53 lines
1018 B
C
53 lines
1018 B
C
/*
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* Copyright (c) 2026, Chloe M.
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* Provided under the BSD-3 clause.
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*
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* Description: TLB related helpers
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* Author: Chloe M.
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*/
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#ifndef _MACHINE_TLB_H_
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#define _MACHINE_TLB_H_ 1
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#include <ptdef.h>
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#include <hal/page.h>
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/*
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* Flush a single virtual address from the translation
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* lookaside buffer.
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*
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* @VirtualBase: Virtual address to flush
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*/
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ALWAYS_INLINE static inline VOID
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MdTlbFlushSingle(UPTR VirtualBase)
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{
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VirtualBase = ALIGN_DOWN(VirtualBase, PAGESIZE);
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ASMV(
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"invlpg %0"
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:
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: "m" (VirtualBase)
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: "memory"
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);
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}
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/*
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* Flush all entries from the translation lookaside buffer.
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*
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* XXX: This should be used quite judiciously due to the
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* collateral damage caused by this operation which
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* incurs a large performance penalty.
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*/
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ALWAYS_INLINE static inline VOID
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MdTlbFlushAll(VOID)
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{
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ASMV(
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"mov %%cr3, %%rax\n"
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"mov %%rax, %%cr3"
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:
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:
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: "memory", "rax"
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);
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}
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#endif /* !_MACHINE_TLB_H_ */
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