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Merge pull request #864 from Sonicadvance1/cpuid_15h

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Implements CPUID 15h
This commit is contained in:
Stefanos Kornilios Mitsis Poiitidis 2021-03-19 10:02:02 +02:00 committed by GitHub
commit a7dc9d00d2
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2 changed files with 42 additions and 1 deletions
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42
External/FEXCore/Source/Interface/Core/CPUID.cpp vendored
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@ -3,9 +3,33 @@
#include "git_version.h"
#include <cstring>
#ifdef _M_X86_64
#include <cpuid.h>
#endif
namespace FEXCore {
//#define CPUID_AMD
#ifdef _M_ARM_64
static uint32_t GetCycleCounterFrequency() {
uint64_t Result{};
__asm("mrs %[Res], CNTFRQ_EL0"
: [Res] "=r" (Result));
return Result;
}
#else
static uint32_t GetCycleCounterFrequency() {
uint32_t eax, ebx, ecx, edx;
__cpuid(0, eax, ebx, ecx, edx);
if (eax >= 0x15) {
__cpuid(0x15, eax, ebx, ecx, edx);
if (eax && ebx && ecx) {
return ecx * ebx / eax;
}
}
return 0;
}
#endif
FEXCore::CPUID::FunctionResults CPUIDEmu::Function_0h() {
FEXCore::CPUID::FunctionResults Res{};
@ -251,6 +275,18 @@ FEXCore::CPUID::FunctionResults CPUIDEmu::Function_07h() {
return Res;
}
FEXCore::CPUID::FunctionResults CPUIDEmu::Function_15h() {
FEXCore::CPUID::FunctionResults Res{};
// TSC frequency = ECX * EBX / EAX
uint32_t FrequencyHz = GetCycleCounterFrequency();
if (FrequencyHz) {
Res.eax = 1;
Res.ebx = 1;
Res.ecx = FrequencyHz;
}
return Res;
}
// Highest extended function implemented
FEXCore::CPUID::FunctionResults CPUIDEmu::Function_8000_0000h() {
FEXCore::CPUID::FunctionResults Res{};
@ -479,7 +515,11 @@ void CPUIDEmu::Init(FEXCore::Context::Context *ctx) {
// 0x12: Intel SGX capability enumeration
// 0x13: Reserved
// 0x14: Intel Processor trace
// 0x15: Timestamp counter information
#ifndef CPUID_AMD
// Timestamp counter information
// Doesn't exist on AMD hardware
RegisterFunction(0x15, std::bind(&CPUIDEmu::Function_15h, this));
#endif
// 0x16: Processor frequency information
// 0x17: SoC vendor attribute enumeration

1
External/FEXCore/Source/Interface/Core/CPUID.h vendored
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@ -51,6 +51,7 @@ private:
FEXCore::CPUID::FunctionResults Function_02h();
FEXCore::CPUID::FunctionResults Function_06h();
FEXCore::CPUID::FunctionResults Function_07h();
FEXCore::CPUID::FunctionResults Function_15h();
FEXCore::CPUID::FunctionResults Function_8000_0000h();
FEXCore::CPUID::FunctionResults Function_8000_0001h();
FEXCore::CPUID::FunctionResults Function_8000_0002h();