stuff

kernel/mem/mmio.c

@@ -0,0 +1,22 @@
+#include <kernel/mmio.h>
+#include <kernel/pmap.h>
+#include <kernel/vas.h>
+#include <kernel/virt.h>
+#include <bits/mem.h>
+
+void* mmio_new(phys_t addr, size_t length) {
+    void* ptr = vm_alloc(length);
+    for (size_t i = 0; i < length; i += arch_mem_page_size()) {
+
+        if (pmap_map(&kernel_vas.pmap, (uintptr_t)ptr + i, addr + i, PTE_READ | PTE_WRITE, CACHE_MMIO)) {
+            vm_free(ptr, length);
+            return nullptr;
+        }
+    }
+
+    return ptr;
+}
+
+void mmio_free(void* ptr, size_t length) {
+    // TODO
+}