1 /* 2 * (C) Copyright 2013 3 * David Feng <fenghua@phytium.com.cn> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #ifndef _ASM_ARMV8_MMU_H_ 9 #define _ASM_ARMV8_MMU_H_ 10 11 #ifdef __ASSEMBLY__ 12 #define _AC(X, Y) X 13 #else 14 #define _AC(X, Y) (X##Y) 15 #endif 16 17 #define UL(x) _AC(x, UL) 18 19 /***************************************************************/ 20 /* 21 * The following definitions are related each other, shoud be 22 * calculated specifically. 23 */ 24 #define VA_BITS (42) /* 42 bits virtual address */ 25 26 /* PAGE_SHIFT determines the page size */ 27 #undef PAGE_SIZE 28 #define PAGE_SHIFT 16 29 #define PAGE_SIZE (1 << PAGE_SHIFT) 30 #define PAGE_MASK (~(PAGE_SIZE-1)) 31 32 /* 33 * section address mask and size definitions. 34 */ 35 #define SECTION_SHIFT 29 36 #define SECTION_SIZE (UL(1) << SECTION_SHIFT) 37 #define SECTION_MASK (~(SECTION_SIZE-1)) 38 /***************************************************************/ 39 40 /* 41 * Memory types 42 */ 43 #define MT_DEVICE_NGNRNE 0 44 #define MT_DEVICE_NGNRE 1 45 #define MT_DEVICE_GRE 2 46 #define MT_NORMAL_NC 3 47 #define MT_NORMAL 4 48 49 #define MEMORY_ATTRIBUTES ((0x00 << (MT_DEVICE_NGNRNE*8)) | \ 50 (0x04 << (MT_DEVICE_NGNRE*8)) | \ 51 (0x0c << (MT_DEVICE_GRE*8)) | \ 52 (0x44 << (MT_NORMAL_NC*8)) | \ 53 (UL(0xff) << (MT_NORMAL*8))) 54 55 /* 56 * Hardware page table definitions. 57 * 58 * Level 2 descriptor (PMD). 59 */ 60 #define PMD_TYPE_MASK (3 << 0) 61 #define PMD_TYPE_FAULT (0 << 0) 62 #define PMD_TYPE_TABLE (3 << 0) 63 #define PMD_TYPE_SECT (1 << 0) 64 65 /* 66 * Section 67 */ 68 #define PMD_SECT_S (3 << 8) 69 #define PMD_SECT_AF (1 << 10) 70 #define PMD_SECT_NG (1 << 11) 71 #define PMD_SECT_PXN (UL(1) << 53) 72 #define PMD_SECT_UXN (UL(1) << 54) 73 74 /* 75 * AttrIndx[2:0] 76 */ 77 #define PMD_ATTRINDX(t) ((t) << 2) 78 #define PMD_ATTRINDX_MASK (7 << 2) 79 80 /* 81 * TCR flags. 82 */ 83 #define TCR_T0SZ(x) ((64 - (x)) << 0) 84 #define TCR_IRGN_NC (0 << 8) 85 #define TCR_IRGN_WBWA (1 << 8) 86 #define TCR_IRGN_WT (2 << 8) 87 #define TCR_IRGN_WBNWA (3 << 8) 88 #define TCR_IRGN_MASK (3 << 8) 89 #define TCR_ORGN_NC (0 << 10) 90 #define TCR_ORGN_WBWA (1 << 10) 91 #define TCR_ORGN_WT (2 << 10) 92 #define TCR_ORGN_WBNWA (3 << 10) 93 #define TCR_ORGN_MASK (3 << 10) 94 #define TCR_SHARED_NON (0 << 12) 95 #define TCR_SHARED_OUTER (1 << 12) 96 #define TCR_SHARED_INNER (2 << 12) 97 #define TCR_TG0_4K (0 << 14) 98 #define TCR_TG0_64K (1 << 14) 99 #define TCR_TG0_16K (2 << 14) 100 #define TCR_EL1_IPS_BITS (UL(3) << 32) /* 42 bits physical address */ 101 #define TCR_EL2_IPS_BITS (3 << 16) /* 42 bits physical address */ 102 #define TCR_EL3_IPS_BITS (3 << 16) /* 42 bits physical address */ 103 104 /* PTWs cacheable, inner/outer WBWA and non-shareable */ 105 #define TCR_FLAGS (TCR_TG0_64K | \ 106 TCR_SHARED_NON | \ 107 TCR_ORGN_WBWA | \ 108 TCR_IRGN_WBWA | \ 109 TCR_T0SZ(VA_BITS)) 110 111 #ifndef __ASSEMBLY__ 112 void set_pgtable_section(u64 *page_table, u64 index, 113 u64 section, u64 memory_type); 114 static inline void set_ttbr_tcr_mair(int el, u64 table, u64 tcr, u64 attr) 115 { 116 asm volatile("dsb sy"); 117 if (el == 1) { 118 asm volatile("msr ttbr0_el1, %0" : : "r" (table) : "memory"); 119 asm volatile("msr tcr_el1, %0" : : "r" (tcr) : "memory"); 120 asm volatile("msr mair_el1, %0" : : "r" (attr) : "memory"); 121 } else if (el == 2) { 122 asm volatile("msr ttbr0_el2, %0" : : "r" (table) : "memory"); 123 asm volatile("msr tcr_el2, %0" : : "r" (tcr) : "memory"); 124 asm volatile("msr mair_el2, %0" : : "r" (attr) : "memory"); 125 } else if (el == 3) { 126 asm volatile("msr ttbr0_el3, %0" : : "r" (table) : "memory"); 127 asm volatile("msr tcr_el3, %0" : : "r" (tcr) : "memory"); 128 asm volatile("msr mair_el3, %0" : : "r" (attr) : "memory"); 129 } else { 130 hang(); 131 } 132 asm volatile("isb"); 133 } 134 #endif 135 #endif /* _ASM_ARMV8_MMU_H_ */ 136