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#include <stdio.h>
#include <stdlib.h>
#include <mem.h>
#include <log.h>
// TODO: Better data structure
struct memory {
size_t size;
vaddr virt; // for vm
void *physical; // actually alloced
struct memory *next;
};
static struct memory *memory = 0;
static struct memory *head = 0;
static uint64_t zero = 0;
void *mem_alloc(size_t size, vaddr virt)
{
if (head) {
memory->next = malloc(sizeof(*head));
memory = memory->next;
} else {
head = malloc(sizeof(*head));
memory = head;
}
memory->size = size;
memory->virt = virt;
memory->physical = calloc(1, size);
memory->next = 0;
return memory->physical;
}
void *mem_phys(vaddr virt)
{
struct memory *iterator = head;
while (iterator) {
if (virt >= iterator->virt &&
virt < iterator->virt + iterator->size)
return iterator->physical + (virt - iterator->virt);
iterator = iterator->next;
}
errln("illegal memory access %x", virt);
return &zero;
}
void mem_destroy(void)
{
struct memory *iterator = head;
while (iterator) {
free(iterator->physical);
struct memory *temp = iterator->next;
free(iterator);
iterator = temp;
}
}
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