/*
- * Acess2 VFS
- * - Open, Close and ChDir
+ * Acess2 Kernel VFS
+ * - By John Hodge (thePowersGang)
+ *
+ * mmap.c
+ * - VFS_MMap support
*/
#define DEBUG 0
#include <acess.h>
ENTER("pDestHint iLength xProtection xFlags xFD XOffset", DestHint, Length, Protection, Flags, FD, Offset);
+ if( Flags & MMAP_MAP_ANONYMOUS )
+ Offset = (tVAddr)DestHint & 0xFFF;
+
npages = ((Offset & (PAGE_SIZE-1)) + Length + (PAGE_SIZE - 1)) / PAGE_SIZE;
pagenum = Offset / PAGE_SIZE;
if( Flags & MMAP_MAP_ANONYMOUS )
{
size_t ofs = 0;
+ LOG("%i pages anonymous to %p", npages, mapping_dest);
for( ; npages --; mapping_dest += PAGE_SIZE, ofs += PAGE_SIZE )
{
if( MM_GetPhysAddr(mapping_dest) ) {
// TODO: Set flags to COW if needed (well, if shared)
MM_SetFlags(mapping_dest, MM_PFLAG_COW, MM_PFLAG_COW);
+ LOG("clear from %p, %i bytes", (void*)(mapping_base + ofs),
+ PAGE_SIZE - (mapping_base & (PAGE_SIZE-1))
+ );
memset( (void*)(mapping_base + ofs), 0, PAGE_SIZE - (mapping_base & (PAGE_SIZE-1)));
}
else {
+ LOG("New empty page");
// TODO: Map a COW zero page instead
if( !MM_Allocate(mapping_dest) ) {
// TODO: Error
{
if( pb->PhysAddrs[pagenum - pb->BaseOffset] == 0 )
{
- if( h->Node->MMap )
- h->Node->MMap(h->Node, pagenum*PAGE_SIZE, PAGE_SIZE, (void*)mapping_dest);
+ tVFS_NodeType *nt = h->Node->Type;
+ if( !nt )
+ {
+ // TODO: error
+ }
+ else if( nt->MMap )
+ nt->MMap(h->Node, pagenum*PAGE_SIZE, PAGE_SIZE, (void*)mapping_dest);
else
{
int read_len;
return NULL;
}
// TODO: Clip read length
- read_len = h->Node->Read(h->Node, pagenum*PAGE_SIZE, PAGE_SIZE, (void*)mapping_dest);
+ read_len = nt->Read(h->Node, pagenum*PAGE_SIZE, PAGE_SIZE, (void*)mapping_dest);
// if( read_len != PAGE_SIZE ) {
// memset( (void*)(mapping_dest+read_len), 0, PAGE_SIZE-read_len );
// }