A Total Overhaul on the Lunaix's Virtual Memory Model (#26)

[lunaix-os.git] / lunaix-os / includes / lunaix / mm / page.h

diff --git a/lunaix-os/includes/lunaix/mm/page.h b/lunaix-os/includes/lunaix/mm/page.h
deleted file mode 100644 (file)
index 446e14e..0000000
--- a/lunaix-os/includes/lunaix/mm/page.h
+++ /dev/null
@@ -1,117 +0,0 @@
-#ifndef __LUNAIX_PAGE_H
-#define __LUNAIX_PAGE_H
-#include <lunaix/common.h>
-#include <stdint.h>
-
-#define PG_SIZE_BITS 12
-#define PG_SIZE (1 << PG_SIZE_BITS)
-#define PG_INDEX_BITS 10
-
-#define PG_MAX_ENTRIES 1024U
-#define PG_LAST_TABLE PG_MAX_ENTRIES - 1
-#define PG_FIRST_TABLE 0
-
-#define PTE_NULL 0
-
-#define P2V(paddr) ((uintptr_t)(paddr) + HIGHER_HLF_BASE)
-#define V2P(vaddr) ((uintptr_t)(vaddr)-HIGHER_HLF_BASE)
-
-#define PG_ALIGN(addr) ((uintptr_t)(addr)&0xFFFFF000UL)
-
-#define L1_INDEX(vaddr) (uint32_t)(((uintptr_t)(vaddr)&0xFFC00000UL) >> 22)
-#define L2_INDEX(vaddr) (uint32_t)(((uintptr_t)(vaddr)&0x003FF000UL) >> 12)
-#define PG_OFFSET(vaddr) (uint32_t)((uintptr_t)(vaddr)&0x00000FFFUL)
-
-#define GET_PT_ADDR(pde) PG_ALIGN(pde)
-#define GET_PG_ADDR(pte) PG_ALIGN(pte)
-
-#define PG_DIRTY(pte) ((pte & (1 << 6)) >> 6)
-#define PG_ACCESSED(pte) ((pte & (1 << 5)) >> 5)
-
-#define IS_CACHED(entry) ((entry & 0x1))
-
-#define PG_PRESENT (0x1)
-#define PG_WRITE (0x1 << 1)
-#define PG_ALLOW_USER (0x1 << 2)
-#define PG_WRITE_THROUGH (1 << 3)
-#define PG_DISABLE_CACHE (1 << 4)
-#define PG_PDE_4MB (1 << 7)
-
-#define NEW_L1_ENTRY(flags, pt_addr)                                           \
-    (PG_ALIGN(pt_addr) | (((flags) | PG_WRITE_THROUGH) & 0xfff))
-#define NEW_L2_ENTRY(flags, pg_addr) (PG_ALIGN(pg_addr) | ((flags)&0xfff))
-
-#define V_ADDR(pd, pt, offset) ((pd) << 22 | (pt) << 12 | (offset))
-#define P_ADDR(ppn, offset) ((ppn << 12) | (offset))
-
-#define PG_ENTRY_FLAGS(entry) ((entry)&0xFFFU)
-#define PG_ENTRY_ADDR(entry) ((entry) & ~0xFFFU)
-
-#define HAS_FLAGS(entry, flags) ((PG_ENTRY_FLAGS(entry) & (flags)) == flags)
-#define CONTAINS_FLAGS(entry, flags) (PG_ENTRY_FLAGS(entry) & (flags))
-
-#define PG_PREM_R PG_PRESENT
-#define PG_PREM_RW PG_PRESENT | PG_WRITE
-#define PG_PREM_UR PG_PRESENT | PG_ALLOW_USER
-#define PG_PREM_URW PG_PRESENT | PG_WRITE | PG_ALLOW_USER
-
-// 用于对PD进行循环映射，因为我们可能需要对PD进行频繁操作，我们在这里禁用TLB缓存
-#define T_SELF_REF_PERM PG_PREM_RW | PG_DISABLE_CACHE | PG_WRITE_THROUGH
-
-// 页目录的虚拟基地址，可以用来访问到各个PDE
-#define L1_BASE_VADDR 0xFFFFF000U
-
-// 页表的虚拟基地址，可以用来访问到各个PTE
-#define L2_BASE_VADDR 0xFFC00000U
-
-// 用来获取特定的页表的虚拟地址
-#define L2_VADDR(pd_offset) (L2_BASE_VADDR | (pd_offset << 12))
-
-typedef unsigned long ptd_t;
-typedef unsigned long pt_t;
-typedef unsigned int pt_attr;
-typedef uint32_t x86_pte_t;
-
-/**
- * @brief 虚拟映射属性
- *
- */
-typedef struct
-{
-    // 虚拟页地址
-    uintptr_t va;
-    // 物理页码（如果不存在映射，则为0）
-    uint32_t pn;
-    // 物理页地址（如果不存在映射，则为0）
-    uintptr_t pa;
-    // 映射的flags
-    uint16_t flags;
-    // PTE地址
-    x86_pte_t* pte;
-} v_mapping;
-
-typedef struct
-{
-    x86_pte_t entry[PG_MAX_ENTRIES];
-} __attribute__((packed)) x86_page_table;
-
-extern void __pg_mount_point;
-
-/* 四个页挂载点，两个页目录挂载点： 用于临时创建&编辑页表 */
-#define PG_MOUNT_RANGE(l1_index) (701 <= l1_index && l1_index <= 703)
-#define PD_MOUNT_1 0xAFC00000
-#define PD_MOUNT_2 0xAF800000
-#define PG_MOUNT_BASE 0xAF7FF000
-#define PG_MOUNT_1 (PG_MOUNT_BASE)
-#define PG_MOUNT_2 (PG_MOUNT_BASE - 0x1000)
-#define PG_MOUNT_3 (PG_MOUNT_BASE - 0x2000)
-#define PG_MOUNT_4 (PG_MOUNT_BASE - 0x3000)
-#define PD_REFERENCED L2_BASE_VADDR
-
-#define CURPROC_PTE(vpn)                                                       \
-    (&((x86_page_table*)(PD_MOUNT_1 | (((vpn)&0xffc00) << 2)))                 \
-        ->entry[(vpn)&0x3ff])
-#define PTE_MOUNTED(mnt, vpn)                                                  \
-    (((x86_page_table*)((mnt) | (((vpn)&0xffc00) << 2)))->entry[(vpn)&0x3ff])
-
-#endif /* __LUNAIX_PAGE_H */