diff options
Diffstat (limited to 'arch/loongarch/mm/pgtable.c')
| -rw-r--r-- | arch/loongarch/mm/pgtable.c | 40 |
1 files changed, 31 insertions, 9 deletions
diff --git a/arch/loongarch/mm/pgtable.c b/arch/loongarch/mm/pgtable.c index b14343e211b6..352d9b2e02ab 100644 --- a/arch/loongarch/mm/pgtable.c +++ b/arch/loongarch/mm/pgtable.c @@ -9,13 +9,24 @@ #include <asm/pgtable.h> #include <asm/tlbflush.h> +struct page *dmw_virt_to_page(unsigned long kaddr) +{ + return phys_to_page(__pa(kaddr)); +} +EXPORT_SYMBOL(dmw_virt_to_page); + +struct page *tlb_virt_to_page(unsigned long kaddr) +{ + return phys_to_page(pfn_to_phys(pte_pfn(*virt_to_kpte(kaddr)))); +} +EXPORT_SYMBOL(tlb_virt_to_page); + pgd_t *pgd_alloc(struct mm_struct *mm) { - pgd_t *init, *ret = NULL; - struct ptdesc *ptdesc = pagetable_alloc(GFP_KERNEL & ~__GFP_HIGHMEM, 0); + pgd_t *init, *ret; - if (ptdesc) { - ret = (pgd_t *)ptdesc_address(ptdesc); + ret = __pgd_alloc(mm, 0); + if (ret) { init = pgd_offset(&init_mm, 0UL); pgd_init(ret); memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD, @@ -104,19 +115,30 @@ void pud_init(void *addr) EXPORT_SYMBOL_GPL(pud_init); #endif -pmd_t mk_pmd(struct page *page, pgprot_t prot) +void kernel_pte_init(void *addr) { - pmd_t pmd; + unsigned long *p, *end; - pmd_val(pmd) = (page_to_pfn(page) << PFN_PTE_SHIFT) | pgprot_val(prot); + p = (unsigned long *)addr; + end = p + PTRS_PER_PTE; - return pmd; + do { + p[0] = _PAGE_GLOBAL; + p[1] = _PAGE_GLOBAL; + p[2] = _PAGE_GLOBAL; + p[3] = _PAGE_GLOBAL; + p[4] = _PAGE_GLOBAL; + p += 8; + p[-3] = _PAGE_GLOBAL; + p[-2] = _PAGE_GLOBAL; + p[-1] = _PAGE_GLOBAL; + } while (p != end); } void set_pmd_at(struct mm_struct *mm, unsigned long addr, pmd_t *pmdp, pmd_t pmd) { - *pmdp = pmd; + WRITE_ONCE(*pmdp, pmd); flush_tlb_all(); } |