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