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75 lines
1.8 KiB
75 lines
1.8 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* OpenRISC Linux |
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* |
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* Linux architectural port borrowing liberally from similar works of |
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* others. All original copyrights apply as per the original source |
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* declaration. |
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* |
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* OpenRISC implementation: |
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* Copyright (C) 2003 Matjaz Breskvar <[email protected]> |
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* Copyright (C) 2010-2011 Jonas Bonn <[email protected]> |
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* et al. |
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*/ |
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#ifndef __ASM_OPENRISC_PGALLOC_H |
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#define __ASM_OPENRISC_PGALLOC_H |
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#include <asm/page.h> |
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#include <linux/threads.h> |
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#include <linux/mm.h> |
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#include <linux/memblock.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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extern int mem_init_done; |
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#define pmd_populate_kernel(mm, pmd, pte) \ |
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set_pmd(pmd, __pmd(_KERNPG_TABLE + __pa(pte))) |
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static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, |
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struct page *pte) |
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{ |
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set_pmd(pmd, __pmd(_KERNPG_TABLE + |
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((unsigned long)page_to_pfn(pte) << |
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(unsigned long) PAGE_SHIFT))); |
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} |
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/* |
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* Allocate and free page tables. |
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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 = (pgd_t *)__get_free_page(GFP_KERNEL); |
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if (ret) { |
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memset(ret, 0, USER_PTRS_PER_PGD * sizeof(pgd_t)); |
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memcpy(ret + USER_PTRS_PER_PGD, |
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swapper_pg_dir + USER_PTRS_PER_PGD, |
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(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); |
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} |
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return ret; |
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} |
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#if 0 |
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/* FIXME: This seems to be the preferred style, but we are using |
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* current_pgd (from mm->pgd) to load kernel pages so we need it |
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* initialized. This needs to be looked into. |
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*/ |
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extern inline pgd_t *pgd_alloc(struct mm_struct *mm) |
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{ |
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return (pgd_t *)get_zeroed_page(GFP_KERNEL); |
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} |
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#endif |
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extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm); |
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#define __pte_free_tlb(tlb, pte, addr) \ |
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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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#endif
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