include/lib/xlat_tables/xlat_tables_defs.h - filogic/atf - Gitiles

 /*
  * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */

 #ifndef XLAT_TABLES_DEFS_H
 #define XLAT_TABLES_DEFS_H

 #include <arch.h>
 #include <lib/utils_def.h>
 #include <lib/xlat_tables/xlat_mmu_helpers.h>

 /* Miscellaneous MMU related constants */
 #define NUM_2MB_IN_GB		(U(1) << 9)
 #define NUM_4K_IN_2MB		(U(1) << 9)
 #define NUM_GB_IN_4GB		(U(1) << 2)

 #define TWO_MB_SHIFT		U(21)
 #define ONE_GB_SHIFT		U(30)
 #define FOUR_KB_SHIFT		U(12)

 #define ONE_GB_INDEX(x)		((x) >> ONE_GB_SHIFT)
 #define TWO_MB_INDEX(x)		((x) >> TWO_MB_SHIFT)
 #define FOUR_KB_INDEX(x)	((x) >> FOUR_KB_SHIFT)

 #define PAGE_SIZE_4KB		U(4096)
 #define PAGE_SIZE_16KB		U(16384)
 #define PAGE_SIZE_64KB		U(65536)

 #define INVALID_DESC		U(0x0)
 /*
  * A block descriptor points to a region of memory bigger than the granule size
  * (e.g. a 2MB region when the granule size is 4KB).
  */
 #define BLOCK_DESC		U(0x1) /* Table levels 0-2 */
 /* A table descriptor points to the next level of translation table. */
 #define TABLE_DESC		U(0x3) /* Table levels 0-2 */
 /*
  * A page descriptor points to a page, i.e. a memory region whose size is the
  * translation granule size (e.g. 4KB).
  */
 #define PAGE_DESC		U(0x3) /* Table level 3 */

 #define DESC_MASK		U(0x3)

 #define FIRST_LEVEL_DESC_N	ONE_GB_SHIFT
 #define SECOND_LEVEL_DESC_N	TWO_MB_SHIFT
 #define THIRD_LEVEL_DESC_N	FOUR_KB_SHIFT

 /* XN: Translation regimes that support one VA range (EL2 and EL3). */
 #define XN			(ULL(1) << 2)
 /* UXN, PXN: Translation regimes that support two VA ranges (EL1&0). */
 #define UXN			(ULL(1) << 2)
 #define PXN			(ULL(1) << 1)
 #define CONT_HINT		(ULL(1) << 0)
 #define UPPER_ATTRS(x)		(((x) & ULL(0x7)) << 52)

 #define NON_GLOBAL		(U(1) << 9)
 #define ACCESS_FLAG		(U(1) << 8)
 #define NSH			(U(0x0) << 6)
 #define OSH			(U(0x2) << 6)
 #define ISH			(U(0x3) << 6)

 #define TABLE_ADDR_MASK		ULL(0x0000FFFFFFFFF000)

 /*
  * The ARMv8-A architecture allows translation granule sizes of 4KB, 16KB or
  * 64KB. However, only 4KB are supported at the moment.
  */
 #define PAGE_SIZE_SHIFT		FOUR_KB_SHIFT
 #define PAGE_SIZE		(U(1) << PAGE_SIZE_SHIFT)
 #define PAGE_SIZE_MASK		(PAGE_SIZE - U(1))
 #define IS_PAGE_ALIGNED(addr)	(((addr) & PAGE_SIZE_MASK) == U(0))

 #define XLAT_ENTRY_SIZE_SHIFT	U(3) /* Each MMU table entry is 8 bytes (1 << 3) */
 #define XLAT_ENTRY_SIZE		(U(1) << XLAT_ENTRY_SIZE_SHIFT)

 #define XLAT_TABLE_SIZE_SHIFT	PAGE_SIZE_SHIFT /* Size of one complete table */
 #define XLAT_TABLE_SIZE		(U(1) << XLAT_TABLE_SIZE_SHIFT)

 #define XLAT_TABLE_LEVEL_MAX	U(3)

 /* Values for number of entries in each MMU translation table */
 #define XLAT_TABLE_ENTRIES_SHIFT (XLAT_TABLE_SIZE_SHIFT - XLAT_ENTRY_SIZE_SHIFT)
 #define XLAT_TABLE_ENTRIES	(U(1) << XLAT_TABLE_ENTRIES_SHIFT)
 #define XLAT_TABLE_ENTRIES_MASK	(XLAT_TABLE_ENTRIES - U(1))

 /* Values to convert a memory address to an index into a translation table */
 #define L3_XLAT_ADDRESS_SHIFT	PAGE_SIZE_SHIFT
 #define L2_XLAT_ADDRESS_SHIFT	(L3_XLAT_ADDRESS_SHIFT + XLAT_TABLE_ENTRIES_SHIFT)
 #define L1_XLAT_ADDRESS_SHIFT	(L2_XLAT_ADDRESS_SHIFT + XLAT_TABLE_ENTRIES_SHIFT)
 #define L0_XLAT_ADDRESS_SHIFT	(L1_XLAT_ADDRESS_SHIFT + XLAT_TABLE_ENTRIES_SHIFT)
 #define XLAT_ADDR_SHIFT(level)	(PAGE_SIZE_SHIFT + \
 		  ((XLAT_TABLE_LEVEL_MAX - (level)) * XLAT_TABLE_ENTRIES_SHIFT))

 #define XLAT_BLOCK_SIZE(level)	(UL(1) << XLAT_ADDR_SHIFT(level))
 /* Mask to get the bits used to index inside a block of a certain level */
 #define XLAT_BLOCK_MASK(level)	(XLAT_BLOCK_SIZE(level) - UL(1))
 /* Mask to get the address bits common to a block of a certain table level*/
 #define XLAT_ADDR_MASK(level)	(~XLAT_BLOCK_MASK(level))
 /*
  * Extract from the given virtual address the index into the given lookup level.
  * This macro assumes the system is using the 4KB translation granule.
  */
 #define XLAT_TABLE_IDX(virtual_addr, level)	\
 	(((virtual_addr) >> XLAT_ADDR_SHIFT(level)) & ULL(0x1FF))

 /*
  * The ARMv8 translation table descriptor format defines AP[2:1] as the Access
  * Permissions bits, and does not define an AP[0] bit.
  *
  * AP[1] is valid only for a stage 1 translation that supports two VA ranges
  * (i.e. in the ARMv8A.0 architecture, that is the S-EL1&0 regime). It is RES1
  * when stage 1 translations can only support one VA range.
  */
 #define AP2_SHIFT			U(0x7)
 #define AP2_RO				ULL(0x1)
 #define AP2_RW				ULL(0x0)

 #define AP1_SHIFT			U(0x6)
 #define AP1_ACCESS_UNPRIVILEGED		ULL(0x1)
 #define AP1_NO_ACCESS_UNPRIVILEGED	ULL(0x0)
 #define AP1_RES1			ULL(0x1)

 /*
  * The following definitions must all be passed to the LOWER_ATTRS() macro to
  * get the right bitmask.
  */
 #define AP_RO				(AP2_RO << 5)
 #define AP_RW				(AP2_RW << 5)
 #define AP_ACCESS_UNPRIVILEGED		(AP1_ACCESS_UNPRIVILEGED    << 4)
 #define AP_NO_ACCESS_UNPRIVILEGED	(AP1_NO_ACCESS_UNPRIVILEGED << 4)
 #define AP_ONE_VA_RANGE_RES1		(AP1_RES1 << 4)
 #define NS				(U(0x1) << 3)
 #define ATTR_NON_CACHEABLE_INDEX	ULL(0x2)
 #define ATTR_DEVICE_INDEX		ULL(0x1)
 #define ATTR_IWBWA_OWBWA_NTR_INDEX	ULL(0x0)
 #define LOWER_ATTRS(x)			(((x) & U(0xfff)) << 2)

 /* Normal Memory, Outer Write-Through non-transient, Inner Non-cacheable */
 #define ATTR_NON_CACHEABLE		MAKE_MAIR_NORMAL_MEMORY(MAIR_NORM_NC, MAIR_NORM_NC)
 /* Device-nGnRE */
 #define ATTR_DEVICE			MAIR_DEV_nGnRE
 /* Normal Memory, Outer Write-Back non-transient, Inner Write-Back non-transient */
 #define ATTR_IWBWA_OWBWA_NTR		MAKE_MAIR_NORMAL_MEMORY(MAIR_NORM_WB_NTR_RWA, MAIR_NORM_WB_NTR_RWA)
 #define MAIR_ATTR_SET(attr, index)	((attr) << ((index) << 3))
 #define ATTR_INDEX_MASK			U(0x3)
 #define ATTR_INDEX_GET(attr)		(((attr) >> 2) & ATTR_INDEX_MASK)

 /*
  * Shift values for the attributes fields in a block or page descriptor.
  * See section D4.3.3 in the ARMv8-A ARM (issue B.a).
  */

 /* Memory attributes index field, AttrIndx[2:0]. */
 #define ATTR_INDEX_SHIFT		2
 /* Non-secure bit, NS. */
 #define NS_SHIFT			5
 /* Shareability field, SH[1:0] */
 #define SHAREABILITY_SHIFT		8
 /* The Access Flag, AF. */
 #define ACCESS_FLAG_SHIFT		10
 /* The not global bit, nG. */
 #define NOT_GLOBAL_SHIFT		11
 /* Contiguous hint bit. */
 #define CONT_HINT_SHIFT			52
 /* Execute-never bits, XN. */
 #define PXN_SHIFT			53
 #define XN_SHIFT			54
 #define UXN_SHIFT			XN_SHIFT

 #endif /* XLAT_TABLES_DEFS_H */
	/*
	* Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
	*
	* SPDX-License-Identifier: BSD-3-Clause
	*/

	#ifndef XLAT_TABLES_DEFS_H
	#define XLAT_TABLES_DEFS_H

	#include <arch.h>
	#include <lib/utils_def.h>
	#include <lib/xlat_tables/xlat_mmu_helpers.h>

	/* Miscellaneous MMU related constants */
	#define NUM_2MB_IN_GB (U(1) << 9)
	#define NUM_4K_IN_2MB (U(1) << 9)
	#define NUM_GB_IN_4GB (U(1) << 2)

	#define TWO_MB_SHIFT U(21)
	#define ONE_GB_SHIFT U(30)
	#define FOUR_KB_SHIFT U(12)

	#define ONE_GB_INDEX(x) ((x) >> ONE_GB_SHIFT)
	#define TWO_MB_INDEX(x) ((x) >> TWO_MB_SHIFT)
	#define FOUR_KB_INDEX(x) ((x) >> FOUR_KB_SHIFT)

	#define PAGE_SIZE_4KB U(4096)
	#define PAGE_SIZE_16KB U(16384)
	#define PAGE_SIZE_64KB U(65536)

	#define INVALID_DESC U(0x0)
	/*
	* A block descriptor points to a region of memory bigger than the granule size
	* (e.g. a 2MB region when the granule size is 4KB).
	*/
	#define BLOCK_DESC U(0x1) /* Table levels 0-2 */
	/* A table descriptor points to the next level of translation table. */
	#define TABLE_DESC U(0x3) /* Table levels 0-2 */
	/*
	* A page descriptor points to a page, i.e. a memory region whose size is the
	* translation granule size (e.g. 4KB).
	*/
	#define PAGE_DESC U(0x3) /* Table level 3 */

	#define DESC_MASK U(0x3)

	#define FIRST_LEVEL_DESC_N ONE_GB_SHIFT
	#define SECOND_LEVEL_DESC_N TWO_MB_SHIFT
	#define THIRD_LEVEL_DESC_N FOUR_KB_SHIFT

	/* XN: Translation regimes that support one VA range (EL2 and EL3). */
	#define XN (ULL(1) << 2)
	/* UXN, PXN: Translation regimes that support two VA ranges (EL1&0). */
	#define UXN (ULL(1) << 2)
	#define PXN (ULL(1) << 1)
	#define CONT_HINT (ULL(1) << 0)
	#define UPPER_ATTRS(x) (((x) & ULL(0x7)) << 52)

	#define NON_GLOBAL (U(1) << 9)
	#define ACCESS_FLAG (U(1) << 8)
	#define NSH (U(0x0) << 6)
	#define OSH (U(0x2) << 6)
	#define ISH (U(0x3) << 6)

	#define TABLE_ADDR_MASK ULL(0x0000FFFFFFFFF000)

	/*
	* The ARMv8-A architecture allows translation granule sizes of 4KB, 16KB or
	* 64KB. However, only 4KB are supported at the moment.
	*/
	#define PAGE_SIZE_SHIFT FOUR_KB_SHIFT
	#define PAGE_SIZE (U(1) << PAGE_SIZE_SHIFT)
	#define PAGE_SIZE_MASK (PAGE_SIZE - U(1))
	#define IS_PAGE_ALIGNED(addr) (((addr) & PAGE_SIZE_MASK) == U(0))

	#define XLAT_ENTRY_SIZE_SHIFT U(3) /* Each MMU table entry is 8 bytes (1 << 3) */
	#define XLAT_ENTRY_SIZE (U(1) << XLAT_ENTRY_SIZE_SHIFT)

	#define XLAT_TABLE_SIZE_SHIFT PAGE_SIZE_SHIFT /* Size of one complete table */
	#define XLAT_TABLE_SIZE (U(1) << XLAT_TABLE_SIZE_SHIFT)

	#define XLAT_TABLE_LEVEL_MAX U(3)

	/* Values for number of entries in each MMU translation table */
	#define XLAT_TABLE_ENTRIES_SHIFT (XLAT_TABLE_SIZE_SHIFT - XLAT_ENTRY_SIZE_SHIFT)
	#define XLAT_TABLE_ENTRIES (U(1) << XLAT_TABLE_ENTRIES_SHIFT)
	#define XLAT_TABLE_ENTRIES_MASK (XLAT_TABLE_ENTRIES - U(1))

	/* Values to convert a memory address to an index into a translation table */
	#define L3_XLAT_ADDRESS_SHIFT PAGE_SIZE_SHIFT
	#define L2_XLAT_ADDRESS_SHIFT (L3_XLAT_ADDRESS_SHIFT + XLAT_TABLE_ENTRIES_SHIFT)
	#define L1_XLAT_ADDRESS_SHIFT (L2_XLAT_ADDRESS_SHIFT + XLAT_TABLE_ENTRIES_SHIFT)
	#define L0_XLAT_ADDRESS_SHIFT (L1_XLAT_ADDRESS_SHIFT + XLAT_TABLE_ENTRIES_SHIFT)
	#define XLAT_ADDR_SHIFT(level) (PAGE_SIZE_SHIFT + \
	((XLAT_TABLE_LEVEL_MAX - (level)) * XLAT_TABLE_ENTRIES_SHIFT))

	#define XLAT_BLOCK_SIZE(level) (UL(1) << XLAT_ADDR_SHIFT(level))
	/* Mask to get the bits used to index inside a block of a certain level */
	#define XLAT_BLOCK_MASK(level) (XLAT_BLOCK_SIZE(level) - UL(1))
	/* Mask to get the address bits common to a block of a certain table level*/
	#define XLAT_ADDR_MASK(level) (~XLAT_BLOCK_MASK(level))
	/*
	* Extract from the given virtual address the index into the given lookup level.
	* This macro assumes the system is using the 4KB translation granule.
	*/
	#define XLAT_TABLE_IDX(virtual_addr, level) \
	(((virtual_addr) >> XLAT_ADDR_SHIFT(level)) & ULL(0x1FF))

	/*
	* The ARMv8 translation table descriptor format defines AP[2:1] as the Access
	* Permissions bits, and does not define an AP[0] bit.
	*
	* AP[1] is valid only for a stage 1 translation that supports two VA ranges
	* (i.e. in the ARMv8A.0 architecture, that is the S-EL1&0 regime). It is RES1
	* when stage 1 translations can only support one VA range.
	*/
	#define AP2_SHIFT U(0x7)
	#define AP2_RO ULL(0x1)
	#define AP2_RW ULL(0x0)

	#define AP1_SHIFT U(0x6)
	#define AP1_ACCESS_UNPRIVILEGED ULL(0x1)
	#define AP1_NO_ACCESS_UNPRIVILEGED ULL(0x0)
	#define AP1_RES1 ULL(0x1)

	/*
	* The following definitions must all be passed to the LOWER_ATTRS() macro to
	* get the right bitmask.
	*/
	#define AP_RO (AP2_RO << 5)
	#define AP_RW (AP2_RW << 5)
	#define AP_ACCESS_UNPRIVILEGED (AP1_ACCESS_UNPRIVILEGED << 4)
	#define AP_NO_ACCESS_UNPRIVILEGED (AP1_NO_ACCESS_UNPRIVILEGED << 4)
	#define AP_ONE_VA_RANGE_RES1 (AP1_RES1 << 4)
	#define NS (U(0x1) << 3)
	#define ATTR_NON_CACHEABLE_INDEX ULL(0x2)
	#define ATTR_DEVICE_INDEX ULL(0x1)
	#define ATTR_IWBWA_OWBWA_NTR_INDEX ULL(0x0)
	#define LOWER_ATTRS(x) (((x) & U(0xfff)) << 2)

	/* Normal Memory, Outer Write-Through non-transient, Inner Non-cacheable */
	#define ATTR_NON_CACHEABLE MAKE_MAIR_NORMAL_MEMORY(MAIR_NORM_NC, MAIR_NORM_NC)
	/* Device-nGnRE */
	#define ATTR_DEVICE MAIR_DEV_nGnRE
	/* Normal Memory, Outer Write-Back non-transient, Inner Write-Back non-transient */
	#define ATTR_IWBWA_OWBWA_NTR MAKE_MAIR_NORMAL_MEMORY(MAIR_NORM_WB_NTR_RWA, MAIR_NORM_WB_NTR_RWA)
	#define MAIR_ATTR_SET(attr, index) ((attr) << ((index) << 3))
	#define ATTR_INDEX_MASK U(0x3)
	#define ATTR_INDEX_GET(attr) (((attr) >> 2) & ATTR_INDEX_MASK)

	/*
	* Shift values for the attributes fields in a block or page descriptor.
	* See section D4.3.3 in the ARMv8-A ARM (issue B.a).
	*/

	/* Memory attributes index field, AttrIndx[2:0]. */
	#define ATTR_INDEX_SHIFT 2
	/* Non-secure bit, NS. */
	#define NS_SHIFT 5
	/* Shareability field, SH[1:0] */
	#define SHAREABILITY_SHIFT 8
	/* The Access Flag, AF. */
	#define ACCESS_FLAG_SHIFT 10
	/* The not global bit, nG. */
	#define NOT_GLOBAL_SHIFT 11
	/* Contiguous hint bit. */
	#define CONT_HINT_SHIFT 52
	/* Execute-never bits, XN. */
	#define PXN_SHIFT 53
	#define XN_SHIFT 54
	#define UXN_SHIFT XN_SHIFT

	#endif /* XLAT_TABLES_DEFS_H */