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#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include "malloc.h"
struct free_arena_header __malloc_head[NHEAP];
static __hugebss char main_heap[128 << 10];
extern char __lowmem_heap[];
void mem_init(void)
{
struct free_arena_header *fp;
int i;
uint16_t *bios_free_mem = (uint16_t *)0x413;
/* Initialize the head nodes */
fp = &__malloc_head[0];
for (i = 0 ; i < NHEAP ; i++) {
fp->a.next = fp->a.prev = fp->next_free = fp->prev_free = fp;
fp->a.attrs = ARENA_TYPE_HEAD | (i << ARENA_HEAP_POS);
fp->a.tag = MALLOC_HEAD;
fp++;
}
/* Initialize the main heap */
fp = (struct free_arena_header *)main_heap;
fp->a.attrs = ARENA_TYPE_USED | (HEAP_MAIN << ARENA_HEAP_POS);
ARENA_SIZE_SET(fp->a.attrs, sizeof main_heap);
__inject_free_block(fp);
/* Initialize the lowmem heap */
fp = (struct free_arena_header *)__lowmem_heap;
fp->a.attrs = ARENA_TYPE_USED | (HEAP_LOWMEM << ARENA_HEAP_POS);
ARENA_SIZE_SET(fp->a.attrs, (*bios_free_mem << 10) - (uintptr_t)fp);
__inject_free_block(fp);
}
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