Commenting for new function

[tpg/acess2.git] / Kernel / arch / x86 / mm_phys.c

diff --git a/Kernel/arch/x86/mm_phys.c b/Kernel/arch/x86/mm_phys.c
index bd8d60e..e4199e3 100644 (file)
--- a/Kernel/arch/x86/mm_phys.c
+++ b/Kernel/arch/x86/mm_phys.c
@@ -17,8 +17,8 @@ extern void   gKernelEnd;
 // === PROTOTYPES ===
 tPAddr MM_AllocPhys();
 tPAddr MM_AllocPhysRange(int Pages, int MaxBits);
-void   MM_RefPhys(tPAddr Addr);
-void   MM_DerefPhys(tPAddr Addr);
+void   MM_RefPhys(tPAddr PAddr);
+void   MM_DerefPhys(tPAddr PAddr);
 
 // === GLOBALS ===
 Uint64 giPhysAlloc = 0;        // Number of allocated pages
@@ -305,46 +305,48 @@ tPAddr MM_AllocPhysRange(int Pages, int MaxBits)
 }
 
 /**
- * \fn void MM_RefPhys(tPAddr Addr)
+ * \fn void MM_RefPhys(tPAddr PAddr)
  */
-void MM_RefPhys(tPAddr Addr)
+void MM_RefPhys(tPAddr PAddr)
 {
        // Get page number
-       Addr >>= 12;
+       PAddr >>= 12;
        
        // We don't care about non-ram pages
-       if(Addr >= giPageCount) return;
+       if(PAddr >= giPageCount)        return;
        
        // Lock Structures
        LOCK( &giPhysAlloc );
        
        // Reference the page
        if(gaPageReferences)
-               gaPageReferences[ Addr ] ++;
+               gaPageReferences[ PAddr ] ++;
        
        // Mark as used
-       gaPageBitmap[ Addr / 32 ] |= 1 << (Addr&31);
+       gaPageBitmap[ PAddr / 32 ] |= 1 << (PAddr&31);
        
        // Mark used block
-       if(gaPageBitmap[ Addr / 32 ] == -1)     gaSuperBitmap[Addr/1024] |= 1 << ((Addr/32)&31);
+       if(gaPageBitmap[ PAddr / 32 ] == -1)
+               gaSuperBitmap[PAddr/1024] |= 1 << ((PAddr/32)&31);
        
        // Release Spinlock
        RELEASE( &giPhysAlloc );
 }
 
 /**
- * \fn void MM_DerefPhys(Uint32 Addr)
+ * \fn void MM_DerefPhys(tPAddr PAddr)
+ * \brief Dereferences a physical page
  */
-void MM_DerefPhys(tPAddr Addr)
+void MM_DerefPhys(tPAddr PAddr)
 {
        // Get page number
-       Addr >>= 12;
+       PAddr >>= 12;
        
        // We don't care about non-ram pages
-       if(Addr >= giPageCount) return;
+       if(PAddr >= giPageCount)        return;
        
        // Check if it is freed
-       if(gaPageReferences[ Addr ] == 0) {
+       if(gaPageReferences[ PAddr ] == 0) {
                Warning("MM_DerefPhys - Non-referenced memory dereferenced");
                return;
        }
@@ -352,16 +354,19 @@ void MM_DerefPhys(tPAddr Addr)
        // Lock Structures
        LOCK( &giPhysAlloc );
        
+       if( giLastPossibleFree < PAddr )
+               giLastPossibleFree = PAddr;
+
        // Dereference
-       gaPageReferences[ Addr ] --;
+       gaPageReferences[ PAddr ] --;
        
        // Mark as free in bitmaps
-       if( gaPageReferences[ Addr ] == 0 )
+       if( gaPageReferences[ PAddr ] == 0 )
        {
-               //LOG("Freed 0x%x by %p\n", Addr<<12, __builtin_return_address(0));
-               gaPageBitmap[ Addr / 32 ] &= ~(1 << (Addr&31));
-               if(gaPageReferences[ Addr ] == 0)
-                       gaSuperBitmap[ Addr >> 10 ] &= ~(1 << ((Addr >> 5)&31));
+               //LOG("Freed 0x%x by %p\n", PAddr<<12, __builtin_return_address(0));
+               gaPageBitmap[ PAddr / 32 ] &= ~(1 << (PAddr&31));
+               if(gaPageReferences[ PAddr ] == 0)
+                       gaSuperBitmap[ PAddr >> 10 ] &= ~(1 << ((PAddr >> 5)&31));
        }
        
        // Release spinlock