Initial commit

kernel/arch/x86_64/include/bits/mem.h

@@ -0,0 +1,41 @@
+#pragma once
+
+#include <kernel/types.h>
+#include <stddef.h>
+#include <stdint.h>
+
+static inline size_t arch_mem_page_bits() {
+    return 12;
+}
+
+static inline size_t arch_mem_level_bits() {
+    return 9;
+}
+
+static inline size_t arch_mem_num_levels() {
+    return 4;
+}
+
+static inline virt_t arch_mem_hhdm_addr() {
+    return 0xFFFF'8000'0000'0000;
+}
+
+static inline virt_t arch_mem_pfndb_addr() {
+    return 0xFFFF'A000'0000'0000;
+}
+
+static inline virt_t arch_mem_mapping_addr() {
+    return 0xFFFF'C000'0000'0000;
+}
+
+typedef uint64_t pte_t;
+enum pte_flags;
+enum cache_mode;
+struct page_table;
+
+void arch_mem_pte_clear(pte_t* pte);
+pte_t arch_mem_pte_build(phys_t addr, enum pte_flags flags, enum cache_mode cache);
+bool arch_mem_pte_is_present(pte_t* pte);
+bool arch_mem_pte_is_dir(pte_t* pte);
+phys_t arch_mem_pte_address(pte_t* pte);
+void arch_mem_pt_set(struct page_table* pt);