-"/*
+/*
* Acess2
* - Physical memory manager
*/
//#define USE_STACK 1
#define TRACE_ALLOCS 0 // Print trace messages on AllocPhys/DerefPhys
-#define REFERENCE_BASE 0xE0400000
// === IMPORTS ===
extern void gKernelEnd;
+extern void Proc_PrintBacktrace(void);
// === PROTOTYPES ===
void MM_Install(tMBoot_Info *MBoot);
Uint32 gaSuperBitmap[1024]; // Blocks of 1024 Pages
Uint32 gaPageBitmap[1024*1024/32]; // Individual pages
-Uint32 *gaPageReferences;
+ int *gaPageReferences;
+void **gaPageNodes = (void*)MM_PAGENODE_BASE;
+#define REFENT_PER_PAGE (0x1000/sizeof(gaPageReferences[0]))
// === CODE ===
void MM_Install(tMBoot_Info *MBoot)
while(num--)
MM_RefPhys( (mods[i].Start & ~0xFFF) + (num<<12) );
}
-
- // Allocate References
- //LOG("Reference Pages %i", (giPageCount*4+0xFFF)>>12);
- for(num = 0; num < (giPageCount*4+0xFFF)>>12; num++)
- {
- if( !MM_Allocate( REFERENCE_BASE + (num<<12) ) )
- {
- Panic("Oh, ****, no space for the reference pages, that's bad");
- for(;;);
- }
- }
-
- //LOG("Filling");
- // Fill references
- gaPageReferences = (void*)REFERENCE_BASE;
- memsetd(gaPageReferences, 1, kernelPages);
- for( num = kernelPages; num < giPageCount; num++ )
- {
- gaPageReferences[num] = (gaPageBitmap[ num / 32 ] >> (num&31)) & 1;
- }
+
+ gaPageReferences = (void*)MM_REFCOUNT_BASE;
+
+ Log_Log("PMem", "Physical memory set up");
}
/**
int first, last;
for( i = numAddrClasses; i -- > 1; )
{
-// Log("Scanning %i (%i bits)", i, addrClasses[i]);
first = 1 << (addrClasses[i-1] - 12);
last = (1 << (addrClasses[i] - 12)) - 1;
// Range is above the last free page
if( last > giLastPossibleFree )
last = giLastPossibleFree;
-// Log(" first=%i,max=%i", first, last);
// Scan the range
for( indx = first; indx < last; )
{
-// Log("indx = %i (< %i?)", indx, last);
if( gaSuperBitmap[indx>>10] == -1 ) {
indx += 1024;
continue;
}
// Out of memory?
if( i <= 1 ) indx = -1;
-// Log("indx = %i", indx);
}
#elif 0
// Find free page
}
// Mark page used
- if(gaPageReferences)
- gaPageReferences[ indx ] = 1;
+ if( MM_GetPhysAddr( (tVAddr)&gaPageReferences[indx] ) )
+ gaPageReferences[indx] = 1;
gaPageBitmap[ indx>>5 ] |= 1 << (indx&31);
giPhysAlloc ++;
LEAVE('X', ret);
#if TRACE_ALLOCS
- Log_Debug("PMem", "MM_AllocPhys: RETURN 0x%llx (%i free)", ret, giPageCount-giPhysAlloc);
+ if( now() > 4000 ) {
+ Log_Debug("PMem", "MM_AllocPhys: RETURN %P (%i free)", ret, giPageCount-giPhysAlloc);
+ Proc_PrintBacktrace();
+ }
#endif
return ret;
}
// Mark pages used
for( i = 0; i < Pages; i++ )
{
- if(gaPageReferences)
+ if( MM_GetPhysAddr( (tVAddr)&gaPageReferences[idx*32+sidx] ) )
gaPageReferences[idx*32+sidx] = 1;
gaPageBitmap[ idx ] |= 1 << sidx;
sidx ++;
{
// Get page number
PAddr >>= 12;
-
+
// We don't care about non-ram pages
if(PAddr >= giPageCount) return;
Mutex_Acquire( &glPhysAlloc );
// Reference the page
- if(gaPageReferences)
+ if( gaPageReferences )
+ {
+ if( MM_GetPhysAddr( (tVAddr)&gaPageReferences[PAddr] ) == 0 )
+ {
+ int i, base;
+ tVAddr addr = ((tVAddr)&gaPageReferences[PAddr]) & ~0xFFF;
+// Log_Debug("PMem", "MM_RefPhys: Allocating info for %X", PAddr);
+ Mutex_Release( &glPhysAlloc );
+ if( MM_Allocate( addr ) == 0 ) {
+ Log_KernelPanic("PMem", "MM_RefPhys: Out of physical memory allocating info for %X", PAddr*PAGE_SIZE);
+ }
+ Mutex_Acquire( &glPhysAlloc );
+
+ base = PAddr & ~(1024-1);
+ for( i = 0; i < 1024; i ++ ) {
+ gaPageReferences[base + i] = (gaPageBitmap[(base+i)/32] & (1 << (base+i)%32)) ? 1 : 0;
+ }
+ }
gaPageReferences[ PAddr ] ++;
+ }
// Mark as used
gaPageBitmap[ PAddr / 32 ] |= 1 << (PAddr&31);
{
// Get page number
PAddr >>= 12;
-
+
// We don't care about non-ram pages
if(PAddr >= giPageCount) return;
// Check if it is freed
- if(gaPageReferences[ PAddr ] == 0) {
- Warning("MM_DerefPhys - Non-referenced memory dereferenced");
+ if( !(gaPageBitmap[PAddr / 32] & (1 << PAddr%32)) ) {
+ Log_Warning("MMVirt", "MM_DerefPhys - Non-referenced memory dereferenced");
return;
}
giLastPossibleFree = PAddr;
// Dereference
- gaPageReferences[ PAddr ] --;
-
- // Mark as free in bitmaps
- if( gaPageReferences[ PAddr ] == 0 )
+ if( !MM_GetPhysAddr( (tVAddr)&gaPageReferences[PAddr] ) || (-- gaPageReferences[PAddr]) == 0 )
{
#if TRACE_ALLOCS
- Log_Debug("PMem", "MM_DerefPhys: Free'd 0x%x (%i free)", PAddr, giPageCount-giPhysAlloc);
+ Log_Debug("PMem", "MM_DerefPhys: Free'd %P (%i free)", PAddr<<12, giPageCount-giPhysAlloc);
+ Proc_PrintBacktrace();
#endif
//LOG("Freed 0x%x by %p\n", PAddr<<12, __builtin_return_address(0));
giPhysAlloc --;
gaPageBitmap[ PAddr / 32 ] &= ~(1 << (PAddr&31));
- if(gaPageReferences[ PAddr ] == 0)
+ if(gaPageBitmap[ PAddr / 32 ] == 0)
gaSuperBitmap[ PAddr >> 10 ] &= ~(1 << ((PAddr >> 5)&31));
+
+ if( MM_GetPhysAddr( (tVAddr) &gaPageNodes[PAddr] ) )
+ {
+ gaPageNodes[PAddr] = NULL;
+ // TODO: Free Node Page when fully unused
+ }
}
-
+
// Release spinlock
Mutex_Release( &glPhysAlloc );
}
// We don't care about non-ram pages
if(PAddr >= giPageCount) return -1;
+
+ if( MM_GetPhysAddr( (tVAddr)&gaPageReferences[PAddr] ) == 0 )
+ return (gaPageBitmap[PAddr / 32] & (1 << PAddr%32)) ? 1 : 0;
// Check if it is freed
return gaPageReferences[ PAddr ];
}
+
+int MM_SetPageNode(tPAddr PAddr, void *Node)
+{
+ tVAddr block_addr;
+
+ if( MM_GetRefCount(PAddr) == 0 ) return 1;
+
+ PAddr /= PAGE_SIZE;
+
+ block_addr = (tVAddr) &gaPageNodes[PAddr];
+ block_addr &= ~(PAGE_SIZE-1);
+
+ if( !MM_GetPhysAddr( block_addr ) )
+ {
+ if( !MM_Allocate( block_addr ) ) {
+ Log_Warning("PMem", "Unable to allocate Node page");
+ return -1;
+ }
+ memset( (void*)block_addr, 0, PAGE_SIZE );
+ }
+
+ gaPageNodes[PAddr] = Node;
+// Log("gaPageNodes[0x%x] = %p", PAddr, Node);
+ return 0;
+}
+
+int MM_GetPageNode(tPAddr PAddr, void **Node)
+{
+ if( MM_GetRefCount(PAddr) == 0 ) return 1;
+
+ PAddr /= PAGE_SIZE;
+ if( !MM_GetPhysAddr( (tVAddr) &gaPageNodes[PAddr] ) ) {
+ *Node = NULL;
+ return 0;
+ }
+ *Node = gaPageNodes[PAddr];
+ return 0;
+}
+
git.ucc.asn.au / tpg / acess2.git / blobdiff
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