};
// === IMPORTS ===
-extern void gKernelBase;
-extern void gKernelEnd;
+extern char gKernelBase[];
+extern char gKernelEnd[];
// === PROTOTYPES ===
void MM_InitPhys_Multiboot(tMBoot_Info *MBoot);
-tPAddr MM_AllocPhysRange(int Num, int Bits);
-tPAddr MM_AllocPhys(void);
-void MM_RefPhys(tPAddr PAddr);
-void MM_DerefPhys(tPAddr PAddr);
+//tPAddr MM_AllocPhysRange(int Num, int Bits);
+//tPAddr MM_AllocPhys(void);
+//void MM_RefPhys(tPAddr PAddr);
+//void MM_DerefPhys(tPAddr PAddr);
int MM_int_GetRangeID( tPAddr Addr );
// === GLOBALS ===
-tSpinlock glPhysicalPages;
-Uint64 *gaSuperBitmap; // 1 bit = 64 Pages, 16 MiB Per Word
-Uint64 *gaMainBitmap; // 1 bit = 1 Page, 256 KiB per Word
-Uint64 *gaMultiBitmap; // Each bit means that the page is being used multiple times
+tMutex glPhysicalPages;
+Uint64 *gaSuperBitmap = (void*)MM_PAGE_SUPBMP; // 1 bit = 64 Pages, 16 MiB Per Word
+Uint64 *gaMainBitmap = (void*)MM_PAGE_BITMAP; // 1 bit = 1 Page, 256 KiB per Word
+Uint64 *gaMultiBitmap = (void*)MM_PAGE_DBLBMP; // Each bit means that the page is being used multiple times
Uint32 *gaiPageReferences = (void*)MM_PAGE_COUNTS; // Reference Counts
tPAddr giFirstFreePage; // First possibly free page
Uint64 giPhysRangeFree[NUM_MM_PHYS_RANGES]; // Number of free pages in each range
LOG("Clearing multi bitmap");
// Fill the bitmaps
- memset(gaMultiBitmap, 0, numPages<<12);
+ memset(gaMultiBitmap, 0, (numPages<<12)/8);
// - initialise to one, then clear the avaliable areas
- memset(gaMainBitmap, -1, numPages<<12);
+ memset(gaMainBitmap, -1, (numPages<<12)/8);
+ memset(gaSuperBitmap, -1, (numPages<<12)/(8*64));
LOG("Setting main bitmap");
// - Clear all Type=1 areas
LOG("Clearing valid regions");
size = ent->Size >> 12;
if(base & 63) {
- Uint64 val = -1L << (base & 63);
+ Uint64 val = -1LL << (base & 63);
gaMainBitmap[base / 64] &= ~val;
size -= (base & 63);
base += 64 - (base & 63);
}
memset( &gaMainBitmap[base / 64], 0, size/8 );
if( size & 7 ) {
- Uint64 val = -1L << (size & 7);
+ Uint64 val = -1LL << (size & 7);
val <<= (size/8)&7;
gaMainBitmap[base / 64] &= ~val;
}
size = (size + (base & 63) + 63) >> 6;
base = base >> 6;
if(base & 63) {
- Uint64 val = -1L << (base & 63);
+ Uint64 val = -1LL << (base & 63);
gaSuperBitmap[base / 64] &= ~val;
size -= (base & 63);
base += 64 - (base & 63);
size = firstFreePage >> 12;
memset( &gaMainBitmap[base / 64], -1, size/8 );
if( size & 7 ) {
- Uint64 val = -1L << (size & 7);
+ Uint64 val = -1LL << (size & 7);
val <<= (size/8)&7;
gaMainBitmap[base / 64] |= val;
}
if(gaiStaticAllocPages[i] != 0)
continue;
gaMainBitmap[ gaiStaticAllocPages[i] >> (12+6) ]
- &= ~(1L << ((gaiStaticAllocPages[i]>>12)&63));
+ &= ~(1LL << ((gaiStaticAllocPages[i]>>12)&63));
}
// Fill the super bitmap
for( base = 0; base < (size+63)/64; base ++)
{
if( gaMainBitmap[ base ] + 1 == 0 )
- gaSuperBitmap[ base/64 ] |= 1L << (base&63);
+ gaSuperBitmap[ base/64 ] |= 1LL << (base&63);
}
// Set free page counts
{
int rangeID;
// Skip allocated
- if( gaMainBitmap[ base >> 6 ] & (1L << (base&63)) ) continue;
+ if( gaMainBitmap[ base >> 6 ] & (1LL << (base&63)) ) continue;
// Get range ID
rangeID = MM_int_GetRangeID( base << 12 );
/**
* \brief Allocate a contiguous range of physical pages with a maximum
- * bit size of \a Bits
- * \param Num Number of pages to allocate
- * \param Bits Maximum size of the physical address
- * \note If \a Bits is <= 0, any sized address is used (with preference
+ * bit size of \a MaxBits
+ * \param Pages Number of pages to allocate
+ * \param MaxBits Maximum size of the physical address
+ * \note If \a MaxBits is <= 0, any sized address is used (with preference
* to higher addresses)
*/
-tPAddr MM_AllocPhysRange(int Num, int Bits)
+tPAddr MM_AllocPhysRange(int Pages, int MaxBits)
{
tPAddr addr, ret;
int rangeID;
int nFree = 0, i;
- ENTER("iNum iBits", Num, Bits);
+ ENTER("iPages iBits", Pages, MaxBits);
- if( Bits <= 0 || Bits >= 64 ) // Speedup for the common case
+ if( MaxBits <= 0 || MaxBits >= 64 ) // Speedup for the common case
rangeID = MM_PHYS_MAX;
else
- rangeID = MM_int_GetRangeID( (1L << Bits) - 1 );
+ rangeID = MM_int_GetRangeID( (1LL << MaxBits) - 1 );
LOG("rangeID = %i", rangeID);
- LOCK(&glPhysicalPages);
+ Mutex_Acquire(&glPhysicalPages);
// Check if the range actually has any free pages
while(giPhysRangeFree[rangeID] == 0 && rangeID)
// What the? Oh, man. No free pages
if(giPhysRangeFree[rangeID] == 0) {
- RELEASE(&glPhysicalPages);
+ Mutex_Release(&glPhysicalPages);
// TODO: Page out
// ATM. Just Warning
Warning(" MM_AllocPhysRange: Out of free pages");
Log_Warning("Arch",
"Out of memory (unable to fulfil request for %i pages), zero remaining",
- Num
+ Pages
);
LEAVE('i', 0);
return 0;
}
// Check if there is enough in the range
- if(giPhysRangeFree[rangeID] >= Num)
+ if(giPhysRangeFree[rangeID] >= Pages)
{
LOG("{%i,0x%x -> 0x%x}",
giPhysRangeFree[rangeID],
if( gaSuperBitmap[addr >> (6+6)] + 1 == 0 ) {
LOG("nFree = %i = 0 (super) (0x%x)", nFree, addr);
nFree = 0;
- addr += 1L << (6+6);
- addr &= ~0xFFF; // (1L << 6+6) - 1
+ addr += 1LL << (6+6);
+ addr &= ~0xFFF; // (1LL << 6+6) - 1
continue;
}
// Check page block (64 pages)
if( gaMainBitmap[addr >> 6] + 1 == 0) {
LOG("nFree = %i = 0 (main) (0x%x)", nFree, addr);
nFree = 0;
- addr += 1L << (6);
+ addr += 1LL << (6);
addr &= ~0x3F;
continue;
}
// Check individual page
- if( gaMainBitmap[addr >> 6] & (1L << (addr & 63)) ) {
+ if( gaMainBitmap[addr >> 6] & (1LL << (addr & 63)) ) {
LOG("nFree = %i = 0 (page) (0x%x)", nFree, addr);
nFree = 0;
addr ++;
}
nFree ++;
addr ++;
- LOG("nFree(%i) == %i (0x%x)", nFree, Num, addr);
- if(nFree == Num)
+ LOG("nFree(%i) == %i (0x%x)", nFree, Pages, addr);
+ if(nFree == Pages)
break;
}
LOG("nFree = %i", nFree);
// If we don't find a contiguous block, nFree will not be equal
// to Num, so we set it to zero and do the expensive lookup.
- if(nFree != Num) nFree = 0;
+ if(nFree != Pages) nFree = 0;
}
if( !nFree )
nFree = 1;
addr = giPhysRangeLast[ rangeID ];
// TODO
- RELEASE(&glPhysicalPages);
+ Mutex_Release(&glPhysicalPages);
// TODO: Page out
// ATM. Just Warning
- Warning(" MM_AllocPhysRange: Out of memory (unable to fulfil request for %i pages)", Num);
+ Warning(" MM_AllocPhysRange: Out of memory (unable to fulfil request for %i pages)", Pages);
Log_Warning("Arch",
"Out of memory (unable to fulfil request for %i pages)",
- Num
+ Pages
);
LEAVE('i', 0);
return 0;
LOG("nFree = %i, addr = 0x%08x", nFree, addr);
// Mark pages as allocated
- addr -= Num;
- for( i = 0; i < Num; i++, addr++ )
+ addr -= Pages;
+ for( i = 0; i < Pages; i++, addr++ )
{
- gaMainBitmap[addr >> 6] |= 1L << (addr & 63);
+ gaMainBitmap[addr >> 6] |= 1LL << (addr & 63);
rangeID = MM_int_GetRangeID(addr << 12);
giPhysRangeFree[ rangeID ] --;
LOG("%x == %x", addr, giPhysRangeFirst[ rangeID ]);
ret = addr; // Save the return address
// Update super bitmap
- Num += addr & (64-1);
+ Pages += addr & (64-1);
addr &= ~(64-1);
- Num = (Num + (64-1)) & ~(64-1);
- for( i = 0; i < Num/64; i++ )
+ Pages = (Pages + (64-1)) & ~(64-1);
+ for( i = 0; i < Pages/64; i++ )
{
if( gaMainBitmap[ addr >> 6 ] + 1 == 0 )
- gaSuperBitmap[addr>>12] |= 1L << ((addr >> 6) & 63);
+ gaSuperBitmap[addr>>12] |= 1LL << ((addr >> 6) & 63);
}
- RELEASE(&glPhysicalPages);
+ Mutex_Release(&glPhysicalPages);
LEAVE('x', ret << 12);
return ret << 12;
}
if( PAddr >> 12 > giMaxPhysPage ) return ;
- if( gaMainBitmap[ page >> 6 ] & (1L << (page&63)) )
+ if( gaMainBitmap[ page >> 6 ] & (1LL << (page&63)) )
{
// Reference again
- gaMultiBitmap[ page >> 6 ] |= 1L << (page&63);
+ gaMultiBitmap[ page >> 6 ] |= 1LL << (page&63);
gaiPageReferences[ page ] ++;
}
else
{
// Allocate
- gaMainBitmap[page >> 6] |= 1L << (page&63);
+ gaMainBitmap[page >> 6] |= 1LL << (page&63);
if( gaMainBitmap[page >> 6 ] + 1 == 0 )
- gaSuperBitmap[page>> 12] |= 1L << ((page >> 6) & 63);
+ gaSuperBitmap[page>> 12] |= 1LL << ((page >> 6) & 63);
}
}
if( PAddr >> 12 > giMaxPhysPage ) return ;
- if( gaMultiBitmap[ page >> 6 ] & (1L << (page&63)) ) {
+ if( gaMultiBitmap[ page >> 6 ] & (1LL << (page&63)) ) {
gaiPageReferences[ page ] --;
if( gaiPageReferences[ page ] == 1 )
- gaMultiBitmap[ page >> 6 ] &= ~(1L << (page&63));
+ gaMultiBitmap[ page >> 6 ] &= ~(1LL << (page&63));
if( gaiPageReferences[ page ] == 0 )
- gaMainBitmap[ page >> 6 ] &= ~(1L << (page&63));
+ gaMainBitmap[ page >> 6 ] &= ~(1LL << (page&63));
}
else
- gaMainBitmap[ page >> 6 ] &= ~(1L << (page&63));
+ gaMainBitmap[ page >> 6 ] &= ~(1LL << (page&63));
// Update the free counts if the page was freed
- if( !(gaMainBitmap[ page >> 6 ] & (1L << (page&63))) )
+ if( !(gaMainBitmap[ page >> 6 ] & (1LL << (page&63))) )
{
int rangeID;
rangeID = MM_int_GetRangeID( PAddr );
// If the bitmap entry is not -1, unset the bit in the super bitmap
if(gaMainBitmap[ page >> 6 ] + 1 != 0 ) {
- gaSuperBitmap[page >> 12] &= ~(1L << ((page >> 6) & 63));
+ gaSuperBitmap[page >> 12] &= ~(1LL << ((page >> 6) & 63));
}
}