| /* |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| * |
| * Copyright (C) 1994 - 1999, 2000, 03 Ralf Baechle |
| * Copyright (C) 1999, 2000 Silicon Graphics, Inc. |
| */ |
| #ifndef _ASM_PAGE_H |
| #define _ASM_PAGE_H |
| |
| #include <spaces.h> |
| #include <linux/const.h> |
| #include <linux/kernel.h> |
| #include <asm/mipsregs.h> |
| |
| /* |
| * PAGE_SHIFT determines the page size |
| */ |
| #ifdef CONFIG_PAGE_SIZE_4KB |
| #define PAGE_SHIFT 12 |
| #endif |
| #ifdef CONFIG_PAGE_SIZE_8KB |
| #define PAGE_SHIFT 13 |
| #endif |
| #ifdef CONFIG_PAGE_SIZE_16KB |
| #define PAGE_SHIFT 14 |
| #endif |
| #ifdef CONFIG_PAGE_SIZE_32KB |
| #define PAGE_SHIFT 15 |
| #endif |
| #ifdef CONFIG_PAGE_SIZE_64KB |
| #define PAGE_SHIFT 16 |
| #endif |
| #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) |
| #define PAGE_MASK (~((1 << PAGE_SHIFT) - 1)) |
| |
| /* |
| * This is used for calculating the real page sizes |
| * for FTLB or VTLB + FTLB configurations. |
| */ |
| static inline unsigned int page_size_ftlb(unsigned int mmuextdef) |
| { |
| switch (mmuextdef) { |
| case MIPS_CONF4_MMUEXTDEF_FTLBSIZEEXT: |
| if (PAGE_SIZE == (1 << 30)) |
| return 5; |
| if (PAGE_SIZE == (1llu << 32)) |
| return 6; |
| if (PAGE_SIZE > (256 << 10)) |
| return 7; /* reserved */ |
| /* fall through */ |
| case MIPS_CONF4_MMUEXTDEF_VTLBSIZEEXT: |
| return (PAGE_SHIFT - 10) / 2; |
| default: |
| panic("Invalid FTLB configuration with Conf4_mmuextdef=%d value\n", |
| mmuextdef >> 14); |
| } |
| } |
| |
| #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT |
| #define HPAGE_SHIFT (PAGE_SHIFT + PAGE_SHIFT - 3) |
| #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) |
| #define HPAGE_MASK (~(HPAGE_SIZE - 1)) |
| #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) |
| #else /* !CONFIG_MIPS_HUGE_TLB_SUPPORT */ |
| #define HPAGE_SHIFT ({BUILD_BUG(); 0; }) |
| #define HPAGE_SIZE ({BUILD_BUG(); 0; }) |
| #define HPAGE_MASK ({BUILD_BUG(); 0; }) |
| #define HUGETLB_PAGE_ORDER ({BUILD_BUG(); 0; }) |
| #endif /* CONFIG_MIPS_HUGE_TLB_SUPPORT */ |
| |
| #include <linux/pfn.h> |
| |
| extern void build_clear_page(void); |
| extern void build_copy_page(void); |
| |
| /* |
| * It's normally defined only for FLATMEM config but it's |
| * used in our early mem init code for all memory models. |
| * So always define it. |
| */ |
| #ifdef CONFIG_MIPS_AUTO_PFN_OFFSET |
| extern unsigned long ARCH_PFN_OFFSET; |
| # define ARCH_PFN_OFFSET ARCH_PFN_OFFSET |
| #else |
| # define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET) |
| #endif |
| |
| extern void clear_page(void * page); |
| extern void copy_page(void * to, void * from); |
| |
| extern unsigned long shm_align_mask; |
| |
| static inline unsigned long pages_do_alias(unsigned long addr1, |
| unsigned long addr2) |
| { |
| return (addr1 ^ addr2) & shm_align_mask; |
| } |
| |
| struct page; |
| |
| static inline void clear_user_page(void *addr, unsigned long vaddr, |
| struct page *page) |
| { |
| extern void (*flush_data_cache_page)(unsigned long addr); |
| |
| clear_page(addr); |
| if (pages_do_alias((unsigned long) addr, vaddr & PAGE_MASK)) |
| flush_data_cache_page((unsigned long)addr); |
| } |
| |
| struct vm_area_struct; |
| extern void copy_user_highpage(struct page *to, struct page *from, |
| unsigned long vaddr, struct vm_area_struct *vma); |
| |
| #define __HAVE_ARCH_COPY_USER_HIGHPAGE |
| |
| /* |
| * These are used to make use of C type-checking.. |
| */ |
| #ifdef CONFIG_PHYS_ADDR_T_64BIT |
| #ifdef CONFIG_CPU_MIPS32 |
| typedef struct { unsigned long pte_low, pte_high; } pte_t; |
| #define pte_val(x) ((x).pte_low | ((unsigned long long)(x).pte_high << 32)) |
| #define __pte(x) ({ pte_t __pte = {(x), ((unsigned long long)(x)) >> 32}; __pte; }) |
| #else |
| typedef struct { unsigned long long pte; } pte_t; |
| #define pte_val(x) ((x).pte) |
| #define __pte(x) ((pte_t) { (x) } ) |
| #endif |
| #else |
| typedef struct { unsigned long pte; } pte_t; |
| #define pte_val(x) ((x).pte) |
| #define __pte(x) ((pte_t) { (x) } ) |
| #endif |
| typedef struct page *pgtable_t; |
| |
| /* |
| * Right now we don't support 4-level pagetables, so all pud-related |
| * definitions come from <asm-generic/pgtable-nopud.h>. |
| */ |
| |
| /* |
| * Finall the top of the hierarchy, the pgd |
| */ |
| typedef struct { unsigned long pgd; } pgd_t; |
| #define pgd_val(x) ((x).pgd) |
| #define __pgd(x) ((pgd_t) { (x) } ) |
| |
| /* |
| * Manipulate page protection bits |
| */ |
| typedef struct { unsigned long pgprot; } pgprot_t; |
| #define pgprot_val(x) ((x).pgprot) |
| #define __pgprot(x) ((pgprot_t) { (x) } ) |
| #define pte_pgprot(x) __pgprot(pte_val(x) & ~_PFN_MASK) |
| |
| /* |
| * On R4000-style MMUs where a TLB entry is mapping a adjacent even / odd |
| * pair of pages we only have a single global bit per pair of pages. When |
| * writing to the TLB make sure we always have the bit set for both pages |
| * or none. This macro is used to access the `buddy' of the pte we're just |
| * working on. |
| */ |
| #define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t))) |
| |
| /* |
| * __pa()/__va() should be used only during mem init. |
| */ |
| static inline unsigned long ___pa(unsigned long x) |
| { |
| if (IS_ENABLED(CONFIG_64BIT)) { |
| /* |
| * For MIPS64 the virtual address may either be in one of |
| * the compatibility segements ckseg0 or ckseg1, or it may |
| * be in xkphys. |
| */ |
| return x < CKSEG0 ? XPHYSADDR(x) : CPHYSADDR(x); |
| } |
| |
| if (!IS_ENABLED(CONFIG_EVA)) { |
| /* |
| * We're using the standard MIPS32 legacy memory map, ie. |
| * the address x is going to be in kseg0 or kseg1. We can |
| * handle either case by masking out the desired bits using |
| * CPHYSADDR. |
| */ |
| return CPHYSADDR(x); |
| } |
| |
| /* |
| * EVA is in use so the memory map could be anything, making it not |
| * safe to just mask out bits. |
| */ |
| return x - PAGE_OFFSET + PHYS_OFFSET; |
| } |
| #define __pa(x) ___pa((unsigned long)(x)) |
| #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET)) |
| #include <asm/io.h> |
| |
| /* |
| * RELOC_HIDE was originally added by 6007b903dfe5f1d13e0c711ac2894bdd4a61b1ad |
| * (lmo) rsp. 8431fd094d625b94d364fe393076ccef88e6ce18 (kernel.org). The |
| * discussion can be found in lkml posting |
| * <a2ebde260608230500o3407b108hc03debb9da6e62c@mail.gmail.com> which is |
| * archived at http://lists.linuxcoding.com/kernel/2006-q3/msg17360.html |
| * |
| * It is unclear if the misscompilations mentioned in |
| * http://lkml.org/lkml/2010/8/8/138 also affect MIPS so we keep this one |
| * until GCC 3.x has been retired before we can apply |
| * https://patchwork.linux-mips.org/patch/1541/ |
| */ |
| |
| #ifndef __pa_symbol |
| #define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0)) |
| #endif |
| |
| #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) |
| |
| #ifdef CONFIG_FLATMEM |
| |
| static inline int pfn_valid(unsigned long pfn) |
| { |
| /* avoid <linux/mm.h> include hell */ |
| extern unsigned long max_mapnr; |
| unsigned long pfn_offset = ARCH_PFN_OFFSET; |
| |
| return pfn >= pfn_offset && pfn < max_mapnr; |
| } |
| |
| #elif defined(CONFIG_SPARSEMEM) |
| |
| /* pfn_valid is defined in linux/mmzone.h */ |
| |
| #elif defined(CONFIG_NEED_MULTIPLE_NODES) |
| |
| #define pfn_valid(pfn) \ |
| ({ \ |
| unsigned long __pfn = (pfn); \ |
| int __n = pfn_to_nid(__pfn); \ |
| ((__n >= 0) ? (__pfn < NODE_DATA(__n)->node_start_pfn + \ |
| NODE_DATA(__n)->node_spanned_pages) \ |
| : 0); \ |
| }) |
| |
| #endif |
| |
| #define virt_to_pfn(kaddr) PFN_DOWN(virt_to_phys((void *)(kaddr))) |
| #define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) |
| |
| extern int __virt_addr_valid(const volatile void *kaddr); |
| #define virt_addr_valid(kaddr) \ |
| __virt_addr_valid((const volatile void *) (kaddr)) |
| |
| #define VM_DATA_DEFAULT_FLAGS \ |
| (VM_READ | VM_WRITE | \ |
| ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \ |
| VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
| |
| #define UNCAC_ADDR(addr) (UNCAC_BASE + __pa(addr)) |
| #define CAC_ADDR(addr) ((unsigned long)__va((addr) - UNCAC_BASE)) |
| |
| #include <asm-generic/memory_model.h> |
| #include <asm-generic/getorder.h> |
| |
| #endif /* _ASM_PAGE_H */ |