forked from Minki/linux
44eaacf1b8
This patch turns on the 16K page support in the kernel. We support 48bit VA (4 level page tables) and 47bit VA (3 level page tables). With 16K we can map 128 entries using contiguous bit hint at level 3 to map 2M using single TLB entry. TODO: 16K supports 32 contiguous entries at level 2 to get us 1G(which is not yet supported by the infrastructure). That should be a separate patch altogether. Cc: Will Deacon <will.deacon@arm.com> Cc: Jeremy Linton <jeremy.linton@arm.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Christoffer Dall <christoffer.dall@linaro.org> Cc: Steve Capper <steve.capper@linaro.org> Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
/*
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* Based on arch/arm/include/asm/page.h
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*
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* Copyright (C) 1995-2003 Russell King
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* Copyright (C) 2012 ARM Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ASM_PAGE_H
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#define __ASM_PAGE_H
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/* PAGE_SHIFT determines the page size */
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/* CONT_SHIFT determines the number of pages which can be tracked together */
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#ifdef CONFIG_ARM64_64K_PAGES
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#define PAGE_SHIFT 16
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#define CONT_SHIFT 5
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#elif defined(CONFIG_ARM64_16K_PAGES)
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#define PAGE_SHIFT 14
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#define CONT_SHIFT 7
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#else
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#define PAGE_SHIFT 12
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#define CONT_SHIFT 4
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#endif
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#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
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#define PAGE_MASK (~(PAGE_SIZE-1))
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#define CONT_SIZE (_AC(1, UL) << (CONT_SHIFT + PAGE_SHIFT))
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#define CONT_MASK (~(CONT_SIZE-1))
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#ifndef __ASSEMBLY__
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#include <asm/pgtable-types.h>
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extern void __cpu_clear_user_page(void *p, unsigned long user);
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extern void __cpu_copy_user_page(void *to, const void *from,
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unsigned long user);
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extern void copy_page(void *to, const void *from);
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extern void clear_page(void *to);
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#define clear_user_page(addr,vaddr,pg) __cpu_clear_user_page(addr, vaddr)
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#define copy_user_page(to,from,vaddr,pg) __cpu_copy_user_page(to, from, vaddr)
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typedef struct page *pgtable_t;
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#ifdef CONFIG_HAVE_ARCH_PFN_VALID
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extern int pfn_valid(unsigned long);
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#endif
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#include <asm/memory.h>
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#endif /* !__ASSEMBLY__ */
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#define VM_DATA_DEFAULT_FLAGS \
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(((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
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VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
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#include <asm-generic/getorder.h>
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#endif
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