mirror of
https://github.com/reactos/reactos.git
synced 2024-05-19 20:02:03 +00:00
122 lines
2.7 KiB
C
122 lines
2.7 KiB
C
#ifndef _INTRIN_INTERNAL_
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#define _INTRIN_INTERNAL_
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FORCEINLINE
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VOID
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KeSetCurrentIrql(KIRQL Irql)
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{
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__writecr8(Irql);
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}
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FORCEINLINE
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PKGDTENTRY64
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KiGetGdtEntry(PVOID pGdt, USHORT Selector)
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{
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return (PKGDTENTRY64)((ULONG64)pGdt + (Selector & ~RPL_MASK));
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}
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FORCEINLINE
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PVOID
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KiGetGdtDescriptorBase(PKGDTENTRY Entry)
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{
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return (PVOID)((ULONG64)Entry->BaseLow |
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(ULONG64)Entry->Bytes.BaseMiddle << 16 |
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(ULONG64)Entry->Bytes.BaseHigh << 24 |
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(ULONG64)Entry->BaseUpper << 32);
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}
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FORCEINLINE
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VOID
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KiSetGdtDescriptorBase(PKGDTENTRY Entry, ULONG64 Base)
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{
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Entry->BaseLow = Base & 0xffff;
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Entry->Bits.BaseMiddle = (Base >> 16) & 0xff;
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Entry->Bits.BaseHigh = (Base >> 24) & 0xff;
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Entry->BaseUpper = Base >> 32;
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}
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FORCEINLINE
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VOID
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KiSetGdtDescriptorLimit(PKGDTENTRY Entry, ULONG Limit)
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{
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Entry->LimitLow = Limit & 0xffff;
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Entry->Bits.LimitHigh = Limit >> 16;
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}
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FORCEINLINE
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VOID
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KiInitGdtEntry(PKGDTENTRY64 Entry, ULONG64 Base, ULONG Size, UCHAR Type, UCHAR Dpl)
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{
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KiSetGdtDescriptorBase(Entry, Base);
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KiSetGdtDescriptorLimit(Entry, Size - 1);
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Entry->Bits.Type = Type;
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Entry->Bits.Dpl = Dpl;
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Entry->Bits.Present = 1;
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Entry->Bits.System = 0;
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Entry->Bits.LongMode = 0;
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Entry->Bits.DefaultBig = 0;
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Entry->Bits.Granularity = 0;
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Entry->MustBeZero = 0;
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}
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#if defined(__GNUC__)
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static __inline__ __attribute__((always_inline)) void __lgdt(void *Source)
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{
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__asm__ __volatile__("lgdt %0" : : "m"(*(short*)Source));
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}
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static __inline__ __attribute__((always_inline)) void __sgdt(void *Destination)
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{
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__asm__ __volatile__("sgdt %0" : : "m"(*(short*)Destination) : "memory");
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}
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static __inline__ __attribute__((always_inline)) void __lldt(unsigned short Value)
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{
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__asm__ __volatile__("lldt %0" : : "rm"(Value));
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}
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static __inline__ __attribute__((always_inline)) void __sldt(void *Destination)
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{
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__asm__ __volatile__("sldt %0" : : "m"(*(short*)Destination) : "memory");
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}
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static __inline__ __attribute__((always_inline)) void __ltr(unsigned short Source)
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{
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__asm__ __volatile__("ltr %0" : : "rm"(Source));
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}
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static __inline__ __attribute__((always_inline)) void __str(unsigned short *Destination)
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{
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__asm__ __volatile__("str %0" : : "m"(*Destination) : "memory");
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}
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static __inline__ __attribute__((always_inline)) void __swapgs(void)
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{
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__asm__ __volatile__("swapgs" : : : "memory");
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}
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#elif defined(_MSC_VER)
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void __lgdt(void *Source);
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void __sgdt(void *Destination);
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void __lldt(unsigned short Value);
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void __sldt(void *Destination);
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void __ltr(unsigned short Source);
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void __str(unsigned short *Destination);
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void __swapgs(void);
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#else
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#error Unknown compiler for inline assembler
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#endif
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#endif
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/* EOF */
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