+int VFS_MMap_MapPage(tVFS_Node *Node, unsigned int pagenum, tVFS_MMapPageBlock *pb, void *mapping_dest, unsigned int Protection)
+{
+ if( pb->PhysAddrs[pagenum - pb->BaseOffset] != 0 )
+ {
+ MM_Map( mapping_dest, pb->PhysAddrs[pagenum - pb->BaseOffset] );
+ MM_RefPhys( pb->PhysAddrs[pagenum - pb->BaseOffset] );
+ LOG("Cached map %X to %p (%P)", pagenum*PAGE_SIZE, mapping_dest,
+ pb->PhysAddrs[pagenum - pb->BaseOffset]);
+ }
+ else
+ {
+ tVFS_NodeType *nt = Node->Type;
+ if( !nt )
+ {
+ // TODO: error
+ }
+ else if( nt->MMap )
+ nt->MMap(Node, pagenum*PAGE_SIZE, PAGE_SIZE, mapping_dest);
+ else
+ {
+ int read_len;
+ // Allocate pages and read data
+ if( MM_Allocate(mapping_dest) == 0 ) {
+ // TODO: Unwrap
+ return 1;
+ }
+ // TODO: Clip read length
+ read_len = nt->Read(Node, pagenum*PAGE_SIZE, PAGE_SIZE, mapping_dest, 0);
+ // TODO: This was commented out, why?
+ if( read_len != PAGE_SIZE ) {
+ memset( (char*)mapping_dest + read_len, 0, PAGE_SIZE-read_len );
+ }
+ }
+ pb->PhysAddrs[pagenum - pb->BaseOffset] = MM_GetPhysAddr( mapping_dest );
+ MM_SetPageNode( pb->PhysAddrs[pagenum - pb->BaseOffset], Node );
+ MM_RefPhys( pb->PhysAddrs[pagenum - pb->BaseOffset] );
+ LOG("Read and map %X to %p (%P)", pagenum*PAGE_SIZE, mapping_dest,
+ pb->PhysAddrs[pagenum - pb->BaseOffset]);
+ }
+ // TODO: Huh?
+ Node->ReferenceCount ++;
+
+ // Set flags
+ if( !(Protection & MMAP_PROT_WRITE) ) {
+ MM_SetFlags(mapping_dest, MM_PFLAG_RO, MM_PFLAG_RO);
+ }
+ else {
+ MM_SetFlags(mapping_dest, 0, MM_PFLAG_RO);
+ }
+
+ if( Protection & MMAP_PROT_EXEC ) {
+ MM_SetFlags(mapping_dest, MM_PFLAG_EXEC, MM_PFLAG_EXEC);
+ }
+ else {
+ MM_SetFlags(mapping_dest, 0, MM_PFLAG_EXEC);
+ }
+
+ return 0;
+}
+