122 lines
4.2 KiB
C
122 lines
4.2 KiB
C
/*
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* Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef __XLAT_TABLES_DEFS_H__
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#define __XLAT_TABLES_DEFS_H__
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#include <utils_def.h>
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/* Miscellaneous MMU related constants */
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#define NUM_2MB_IN_GB (U(1) << 9)
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#define NUM_4K_IN_2MB (U(1) << 9)
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#define NUM_GB_IN_4GB (U(1) << 2)
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#define TWO_MB_SHIFT U(21)
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#define ONE_GB_SHIFT U(30)
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#define FOUR_KB_SHIFT U(12)
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#define ONE_GB_INDEX(x) ((x) >> ONE_GB_SHIFT)
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#define TWO_MB_INDEX(x) ((x) >> TWO_MB_SHIFT)
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#define FOUR_KB_INDEX(x) ((x) >> FOUR_KB_SHIFT)
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#define INVALID_DESC U(0x0)
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#define BLOCK_DESC U(0x1) /* Table levels 0-2 */
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#define TABLE_DESC U(0x3) /* Table levels 0-2 */
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#define PAGE_DESC U(0x3) /* Table level 3 */
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#define DESC_MASK U(0x3)
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#define FIRST_LEVEL_DESC_N ONE_GB_SHIFT
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#define SECOND_LEVEL_DESC_N TWO_MB_SHIFT
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#define THIRD_LEVEL_DESC_N FOUR_KB_SHIFT
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/* XN: Translation regimes that support one VA range (EL2 and EL3). */
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#define XN (ULL(1) << 2)
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/* UXN, PXN: Translation regimes that support two VA ranges (EL1&0). */
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#define UXN (ULL(1) << 2)
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#define PXN (ULL(1) << 1)
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#define CONT_HINT (ULL(1) << 0)
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#define UPPER_ATTRS(x) (((x) & ULL(0x7)) << 52)
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#define NON_GLOBAL (U(1) << 9)
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#define ACCESS_FLAG (U(1) << 8)
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#define NSH (U(0x0) << 6)
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#define OSH (U(0x2) << 6)
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#define ISH (U(0x3) << 6)
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#define TABLE_ADDR_MASK ULL(0x0000FFFFFFFFF000)
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/*
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* The ARMv8-A architecture allows translation granule sizes of 4KB, 16KB or
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* 64KB. However, TF only supports the 4KB case at the moment.
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*/
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#define PAGE_SIZE_SHIFT FOUR_KB_SHIFT
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#define PAGE_SIZE (U(1) << PAGE_SIZE_SHIFT)
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#define PAGE_SIZE_MASK (PAGE_SIZE - 1)
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#define IS_PAGE_ALIGNED(addr) (((addr) & PAGE_SIZE_MASK) == 0)
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#define XLAT_ENTRY_SIZE_SHIFT U(3) /* Each MMU table entry is 8 bytes (1 << 3) */
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#define XLAT_ENTRY_SIZE (U(1) << XLAT_ENTRY_SIZE_SHIFT)
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#define XLAT_TABLE_SIZE_SHIFT PAGE_SIZE_SHIFT /* Size of one complete table */
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#define XLAT_TABLE_SIZE (U(1) << XLAT_TABLE_SIZE_SHIFT)
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#define XLAT_TABLE_LEVEL_MAX U(3)
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/* Values for number of entries in each MMU translation table */
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#define XLAT_TABLE_ENTRIES_SHIFT (XLAT_TABLE_SIZE_SHIFT - XLAT_ENTRY_SIZE_SHIFT)
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#define XLAT_TABLE_ENTRIES (U(1) << XLAT_TABLE_ENTRIES_SHIFT)
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#define XLAT_TABLE_ENTRIES_MASK (XLAT_TABLE_ENTRIES - 1)
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/* Values to convert a memory address to an index into a translation table */
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#define L3_XLAT_ADDRESS_SHIFT PAGE_SIZE_SHIFT
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#define L2_XLAT_ADDRESS_SHIFT (L3_XLAT_ADDRESS_SHIFT + XLAT_TABLE_ENTRIES_SHIFT)
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#define L1_XLAT_ADDRESS_SHIFT (L2_XLAT_ADDRESS_SHIFT + XLAT_TABLE_ENTRIES_SHIFT)
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#define L0_XLAT_ADDRESS_SHIFT (L1_XLAT_ADDRESS_SHIFT + XLAT_TABLE_ENTRIES_SHIFT)
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#define XLAT_ADDR_SHIFT(level) (PAGE_SIZE_SHIFT + \
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((XLAT_TABLE_LEVEL_MAX - (level)) * XLAT_TABLE_ENTRIES_SHIFT))
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#define XLAT_BLOCK_SIZE(level) ((u_register_t)1 << XLAT_ADDR_SHIFT(level))
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/* Mask to get the bits used to index inside a block of a certain level */
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#define XLAT_BLOCK_MASK(level) (XLAT_BLOCK_SIZE(level) - 1)
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/* Mask to get the address bits common to a block of a certain table level*/
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#define XLAT_ADDR_MASK(level) (~XLAT_BLOCK_MASK(level))
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/*
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* AP[1] bit is ignored by hardware and is
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* treated as if it is One in EL2/EL3
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*/
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#define AP_RO (U(0x1) << 5)
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#define AP_RW (U(0x0) << 5)
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#define NS (U(0x1) << 3)
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#define ATTR_NON_CACHEABLE_INDEX U(0x2)
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#define ATTR_DEVICE_INDEX U(0x1)
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#define ATTR_IWBWA_OWBWA_NTR_INDEX U(0x0)
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#define LOWER_ATTRS(x) (((x) & U(0xfff)) << 2)
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/* Normal Memory, Outer Write-Through non-transient, Inner Non-cacheable */
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#define ATTR_NON_CACHEABLE U(0x44)
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/* Device-nGnRE */
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#define ATTR_DEVICE U(0x4)
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/* Normal Memory, Outer Write-Back non-transient, Inner Write-Back non-transient */
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#define ATTR_IWBWA_OWBWA_NTR U(0xff)
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#define MAIR_ATTR_SET(attr, index) ((attr) << ((index) << 3))
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#define ATTR_INDEX_MASK U(0x3)
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#define ATTR_INDEX_GET(attr) (((attr) >> 2) & ATTR_INDEX_MASK)
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/*
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* Flags to override default values used to program system registers while
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* enabling the MMU.
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*/
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#define DISABLE_DCACHE (U(1) << 0)
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/*
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* This flag marks the translation tables are Non-cacheable for MMU accesses.
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* If the flag is not specified, by default the tables are cacheable.
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*/
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#define XLAT_TABLE_NC (U(1) << 1)
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#endif /* __XLAT_TABLES_DEFS_H__ */
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