X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=Kernel%2Finclude%2Ftpl_mm_phys_bitmap.h;h=106efd75b2d9f0fc9ae7bfbd73bbd133a0be0a73;hb=HEAD;hp=19ef50963e56fd39617e399b41ef798165690a6b;hpb=ada42e7583b4fa07b30d5c1a3e813c9754ec5e0f;p=tpg%2Facess2.git

diff --git a/Kernel/include/tpl_mm_phys_bitmap.h b/Kernel/include/tpl_mm_phys_bitmap.h
deleted file mode 100644
index 19ef5096..00000000
--- a/Kernel/include/tpl_mm_phys_bitmap.h
+++ /dev/null
@@ -1,400 +0,0 @@
-/*
- * Acess2 Core
- * 
- * include/tpl_mm_phys_bitmap.h
- * Physical Memory Manager Template
- */
-#define DEBUG	0
-
-/*
- * Bitmap Edition
- * 
- * Uses 4.125+PtrSize bytes per page
- */
-
-#define MM_PAGE_REFCOUNTS	MM_PMM_BASE
-#define MM_PAGE_NODES	(MM_PMM_BASE+(MM_MAXPHYSPAGE*sizeof(Uint32)))
-#define MM_PAGE_BITMAP	(MM_PAGE_NODES+(MM_MAXPHYSPAGE*sizeof(void*)))
-
-// === PROTOTYPES ===
-//void	MM_InitPhys_Multiboot(tMBoot_Info *MBoot);
-//tPAddr	MM_AllocPhysRange(int Num, int Bits);
-//tPAddr	MM_AllocPhys(void);
-//void	MM_RefPhys(tPAddr PAddr);
-//void	MM_DerefPhys(tPAddr PAddr);
- int	MM_int_GetRangeID( tPAddr Addr );
- int	MM_int_GetMapEntry( void *Data, int Index, tPAddr *Start, tPAddr *Length );
-void	MM_Tpl_InitPhys(int MaxRAMPage, void *MemoryMap);
-
-// === GLOBALS ===
-tMutex	glPhysicalPages;
-void	**gapPageNodes = (void*)MM_PAGE_NODES;	//!< Associated VFS Node for each page
-Uint32	*gaiPageReferences = (void*)MM_PAGE_REFCOUNTS;	// Reference Counts
-Uint32	*gaPageBitmaps = (void*)MM_PAGE_BITMAP;	// Used bitmap (1 == avail)
-Uint64	giMaxPhysPage = 0;	// Maximum Physical page
- int	gbPMM_Init = 0;
- int	gaiPhysRangeFirstFree[MM_NUM_RANGES];
- int	gaiPhysRangeLastFree[MM_NUM_RANGES];
- int	gaiPhysRangeNumFree[MM_NUM_RANGES];
-
-// === CODE ===
-/**
- * \brief Initialise the physical memory manager with a passed memory map
- */
-void MM_Tpl_InitPhys(int MaxRAMPage, void *MemoryMap)
-{
-	 int	mapIndex = 0;
-	tPAddr	rangeStart, rangeLen;
-
-	if( MM_PAGE_BITMAP + (MM_MAXPHYSPAGE/8) > MM_PMM_END ) {
-		Log_KernelPanic("PMM", "Config Error, PMM cannot fit data in allocated range");
-	}
-
-	giMaxPhysPage = MaxRAMPage;
-
-	while( MM_int_GetMapEntry(MemoryMap, mapIndex++, &rangeStart, &rangeLen) )
-	{
-		tVAddr	bitmap_page;
-		rangeStart /= PAGE_SIZE;
-		rangeLen /= PAGE_SIZE;
-
-		bitmap_page = (tVAddr)&gaPageBitmaps[rangeStart/32];
-		bitmap_page &= ~(PAGE_SIZE-1);
-
-		// Only need to allocate bitmaps
-		if( !MM_GetPhysAddr( bitmap_page ) ) {
-			if( MM_Allocate( bitmap_page ) ) {
-				Log_KernelPanic("PMM", "Out of memory during init, this is bad");
-				return ;
-			}
-			memset( (void*)bitmap_page, 0, rangeStart/8 & ~(PAGE_SIZE-1) );
-		}
-		
-		// Align to 32 pages
-		for( ; (rangeStart & 31) && rangeLen > 0; rangeStart++, rangeLen-- ) {
-			gaPageBitmaps[rangeStart / 32] |= 1 << (rangeStart&31);
-		}
-		// Mark blocks of 32 as avail
-		for( ; rangeLen > 31; rangeStart += 32, rangeLen -= 32 ) {
-			gaPageBitmaps[rangeStart / 32] = -1;
-		}
-		// Mark the tail
-		for( ; rangeLen > 0; rangeStart ++, rangeLen -- ) {
-			gaPageBitmaps[rangeStart / 32] |= 1 << (rangeStart&31);
-		}
-	}
-
-	gbPMM_Init = 1;
-
-	LEAVE('-');
-}
-
-/**
- * \brief Allocate a contiguous range of physical pages with a maximum
- *        bit size of \a MaxBits
- * \param Pages	Number of pages to allocate
- * \param MaxBits	Maximum size of the physical address
- * \note If \a MaxBits is <= 0, any sized address is used (with preference
- *       to higher addresses)
- */
-tPAddr MM_AllocPhysRange(int Pages, int MaxBits)
-{
-	tPAddr	addr, ret;
-	 int	rangeID;
-	 int	nFree = 0, i;
-	
-	ENTER("iPages iBits", Pages, MaxBits);
-
-	// Get range ID	
-	if( MaxBits <= 0 || MaxBits >= 64 )	// Speedup for the common case
-		rangeID = MM_RANGE_MAX;
-	else
-		rangeID = MM_int_GetRangeID( (1LL << MaxBits) - 1 );
-	
-	Mutex_Acquire(&glPhysicalPages);
-	
-	// Check if the range actually has any free pages
-	while(gaiPhysRangeNumFree[rangeID] == 0 && rangeID)
-		rangeID --;
-	
-	LOG("rangeID = %i", rangeID);
-
-	// Check if there is enough in the range
-	if(gaiPhysRangeNumFree[rangeID] >= Pages)
-	{
-		LOG("{%i,0x%x -> 0x%x}",
-			giPhysRangeFree[rangeID],
-			giPhysRangeFirst[rangeID], giPhysRangeLast[rangeID]
-			);
-		// Do a cheap scan, scanning upwards from the first free page in
-		// the range
-		nFree = 0;
-		addr = gaiPhysRangeFirstFree[ rangeID ];
-		while( addr <= gaiPhysRangeLastFree[ rangeID ] )
-		{
-			#if USE_SUPER_BITMAP
-			// Check the super bitmap
-			if( gaSuperBitmap[addr / (32*32)] == 0 )
-			{
-				LOG("nFree = %i = 0 (super) (0x%x)", nFree, addr);
-				nFree = 0;
-				addr += 1LL << (6+6);
-				addr &= ~0xFFF;	// (1LL << 6+6) - 1
-				continue;
-			}
-			#endif
-			// Check page block (32 pages)
-			if( gaPageBitmaps[addr / 32] == 0) {
-				LOG("nFree = %i = 0 (main) (0x%x)", nFree, addr);
-				nFree = 0;
-				addr += 1LL << (6);
-				addr &= ~0x3F;
-				continue;
-			}
-			// Check individual page
-			if( !(gaPageBitmaps[addr / 32] & (1LL << (addr & 31))) )
-			{
-				LOG("nFree = %i = 0 (page) (0x%x)", nFree, addr);
-				nFree = 0;
-				addr ++;
-				continue;
-			}
-			nFree ++;
-			addr ++;
-			LOG("nFree(%i) == %i (0x%x)", nFree, Pages, addr);
-			if(nFree == Pages)
-				break;
-		}
-		LOG("nFree = %i", nFree);
-		// If we don't find a contiguous block, nFree will not be equal
-		// to Num, so we set it to zero and do the expensive lookup.
-		if(nFree != Pages)	nFree = 0;
-	}
-	
-	if( !nFree )
-	{
-		// Oops. ok, let's do an expensive check (scan down the list
-		// until a free range is found)
-		nFree = 1;
-		addr = gaiPhysRangeLastFree[ rangeID ];
-		// TODO
-		Mutex_Release(&glPhysicalPages);
-		// TODO: Page out
-		// ATM. Just Warning
-		Warning(" MM_AllocPhysRange: Out of memory (unable to fulfil request for %i pages)", Pages);
-		Log_Warning("PMM",
-			"Out of memory (unable to fulfil request for %i pages)",
-			Pages	
-			);
-		LEAVE('i', 0);
-		return 0;
-	}
-	LOG("nFree = %i, addr = 0x%08x", nFree, addr);
-	
-	// Mark pages as allocated
-	addr -= Pages;
-	for( i = 0; i < Pages; i++, addr++ )
-	{
-		// Mark as used
-		gaPageBitmaps[addr / 32] &= ~(1 << (addr & 31));
-		// Maintain first possible free
-		rangeID = MM_int_GetRangeID(addr * PAGE_SIZE);
-		gaiPhysRangeNumFree[ rangeID ] --;
-		if(addr == gaiPhysRangeFirstFree[ rangeID ])
-			gaiPhysRangeFirstFree[ rangeID ] += 1;
-	
-		// Mark as referenced if the reference count page is valid	
-		if(MM_GetPhysAddr( (tVAddr)&gaiPageReferences[addr] )) {
-			gaiPageReferences[addr] = 1;
-		}
-	}
-	ret = addr;	// Save the return address
-	
-	#if USE_SUPER_BITMAP
-	// Update super bitmap
-	Pages += addr & (32-1);
-	addr &= ~(32-1);
-	Pages = (Pages + (32-1)) & ~(32-1);
-	for( i = 0; i < Pages/32; i++ )
-	{
-		if( gaPageBitmaps[ addr / 32 ] + 1 == 0 )
-			gaSuperBitmap[addr / (32*32)] |= 1LL << ((addr / 32) & 31);
-	}
-	#endif
-	
-	Mutex_Release(&glPhysicalPages);
-	LEAVE('x', ret << 12);
-	return ret << 12;
-}
-
-/**
- * \brief Allocate a single physical page, with no preference as to address size.
- */
-tPAddr MM_AllocPhys(void)
-{
-	 int	i;
-
-	if( !gbPMM_Init )
-	{	
-		// Hack to allow allocation during setup
-		for(i = 0; i < NUM_STATIC_ALLOC; i++) {
-			if( gaiStaticAllocPages[i] ) {
-				tPAddr	ret = gaiStaticAllocPages[i];
-				gaiStaticAllocPages[i] = 0;
-				Log("MM_AllocPhys: Return %x, static alloc %i", ret, i);
-				return ret;
-			}
-		}
-		
-		tPAddr	ret = 0;
-		for( ret = 0; ret < giMaxPhysPage; ret ++ )
-		{
-			if( !MM_GetPhysAddr( (tVAddr)&gaPageBitmaps[ret/32] ) ) {
-				ret += PAGE_SIZE*8;
-				continue ;
-			}
-			if( gaPageBitmaps[ret/32] == 0 ) {
-				ret += 32-1;
-				continue ;
-			}
-			if( gaPageBitmaps[ret/32] & (1 << (ret&31)) ) {
-				gaPageBitmaps[ret/32] &= ~(1 << (ret&31));
-				return ret * PAGE_SIZE;
-			}
-		}
-		Log_Error("PMM", "MM_AllocPhys failed duing init");
-		return 0;
-	}
-	
-	return MM_AllocPhysRange(1, -1);
-}
-
-/**
- * \brief Reference a physical page
- */
-void MM_RefPhys(tPAddr PAddr)
-{
-	tPAddr	page = PAddr / PAGE_SIZE;
-	
-	if( page >= giMaxPhysPage )	return ;
-	
-	if( gaPageBitmaps[ page / 32 ] & (1LL << (page&31)) )
-	{
-		// Allocate
-		gaPageBitmaps[page / 32] &= ~(1LL << (page&31));
-		#if USE_SUPER_BITMAP
-		if( gaPageBitmaps[page / 32] == 0 )
-			gaSuperBitmap[page / (32*32)] &= ~(1LL << ((page / 32) & 31));
-		#endif
-	}
-	else
-	{
-		tVAddr	refpage = (tVAddr)&gaiPageReferences[page] & ~(PAGE_SIZE-1);
-		// Reference again
-		if( !MM_GetPhysAddr( refpage ) )
-		{
-			if( MM_Allocate(refpage) == 0 ) {
-				// Out of memory, can this be resolved?
-				// TODO: Reclaim memory
-				Log_Error("PMM", "Out of memory (MM_RefPhys)");
-				return ;
-			}
-			memset((void*)refpage, 0, PAGE_SIZE);
-			gaiPageReferences[page] = 2;
-		}
-		else
-			gaiPageReferences[ page ] ++;
-	}
-}
-
-int MM_GetRefCount(tPAddr PAddr)
-{
-	PAddr >>= 12;
-	if( MM_GetPhysAddr( (tVAddr)&gaiPageReferences[PAddr] ) ) {
-		return gaiPageReferences[PAddr];
-	}
-	
-	if( gaPageBitmaps[ PAddr / 32 ] & (1LL << (PAddr&31)) ) {
-		return 1;
-	}
-	
-	return 0;
-}
-
-/**
- * \brief Dereference a physical page
- */
-void MM_DerefPhys(tPAddr PAddr)
-{
-	Uint64	page = PAddr >> 12;
-	
-	if( PAddr >> 12 > giMaxPhysPage )	return ;
-	
-	if( MM_GetPhysAddr( (tVAddr)&gaiPageReferences[page] ) )
-	{
-		if( gaiPageReferences[page] > 0 )
-			gaiPageReferences[ page ] --;
-		if( gaiPageReferences[ page ] == 0 ) {
-			gaPageBitmaps[ page / 32 ] |= 1 << (page&31);
-			// TODO: Catch when all pages in this range have been dereferenced
-		}
-	}
-	else
-		gaPageBitmaps[ page / 32 ] |= 1 << (page&31);
-	// Clear node if needed
-	if( MM_GetPhysAddr( (tVAddr)&gapPageNodes[page] ) ) {
-		gapPageNodes[page] = NULL;
-		// TODO: Catch when all pages in this range are not using nodes
-	}
-	
-	// Update the free counts if the page was freed
-	if( gaPageBitmaps[ page / 32 ] & (1LL << (page&31)) )
-	{
-		 int	rangeID;
-		rangeID = MM_int_GetRangeID( PAddr );
-		gaiPhysRangeNumFree[ rangeID ] ++;
-		if( gaiPhysRangeFirstFree[rangeID] > page )
-			gaiPhysRangeFirstFree[rangeID] = page;
-		if( gaiPhysRangeLastFree[rangeID] < page )
-			gaiPhysRangeLastFree[rangeID] = page;
-	}
-
-	#if USE_SUPER_BITMAP	
-	// If the bitmap entry is not zero, set the bit free in the super bitmap
-	if(gaPageBitmaps[ page / 32 ] != 0 ) {
-		gaSuperBitmap[page / (32*32)] |= 1LL << ((page / 32) & 31);
-	}
-	#endif
-}
-
-int MM_SetPageNode(tPAddr PAddr, void *Node)
-{
-	tPAddr	page = PAddr >> 12;
-	tVAddr	node_page = ((tVAddr)&gapPageNodes[page]) & ~(PAGE_SIZE-1);
-
-	if( !MM_GetRefCount(PAddr) )	return 1;
-	
-	if( !MM_GetPhysAddr(node_page) ) {
-		if( !MM_Allocate(node_page) )
-			return -1;
-		memset( (void*)node_page, 0, PAGE_SIZE );
-	}
-
-	gapPageNodes[page] = Node;
-	return 0;
-}
-
-int MM_GetPageNode(tPAddr PAddr, void **Node)
-{
-	PAddr >>= 12;
-	if( !MM_GetRefCount(PAddr) )	return 1;
-	
-	if( !MM_GetPhysAddr( (tVAddr)&gapPageNodes[PAddr] ) ) {
-		*Node = NULL;
-		return 0;
-	}
-
-	*Node = gapPageNodes[PAddr];
-	return 0;
-}
-