starnakin/42_KFS
1
2
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

wip: kernel and virt allocator

Browse Source
This commit is contained in:
0x35c
2025-11-13 12:09:36 +01:00
parent d30e1e4582
commit c5f8599d90
6 changed files with 34 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
src/memory/virt/page.c
View File

@ -12,13 +12,12 @@
static int16_t find_next_block(size_t nb_pages, uint16_t *pd_index_ptr,
uint32_t **page_table_ptr)
{
for (*pd_index_ptr = 1; *pd_index_ptr < 768; (*pd_index_ptr)++) {
for (*pd_index_ptr = 2; *pd_index_ptr < 768; (*pd_index_ptr)++) {
if (current_pd[(*pd_index_ptr)] == 0x02) {
if (add_page_table(*pd_index_ptr) < 0)
if (add_page_table(*pd_index_ptr, 1) < 0)
return -2;
}
*page_table_ptr =
(uint32_t *)GET_PAGE_ADDR(0, *pd_index_ptr + PT_START);
*page_table_ptr = (uint32_t *)GET_PAGE_ADDR(1, *pd_index_ptr);
for (uint16_t i = 0; i + nb_pages - 1 < PT_SIZE; i++) {
uint16_t j;
for (j = 0; (*page_table_ptr)[i + j] >> 12 == i + j &&
@ -77,11 +76,10 @@ int vfree_pages(void *page_ptr, size_t size)
kprintf(KERN_WARNING "Invalid number of frames\n");
return -1;
}
uint32_t *page_table =
(uint32_t *)GET_PAGE_ADDR(0, PT_START + pd_index);
uint32_t *page_table = (uint32_t *)GET_PAGE_ADDR(1, pd_index);
for (uint16_t i = pt_index; i < pt_index + nb_pages; i++) {
if (page_table[i] >> 12 == i) {
kprintf(KERN_WARNING "Page already free\n");
kprintf(KERN_WARNING "Page already freed\n");
return -2;
}
free_frame((void *)(page_table[i] & PAGE_MASK));