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Kernel now uses SSE instructions properly

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This commit is contained in:
Alex
2023-01-03 06:36:15 +02:00
parent 450fe4f0ac
commit 4501826025
13 changed files with 1270 additions and 572 deletions
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39
Tasking/Task.cpp
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@ -788,8 +788,8 @@ namespace Tasking
Thread->ExitCode = 0xdead;
Thread->Status = TaskStatus::Ready;
Thread->Memory = new Memory::MemMgr(Parent->PageTable);
Thread->FPU = (FXState *)Thread->Memory->RequestPages(TO_PAGES(sizeof(FXState)));
memset(Thread->FPU, 0, FROM_PAGES(TO_PAGES(sizeof(FXState))));
Thread->FPU = (CPU::x64::FXState *)Thread->Memory->RequestPages(TO_PAGES(sizeof(CPU::x64::FXState)));
memset(Thread->FPU, 0, FROM_PAGES(TO_PAGES(sizeof(CPU::x64::FXState))));
// TODO: Is really a good idea to use the FPU in kernel mode?
Thread->FPU->mxcsr = 0b0001111110000000;
@ -1169,10 +1169,37 @@ namespace Tasking
debug("Created Kernel Process: %s and Thread: %s", kproc->Name, kthrd->Name);
TaskingLock.Lock(__FUNCTION__);
bool MONITORSupported = false;
if (strcmp(CPU::Vendor(), x86_CPUID_VENDOR_AMD) == 0)
{
#if defined(__amd64__)
uint32_t rax, rbx, rcx, rdx;
CPU::x64::cpuid(0x1, &rax, &rbx, &rcx, &rdx);
if (rcx & CPU::x64::CPUID_FEAT_RCX_MONITOR)
CPU::x64::AMD::CPUID0x1 cpuid1amd;
#elif defined(__i386__)
CPU::x32::AMD::CPUID0x1 cpuid1amd;
#endif
#if defined(__amd64__) || defined(__i386__)
asmv("cpuid"
: "=a"(cpuid1amd.EAX.raw), "=b"(cpuid1amd.EBX.raw), "=c"(cpuid1amd.ECX.raw), "=d"(cpuid1amd.EDX.raw)
: "a"(0x1));
#endif
MONITORSupported = cpuid1amd.ECX.MONITOR;
}
else if (strcmp(CPU::Vendor(), x86_CPUID_VENDOR_INTEL) == 0)
{
#if defined(__amd64__)
CPU::x64::Intel::CPUID0x1 cpuid1intel;
#elif defined(__i386__)
CPU::x32::Intel::CPUID0x1 cpuid1intel;
#endif
#if defined(__amd64__) || defined(__i386__)
asmv("cpuid"
: "=a"(cpuid1intel.EAX.raw), "=b"(cpuid1intel.EBX.raw), "=c"(cpuid1intel.ECX.raw), "=d"(cpuid1intel.EDX.raw)
: "a"(0x1));
#endif
MONITORSupported = cpuid1intel.ECX.MONITOR;
}
if (MONITORSupported)
{
trace("CPU has MONITOR/MWAIT support.");
}
@ -1182,7 +1209,7 @@ namespace Tasking
error("Interrupts are not enabled.");
CPU::Interrupts(CPU::Enable);
}
#endif
TaskingLock.Unlock();
IdleProcess = CreateProcess(nullptr, (char *)"Idle", TaskTrustLevel::Idle);
for (int i = 0; i < SMP::CPUCores; i++)