beginning to things out into cpu-dependent and cpu-independent code

1 files changed, 30 insertions, 0 deletions

diff --git a/kc/core/cpu/mmu.c b/kc/core/cpu/mmu.c
new file mode 100644
index 0000000..60bee0f
--- /dev/null
+++ b/kc/core/cpu/mmu.c
@@ -0,0 +1,30 @@
+#include "mmu.h"
+#include "irq.h"
+
+#include <kernel/memory/paging.h>
+
+void mmu_set_map(phys_addr_t map)
+{
+    irq_lock();
+    __asm__ volatile ("mov %0, %%cr3" :: "r"(page_address(map, 1)));
+    irq_unlock();
+}
+
+phys_addr_t mmu_get_map(void)
+{
+    phys_addr_t pm4_phys;
+    irq_lock();
+    __asm__ volatile
+        (
+         "mov %%cr3, %0\n\t"
+         : "=r"(pm4_phys)
+        );
+    irq_unlock();
+    return page_address(pm4_phys, 1);
+}
+
+void mmu_invalidate(void *addr)
+{
+    __asm__ volatile ("invlpg (%0)" :: "r"(addr));
+}
+