29 lines
677 B
C
29 lines
677 B
C
// SPDX-License-Identifier: MIT
|
|
|
|
#include <common/utils.h>
|
|
#include <kernel/alloc.h>
|
|
#include <kernel/virt.h>
|
|
#include <stdatomic.h>
|
|
#include <stddef.h>
|
|
|
|
struct page* vm_pfndb = nullptr;
|
|
|
|
// TODO: Replace with actual allocator.
|
|
|
|
static size_t mapping_offset = 0;
|
|
|
|
void* vm_alloc(size_t length) {
|
|
uintptr_t base = arch_mem_mapping_addr();
|
|
size_t offset = atomic_fetch_add(&mapping_offset, ALIGN_UP(length, arch_mem_page_size()));
|
|
|
|
return (void*)(base + offset);
|
|
}
|
|
|
|
void vm_free(void* ptr, size_t length) {
|
|
// TODO
|
|
}
|
|
|
|
uintptr_t vm_page_addr(struct page* page) {
|
|
return (((uintptr_t)page - (uintptr_t)vm_pfndb) / sizeof(struct page)) * arch_mem_page_size();
|
|
}
|