
| case ARM_CORTEX_A77: |
| partnum_str = "ARM Cortex-A77"; |
| break; |
| case ARM_CORTEX_A78: |
| partnum_str = "ARM Cortex-A78"; |
| break; |
| case ARM_CORTEX_A78AE: |
| partnum_str = "ARM Cortex-A78AE"; |
| break; |
| case ARM_CORTEX_A78C: |
| partnum_str = "ARM Cortex-A78C"; |
| break; |
| case ARM_CORTEX_A510: |
| partnum_str = "ARM Cortex-A510"; |
| break; |
| case ARM_CORTEX_A520: |
| partnum_str = "ARM Cortex-A520"; |
| break; |
| case ARM_CORTEX_A710: |
| partnum_str = "ARM Cortex-A710"; |
| break; |
| case ARM_CORTEX_A715: |
| partnum_str = "ARM Cortex-A715"; |
| break; |
| case ARM_CORTEX_A720: |
| partnum_str = "ARM Cortex-A720"; |
| break; |
| case ARM_CORTEX_A725: |
| partnum_str = "ARM Cortex-A725"; |
| break; |
| case ARM_CORTEX_X1: |
| partnum_str = "ARM Cortex-X1"; |
| break; |
| case ARM_CORTEX_X1C: |
| partnum_str = "ARM Cortex-X1C"; |
| break; |
| case ARM_CORTEX_X2: |
| partnum_str = "ARM Cortex-X2"; |
| break; |
| case ARM_CORTEX_X3: |
| partnum_str = "ARM Cortex-X3"; |
| break; |
| case ARM_CORTEX_X4: |
| partnum_str = "ARM Cortex-X4"; |
| break; |
| case ARM_CORTEX_X925: |
| partnum_str = "ARM Cortex-X925"; |
| break; |
| case ARM_NEOVERSE_E1: |
| partnum_str = "ARM Neoverse E1"; |
| break; |
| case ARM_NEOVERSE_N1: |
| partnum_str = "ARM Neoverse N1"; |
| break; |
| case ARM_NEOVERSE_N2: |
| partnum_str = "ARM Neoverse N2"; |
| break; |
| case ARM_NEOVERSE_V1: |
| partnum_str = "ARM Neoverse V1"; |
| break; |
| case CAVIUM_CN88XX: |
| partnum_str = "Cavium CN88XX"; |
| break; |
| case CAVIUM_CN99XX: |
| partnum_str = "Cavium CN99XX"; |
| break; |
| case APPLE_UNKNOWN: |
| partnum_str = "Unknown Apple Silicon"; |
| break; |
| case QEMU_TCG: |
| partnum_str = "QEMU TCG"; |
| break; |
| case UNKNOWN: { |
| const char i = isprint(static_cast<int>(implementer)) ? static_cast<char>(implementer) : '0'; |
| snprintf(str, len, "Unknown implementer %c partnum %#lx r%lup%lu", i, partnum, variant, |
| revision); |
| return; |
| } |
| } |
| |
| snprintf(str, len, "%s r%lup%lu", partnum_str, variant, revision); |
| } |
| |
| static void print_cpu_info() { |
| uint64_t midr = __arm_rsr64("midr_el1"); |
| char cpu_name[128]; |
| midr_to_core_string(midr, cpu_name, sizeof(cpu_name)); |
| |
| uint64_t mpidr = __arm_rsr64("mpidr_el1"); |
| |
| dprintf(INFO, "ARM cpu %u: midr %#lx '%s' mpidr %#" PRIx64 " aff %u:%u:%u:%u\n", |
| arch_curr_cpu_num(), midr, cpu_name, mpidr, |
| (uint32_t)((mpidr & MPIDR_AFF3_MASK) >> MPIDR_AFF3_SHIFT), |
| (uint32_t)((mpidr & MPIDR_AFF2_MASK) >> MPIDR_AFF2_SHIFT), |
| (uint32_t)((mpidr & MPIDR_AFF1_MASK) >> MPIDR_AFF1_SHIFT), |
| (uint32_t)((mpidr & MPIDR_AFF0_MASK) >> MPIDR_AFF0_SHIFT)); |
| } |
| |
| bool arm64_feature_current_is_first_in_cluster() { |
| const uint64_t mpidr = __arm_rsr64("mpidr_el1"); |
| |
| // Note: this test is not strictly correct, since the affinity fields really do not encode the |
| // cluster layout of the cores anymore. Since about cortex-a75 and somewhere in the mid armv8 |
| // spec, the layout of these fields has been somewhat retconned to mean whatever the vendor wants, |
| // and true cluster layout comes from external sources (such as device tree). However, the MT |
| // bit says whether or not AFF0 is purely listing threads within a cpu, and all new cores have |
| // it set all the time, even if they're not SMT capable. |
| if (mpidr & MPIDR_MT) { |
| return ((mpidr & MPIDR_AFF1_MASK) >> MPIDR_AFF1_SHIFT) == 0; |
| } |
| return ((mpidr & MPIDR_AFF0_MASK) >> MPIDR_AFF0_SHIFT) == 0; |
| } |
| |
| // call on every cpu to save features |
| void arm64_feature_init() { |
| // set up some global constants based on the boot cpu |
| cpu_num_t cpu = arch_curr_cpu_num(); |
| if (cpu == 0) { |
| // read the block size of DC ZVA |
| uint64_t dczid = __arm_rsr64("dczid_el0"); |
| uint32_t arm64_zva_shift = 0; |
| if (BIT(dczid, 4) == 0) { |
| arm64_zva_shift = (uint32_t)(__arm_rsr64("dczid_el0") & 0xf) + 2; |
| } |
| ASSERT(arm64_zva_shift != 0); // for now, fail if DC ZVA is unavailable |
| arm64_zva_size = (1u << arm64_zva_shift); |
| |
| // read the dcache and icache line size |
| uint64_t ctr = __arm_rsr64("ctr_el0"); |
| uint32_t arm64_dcache_shift = (uint32_t)BITS_SHIFT(ctr, 19, 16) + 2; |
| arm64_dcache_size = (1u << arm64_dcache_shift); |
| uint32_t arm64_icache_shift = (uint32_t)BITS(ctr, 3, 0) + 2; |
| arm64_icache_size = (1u << arm64_icache_shift); |
| |
| // parse the ISA feature bits |
| arm64_isa_features |= ZX_HAS_CPU_FEATURES; |
| |
| auto isar0 = arch::ArmIdAa64IsaR0El1::Read(); |
| |
| // By D13.1.3 "Principles of the ID scheme for fields in ID registers", it |
| // is safe to assume that values assigned in the future will describe |
| // supersets of the existing options. |
| switch (isar0.aes()) { |
| default: |
| case arch::ArmIdAa64IsaR0El1::Aes::kPmull: |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_PMULL; |
| [[fallthrough]]; |
| case arch::ArmIdAa64IsaR0El1::Aes::kAes: |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_AES; |
| break; |
| case arch::ArmIdAa64IsaR0El1::Aes::kNone: |
| break; |
| } |
| |
| if (isar0.sha1() != arch::ArmIdAa64IsaR0El1::Sha1::kNone) { |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_SHA1; |
| } |
| switch (isar0.sha2()) { |
| default: |
| case arch::ArmIdAa64IsaR0El1::Sha2::kSha512: |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_SHA512; |
| [[fallthrough]]; |
| case arch::ArmIdAa64IsaR0El1::Sha2::kSha256: |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_SHA256; |
| break; |
| case arch::ArmIdAa64IsaR0El1::Sha2::kNone: |
| break; |
| } |
| if (isar0.crc32() != arch::ArmIdAa64IsaR0El1::Crc32::kNone) { |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_CRC32; |
| } |
| if (isar0.atomic() != arch::ArmIdAa64IsaR0El1::Atomic::kNone) { |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_ATOMICS; |
| } |
| if (isar0.rdm() != arch::ArmIdAa64IsaR0El1::Rdm::kNone) { |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_RDM; |
| } |
| if (isar0.sha3() != arch::ArmIdAa64IsaR0El1::Sha3::kNone) { |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_SHA3; |
| } |
| if (isar0.sm3() != arch::ArmIdAa64IsaR0El1::Sm3::kNone) { |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_SM3; |
| } |
| if (isar0.sm4() != arch::ArmIdAa64IsaR0El1::Sm4::kNone) { |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_SM4; |
| } |
| if (isar0.dp() != arch::ArmIdAa64IsaR0El1::DotProd::kNone) { |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_DP; |
| } |
| if (isar0.fhm() != arch::ArmIdAa64IsaR0El1::Fhm::kNone) { |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_FHM; |
| } |
| if (isar0.ts() != arch::ArmIdAa64IsaR0El1::Ts::kNone) { |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_TS; |
| } |
| if (isar0.rndr() != arch::ArmIdAa64IsaR0El1::Rndr::kNone) { |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_RNDR; |
| } |
| |
| auto isar1 = arch::ArmIdAa64IsaR1El1::Read(); |
| if (isar1.dpb() != arch::ArmIdAa64IsaR1El1::Dpb::kNone) { |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_DPB; |
| } |
| if (isar1.i8mm() != arch::ArmIdAa64IsaR1El1::I8mm::kNone) { |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_I8MM; |
| } |
| |
| auto isar2 = arch::ArmIdAa64IsaR2El1::Read(); |
| if (isar2.mops() != arch::ArmIdAa64IsaR2El1::Mops::kNone) { |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_MOPS; |
| } |
| |
| auto pfr0 = arch::ArmIdAa64Pfr0El1::Read(); |
| if (pfr0.el0() == arch::ArmIdAa64Pfr0El1::El::k32) { |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_ARM32; |
| } |
| if (pfr0.fp() != arch::ArmIdAa64Pfr0El1::Fp::kNone) { |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_FP; |
| } |
| if (pfr0.advsimd() != arch::ArmIdAa64Pfr0El1::Fp::kNone) { |
| arm64_isa_features |= ZX_ARM64_FEATURE_ISA_ASIMD; |
| } |
| if (pfr0.sve() != arch::ArmIdAa64Pfr0El1::Sve::kNone) { |
| // TODO(https://fxbug.dev/42081850): We do not currently report |
| // ZX_ARM64_FEATURE_ISA_SVE even if the processor supports the feature |
| // because Zircon does not have all the supporting code yet. |
| } |
| |
| auto mmfr0 = arch::ArmIdAa64Mmfr0El1::Read(); |
| |
| // check the size of the asid |
| switch (mmfr0.asid_bits()) { |
| default: |
| printf("ARM: warning, unrecognized ASID width value (%u) in ID_AA64MMFR0_EL1\n", |
| static_cast<uint32_t>(mmfr0.asid_bits())); |
| // default to 8 bits |
| [[fallthrough]]; |
| case arch::ArmAsidSize::k8bits: |
| arm64_mmu_features.asid_width = arm64_asid_width::ASID_8; |
| break; |
| case arch::ArmAsidSize::k16bits: |
| arm64_mmu_features.asid_width = arm64_asid_width::ASID_16; |
| break; |
| } |
| |
| // Read the supported stage 1 page granularities. |
| if (mmfr0.tgran4() != 0b1111) { |
| arm64_mmu_features.s1_page_4k = true; |
| } |
| if (mmfr0.tgran16() != 0) { |
| arm64_mmu_features.s1_page_16k = true; |
| } |
| if (mmfr0.tgran64() != 0b1111) { |
| arm64_mmu_features.s1_page_64k = true; |
| } |
| |
| auto mmfr1 = arch::ArmIdAa64Mmfr1El1::Read(); |
| |
| // See about A and D bits in page tables. |
| switch (mmfr1.hafdbs()) { |
| default: |
| case 2: |
| arm64_mmu_features.dirty_bit = true; |
| [[fallthrough]]; |
| case 1: |
| arm64_mmu_features.accessed_bit = true; |
| break; |
| case 0: |
| // No A or D feature implemented |
| break; |
| } |
| |
| // Check for PAN features |
| if (mmfr1.pan() != 0) { |
| arm64_mmu_features.pan = true; |
| |
| // >1 values also determine support for various |
| // address translation instruction variants with PAN. |
| } |
| |
| auto mmfr2 = arch::ArmIdAa64Mmfr2El1::Read(); |
| |
| // Check for User Access Override |
| if (mmfr2.uao() != 0) { |
| arm64_mmu_features.uao = true; |
| } |
| if (mmfr2.ccidx() != 0) { |
| arm64_mmu_features.ccsidx = true; |
| } |
| |
| // Check if FEAT_PMUv3 is enabled. |
| uint64_t pmu_version = (__arm_rsr64("id_aa64dfr0_el1") >> 8) & 0xf; |
| feat_pmuv3_enabled = pmu_version > 0b0000 && pmu_version < 0b1111; |
| } |
| |
| // read the cache info for each cpu |
| arm64_get_cache_info(&(cache_info[cpu])); |
| } |
| |
| static void print_isa_features() { |
| constexpr struct { |
| uint32_t bit; |
| const char* name; |
| } kFeatures[] = { |
| {ZX_ARM64_FEATURE_ISA_FP, "fp"}, {ZX_ARM64_FEATURE_ISA_ASIMD, "asimd"}, |
| {ZX_ARM64_FEATURE_ISA_AES, "aes"}, {ZX_ARM64_FEATURE_ISA_PMULL, "pmull"}, |
| {ZX_ARM64_FEATURE_ISA_SHA1, "sha1"}, {ZX_ARM64_FEATURE_ISA_SHA256, "sha256"}, |
| {ZX_ARM64_FEATURE_ISA_SHA512, "sha512"}, {ZX_ARM64_FEATURE_ISA_CRC32, "crc32"}, |
| {ZX_ARM64_FEATURE_ISA_ATOMICS, "atomics"}, {ZX_ARM64_FEATURE_ISA_RDM, "rdm"}, |
| {ZX_ARM64_FEATURE_ISA_SHA3, "sha3"}, {ZX_ARM64_FEATURE_ISA_SM3, "sm3"}, |
| {ZX_ARM64_FEATURE_ISA_SM4, "sm4"}, {ZX_ARM64_FEATURE_ISA_DP, "dp"}, |
| {ZX_ARM64_FEATURE_ISA_DPB, "dpb"}, {ZX_ARM64_FEATURE_ISA_FHM, "fhm"}, |
| {ZX_ARM64_FEATURE_ISA_TS, "ts"}, {ZX_ARM64_FEATURE_ISA_RNDR, "rndr"}, |
| {ZX_ARM64_FEATURE_ISA_I8MM, "i8mm"}, {ZX_ARM64_FEATURE_ISA_SVE, "sve"}, |
| {ZX_ARM64_FEATURE_ISA_ARM32, "arm32"}, {ZX_ARM64_FEATURE_ISA_MOPS, "mops"}, |
| }; |
| |
| printf("ARM ISA Features: "); |
| uint col = 0; |
| for (const auto& feature : kFeatures) { |
| if (arm64_feature_test(feature.bit)) { |
| col += printf("%s ", feature.name); |
| } |
| if (col >= 80) { |
| printf("\n"); |
| col = 0; |
| } |
| } |
| if (col > 0) { |
| printf("\n"); |
| } |
| } |
| |
| // dump the feature set |
| // print additional information if full is passed |
| void arm64_feature_debug(bool full) { |
| print_cpu_info(); |
| |
| if (full) { |
| print_isa_features(); |
| dprintf(INFO, "ARM ASID width %s\n", |
| (arm64_asid_width() == arm64_asid_width::ASID_16) ? "16" : "8"); |
| dprintf(INFO, "ARM Supported S1 Page sizes (4k/16k/64k): %d/%d/%d\n", |
| arm64_mmu_features.s1_page_4k, arm64_mmu_features.s1_page_16k, |
| arm64_mmu_features.s1_page_64k); |
| dprintf(INFO, "ARM accessed bit %d, dirty bit %d\n", arm64_mmu_features.accessed_bit, |
| arm64_mmu_features.dirty_bit); |
| dprintf(INFO, "ARM PAN %d, UAO %d\n", arm64_mmu_features.pan, arm64_mmu_features.uao); |
| dprintf(INFO, "ARM cache line sizes: icache %u dcache %u zva %u\n", arm64_icache_size, |
| arm64_dcache_size, arm64_zva_size); |
| if (DPRINTF_ENABLED_FOR_LEVEL(INFO)) { |
| arm64_dump_cache_info(arch_curr_cpu_num()); |
| } |
| } |
| } |
