77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
/*
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StarForth — Steady-State Virtual Machine Runtime
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Copyright (c) 2023–2025 Robert A. James
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All rights reserved.
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This file is part of the StarForth project.
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Licensed under the StarForth License, Version 1.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at:
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https://github.com/star.4th@proton.me/StarForth/LICENSE.txt
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This software is provided "AS IS", WITHOUT WARRANTY OF ANY KIND,
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express or implied, including but not limited to the warranties of
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merchantability, fitness for a particular purpose, and noninfringement.
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See the License for the specific language governing permissions and
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limitations under the License.
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StarForth — Steady-State Virtual Machine Runtime
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Copyright (c) 2023–2025 Robert A. James
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All rights reserved.
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This file is part of the StarForth project.
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Licensed under the StarForth License, Version 1.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at:
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https://github.com/star.4th@proton.me/StarForth/LICENSE.txt
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This software is provided "AS IS", WITHOUT WARRANTY OF ANY KIND,
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express or implied, including but not limited to the warranties of
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merchantability, fitness for a particular purpose, and noninfringement.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* vmm.h - Virtual Memory Manager interface (x86_64 4-level paging)
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*/
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#ifndef STARKERNEL_VMM_H
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#define STARKERNEL_VMM_H
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#include <stdint.h>
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#define VMM_PAGE_SIZE 4096ull
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/* Page table entry flags */
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#define VMM_FLAG_PRESENT (1ull << 0)
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#define VMM_FLAG_WRITABLE (1ull << 1)
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#define VMM_FLAG_USER (1ull << 2)
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#define VMM_FLAG_CACHE_DISABLE (1ull << 4) /* maps to PTE_PCD — required for MMIO */
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#define VMM_FLAG_NX (1ull << 63)
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#include "uefi.h"
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typedef struct {
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int present;
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int writable;
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int executable;
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} vmm_page_info_t;
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int vmm_init(BootInfo *boot_info);
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int vmm_map_page(uint64_t vaddr, uint64_t paddr, uint64_t flags);
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int vmm_unmap_page(uint64_t vaddr);
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uint64_t vmm_get_paddr(uint64_t vaddr);
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int vmm_map_range(uint64_t vaddr, uint64_t paddr, uint64_t size, uint64_t flags);
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int vmm_query_page(uint64_t vaddr, vmm_page_info_t *info);
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#endif /* STARKERNEL_VMM_H */
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