refactor: one more step towards arch-agnostic design

[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
index c9818396870b7d3e3c9337b4f3a6def5409f73df..38dcf71aaa8ffe5ab5316e2438c68c28041e3189 100644 (file)
--- a/lunaix-os/includes/lunaix/mm/page.h
+++ b/lunaix-os/includes/lunaix/mm/page.h
@@ -1,62 +1,111 @@
 #ifndef __LUNAIX_PAGE_H
 #define __LUNAIX_PAGE_H
 #ifndef __LUNAIX_PAGE_H
 #define __LUNAIX_PAGE_H

-#include <stdint.h>
-#include <lunaix/constants.h>
+#include <lunaix/common.h>
+#include <lunaix/types.h>

 
 

-#define PG_MAX_ENTRIES              1024U
-#define PG_LAST_TABLE               PG_MAX_ENTRIES - 1
-#define PG_FIRST_TABLE              0
+#define PG_SIZE_BITS 12
+#define PG_SIZE (1 << PG_SIZE_BITS)

 
 

-#define P2V(paddr)          ((uintptr_t)(paddr)  +  HIGHER_HLF_BASE)
-#define V2P(vaddr)          ((uintptr_t)(vaddr)  -  HIGHER_HLF_BASE)
+#define PG_MAX_ENTRIES 1024U
+#define PG_LAST_TABLE PG_MAX_ENTRIES - 1
+#define PG_FIRST_TABLE 0

 
 

-#define PG_ALIGN(addr)      ((uintptr_t)(addr)   & 0xFFFFF000UL)
+#define PTE_NULL 0

 
 

-#define PD_INDEX(vaddr)     (((uintptr_t)(vaddr) & 0xFFC00000UL) >> 22)
-#define PT_INDEX(vaddr)     (((uintptr_t)(vaddr) & 0x003FF000UL) >> 12)
-#define PG_OFFSET(vaddr)    ((uintptr_t)(vaddr)  & 0x00000FFFUL)
+#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 PN(addr) (((ptr_t)(addr) >> 12))

 
 

-#define GET_PT_ADDR(pde)    PG_ALIGN(pde)
-#define GET_PG_ADDR(pte)    PG_ALIGN(pte)
+#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 PG_DIRTY(pte)           ((pte & (1 << 6)) >> 6)
-#define PG_ACCESSED(pte)        ((pte & (1 << 5)) >> 5)
+#define GET_PT_ADDR(pde) PG_ALIGN(pde)
+#define GET_PG_ADDR(pte) PG_ALIGN(pte)

 
 

-#define IS_CACHED(entry)    ((entry & 0x1))
+#define IS_CACHED(entry) ((entry & 0x1))

 
 

-#define PG_PRESENT              (0x1)
-#define PG_WRITE                (0x1 << 1)
-#define PG_ALLOW_USER           (0x1 << 2)
-#define PG_WRITE_THROUGHT       (1 << 3)
-#define PG_DISABLE_CACHE        (1 << 4)
-#define PG_PDE_4MB              (1 << 7)
+#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 PDE(flags, pt_addr)     (PG_ALIGN(pt_addr) | ((flags) & 0xfff))
-#define PTE(flags, pg_addr)     (PG_ALIGN(pg_addr) | ((flags) & 0xfff))
+#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 V_ADDR(pd, pt, offset)  ((pd) << 22 | (pt) << 12 | (offset))
-#define P_ADDR(ppn, offset)     ((ppn << 12) | (offset))
+#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))

 
 

-// 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 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
-#define T_SELF_REF_PERM        PG_PREM_RW | PG_DISABLE_CACHE
+#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
 
 // 页目录的虚拟基地址，可以用来访问到各个PDE

-#define PTD_BASE_VADDR                0xFFFFF000U
+#define L1_BASE_VADDR 0xFFFFF000U

 
 // 页表的虚拟基地址，可以用来访问到各个PTE
 
 // 页表的虚拟基地址，可以用来访问到各个PTE

-#define PT_BASE_VADDR                 0xFFC00000U
+#define L2_BASE_VADDR 0xFFC00000U

 
 // 用来获取特定的页表的虚拟地址
 
 // 用来获取特定的页表的虚拟地址

-#define PT_VADDR(pd_offset)           (PT_BASE_VADDR | (pd_offset << 12))
+#define L2_VADDR(pd_offset) (L2_BASE_VADDR | (pd_offset << 12))

 
 

-typedef unsigned int ptd_t;
-typedef unsigned int pt_t;
+typedef unsigned long ptd_t;
+typedef unsigned long pt_t;

 typedef unsigned int pt_attr;
 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
+    u16_t flags;
+    // PTE地址
+    x86_pte_t* pte;
+} v_mapping;
+
+typedef struct
+{
+    x86_pte_t entry[PG_MAX_ENTRIES];
+} __attribute__((packed, aligned(4))) x86_page_table;
+
+/* 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)
+
+/*
+    当前进程内存空间挂载点
+*/
+#define VMS_SELF L2_BASE_VADDR
+
+#define PTE_MOUNTED(mnt, vpn)                                                  \
+    (((x86_page_table*)((mnt) | (((vpn)&0xffc00) << 2)))->entry[(vpn)&0x3ff])

 
 #endif /* __LUNAIX_PAGE_H */
 
 #endif /* __LUNAIX_PAGE_H */