103 lines
2.8 KiB
C
103 lines
2.8 KiB
C
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/**********************************************************
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* Copyright 2008-2009 VMware, Inc. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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**********************************************************/
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/*
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* gmr.h --
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*
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* Utilities for creating and Guest Memory Regions (GMRs)
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*/
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#ifndef __GMR_H__
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#define __GMR_H__
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/*
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* Macros for physical memory pages, in our flat memory model.
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* Physical Page Numbers (PPNs) are identity-mapped to virtual
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* addresses in Metalkit.
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*/
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#define PAGE_SIZE 4096
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#define PAGE_MASK (PAGE_SIZE - 1)
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#define PPN_POINTER(ppn) ((void*)((ppn)*PAGE_SIZE))
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typedef uint32 PPN;
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/*
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* Global GMR state, read in by GMR_Init.
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*/
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typedef struct GMRState {
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uint32 maxIds;
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uint32 maxDescriptorLen;
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} GMRState;
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extern GMRState gGMR;
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/*
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* Trivial memory heap, used as system memory backings for GMRs. We
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* never actually free any memory, we just allocate starting from the
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* top of the binary image and we grow upward until we hit physical
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* memory which isn't present.
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*/
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void Heap_Reset(void);
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void *Heap_Alloc(uint32 bytes);
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PPN Heap_AllocPages(uint32 numPages);
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void Heap_Discard(void *data, uint32 bytes);
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void Heap_DiscardPages(PPN firstPage, uint32 numPages);
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/*
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* Read GMR capabilities into gGMR, and Panic if GMRs are not
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* supported.
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*/
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void GMR_Init(void);
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/*
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* Creating GMR descriptors.
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*/
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PPN GMR_AllocDescriptor(SVGAGuestMemDescriptor *descArray,
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uint32 numDescriptors);
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/*
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* Creating/destroying GMRs
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*/
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void GMR_Define(uint32 gmrId,
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SVGAGuestMemDescriptor *descArray,
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uint32 numDescriptors);
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PPN GMR_DefineContiguous(uint32 gmrId, uint32 numPages);
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PPN GMR_DefineEvenPages(uint32 gmrId, uint32 numPages);
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void GMR_FreeAll(void);
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#endif /* __GMR_H__ */
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