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Most architectures define pgd_free() as a wrapper for free_page(). Provide a generic version in asm-generic/pgalloc.h and enable its use for most architectures. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Pekka Enberg <penberg@kernel.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> [m68k] Cc: Abdul Haleem <abdhalee@linux.vnet.ibm.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Joerg Roedel <joro@8bytes.org> Cc: Joerg Roedel <jroedel@suse.de> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com> Cc: Stafford Horne <shorne@gmail.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Matthew Wilcox <willy@infradead.org> Link: http://lkml.kernel.org/r/20200627143453.31835-7-rppt@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
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#ifndef __ASM_CSKY_PGALLOC_H
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#define __ASM_CSKY_PGALLOC_H
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#include <linux/highmem.h>
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#include <linux/mm.h>
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#include <linux/sched.h>
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#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
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#include <asm-generic/pgalloc.h>
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static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
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pte_t *pte)
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{
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set_pmd(pmd, __pmd(__pa(pte)));
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}
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static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
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pgtable_t pte)
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{
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set_pmd(pmd, __pmd(__pa(page_address(pte))));
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}
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#define pmd_pgtable(pmd) pmd_page(pmd)
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extern void pgd_init(unsigned long *p);
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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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unsigned long i;
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pte = (pte_t *) __get_free_page(GFP_KERNEL);
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if (!pte)
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return NULL;
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for (i = 0; i < PAGE_SIZE/sizeof(pte_t); i++)
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(pte + i)->pte_low = _PAGE_GLOBAL;
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return pte;
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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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pgd_t *ret;
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pgd_t *init;
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ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
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if (ret) {
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init = pgd_offset(&init_mm, 0UL);
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pgd_init((unsigned long *)ret);
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memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
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(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
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/* prevent out of order excute */
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smp_mb();
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#ifdef CONFIG_CPU_NEED_TLBSYNC
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dcache_wb_range((unsigned int)ret,
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(unsigned int)(ret + PTRS_PER_PGD));
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#endif
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}
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return ret;
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}
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#define __pte_free_tlb(tlb, pte, address) \
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do { \
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pgtable_pte_page_dtor(pte); \
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tlb_remove_page(tlb, pte); \
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} while (0)
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extern void pagetable_init(void);
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extern void pre_mmu_init(void);
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extern void pre_trap_init(void);
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#endif /* __ASM_CSKY_PGALLOC_H */
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