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 (2288B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 * OpenRISC Linux
      4 *
      5 * Linux architectural port borrowing liberally from similar works of
      6 * others.  All original copyrights apply as per the original source
      7 * declaration.
      8 *
      9 * OpenRISC implementation:
     10 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
     11 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
     12 * et al.
     13 */
     14
     15#ifndef __ASM_OPENRISC_PAGE_H
     16#define __ASM_OPENRISC_PAGE_H
     17
     18
     19/* PAGE_SHIFT determines the page size */
     20
     21#define PAGE_SHIFT      13
     22#ifdef __ASSEMBLY__
     23#define PAGE_SIZE       (1 << PAGE_SHIFT)
     24#else
     25#define PAGE_SIZE       (1UL << PAGE_SHIFT)
     26#endif
     27#define PAGE_MASK       (~(PAGE_SIZE-1))
     28
     29#define PAGE_OFFSET	0xc0000000
     30#define KERNELBASE	PAGE_OFFSET
     31
     32/* This is not necessarily the right place for this, but it's needed by
     33 * drivers/of/fdt.c
     34 */
     35#include <asm/setup.h>
     36
     37#ifndef __ASSEMBLY__
     38
     39#define clear_page(page)	memset((page), 0, PAGE_SIZE)
     40#define copy_page(to, from)	memcpy((to), (from), PAGE_SIZE)
     41
     42#define clear_user_page(page, vaddr, pg)        clear_page(page)
     43#define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
     44
     45/*
     46 * These are used to make use of C type-checking..
     47 */
     48typedef struct {
     49	unsigned long pte;
     50} pte_t;
     51typedef struct {
     52	unsigned long pgd;
     53} pgd_t;
     54typedef struct {
     55	unsigned long pgprot;
     56} pgprot_t;
     57typedef struct page *pgtable_t;
     58
     59#define pte_val(x)	((x).pte)
     60#define pgd_val(x)	((x).pgd)
     61#define pgprot_val(x)	((x).pgprot)
     62
     63#define __pte(x)	((pte_t) { (x) })
     64#define __pgd(x)	((pgd_t) { (x) })
     65#define __pgprot(x)	((pgprot_t) { (x) })
     66
     67#endif /* !__ASSEMBLY__ */
     68
     69
     70#ifndef __ASSEMBLY__
     71
     72#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
     73#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
     74
     75#define virt_to_pfn(kaddr)      (__pa(kaddr) >> PAGE_SHIFT)
     76#define pfn_to_virt(pfn)        __va((pfn) << PAGE_SHIFT)
     77
     78#define virt_to_page(addr) \
     79	(mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
     80
     81#define page_to_phys(page)      ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
     82
     83#define pfn_valid(pfn)          ((pfn) < max_mapnr)
     84
     85#define virt_addr_valid(kaddr)	(pfn_valid(virt_to_pfn(kaddr)))
     86
     87#endif /* __ASSEMBLY__ */
     88
     89#include <asm-generic/memory_model.h>
     90#include <asm-generic/getorder.h>
     91
     92#endif /* __ASM_OPENRISC_PAGE_H */