From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- arch/arc/include/asm/page.h | 118 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 118 insertions(+) create mode 100644 arch/arc/include/asm/page.h (limited to 'arch/arc/include/asm/page.h') diff --git a/arch/arc/include/asm/page.h b/arch/arc/include/asm/page.h new file mode 100644 index 000000000..a70fef79c --- /dev/null +++ b/arch/arc/include/asm/page.h @@ -0,0 +1,118 @@ +/* + * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef __ASM_ARC_PAGE_H +#define __ASM_ARC_PAGE_H + +#include + +#ifndef __ASSEMBLY__ + +#define clear_page(paddr) memset((paddr), 0, PAGE_SIZE) +#define copy_user_page(to, from, vaddr, pg) copy_page(to, from) +#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) + +struct vm_area_struct; +struct page; + +#define __HAVE_ARCH_COPY_USER_HIGHPAGE + +void copy_user_highpage(struct page *to, struct page *from, + unsigned long u_vaddr, struct vm_area_struct *vma); +void clear_user_page(void *to, unsigned long u_vaddr, struct page *page); + +#undef STRICT_MM_TYPECHECKS + +#ifdef STRICT_MM_TYPECHECKS +/* + * These are used to make use of C type-checking.. + */ +typedef struct { +#ifdef CONFIG_ARC_HAS_PAE40 + unsigned long long pte; +#else + unsigned long pte; +#endif +} pte_t; +typedef struct { + unsigned long pgd; +} pgd_t; +typedef struct { + unsigned long pgprot; +} pgprot_t; + +#define pte_val(x) ((x).pte) +#define pgd_val(x) ((x).pgd) +#define pgprot_val(x) ((x).pgprot) + +#define __pte(x) ((pte_t) { (x) }) +#define __pgd(x) ((pgd_t) { (x) }) +#define __pgprot(x) ((pgprot_t) { (x) }) + +#define pte_pgprot(x) __pgprot(pte_val(x)) + +#else /* !STRICT_MM_TYPECHECKS */ + +#ifdef CONFIG_ARC_HAS_PAE40 +typedef unsigned long long pte_t; +#else +typedef unsigned long pte_t; +#endif +typedef unsigned long pgd_t; +typedef unsigned long pgprot_t; + +#define pte_val(x) (x) +#define pgd_val(x) (x) +#define pgprot_val(x) (x) +#define __pte(x) (x) +#define __pgd(x) (x) +#define __pgprot(x) (x) +#define pte_pgprot(x) (x) + +#endif + +typedef pte_t * pgtable_t; + +/* + * Use virt_to_pfn with caution: + * If used in pte or paddr related macros, it could cause truncation + * in PAE40 builds + * As a rule of thumb, only use it in helpers starting with virt_ + * You have been warned ! + */ +#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) + +#define ARCH_PFN_OFFSET virt_to_pfn(CONFIG_LINUX_RAM_BASE) + +#ifdef CONFIG_FLATMEM +#define pfn_valid(pfn) (((pfn) - ARCH_PFN_OFFSET) < max_mapnr) +#endif + +/* + * __pa, __va, virt_to_page (ALERT: deprecated, don't use them) + * + * These macros have historically been misnamed + * virt here means link-address/program-address as embedded in object code. + * And for ARC, link-addr = physical address + */ +#define __pa(vaddr) ((unsigned long)(vaddr)) +#define __va(paddr) ((void *)((unsigned long)(paddr))) + +#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) +#define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr)) + +/* Default Permissions for stack/heaps pages (Non Executable) */ +#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) + +#define WANT_PAGE_VIRTUAL 1 + +#include /* page_to_pfn, pfn_to_page */ +#include + +#endif /* !__ASSEMBLY__ */ + +#endif -- cgit v1.2.3