mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
7c2763c423
nds32 has only two-level page tables and can use pgtable-nopmd and folding of the upper layers. Replace usage of include/asm-generic/4level-fixup.h and explicit definition of __PAGETABLE_PMD_FOLDED in nds32 with include/asm-generic/pgtable-nopmd.h and adjust page table manipulation macros and functions accordingly. Link: http://lkml.kernel.org/r/1572938135-31886-8-git-send-email-rppt@kernel.org Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Cc: Anatoly Pugachev <matorola@gmail.com> Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: "David S. Miller" <davem@davemloft.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: Helge Deller <deller@gmx.de> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Jeff Dike <jdike@addtoit.com> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Cc: Mark Salter <msalter@redhat.com> Cc: Matt Turner <mattst88@gmail.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Peter Rosin <peda@axentia.se> Cc: Richard Weinberger <richard@nod.at> Cc: Rolf Eike Beer <eike-kernel@sf-tec.de> Cc: Russell King <linux@armlinux.org.uk> Cc: Russell King <rmk+kernel@armlinux.org.uk> Cc: Sam Creasey <sammy@sammy.net> Cc: Vincent Chen <deanbo422@gmail.com> Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
// Copyright (C) 2005-2017 Andes Technology Corporation
|
|
|
|
#ifndef _ASMNDS32_PGALLOC_H
|
|
#define _ASMNDS32_PGALLOC_H
|
|
|
|
#include <asm/processor.h>
|
|
#include <asm/cacheflush.h>
|
|
#include <asm/tlbflush.h>
|
|
#include <asm/proc-fns.h>
|
|
|
|
#define __HAVE_ARCH_PTE_ALLOC_ONE
|
|
#include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */
|
|
|
|
/*
|
|
* Since we have only two-level page tables, these are trivial
|
|
*/
|
|
#define pmd_pgtable(pmd) pmd_page(pmd)
|
|
|
|
extern pgd_t *pgd_alloc(struct mm_struct *mm);
|
|
extern void pgd_free(struct mm_struct *mm, pgd_t * pgd);
|
|
|
|
static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
|
|
{
|
|
pgtable_t pte;
|
|
|
|
pte = __pte_alloc_one(mm, GFP_PGTABLE_USER);
|
|
if (pte)
|
|
cpu_dcache_wb_page((unsigned long)page_address(pte));
|
|
|
|
return pte;
|
|
}
|
|
|
|
/*
|
|
* Populate the pmdp entry with a pointer to the pte. This pmd is part
|
|
* of the mm address space.
|
|
*
|
|
* Ensure that we always set both PMD entries.
|
|
*/
|
|
static inline void
|
|
pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmdp, pte_t * ptep)
|
|
{
|
|
unsigned long pte_ptr = (unsigned long)ptep;
|
|
unsigned long pmdval;
|
|
|
|
BUG_ON(mm != &init_mm);
|
|
|
|
/*
|
|
* The pmd must be loaded with the physical
|
|
* address of the PTE table
|
|
*/
|
|
pmdval = __pa(pte_ptr) | _PAGE_KERNEL_TABLE;
|
|
set_pmd(pmdp, __pmd(pmdval));
|
|
}
|
|
|
|
static inline void
|
|
pmd_populate(struct mm_struct *mm, pmd_t * pmdp, pgtable_t ptep)
|
|
{
|
|
unsigned long pmdval;
|
|
|
|
BUG_ON(mm == &init_mm);
|
|
|
|
pmdval = page_to_pfn(ptep) << PAGE_SHIFT | _PAGE_USER_TABLE;
|
|
set_pmd(pmdp, __pmd(pmdval));
|
|
}
|
|
|
|
#endif
|