Antonio Nino Diaz | 233c7c1 | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 1 | /* |
Antonio Nino Diaz | b9ae5db | 2018-05-02 11:23:56 +0100 | [diff] [blame] | 2 | * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved. |
Antonio Nino Diaz | 233c7c1 | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 3 | * |
dp-arm | fa3cf0b | 2017-05-03 09:38:09 +0100 | [diff] [blame] | 4 | * SPDX-License-Identifier: BSD-3-Clause |
Antonio Nino Diaz | 233c7c1 | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 5 | */ |
| 6 | |
| 7 | #include <arch.h> |
| 8 | #include <arch_helpers.h> |
| 9 | #include <assert.h> |
Antonio Nino Diaz | 233c7c1 | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 10 | #include <cassert.h> |
Antonio Nino Diaz | 233c7c1 | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 11 | #include <sys/types.h> |
Isla Mitchell | c4a1a07 | 2017-08-07 11:20:13 +0100 | [diff] [blame] | 12 | #include <utils_def.h> |
Antonio Nino Diaz | 233c7c1 | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 13 | #include <xlat_tables_v2.h> |
| 14 | #include "../xlat_tables_private.h" |
| 15 | |
Antonio Nino Diaz | 4413ad5 | 2018-06-11 13:40:32 +0100 | [diff] [blame] | 16 | /* |
| 17 | * Returns 1 if the provided granule size is supported, 0 otherwise. |
| 18 | */ |
| 19 | int xlat_arch_is_granule_size_supported(size_t size) |
| 20 | { |
| 21 | u_register_t id_aa64mmfr0_el1 = read_id_aa64mmfr0_el1(); |
| 22 | |
| 23 | if (size == (4U * 1024U)) { |
| 24 | return ((id_aa64mmfr0_el1 >> ID_AA64MMFR0_EL1_TGRAN4_SHIFT) & |
| 25 | ID_AA64MMFR0_EL1_TGRAN4_MASK) == |
| 26 | ID_AA64MMFR0_EL1_TGRAN4_SUPPORTED; |
| 27 | } else if (size == (16U * 1024U)) { |
| 28 | return ((id_aa64mmfr0_el1 >> ID_AA64MMFR0_EL1_TGRAN16_SHIFT) & |
| 29 | ID_AA64MMFR0_EL1_TGRAN16_MASK) == |
| 30 | ID_AA64MMFR0_EL1_TGRAN16_SUPPORTED; |
| 31 | } else if (size == (64U * 1024U)) { |
| 32 | return ((id_aa64mmfr0_el1 >> ID_AA64MMFR0_EL1_TGRAN64_SHIFT) & |
| 33 | ID_AA64MMFR0_EL1_TGRAN64_MASK) == |
| 34 | ID_AA64MMFR0_EL1_TGRAN64_SUPPORTED; |
| 35 | } |
| 36 | |
| 37 | return 0; |
| 38 | } |
| 39 | |
| 40 | size_t xlat_arch_get_max_supported_granule_size(void) |
| 41 | { |
| 42 | if (xlat_arch_is_granule_size_supported(64U * 1024U)) { |
| 43 | return 64U * 1024U; |
| 44 | } else if (xlat_arch_is_granule_size_supported(16U * 1024U)) { |
| 45 | return 16U * 1024U; |
| 46 | } else { |
| 47 | assert(xlat_arch_is_granule_size_supported(4U * 1024U)); |
| 48 | return 4U * 1024U; |
| 49 | } |
| 50 | } |
| 51 | |
Antonio Nino Diaz | bafc753 | 2017-10-25 11:53:25 +0100 | [diff] [blame] | 52 | unsigned long long tcr_physical_addr_size_bits(unsigned long long max_addr) |
Antonio Nino Diaz | 233c7c1 | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 53 | { |
| 54 | /* Physical address can't exceed 48 bits */ |
| 55 | assert((max_addr & ADDR_MASK_48_TO_63) == 0); |
| 56 | |
| 57 | /* 48 bits address */ |
| 58 | if (max_addr & ADDR_MASK_44_TO_47) |
| 59 | return TCR_PS_BITS_256TB; |
| 60 | |
| 61 | /* 44 bits address */ |
| 62 | if (max_addr & ADDR_MASK_42_TO_43) |
| 63 | return TCR_PS_BITS_16TB; |
| 64 | |
| 65 | /* 42 bits address */ |
| 66 | if (max_addr & ADDR_MASK_40_TO_41) |
| 67 | return TCR_PS_BITS_4TB; |
| 68 | |
| 69 | /* 40 bits address */ |
| 70 | if (max_addr & ADDR_MASK_36_TO_39) |
| 71 | return TCR_PS_BITS_1TB; |
| 72 | |
| 73 | /* 36 bits address */ |
| 74 | if (max_addr & ADDR_MASK_32_TO_35) |
| 75 | return TCR_PS_BITS_64GB; |
| 76 | |
| 77 | return TCR_PS_BITS_4GB; |
| 78 | } |
| 79 | |
Antonio Nino Diaz | 3759e3f | 2017-03-22 15:48:51 +0000 | [diff] [blame] | 80 | #if ENABLE_ASSERTIONS |
Antonio Nino Diaz | b9ae5db | 2018-05-02 11:23:56 +0100 | [diff] [blame] | 81 | /* |
| 82 | * Physical Address ranges supported in the AArch64 Memory Model. Value 0b110 is |
| 83 | * supported in ARMv8.2 onwards. |
| 84 | */ |
Antonio Nino Diaz | 233c7c1 | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 85 | static const unsigned int pa_range_bits_arr[] = { |
| 86 | PARANGE_0000, PARANGE_0001, PARANGE_0010, PARANGE_0011, PARANGE_0100, |
Antonio Nino Diaz | b9ae5db | 2018-05-02 11:23:56 +0100 | [diff] [blame] | 87 | PARANGE_0101, PARANGE_0110 |
Antonio Nino Diaz | 233c7c1 | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 88 | }; |
| 89 | |
Sandrine Bailleux | c5b6377 | 2017-05-31 13:31:48 +0100 | [diff] [blame] | 90 | unsigned long long xlat_arch_get_max_supported_pa(void) |
Antonio Nino Diaz | 233c7c1 | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 91 | { |
| 92 | u_register_t pa_range = read_id_aa64mmfr0_el1() & |
| 93 | ID_AA64MMFR0_EL1_PARANGE_MASK; |
| 94 | |
| 95 | /* All other values are reserved */ |
| 96 | assert(pa_range < ARRAY_SIZE(pa_range_bits_arr)); |
| 97 | |
David Cunado | c150312 | 2018-02-16 21:12:58 +0000 | [diff] [blame] | 98 | return (1ULL << pa_range_bits_arr[pa_range]) - 1ULL; |
Antonio Nino Diaz | 233c7c1 | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 99 | } |
Antonio Nino Diaz | 3759e3f | 2017-03-22 15:48:51 +0000 | [diff] [blame] | 100 | #endif /* ENABLE_ASSERTIONS*/ |
Antonio Nino Diaz | 233c7c1 | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 101 | |
Antonio Nino Diaz | dcf9d92 | 2017-10-04 16:52:15 +0100 | [diff] [blame] | 102 | int is_mmu_enabled_ctx(const xlat_ctx_t *ctx) |
Antonio Nino Diaz | 233c7c1 | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 103 | { |
Antonio Nino Diaz | dcf9d92 | 2017-10-04 16:52:15 +0100 | [diff] [blame] | 104 | if (ctx->xlat_regime == EL1_EL0_REGIME) { |
| 105 | assert(xlat_arch_current_el() >= 1); |
| 106 | return (read_sctlr_el1() & SCTLR_M_BIT) != 0; |
| 107 | } else { |
| 108 | assert(ctx->xlat_regime == EL3_REGIME); |
| 109 | assert(xlat_arch_current_el() >= 3); |
| 110 | return (read_sctlr_el3() & SCTLR_M_BIT) != 0; |
| 111 | } |
Antonio Nino Diaz | 233c7c1 | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 112 | } |
| 113 | |
Antonio Nino Diaz | 44d3c21 | 2018-07-05 08:11:48 +0100 | [diff] [blame] | 114 | uint64_t xlat_arch_regime_get_xn_desc(int xlat_regime) |
| 115 | { |
| 116 | if (xlat_regime == EL1_EL0_REGIME) { |
| 117 | return UPPER_ATTRS(UXN) | UPPER_ATTRS(PXN); |
| 118 | } else { |
| 119 | assert(xlat_regime == EL3_REGIME); |
| 120 | return UPPER_ATTRS(XN); |
| 121 | } |
| 122 | } |
Antonio Nino Diaz | dcf9d92 | 2017-10-04 16:52:15 +0100 | [diff] [blame] | 123 | |
Antonio Nino Diaz | ad5dc7f | 2018-07-11 09:46:45 +0100 | [diff] [blame] | 124 | void xlat_arch_tlbi_va(uintptr_t va, int xlat_regime) |
Douglas Raillard | 2d54579 | 2017-09-25 15:23:22 +0100 | [diff] [blame] | 125 | { |
Antonio Nino Diaz | ac99803 | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 126 | /* |
| 127 | * Ensure the translation table write has drained into memory before |
| 128 | * invalidating the TLB entry. |
| 129 | */ |
| 130 | dsbishst(); |
| 131 | |
Douglas Raillard | 2d54579 | 2017-09-25 15:23:22 +0100 | [diff] [blame] | 132 | /* |
| 133 | * This function only supports invalidation of TLB entries for the EL3 |
| 134 | * and EL1&0 translation regimes. |
| 135 | * |
| 136 | * Also, it is architecturally UNDEFINED to invalidate TLBs of a higher |
| 137 | * exception level (see section D4.9.2 of the ARM ARM rev B.a). |
| 138 | */ |
| 139 | if (xlat_regime == EL1_EL0_REGIME) { |
| 140 | assert(xlat_arch_current_el() >= 1); |
| 141 | tlbivaae1is(TLBI_ADDR(va)); |
| 142 | } else { |
| 143 | assert(xlat_regime == EL3_REGIME); |
| 144 | assert(xlat_arch_current_el() >= 3); |
| 145 | tlbivae3is(TLBI_ADDR(va)); |
| 146 | } |
Antonio Nino Diaz | ac99803 | 2017-02-27 17:23:54 +0000 | [diff] [blame] | 147 | } |
| 148 | |
| 149 | void xlat_arch_tlbi_va_sync(void) |
| 150 | { |
| 151 | /* |
| 152 | * A TLB maintenance instruction can complete at any time after |
| 153 | * it is issued, but is only guaranteed to be complete after the |
| 154 | * execution of DSB by the PE that executed the TLB maintenance |
| 155 | * instruction. After the TLB invalidate instruction is |
| 156 | * complete, no new memory accesses using the invalidated TLB |
| 157 | * entries will be observed by any observer of the system |
| 158 | * domain. See section D4.8.2 of the ARMv8 (issue k), paragraph |
| 159 | * "Ordering and completion of TLB maintenance instructions". |
| 160 | */ |
| 161 | dsbish(); |
| 162 | |
| 163 | /* |
| 164 | * The effects of a completed TLB maintenance instruction are |
| 165 | * only guaranteed to be visible on the PE that executed the |
| 166 | * instruction after the execution of an ISB instruction by the |
| 167 | * PE that executed the TLB maintenance instruction. |
| 168 | */ |
| 169 | isb(); |
| 170 | } |
| 171 | |
Antonio Nino Diaz | efabaa9 | 2017-04-27 13:30:22 +0100 | [diff] [blame] | 172 | int xlat_arch_current_el(void) |
| 173 | { |
| 174 | int el = GET_EL(read_CurrentEl()); |
| 175 | |
| 176 | assert(el > 0); |
| 177 | |
| 178 | return el; |
| 179 | } |
| 180 | |
Antonio Nino Diaz | 67f799e | 2018-07-15 16:42:01 +0100 | [diff] [blame] | 181 | void setup_mmu_cfg(uint64_t *params, unsigned int flags, |
| 182 | const uint64_t *base_table, unsigned long long max_pa, |
| 183 | uintptr_t max_va, int xlat_regime) |
Antonio Nino Diaz | 233c7c1 | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 184 | { |
Antonio Nino Diaz | 668d9ee | 2018-07-12 15:44:42 +0100 | [diff] [blame] | 185 | uint64_t mair, ttbr0, tcr; |
Jeenu Viswambharan | 58e8148 | 2018-04-27 15:06:57 +0100 | [diff] [blame] | 186 | uintptr_t virtual_addr_space_size; |
Sandrine Bailleux | 1423d05 | 2017-05-31 13:38:51 +0100 | [diff] [blame] | 187 | |
| 188 | /* Set attributes in the right indices of the MAIR. */ |
| 189 | mair = MAIR_ATTR_SET(ATTR_DEVICE, ATTR_DEVICE_INDEX); |
| 190 | mair |= MAIR_ATTR_SET(ATTR_IWBWA_OWBWA_NTR, ATTR_IWBWA_OWBWA_NTR_INDEX); |
| 191 | mair |= MAIR_ATTR_SET(ATTR_NON_CACHEABLE, ATTR_NON_CACHEABLE_INDEX); |
| 192 | |
Sandrine Bailleux | 1423d05 | 2017-05-31 13:38:51 +0100 | [diff] [blame] | 193 | /* |
Sandrine Bailleux | 1423d05 | 2017-05-31 13:38:51 +0100 | [diff] [blame] | 194 | * Limit the input address ranges and memory region sizes translated |
| 195 | * using TTBR0 to the given virtual address space size. |
| 196 | */ |
Jeenu Viswambharan | 58e8148 | 2018-04-27 15:06:57 +0100 | [diff] [blame] | 197 | assert(max_va < ((uint64_t) UINTPTR_MAX)); |
| 198 | |
| 199 | virtual_addr_space_size = max_va + 1; |
Sandrine Bailleux | 46c53a2 | 2017-07-11 15:11:10 +0100 | [diff] [blame] | 200 | assert(CHECK_VIRT_ADDR_SPACE_SIZE(virtual_addr_space_size)); |
Jeenu Viswambharan | 58e8148 | 2018-04-27 15:06:57 +0100 | [diff] [blame] | 201 | |
Sandrine Bailleux | 46c53a2 | 2017-07-11 15:11:10 +0100 | [diff] [blame] | 202 | /* |
Sandrine Bailleux | 12e8644 | 2017-07-19 10:11:13 +0100 | [diff] [blame] | 203 | * __builtin_ctzll(0) is undefined but here we are guaranteed that |
Sandrine Bailleux | 46c53a2 | 2017-07-11 15:11:10 +0100 | [diff] [blame] | 204 | * virtual_addr_space_size is in the range [1,UINTPTR_MAX]. |
| 205 | */ |
Jeenu Viswambharan | 58e8148 | 2018-04-27 15:06:57 +0100 | [diff] [blame] | 206 | tcr = (uint64_t) 64 - __builtin_ctzll(virtual_addr_space_size); |
Sandrine Bailleux | 1423d05 | 2017-05-31 13:38:51 +0100 | [diff] [blame] | 207 | |
| 208 | /* |
| 209 | * Set the cacheability and shareability attributes for memory |
| 210 | * associated with translation table walks. |
| 211 | */ |
Jeenu Viswambharan | 58e8148 | 2018-04-27 15:06:57 +0100 | [diff] [blame] | 212 | if ((flags & XLAT_TABLE_NC) != 0) { |
Sandrine Bailleux | 1423d05 | 2017-05-31 13:38:51 +0100 | [diff] [blame] | 213 | /* Inner & outer non-cacheable non-shareable. */ |
| 214 | tcr |= TCR_SH_NON_SHAREABLE | |
| 215 | TCR_RGN_OUTER_NC | TCR_RGN_INNER_NC; |
| 216 | } else { |
| 217 | /* Inner & outer WBWA & shareable. */ |
| 218 | tcr |= TCR_SH_INNER_SHAREABLE | |
| 219 | TCR_RGN_OUTER_WBA | TCR_RGN_INNER_WBA; |
| 220 | } |
| 221 | |
Sandrine Bailleux | c5b6377 | 2017-05-31 13:31:48 +0100 | [diff] [blame] | 222 | /* |
| 223 | * It is safer to restrict the max physical address accessible by the |
| 224 | * hardware as much as possible. |
| 225 | */ |
Antonio Nino Diaz | bafc753 | 2017-10-25 11:53:25 +0100 | [diff] [blame] | 226 | unsigned long long tcr_ps_bits = tcr_physical_addr_size_bits(max_pa); |
Sandrine Bailleux | c5b6377 | 2017-05-31 13:31:48 +0100 | [diff] [blame] | 227 | |
Antonio Nino Diaz | 9d596c4 | 2018-07-12 15:43:07 +0100 | [diff] [blame] | 228 | if (xlat_regime == EL1_EL0_REGIME) { |
| 229 | /* |
| 230 | * TCR_EL1.EPD1: Disable translation table walk for addresses |
| 231 | * that are translated using TTBR1_EL1. |
| 232 | */ |
| 233 | tcr |= TCR_EPD1_BIT | (tcr_ps_bits << TCR_EL1_IPS_SHIFT); |
| 234 | } else { |
| 235 | assert(xlat_regime == EL3_REGIME); |
| 236 | tcr |= TCR_EL3_RES1 | (tcr_ps_bits << TCR_EL3_PS_SHIFT); |
| 237 | } |
Jeenu Viswambharan | 58e8148 | 2018-04-27 15:06:57 +0100 | [diff] [blame] | 238 | |
Jeenu Viswambharan | 58e8148 | 2018-04-27 15:06:57 +0100 | [diff] [blame] | 239 | /* Set TTBR bits as well */ |
Antonio Nino Diaz | 668d9ee | 2018-07-12 15:44:42 +0100 | [diff] [blame] | 240 | ttbr0 = (uint64_t) base_table; |
| 241 | |
| 242 | #if ARM_ARCH_AT_LEAST(8, 2) |
| 243 | /* |
| 244 | * Enable CnP bit so as to share page tables with all PEs. This |
| 245 | * is mandatory for ARMv8.2 implementations. |
| 246 | */ |
| 247 | ttbr0 |= TTBR_CNP_BIT; |
| 248 | #endif |
Jeenu Viswambharan | 58e8148 | 2018-04-27 15:06:57 +0100 | [diff] [blame] | 249 | |
Antonio Nino Diaz | 67f799e | 2018-07-15 16:42:01 +0100 | [diff] [blame] | 250 | params[MMU_CFG_MAIR] = mair; |
| 251 | params[MMU_CFG_TCR] = tcr; |
| 252 | params[MMU_CFG_TTBR0] = ttbr0; |
Antonio Nino Diaz | 233c7c1 | 2017-03-08 14:40:23 +0000 | [diff] [blame] | 253 | } |