priv_phys_mem_manager.h

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#ifndef _PRIV_PHYS_MEM_MANAGER_H_
#define _PRIV_PHYS_MEM_MANAGER_H_

#include "types.h"

#define PAGE_SIZE KB(4)
#define MAX_ALLOCS_PERENTRY ((PAGE_SIZE / sizeof(PhysAllocInfoEntry)) - 1)
uint64_t memory_size, page_count;

#define KB4_DIVISOR 5
#define KB4_MAX_VAL 32
#define KB4_MAX_VAL_L 6
#define KB4_MAX_VAL_MASK (0xFFFFFFFF >> (32 - KB4_MAX_VAL_L))

uint32_t *KB4_Blocks_Bitmap, *KB4_Blocks_FreeBitCount;
uint64_t KB4_Blocks_Count, KB4_Blocks_FreeBitCount_EntryNum;

#define I_OFF(i) ((i % KB4_DIVISOR) * KB4_MAX_VAL_L)

#define SET_FREE_BITCOUNT(i, val)                                              \
  (KB4_Blocks_FreeBitCount[(i) / KB4_DIVISOR] =                                \
       (KB4_Blocks_FreeBitCount[(i) / KB4_DIVISOR] &                           \
        ~(KB4_MAX_VAL_MASK << I_OFF((i)))) |                                   \
       (((val)&KB4_MAX_VAL_MASK) << I_OFF((i))))
#define GET_FREE_BITCOUNT(i)                                                   \
  ((KB4_Blocks_FreeBitCount[(i) / KB4_DIVISOR] >> I_OFF((i))) &                \
   KB4_MAX_VAL_MASK)

#define DEC_FREE_BITCOUNT(i) (SET_FREE_BITCOUNT(i, (GET_FREE_BITCOUNT(i) - 1)))
#define INC_FREE_BITCOUNT(i) (SET_FREE_BITCOUNT(i, (GET_FREE_BITCOUNT(i) + 1)))

uint8_t *MB2_Blocks_Bitmap;
uint32_t MB2_Blocks_Count;

uint64_t freePageCount;
uint64_t totalPageCount;
uint64_t lastNonFullPage;

void MemMan_Initialize();
void *MemMan_Alloc(uint64_t size);
void MemMan_Free(void *ptr, uint64_t size);

uint64_t MemMan_CalculateBitmapIndex(uint64_t addr, size_t blockSize);
void MemMan_MarkUsed(uint64_t addr, uint64_t size);
void MemMan_MarkKB4Used(uint64_t addr, uint64_t size);

#endif /* end of include guard: _PRIV_PHYS_MEM_MANAGER_H_ */