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124 lines
1.8 KiB
C
124 lines
1.8 KiB
C
/** @file
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Base Library CPU Functions for EBC
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Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "BaseLibInternals.h"
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extern
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UINT64
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_break (
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CHAR8 BreakCode
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);
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/**
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Generates a breakpoint on the CPU.
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Generates a breakpoint on the CPU. The breakpoint must be implemented such
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that code can resume normal execution after the breakpoint.
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**/
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VOID
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EFIAPI
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CpuBreakpoint (
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VOID
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)
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{
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_break (3);
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}
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/**
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Used to serialize load and store operations.
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All loads and stores that proceed calls to this function are guaranteed to be
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globally visible when this function returns.
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**/
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VOID
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EFIAPI
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MemoryFence (
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VOID
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)
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{
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}
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/**
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Disables CPU interrupts.
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**/
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VOID
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EFIAPI
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DisableInterrupts (
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VOID
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)
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{
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ASSERT (FALSE);
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}
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/**
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Enables CPU interrupts.
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**/
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VOID
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EFIAPI
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EnableInterrupts (
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VOID
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)
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{
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ASSERT (FALSE);
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}
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/**
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Retrieves the current CPU interrupt state.
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Returns TRUE means interrupts are currently enabled. Otherwise,
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returns FALSE.
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@retval TRUE CPU interrupts are enabled.
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@retval FALSE CPU interrupts are disabled.
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**/
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BOOLEAN
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EFIAPI
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GetInterruptState (
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VOID
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)
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{
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ASSERT (FALSE);
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return FALSE;
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}
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/**
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Enables CPU interrupts for the smallest window required to capture any
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pending interrupts.
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**/
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VOID
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EFIAPI
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EnableDisableInterrupts (
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VOID
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)
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{
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EnableInterrupts ();
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DisableInterrupts ();
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}
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/**
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Requests CPU to pause for a short period of time.
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Requests CPU to pause for a short period of time. Typically used in MP
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systems to prevent memory starvation while waiting for a spin lock.
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**/
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VOID
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EFIAPI
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CpuPause (
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VOID
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)
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{
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}
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