Uint32 gaSuperBitmap[1024]; // Blocks of 1024 Pages
Uint32 gaPageBitmap[1024*1024/32]; // Individual pages
int *gaPageReferences;
+void **gaPageNodes = (void*)MM_PAGENODE_BASE;
#define REFENT_PER_PAGE (0x1000/sizeof(gaPageReferences[0]))
// === CODE ===
if(gaPageBitmap[ PAddr / 32 ] == 0)
gaSuperBitmap[ PAddr >> 10 ] &= ~(1 << ((PAddr >> 5)&31));
}
+
+ if( MM_GetPhysAddr( (tVAddr) &gaPageNodes[PAddr] ) )
+ {
+ gaPageNodes[PAddr] = NULL;
+ // TODO: Free Node Page when fully unused
+ }
// Release spinlock
Mutex_Release( &glPhysAlloc );
return gaPageReferences[ PAddr ];
}
+int MM_SetPageNode(tPAddr PAddr, void *Node)
+{
+ tVAddr block_addr;
+
+ if( MM_GetRefCount(PAddr) == 0 ) return 1;
+
+ PAddr /= PAGE_SIZE;
+
+ block_addr = (tVAddr) &gaPageNodes[PAddr];
+ block_addr &= ~(PAGE_SIZE-1);
+
+ if( !MM_GetPhysAddr( block_addr ) )
+ {
+ if( !MM_Allocate( block_addr ) ) {
+ Log_Warning("PMem", "Unable to allocate Node page");
+ return -1;
+ }
+ memset( (void*)block_addr, 0, PAGE_SIZE );
+ }
+
+ gaPageNodes[PAddr] = Node;
+ return 0;
+}
+
+int MM_GetPageNode(tPAddr PAddr, void **Node)
+{
+ if( MM_GetRefCount(PAddr) == 0 ) {
+ return 1;
+ }
+ PAddr /= PAGE_SIZE;
+ if( !MM_GetPhysAddr( (tVAddr) &gaPageNodes[PAddr] ) ) {
+ *Node = NULL;
+ return 0;
+ }
+ *Node = gaPageNodes[PAddr];
+ return 0;
+}
+