*
* Physical Memory Manager
*/
-#define DEBUG 0
+#define DEBUG 1
#include <acess.h>
#include <mboot.h>
#include <mm_virt.h>
size = ent->Size >> 12;
if(base & 63) {
- Uint64 val = -1 << (base & 63);
+ Uint64 val = -1L << (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 = -1 << (size & 7);
+ Uint64 val = -1L << (size & 7);
val <<= (size/8)&7;
gaMainBitmap[base / 64] &= ~val;
}
size = (size + (base & 63) + 63) >> 6;
base = base >> 6;
if(base & 63) {
- Uint64 val = -1 << (base & 63);
+ Uint64 val = -1L << (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 = -1 << (size & 7);
+ Uint64 val = -1L << (size & 7);
val <<= (size/8)&7;
gaMainBitmap[base / 64] |= val;
}
if(gaiStaticAllocPages[i] != 0)
continue;
gaMainBitmap[ gaiStaticAllocPages[i] >> (12+6) ]
- &= ~(1 << ((gaiStaticAllocPages[i]>>12)&63));
+ &= ~(1L << ((gaiStaticAllocPages[i]>>12)&63));
}
// Fill the super bitmap
memset(gaSuperBitmap, 0, superPages<<12);
for( base = 0; base < (size+63)/64; base ++)
{
- if( gaMainBitmap[ base ] == -1 )
- gaSuperBitmap[ base/64 ] |= 1 << (base&63);
+ if( gaMainBitmap[ base ] + 1 == 0 )
+ gaSuperBitmap[ base/64 ] |= 1L << (base&63);
}
// Set free page counts
{
int rangeID;
// Skip allocated
- if( gaMainBitmap[ base >> 6 ] & (1 << (base&63)) ) continue;
+ if( gaMainBitmap[ base >> 6 ] & (1L << (base&63)) ) continue;
// Get range ID
rangeID = MM_int_GetRangeID( base << 12 );
*/
tPAddr MM_AllocPhysRange(int Num, int Bits)
{
- tPAddr addr;
+ tPAddr addr, ret;
int rangeID;
int nFree = 0, i;
if( Bits <= 0 || Bits >= 64 ) // Speedup for the common case
rangeID = MM_PHYS_MAX;
else
- rangeID = MM_int_GetRangeID( (1 << Bits) -1 );
+ rangeID = MM_int_GetRangeID( (1L << Bits) - 1 );
LOG("rangeID = %i", rangeID);
{
//Log(" MM_AllocPhysRange: addr = 0x%x", addr);
// Check the super bitmap
- if( gaSuperBitmap[addr >> (6+6)] == -1 ) {
+ if( gaSuperBitmap[addr >> (6+6)] + 1 == 0 ) {
LOG("nFree = %i = 0 (super) (0x%x)", nFree, addr);
nFree = 0;
- addr += 1 << (6+6);
- addr &= (1 << (6+6)) - 1;
+ addr += 1L << (6+6);
+ addr &= ~0xFFF; // (1L << 6+6) - 1
continue;
}
// Check page block (64 pages)
- if( gaSuperBitmap[addr >> (6+6)] & (1 << (addr>>6)&63)) {
+ if( gaMainBitmap[addr >> 6] + 1 == 0) {
LOG("nFree = %i = 0 (main) (0x%x)", nFree, addr);
nFree = 0;
- addr += 1 << (12+6);
- addr &= (1 << (12+6)) - 1;
+ addr += 1L << (6);
+ addr &= ~0x3F;
continue;
}
// Check individual page
- if( gaMainBitmap[addr >> 6] & (1 << (addr & 63)) ) {
+ if( gaMainBitmap[addr >> 6] & (1L << (addr & 63)) ) {
LOG("nFree = %i = 0 (page) (0x%x)", nFree, addr);
nFree = 0;
addr ++;
// Mark pages as allocated
addr -= Num;
- for( i = 0; i < Num; i++ )
+ for( i = 0; i < Num; i++, addr++ )
{
- gaMainBitmap[addr >> 6] |= 1 << (addr & 63);
- rangeID = MM_int_GetRangeID(addr);
+ gaMainBitmap[addr >> 6] |= 1L << (addr & 63);
+ rangeID = MM_int_GetRangeID(addr << 12);
giPhysRangeFree[ rangeID ] --;
+ LOG("%x == %x", addr, giPhysRangeFirst[ rangeID ]);
+ if(addr == giPhysRangeFirst[ rangeID ])
+ giPhysRangeFirst[ rangeID ] += 1;
}
+ ret = addr; // Save the return address
// Update super bitmap
Num += addr & (64-1);
Num = (Num + (64-1)) & ~(64-1);
for( i = 0; i < Num/64; i++ )
{
- if( gaMainBitmap[ addr >> 6 ] == -1 )
- gaSuperBitmap[addr>>12] |= 1 << ((addr >> 6) & 64);
+ if( gaMainBitmap[ addr >> 6 ] + 1 == 0 )
+ gaSuperBitmap[addr>>12] |= 1L << ((addr >> 6) & 63);
}
RELEASE(&glPhysicalPages);
- LEAVE('x', addr << 12);
- return addr << 12;
+ LEAVE('x', ret << 12);
+ return ret << 12;
}
/**
if( PAddr >> 12 > giMaxPhysPage ) return ;
- if( gaMainBitmap[ page >> 6 ] & (1 << (page&63)) )
+ if( gaMainBitmap[ page >> 6 ] & (1L << (page&63)) )
{
// Reference again
- gaMultiBitmap[ page >> 6 ] |= 1 << (page&63);
+ gaMultiBitmap[ page >> 6 ] |= 1L << (page&63);
gaiPageReferences[ page ] ++;
}
else
{
// Allocate
- gaMainBitmap[page >> 6] |= 1 << (page&63);
- if( gaMainBitmap[page >> 6 ] == -1 )
- gaSuperBitmap[page>> 12] |= 1 << ((page >> 6) & 63);
+ gaMainBitmap[page >> 6] |= 1L << (page&63);
+ if( gaMainBitmap[page >> 6 ] + 1 == 0 )
+ gaSuperBitmap[page>> 12] |= 1L << ((page >> 6) & 63);
}
}
if( PAddr >> 12 > giMaxPhysPage ) return ;
- if( gaMultiBitmap[ page >> 6 ] & (1 << (page&63)) ) {
+ if( gaMultiBitmap[ page >> 6 ] & (1L << (page&63)) ) {
gaiPageReferences[ page ] --;
if( gaiPageReferences[ page ] == 1 )
- gaMultiBitmap[ page >> 6 ] &= ~(1 << (page&63));
+ gaMultiBitmap[ page >> 6 ] &= ~(1L << (page&63));
if( gaiPageReferences[ page ] == 0 )
- gaMainBitmap[ page >> 6 ] &= ~(1 << (page&63));
+ gaMainBitmap[ page >> 6 ] &= ~(1L << (page&63));
}
else
- gaMainBitmap[ page >> 6 ] &= ~(1 << (page&63));
+ gaMainBitmap[ page >> 6 ] &= ~(1L << (page&63));
- // TODO: Update free counts
- if( !(gaMainBitmap[ page >> 6 ] & (1 << (page&63))) )
+ // Update the free counts if the page was freed
+ if( !(gaMainBitmap[ page >> 6 ] & (1L << (page&63))) )
{
int rangeID;
rangeID = MM_int_GetRangeID( PAddr );
giPhysRangeFree[ rangeID ] ++;
+ if( giPhysRangeFirst[rangeID] > page )
+ giPhysRangeFirst[rangeID] = page;
+ if( giPhysRangeLast[rangeID] < page )
+ giPhysRangeLast[rangeID] = page;
}
- if(gaMainBitmap[ page >> 6 ] == 0) {
- gaSuperBitmap[page >> 12] &= ~(1 << ((page >> 6) & 63));
+ // 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));
}
}