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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2012 ARM Ltd.
*/
#ifndef __ASM_PGTABLE_HWDEF_H
#define __ASM_PGTABLE_HWDEF_H
#include <asm/memory.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 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.
*/
#define CONT_PTE_SHIFT (CONFIG_ARM64_CONT_PTE_SHIFT + PAGE_SHIFT)
#define CONT_PTES (1 << (CONT_PTE_SHIFT - PAGE_SHIFT))
#define CONT_PTE_SIZE (CONT_PTES * PAGE_SIZE)
#define CONT_PTE_MASK (~(CONT_PTE_SIZE - 1))
#define CONT_PMD_SHIFT (CONFIG_ARM64_CONT_PMD_SHIFT + PMD_SHIFT)
#define CONT_PMDS (1 << (CONT_PMD_SHIFT - PMD_SHIFT))
#define CONT_PMD_SIZE (CONT_PMDS * PMD_SIZE)
#define CONT_PMD_MASK (~(CONT_PMD_SIZE - 1))
/*
* Hardware page table definitions.
*
* Level 1 descriptor (PUD).
*/
#define PUD_TYPE_TABLE (_AT(pudval_t, 3) << 0)
#define PUD_TABLE_BIT (_AT(pudval_t, 1) << 1)
#define PUD_TYPE_MASK (_AT(pudval_t, 3) << 0)
#define PUD_TYPE_SECT (_AT(pudval_t, 1) << 0)
#define PUD_SECT_RDONLY (_AT(pudval_t, 1) << 7) /* AP[2] */
/*
* Level 2 descriptor (PMD).
*/
#define PMD_TYPE_MASK (_AT(pmdval_t, 3) << 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_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_VALID (_AT(pteval_t, 1) << 0)
#define PTE_TYPE_MASK (_AT(pteval_t, 3) << 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_GP (_AT(pteval_t, 1) << 50) /* BTI guarded */
#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 */
#define PTE_ADDR_LOW (((_AT(pteval_t, 1) << (48 - PAGE_SHIFT)) - 1) << PAGE_SHIFT)
#ifdef CONFIG_ARM64_PA_BITS_52
#define PTE_ADDR_HIGH (_AT(pteval_t, 0xf) << 12)
#define PTE_ADDR_MASK (PTE_ADDR_LOW | PTE_ADDR_HIGH)
#else
#define PTE_ADDR_MASK PTE_ADDR_LOW
#endif
/*
* 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)
/*
* Memory Attribute override for Stage-2 (MemAttr[3:0])
*/
#define PTE_S2_MEMATTR(t) (_AT(pteval_t, (t)) << 2)
/*
* Highest possible physical address supported.
*/
#define PHYS_MASK_SHIFT (CONFIG_ARM64_PA_BITS)
#define PHYS_MASK ((UL(1) << PHYS_MASK_SHIFT) - 1)
#define TTBR_CNP_BIT (UL(1) << 0)
/*
* 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_T0SZ_MASK (((UL(1) << TCR_TxSZ_WIDTH) - 1) << TCR_T0SZ_OFFSET)
#define TCR_T1SZ_MASK (((UL(1) << TCR_TxSZ_WIDTH) - 1) << TCR_T1SZ_OFFSET)
#define TCR_EPD0_SHIFT 7
#define TCR_EPD0_MASK (UL(1) << TCR_EPD0_SHIFT)
#define TCR_IRGN0_SHIFT 8
#define TCR_IRGN0_MASK (UL(3) << TCR_IRGN0_SHIFT)
#define TCR_IRGN0_NC (UL(0) << TCR_IRGN0_SHIFT)
#define TCR_IRGN0_WBWA (UL(1) << TCR_IRGN0_SHIFT)
#define TCR_IRGN0_WT (UL(2) << TCR_IRGN0_SHIFT)
#define TCR_IRGN0_WBnWA (UL(3) << TCR_IRGN0_SHIFT)
#define TCR_EPD1_SHIFT 23
#define TCR_EPD1_MASK (UL(1) << TCR_EPD1_SHIFT)
#define TCR_IRGN1_SHIFT 24
#define TCR_IRGN1_MASK (UL(3) << TCR_IRGN1_SHIFT)
#define TCR_IRGN1_NC (UL(0) << TCR_IRGN1_SHIFT)
#define TCR_IRGN1_WBWA (UL(1) << TCR_IRGN1_SHIFT)
#define TCR_IRGN1_WT (UL(2) << TCR_IRGN1_SHIFT)
#define TCR_IRGN1_WBnWA (UL(3) << TCR_IRGN1_SHIFT)
#define TCR_IRGN_NC (TCR_IRGN0_NC | TCR_IRGN1_NC)
#define TCR_IRGN_WBWA (TCR_IRGN0_WBWA | TCR_IRGN1_WBWA)
#define TCR_IRGN_WT (TCR_IRGN0_WT | TCR_IRGN1_WT)
#define TCR_IRGN_WBnWA (TCR_IRGN0_WBnWA | TCR_IRGN1_WBnWA)
#define TCR_IRGN_MASK (TCR_IRGN0_MASK | TCR_IRGN1_MASK)
#define TCR_ORGN0_SHIFT 10
#define TCR_ORGN0_MASK (UL(3) << TCR_ORGN0_SHIFT)
#define TCR_ORGN0_NC (UL(0) << TCR_ORGN0_SHIFT)
#define TCR_ORGN0_WBWA (UL(1) << TCR_ORGN0_SHIFT)
#define TCR_ORGN0_WT (UL(2) << TCR_ORGN0_SHIFT)
#define TCR_ORGN0_WBnWA (UL(3) << TCR_ORGN0_SHIFT)
#define TCR_ORGN1_SHIFT 26
#define TCR_ORGN1_MASK (UL(3) << TCR_ORGN1_SHIFT)
#define TCR_ORGN1_NC (UL(0) << TCR_ORGN1_SHIFT)
#define TCR_ORGN1_WBWA (UL(1) << TCR_ORGN1_SHIFT)
#define TCR_ORGN1_WT (UL(2) << TCR_ORGN1_SHIFT)
#define TCR_ORGN1_WBnWA (UL(3) << TCR_ORGN1_SHIFT)
#define TCR_ORGN_NC (TCR_ORGN0_NC | TCR_ORGN1_NC)
#define TCR_ORGN_WBWA (TCR_ORGN0_WBWA | TCR_ORGN1_WBWA)
#define TCR_ORGN_WT (TCR_ORGN0_WT | TCR_ORGN1_WT)
#define TCR_ORGN_WBnWA (TCR_ORGN0_WBnWA | TCR_ORGN1_WBnWA)
#define TCR_ORGN_MASK (TCR_ORGN0_MASK | TCR_ORGN1_MASK)
#define TCR_SH0_SHIFT 12
#define TCR_SH0_MASK (UL(3) << TCR_SH0_SHIFT)
#define TCR_SH0_INNER (UL(3) << TCR_SH0_SHIFT)
#define TCR_SH1_SHIFT 28
#define TCR_SH1_MASK (UL(3) << TCR_SH1_SHIFT)
#define TCR_SH1_INNER (UL(3) << TCR_SH1_SHIFT)
#define TCR_SHARED (TCR_SH0_INNER | TCR_SH1_INNER)
#define TCR_TG0_SHIFT 14
#define TCR_TG0_MASK (UL(3) << TCR_TG0_SHIFT)
#define TCR_TG0_4K (UL(0) << TCR_TG0_SHIFT)
#define TCR_TG0_64K (UL(1) << TCR_TG0_SHIFT)
#define TCR_TG0_16K (UL(2) << TCR_TG0_SHIFT)
#define TCR_TG1_SHIFT 30
#define TCR_TG1_MASK (UL(3) << TCR_TG1_SHIFT)
#define TCR_TG1_16K (UL(1) << TCR_TG1_SHIFT)
#define TCR_TG1_4K (UL(2) << TCR_TG1_SHIFT)
#define TCR_TG1_64K (UL(3) << TCR_TG1_SHIFT)
#define TCR_IPS_SHIFT 32
#define TCR_IPS_MASK (UL(7) << TCR_IPS_SHIFT)
#define TCR_A1 (UL(1) << 22)
#define TCR_ASID16 (UL(1) << 36)
#define TCR_TBI0 (UL(1) << 37)
#define TCR_TBI1 (UL(1) << 38)
#define TCR_HA (UL(1) << 39)
#define TCR_HD (UL(1) << 40)
#define TCR_NFD0 (UL(1) << 53)
#define TCR_NFD1 (UL(1) << 54)
#define TCR_E0PD0 (UL(1) << 55)
#define TCR_E0PD1 (UL(1) << 56)
/*
* TTBR.
*/
#ifdef CONFIG_ARM64_PA_BITS_52
/*
* This should be GENMASK_ULL(47, 2).
* TTBR_ELx[1] is RES0 in this configuration.
*/
#define TTBR_BADDR_MASK_52 (((UL(1) << 46) - 1) << 2)
#endif
#ifdef CONFIG_ARM64_VA_BITS_52
/* Must be at least 64-byte aligned to prevent corruption of the TTBR */
#define TTBR1_BADDR_4852_OFFSET (((UL(1) << (52 - PGDIR_SHIFT)) - \
(UL(1) << (48 - PGDIR_SHIFT))) * 8)
#endif
#endif
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