Differential D2726 Diff 13717 source/lib/sysdep/arch/x86_x64/apic.h

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

	/* Copyright (C) 2011 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:
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	typedef u8 ApicId; // not necessarily contiguous values			typedef u8 ApicId; // not necessarily contiguous values

	/**			/**
	* @return APIC ID of the currently executing processor or zero if the			* @return APIC ID of the currently executing processor or zero if the
	* platform does not have an xAPIC (i.e. 7th generation x86 or below).			* platform does not have an xAPIC (i.e. 7th generation x86 or below).
	*			*
	* rationale: the alternative of accessing the APIC mmio registers is not			* rationale: the alternative of accessing the APIC mmio registers is not
	* feasible - mahaf_MapPhysicalMemory only works reliably on WinXP. we also			* feasible. We also don't want to interfere with the OS's constant use of
	* don't want to interfere with the OS's constant use of the APIC registers.			* the APIC registers.
	**/			**/
	LIB_API ApicId GetApicId();			LIB_API ApicId GetApicId();

	// if this returns false, apicId = contiguousId = processor.			// if this returns false, apicId = contiguousId = processor.
	// otherwise, there are unspecified but bijective mappings between			// otherwise, there are unspecified but bijective mappings between
	// apicId<->contiguousId and apicId<->processor.			// apicId<->contiguousId and apicId<->processor.
	LIB_API bool AreApicIdsReliable();			LIB_API bool AreApicIdsReliable();

	LIB_API size_t ProcessorFromApicId(ApicId apicId);			LIB_API size_t ProcessorFromApicId(ApicId apicId);
	LIB_API size_t ContiguousIdFromApicId(ApicId apicId);			LIB_API size_t ContiguousIdFromApicId(ApicId apicId);

	LIB_API ApicId ApicIdFromProcessor(size_t contiguousId);			LIB_API ApicId ApicIdFromProcessor(size_t contiguousId);
	LIB_API ApicId ApicIdFromContiguousId(size_t contiguousId);			LIB_API ApicId ApicIdFromContiguousId(size_t contiguousId);

	#endif // #ifndef INCLUDED_X86_X64_APIC			#endif // #ifndef INCLUDED_X86_X64_APIC