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[BOOTLIB]: Don't use __getcallerseflags() in Archx86IsCpuidSupported -- __readeflags should be good enough.

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svn path=/trunk/; revision=73732
This commit is contained in:
Alex Ionescu 2017-02-06 19:34:15 +00:00
parent 61c4b92f67
commit 1566f90e46
3 changed files with 105 additions and 88 deletions
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17
reactos/boot/environ/include/bl.h
View file

@ -1562,6 +1562,11 @@ BlTimeQueryPerformanceCounter (
_Out_opt_ PLARGE_INTEGER Frequency
);
ULONGLONG
BlArchGetPerformanceCounter (
VOID
);
/* RESOURCE LOCALE INTERNATIONALIZATION ROUTINES *****************************/
NTSTATUS
@ -1655,6 +1660,18 @@ BlStatusError (
/* UTILITY ROUTINES **********************************************************/
VOID
BlArchCpuId (
_In_ ULONG Function,
_In_ ULONG SubFunction,
_Out_ INT* Result
);
BOOLEAN
BlArchIsCpuIdFunctionSupported (
_In_ ULONG Function
);
VOID
BlUtlUpdateProgress (
_In_ ULONG Percentage,

88
reactos/boot/environ/lib/misc/util.c
View file

@ -776,3 +776,91 @@ BlUtlCheckSum (
return PartialSum;
}
BOOLEAN
Archx86IsCpuidSupported (
VOID
)
{
ULONG CallerFlags, Flags;
/* Read the original flags, and add the CPUID bit */
CallerFlags = __readeflags() ^ 0x200000;
__writeeflags(CallerFlags);
/* Read our flags now */
Flags = __readeflags();
/* Check if the bit stuck */
return (((CallerFlags ^ Flags) >> 21) & 1) ^ 1;
}
BOOLEAN
BlArchIsCpuIdFunctionSupported (
_In_ ULONG Function
)
{
BOOLEAN Supported;
INT CpuInfo[4];
/* Check if the CPU supports this instruction */
Supported = Archx86IsCpuidSupported();
if (!Supported)
{
return FALSE;
}
/* Check if it's the extended function */
if (Function >= 0x80000000)
{
/* Check if extended functions are supported */
__cpuid(CpuInfo, 0x80000000);
if ((CpuInfo[0] & 0xFFFFFF00) != 0x80000000)
{
/* Nope */
return FALSE;
}
}
else
{
/* It's a regular function, get the maximum one supported */
__cpuid(CpuInfo, 0);
}
/* Check if our function is within bounds */
if (Function <= CpuInfo[0])
{
return TRUE;
}
/* Nope */
return FALSE;
}
ULONGLONG
BlArchGetPerformanceCounter (
VOID
)
{
INT CpuInfo[4];
/* Serialize with CPUID, if it exists */
if (Archx86IsCpuidSupported())
{
BlArchCpuId(0, 0, CpuInfo);
}
/* Read the TSC */
return __rdtsc();
}
VOID
BlArchCpuId (
_In_ ULONG Function,
_In_ ULONG SubFunction,
_Out_ INT* Result
)
{
/* Use the intrinsic */
__cpuidex(Result, Function, SubFunction);
}

88
reactos/boot/environ/lib/mm/i386/mmx86.c
View file

@ -227,94 +227,6 @@ MmArchTranslateVirtualAddress (
return Descriptor != NULL;
}
BOOLEAN
Archx86IsCpuidSupported (
VOID
)
{
ULONG CallerFlags, Flags;
/* Read the original flags, and add the CPUID bit */
CallerFlags = __getcallerseflags() ^ 0x200000;
__writeeflags(CallerFlags);
/* Read our flags now */
Flags = __readeflags();
/* Check if the bit stuck */
return (((CallerFlags ^ Flags) >> 21) & 1) ^ 1;
}
BOOLEAN
BlArchIsCpuIdFunctionSupported (
_In_ ULONG Function
)
{
BOOLEAN Supported;
INT CpuInfo[4];
/* Check if the CPU supports this instruction */
Supported = Archx86IsCpuidSupported();
if (!Supported)
{
return FALSE;
}
/* Check if it's the extended function */
if (Function >= 0x80000000)
{
/* Check if extended functions are supported */
__cpuid(CpuInfo, 0x80000000);
if ((CpuInfo[0] & 0xFFFFFF00) != 0x80000000)
{
/* Nope */
return FALSE;
}
}
else
{
/* It's a regular function, get the maximum one supported */
__cpuid(CpuInfo, 0);
}
/* Check if our function is within bounds */
if (Function <= CpuInfo[0])
{
return TRUE;
}
/* Nope */
return FALSE;
}
VOID
BlArchCpuId (
_In_ ULONG Function,
_In_ ULONG SubFunction,
_Out_ INT* Result
)
{
/* Use the intrinsic */
__cpuidex(Result, Function, SubFunction);
}
ULONGLONG
BlArchGetPerformanceCounter (
VOID
)
{
INT CpuInfo[4];
/* Serialize with CPUID, if it exists */
if (Archx86IsCpuidSupported())
{
BlArchCpuId(0, 0, CpuInfo);
}
/* Read the TSC */
return __rdtsc();
}
VOID
MmDefpDestroySelfMap (
VOID