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/* Copyright (C) 2011 Wildfire Games.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef INCLUDED_X86_X64_APIC
#define INCLUDED_X86_X64_APIC
typedef u8 ApicId; // not necessarily contiguous values
/**
* @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).
*
* rationale: the alternative of accessing the APIC mmio registers is not
* feasible - mahaf_MapPhysicalMemory only works reliably on WinXP. we also
* don't want to interfere with the OS's constant use of the APIC registers.
**/
LIB_API ApicId GetApicId();
// if this returns false, apicId = contiguousId = processor.
// otherwise, there are unspecified but bijective mappings between
// apicId<->contiguousId and apicId<->processor.
LIB_API bool AreApicIdsReliable();
LIB_API size_t ProcessorFromApicId(ApicId apicId);
LIB_API size_t ContiguousIdFromApicId(ApicId apicId);
LIB_API ApicId ApicIdFromProcessor(size_t contiguousId);
LIB_API ApicId ApicIdFromContiguousId(size_t contiguousId);
#endif // #ifndef INCLUDED_X86_X64_APIC
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