void MM_PageFault(tVAddr Addr, Uint ErrorCode, tRegs *Regs);
void MM_DumpTables_Print(tVAddr Start, Uint32 Orig, size_t Size, void *Node);
//void MM_DumpTables(tVAddr Start, tVAddr End);
+tPAddr MM_GetPageFromAS(tProcess *Process, volatile const void *Addr);
//void MM_ClearUser(void);
tPAddr MM_DuplicatePage(tVAddr VAddr);
return (gaPageTable[addr >> 12] & ~0xFFF) | (addr & 0xFFF);
}
+/**
+ * \brief Get the address of a page from another addres space
+ * \return Refenced physical address (or 0 on error)
+ */
+tPAddr MM_GetPageFromAS(tProcess *Process, volatile const void *Addr)
+{
+ tPAddr ret = 0;
+ GET_TEMP_MAPPING(Process->MemState.CR3);
+ tVAddr addr = (tVAddr)Addr;
+ if( (gaTmpDir[addr >> 22] & 1) && (gaTmpTable[addr >> 12] & 1) ) {
+ ret = (gaTmpTable[addr >> 12] & ~0xFFF) | (addr & 0xFFF);
+ MM_RefPhys( ret );
+ }
+ REL_TEMP_MAPPING();
+ return ret;
+}
+
/**
* \fn void MM_SetCR3(Uint CR3)
* \brief Sets the current process space
*/
void MM_ClearUser(void)
{
- Uint i, j;
-
- for( i = 0; i < (MM_USER_MAX>>22); i ++ )
+ ASSERTC(MM_PPD_MIN, ==, MM_USER_MAX);
+ for( unsigned int i = 0; i < (MM_USER_MAX>>22); i ++ )
{
// Check if directory is not allocated
if( !(gaPageDir[i] & PF_PRESENT) ) {
gaPageDir[i] = 0;
continue;
}
-
+
// Deallocate tables
- for( j = 0; j < 1024; j ++ )
+ for( unsigned int j = 0; j < 1024; j ++ )
{
if( gaPageTable[i*1024+j] & 1 )
MM_DerefPhys( gaPageTable[i*1024+j] & ~0xFFF );
*/
void MM_ClearSpace(Uint32 CR3)
{
- int i, j;
-
if(CR3 == (*gpPageCR3 & ~0xFFF)) {
Log_Error("MMVirt", "Can't clear current address space");
return ;
GET_TEMP_MAPPING(CR3);
INVLPG( gaTmpDir );
- for( i = 0; i < 1024; i ++ )
+ for( int i = 0; i < 1024; i ++ )
{
Uint32 *table = &gaTmpTable[i*1024];
if( !(gaTmpDir[i] & PF_PRESENT) )
if( i < 768 || (i > MM_KERNEL_STACKS >> 22 && i < MM_KERNEL_STACKS_END >> 22) )
{
- for( j = 0; j < 1024; j ++ )
+ for( int j = 0; j < 1024; j ++ )
{
if( !(table[j] & 1) )
continue;
LOG("%i: %x", i, *pte);
// Check if page used
if(*pte & 1) continue;
+ MM_RefPhys( PAddr );
+
// Mark as used
*pte = PAddr | 3;
INVLPG( TEMP_MAP_ADDR + (i << 12) );
return NULL;
}
+void *MM_MapTempFromProc(tProcess *Process, const void *VAddr)
+{
+ // Get paddr
+ tPAddr paddr = MM_GetPageFromAS(Process, VAddr);
+ if( paddr == 0 )
+ return NULL;
+ return MM_MapTemp(paddr);
+}
+
/**
* \fn void MM_FreeTemp(tVAddr PAddr)
* \brief Free's a temp mapping
int i = (tVAddr)VAddr >> 12;
//ENTER("xVAddr", VAddr);
- if(i >= (TEMP_MAP_ADDR >> 12)) {
+ if(i >= (TEMP_MAP_ADDR >> 12))
+ {
+ MM_DerefPhys( gaPageTable[i] & ~0xFFF );
gaPageTable[ i ] = 0;
Semaphore_Signal(&gTempMappingsSem, 1);
}