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/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Types.h>
namespace Kernel {
class CPUID {
public:
explicit CPUID(u32 function, u32 ecx = 0) { asm volatile("cpuid"
: "=a"(m_eax), "=b"(m_ebx), "=c"(m_ecx), "=d"(m_edx)
: "a"(function), "c"(ecx)); }
u32 eax() const { return m_eax; }
u32 ebx() const { return m_ebx; }
u32 ecx() const { return m_ecx; }
u32 edx() const { return m_edx; }
private:
u32 m_eax { 0xffffffff };
u32 m_ebx { 0xffffffff };
u32 m_ecx { 0xffffffff };
u32 m_edx { 0xffffffff };
};
// FIXME: This can't hold every CPU feature as-is.
enum class CPUFeature : u32 {
NX = (1 << 0),
PAE = (1 << 1),
PGE = (1 << 2),
RDRAND = (1 << 3),
RDSEED = (1 << 4),
SMAP = (1 << 5),
SMEP = (1 << 6),
SSE = (1 << 7),
TSC = (1 << 8),
RDTSCP = (1 << 9),
CONSTANT_TSC = (1 << 10),
NONSTOP_TSC = (1 << 11),
UMIP = (1 << 12),
SEP = (1 << 13),
SYSCALL = (1 << 14),
MMX = (1 << 15),
SSE2 = (1 << 16),
SSE3 = (1 << 17),
SSSE3 = (1 << 18),
SSE4_1 = (1 << 19),
SSE4_2 = (1 << 20),
XSAVE = (1 << 21),
AVX = (1 << 22),
FXSR = (1 << 23),
LM = (1 << 24),
HYPERVISOR = (1 << 25),
};
}
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