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vmm: brokie paging :)

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RaphProductions 2025-05-18 18:58:22 +02:00
parent 9c21f343ba
commit 33f88512d4
13 changed files with 324 additions and 100 deletions
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29
kernel/src/arch/x86_64/cpu.c
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@ -5,17 +5,46 @@
* cpu.c - x86_64 CPU control implementation.
*/
#include "mm/vmm.h"
#if defined (__x86_64__)
#include <arch/x86_64/gdt.h>
#include <arch/x86_64/idt.h>
#include <arch/cpu.h>
#include <mm/pmm.h>
void arch_init_stage1() {
gdt_init();
idt_init();
}
void cpu_load_pm(pagemap_t pm) {
if (!pm)
return;
__asm__ volatile("mov %0, %%cr3" : : "r"(physical((uint64_t)pm)) : "memory");
}
static uint64_t read_cr3(void)
{
unsigned long val;
asm volatile ( "mov %%cr3, %0" : "=r"(val) );
return val;
}
void cpu_invalidate_page(pagemap_t pm, uint64_t vaddr) {
uint64_t cr3 = read_cr3();
if (physical((uint64_t)pm) != cr3)
{
// load the provided PM in cr3, invalidate the page and return into the previous cr3.
cpu_load_pm(pm);
asm volatile ( "invlpg (%0)" : : "b"(vaddr) : "memory" );
cpu_load_pm((pagemap_t)cr3);
return;
}
asm volatile ( "invlpg (%0)" : : "b"(vaddr) : "memory" );
}
void hcf() {
asm ("cli");
for (;;) {