Isla Mitchell | ea84d6b | 2017-08-03 16:04:46 +0100 | [diff] [blame] | 1 | /* |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 2 | * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved. |
Isla Mitchell | ea84d6b | 2017-08-03 16:04:46 +0100 | [diff] [blame] | 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <arch.h> |
| 8 | #include <asm_macros.S> |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 9 | #include <neoverse_n1.h> |
Dimitris Papastamos | 89736dd | 2018-02-13 11:28:02 +0000 | [diff] [blame] | 10 | #include <cpuamu.h> |
Isla Mitchell | ea84d6b | 2017-08-03 16:04:46 +0100 | [diff] [blame] | 11 | #include <cpu_macros.S> |
Dimitris Papastamos | 89736dd | 2018-02-13 11:28:02 +0000 | [diff] [blame] | 12 | |
John Tsichritzis | fe6df39 | 2019-03-19 17:20:52 +0000 | [diff] [blame] | 13 | /* Hardware handled coherency */ |
| 14 | #if HW_ASSISTED_COHERENCY == 0 |
| 15 | #error "Neoverse N1 must be compiled with HW_ASSISTED_COHERENCY enabled" |
| 16 | #endif |
| 17 | |
John Tsichritzis | 7557c66 | 2019-06-03 13:54:30 +0100 | [diff] [blame] | 18 | /* 64-bit only core */ |
| 19 | #if CTX_INCLUDE_AARCH32_REGS == 1 |
| 20 | #error "Neoverse-N1 supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0" |
| 21 | #endif |
| 22 | |
Dimitris Papastamos | 7ca21db | 2018-03-26 16:46:01 +0100 | [diff] [blame] | 23 | /* -------------------------------------------------- |
Andre Przywara | b934740 | 2019-05-20 14:57:06 +0100 | [diff] [blame] | 24 | * Errata Workaround for Neoverse N1 Erratum 1043202. |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 25 | * This applies to revision r0p0 and r1p0 of Neoverse N1. |
Dimitris Papastamos | 7ca21db | 2018-03-26 16:46:01 +0100 | [diff] [blame] | 26 | * Inputs: |
| 27 | * x0: variant[4:7] and revision[0:3] of current cpu. |
| 28 | * Shall clobber: x0-x17 |
| 29 | * -------------------------------------------------- |
| 30 | */ |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 31 | func errata_n1_1043202_wa |
Dimitris Papastamos | 7ca21db | 2018-03-26 16:46:01 +0100 | [diff] [blame] | 32 | /* Compare x0 against revision r1p0 */ |
| 33 | mov x17, x30 |
| 34 | bl check_errata_1043202 |
| 35 | cbz x0, 1f |
| 36 | |
| 37 | /* Apply instruction patching sequence */ |
| 38 | ldr x0, =0x0 |
| 39 | msr CPUPSELR_EL3, x0 |
| 40 | ldr x0, =0xF3BF8F2F |
| 41 | msr CPUPOR_EL3, x0 |
| 42 | ldr x0, =0xFFFFFFFF |
| 43 | msr CPUPMR_EL3, x0 |
| 44 | ldr x0, =0x800200071 |
| 45 | msr CPUPCR_EL3, x0 |
| 46 | isb |
| 47 | 1: |
| 48 | ret x17 |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 49 | endfunc errata_n1_1043202_wa |
Dimitris Papastamos | 7ca21db | 2018-03-26 16:46:01 +0100 | [diff] [blame] | 50 | |
| 51 | func check_errata_1043202 |
| 52 | /* Applies to r0p0 and r1p0 */ |
| 53 | mov x1, #0x10 |
| 54 | b cpu_rev_var_ls |
| 55 | endfunc check_errata_1043202 |
| 56 | |
Sami Mujawar | a8722e9 | 2019-05-10 14:28:37 +0100 | [diff] [blame] | 57 | /* -------------------------------------------------- |
| 58 | * Disable speculative loads if Neoverse N1 supports |
| 59 | * SSBS. |
| 60 | * |
| 61 | * Shall clobber: x0. |
| 62 | * -------------------------------------------------- |
| 63 | */ |
| 64 | func neoverse_n1_disable_speculative_loads |
| 65 | /* Check if the PE implements SSBS */ |
| 66 | mrs x0, id_aa64pfr1_el1 |
| 67 | tst x0, #(ID_AA64PFR1_EL1_SSBS_MASK << ID_AA64PFR1_EL1_SSBS_SHIFT) |
| 68 | b.eq 1f |
| 69 | |
| 70 | /* Disable speculative loads */ |
| 71 | msr SSBS, xzr |
| 72 | isb |
| 73 | |
| 74 | 1: |
| 75 | ret |
| 76 | endfunc neoverse_n1_disable_speculative_loads |
| 77 | |
Andre Przywara | b934740 | 2019-05-20 14:57:06 +0100 | [diff] [blame] | 78 | /* -------------------------------------------------- |
lauwal01 | bd555f4 | 2019-06-24 11:23:50 -0500 | [diff] [blame] | 79 | * Errata Workaround for Neoverse N1 Errata #1073348 |
| 80 | * This applies to revision r0p0 and r1p0 of Neoverse N1. |
| 81 | * Inputs: |
| 82 | * x0: variant[4:7] and revision[0:3] of current cpu. |
| 83 | * Shall clobber: x0-x17 |
| 84 | * -------------------------------------------------- |
| 85 | */ |
| 86 | func errata_n1_1073348_wa |
| 87 | /* Compare x0 against revision r1p0 */ |
| 88 | mov x17, x30 |
| 89 | bl check_errata_1073348 |
| 90 | cbz x0, 1f |
| 91 | mrs x1, NEOVERSE_N1_CPUACTLR_EL1 |
| 92 | orr x1, x1, NEOVERSE_N1_CPUACTLR_EL1_BIT_6 |
| 93 | msr NEOVERSE_N1_CPUACTLR_EL1, x1 |
| 94 | isb |
| 95 | 1: |
| 96 | ret x17 |
| 97 | endfunc errata_n1_1073348_wa |
| 98 | |
| 99 | func check_errata_1073348 |
| 100 | /* Applies to r0p0 and r1p0 */ |
| 101 | mov x1, #0x10 |
| 102 | b cpu_rev_var_ls |
| 103 | endfunc check_errata_1073348 |
| 104 | |
| 105 | /* -------------------------------------------------- |
lauwal01 | 363ee3c | 2019-06-24 11:28:34 -0500 | [diff] [blame^] | 106 | * Errata Workaround for Neoverse N1 Errata #1130799 |
| 107 | * This applies to revision <=r2p0 of Neoverse N1. |
| 108 | * Inputs: |
| 109 | * x0: variant[4:7] and revision[0:3] of current cpu. |
| 110 | * Shall clobber: x0-x17 |
| 111 | * -------------------------------------------------- |
| 112 | */ |
| 113 | func errata_n1_1130799_wa |
| 114 | /* Compare x0 against revision r2p0 */ |
| 115 | mov x17, x30 |
| 116 | bl check_errata_1130799 |
| 117 | cbz x0, 1f |
| 118 | mrs x1, NEOVERSE_N1_CPUACTLR2_EL1 |
| 119 | orr x1, x1, NEOVERSE_N1_CPUACTLR2_EL1_BIT_59 |
| 120 | msr NEOVERSE_N1_CPUACTLR2_EL1, x1 |
| 121 | isb |
| 122 | 1: |
| 123 | ret x17 |
| 124 | endfunc errata_n1_1130799_wa |
| 125 | |
| 126 | func check_errata_1130799 |
| 127 | /* Applies to <=r2p0 */ |
| 128 | mov x1, #0x20 |
| 129 | b cpu_rev_var_ls |
| 130 | endfunc check_errata_1130799 |
| 131 | |
| 132 | /* -------------------------------------------------- |
Andre Przywara | b934740 | 2019-05-20 14:57:06 +0100 | [diff] [blame] | 133 | * Errata Workaround for Neoverse N1 Erratum 1315703. |
| 134 | * This applies to revision <= r3p0 of Neoverse N1. |
| 135 | * Inputs: |
| 136 | * x0: variant[4:7] and revision[0:3] of current cpu. |
| 137 | * Shall clobber: x0-x17 |
| 138 | * -------------------------------------------------- |
| 139 | */ |
| 140 | func errata_n1_1315703_wa |
| 141 | /* Compare x0 against revision r3p1 */ |
| 142 | mov x17, x30 |
| 143 | bl check_errata_1315703 |
| 144 | cbz x0, 1f |
| 145 | |
| 146 | mrs x0, NEOVERSE_N1_CPUACTLR2_EL1 |
| 147 | orr x0, x0, #NEOVERSE_N1_CPUACTLR2_EL1_BIT_16 |
| 148 | msr NEOVERSE_N1_CPUACTLR2_EL1, x0 |
| 149 | isb |
| 150 | |
| 151 | 1: |
| 152 | ret x17 |
| 153 | endfunc errata_n1_1315703_wa |
| 154 | |
| 155 | func check_errata_1315703 |
| 156 | /* Applies to everything <= r3p0. */ |
| 157 | mov x1, #0x30 |
| 158 | b cpu_rev_var_ls |
| 159 | endfunc check_errata_1315703 |
| 160 | |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 161 | func neoverse_n1_reset_func |
Dimitris Papastamos | 7ca21db | 2018-03-26 16:46:01 +0100 | [diff] [blame] | 162 | mov x19, x30 |
John Tsichritzis | 1f9ff49 | 2019-03-04 16:41:26 +0000 | [diff] [blame] | 163 | |
Sami Mujawar | a8722e9 | 2019-05-10 14:28:37 +0100 | [diff] [blame] | 164 | bl neoverse_n1_disable_speculative_loads |
John Tsichritzis | 1f9ff49 | 2019-03-04 16:41:26 +0000 | [diff] [blame] | 165 | |
Louis Mayencourt | b58142b | 2019-04-18 14:34:11 +0100 | [diff] [blame] | 166 | /* Forces all cacheable atomic instructions to be near */ |
| 167 | mrs x0, NEOVERSE_N1_CPUACTLR2_EL1 |
| 168 | orr x0, x0, #NEOVERSE_N1_CPUACTLR2_EL1_BIT_2 |
| 169 | msr NEOVERSE_N1_CPUACTLR2_EL1, x0 |
| 170 | isb |
| 171 | |
Dimitris Papastamos | 7ca21db | 2018-03-26 16:46:01 +0100 | [diff] [blame] | 172 | bl cpu_get_rev_var |
| 173 | mov x18, x0 |
| 174 | |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 175 | #if ERRATA_N1_1043202 |
Dimitris Papastamos | 7ca21db | 2018-03-26 16:46:01 +0100 | [diff] [blame] | 176 | mov x0, x18 |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 177 | bl errata_n1_1043202_wa |
Dimitris Papastamos | 7ca21db | 2018-03-26 16:46:01 +0100 | [diff] [blame] | 178 | #endif |
| 179 | |
lauwal01 | bd555f4 | 2019-06-24 11:23:50 -0500 | [diff] [blame] | 180 | #if ERRATA_N1_1073348 |
| 181 | mov x0, x18 |
| 182 | bl errata_n1_1073348_wa |
| 183 | #endif |
| 184 | |
lauwal01 | 363ee3c | 2019-06-24 11:28:34 -0500 | [diff] [blame^] | 185 | #if ERRATA_N1_1130799 |
| 186 | mov x0, x18 |
| 187 | bl errata_n1_1130799_wa |
| 188 | #endif |
| 189 | |
Andre Przywara | b934740 | 2019-05-20 14:57:06 +0100 | [diff] [blame] | 190 | #if ERRATA_N1_1315703 |
| 191 | mov x0, x18 |
| 192 | bl errata_n1_1315703_wa |
| 193 | #endif |
| 194 | |
Dimitris Papastamos | 89736dd | 2018-02-13 11:28:02 +0000 | [diff] [blame] | 195 | #if ENABLE_AMU |
| 196 | /* Make sure accesses from EL0/EL1 and EL2 are not trapped to EL3 */ |
| 197 | mrs x0, actlr_el3 |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 198 | orr x0, x0, #NEOVERSE_N1_ACTLR_AMEN_BIT |
Dimitris Papastamos | 89736dd | 2018-02-13 11:28:02 +0000 | [diff] [blame] | 199 | msr actlr_el3, x0 |
| 200 | isb |
| 201 | |
| 202 | /* Make sure accesses from EL0/EL1 are not trapped to EL2 */ |
| 203 | mrs x0, actlr_el2 |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 204 | orr x0, x0, #NEOVERSE_N1_ACTLR_AMEN_BIT |
Dimitris Papastamos | 89736dd | 2018-02-13 11:28:02 +0000 | [diff] [blame] | 205 | msr actlr_el2, x0 |
| 206 | isb |
| 207 | |
| 208 | /* Enable group0 counters */ |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 209 | mov x0, #NEOVERSE_N1_AMU_GROUP0_MASK |
Dimitris Papastamos | 89736dd | 2018-02-13 11:28:02 +0000 | [diff] [blame] | 210 | msr CPUAMCNTENSET_EL0, x0 |
| 211 | isb |
| 212 | #endif |
Louis Mayencourt | 8b8b13b | 2019-06-10 16:43:39 +0100 | [diff] [blame] | 213 | |
| 214 | #if ERRATA_DSU_936184 |
| 215 | bl errata_dsu_936184_wa |
| 216 | #endif |
| 217 | |
Dimitris Papastamos | 7ca21db | 2018-03-26 16:46:01 +0100 | [diff] [blame] | 218 | ret x19 |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 219 | endfunc neoverse_n1_reset_func |
Isla Mitchell | ea84d6b | 2017-08-03 16:04:46 +0100 | [diff] [blame] | 220 | |
| 221 | /* --------------------------------------------- |
| 222 | * HW will do the cache maintenance while powering down |
| 223 | * --------------------------------------------- |
| 224 | */ |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 225 | func neoverse_n1_core_pwr_dwn |
Isla Mitchell | ea84d6b | 2017-08-03 16:04:46 +0100 | [diff] [blame] | 226 | /* --------------------------------------------- |
| 227 | * Enable CPU power down bit in power control register |
| 228 | * --------------------------------------------- |
| 229 | */ |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 230 | mrs x0, NEOVERSE_N1_CPUPWRCTLR_EL1 |
| 231 | orr x0, x0, #NEOVERSE_N1_CORE_PWRDN_EN_MASK |
| 232 | msr NEOVERSE_N1_CPUPWRCTLR_EL1, x0 |
Isla Mitchell | ea84d6b | 2017-08-03 16:04:46 +0100 | [diff] [blame] | 233 | isb |
| 234 | ret |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 235 | endfunc neoverse_n1_core_pwr_dwn |
Isla Mitchell | ea84d6b | 2017-08-03 16:04:46 +0100 | [diff] [blame] | 236 | |
Dimitris Papastamos | 7ca21db | 2018-03-26 16:46:01 +0100 | [diff] [blame] | 237 | #if REPORT_ERRATA |
| 238 | /* |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 239 | * Errata printing function for Neoverse N1. Must follow AAPCS. |
Dimitris Papastamos | 7ca21db | 2018-03-26 16:46:01 +0100 | [diff] [blame] | 240 | */ |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 241 | func neoverse_n1_errata_report |
Dimitris Papastamos | 7ca21db | 2018-03-26 16:46:01 +0100 | [diff] [blame] | 242 | stp x8, x30, [sp, #-16]! |
| 243 | |
| 244 | bl cpu_get_rev_var |
| 245 | mov x8, x0 |
| 246 | |
| 247 | /* |
| 248 | * Report all errata. The revision-variant information is passed to |
| 249 | * checking functions of each errata. |
| 250 | */ |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 251 | report_errata ERRATA_N1_1043202, neoverse_n1, 1043202 |
lauwal01 | bd555f4 | 2019-06-24 11:23:50 -0500 | [diff] [blame] | 252 | report_errata ERRATA_N1_1073348, neoverse_n1, 1073348 |
lauwal01 | 363ee3c | 2019-06-24 11:28:34 -0500 | [diff] [blame^] | 253 | report_errata ERRATA_N1_1130799, neoverse_n1, 1130799 |
Andre Przywara | b934740 | 2019-05-20 14:57:06 +0100 | [diff] [blame] | 254 | report_errata ERRATA_N1_1315703, neoverse_n1, 1315703 |
Louis Mayencourt | 8b8b13b | 2019-06-10 16:43:39 +0100 | [diff] [blame] | 255 | report_errata ERRATA_DSU_936184, neoverse_n1, dsu_936184 |
Dimitris Papastamos | 7ca21db | 2018-03-26 16:46:01 +0100 | [diff] [blame] | 256 | |
| 257 | ldp x8, x30, [sp], #16 |
| 258 | ret |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 259 | endfunc neoverse_n1_errata_report |
Dimitris Papastamos | 7ca21db | 2018-03-26 16:46:01 +0100 | [diff] [blame] | 260 | #endif |
| 261 | |
Isla Mitchell | ea84d6b | 2017-08-03 16:04:46 +0100 | [diff] [blame] | 262 | /* --------------------------------------------- |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 263 | * This function provides neoverse_n1 specific |
Isla Mitchell | ea84d6b | 2017-08-03 16:04:46 +0100 | [diff] [blame] | 264 | * register information for crash reporting. |
| 265 | * It needs to return with x6 pointing to |
| 266 | * a list of register names in ascii and |
| 267 | * x8 - x15 having values of registers to be |
| 268 | * reported. |
| 269 | * --------------------------------------------- |
| 270 | */ |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 271 | .section .rodata.neoverse_n1_regs, "aS" |
| 272 | neoverse_n1_regs: /* The ascii list of register names to be reported */ |
Isla Mitchell | ea84d6b | 2017-08-03 16:04:46 +0100 | [diff] [blame] | 273 | .asciz "cpuectlr_el1", "" |
| 274 | |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 275 | func neoverse_n1_cpu_reg_dump |
| 276 | adr x6, neoverse_n1_regs |
| 277 | mrs x8, NEOVERSE_N1_CPUECTLR_EL1 |
Isla Mitchell | ea84d6b | 2017-08-03 16:04:46 +0100 | [diff] [blame] | 278 | ret |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 279 | endfunc neoverse_n1_cpu_reg_dump |
Isla Mitchell | ea84d6b | 2017-08-03 16:04:46 +0100 | [diff] [blame] | 280 | |
John Tsichritzis | 56369c1 | 2019-02-19 13:49:06 +0000 | [diff] [blame] | 281 | declare_cpu_ops neoverse_n1, NEOVERSE_N1_MIDR, \ |
| 282 | neoverse_n1_reset_func, \ |
| 283 | neoverse_n1_core_pwr_dwn |