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32 results

motorola_pgalloc.h

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    • Mike Rapoport's avatar
      60e50f34
      m68k: mm: use pgtable-nopXd instead of 4level-fixup · 60e50f34
      Mike Rapoport authored
      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: default avatarMike Rapoport <rppt@linux.ibm.com>
      Acked-by: default avatarGreg 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: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      60e50f34
      History
      m68k: mm: use pgtable-nopXd instead of 4level-fixup
      Mike Rapoport authored
      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: default avatarMike Rapoport <rppt@linux.ibm.com>
      Acked-by: default avatarGreg 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: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    motorola_pgalloc.h 2.22 KiB
    /* SPDX-License-Identifier: GPL-2.0 */
    #ifndef _MOTOROLA_PGALLOC_H
    #define _MOTOROLA_PGALLOC_H
    
    #include <asm/tlb.h>
    #include <asm/tlbflush.h>
    
    extern pmd_t *get_pointer_table(void);
    extern int free_pointer_table(pmd_t *);
    
    static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
    {
    	pte_t *pte;
    
    	pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
    	if (pte) {
    		__flush_page_to_ram(pte);
    		flush_tlb_kernel_page(pte);
    		nocache_page(pte);
    	}
    
    	return pte;
    }
    
    static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
    {
    	cache_page(pte);
    	free_page((unsigned long) pte);
    }
    
    static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
    {
    	struct page *page;
    	pte_t *pte;
    
    	page = alloc_pages(GFP_KERNEL|__GFP_ZERO, 0);
    	if(!page)
    		return NULL;
    	if (!pgtable_pte_page_ctor(page)) {
    		__free_page(page);
    		return NULL;
    	}
    
    	pte = kmap(page);
    	__flush_page_to_ram(pte);
    	flush_tlb_kernel_page(pte);
    	nocache_page(pte);
    	kunmap(page);
    	return page;
    }
    
    static inline void pte_free(struct mm_struct *mm, pgtable_t page)
    {
    	pgtable_pte_page_dtor(page);
    	cache_page(kmap(page));
    	kunmap(page);
    	__free_page(page);
    }
    
    static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t page,
    				  unsigned long address)
    {
    	pgtable_pte_page_dtor(page);
    	cache_page(kmap(page));
    	kunmap(page);
    	__free_page(page);
    }
    
    
    static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
    {
    	return get_pointer_table();
    }
    
    static inline int pmd_free(struct mm_struct *mm, pmd_t *pmd)
    {
    	return free_pointer_table(pmd);
    }
    
    static inline int __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
    				 unsigned long address)
    {
    	return free_pointer_table(pmd);
    }
    
    
    static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
    {
    	pmd_free(mm, (pmd_t *)pgd);
    }
    
    static inline pgd_t *pgd_alloc(struct mm_struct *mm)
    {
    	return (pgd_t *)get_pointer_table();
    }
    
    
    static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
    {
    	pmd_set(pmd, pte);
    }
    
    static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
    {
    	pmd_set(pmd, page_address(page));
    }
    #define pmd_pgtable(pmd) pmd_page(pmd)
    
    static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
    {
    	pud_set(pud, pmd);
    }
    
    #endif /* _MOTOROLA_PGALLOC_H */