vmm: some work towards page locking

kernel-src/include/kernel/vmm.h

@@ -101,7 +101,10 @@ void vmm_unmap(void *addr, size_t size, int flags);
 bool vmm_pagefault(void *addr, bool user, int actions);
 vmmcontext_t *vmm_newcontext();
 void vmm_switchcontext(vmmcontext_t *ctx);
-void *vmm_getphysical(void *addr, bool hold);
+
+#define VMM_GET_PHYSICAL_FLAGS_HOLD 1
+#define VMM_GET_PHYSICAL_FLAGS_LOCK 2
+void *vmm_getphysical(void *addr, int flags);
 void vmm_apinit();
 void vmm_init();
 

kernel-src/include/x86-64/arch/mmu.h

@@ -24,6 +24,8 @@
 #define ARCH_MMU_FLAGS_UC (1 << 4)
 #define ARCH_MMU_FLAGS_WC ((1 << 12) | (1 << 3)) // PAT5 (limine sets up the 5th PAT entry as WC)
 
+#define PAGE_MASK 0xfffffffffffff000lu
+
 #define ARCH_MMU_REQUIRED_FLAGS ARCH_MMU_FLAGS_READ
 
 typedef uint64_t mmuflags_t;