cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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page.h (3313B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
      4 */
      5#ifndef __ASM_ARC_PAGE_H
      6#define __ASM_ARC_PAGE_H
      7
      8#include <uapi/asm/page.h>
      9
     10#ifdef CONFIG_ARC_HAS_PAE40
     11
     12#define MAX_POSSIBLE_PHYSMEM_BITS	40
     13#define PAGE_MASK_PHYS			(0xff00000000ull | PAGE_MASK)
     14
     15#else /* CONFIG_ARC_HAS_PAE40 */
     16
     17#define MAX_POSSIBLE_PHYSMEM_BITS	32
     18#define PAGE_MASK_PHYS			PAGE_MASK
     19
     20#endif /* CONFIG_ARC_HAS_PAE40 */
     21
     22#ifndef __ASSEMBLY__
     23
     24#define clear_page(paddr)		memset((paddr), 0, PAGE_SIZE)
     25#define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)
     26#define copy_page(to, from)		memcpy((to), (from), PAGE_SIZE)
     27
     28struct vm_area_struct;
     29struct page;
     30
     31#define __HAVE_ARCH_COPY_USER_HIGHPAGE
     32
     33void copy_user_highpage(struct page *to, struct page *from,
     34			unsigned long u_vaddr, struct vm_area_struct *vma);
     35void clear_user_page(void *to, unsigned long u_vaddr, struct page *page);
     36
     37typedef struct {
     38	unsigned long pgd;
     39} pgd_t;
     40
     41#define pgd_val(x)	((x).pgd)
     42#define __pgd(x)	((pgd_t) { (x) })
     43
     44#if CONFIG_PGTABLE_LEVELS > 3
     45
     46typedef struct {
     47	unsigned long pud;
     48} pud_t;
     49
     50#define pud_val(x)      	((x).pud)
     51#define __pud(x)        	((pud_t) { (x) })
     52
     53#endif
     54
     55#if CONFIG_PGTABLE_LEVELS > 2
     56
     57typedef struct {
     58	unsigned long pmd;
     59} pmd_t;
     60
     61#define pmd_val(x)	((x).pmd)
     62#define __pmd(x)	((pmd_t) { (x) })
     63
     64#endif
     65
     66typedef struct {
     67#ifdef CONFIG_ARC_HAS_PAE40
     68	unsigned long long pte;
     69#else
     70	unsigned long pte;
     71#endif
     72} pte_t;
     73
     74#define pte_val(x)	((x).pte)
     75#define __pte(x)	((pte_t) { (x) })
     76
     77typedef struct {
     78	unsigned long pgprot;
     79} pgprot_t;
     80
     81#define pgprot_val(x)	((x).pgprot)
     82#define __pgprot(x)	((pgprot_t) { (x) })
     83#define pte_pgprot(x)	__pgprot(pte_val(x))
     84
     85typedef struct page *pgtable_t;
     86
     87/*
     88 * Use virt_to_pfn with caution:
     89 * If used in pte or paddr related macros, it could cause truncation
     90 * in PAE40 builds
     91 * As a rule of thumb, only use it in helpers starting with virt_
     92 * You have been warned !
     93 */
     94#define virt_to_pfn(kaddr)	(__pa(kaddr) >> PAGE_SHIFT)
     95
     96/*
     97 * When HIGHMEM is enabled we have holes in the memory map so we need
     98 * pfn_valid() that takes into account the actual extents of the physical
     99 * memory
    100 */
    101#ifdef CONFIG_HIGHMEM
    102
    103extern unsigned long arch_pfn_offset;
    104#define ARCH_PFN_OFFSET		arch_pfn_offset
    105
    106extern int pfn_valid(unsigned long pfn);
    107#define pfn_valid		pfn_valid
    108
    109#else /* CONFIG_HIGHMEM */
    110
    111#define ARCH_PFN_OFFSET		virt_to_pfn(CONFIG_LINUX_RAM_BASE)
    112#define pfn_valid(pfn)		(((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
    113
    114#endif /* CONFIG_HIGHMEM */
    115
    116/*
    117 * __pa, __va, virt_to_page (ALERT: deprecated, don't use them)
    118 *
    119 * These macros have historically been misnamed
    120 * virt here means link-address/program-address as embedded in object code.
    121 * And for ARC, link-addr = physical address
    122 */
    123#define __pa(vaddr)  		((unsigned long)(vaddr))
    124#define __va(paddr)  		((void *)((unsigned long)(paddr)))
    125
    126#define virt_to_page(kaddr)	pfn_to_page(virt_to_pfn(kaddr))
    127#define virt_addr_valid(kaddr)  pfn_valid(virt_to_pfn(kaddr))
    128
    129/* Default Permissions for stack/heaps pages (Non Executable) */
    130#define VM_DATA_DEFAULT_FLAGS	VM_DATA_FLAGS_NON_EXEC
    131
    132#define WANT_PAGE_VIRTUAL   1
    133
    134#include <asm-generic/memory_model.h>   /* page_to_pfn, pfn_to_page */
    135#include <asm-generic/getorder.h>
    136
    137#endif /* !__ASSEMBLY__ */
    138
    139#endif