60e50f34b1
m68k has two or three levels of page tables and can use appropriate pgtable-nopXd and folding of the upper layers. Replace usage of include/asm-generic/4level-fixup.h and explicit definitions of __PAGETABLE_PxD_FOLDED in m68k with include/asm-generic/pgtable-nopmd.h for two-level configurations and with include/asm-generic/pgtable-nopud.h for three-lelve configurations and adjust page table manipulation macros and functions accordingly. [akpm@linux-foundation.org: fix merge glitch] [geert@linux-m68k.org: more merge glitch fixes] [akpm@linux-foundation.org: s/bad_pgd/bad_pud/, per Mike] Link: http://lkml.kernel.org/r/1572938135-31886-6-git-send-email-rppt@kernel.org Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Acked-by: Greg Ungerer <gerg@linux-m68k.org> 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: 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>
115 lines
2.2 KiB
C
115 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _MOTOROLA_PGALLOC_H
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#define _MOTOROLA_PGALLOC_H
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#include <asm/tlb.h>
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#include <asm/tlbflush.h>
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extern pmd_t *get_pointer_table(void);
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extern int free_pointer_table(pmd_t *);
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static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
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{
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pte_t *pte;
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pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
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if (pte) {
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__flush_page_to_ram(pte);
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flush_tlb_kernel_page(pte);
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nocache_page(pte);
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}
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return pte;
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}
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static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
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{
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cache_page(pte);
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free_page((unsigned long) pte);
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}
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static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
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{
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struct page *page;
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pte_t *pte;
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page = alloc_pages(GFP_KERNEL|__GFP_ZERO, 0);
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if(!page)
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return NULL;
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if (!pgtable_pte_page_ctor(page)) {
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__free_page(page);
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return NULL;
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}
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pte = kmap(page);
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__flush_page_to_ram(pte);
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flush_tlb_kernel_page(pte);
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nocache_page(pte);
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kunmap(page);
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return page;
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}
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static inline void pte_free(struct mm_struct *mm, pgtable_t page)
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{
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pgtable_pte_page_dtor(page);
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cache_page(kmap(page));
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kunmap(page);
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__free_page(page);
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}
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static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t page,
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unsigned long address)
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{
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pgtable_pte_page_dtor(page);
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cache_page(kmap(page));
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kunmap(page);
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__free_page(page);
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}
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static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
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{
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return get_pointer_table();
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}
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static inline int pmd_free(struct mm_struct *mm, pmd_t *pmd)
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{
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return free_pointer_table(pmd);
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}
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static inline int __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
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unsigned long address)
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{
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return free_pointer_table(pmd);
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}
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static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
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{
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pmd_free(mm, (pmd_t *)pgd);
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}
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static inline pgd_t *pgd_alloc(struct mm_struct *mm)
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{
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return (pgd_t *)get_pointer_table();
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}
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static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
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{
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pmd_set(pmd, pte);
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}
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static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
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{
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pmd_set(pmd, page_address(page));
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}
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#define pmd_pgtable(pmd) pmd_page(pmd)
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static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
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{
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pud_set(pud, pmd);
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}
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#endif /* _MOTOROLA_PGALLOC_H */
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