arch/arm64/include/asm/pgtable-hwdef.h - linux - Git at Google

 /*
  * Copyright (C) 2012 ARM Ltd.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #ifndef __ASM_PGTABLE_HWDEF_H
 #define __ASM_PGTABLE_HWDEF_H

 /*
  * Number of page-table levels required to address 'va_bits' wide
  * address, without section mapping. We resolve the top (va_bits - PAGE_SHIFT)
  * bits with (PAGE_SHIFT - 3) bits at each page table level. Hence:
  *
  *  levels = DIV_ROUND_UP((va_bits - PAGE_SHIFT), (PAGE_SHIFT - 3))
  *
  * where DIV_ROUND_UP(n, d) => (((n) + (d) - 1) / (d))
  *
  * We cannot include linux/kernel.h which defines DIV_ROUND_UP here
  * due to build issues. So we open code DIV_ROUND_UP here:
  *
  *	((((va_bits) - PAGE_SHIFT) + (PAGE_SHIFT - 3) - 1) / (PAGE_SHIFT - 3))
  *
  * which gets simplified as :
  */
 #define ARM64_HW_PGTABLE_LEVELS(va_bits) (((va_bits) - 4) / (PAGE_SHIFT - 3))

 /*
  * Size mapped by an entry at level n ( 0 <= n <= 3)
  * We map (PAGE_SHIFT - 3) at all translation levels and PAGE_SHIFT bits
  * in the final page. The maximum number of translation levels supported by
  * the architecture is 4. Hence, starting at at level n, we have further
  * ((4 - n) - 1) levels of translation excluding the offset within the page.
  * So, the total number of bits mapped by an entry at level n is :
  *
  *  ((4 - n) - 1) * (PAGE_SHIFT - 3) + PAGE_SHIFT
  *
  * Rearranging it a bit we get :
  *   (4 - n) * (PAGE_SHIFT - 3) + 3
  */
 #define ARM64_HW_PGTABLE_LEVEL_SHIFT(n)	((PAGE_SHIFT - 3) * (4 - (n)) + 3)

 #define PTRS_PER_PTE		(1 << (PAGE_SHIFT - 3))

 /*
  * PMD_SHIFT determines the size a level 2 page table entry can map.
  */
 #if CONFIG_PGTABLE_LEVELS > 2
 #define PMD_SHIFT		ARM64_HW_PGTABLE_LEVEL_SHIFT(2)
 #define PMD_SIZE		(_AC(1, UL) << PMD_SHIFT)
 #define PMD_MASK		(~(PMD_SIZE-1))
 #define PTRS_PER_PMD		PTRS_PER_PTE
 #endif

 /*
  * PUD_SHIFT determines the size a level 1 page table entry can map.
  */
 #if CONFIG_PGTABLE_LEVELS > 3
 #define PUD_SHIFT		ARM64_HW_PGTABLE_LEVEL_SHIFT(1)
 #define PUD_SIZE		(_AC(1, UL) << PUD_SHIFT)
 #define PUD_MASK		(~(PUD_SIZE-1))
 #define PTRS_PER_PUD		PTRS_PER_PTE
 #endif

 /*
  * PGDIR_SHIFT determines the size a top-level page table entry can map
  * (depending on the configuration, this level can be 0, 1 or 2).
  */
 #define PGDIR_SHIFT		ARM64_HW_PGTABLE_LEVEL_SHIFT(4 - CONFIG_PGTABLE_LEVELS)
 #define PGDIR_SIZE		(_AC(1, UL) << PGDIR_SHIFT)
 #define PGDIR_MASK		(~(PGDIR_SIZE-1))
 #define PTRS_PER_PGD		(1 << (VA_BITS - PGDIR_SHIFT))

 /*
  * Section address mask and size definitions.
  */
 #define SECTION_SHIFT		PMD_SHIFT
 #define SECTION_SIZE		(_AC(1, UL) << SECTION_SHIFT)
 #define SECTION_MASK		(~(SECTION_SIZE-1))

 /*
  * Contiguous page definitions.
  */
 #ifdef CONFIG_ARM64_64K_PAGES
 #define CONT_PTE_SHIFT		5
 #define CONT_PMD_SHIFT		5
 #elif defined(CONFIG_ARM64_16K_PAGES)
 #define CONT_PTE_SHIFT		7
 #define CONT_PMD_SHIFT		5
 #else
 #define CONT_PTE_SHIFT		4
 #define CONT_PMD_SHIFT		4
 #endif

 #define CONT_PTES		(1 << CONT_PTE_SHIFT)
 #define CONT_PTE_SIZE		(CONT_PTES * PAGE_SIZE)
 #define CONT_PTE_MASK		(~(CONT_PTE_SIZE - 1))
 #define CONT_PMDS		(1 << CONT_PMD_SHIFT)
 #define CONT_PMD_SIZE		(CONT_PMDS * PMD_SIZE)
 #define CONT_PMD_MASK		(~(CONT_PMD_SIZE - 1))
 /* the the numerical offset of the PTE within a range of CONT_PTES */
 #define CONT_RANGE_OFFSET(addr) (((addr)>>PAGE_SHIFT)&(CONT_PTES-1))

 /*
  * Hardware page table definitions.
  *
  * Level 1 descriptor (PUD).
  */
 #define PUD_TYPE_TABLE		(_AT(pudval_t, 3) << 0)
 #define PUD_TABLE_BIT		(_AT(pgdval_t, 1) << 1)
 #define PUD_TYPE_MASK		(_AT(pgdval_t, 3) << 0)
 #define PUD_TYPE_SECT		(_AT(pgdval_t, 1) << 0)

 /*
  * Level 2 descriptor (PMD).
  */
 #define PMD_TYPE_MASK		(_AT(pmdval_t, 3) << 0)
 #define PMD_TYPE_FAULT		(_AT(pmdval_t, 0) << 0)
 #define PMD_TYPE_TABLE		(_AT(pmdval_t, 3) << 0)
 #define PMD_TYPE_SECT		(_AT(pmdval_t, 1) << 0)
 #define PMD_TABLE_BIT		(_AT(pmdval_t, 1) << 1)

 /*
  * Section
  */
 #define PMD_SECT_VALID		(_AT(pmdval_t, 1) << 0)
 #define PMD_SECT_PROT_NONE	(_AT(pmdval_t, 1) << 58)
 #define PMD_SECT_USER		(_AT(pmdval_t, 1) << 6)		/* AP[1] */
 #define PMD_SECT_RDONLY		(_AT(pmdval_t, 1) << 7)		/* AP[2] */
 #define PMD_SECT_S		(_AT(pmdval_t, 3) << 8)
 #define PMD_SECT_AF		(_AT(pmdval_t, 1) << 10)
 #define PMD_SECT_NG		(_AT(pmdval_t, 1) << 11)
 #define PMD_SECT_CONT		(_AT(pmdval_t, 1) << 52)
 #define PMD_SECT_PXN		(_AT(pmdval_t, 1) << 53)
 #define PMD_SECT_UXN		(_AT(pmdval_t, 1) << 54)

 /*
  * AttrIndx[2:0] encoding (mapping attributes defined in the MAIR* registers).
  */
 #define PMD_ATTRINDX(t)		(_AT(pmdval_t, (t)) << 2)
 #define PMD_ATTRINDX_MASK	(_AT(pmdval_t, 7) << 2)

 /*
  * Level 3 descriptor (PTE).
  */
 #define PTE_TYPE_MASK		(_AT(pteval_t, 3) << 0)
 #define PTE_TYPE_FAULT		(_AT(pteval_t, 0) << 0)
 #define PTE_TYPE_PAGE		(_AT(pteval_t, 3) << 0)
 #define PTE_TABLE_BIT		(_AT(pteval_t, 1) << 1)
 #define PTE_USER		(_AT(pteval_t, 1) << 6)		/* AP[1] */
 #define PTE_RDONLY		(_AT(pteval_t, 1) << 7)		/* AP[2] */
 #define PTE_SHARED		(_AT(pteval_t, 3) << 8)		/* SH[1:0], inner shareable */
 #define PTE_AF			(_AT(pteval_t, 1) << 10)	/* Access Flag */
 #define PTE_NG			(_AT(pteval_t, 1) << 11)	/* nG */
 #define PTE_DBM			(_AT(pteval_t, 1) << 51)	/* Dirty Bit Management */
 #define PTE_CONT		(_AT(pteval_t, 1) << 52)	/* Contiguous range */
 #define PTE_PXN			(_AT(pteval_t, 1) << 53)	/* Privileged XN */
 #define PTE_UXN			(_AT(pteval_t, 1) << 54)	/* User XN */

 /*
  * AttrIndx[2:0] encoding (mapping attributes defined in the MAIR* registers).
  */
 #define PTE_ATTRINDX(t)		(_AT(pteval_t, (t)) << 2)
 #define PTE_ATTRINDX_MASK	(_AT(pteval_t, 7) << 2)

 /*
  * 2nd stage PTE definitions
  */
 #define PTE_S2_RDONLY		(_AT(pteval_t, 1) << 6)   /* HAP[2:1] */
 #define PTE_S2_RDWR		(_AT(pteval_t, 3) << 6)   /* HAP[2:1] */

 #define PMD_S2_RDONLY		(_AT(pmdval_t, 1) << 6)   /* HAP[2:1] */
 #define PMD_S2_RDWR		(_AT(pmdval_t, 3) << 6)   /* HAP[2:1] */

 /*
  * Memory Attribute override for Stage-2 (MemAttr[3:0])
  */
 #define PTE_S2_MEMATTR(t)	(_AT(pteval_t, (t)) << 2)
 #define PTE_S2_MEMATTR_MASK	(_AT(pteval_t, 0xf) << 2)

 /*
  * EL2/HYP PTE/PMD definitions
  */
 #define PMD_HYP			PMD_SECT_USER
 #define PTE_HYP			PTE_USER

 /*
  * Highest possible physical address supported.
  */
 #define PHYS_MASK_SHIFT		(48)
 #define PHYS_MASK		((UL(1) << PHYS_MASK_SHIFT) - 1)

 /*
  * TCR flags.
  */
 #define TCR_T0SZ_OFFSET		0
 #define TCR_T1SZ_OFFSET		16
 #define TCR_T0SZ(x)		((UL(64) - (x)) << TCR_T0SZ_OFFSET)
 #define TCR_T1SZ(x)		((UL(64) - (x)) << TCR_T1SZ_OFFSET)
 #define TCR_TxSZ(x)		(TCR_T0SZ(x) | TCR_T1SZ(x))
 #define TCR_TxSZ_WIDTH		6
 #define TCR_IRGN_NC		((UL(0) << 8) | (UL(0) << 24))
 #define TCR_IRGN_WBWA		((UL(1) << 8) | (UL(1) << 24))
 #define TCR_IRGN_WT		((UL(2) << 8) | (UL(2) << 24))
 #define TCR_IRGN_WBnWA		((UL(3) << 8) | (UL(3) << 24))
 #define TCR_IRGN_MASK		((UL(3) << 8) | (UL(3) << 24))
 #define TCR_ORGN_NC		((UL(0) << 10) | (UL(0) << 26))
 #define TCR_ORGN_WBWA		((UL(1) << 10) | (UL(1) << 26))
 #define TCR_ORGN_WT		((UL(2) << 10) | (UL(2) << 26))
 #define TCR_ORGN_WBnWA		((UL(3) << 10) | (UL(3) << 26))
 #define TCR_ORGN_MASK		((UL(3) << 10) | (UL(3) << 26))
 #define TCR_SHARED		((UL(3) << 12) | (UL(3) << 28))
 #define TCR_TG0_4K		(UL(0) << 14)
 #define TCR_TG0_64K		(UL(1) << 14)
 #define TCR_TG0_16K		(UL(2) << 14)
 #define TCR_TG1_16K		(UL(1) << 30)
 #define TCR_TG1_4K		(UL(2) << 30)
 #define TCR_TG1_64K		(UL(3) << 30)
 #define TCR_ASID16		(UL(1) << 36)
 #define TCR_TBI0		(UL(1) << 37)
 #define TCR_HA			(UL(1) << 39)
 #define TCR_HD			(UL(1) << 40)

 #endif
	/*
	* Copyright (C) 2012 ARM Ltd.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*/
	#ifndef __ASM_PGTABLE_HWDEF_H
	#define __ASM_PGTABLE_HWDEF_H

	/*
	* Number of page-table levels required to address 'va_bits' wide
	* address, without section mapping. We resolve the top (va_bits - PAGE_SHIFT)
	* bits with (PAGE_SHIFT - 3) bits at each page table level. Hence:
	*
	* levels = DIV_ROUND_UP((va_bits - PAGE_SHIFT), (PAGE_SHIFT - 3))
	*
	* where DIV_ROUND_UP(n, d) => (((n) + (d) - 1) / (d))
	*
	* We cannot include linux/kernel.h which defines DIV_ROUND_UP here
	* due to build issues. So we open code DIV_ROUND_UP here:
	*
	* ((((va_bits) - PAGE_SHIFT) + (PAGE_SHIFT - 3) - 1) / (PAGE_SHIFT - 3))
	*
	* which gets simplified as :
	*/
	#define ARM64_HW_PGTABLE_LEVELS(va_bits) (((va_bits) - 4) / (PAGE_SHIFT - 3))

	/*
	* Size mapped by an entry at level n ( 0 <= n <= 3)
	* We map (PAGE_SHIFT - 3) at all translation levels and PAGE_SHIFT bits
	* in the final page. The maximum number of translation levels supported by
	* the architecture is 4. Hence, starting at at level n, we have further
	* ((4 - n) - 1) levels of translation excluding the offset within the page.
	* So, the total number of bits mapped by an entry at level n is :
	*
	* ((4 - n) - 1) * (PAGE_SHIFT - 3) + PAGE_SHIFT
	*
	* Rearranging it a bit we get :
	* (4 - n) * (PAGE_SHIFT - 3) + 3
	*/
	#define ARM64_HW_PGTABLE_LEVEL_SHIFT(n) ((PAGE_SHIFT - 3) * (4 - (n)) + 3)

	#define PTRS_PER_PTE (1 << (PAGE_SHIFT - 3))

	/*
	* PMD_SHIFT determines the size a level 2 page table entry can map.
	*/
	#if CONFIG_PGTABLE_LEVELS > 2
	#define PMD_SHIFT ARM64_HW_PGTABLE_LEVEL_SHIFT(2)
	#define PMD_SIZE (_AC(1, UL) << PMD_SHIFT)
	#define PMD_MASK (~(PMD_SIZE-1))
	#define PTRS_PER_PMD PTRS_PER_PTE
	#endif

	/*
	* PUD_SHIFT determines the size a level 1 page table entry can map.
	*/
	#if CONFIG_PGTABLE_LEVELS > 3
	#define PUD_SHIFT ARM64_HW_PGTABLE_LEVEL_SHIFT(1)
	#define PUD_SIZE (_AC(1, UL) << PUD_SHIFT)
	#define PUD_MASK (~(PUD_SIZE-1))
	#define PTRS_PER_PUD PTRS_PER_PTE
	#endif

	/*
	* PGDIR_SHIFT determines the size a top-level page table entry can map
	* (depending on the configuration, this level can be 0, 1 or 2).
	*/
	#define PGDIR_SHIFT ARM64_HW_PGTABLE_LEVEL_SHIFT(4 - CONFIG_PGTABLE_LEVELS)
	#define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT)
	#define PGDIR_MASK (~(PGDIR_SIZE-1))
	#define PTRS_PER_PGD (1 << (VA_BITS - PGDIR_SHIFT))

	/*
	* Section address mask and size definitions.
	*/
	#define SECTION_SHIFT PMD_SHIFT
	#define SECTION_SIZE (_AC(1, UL) << SECTION_SHIFT)
	#define SECTION_MASK (~(SECTION_SIZE-1))

	/*
	* Contiguous page definitions.
	*/
	#ifdef CONFIG_ARM64_64K_PAGES
	#define CONT_PTE_SHIFT 5
	#define CONT_PMD_SHIFT 5
	#elif defined(CONFIG_ARM64_16K_PAGES)
	#define CONT_PTE_SHIFT 7
	#define CONT_PMD_SHIFT 5
	#else
	#define CONT_PTE_SHIFT 4
	#define CONT_PMD_SHIFT 4
	#endif

	#define CONT_PTES (1 << CONT_PTE_SHIFT)
	#define CONT_PTE_SIZE (CONT_PTES * PAGE_SIZE)
	#define CONT_PTE_MASK (~(CONT_PTE_SIZE - 1))
	#define CONT_PMDS (1 << CONT_PMD_SHIFT)
	#define CONT_PMD_SIZE (CONT_PMDS * PMD_SIZE)
	#define CONT_PMD_MASK (~(CONT_PMD_SIZE - 1))
	/* the the numerical offset of the PTE within a range of CONT_PTES */
	#define CONT_RANGE_OFFSET(addr) (((addr)>>PAGE_SHIFT)&(CONT_PTES-1))

	/*
	* Hardware page table definitions.
	*
	* Level 1 descriptor (PUD).
	*/
	#define PUD_TYPE_TABLE (_AT(pudval_t, 3) << 0)
	#define PUD_TABLE_BIT (_AT(pgdval_t, 1) << 1)
	#define PUD_TYPE_MASK (_AT(pgdval_t, 3) << 0)
	#define PUD_TYPE_SECT (_AT(pgdval_t, 1) << 0)

	/*
	* Level 2 descriptor (PMD).
	*/
	#define PMD_TYPE_MASK (_AT(pmdval_t, 3) << 0)
	#define PMD_TYPE_FAULT (_AT(pmdval_t, 0) << 0)
	#define PMD_TYPE_TABLE (_AT(pmdval_t, 3) << 0)
	#define PMD_TYPE_SECT (_AT(pmdval_t, 1) << 0)
	#define PMD_TABLE_BIT (_AT(pmdval_t, 1) << 1)

	/*
	* Section
	*/
	#define PMD_SECT_VALID (_AT(pmdval_t, 1) << 0)
	#define PMD_SECT_PROT_NONE (_AT(pmdval_t, 1) << 58)
	#define PMD_SECT_USER (_AT(pmdval_t, 1) << 6) /* AP[1] */
	#define PMD_SECT_RDONLY (_AT(pmdval_t, 1) << 7) /* AP[2] */
	#define PMD_SECT_S (_AT(pmdval_t, 3) << 8)
	#define PMD_SECT_AF (_AT(pmdval_t, 1) << 10)
	#define PMD_SECT_NG (_AT(pmdval_t, 1) << 11)
	#define PMD_SECT_CONT (_AT(pmdval_t, 1) << 52)
	#define PMD_SECT_PXN (_AT(pmdval_t, 1) << 53)
	#define PMD_SECT_UXN (_AT(pmdval_t, 1) << 54)

	/*
	* AttrIndx[2:0] encoding (mapping attributes defined in the MAIR* registers).
	*/
	#define PMD_ATTRINDX(t) (_AT(pmdval_t, (t)) << 2)
	#define PMD_ATTRINDX_MASK (_AT(pmdval_t, 7) << 2)

	/*
	* Level 3 descriptor (PTE).
	*/
	#define PTE_TYPE_MASK (_AT(pteval_t, 3) << 0)
	#define PTE_TYPE_FAULT (_AT(pteval_t, 0) << 0)
	#define PTE_TYPE_PAGE (_AT(pteval_t, 3) << 0)
	#define PTE_TABLE_BIT (_AT(pteval_t, 1) << 1)
	#define PTE_USER (_AT(pteval_t, 1) << 6) /* AP[1] */
	#define PTE_RDONLY (_AT(pteval_t, 1) << 7) /* AP[2] */
	#define PTE_SHARED (_AT(pteval_t, 3) << 8) /* SH[1:0], inner shareable */
	#define PTE_AF (_AT(pteval_t, 1) << 10) /* Access Flag */
	#define PTE_NG (_AT(pteval_t, 1) << 11) /* nG */
	#define PTE_DBM (_AT(pteval_t, 1) << 51) /* Dirty Bit Management */
	#define PTE_CONT (_AT(pteval_t, 1) << 52) /* Contiguous range */
	#define PTE_PXN (_AT(pteval_t, 1) << 53) /* Privileged XN */
	#define PTE_UXN (_AT(pteval_t, 1) << 54) /* User XN */

	/*
	* AttrIndx[2:0] encoding (mapping attributes defined in the MAIR* registers).
	*/
	#define PTE_ATTRINDX(t) (_AT(pteval_t, (t)) << 2)
	#define PTE_ATTRINDX_MASK (_AT(pteval_t, 7) << 2)

	/*
	* 2nd stage PTE definitions
	*/
	#define PTE_S2_RDONLY (_AT(pteval_t, 1) << 6) /* HAP[2:1] */
	#define PTE_S2_RDWR (_AT(pteval_t, 3) << 6) /* HAP[2:1] */

	#define PMD_S2_RDONLY (_AT(pmdval_t, 1) << 6) /* HAP[2:1] */
	#define PMD_S2_RDWR (_AT(pmdval_t, 3) << 6) /* HAP[2:1] */

	/*
	* Memory Attribute override for Stage-2 (MemAttr[3:0])
	*/
	#define PTE_S2_MEMATTR(t) (_AT(pteval_t, (t)) << 2)
	#define PTE_S2_MEMATTR_MASK (_AT(pteval_t, 0xf) << 2)

	/*
	* EL2/HYP PTE/PMD definitions
	*/
	#define PMD_HYP PMD_SECT_USER
	#define PTE_HYP PTE_USER

	/*
	* Highest possible physical address supported.
	*/
	#define PHYS_MASK_SHIFT (48)
	#define PHYS_MASK ((UL(1) << PHYS_MASK_SHIFT) - 1)

	/*
	* TCR flags.
	*/
	#define TCR_T0SZ_OFFSET 0
	#define TCR_T1SZ_OFFSET 16
	#define TCR_T0SZ(x) ((UL(64) - (x)) << TCR_T0SZ_OFFSET)
	#define TCR_T1SZ(x) ((UL(64) - (x)) << TCR_T1SZ_OFFSET)
	#define TCR_TxSZ(x) (TCR_T0SZ(x) \| TCR_T1SZ(x))
	#define TCR_TxSZ_WIDTH 6
	#define TCR_IRGN_NC ((UL(0) << 8) \| (UL(0) << 24))
	#define TCR_IRGN_WBWA ((UL(1) << 8) \| (UL(1) << 24))
	#define TCR_IRGN_WT ((UL(2) << 8) \| (UL(2) << 24))
	#define TCR_IRGN_WBnWA ((UL(3) << 8) \| (UL(3) << 24))
	#define TCR_IRGN_MASK ((UL(3) << 8) \| (UL(3) << 24))
	#define TCR_ORGN_NC ((UL(0) << 10) \| (UL(0) << 26))
	#define TCR_ORGN_WBWA ((UL(1) << 10) \| (UL(1) << 26))
	#define TCR_ORGN_WT ((UL(2) << 10) \| (UL(2) << 26))
	#define TCR_ORGN_WBnWA ((UL(3) << 10) \| (UL(3) << 26))
	#define TCR_ORGN_MASK ((UL(3) << 10) \| (UL(3) << 26))
	#define TCR_SHARED ((UL(3) << 12) \| (UL(3) << 28))
	#define TCR_TG0_4K (UL(0) << 14)
	#define TCR_TG0_64K (UL(1) << 14)
	#define TCR_TG0_16K (UL(2) << 14)
	#define TCR_TG1_16K (UL(1) << 30)
	#define TCR_TG1_4K (UL(2) << 30)
	#define TCR_TG1_64K (UL(3) << 30)
	#define TCR_ASID16 (UL(1) << 36)
	#define TCR_TBI0 (UL(1) << 37)
	#define TCR_HA (UL(1) << 39)
	#define TCR_HD (UL(1) << 40)

	#endif