Squash commits for public release

kernel/include/mem/bits/vm.h

@@ -0,0 +1,68 @@
+#ifndef _KERNEL_MEM_BITS_VM_H
+#define _KERNEL_MEM_BITS_VM_H
+
+#include <libkern/types.h>
+#include <mem/bits/mmu.h>
+#include <platform/generic/vmm/consts.h>
+#include <platform/generic/vmm/mmu.h>
+
+#ifndef VMM_LV2_ENTITY_COUNT
+#define VMM_LV2_ENTITY_COUNT (1)
+#endif
+
+#ifndef VMM_LV3_ENTITY_COUNT
+#define VMM_LV3_ENTITY_COUNT (1)
+#endif
+
+#ifndef PTABLE_LV2_VADDR_OFFSET
+#define PTABLE_LV2_VADDR_OFFSET (32)
+#endif
+
+#ifndef PTABLE_LV3_VADDR_OFFSET
+#define PTABLE_LV3_VADDR_OFFSET (32)
+#endif
+
+#define PTABLE_ENTITY_COUNT(lv) (ptable_entity_count_at_level[lv])
+#define PTABLE_SIZE(lv) (ptable_size_at_level[lv])
+#define IS_INDIVIDUAL_PER_DIR(index) (index < PTABLE_TOP_KERNEL_OFFSET || (index == VMM_OFFSET_IN_DIRECTORY(pspace_zone.start)))
+
+typedef struct {
+    ptable_entity_t entities[1];
+} ptable_t;
+
+static const size_t ptable_entity_count_at_level[] = {
+    [PTABLE_LV0] = VMM_LV0_ENTITY_COUNT,
+    [PTABLE_LV1] = VMM_LV1_ENTITY_COUNT,
+    [PTABLE_LV2] = VMM_LV2_ENTITY_COUNT,
+    [PTABLE_LV3] = VMM_LV3_ENTITY_COUNT,
+};
+
+static const size_t ptable_size_at_level[] = {
+    [PTABLE_LV0] = VMM_LV0_ENTITY_COUNT * sizeof(ptable_entity_t),
+    [PTABLE_LV1] = VMM_LV1_ENTITY_COUNT * sizeof(ptable_entity_t),
+    [PTABLE_LV2] = VMM_LV2_ENTITY_COUNT * sizeof(ptable_entity_t),
+    [PTABLE_LV3] = VMM_LV3_ENTITY_COUNT * sizeof(ptable_entity_t),
+};
+
+static const size_t ptable_entity_vaddr_offset_at_level[] = {
+    [PTABLE_LV0] = PTABLE_LV0_VADDR_OFFSET,
+    [PTABLE_LV1] = PTABLE_LV1_VADDR_OFFSET,
+    [PTABLE_LV2] = PTABLE_LV2_VADDR_OFFSET,
+    [PTABLE_LV3] = PTABLE_LV3_VADDR_OFFSET,
+};
+
+#define VM_VADDR_OFFSET_AT_LEVEL(vaddr, lv) ((vaddr >> ptable_entity_vaddr_offset_at_level[lv]) % ptable_entity_count_at_level[lv])
+
+static inline ptable_lv_t lower_level(ptable_lv_t lv)
+{
+    ASSERT(lv != PTABLE_LV0);
+    return lv - 1;
+}
+
+static inline ptable_lv_t upper_level(ptable_lv_t lv)
+{
+    ASSERT(lv != PTABLE_LV_TOP);
+    return lv + 1;
+}
+
+#endif // _KERNEL_MEM_BITS_VM_H