Differential D3031 Diff 13622 source/lib/sysdep/arch/x86_x64/cache.h

Changeset View

Standalone View

source/lib/sysdep/arch/x86_x64/cache.h

/* Copyright (C) 2018 Wildfire Games.		/* Copyright (C) 2020 Wildfire Games.
*		*
* Permission is hereby granted, free of charge, to any person obtaining		* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the		* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including		* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,		* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to		* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to		* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:		* the following conditions:
*		*
* The above copyright notice and this permission notice shall be included		* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.		* in all copies or substantial portions of the Software.
*		*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,		* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF		* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.		* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY		* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,		* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE		* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.		* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/		*/

		#include "lib/sysdep/arch/x86_x64/x86_x64.h"

#ifndef INCLUDED_X86_X64_CACHE		#ifndef INCLUDED_X86_X64_CACHE
#define INCLUDED_X86_X64_CACHE		#define INCLUDED_X86_X64_CACHE

namespace x86_x64 {		namespace x86_x64 {

struct Cache // POD (may be used before static constructors)		struct Cache // POD (may be used before static constructors)
{		{
enum Type		enum Type
▲ Show 20 Lines • Show All 49 Lines • ▼ Show 20 Lines	void Initialize(size_t level, Type type)
m_Associativity = 0;		m_Associativity = 0;
m_SharedBy = 0;		m_SharedBy = 0;

ENSURE(Validate());		ENSURE(Validate());
}		}

bool Validate() const		bool Validate() const
{		{
		// TODO: The cache detection for Ryzen CPUs isn't implemented yet.
		// Returning true is a workaround, to protect the system from crash.
		// For a correct implementation please look here: https://community.amd.com/thread/244207
		if (x86_x64::Vendor() == x86_x64::VENDOR_AMD)
		return true;

if(!(1 <= m_Level && m_Level <= maxLevels))		if(!(1 <= m_Level && m_Level <= maxLevels))
return false;		return false;

if(m_Type == kNull)		if(m_Type == kNull)
return false;		return false;

if(m_NumEntries == 0) // disabled		if(m_NumEntries == 0) // disabled
{		{
▲ Show 20 Lines • Show All 49 Lines • Show Last 20 Lines