Squash commits for public release

kernel/include/mem/bits/mmu.h

@@ -0,0 +1,42 @@
+#ifndef _KERNEL_MEM_BITS_MMU_H
+#define _KERNEL_MEM_BITS_MMU_H
+
+#include <libkern/types.h>
+
+enum MMU_FLAGS {
+    MMU_FLAG_PERM_WRITE = (1 << 0),
+    MMU_FLAG_PERM_READ = (1 << 1),
+    MMU_FLAG_PERM_EXEC = (1 << 2),
+    MMU_FLAG_UNCACHED = (1 << 3),
+    MMU_FLAG_NONPRIV = (1 << 4),
+    MMU_FLAG_INVALID = (1 << 5),
+    MMU_FLAG_COW = (1 << 6), // TODO: Remove this flag.
+    MMU_FLAG_HUGE_PAGE = (1 << 7),
+    MMU_FLAG_DEVICE = MMU_FLAG_PERM_READ | MMU_FLAG_PERM_WRITE | MMU_FLAG_UNCACHED,
+};
+typedef uint32_t mmu_flags_t;
+
+enum MMU_PF_INFO_FLAGS {
+    MMU_PF_INFO_ON_NOT_PRESENT = (1 << 0),
+    MMU_PF_INFO_ON_WRITE = (1 << 1),
+    MMU_PF_INFO_ON_NONPRIV_ACCESS = (1 << 2),
+    MMU_PF_INFO_SECURITY_VIOLATION = (1 << 3),
+};
+typedef uint32_t mmu_pf_info_flags_t;
+
+enum PTABLE_LEVELS {
+    PTABLE_LV0 = 0,
+    PTABLE_LV1 = 1,
+    PTABLE_LV2 = 2,
+    PTABLE_LV3 = 3,
+};
+typedef enum PTABLE_LEVELS ptable_lv_t;
+
+enum PTABLE_ENTITY_STATES {
+    PTABLE_ENTITY_PRESENT,
+    PTABLE_ENTITY_INVALID,
+    PTABLE_ENTITY_ALLOC, // For arm32 pspace, other targets never return this state.
+};
+typedef uint32_t ptable_state_t;
+
+#endif // _KERNEL_MEM_BITS_MMU_H