X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=Kernel%2Farch%2Fx86%2Fmm_virt.c;h=6976c6577db0eed8f6d63290d8f8ff28ffb156a1;hb=049de1f2533477716a12a708c097b199eaa8fb6c;hp=4f272e75c1ea24901aefc8ccc47c095cdb1236db;hpb=9b7a7e725ca1b371e4a89776ac4a7bb10e2cbea7;p=tpg%2Facess2.git

diff --git a/Kernel/arch/x86/mm_virt.c b/Kernel/arch/x86/mm_virt.c
index 4f272e75..6976c657 100644
--- a/Kernel/arch/x86/mm_virt.c
+++ b/Kernel/arch/x86/mm_virt.c
@@ -10,6 +10,7 @@
  * 0xFF - System Calls / Kernel's User Code
  */
 #define DEBUG	1
+#define SANITY	1
 #include <acess.h>
 #include <mm_phys.h>
 #include <proc.h>
@@ -105,10 +106,8 @@ Uint32	gWorkerStacks[(NUM_WORKER_STACKS+31)/32];
 void MM_PreinitVirtual()
 {
 	#if USE_PAE
-	gaInitPDPT[ 0 ] = 0;
 	gaInitPageDir[ ((PAGE_TABLE_ADDR >> TAB)-3*512+3)*2 ] = ((tTabEnt)&gaInitPageDir - KERNEL_BASE) | 3;
 	#else
-	gaInitPageDir[ 0 ] = 0;
 	gaInitPageDir[ PAGE_TABLE_ADDR >> 22 ] = ((tTabEnt)&gaInitPageDir - KERNEL_BASE) | 3;
 	#endif
 	INVLPG( PAGE_TABLE_ADDR );
@@ -156,6 +155,18 @@ void MM_InstallVirtual()
 	#endif
 }
 
+/**
+ * \brief Cleans up the SMP required mappings
+ */
+void MM_FinishVirtualInit()
+{
+	#if USE_PAE
+	gaInitPDPT[ 0 ] = 0;
+	#else
+	gaInitPageDir[ 0 ] = 0;
+	#endif
+}
+
 /**
  * \fn void MM_PageFault(tVAddr Addr, Uint ErrorCode, tRegs *Regs)
  * \brief Called on a page fault
@@ -177,6 +188,7 @@ void MM_PageFault(tVAddr Addr, Uint ErrorCode, tRegs *Regs)
 		}
 		else
 		{
+			//Log("MM_PageFault: COW - MM_DuplicatePage(0x%x)", Addr);
 			paddr = MM_DuplicatePage( Addr );
 			MM_DerefPhys( gaPageTable[Addr>>12] & ~0xFFF );
 			gaPageTable[Addr>>12] &= PF_USER;
@@ -318,7 +330,7 @@ tPAddr MM_Allocate(tVAddr VAddr)
 		//LOG("paddr = 0x%llx (new table)", paddr);
 		if( paddr == 0 ) {
 			Warning("MM_Allocate - Out of Memory (Called by %p)", __builtin_return_address(0));
-			LEAVE('i',0);
+			//LEAVE('i',0);
 			return 0;
 		}
 		// Map
@@ -524,7 +536,7 @@ tPAddr MM_Clone()
 	memsetd( gaTmpDir, 0, 1024 );
 	
 	// Copy Tables
-	for(i=0;i<768;i++)
+	for( i = 0; i < 768; i ++)
 	{
 		// Check if table is allocated
 		if( !(gaPageDir[i] & PF_PRESENT) ) {
@@ -802,6 +814,8 @@ tPAddr MM_DuplicatePage(tVAddr VAddr)
 	Uint	temp;
 	 int	wasRO = 0;
 	
+	//ENTER("xVAddr", VAddr);
+	
 	// Check if mapped
 	if( !(gaPageDir  [VAddr >> 22] & PF_PRESENT) )	return 0;
 	if( !(gaPageTable[VAddr >> 12] & PF_PRESENT) )	return 0;
@@ -826,6 +840,7 @@ tPAddr MM_DuplicatePage(tVAddr VAddr)
 	if(!wasRO)	gaPageTable[VAddr >> 12] |= PF_WRITE;
 	INVLPG(VAddr);
 	
+	//LEAVE('X', ret);
 	return ret;
 }
 
@@ -880,10 +895,10 @@ void MM_FreeTemp(tVAddr VAddr)
 }
 
 /**
- * \fn tVAddr MM_MapHWPage(tPAddr PAddr, Uint Number)
+ * \fn tVAddr MM_MapHWPages(tPAddr PAddr, Uint Number)
  * \brief Allocates a contigous number of pages
  */
-tVAddr MM_MapHWPage(tPAddr PAddr, Uint Number)
+tVAddr MM_MapHWPages(tPAddr PAddr, Uint Number)
 {
 	 int	i, j;
 	
@@ -947,7 +962,7 @@ tVAddr MM_AllocDMA(int Pages, int MaxBits, tPAddr *PhysAddr)
 	{
 		phys = MM_AllocPhys();
 		*PhysAddr = phys;
-		ret = MM_MapHWPage(phys, 1);
+		ret = MM_MapHWPages(phys, 1);
 		if(ret == 0) {
 			MM_DerefPhys(phys);
 			LEAVE('i', 0);
@@ -958,24 +973,15 @@ tVAddr MM_AllocDMA(int Pages, int MaxBits, tPAddr *PhysAddr)
 	}
 	
 	// Slow Allocate
-	phys = MM_AllocPhysRange(Pages);
+	phys = MM_AllocPhysRange(Pages, MaxBits);
 	// - Was it allocated?
 	if(phys == 0) {
 		LEAVE('i', 0);
 		return 0;
 	}
-	// - Check if the memory is OK
-	if(phys + (Pages-1)*0x1000 > maxCheck)
-	{
-		// Deallocate and return 0
-		for(;Pages--;phys+=0x1000)
-			MM_DerefPhys(phys);
-		LEAVE('i', 0);
-		return 0;
-	}
 	
 	// Allocated successfully, now map
-	ret = MM_MapHWPage(phys, Pages);
+	ret = MM_MapHWPages(phys, Pages);
 	if( ret == 0 ) {
 		// If it didn't map, free then return 0
 		for(;Pages--;phys+=0x1000)
@@ -990,10 +996,10 @@ tVAddr MM_AllocDMA(int Pages, int MaxBits, tPAddr *PhysAddr)
 }
 
 /**
- * \fn void MM_UnmapHWPage(tVAddr VAddr, Uint Number)
+ * \fn void MM_UnmapHWPages(tVAddr VAddr, Uint Number)
  * \brief Unmap a hardware page
  */
-void MM_UnmapHWPage(tVAddr VAddr, Uint Number)
+void MM_UnmapHWPages(tVAddr VAddr, Uint Number)
 {
 	 int	i, j;
 	// Sanity Check
@@ -1016,6 +1022,6 @@ void MM_UnmapHWPage(tVAddr VAddr, Uint Number)
 EXPORT(MM_GetPhysAddr);
 EXPORT(MM_Map);
 //EXPORT(MM_Unmap);
-EXPORT(MM_MapHWPage);
+EXPORT(MM_MapHWPages);
 EXPORT(MM_AllocDMA);
-EXPORT(MM_UnmapHWPage);
+EXPORT(MM_UnmapHWPages);