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94 lines
3.4 KiB
C
94 lines
3.4 KiB
C
// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "cpu_features_macros.h"
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#ifdef CPU_FEATURES_ARCH_MIPS
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#if defined(CPU_FEATURES_OS_LINUX) || defined(CPU_FEATURES_OS_ANDROID)
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#include "cpuinfo_mips.h"
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////////////////////////////////////////////////////////////////////////////////
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// Definitions for introspection.
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////////////////////////////////////////////////////////////////////////////////
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#define INTROSPECTION_TABLE \
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LINE(MIPS_MSA, msa, "msa", MIPS_HWCAP_MSA, 0) \
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LINE(MIPS_EVA, eva, "eva", 0, 0) \
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LINE(MIPS_R6, r6, "r6", MIPS_HWCAP_R6, 0) \
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LINE(MIPS_MIPS16, mips16, "mips16", MIPS_HWCAP_MIPS16, 0) \
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LINE(MIPS_MDMX, mdmx, "mdmx", MIPS_HWCAP_MDMX, 0) \
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LINE(MIPS_MIPS3D, mips3d, "mips3d", MIPS_HWCAP_MIPS3D, 0) \
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LINE(MIPS_SMART, smart, "smartmips", MIPS_HWCAP_SMARTMIPS, 0) \
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LINE(MIPS_DSP, dsp, "dsp", MIPS_HWCAP_DSP, 0)
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#define INTROSPECTION_PREFIX Mips
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#define INTROSPECTION_ENUM_PREFIX MIPS
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#include "define_introspection_and_hwcaps.inl"
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////////////////////////////////////////////////////////////////////////////////
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// Implementation.
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////////////////////////////////////////////////////////////////////////////////
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#include "internal/filesystem.h"
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#include "internal/hwcaps.h"
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#include "internal/stack_line_reader.h"
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#include "internal/string_view.h"
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static bool HandleMipsLine(const LineResult result,
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MipsFeatures* const features) {
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StringView key, value;
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// See tests for an example.
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if (CpuFeatures_StringView_GetAttributeKeyValue(result.line, &key, &value)) {
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if (CpuFeatures_StringView_IsEquals(key, str("ASEs implemented"))) {
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for (size_t i = 0; i < MIPS_LAST_; ++i) {
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kSetters[i](features, CpuFeatures_StringView_HasWord(
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value, kCpuInfoFlags[i], ' '));
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}
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}
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}
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return !result.eof;
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}
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static void FillProcCpuInfoData(MipsFeatures* const features) {
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const int fd = CpuFeatures_OpenFile("/proc/cpuinfo");
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if (fd >= 0) {
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StackLineReader reader;
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StackLineReader_Initialize(&reader, fd);
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for (;;) {
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if (!HandleMipsLine(StackLineReader_NextLine(&reader), features)) {
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break;
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}
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}
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CpuFeatures_CloseFile(fd);
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}
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}
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static const MipsInfo kEmptyMipsInfo;
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MipsInfo GetMipsInfo(void) {
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// capabilities are fetched from both getauxval and /proc/cpuinfo so we can
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// have some information if the executable is sandboxed (aka no access to
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// /proc/cpuinfo).
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MipsInfo info = kEmptyMipsInfo;
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FillProcCpuInfoData(&info.features);
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const HardwareCapabilities hwcaps = CpuFeatures_GetHardwareCapabilities();
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for (size_t i = 0; i < MIPS_LAST_; ++i) {
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if (CpuFeatures_IsHwCapsSet(kHardwareCapabilities[i], hwcaps)) {
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kSetters[i](&info.features, true);
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}
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}
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return info;
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}
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#endif // defined(CPU_FEATURES_OS_LINUX) || defined(CPU_FEATURES_OS_ANDROID)
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#endif // CPU_FEATURES_ARCH_MIPS
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