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The cachepolicy variable gets initialized using a masked pmd value. So far, the pmd has been masked with flags valid for the 2-page table format, but the 3-page table format requires a different mask. On LPAE, this lead to a wrong assumption of what initial cache policy has been used. Later a check forces the cache policy to writealloc and prints the following warning: Forcing write-allocate cache policy for SMP This patch introduces a new definition PMD_SECT_CACHE_MASK for both page table formats which masks in all cache flags in both cases. Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
98 lines
3.4 KiB
C
98 lines
3.4 KiB
C
/*
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* arch/arm/include/asm/pgtable-2level-hwdef.h
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*
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* Copyright (C) 1995-2002 Russell King
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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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#ifndef _ASM_PGTABLE_2LEVEL_HWDEF_H
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#define _ASM_PGTABLE_2LEVEL_HWDEF_H
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/*
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* Hardware page table definitions.
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*
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* + Level 1 descriptor (PMD)
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* - common
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*/
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#define PMD_TYPE_MASK (_AT(pmdval_t, 3) << 0)
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#define PMD_TYPE_FAULT (_AT(pmdval_t, 0) << 0)
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#define PMD_TYPE_TABLE (_AT(pmdval_t, 1) << 0)
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#define PMD_TYPE_SECT (_AT(pmdval_t, 2) << 0)
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#define PMD_PXNTABLE (_AT(pmdval_t, 1) << 2) /* v7 */
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#define PMD_BIT4 (_AT(pmdval_t, 1) << 4)
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#define PMD_DOMAIN(x) (_AT(pmdval_t, (x)) << 5)
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#define PMD_DOMAIN_MASK PMD_DOMAIN(0x0f)
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#define PMD_PROTECTION (_AT(pmdval_t, 1) << 9) /* v5 */
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/*
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* - section
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*/
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#define PMD_SECT_PXN (_AT(pmdval_t, 1) << 0) /* v7 */
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#define PMD_SECT_BUFFERABLE (_AT(pmdval_t, 1) << 2)
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#define PMD_SECT_CACHEABLE (_AT(pmdval_t, 1) << 3)
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#define PMD_SECT_XN (_AT(pmdval_t, 1) << 4) /* v6 */
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#define PMD_SECT_AP_WRITE (_AT(pmdval_t, 1) << 10)
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#define PMD_SECT_AP_READ (_AT(pmdval_t, 1) << 11)
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#define PMD_SECT_TEX(x) (_AT(pmdval_t, (x)) << 12) /* v5 */
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#define PMD_SECT_APX (_AT(pmdval_t, 1) << 15) /* v6 */
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#define PMD_SECT_S (_AT(pmdval_t, 1) << 16) /* v6 */
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#define PMD_SECT_nG (_AT(pmdval_t, 1) << 17) /* v6 */
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#define PMD_SECT_SUPER (_AT(pmdval_t, 1) << 18) /* v6 */
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#define PMD_SECT_AF (_AT(pmdval_t, 0))
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#define PMD_SECT_UNCACHED (_AT(pmdval_t, 0))
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#define PMD_SECT_BUFFERED (PMD_SECT_BUFFERABLE)
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#define PMD_SECT_WT (PMD_SECT_CACHEABLE)
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#define PMD_SECT_WB (PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE)
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#define PMD_SECT_MINICACHE (PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE)
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#define PMD_SECT_WBWA (PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE)
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#define PMD_SECT_CACHE_MASK (PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE)
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#define PMD_SECT_NONSHARED_DEV (PMD_SECT_TEX(2))
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/*
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* - coarse table (not used)
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*/
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/*
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* + Level 2 descriptor (PTE)
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* - common
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*/
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#define PTE_TYPE_MASK (_AT(pteval_t, 3) << 0)
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#define PTE_TYPE_FAULT (_AT(pteval_t, 0) << 0)
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#define PTE_TYPE_LARGE (_AT(pteval_t, 1) << 0)
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#define PTE_TYPE_SMALL (_AT(pteval_t, 2) << 0)
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#define PTE_TYPE_EXT (_AT(pteval_t, 3) << 0) /* v5 */
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#define PTE_BUFFERABLE (_AT(pteval_t, 1) << 2)
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#define PTE_CACHEABLE (_AT(pteval_t, 1) << 3)
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/*
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* - extended small page/tiny page
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*/
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#define PTE_EXT_XN (_AT(pteval_t, 1) << 0) /* v6 */
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#define PTE_EXT_AP_MASK (_AT(pteval_t, 3) << 4)
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#define PTE_EXT_AP0 (_AT(pteval_t, 1) << 4)
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#define PTE_EXT_AP1 (_AT(pteval_t, 2) << 4)
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#define PTE_EXT_AP_UNO_SRO (_AT(pteval_t, 0) << 4)
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#define PTE_EXT_AP_UNO_SRW (PTE_EXT_AP0)
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#define PTE_EXT_AP_URO_SRW (PTE_EXT_AP1)
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#define PTE_EXT_AP_URW_SRW (PTE_EXT_AP1|PTE_EXT_AP0)
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#define PTE_EXT_TEX(x) (_AT(pteval_t, (x)) << 6) /* v5 */
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#define PTE_EXT_APX (_AT(pteval_t, 1) << 9) /* v6 */
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#define PTE_EXT_COHERENT (_AT(pteval_t, 1) << 9) /* XScale3 */
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#define PTE_EXT_SHARED (_AT(pteval_t, 1) << 10) /* v6 */
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#define PTE_EXT_NG (_AT(pteval_t, 1) << 11) /* v6 */
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/*
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* - small page
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*/
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#define PTE_SMALL_AP_MASK (_AT(pteval_t, 0xff) << 4)
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#define PTE_SMALL_AP_UNO_SRO (_AT(pteval_t, 0x00) << 4)
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#define PTE_SMALL_AP_UNO_SRW (_AT(pteval_t, 0x55) << 4)
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#define PTE_SMALL_AP_URO_SRW (_AT(pteval_t, 0xaa) << 4)
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#define PTE_SMALL_AP_URW_SRW (_AT(pteval_t, 0xff) << 4)
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#define PHYS_MASK (~0UL)
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#endif
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