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#ifndef MELVIX_KHEAP_H
#define MELVIX_KHEAP_H
#include "ordered_array.h"
#define KHEAP_START 0xC0000000
#define KHEAP_INITIAL_SIZE 0x100000
#define HEAP_INDEX_SIZE 0x20000
#define HEAP_MAGIC 0x03A93A90
#define HEAP_MIN_SIZE 0x70000
/**
* Size information of holes/blocks
*/
typedef struct {
uint32_t magic;
unsigned char is_hole; // 1 if hole
uint32_t size;
} header_t;
typedef struct {
uint32_t magic;
header_t *header;
} footer_t;
typedef struct {
ordered_array_t index;
uint32_t start_address;
uint32_t end_address;
uint32_t max_address;
unsigned char supervisor;
unsigned char readonly;
} heap_t;
/**
* Create a new heap
* @param start
* @param end
* @param max
* @param supervisor
* @param readonly
* @return The heap pointer
*/
heap_t *create_heap(uint32_t start, uint32_t end, uint32_t max, unsigned char supervisor, unsigned char readonly);
/**
* Allocate a region of memory
* @param size The size of the memory
* @param page_align Start the block on a page boundary
* @param heap The Heap pointer
* @return
*/
void *alloc(uint32_t size, unsigned char page_align, heap_t *heap);
/**
* Release an allocated block
* @param p The block
* @param heap The heap
*/
void free(void *p, heap_t *heap);
/**
* Release an allocated block using kheap
* @param p The block
*/
void kfree(void *p);
/**
* Allocate a chunk of memory
* @param sz The size of the memory
* @param align Start the block on a page boundary
* @param phys Location of the memory if not 0
* @return The memory address
*/
uint32_t kmalloc_int(uint32_t sz, int align, uint32_t *phys);
/**
* Allocate a page-aligned chunk of memory
* @param sz The size of the memory
* @return The memory address
*/
uint32_t kmalloc_a(uint32_t sz);
/**
* Allocate a chunk of memory in a physical address
* @param sz The size of the memory
* @param phys The physical address
* @return The memory address
*/
uint32_t kmalloc_p(uint32_t sz, uint32_t *phys);
/**
* Allocate a page-aligned chunk of memory in a physical address
* @param sz The size of the memory
* @param phys The physical address
* @return The memory address
*/
uint32_t kmalloc_ap(uint32_t sz, uint32_t *phys);
/**
* Allocate a chunk of memory (non page-aligned and no physical address)
* @param sz The size of the memory
* @return The memory address
*/
uint32_t kmalloc(uint32_t sz);
#endif
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