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Add FreeBSD Arm64 support (google#295)
* Add FreeBSD Arm64 detection Getting all the features is handled by reading /var/run/dmesg.boot. Feature detections were taken from the freebsd kernel code sys/arm64/arm64/identcpu.c * Add FreeBSD Arm64 tests * Add flagm, flagm2 and rng detection * Add HWCAP FreeBSD AArch64 * Update include to use linux hwcaps for powerpc * Add FreeBSD aarch64 impl * Separate Hwacps to freebsd and linux implementation * Add aarch64 midr_el1 implementation * Add detection hwcap cpuid to hwcaps.h * Add MIDR_EL1 tests
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| Original file line number | Diff line number | Diff line change |
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| // Copyright 2023 Google LLC | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| #ifndef CPU_FEATURES_INCLUDE_CPUID_AARCH64_H_ | ||
| #define CPU_FEATURES_INCLUDE_CPUID_AARCH64_H_ | ||
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| #include <stdint.h> | ||
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| #include "cpu_features_macros.h" | ||
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| CPU_FEATURES_START_CPP_NAMESPACE | ||
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| uint64_t GetMidrEl1(void); | ||
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| CPU_FEATURES_END_CPP_NAMESPACE | ||
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| #endif // CPU_FEATURES_INCLUDE_CPUID_AARCH64_H_ |
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| // Copyright 2023 Google LLC | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| #include "cpu_features_macros.h" | ||
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| #ifdef CPU_FEATURES_OS_FREEBSD | ||
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| #include "internal/hwcaps.h" | ||
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| #ifdef CPU_FEATURES_TEST | ||
| // In test mode, hwcaps_for_testing will define the following functions. | ||
| HardwareCapabilities CpuFeatures_GetHardwareCapabilities(void); | ||
| const char* CpuFeatures_GetPlatformPointer(void); | ||
| const char* CpuFeatures_GetBasePlatformPointer(void); | ||
| #else | ||
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| #ifdef HAVE_STRONG_ELF_AUX_INFO | ||
| #include <stddef.h> | ||
| #include <sys/auxv.h> | ||
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| static unsigned long GetElfHwcapFromElfAuxInfo(int hwcap_type) { | ||
| unsigned long hwcap; | ||
| elf_aux_info(hwcap_type, &hwcap, sizeof(hwcap)); | ||
| return hwcap; | ||
| } | ||
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| HardwareCapabilities CpuFeatures_GetHardwareCapabilities(void) { | ||
| HardwareCapabilities capabilities; | ||
| capabilities.hwcaps = GetElfHwcapFromElfAuxInfo(AT_HWCAP); | ||
| capabilities.hwcaps2 = GetElfHwcapFromElfAuxInfo(AT_HWCAP2); | ||
| return capabilities; | ||
| } | ||
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| const char *CpuFeatures_GetPlatformPointer(void) { return NULL; } | ||
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| const char *CpuFeatures_GetBasePlatformPointer(void) { return NULL; } | ||
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| #else | ||
| #error "FreeBSD needs support for elf_aux_info" | ||
| #endif // HAVE_STRONG_ELF_AUX_INFO | ||
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| #endif // CPU_FEATURES_TEST | ||
| #endif // CPU_FEATURES_OS_FREEBSD |
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