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 (3239B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
      4 * Copyright 2003 PathScale, Inc.
      5 */
      6
      7#ifndef __UM_PAGE_H
      8#define __UM_PAGE_H
      9
     10#include <linux/const.h>
     11
     12/* PAGE_SHIFT determines the page size */
     13#define PAGE_SHIFT	12
     14#define PAGE_SIZE	(_AC(1, UL) << PAGE_SHIFT)
     15#define PAGE_MASK	(~(PAGE_SIZE-1))
     16
     17#ifndef __ASSEMBLY__
     18
     19struct page;
     20
     21#include <linux/pfn.h>
     22#include <linux/types.h>
     23#include <asm/vm-flags.h>
     24
     25/*
     26 * These are used to make use of C type-checking..
     27 */
     28
     29#define clear_page(page)	memset((void *)(page), 0, PAGE_SIZE)
     30#define copy_page(to,from)	memcpy((void *)(to), (void *)(from), PAGE_SIZE)
     31
     32#define clear_user_page(page, vaddr, pg)	clear_page(page)
     33#define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)
     34
     35#if defined(CONFIG_3_LEVEL_PGTABLES) && !defined(CONFIG_64BIT)
     36
     37typedef struct { unsigned long pte; } pte_t;
     38typedef struct { unsigned long pmd; } pmd_t;
     39typedef struct { unsigned long pgd; } pgd_t;
     40#define pte_val(p) ((p).pte)
     41
     42#define pte_get_bits(p, bits) ((p).pte & (bits))
     43#define pte_set_bits(p, bits) ((p).pte |= (bits))
     44#define pte_clear_bits(p, bits) ((p).pte &= ~(bits))
     45#define pte_copy(to, from) ({ (to).pte = (from).pte; })
     46#define pte_is_zero(p) (!((p).pte & ~_PAGE_NEWPAGE))
     47#define pte_set_val(p, phys, prot) \
     48	({ (p).pte = (phys) | pgprot_val(prot); })
     49
     50#define pmd_val(x)	((x).pmd)
     51#define __pmd(x) ((pmd_t) { (x) } )
     52
     53typedef unsigned long long phys_t;
     54
     55#else
     56
     57typedef struct { unsigned long pte; } pte_t;
     58typedef struct { unsigned long pgd; } pgd_t;
     59
     60#ifdef CONFIG_3_LEVEL_PGTABLES
     61typedef struct { unsigned long pmd; } pmd_t;
     62#define pmd_val(x)	((x).pmd)
     63#define __pmd(x) ((pmd_t) { (x) } )
     64#endif
     65
     66#define pte_val(x)	((x).pte)
     67
     68
     69#define pte_get_bits(p, bits) ((p).pte & (bits))
     70#define pte_set_bits(p, bits) ((p).pte |= (bits))
     71#define pte_clear_bits(p, bits) ((p).pte &= ~(bits))
     72#define pte_copy(to, from) ((to).pte = (from).pte)
     73#define pte_is_zero(p) (!((p).pte & ~_PAGE_NEWPAGE))
     74#define pte_set_val(p, phys, prot) (p).pte = (phys | pgprot_val(prot))
     75
     76typedef unsigned long phys_t;
     77
     78#endif
     79
     80typedef struct { unsigned long pgprot; } pgprot_t;
     81
     82typedef struct page *pgtable_t;
     83
     84#define pgd_val(x)	((x).pgd)
     85#define pgprot_val(x)	((x).pgprot)
     86
     87#define __pte(x) ((pte_t) { (x) } )
     88#define __pgd(x) ((pgd_t) { (x) } )
     89#define __pgprot(x)	((pgprot_t) { (x) } )
     90
     91extern unsigned long uml_physmem;
     92
     93#define PAGE_OFFSET (uml_physmem)
     94#define KERNELBASE PAGE_OFFSET
     95
     96#define __va_space (8*1024*1024)
     97
     98#include <mem.h>
     99
    100/* Cast to unsigned long before casting to void * to avoid a warning from
    101 * mmap_kmem about cutting a long long down to a void *.  Not sure that
    102 * casting is the right thing, but 32-bit UML can't have 64-bit virtual
    103 * addresses
    104 */
    105#define __pa(virt) to_phys((void *) (unsigned long) (virt))
    106#define __va(phys) to_virt((unsigned long) (phys))
    107
    108#define phys_to_pfn(p) ((p) >> PAGE_SHIFT)
    109#define pfn_to_phys(pfn) PFN_PHYS(pfn)
    110
    111#define pfn_valid(pfn) ((pfn) < max_mapnr)
    112#define virt_addr_valid(v) pfn_valid(phys_to_pfn(__pa(v)))
    113
    114#include <asm-generic/memory_model.h>
    115#include <asm-generic/getorder.h>
    116
    117#endif	/* __ASSEMBLY__ */
    118
    119#ifdef CONFIG_X86_32
    120#define __HAVE_ARCH_GATE_AREA 1
    121#endif
    122
    123#endif	/* __UM_PAGE_H */