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 (2351B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef __ASM_GENERIC_PAGE_H
      3#define __ASM_GENERIC_PAGE_H
      4/*
      5 * Generic page.h implementation, for NOMMU architectures.
      6 * This provides the dummy definitions for the memory management.
      7 */
      8
      9#ifdef CONFIG_MMU
     10#error need to provide a real asm/page.h
     11#endif
     12
     13
     14/* PAGE_SHIFT determines the page size */
     15
     16#define PAGE_SHIFT	12
     17#ifdef __ASSEMBLY__
     18#define PAGE_SIZE	(1 << PAGE_SHIFT)
     19#else
     20#define PAGE_SIZE	(1UL << PAGE_SHIFT)
     21#endif
     22#define PAGE_MASK	(~(PAGE_SIZE-1))
     23
     24#include <asm/setup.h>
     25
     26#ifndef __ASSEMBLY__
     27
     28#define clear_page(page)	memset((page), 0, PAGE_SIZE)
     29#define copy_page(to,from)	memcpy((to), (from), PAGE_SIZE)
     30
     31#define clear_user_page(page, vaddr, pg)	clear_page(page)
     32#define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)
     33
     34/*
     35 * These are used to make use of C type-checking..
     36 */
     37typedef struct {
     38	unsigned long pte;
     39} pte_t;
     40typedef struct {
     41	unsigned long pmd[16];
     42} pmd_t;
     43typedef struct {
     44	unsigned long pgd;
     45} pgd_t;
     46typedef struct {
     47	unsigned long pgprot;
     48} pgprot_t;
     49typedef struct page *pgtable_t;
     50
     51#define pte_val(x)	((x).pte)
     52#define pmd_val(x)	((&x)->pmd[0])
     53#define pgd_val(x)	((x).pgd)
     54#define pgprot_val(x)	((x).pgprot)
     55
     56#define __pte(x)	((pte_t) { (x) } )
     57#define __pmd(x)	((pmd_t) { (x) } )
     58#define __pgd(x)	((pgd_t) { (x) } )
     59#define __pgprot(x)	((pgprot_t) { (x) } )
     60
     61extern unsigned long memory_start;
     62extern unsigned long memory_end;
     63
     64#endif /* !__ASSEMBLY__ */
     65
     66#define PAGE_OFFSET		(0)
     67
     68#ifndef ARCH_PFN_OFFSET
     69#define ARCH_PFN_OFFSET		(PAGE_OFFSET >> PAGE_SHIFT)
     70#endif
     71
     72#ifndef __ASSEMBLY__
     73
     74#define __va(x) ((void *)((unsigned long) (x)))
     75#define __pa(x) ((unsigned long) (x))
     76
     77#define virt_to_pfn(kaddr)	(__pa(kaddr) >> PAGE_SHIFT)
     78#define pfn_to_virt(pfn)	__va((pfn) << PAGE_SHIFT)
     79
     80#define virt_to_page(addr)	pfn_to_page(virt_to_pfn(addr))
     81#define page_to_virt(page)	pfn_to_virt(page_to_pfn(page))
     82
     83#ifndef page_to_phys
     84#define page_to_phys(page)      ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
     85#endif
     86
     87#define pfn_valid(pfn)		((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
     88
     89#define	virt_addr_valid(kaddr)	(((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
     90				((void *)(kaddr) < (void *)memory_end))
     91
     92#endif /* __ASSEMBLY__ */
     93
     94#include <asm-generic/memory_model.h>
     95#include <asm-generic/getorder.h>
     96
     97#endif /* __ASM_GENERIC_PAGE_H */