Kernel/x86_64 - Commenting and cleanup

[tpg/acess2.git] / Kernel / arch / x86_64 / mm_phys.c

diff --git a/Kernel/arch/x86_64/mm_phys.c b/Kernel/arch/x86_64/mm_phys.c
index fcc8547..893fb5b 100644 (file)
--- a/Kernel/arch/x86_64/mm_phys.c
+++ b/Kernel/arch/x86_64/mm_phys.c
@@ -36,6 +36,7 @@ Uint64        *gaSuperBitmap = (void*)MM_PAGE_SUPBMP; // 1 bit = 64 Pages, 16 MiB per W
 Uint64 *gaMainBitmap = (void*)MM_PAGE_BITMAP;  // 1 bit = 1 Page, 256 KiB per Word
 Uint64 *gaMultiBitmap = (void*)MM_PAGE_DBLBMP; // Each bit means that the page is being used multiple times
 Uint32 *gaiPageReferences = (void*)MM_PAGE_COUNTS;     // Reference Counts
+void   **gapPageNodes = (void*)MM_PAGE_NODES;  // Reference Counts
 tPAddr giFirstFreePage;        // First possibly free page
 Uint64 giPhysRangeFree[NUM_MM_PHYS_RANGES];    // Number of free pages in each range
 Uint64 giPhysRangeFirst[NUM_MM_PHYS_RANGES];   // First free page in each range
@@ -460,7 +461,7 @@ tPAddr MM_AllocPhys(void)
                if( gaiStaticAllocPages[i] ) {
                        tPAddr  ret = gaiStaticAllocPages[i];
                        gaiStaticAllocPages[i] = 0;
-                       Log("MM_AllocPhys: Return %x, static alloc %i", ret, i);
+                       Log("MM_AllocPhys: Return %P, static alloc %i", ret, i);
                        return ret;
                }
        }
@@ -535,6 +536,23 @@ void MM_DerefPhys(tPAddr PAddr)
        }
 }
 
+int MM_GetRefCount( tPAddr PAddr )
+{
+       PAddr >>= 12;
+       
+       if( PAddr >> 12 > giMaxPhysPage )       return 0;
+
+       if( gaMultiBitmap[ PAddr >> 6 ] & (1LL << (PAddr&63)) ) {
+               return gaiPageReferences[PAddr];
+       }
+
+       if( gaMainBitmap[ PAddr >> 6 ] & (1LL << (PAddr&63)) )
+       {
+               return 1;
+       }
+       return 0;
+}
+
 /**
  * \brief Takes a physical address and returns the ID of its range
  * \param Addr Physical address of page
@@ -553,3 +571,35 @@ int MM_int_GetRangeID( tPAddr Addr )
        else
                return MM_PHYS_16BIT;
 }
+
+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)
+{
+//     if( !MM_GetRefCount(PAddr) )    return 1;
+       PAddr >>= 12;
+       
+       if( !MM_GetPhysAddr( (tVAddr)&gapPageNodes[PAddr] ) ) {
+               *Node = NULL;
+               return 0;
+       }
+
+       *Node = gapPageNodes[PAddr];
+       return 0;
+}
+