271 lines
7.3 KiB
C
271 lines
7.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_SCORE_PGTABLE_H
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#define _ASM_SCORE_PGTABLE_H
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#include <linux/const.h>
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#define __ARCH_USE_5LEVEL_HACK
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#include <asm-generic/pgtable-nopmd.h>
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#include <asm/fixmap.h>
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#include <asm/setup.h>
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#include <asm/pgtable-bits.h>
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extern void load_pgd(unsigned long pg_dir);
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extern pte_t invalid_pte_table[PAGE_SIZE/sizeof(pte_t)];
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/* PGDIR_SHIFT determines what a third-level page table entry can map */
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#define PGDIR_SHIFT 22
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#define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT)
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#define PGDIR_MASK (~(PGDIR_SIZE - 1))
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/*
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* Entries per page directory level: we use two-level, so
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* we don't really have any PUD/PMD directory physically.
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*/
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#define PGD_ORDER 0
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#define PTE_ORDER 0
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#define PTRS_PER_PGD 1024
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#define PTRS_PER_PTE 1024
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#define USER_PTRS_PER_PGD (0x80000000UL/PGDIR_SIZE)
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#define FIRST_USER_ADDRESS 0UL
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#define VMALLOC_START (0xc0000000UL)
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#define PKMAP_BASE (0xfd000000UL)
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#define VMALLOC_END (FIXADDR_START - 2*PAGE_SIZE)
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#define pte_ERROR(e) \
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printk(KERN_ERR "%s:%d: bad pte %08lx.\n", \
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__FILE__, __LINE__, pte_val(e))
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#define pgd_ERROR(e) \
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printk(KERN_ERR "%s:%d: bad pgd %08lx.\n", \
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__FILE__, __LINE__, pgd_val(e))
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/*
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* Empty pgd/pmd entries point to the invalid_pte_table.
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*/
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static inline int pmd_none(pmd_t pmd)
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{
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return pmd_val(pmd) == (unsigned long) invalid_pte_table;
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}
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#define pmd_bad(pmd) (pmd_val(pmd) & ~PAGE_MASK)
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static inline int pmd_present(pmd_t pmd)
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{
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return pmd_val(pmd) != (unsigned long) invalid_pte_table;
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}
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static inline void pmd_clear(pmd_t *pmdp)
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{
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pmd_val(*pmdp) = ((unsigned long) invalid_pte_table);
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}
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#define pte_page(x) pfn_to_page(pte_pfn(x))
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#define pte_pfn(x) ((unsigned long)((x).pte >> PAGE_SHIFT))
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#define pfn_pte(pfn, prot) \
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__pte(((unsigned long long)(pfn) << PAGE_SHIFT) | pgprot_val(prot))
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#define __pgd_offset(address) pgd_index(address)
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#define __pud_offset(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1))
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#define __pmd_offset(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
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/* to find an entry in a kernel page-table-directory */
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#define pgd_offset_k(address) pgd_offset(&init_mm, address)
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#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
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/* to find an entry in a page-table-directory */
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#define pgd_offset(mm, addr) ((mm)->pgd + pgd_index(addr))
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/* Find an entry in the third-level page table.. */
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#define __pte_offset(address) \
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(((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
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#define pte_offset(dir, address) \
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((pte_t *) pmd_page_vaddr(*(dir)) + __pte_offset(address))
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#define pte_offset_kernel(dir, address) \
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((pte_t *) pmd_page_vaddr(*(dir)) + __pte_offset(address))
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#define pte_offset_map(dir, address) \
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((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address))
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#define pte_unmap(pte) ((void)(pte))
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#define __pte_to_swp_entry(pte) \
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((swp_entry_t) { pte_val(pte)})
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#define __swp_entry_to_pte(x) ((pte_t) {(x).val})
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#define pmd_phys(pmd) __pa((void *)pmd_val(pmd))
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#define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
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#define mk_pte(page, prot) pfn_pte(page_to_pfn(page), prot)
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static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
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#define set_pte(pteptr, pteval) (*(pteptr) = pteval)
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#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
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#define pte_clear(mm, addr, xp) \
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do { set_pte_at(mm, addr, xp, __pte(0)); } while (0)
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/*
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* The "pgd_xxx()" functions here are trivial for a folded two-level
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* setup: the pgd is never bad, and a pmd always exists (as it's folded
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* into the pgd entry)
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*/
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#define pgd_present(pgd) (1)
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#define pgd_none(pgd) (0)
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#define pgd_bad(pgd) (0)
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#define pgd_clear(pgdp) do { } while (0)
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#define kern_addr_valid(addr) (1)
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#define pmd_page_vaddr(pmd) pmd_val(pmd)
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#define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL))
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#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT)
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#define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_CACHE)
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#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
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_PAGE_CACHE)
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#define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_CACHE)
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#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_CACHE)
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#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \
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_PAGE_GLOBAL | _PAGE_CACHE)
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#define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT | __READABLE | \
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__WRITEABLE | _PAGE_GLOBAL & ~_PAGE_CACHE)
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#define __P000 PAGE_NONE
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#define __P001 PAGE_READONLY
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#define __P010 PAGE_COPY
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#define __P011 PAGE_COPY
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#define __P100 PAGE_READONLY
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#define __P101 PAGE_READONLY
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#define __P110 PAGE_COPY
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#define __P111 PAGE_COPY
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#define __S000 PAGE_NONE
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#define __S001 PAGE_READONLY
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#define __S010 PAGE_SHARED
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#define __S011 PAGE_SHARED
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#define __S100 PAGE_READONLY
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#define __S101 PAGE_READONLY
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#define __S110 PAGE_SHARED
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#define __S111 PAGE_SHARED
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#define pgprot_noncached pgprot_noncached
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static inline pgprot_t pgprot_noncached(pgprot_t _prot)
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{
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unsigned long prot = pgprot_val(_prot);
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prot = (prot & ~_CACHE_MASK);
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return __pgprot(prot);
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}
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#define __swp_type(x) ((x).val & 0x1f)
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#define __swp_offset(x) ((x).val >> 10)
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#define __swp_entry(type, offset) ((swp_entry_t){(type) | ((offset) << 10)})
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extern unsigned long empty_zero_page;
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extern unsigned long zero_page_mask;
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#define ZERO_PAGE(vaddr) \
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(virt_to_page((void *)(empty_zero_page + \
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(((unsigned long)(vaddr)) & zero_page_mask))))
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#define pgtable_cache_init() do {} while (0)
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#define arch_enter_lazy_cpu_mode() do {} while (0)
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static inline int pte_write(pte_t pte)
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{
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return pte_val(pte) & _PAGE_WRITE;
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}
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static inline int pte_dirty(pte_t pte)
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{
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return pte_val(pte) & _PAGE_MODIFIED;
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}
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static inline int pte_young(pte_t pte)
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{
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return pte_val(pte) & _PAGE_ACCESSED;
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}
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#define pte_special(pte) (0)
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static inline pte_t pte_wrprotect(pte_t pte)
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{
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pte_val(pte) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE);
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return pte;
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}
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static inline pte_t pte_mkclean(pte_t pte)
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{
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pte_val(pte) &= ~(_PAGE_MODIFIED|_PAGE_SILENT_WRITE);
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return pte;
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}
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static inline pte_t pte_mkold(pte_t pte)
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{
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pte_val(pte) &= ~(_PAGE_ACCESSED|_PAGE_SILENT_READ);
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return pte;
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}
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static inline pte_t pte_mkwrite(pte_t pte)
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{
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pte_val(pte) |= _PAGE_WRITE;
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if (pte_val(pte) & _PAGE_MODIFIED)
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pte_val(pte) |= _PAGE_SILENT_WRITE;
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return pte;
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}
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static inline pte_t pte_mkdirty(pte_t pte)
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{
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pte_val(pte) |= _PAGE_MODIFIED;
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if (pte_val(pte) & _PAGE_WRITE)
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pte_val(pte) |= _PAGE_SILENT_WRITE;
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return pte;
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}
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static inline pte_t pte_mkyoung(pte_t pte)
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{
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pte_val(pte) |= _PAGE_ACCESSED;
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if (pte_val(pte) & _PAGE_READ)
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pte_val(pte) |= _PAGE_SILENT_READ;
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return pte;
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}
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#define set_pmd(pmdptr, pmdval) \
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do { *(pmdptr) = (pmdval); } while (0)
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#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT)
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extern unsigned long pgd_current;
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extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
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extern void paging_init(void);
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static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
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{
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return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
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}
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extern void __update_tlb(struct vm_area_struct *vma,
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unsigned long address, pte_t pte);
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extern void __update_cache(struct vm_area_struct *vma,
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unsigned long address, pte_t pte);
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static inline void update_mmu_cache(struct vm_area_struct *vma,
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unsigned long address, pte_t *ptep)
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{
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pte_t pte = *ptep;
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__update_tlb(vma, address, pte);
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__update_cache(vma, address, pte);
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}
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#ifndef __ASSEMBLY__
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#include <asm-generic/pgtable.h>
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void setup_memory(void);
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_SCORE_PGTABLE_H */
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