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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pgtable-nommu.h (2131B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 *  arch/arm/include/asm/pgtable-nommu.h
      4 *
      5 *  Copyright (C) 1995-2002 Russell King
      6 *  Copyright (C) 2004  Hyok S. Choi
      7 */
      8#ifndef _ASMARM_PGTABLE_NOMMU_H
      9#define _ASMARM_PGTABLE_NOMMU_H
     10
     11#ifndef __ASSEMBLY__
     12
     13#include <linux/slab.h>
     14#include <asm/processor.h>
     15#include <asm/page.h>
     16
     17/*
     18 * Trivial page table functions.
     19 */
     20#define pgd_present(pgd)	(1)
     21#define pgd_none(pgd)		(0)
     22#define pgd_bad(pgd)		(0)
     23#define pgd_clear(pgdp)
     24#define kern_addr_valid(addr)	(1)
     25/* FIXME */
     26/*
     27 * PMD_SHIFT determines the size of the area a second-level page table can map
     28 * PGDIR_SHIFT determines what a third-level page table entry can map
     29 */
     30#define PGDIR_SHIFT		21
     31
     32#define PGDIR_SIZE		(1UL << PGDIR_SHIFT)
     33#define PGDIR_MASK		(~(PGDIR_SIZE-1))
     34/* FIXME */
     35
     36#define PAGE_NONE	__pgprot(0)
     37#define PAGE_SHARED	__pgprot(0)
     38#define PAGE_COPY	__pgprot(0)
     39#define PAGE_READONLY	__pgprot(0)
     40#define PAGE_KERNEL	__pgprot(0)
     41
     42#define swapper_pg_dir ((pgd_t *) 0)
     43
     44
     45typedef pte_t *pte_addr_t;
     46
     47/*
     48 * ZERO_PAGE is a global shared page that is always zero: used
     49 * for zero-mapped memory areas etc..
     50 */
     51#define ZERO_PAGE(vaddr)	(virt_to_page(0))
     52
     53/*
     54 * Mark the prot value as uncacheable and unbufferable.
     55 */
     56#define pgprot_noncached(prot)	(prot)
     57#define pgprot_writecombine(prot) (prot)
     58#define pgprot_device(prot)	(prot)
     59
     60
     61/*
     62 * These would be in other places but having them here reduces the diffs.
     63 */
     64extern unsigned int kobjsize(const void *objp);
     65
     66/*
     67 * All 32bit addresses are effectively valid for vmalloc...
     68 * Sort of meaningless for non-VM targets.
     69 */
     70#define	VMALLOC_START	0UL
     71#define	VMALLOC_END	0xffffffffUL
     72
     73#define FIRST_USER_ADDRESS      0UL
     74
     75#else 
     76
     77/*
     78 * dummy tlb and user structures.
     79 */
     80#define v3_tlb_fns	(0)
     81#define v4_tlb_fns	(0)
     82#define v4wb_tlb_fns	(0)
     83#define v4wbi_tlb_fns	(0)
     84#define v6wbi_tlb_fns	(0)
     85#define v7wbi_tlb_fns	(0)
     86
     87#define v3_user_fns	(0)
     88#define v4_user_fns	(0)
     89#define v4_mc_user_fns	(0)
     90#define v4wb_user_fns	(0)
     91#define v4wt_user_fns	(0)
     92#define v6_user_fns	(0)
     93#define xscale_mc_user_fns (0)
     94
     95#endif /*__ASSEMBLY__*/
     96
     97#endif /* _ASMARM_PGTABLE_H */