/*
This file is part of Fennix Kernel.
Fennix Kernel 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, either version 3 of
the License, or (at your option) any later version.
Fennix Kernel 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 for more details.
You should have received a copy of the GNU General Public License
along with Fennix Kernel. If not, see .
*/
#ifndef __FENNIX_KERNEL_CPU_x64_CR_H__
#define __FENNIX_KERNEL_CPU_x64_CR_H__
#include
namespace CPU
{
namespace x64
{
typedef union CR0
{
struct
{
/** @brief Protection Enable */
uint64_t PE : 1;
/** @brief Monitor Coprocessor */
uint64_t MP : 1;
/** @brief Emulation */
uint64_t EM : 1;
/** @brief Task Switched */
uint64_t TS : 1;
/** @brief Extension Type */
uint64_t ET : 1;
/** @brief Numeric Error */
uint64_t NE : 1;
/** @brief Reserved */
uint64_t Reserved0 : 10;
/** @brief Write Protect */
uint64_t WP : 1;
/** @brief Reserved */
uint64_t Reserved1 : 1;
/** @brief Alignment Mask */
uint64_t AM : 1;
/** @brief Reserved */
uint64_t Reserved2 : 10;
/** @brief Not Write-through */
uint64_t NW : 1;
/** @brief Cache Disable */
uint64_t CD : 1;
/** @brief Paging */
uint64_t PG : 1;
};
uint64_t raw;
} CR0;
typedef union CR2
{
struct
{
/** @brief Page Fault Linear Address */
uint64_t PFLA;
};
uint64_t raw;
} CR2;
typedef union CR3
{
struct
{
/** @brief Not used if bit 17 of CR4 is 1 */
uint64_t PWT : 1;
/** @brief Not used if bit 17 of CR4 is 1 */
uint64_t PCD : 1;
/** @brief Base of PML4T/PML5T */
uint64_t PDBR;
};
uint64_t raw;
} CR3;
typedef union CR4
{
struct
{
/** @brief Virtual-8086 Mode Extensions */
uint64_t VME : 1;
/** @brief Protected-Mode Virtual Interrupts */
uint64_t PVI : 1;
/** @brief Time Stamp Disable */
uint64_t TSD : 1;
/** @brief Debugging Extensions */
uint64_t DE : 1;
/** @brief Page Size Extensions */
uint64_t PSE : 1;
/** @brief Physical Address Extension */
uint64_t PAE : 1;
/** @brief Machine Check Enable */
uint64_t MCE : 1;
/** @brief Page Global Enable */
uint64_t PGE : 1;
/** @brief Performance Monitoring Counter */
uint64_t PCE : 1;
/** @brief Operating System Support */
uint64_t OSFXSR : 1;
/** @brief Operating System Support */
uint64_t OSXMMEXCPT : 1;
/** @brief User-Mode Instruction Prevention */
uint64_t UMIP : 1;
/** @brief Linear Address 57bit */
uint64_t LA57 : 1;
/** @brief VMX Enable */
uint64_t VMXE : 1;
/** @brief SMX Enable */
uint64_t SMXE : 1;
/** @brief Reserved */
uint64_t Reserved0 : 1;
/** @brief FSGSBASE Enable */
uint64_t FSGSBASE : 1;
/** @brief PCID Enable */
uint64_t PCIDE : 1;
/** @brief XSAVE and Processor Extended States Enable */
uint64_t OSXSAVE : 1;
/** @brief Reserved */
uint64_t Reserved1 : 1;
/** @brief SMEP Enable */
uint64_t SMEP : 1;
/** @brief SMAP Enable */
uint64_t SMAP : 1;
/** @brief Protection-Key Enable */
uint64_t PKE : 1;
/** @brief Control-flow Enforcement Technology*/
uint32_t CET : 1;
/* @brief Enable Protection Keys for Supervisor Mode Pages */
uint32_t PKS : 1;
/** @brief Reserved */
uint64_t Reserved2 : 7; // TODO: This could be wrong
};
uint64_t raw;
} CR4;
typedef union CR8
{
struct
{
/** @brief Task Priority Level */
uint64_t TPL : 1;
};
uint64_t raw;
} CR8;
typedef union XCR0
{
/*
On https://wiki.osdev.org/CPU_Registers_x86#XCR0 says that the PKRU bit is 9?
*/
struct
{
/** @brief X87 FPU/MMX/SSE Support (must be 1) */
uint64_t X87 : 1;
/** @brief XSAVE support for MXCSR and XMM registers */
uint64_t SSE : 1;
/** @brief AVX support for YMM registers */
uint64_t AVX : 1;
/** @brief MPX support for BND registers */
uint64_t BNDREG : 1;
/** @brief MPX support for BNDCFGU and BNDSTATUS registers */
uint64_t BNDCSR : 1;
/** @brief AVX-512 support for opmask registers */
uint64_t OpMask : 1;
/** @brief AVX-512 enabled and XSAVE support for upper halves of lower ZMM registers */
uint64_t ZMM_HI256 : 1;
/** @brief AVX-512 enabled and XSAVE support for upper ZMM registers */
uint64_t HI16_ZMM : 1;
/** @brief XSAVE support for PKRU register */
uint64_t PKRU : 1;
/** @brief Reserved */
uint64_t Reserved0 : 53;
/** @brief AMD lightweight profiling */
uint64_t LWP : 1;
/** @brief Reserved */
uint64_t Reserved1 : 1;
};
uint64_t raw;
} XCR0;
#if defined(a64)
nsa static inline CR0 readcr0()
{
uint64_t Result = 0;
asmv("mov %%cr0, %[Result]"
: [Result] "=q"(Result));
return (CR0){.raw = Result};
}
nsa static inline CR2 readcr2()
{
uint64_t Result = 0;
asmv("mov %%cr2, %[Result]"
: [Result] "=q"(Result));
return (CR2){.raw = Result};
}
nsa static inline CR3 readcr3()
{
uint64_t Result = 0;
asmv("mov %%cr3, %[Result]"
: [Result] "=q"(Result));
return (CR3){.raw = Result};
}
nsa static inline CR4 readcr4()
{
uint64_t Result = 0;
asmv("mov %%cr4, %[Result]"
: [Result] "=q"(Result));
return (CR4){.raw = Result};
}
nsa static inline CR8 readcr8()
{
uint64_t Result = 0;
asmv("mov %%cr8, %[Result]"
: [Result] "=q"(Result));
return (CR8){.raw = Result};
}
nsa static inline XCR0 readxcr0()
{
uint64_t Result = 0;
asmv("xgetbv"
: "=a"(Result)
: "c"(0)
: "edx");
return (XCR0){.raw = Result};
}
nsa static inline void writecr0(CR0 ControlRegister)
{
asmv("mov %[ControlRegister], %%cr0"
:
: [ControlRegister] "q"(ControlRegister.raw)
: "memory");
}
nsa static inline void writecr2(CR2 ControlRegister)
{
asmv("mov %[ControlRegister], %%cr2"
:
: [ControlRegister] "q"(ControlRegister.raw)
: "memory");
}
nsa static inline void writecr3(CR3 ControlRegister)
{
asmv("mov %[ControlRegister], %%cr3"
:
: [ControlRegister] "q"(ControlRegister.raw)
: "memory");
}
nsa static inline void writecr4(CR4 ControlRegister)
{
asmv("mov %[ControlRegister], %%cr4"
:
: [ControlRegister] "q"(ControlRegister.raw)
: "memory");
}
nsa static inline void writecr8(CR8 ControlRegister)
{
asmv("mov %[ControlRegister], %%cr8"
:
: [ControlRegister] "q"(ControlRegister.raw)
: "memory");
}
nsa static inline void writexcr0(XCR0 ControlRegister)
{
asmv("xsetbv"
:
: "a"(ControlRegister.raw), "c"(0)
: "edx");
}
#endif
}
}
#endif // !__FENNIX_KERNEL_CPU_x64_CR_H__