#ifndef __LUNAIX_VMM_H
#define __LUNAIX_VMM_H
-#include <lunaix/mm/page.h>
+
+#include <lunaix/mm/pagetable.h>
#include <lunaix/process.h>
-#include <stddef.h>
-#include <stdint.h>
+#include <lunaix/types.h>
// Virtual memory manager
#define VMAP_NULL 0
+
/**
* @brief 映射模式：忽略已存在映射
*
*/
#define VMAP_IGNORE 1
+
/**
* @brief 映射模式：不作实际映射。该功能用于预留出特定的地址空间
*
*/
#define VMAP_NOMAP 2
+/**
+ * @brief 映射页墙：将虚拟地址映射为页墙，忽略给定的物理地址和页属性
+ *
+ */
+#define VMAP_GUARDPAGE 4
+
/**
* @brief 规定下一个可用页映射应当限定在指定的4MB地址空间内
*
void
vmm_init();
-/**
- * @brief 创建一个页目录
- *
- * @return ptd_entry* 页目录的物理地址，随时可以加载进CR3
- */
-x86_page_table*
-vmm_init_pd();
-
/**
* @brief 在指定地址空间中，添加一个映射
*
* @return int
*/
int
-vmm_set_mapping(uintptr_t mnt,
- uintptr_t va,
- uintptr_t pa,
- pt_attr attr,
- int options);
+vmm_set_mapping(ptr_t mnt, ptr_t va, ptr_t pa, pte_attr_t prot);
+
+static inline void
+vmm_set_ptes_contig(pte_t* ptep, pte_t pte, size_t lvl_size, size_t n)
+{
+ do {
+ set_pte(ptep, pte);
+ pte_val(pte) += lvl_size;
+ ptep++;
+ } while (--n > 0);
+}
+
+static inline void
+vmm_set_ptes(pte_t* ptep, pte_t pte, size_t n)
+{
+ do {
+ set_pte(ptep, pte);
+ ptep++;
+ } while (--n > 0);
+}
+
+
+static inline void
+vmm_unset_ptes(pte_t* ptep, size_t n)
+{
+ do {
+ set_pte(ptep, null_pte);
+ ptep++;
+ } while (--n > 0);
+}
+
/**
* @brief 删除一个映射
* @param va
* @return int
*/
-uintptr_t
-vmm_del_mapping(uintptr_t mnt, uintptr_t va);
+ptr_t
+vmm_del_mapping(ptr_t mnt, ptr_t va);
+
+pte_t
+vmm_tryptep(pte_t* ptep, size_t lvl_size);
/**
- * @brief 查找一个映射
+ * @brief 在指定的虚拟地址空间里查找一个映射
*
+ * @param mnt 地址空间锚定点
* @param va 虚拟地址
- * @return v_mapping 映射相关属性
+ * @param mapping 映射相关属性
+ * @return int
*/
-int
-vmm_lookup(uintptr_t va, v_mapping* mapping);
+static inline bool
+vmm_lookupat(ptr_t mnt, ptr_t va, pte_t* pte_out)
+{
+ pte_t pte = vmm_tryptep(mkptep_va(mnt, va), LFT_SIZE);
+ *pte_out = pte;
+
+ return !pte_isnull(pte);
+}
+
/**
* @brief (COW) 为虚拟页创建副本。
* @return void* 包含虚拟页副本的物理页地址。
*
*/
-void*
-vmm_dup_page(pid_t pid, void* pa);
-
-void*
-vmm_dup_vmspace(pid_t pid);
+ptr_t
+vmm_dup_page(ptr_t pa);
/**
* @brief 挂载另一个虚拟地址空间至当前虚拟地址空间
*
* @param pde 页目录的物理地址
- * @return void*
+ * @return ptr_t
*/
-void*
-vmm_mount_pd(uintptr_t mnt, void* pde);
+ptr_t
+vms_mount(ptr_t mnt, ptr_t pde);
/**
* @brief 卸载已挂载的虚拟地址空间
*
*/
-void*
-vmm_unmount_pd(uintptr_t mnt);
+ptr_t
+vms_unmount(ptr_t mnt);
+
+static inline ptr_t
+mount_page(ptr_t mnt, ptr_t pa) {
+ assert(pa);
+ pte_t* ptep = mkptep_va(VMS_SELF, mnt);
+ set_pte(ptep, mkpte(pa, KERNEL_DATA));
+ cpu_flush_page(mnt);
+ return mnt;
+}
+
+static inline ptr_t
+unmount_page(ptr_t mnt) {
+ pte_t* ptep = mkptep_va(VMS_SELF, mnt);
+ set_pte(ptep, null_pte);
+ return mnt;
+}
void*
-vmm_ioremap(uintptr_t paddr, size_t size);
+vmm_ioremap(ptr_t paddr, size_t size);
void*
-vmm_next_free(uintptr_t start, int options);
+vmm_next_free(ptr_t start, int options);
/**
- * @brief 将连续的物理地址空间映射到内核虚拟地址空间
+ * @brief 将指定地址空间的虚拟地址转译为物理地址
*
- * @param paddr 物理地址空间的基地址
- * @param size 物理地址空间的大小
+ * @param mnt 地址空间锚定点
+ * @param va 虚拟地址
* @return void*
*/
-void*
-vmm_vmap(uintptr_t paddr, size_t size, pt_attr attr);
+ptr_t
+vmm_v2pat(ptr_t mnt, ptr_t va);
+
+/**
+ * @brief 将当前地址空间的虚拟地址转译为物理地址。
+ *
+ * @param va 虚拟地址
+ * @return void*
+ */
+static inline ptr_t
+vmm_v2p(ptr_t va)
+{
+ return vmm_v2pat(VMS_SELF, va);
+}
+
+/**
+ * @brief Maps a number of contiguous ptes in kernel
+ * address space
+ *
+ * @param pte the pte to be mapped
+ * @param lvl_size size of the page pointed by the given pte
+ * @param n number of ptes
+ * @return ptr_t
+ */
+ptr_t
+vmap_ptes_at(pte_t pte, size_t lvl_size, int n);
+
+/**
+ * @brief Maps a number of contiguous ptes in kernel
+ * address space (leaf page size)
+ *
+ * @param pte the pte to be mapped
+ * @param n number of ptes
+ * @return ptr_t
+ */
+static inline ptr_t
+vmap_leaf_ptes(pte_t pte, int n)
+{
+ return vmap_ptes_at(pte, LFT_SIZE, n);
+}
+
+/**
+ * @brief Maps a contiguous range of physical address
+ * into kernel address space (leaf page size)
+ *
+ * @param paddr start of the physical address range
+ * @param size size of the physical range
+ * @param prot default protection to be applied
+ * @return ptr_t
+ */
+static inline ptr_t
+vmap(ptr_t paddr, size_t size, pte_attr_t prot)
+{
+ pte_t _pte = mkpte(paddr, prot);
+ return vmap_ptes_at(_pte, LFT_SIZE, leaf_count(size));
+}
#endif /* __LUNAIX_VMM_H */
git://scm.lunaixsky.com / lunaix-os.git / blobdiff