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Diffstat (limited to 'arch/sparc/include/asm/page_64.h')
| -rw-r--r-- | arch/sparc/include/asm/page_64.h | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/page_64.h b/arch/sparc/include/asm/page_64.h new file mode 100644 index 000000000..e80f2d5bf --- /dev/null +++ b/arch/sparc/include/asm/page_64.h @@ -0,0 +1,166 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _SPARC64_PAGE_H +#define _SPARC64_PAGE_H + +#include <linux/const.h> + +#define PAGE_SHIFT 13 + +#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) +#define PAGE_MASK (~(PAGE_SIZE-1)) + +/* Flushing for D-cache alias handling is only needed if + * the page size is smaller than 16K. + */ +#if PAGE_SHIFT < 14 +#define DCACHE_ALIASING_POSSIBLE +#endif + +#define HPAGE_SHIFT 23 +#define REAL_HPAGE_SHIFT 22 +#define HPAGE_16GB_SHIFT 34 +#define HPAGE_2GB_SHIFT 31 +#define HPAGE_256MB_SHIFT 28 +#define HPAGE_64K_SHIFT 16 +#define REAL_HPAGE_SIZE (_AC(1,UL) << REAL_HPAGE_SHIFT) + +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) +#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) +#define HPAGE_MASK (~(HPAGE_SIZE - 1UL)) +#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) +#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA +#define REAL_HPAGE_PER_HPAGE (_AC(1,UL) << (HPAGE_SHIFT - REAL_HPAGE_SHIFT)) +#define HUGE_MAX_HSTATE 5 +#endif + +#ifndef __ASSEMBLY__ + +#if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) +struct pt_regs; +void hugetlb_setup(struct pt_regs *regs); +#endif + +#define WANT_PAGE_VIRTUAL + +void _clear_page(void *page); +#define clear_page(X) _clear_page((void *)(X)) +struct page; +void clear_user_page(void *addr, unsigned long vaddr, struct page *page); +#define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE) +void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage); +#define __HAVE_ARCH_COPY_USER_HIGHPAGE +struct vm_area_struct; +void copy_user_highpage(struct page *to, struct page *from, + unsigned long vaddr, struct vm_area_struct *vma); +#define __HAVE_ARCH_COPY_HIGHPAGE +void copy_highpage(struct page *to, struct page *from); + +/* Unlike sparc32, sparc64's parameter passing API is more + * sane in that structures which as small enough are passed + * in registers instead of on the stack. Thus, setting + * STRICT_MM_TYPECHECKS does not generate worse code so + * let's enable it to get the type checking. + */ + +#define STRICT_MM_TYPECHECKS + +#ifdef STRICT_MM_TYPECHECKS +/* These are used to make use of C type-checking.. */ +typedef struct { unsigned long pte; } pte_t; +typedef struct { unsigned long iopte; } iopte_t; +typedef struct { unsigned long pmd; } pmd_t; +typedef struct { unsigned long pud; } pud_t; +typedef struct { unsigned long pgd; } pgd_t; +typedef struct { unsigned long pgprot; } pgprot_t; + +#define pte_val(x) ((x).pte) +#define iopte_val(x) ((x).iopte) +#define pmd_val(x) ((x).pmd) +#define pud_val(x) ((x).pud) +#define pgd_val(x) ((x).pgd) +#define pgprot_val(x) ((x).pgprot) + +#define __pte(x) ((pte_t) { (x) } ) +#define __iopte(x) ((iopte_t) { (x) } ) +#define __pmd(x) ((pmd_t) { (x) } ) +#define __pud(x) ((pud_t) { (x) } ) +#define __pgd(x) ((pgd_t) { (x) } ) +#define __pgprot(x) ((pgprot_t) { (x) } ) + +#else +/* .. while these make it easier on the compiler */ +typedef unsigned long pte_t; +typedef unsigned long iopte_t; +typedef unsigned long pmd_t; +typedef unsigned long pud_t; +typedef unsigned long pgd_t; +typedef unsigned long pgprot_t; + +#define pte_val(x) (x) +#define iopte_val(x) (x) +#define pmd_val(x) (x) +#define pud_val(x) (x) +#define pgd_val(x) (x) +#define pgprot_val(x) (x) + +#define __pte(x) (x) +#define __iopte(x) (x) +#define __pmd(x) (x) +#define __pud(x) (x) +#define __pgd(x) (x) +#define __pgprot(x) (x) + +#endif /* (STRICT_MM_TYPECHECKS) */ + +typedef pte_t *pgtable_t; + +extern unsigned long sparc64_va_hole_top; +extern unsigned long sparc64_va_hole_bottom; + +/* The next two defines specify the actual exclusion region we + * enforce, wherein we use a 4GB red zone on each side of the VA hole. + */ +#define VA_EXCLUDE_START (sparc64_va_hole_bottom - (1UL << 32UL)) +#define VA_EXCLUDE_END (sparc64_va_hole_top + (1UL << 32UL)) + +#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \ + _AC(0x0000000070000000,UL) : \ + VA_EXCLUDE_END) + +#include <asm-generic/memory_model.h> + +extern unsigned long PAGE_OFFSET; + +#endif /* !(__ASSEMBLY__) */ + +/* The maximum number of physical memory address bits we support. The + * largest value we can support is whatever "KPGD_SHIFT + KPTE_BITS" + * evaluates to. + */ +#define MAX_PHYS_ADDRESS_BITS 53 + +#define ILOG2_4MB 22 +#define ILOG2_256MB 28 + +#ifndef __ASSEMBLY__ + +#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET) +#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET)) + +#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) + +#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT) + +#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) + +#define virt_to_phys __pa +#define phys_to_virt __va + +#endif /* !(__ASSEMBLY__) */ + +#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ + VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) + +#include <asm-generic/getorder.h> + +#endif /* _SPARC64_PAGE_H */ |