mirror of
https://github.com/libretro/ppsspp.git
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199 lines
4.3 KiB
C++
199 lines
4.3 KiB
C++
// Copyright (C) 2003 Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#include "Common.h"
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#include "CPUDetect.h"
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#include "StringUtils.h"
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#include "FileUtil.h"
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// Only Linux platforms have /proc/cpuinfo
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#if defined(__linux__)
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const char procfile[] = "/proc/cpuinfo";
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// https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-devices-system-cpu
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const char syscpupresentfile[] = "/sys/devices/system/cpu/present";
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std::string GetCPUString()
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{
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std::string line, marker = "Hardware\t: ";
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std::string cpu_string = "Unknown";
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std::fstream file;
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if (!File::OpenCPPFile(file, procfile, std::ios::in))
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return cpu_string;
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while (std::getline(file, line))
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{
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if (line.find(marker) != std::string::npos)
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{
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cpu_string = line.substr(marker.length());
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cpu_string.pop_back(); // Drop the new-line character
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}
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}
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return cpu_string;
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}
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unsigned char GetCPUImplementer()
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{
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std::string line, marker = "CPU implementer\t: ";
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unsigned char implementer = 0;
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std::fstream file;
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if (!File::OpenCPPFile(file, procfile, std::ios::in))
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return 0;
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while (std::getline(file, line))
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{
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if (line.find(marker) != std::string::npos)
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{
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line = line.substr(marker.length());
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sscanf(line.c_str(), "0x%02hhx", &implementer);
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break;
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}
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}
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return implementer;
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}
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unsigned short GetCPUPart()
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{
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std::string line, marker = "CPU part\t: ";
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unsigned short part = 0;
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std::fstream file;
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if (!File::OpenCPPFile(file, procfile, std::ios::in))
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return 0;
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while (std::getline(file, line))
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{
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if (line.find(marker) != std::string::npos)
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{
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line = line.substr(marker.length());
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sscanf(line.c_str(), "0x%03hx", &part);
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break;
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}
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}
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return part;
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}
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bool CheckCPUASE(const std::string& ase)
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{
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std::string line, marker = "ASEs implemented\t: ";
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std::fstream file;
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if (!File::OpenCPPFile(file, procfile, std::ios::in))
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return 0;
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while (std::getline(file, line))
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{
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if (line.find(marker) != std::string::npos)
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{
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std::stringstream line_stream(line);
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std::string token;
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while (std::getline(line_stream, token, ' '))
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{
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if (token == ase)
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return true;
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}
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}
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}
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return false;
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}
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int GetCoreCount()
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{
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std::string line, marker = "processor\t: ";
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int cores = 1;
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std::fstream file;
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if (File::OpenCPPFile(file, syscpupresentfile, std::ios::in))
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{
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int low, high, found;
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std::getline(file, line);
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found = sscanf(line.c_str(), "%d-%d", &low, &high);
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if (found == 1)
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return 1;
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if (found == 2)
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return high - low + 1;
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}
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if (!File::OpenCPPFile(file, procfile, std::ios::in))
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return 1;
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while (std::getline(file, line))
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{
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if (line.find(marker) != std::string::npos)
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++cores;
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}
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return cores;
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}
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#endif
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CPUInfo cpu_info;
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CPUInfo::CPUInfo() {
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Detect();
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}
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// Detects the various cpu features
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void CPUInfo::Detect()
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{
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// Set some defaults here
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HTT = false;
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#ifdef _ARCH_64
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OS64bit = true;
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CPU64bit = true;
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Mode64bit = true;
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#else
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OS64bit = false;
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CPU64bit = false;
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Mode64bit = false;
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#endif
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vendor = VENDOR_OTHER;
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// Get the information about the CPU
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#if !defined(__linux__)
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// Hardcode this for now
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bXBurst1 = false;
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bXBurst2 = false;
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num_cores = 1;
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#else // __linux__
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strncpy(cpu_string, GetCPUString().c_str(), sizeof(cpu_string));
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bXBurst1 = CheckCPUASE("mxu");
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bXBurst2 = CheckCPUASE("mxu2");
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unsigned short CPUPart = GetCPUPart();
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num_cores = GetCoreCount();
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#endif
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}
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// Turn the cpu info into a string we can show
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std::string CPUInfo::Summarize()
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{
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std::string sum;
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if (num_cores == 1)
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sum = StringFromFormat("%s, %i core", cpu_string, num_cores);
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else
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sum = StringFromFormat("%s, %i cores", cpu_string, num_cores);
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if (bXBurst1) sum += ", XBurst1";
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if (bXBurst2) sum += ", XBurst2";
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if (CPU64bit) sum += ", 64-bit";
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return sum;
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}
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