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