+++ /dev/null
-#ifndef __LUNAIX_ARCH_PAGETABLE_H
-#define __LUNAIX_ARCH_PAGETABLE_H
-
-#include <lunaix/types.h>
-#include <lunaix/compiler.h>
-
-/* ******** Page Table Manipulation ******** */
-
-// Levels of page table to traverse for a single page walk
-#define _PTW_LEVEL 2
-
-#define _PAGE_BASE_SHIFT 12
-#define _PAGE_BASE_SIZE ( 1UL << _PAGE_BASE_SHIFT )
-#define _PAGE_BASE_MASK ( _PAGE_BASE_SIZE - 1)
-
-#define _PAGE_LEVEL_SHIFT 10
-#define _PAGE_LEVEL_SIZE ( 1UL << _PAGE_LEVEL_SHIFT )
-#define _PAGE_LEVEL_MASK ( _PAGE_LEVEL_SIZE - 1 )
-#define _PAGE_Ln_SIZE(n) ( 1UL << (_PAGE_BASE_SHIFT + _PAGE_LEVEL_SHIFT * (_PTW_LEVEL - (n) - 1)) )
-
-// Note: we set VMS_SIZE = VMS_MASK as it is impossible
-// to express 4Gi in 32bit unsigned integer
-
-#define VMS_MASK ( -1UL )
-#define VMS_SIZE VMS_MASK
-
-/* General size of a LnT huge page */
-
-#define L0T_SIZE _PAGE_Ln_SIZE(0)
-#define L1T_SIZE _PAGE_Ln_SIZE(1)
-#define L2T_SIZE _PAGE_Ln_SIZE(1)
-#define L3T_SIZE _PAGE_Ln_SIZE(1)
-#define LFT_SIZE _PAGE_Ln_SIZE(1)
-
-/* General mask to get page offset of a LnT huge page */
-
-#define L0T_MASK ( L0T_SIZE - 1 )
-#define L1T_MASK ( L1T_SIZE - 1 )
-#define L2T_MASK ( L2T_SIZE - 1 )
-#define L3T_MASK ( L3T_SIZE - 1 )
-#define LFT_MASK ( LFT_SIZE - 1 )
-
-/* Masks to get index of a LnTE */
-
-#define L0T_INDEX_MASK ( VMS_MASK ^ L0T_MASK )
-#define L1T_INDEX_MASK ( L0T_MASK ^ L1T_MASK )
-#define L2T_INDEX_MASK ( L1T_MASK ^ L2T_MASK )
-#define L3T_INDEX_MASK ( L2T_MASK ^ L3T_MASK )
-#define LFT_INDEX_MASK ( L3T_MASK ^ LFT_MASK )
-
-#define PAGE_SHIFT _PAGE_BASE_SHIFT
-#define PAGE_SIZE _PAGE_BASE_SIZE
-#define PAGE_MASK _PAGE_BASE_MASK
-
-#define LEVEL_SHIFT _PAGE_LEVEL_SHIFT
-#define LEVEL_SIZE _PAGE_LEVEL_SIZE
-#define LEVEL_MASK _PAGE_LEVEL_MASK
-
-// max PTEs number
-#define MAX_PTEN _PAGE_LEVEL_SIZE
-
-// max translation level supported
-#define MAX_LEVEL _PTW_LEVEL
-
-
-/* ******** PTE Manipulation ******** */
-
-struct __pte {
- unsigned int val;
-} align(4);
-
-#ifndef pte_t
-typedef struct __pte pte_t;
-#endif
-
-typedef unsigned int pfn_t;
-typedef unsigned int pte_attr_t;
-
-#define _PTE_P (1 << 0)
-#define _PTE_W (1 << 1)
-#define _PTE_U (1 << 2)
-#define _PTE_WT (1 << 3)
-#define _PTE_CD (1 << 4)
-#define _PTE_A (1 << 5)
-#define _PTE_D (1 << 6)
-#define _PTE_PS (1 << 7)
-#define _PTE_PAT (1 << 7)
-#define _PTE_G (1 << 8)
-#define _PTE_X (0)
-#define _PTE_R (0)
-
-#define _PTE_PROT_MASK ( _PTE_W | _PTE_U | _PTE_X )
-
-#define KERNEL_PAGE ( _PTE_P )
-#define KERNEL_EXEC ( KERNEL_PAGE | _PTE_X )
-#define KERNEL_DATA ( KERNEL_PAGE | _PTE_W )
-#define KERNEL_RDONLY ( KERNEL_PAGE )
-
-#define USER_PAGE ( _PTE_P | _PTE_U )
-#define USER_EXEC ( USER_PAGE | _PTE_X )
-#define USER_DATA ( USER_PAGE | _PTE_W )
-#define USER_RDONLY ( USER_PAGE )
-
-#define SELF_MAP ( KERNEL_DATA | _PTE_WT | _PTE_CD )
-
-#define __mkpte_from(pte_val) ((pte_t){ .val = (pte_val) })
-#define __MEMGUARD 0xdeadc0deUL
-
-#define null_pte ( __mkpte_from(0) )
-#define guard_pte ( __mkpte_from(__MEMGUARD) )
-#define pte_val(pte) ( pte.val )
-
-
-static inline bool
-pte_isguardian(pte_t pte)
-{
- return pte.val == __MEMGUARD;
-}
-
-static inline pte_t
-mkpte_prot(pte_attr_t prot)
-{
- pte_attr_t attrs = (prot & _PTE_PROT_MASK) | _PTE_P;
- return __mkpte_from(attrs);
-}
-
-static inline pte_t
-mkpte(ptr_t paddr, pte_attr_t prot)
-{
- pte_attr_t attrs = (prot & _PTE_PROT_MASK) | _PTE_P;
- return __mkpte_from((paddr & ~_PAGE_BASE_MASK) | attrs);
-}
-
-static inline pte_t
-mkpte_root(ptr_t paddr, pte_attr_t prot)
-{
- pte_attr_t attrs = (prot & _PTE_PROT_MASK) | _PTE_P;
- return __mkpte_from((paddr & ~_PAGE_BASE_MASK) | attrs);
-}
-
-static inline pte_t
-mkpte_raw(unsigned long pte_val)
-{
- return __mkpte_from(pte_val);
-}
-
-static inline pte_t
-pte_setpaddr(pte_t pte, ptr_t paddr)
-{
- return __mkpte_from((pte.val & _PAGE_BASE_MASK) | (paddr & ~_PAGE_BASE_MASK));
-}
-
-static inline pte_t
-pte_setppfn(pte_t pte, pfn_t ppfn)
-{
- return __mkpte_from((pte.val & _PAGE_BASE_MASK) | (ppfn * PAGE_SIZE));
-}
-
-static inline ptr_t
-pte_paddr(pte_t pte)
-{
- return pte.val & ~_PAGE_BASE_MASK;
-}
-
-static inline pfn_t
-pte_ppfn(pte_t pte)
-{
- return pte.val >> _PAGE_BASE_SHIFT;
-}
-
-static inline pte_t
-pte_setprot(pte_t pte, ptr_t prot)
-{
- return __mkpte_from((pte.val & ~_PTE_PROT_MASK) | (prot & _PTE_PROT_MASK));
-}
-
-static inline pte_attr_t
-pte_prot(pte_t pte)
-{
- return (pte.val & _PTE_PROT_MASK);
-}
-
-static inline bool
-pte_isnull(pte_t pte)
-{
- return !pte.val;
-}
-
-static inline pte_t
-pte_mkhuge(pte_t pte)
-{
- return __mkpte_from(pte.val | _PTE_PS);
-}
-
-static inline pte_t
-pte_mkvolatile(pte_t pte)
-{
- return __mkpte_from(pte.val | _PTE_WT | _PTE_CD);
-}
-
-static inline pte_t
-pte_mkroot(pte_t pte)
-{
- return __mkpte_from(pte.val & ~_PTE_PS);
-}
-
-static inline pte_t
-pte_usepat(pte_t pte)
-{
- return __mkpte_from(pte.val | _PTE_PAT);
-}
-
-static inline bool
-pte_huge(pte_t pte)
-{
- return !!(pte.val & _PTE_PS);
-}
-
-static inline pte_t
-pte_mkloaded(pte_t pte)
-{
- return __mkpte_from(pte.val | _PTE_P);
-}
-
-static inline pte_t
-pte_mkunloaded(pte_t pte)
-{
- return __mkpte_from(pte.val & ~_PTE_P);
-}
-
-static inline bool
-pte_isloaded(pte_t pte)
-{
- return !!(pte.val & _PTE_P);
-}
-
-static inline pte_t
-pte_mkwprotect(pte_t pte)
-{
- return __mkpte_from(pte.val & ~_PTE_W);
-}
-
-static inline pte_t
-pte_mkwritable(pte_t pte)
-{
- return __mkpte_from(pte.val | _PTE_W);
-}
-
-static inline bool
-pte_iswprotect(pte_t pte)
-{
- return !(pte.val & _PTE_W);
-}
-
-static inline pte_t
-pte_mkuser(pte_t pte)
-{
- return __mkpte_from(pte.val | _PTE_U);
-}
-
-static inline pte_t
-pte_mkkernel(pte_t pte)
-{
- return __mkpte_from(pte.val & ~_PTE_U);
-}
-
-static inline bool
-pte_allow_user(pte_t pte)
-{
- return !!(pte.val & _PTE_U);
-}
-
-static inline pte_t
-pte_mkexec(pte_t pte)
-{
- return __mkpte_from(pte.val | _PTE_X);
-}
-
-static inline pte_t
-pte_mknonexec(pte_t pte)
-{
- return __mkpte_from(pte.val & ~_PTE_X);
-}
-
-static inline bool
-pte_isexec(pte_t pte)
-{
- return !!(pte.val & _PTE_X);
-}
-
-static inline pte_t
-pte_mkuntouch(pte_t pte)
-{
- return __mkpte_from(pte.val & ~_PTE_A);
-}
-
-static inline bool
-pte_istouched(pte_t pte)
-{
- return !!(pte.val & _PTE_A);
-}
-
-static inline pte_t
-pte_mkclean(pte_t pte)
-{
- return __mkpte_from(pte.val & ~_PTE_D);
-}
-
-static inline bool
-pte_dirty(pte_t pte)
-{
- return !!(pte.val & _PTE_D);
-}
-
-static inline void
-set_pte(pte_t* ptep, pte_t pte)
-{
- ptep->val = pte.val;
-}
-
-static inline pte_t
-pte_at(pte_t* ptep) {
- return *ptep;
-}
-
-
-#endif /* __LUNAIX_ARCH_PAGETABLE_H */
git://scm.lunaixsky.com / lunaix-os.git / blobdiff