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feat: Started om paging

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This commit is contained in:
Kevin Alavik 2025-05-14 16:38:26 +02:00
parent 2bbc7dd70f
commit fc4de346a3
Signed by: cmpsb
GPG key ID: 10D1CC0526FDC6D7
9 changed files with 275 additions and 9 deletions
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14
kernel/src/emk.c
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@ -10,6 +10,7 @@
#include <arch/idt.h>
#include <sys/kpanic.h>
#include <mm/pmm.h>
#include <arch/paging.h>
__attribute__((used, section(".limine_requests"))) static volatile LIMINE_BASE_REVISION(3);
__attribute__((used, section(".limine_requests"))) static volatile struct limine_memmap_request memmap_request = {
@ -18,14 +19,21 @@ __attribute__((used, section(".limine_requests"))) static volatile struct limine
__attribute__((used, section(".limine_requests"))) static volatile struct limine_hhdm_request hhdm_request = {
.id = LIMINE_HHDM_REQUEST,
.revision = 0};
__attribute__((used, section(".limine_requests"))) volatile struct limine_executable_address_request kernel_address_request = {
.id = LIMINE_EXECUTABLE_ADDRESS_REQUEST,
.response = 0};
__attribute__((used, section(".limine_requests_start"))) static volatile LIMINE_REQUESTS_START_MARKER;
__attribute__((used, section(".limine_requests_end"))) static volatile LIMINE_REQUESTS_END_MARKER;
uint64_t hhdm_offset = 0;
struct limine_memmap_response *memmap = NULL;
uint64_t kvirt = 0;
uint64_t kphys = 0;
uint64_t kstack_top = 0;
void emk_entry(void)
{
__asm__ volatile("movq %%rsp, %0" : "=r"(kstack_top));
if (serial_init(COM1) != 0)
{
/* Just halt and say nothing */
@ -62,13 +70,15 @@ void emk_entry(void)
log_early("Initialized PMM");
/* Test allocate a single physical page */
char *a = pmm_request_pages(1, true);
char *a = palloc(1, true);
if (!a)
kpanic(NULL, "Failed to allocate single physical page");
*a = 32;
log_early("Allocated 1 physical page: %llx", (uint64_t)a);
pmm_release_pages(a, 1);
pfree(a, 1);
paging_init();
hlt();
}