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Diffstat (limited to 'Source/Core/Common/Src/ArmCPUDetect.cpp')
| -rw-r--r-- | Source/Core/Common/Src/ArmCPUDetect.cpp | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/Source/Core/Common/Src/ArmCPUDetect.cpp b/Source/Core/Common/Src/ArmCPUDetect.cpp new file mode 100644 index 0000000000..33eee9f05e --- /dev/null +++ b/Source/Core/Common/Src/ArmCPUDetect.cpp @@ -0,0 +1,167 @@ +// Copyright (C) 2003 Dolphin Project. + +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, version 2.0. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License 2.0 for more details. + +// A copy of the GPL 2.0 should have been included with the program. +// If not, see http://www.gnu.org/licenses/ + +// Official SVN repository and contact information can be found at +// http://code.google.com/p/dolphin-emu/ + +#include "Common.h" +#include "CPUDetect.h" +#include "StringUtil.h" +#include "FileUtil.h" + +const char procfile[] = "/proc/cpuinfo"; + +char *GetCPUString() +{ + const char marker[] = "Hardware\t: "; + char *cpu_string = 0; + // Count the number of processor lines in /proc/cpuinfo + char buf[1024]; + + File::IOFile file(procfile, "r"); + auto const fp = file.GetHandle(); + if (!fp) + return 0; + + while (fgets(buf, sizeof(buf), fp)) + { + if (strncmp(buf, marker, sizeof(marker) - 1)) + continue; + cpu_string = buf + sizeof(marker) - 1; + cpu_string = strndup(cpu_string, strlen(cpu_string) - 1); // Strip the newline + break; + } + return cpu_string; +} +bool CheckCPUFeature(const char *feature) +{ + const char marker[] = "Features\t: "; + char buf[1024]; + + File::IOFile file(procfile, "r"); + auto const fp = file.GetHandle(); + if (!fp) + return 0; + + while (fgets(buf, sizeof(buf), fp)) + { + if (strncmp(buf, marker, sizeof(marker) - 1)) + continue; + char *featurestring = buf + sizeof(marker) - 1; + char *token = strtok(featurestring, " "); + while (token != NULL) + { + if (strstr(token, feature)) + return true; + token = strtok(NULL, " "); + } + } + return false; +} +int GetCoreCount() +{ + const char marker[] = "processor\t: "; + int cores = 0; + char buf[1024]; + + File::IOFile file(procfile, "r"); + auto const fp = file.GetHandle(); + if (!fp) + return 0; + + while (fgets(buf, sizeof(buf), fp)) + { + if (strncmp(buf, marker, sizeof(marker) - 1)) + continue; + ++cores; + } + return cores; +} + +CPUInfo cpu_info; + +CPUInfo::CPUInfo() { + Detect(); +} + +// Detects the various cpu features +void CPUInfo::Detect() +{ + // Set some defaults here + // When ARMv8 cpus come out, these need to be updated. + HTT = false; + OS64bit = false; + CPU64bit = false; + Mode64bit = false; + vendor = VENDOR_ARM; + + // Get the information about the CPU + strncpy(cpu_string, GetCPUString(), sizeof(cpu_string)); + num_cores = GetCoreCount(); + bSwp = CheckCPUFeature("swp"); + bHalf = CheckCPUFeature("half"); + bThumb = CheckCPUFeature("thumb"); + bFastMult = CheckCPUFeature("fastmult"); + bVFP = CheckCPUFeature("vfp"); + bEDSP = CheckCPUFeature("edsp"); + bThumbEE = CheckCPUFeature("thumbee"); + bNEON = CheckCPUFeature("neon"); + bVFPv3 = CheckCPUFeature("vfpv3"); + bTLS = CheckCPUFeature("tls"); + bVFPv4 = CheckCPUFeature("vfpv4"); + bIDIVa = CheckCPUFeature("idiva"); + bIDIVt = CheckCPUFeature("idivt"); + + // On some buggy kernels(Qualcomm) they show that they support VFPv4 but not IDIVa + // All VFPv4 CPUs will support IDIVa + if (bVFPv4) + bIDIVa = bIDIVt = true; + + // These two are ARMv8 specific. + bFP = CheckCPUFeature("fp"); + bASIMD = CheckCPUFeature("asimd"); + + +#if defined(__ARM_ARCH_7A__) + bArmV7 = true; +#else + bArmV7 = false; +#endif +} + +// Turn the cpu info into a string we can show +std::string CPUInfo::Summarize() +{ + std::string sum; + if (num_cores == 1) + sum = StringFromFormat("%s, %i core", cpu_string, num_cores); + else + sum = StringFromFormat("%s, %i cores", cpu_string, num_cores); + + if (bSwp) sum += ", SWP"; + if (bHalf) sum += ", Half"; + if (bThumb) sum += ", Thumb"; + if (bFastMult) sum += ", FastMult"; + if (bVFP) sum += ", VFP"; + if (bEDSP) sum += ", EDSP"; + if (bThumbEE) sum += ", ThumbEE"; + if (bNEON) sum += ", NEON"; + if (bVFPv3) sum += ", VFPv3"; + if (bTLS) sum += ", TLS"; + if (bVFPv4) sum += ", VFPv4"; + if (bIDIVa) sum += ", IDIVa"; + if (bIDIVt) sum += ", IDIVt"; + + return sum; +} |