#ifndef __LUNAIX_PAGE_H #define __LUNAIX_PAGE_H #include #include #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) ((ptr_t)(paddr) + KERNEL_MM_BASE) #define V2P(vaddr) ((ptr_t)(vaddr)-KERNEL_MM_BASE) #define PG_ALIGN(addr) ((ptr_t)(addr)&0xFFFFF000UL) #define PG_MOD(addr) ((ptr_t)(addr) & ~PG_SIZE) #define PG_ALIGNED(addr) (!((ptr_t)(addr)&0x00000FFFUL)) #define L1_INDEX(vaddr) (u32_t)(((ptr_t)(vaddr)&0xFFC00000UL) >> 22) #define L2_INDEX(vaddr) (u32_t)(((ptr_t)(vaddr)&0x003FF000UL) >> 12) #define PG_OFFSET(vaddr) (u32_t)((ptr_t)(vaddr)&0x00000FFFUL) #define GET_PT_ADDR(pde) PG_ALIGN(pde) #define GET_PG_ADDR(pte) PG_ALIGN(pte) #define IS_CACHED(entry) ((entry & 0x1)) #define PG_PRESENT (0x1) #define PG_DIRTY (1 << 6) #define PG_ACCESSED (1 << 5) #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 PG_IS_DIRTY(pte) ((pte)&PG_DIRTY) #define PG_IS_ACCESSED(pte) ((pte)&PG_ACCESSED) #define PG_IS_PRESENT(pte) ((pte)&PG_PRESENT) #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 u32_t x86_pte_t; /** * @brief 虚拟映射属性 * */ typedef struct { // 虚拟页地址 ptr_t va; // 物理页码（如果不存在映射，则为0） u32_t pn; // 物理页地址（如果不存在映射，则为0） ptr_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 VMS_MOUNT_1 (KERNEL_MM_BASE + MEM_4MB) #define PG_MOUNT_BASE (VMS_MOUNT_1 + MEM_4MB) #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 VMS_SELF L2_BASE_VADDR #define CURPROC_PTE(vpn) \ (&((x86_page_table*)(VMS_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 */