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 (4076B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * VM ops
      4 *
      5 * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
      6 * Copyright (C) 2008-2009 PetaLogix
      7 * Copyright (C) 2006 Atmark Techno, Inc.
      8 * Changes for MMU support:
      9 *    Copyright (C) 2007 Xilinx, Inc.  All rights reserved.
     10 */
     11
     12#ifndef _ASM_MICROBLAZE_PAGE_H
     13#define _ASM_MICROBLAZE_PAGE_H
     14
     15#include <linux/pfn.h>
     16#include <asm/setup.h>
     17#include <asm/asm-compat.h>
     18#include <linux/const.h>
     19
     20#ifdef __KERNEL__
     21
     22/* PAGE_SHIFT determines the page size */
     23#define PAGE_SHIFT		12
     24#define PAGE_SIZE	(ASM_CONST(1) << PAGE_SHIFT)
     25#define PAGE_MASK	(~(PAGE_SIZE-1))
     26
     27#define LOAD_OFFSET	ASM_CONST((CONFIG_KERNEL_START-CONFIG_KERNEL_BASE_ADDR))
     28
     29#define PTE_SHIFT	(PAGE_SHIFT - 2)	/* 1024 ptes per page */
     30
     31#ifndef __ASSEMBLY__
     32
     33/* MS be sure that SLAB allocates aligned objects */
     34#define ARCH_DMA_MINALIGN	L1_CACHE_BYTES
     35
     36#define ARCH_SLAB_MINALIGN	L1_CACHE_BYTES
     37
     38/*
     39 * PAGE_OFFSET -- the first address of the first page of memory. With MMU
     40 * it is set to the kernel start address (aligned on a page boundary).
     41 *
     42 * CONFIG_KERNEL_START is defined in arch/microblaze/config.in and used
     43 * in arch/microblaze/Makefile.
     44 */
     45#define PAGE_OFFSET	CONFIG_KERNEL_START
     46
     47/*
     48 * The basic type of a PTE - 32 bit physical addressing.
     49 */
     50typedef unsigned long pte_basic_t;
     51#define PTE_FMT		"%.8lx"
     52
     53# define copy_page(to, from)			memcpy((to), (from), PAGE_SIZE)
     54# define clear_page(pgaddr)			memset((pgaddr), 0, PAGE_SIZE)
     55
     56# define clear_user_page(pgaddr, vaddr, page)	memset((pgaddr), 0, PAGE_SIZE)
     57# define copy_user_page(vto, vfrom, vaddr, topg) \
     58			memcpy((vto), (vfrom), PAGE_SIZE)
     59
     60/*
     61 * These are used to make use of C type-checking..
     62 */
     63typedef struct page *pgtable_t;
     64typedef struct { unsigned long	pte; }		pte_t;
     65typedef struct { unsigned long	pgprot; }	pgprot_t;
     66/* FIXME this can depend on linux kernel version */
     67typedef struct { unsigned long pgd; } pgd_t;
     68
     69# define pte_val(x)	((x).pte)
     70# define pgprot_val(x)	((x).pgprot)
     71
     72#   define pgd_val(x)      ((x).pgd)
     73
     74# define __pte(x)	((pte_t) { (x) })
     75# define __pgd(x)	((pgd_t) { (x) })
     76# define __pgprot(x)	((pgprot_t) { (x) })
     77
     78/**
     79 * Conversions for virtual address, physical address, pfn, and struct
     80 * page are defined in the following files.
     81 *
     82 * virt -+
     83 *	 | asm-microblaze/page.h
     84 * phys -+
     85 *	 | linux/pfn.h
     86 *  pfn -+
     87 *	 | asm-generic/memory_model.h
     88 * page -+
     89 *
     90 */
     91
     92extern unsigned long max_low_pfn;
     93extern unsigned long min_low_pfn;
     94extern unsigned long max_pfn;
     95
     96extern unsigned long memory_start;
     97extern unsigned long memory_size;
     98extern unsigned long lowmem_size;
     99
    100extern unsigned long kernel_tlb;
    101
    102extern int page_is_ram(unsigned long pfn);
    103
    104# define phys_to_pfn(phys)	(PFN_DOWN(phys))
    105# define pfn_to_phys(pfn)	(PFN_PHYS(pfn))
    106
    107# define virt_to_pfn(vaddr)	(phys_to_pfn((__pa(vaddr))))
    108# define pfn_to_virt(pfn)	__va(pfn_to_phys((pfn)))
    109
    110#  define virt_to_page(kaddr)	(pfn_to_page(__pa(kaddr) >> PAGE_SHIFT))
    111#  define page_to_virt(page)   __va(page_to_pfn(page) << PAGE_SHIFT)
    112#  define page_to_phys(page)     (page_to_pfn(page) << PAGE_SHIFT)
    113
    114#  define ARCH_PFN_OFFSET	(memory_start >> PAGE_SHIFT)
    115#  define pfn_valid(pfn)	((pfn) >= ARCH_PFN_OFFSET && (pfn) < (max_mapnr + ARCH_PFN_OFFSET))
    116# endif /* __ASSEMBLY__ */
    117
    118#define	virt_addr_valid(vaddr)	(pfn_valid(virt_to_pfn(vaddr)))
    119
    120# define __pa(x)	__virt_to_phys((unsigned long)(x))
    121# define __va(x)	((void *)__phys_to_virt((unsigned long)(x)))
    122
    123/* Convert between virtual and physical address for MMU. */
    124/* Handle MicroBlaze processor with virtual memory. */
    125#define __virt_to_phys(addr) \
    126	((addr) + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START)
    127#define __phys_to_virt(addr) \
    128	((addr) + CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR)
    129#define tophys(rd, rs) \
    130	addik rd, rs, (CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START)
    131#define tovirt(rd, rs) \
    132	addik rd, rs, (CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR)
    133
    134#define TOPHYS(addr)  __virt_to_phys(addr)
    135
    136#endif /* __KERNEL__ */
    137
    138#include <asm-generic/memory_model.h>
    139#include <asm-generic/getorder.h>
    140
    141#endif /* _ASM_MICROBLAZE_PAGE_H */