| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * S390 version |
| * Copyright IBM Corp. 1999, 2000 |
| * Author(s): Hartmut Penner (hp@de.ibm.com) |
| */ |
| |
| #ifndef _S390_PAGE_H |
| #define _S390_PAGE_H |
| |
| #include <linux/const.h> |
| #include <asm/types.h> |
| |
| #define _PAGE_SHIFT 12 |
| #define _PAGE_SIZE (_AC(1, UL) << _PAGE_SHIFT) |
| #define _PAGE_MASK (~(_PAGE_SIZE - 1)) |
| |
| /* PAGE_SHIFT determines the page size */ |
| #define PAGE_SHIFT _PAGE_SHIFT |
| #define PAGE_SIZE _PAGE_SIZE |
| #define PAGE_MASK _PAGE_MASK |
| #define PAGE_DEFAULT_ACC 0 |
| /* storage-protection override */ |
| #define PAGE_SPO_ACC 9 |
| #define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4) |
| |
| #define HPAGE_SHIFT 20 |
| #define HPAGE_SIZE (1UL << HPAGE_SHIFT) |
| #define HPAGE_MASK (~(HPAGE_SIZE - 1)) |
| #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) |
| #define HUGE_MAX_HSTATE 2 |
| |
| #define ARCH_HAS_SETCLEAR_HUGE_PTE |
| #define ARCH_HAS_HUGE_PTE_TYPE |
| #define ARCH_HAS_PREPARE_HUGEPAGE |
| #define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH |
| |
| #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA |
| |
| #include <asm/setup.h> |
| #ifndef __ASSEMBLY__ |
| |
| void __storage_key_init_range(unsigned long start, unsigned long end); |
| |
| static inline void storage_key_init_range(unsigned long start, unsigned long end) |
| { |
| if (PAGE_DEFAULT_KEY != 0) |
| __storage_key_init_range(start, end); |
| } |
| |
| #define clear_page(page) memset((page), 0, PAGE_SIZE) |
| |
| /* |
| * copy_page uses the mvcl instruction with 0xb0 padding byte in order to |
| * bypass caches when copying a page. Especially when copying huge pages |
| * this keeps L1 and L2 data caches alive. |
| */ |
| static inline void copy_page(void *to, void *from) |
| { |
| union register_pair dst, src; |
| |
| dst.even = (unsigned long) to; |
| dst.odd = 0x1000; |
| src.even = (unsigned long) from; |
| src.odd = 0xb0001000; |
| |
| asm volatile( |
| " mvcl %[dst],%[src]" |
| : [dst] "+&d" (dst.pair), [src] "+&d" (src.pair) |
| : : "memory", "cc"); |
| } |
| |
| #define clear_user_page(page, vaddr, pg) clear_page(page) |
| #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) |
| |
| #define vma_alloc_zeroed_movable_folio(vma, vaddr) \ |
| vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr, false) |
| |
| /* |
| * These are used to make use of C type-checking.. |
| */ |
| |
| typedef struct { unsigned long pgprot; } pgprot_t; |
| typedef struct { unsigned long pgste; } pgste_t; |
| typedef struct { unsigned long pte; } pte_t; |
| typedef struct { unsigned long pmd; } pmd_t; |
| typedef struct { unsigned long pud; } pud_t; |
| typedef struct { unsigned long p4d; } p4d_t; |
| typedef struct { unsigned long pgd; } pgd_t; |
| typedef pte_t *pgtable_t; |
| |
| #define pgprot_val(x) ((x).pgprot) |
| #define pgste_val(x) ((x).pgste) |
| |
| static inline unsigned long pte_val(pte_t pte) |
| { |
| return pte.pte; |
| } |
| |
| static inline unsigned long pmd_val(pmd_t pmd) |
| { |
| return pmd.pmd; |
| } |
| |
| static inline unsigned long pud_val(pud_t pud) |
| { |
| return pud.pud; |
| } |
| |
| static inline unsigned long p4d_val(p4d_t p4d) |
| { |
| return p4d.p4d; |
| } |
| |
| static inline unsigned long pgd_val(pgd_t pgd) |
| { |
| return pgd.pgd; |
| } |
| |
| #define __pgste(x) ((pgste_t) { (x) } ) |
| #define __pte(x) ((pte_t) { (x) } ) |
| #define __pmd(x) ((pmd_t) { (x) } ) |
| #define __pud(x) ((pud_t) { (x) } ) |
| #define __p4d(x) ((p4d_t) { (x) } ) |
| #define __pgd(x) ((pgd_t) { (x) } ) |
| #define __pgprot(x) ((pgprot_t) { (x) } ) |
| |
| static inline void page_set_storage_key(unsigned long addr, |
| unsigned char skey, int mapped) |
| { |
| if (!mapped) |
| asm volatile(".insn rrf,0xb22b0000,%0,%1,8,0" |
| : : "d" (skey), "a" (addr)); |
| else |
| asm volatile("sske %0,%1" : : "d" (skey), "a" (addr)); |
| } |
| |
| static inline unsigned char page_get_storage_key(unsigned long addr) |
| { |
| unsigned char skey; |
| |
| asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr)); |
| return skey; |
| } |
| |
| static inline int page_reset_referenced(unsigned long addr) |
| { |
| int cc; |
| |
| asm volatile( |
| " rrbe 0,%1\n" |
| " ipm %0\n" |
| " srl %0,28\n" |
| : "=d" (cc) : "a" (addr) : "cc"); |
| return cc; |
| } |
| |
| /* Bits int the storage key */ |
| #define _PAGE_CHANGED 0x02 /* HW changed bit */ |
| #define _PAGE_REFERENCED 0x04 /* HW referenced bit */ |
| #define _PAGE_FP_BIT 0x08 /* HW fetch protection bit */ |
| #define _PAGE_ACC_BITS 0xf0 /* HW access control bits */ |
| |
| struct page; |
| void arch_free_page(struct page *page, int order); |
| void arch_alloc_page(struct page *page, int order); |
| void arch_set_page_dat(struct page *page, int order); |
| |
| static inline int devmem_is_allowed(unsigned long pfn) |
| { |
| return 0; |
| } |
| |
| #define HAVE_ARCH_FREE_PAGE |
| #define HAVE_ARCH_ALLOC_PAGE |
| |
| #if IS_ENABLED(CONFIG_PGSTE) |
| int arch_make_page_accessible(struct page *page); |
| #define HAVE_ARCH_MAKE_PAGE_ACCESSIBLE |
| #endif |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| #define __PAGE_OFFSET 0x0UL |
| #define PAGE_OFFSET 0x0UL |
| |
| #define __pa(x) ((unsigned long)(x)) |
| #define __va(x) ((void *)(unsigned long)(x)) |
| |
| #define phys_to_pfn(phys) ((phys) >> PAGE_SHIFT) |
| #define pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT) |
| |
| #define phys_to_page(phys) pfn_to_page(phys_to_pfn(phys)) |
| #define page_to_phys(page) pfn_to_phys(page_to_pfn(page)) |
| |
| #define pfn_to_virt(pfn) __va(pfn_to_phys(pfn)) |
| #define virt_to_pfn(kaddr) (phys_to_pfn(__pa(kaddr))) |
| #define pfn_to_kaddr(pfn) pfn_to_virt(pfn) |
| |
| #define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) |
| #define page_to_virt(page) pfn_to_virt(page_to_pfn(page)) |
| |
| #define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr)) |
| |
| #define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC |
| |
| #include <asm-generic/memory_model.h> |
| #include <asm-generic/getorder.h> |
| |
| #endif /* _S390_PAGE_H */ |