1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * (C) Copyright 2013 4 * David Feng <fenghua@phytium.com.cn> 5 */ 6 7 #ifndef _ASM_ARMV8_MMU_H_ 8 #define _ASM_ARMV8_MMU_H_ 9 10 #include <linux/const.h> 11 12 /* 13 * block/section address mask and size definitions. 14 */ 15 16 /* PAGE_SHIFT determines the page size */ 17 #undef PAGE_SIZE 18 #define PAGE_SHIFT 12 19 #define PAGE_SIZE (1 << PAGE_SHIFT) 20 #define PAGE_MASK (~(PAGE_SIZE - 1)) 21 22 /***************************************************************/ 23 24 /* 25 * Memory types 26 */ 27 #define MT_DEVICE_NGNRNE 0 28 #define MT_DEVICE_NGNRE 1 29 #define MT_DEVICE_GRE 2 30 #define MT_NORMAL_NC 3 31 #define MT_NORMAL 4 32 33 #define MEMORY_ATTRIBUTES ((0x00 << (MT_DEVICE_NGNRNE * 8)) | \ 34 (0x04 << (MT_DEVICE_NGNRE * 8)) | \ 35 (0x0c << (MT_DEVICE_GRE * 8)) | \ 36 (0x44 << (MT_NORMAL_NC * 8)) | \ 37 (UL(0xff) << (MT_NORMAL * 8))) 38 39 /* 40 * Hardware page table definitions. 41 * 42 */ 43 44 #define PTE_TYPE_MASK (3 << 0) 45 #define PTE_TYPE_FAULT (0 << 0) 46 #define PTE_TYPE_TABLE (3 << 0) 47 #define PTE_TYPE_PAGE (3 << 0) 48 #define PTE_TYPE_BLOCK (1 << 0) 49 #define PTE_TYPE_VALID (1 << 0) 50 51 #define PTE_TABLE_PXN (1UL << 59) 52 #define PTE_TABLE_XN (1UL << 60) 53 #define PTE_TABLE_AP (1UL << 61) 54 #define PTE_TABLE_NS (1UL << 63) 55 56 /* 57 * Block 58 */ 59 #define PTE_BLOCK_MEMTYPE(x) ((x) << 2) 60 #define PTE_BLOCK_NS (1 << 5) 61 #define PTE_BLOCK_NON_SHARE (0 << 8) 62 #define PTE_BLOCK_OUTER_SHARE (2 << 8) 63 #define PTE_BLOCK_INNER_SHARE (3 << 8) 64 #define PTE_BLOCK_AF (1 << 10) 65 #define PTE_BLOCK_NG (1 << 11) 66 #define PTE_BLOCK_PXN (UL(1) << 53) 67 #define PTE_BLOCK_UXN (UL(1) << 54) 68 69 /* 70 * AttrIndx[2:0] 71 */ 72 #define PMD_ATTRINDX(t) ((t) << 2) 73 #define PMD_ATTRINDX_MASK (7 << 2) 74 #define PMD_ATTRMASK (PTE_BLOCK_PXN | \ 75 PTE_BLOCK_UXN | \ 76 PMD_ATTRINDX_MASK | \ 77 PTE_TYPE_VALID) 78 79 /* 80 * TCR flags. 81 */ 82 #define TCR_T0SZ(x) ((64 - (x)) << 0) 83 #define TCR_IRGN_NC (0 << 8) 84 #define TCR_IRGN_WBWA (1 << 8) 85 #define TCR_IRGN_WT (2 << 8) 86 #define TCR_IRGN_WBNWA (3 << 8) 87 #define TCR_IRGN_MASK (3 << 8) 88 #define TCR_ORGN_NC (0 << 10) 89 #define TCR_ORGN_WBWA (1 << 10) 90 #define TCR_ORGN_WT (2 << 10) 91 #define TCR_ORGN_WBNWA (3 << 10) 92 #define TCR_ORGN_MASK (3 << 10) 93 #define TCR_SHARED_NON (0 << 12) 94 #define TCR_SHARED_OUTER (2 << 12) 95 #define TCR_SHARED_INNER (3 << 12) 96 #define TCR_TG0_4K (0 << 14) 97 #define TCR_TG0_64K (1 << 14) 98 #define TCR_TG0_16K (2 << 14) 99 #define TCR_EPD1_DISABLE (1 << 23) 100 101 #define TCR_EL1_RSVD (1 << 31) 102 #define TCR_EL2_RSVD (1 << 31 | 1 << 23) 103 #define TCR_EL3_RSVD (1 << 31 | 1 << 23) 104 105 #ifndef __ASSEMBLY__ 106 static inline void set_ttbr_tcr_mair(int el, u64 table, u64 tcr, u64 attr) 107 { 108 asm volatile("dsb sy"); 109 if (el == 1) { 110 asm volatile("msr ttbr0_el1, %0" : : "r" (table) : "memory"); 111 asm volatile("msr tcr_el1, %0" : : "r" (tcr) : "memory"); 112 asm volatile("msr mair_el1, %0" : : "r" (attr) : "memory"); 113 } else if (el == 2) { 114 asm volatile("msr ttbr0_el2, %0" : : "r" (table) : "memory"); 115 asm volatile("msr tcr_el2, %0" : : "r" (tcr) : "memory"); 116 asm volatile("msr mair_el2, %0" : : "r" (attr) : "memory"); 117 } else if (el == 3) { 118 asm volatile("msr ttbr0_el3, %0" : : "r" (table) : "memory"); 119 asm volatile("msr tcr_el3, %0" : : "r" (tcr) : "memory"); 120 asm volatile("msr mair_el3, %0" : : "r" (attr) : "memory"); 121 } else { 122 hang(); 123 } 124 asm volatile("isb"); 125 } 126 127 struct mm_region { 128 u64 virt; 129 u64 phys; 130 u64 size; 131 u64 attrs; 132 }; 133 134 extern struct mm_region *mem_map; 135 void setup_pgtables(void); 136 u64 get_tcr(int el, u64 *pips, u64 *pva_bits); 137 #endif 138 139 #endif /* _ASM_ARMV8_MMU_H_ */ 140