return (gaPageTable[Addr >> 12] & ~0xFFF) | (Addr & 0xFFF);
}
-
-/**
- * \fn int MM_IsUser(tVAddr VAddr)
- * \brief Checks if a page is user accessable
- */
-int MM_IsUser(tVAddr VAddr)
-{
- if( !(gaPageDir[VAddr >> 22] & 1) )
- return 0;
- if( !(gaPageTable[VAddr >> 12] & 1) )
- return 0;
- if( !(gaPageTable[VAddr >> 12] & PF_USER) )
- return 0;
- return 1;
-}
-
/**
* \fn void MM_SetCR3(Uint CR3)
* \brief Sets the current process space
// *ent, VAddr >> 22, gaPageDir[VAddr >> 22]);
}
+/**
+ * \brief Get the flags on a page
+ */
+Uint MM_GetFlags(tVAddr VAddr)
+{
+ tTabEnt *ent;
+ Uint ret = 0;
+
+ // Validity Check
+ if( !(gaPageDir[VAddr >> 22] & 1) ) return 0;
+ if( !(gaPageTable[VAddr >> 12] & 1) ) return 0;
+
+ ent = &gaPageTable[VAddr >> 12];
+
+ // Read-Only
+ if( !(*ent & PF_WRITE) ) ret |= MM_PFLAG_RO;
+ // Kernel
+ if( !(*ent & PF_USER) ) ret |= MM_PFLAG_KERNEL;
+ // Copy-On-Write
+ if( *ent & PF_COW ) ret |= MM_PFLAG_COW;
+
+ return ret;
+}
+
/**
* \fn tPAddr MM_DuplicatePage(tVAddr VAddr)
* \brief Duplicates a virtual page to a physical one