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#include "comus/memory.h"
#include "lib/klib.h"
#include <lib.h>
#include <comus/mboot.h>
#include "mboot.h"
#define MULTIBOOT_TAG_TYPE_MMAP 6
struct multiboot_mmap_entry {
uint64_t addr;
uint64_t len;
uint32_t type;
uint32_t zero;
};
struct multiboot_tag_mmap {
uint32_t type;
uint32_t size;
uint32_t entry_size;
uint32_t entry_version;
struct multiboot_mmap_entry entries[];
};
int mboot_get_mmap(struct memory_map *res)
{
void *tag = locate_mboot_table(MULTIBOOT_TAG_TYPE_MMAP);
if (tag == NULL)
return 1;
struct multiboot_tag_mmap *mmap = (struct multiboot_tag_mmap *)tag;
int idx = 0;
uintptr_t i = (uintptr_t)mmap->entries;
for (; i < (uintptr_t)mmap->entries + mmap->size;
i += mmap->entry_size, idx++) {
if (idx >= N_MMAP_ENTRY)
panic("Too many mmap entries: limit is %d", N_MMAP_ENTRY);
struct multiboot_mmap_entry *seg = (struct multiboot_mmap_entry *)i;
res->entries[idx].addr = seg->addr;
res->entries[idx].len = seg->len;
res->entries[idx].type = seg->type;
}
res->entry_count = idx;
return 0;
}
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