1/* 2 * Copyright (c) 2014-2016, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30#include <arch.h> 31#include <asm_macros.S> 32#include <assert_macros.S> 33#include <bl_common.h> 34#include <cortex_a57.h> 35#include <cpu_macros.S> 36#include <debug.h> 37#include <plat_macros.S> 38 39 /* --------------------------------------------- 40 * Disable L1 data cache and unified L2 cache 41 * --------------------------------------------- 42 */ 43func cortex_a57_disable_dcache 44 mrs x1, sctlr_el3 45 bic x1, x1, #SCTLR_C_BIT 46 msr sctlr_el3, x1 47 isb 48 ret 49endfunc cortex_a57_disable_dcache 50 51 /* --------------------------------------------- 52 * Disable all types of L2 prefetches. 53 * --------------------------------------------- 54 */ 55func cortex_a57_disable_l2_prefetch 56 mrs x0, CPUECTLR_EL1 57 orr x0, x0, #CPUECTLR_DIS_TWD_ACC_PFTCH_BIT 58 mov x1, #CPUECTLR_L2_IPFTCH_DIST_MASK 59 orr x1, x1, #CPUECTLR_L2_DPFTCH_DIST_MASK 60 bic x0, x0, x1 61 msr CPUECTLR_EL1, x0 62 isb 63 dsb ish 64 ret 65endfunc cortex_a57_disable_l2_prefetch 66 67 /* --------------------------------------------- 68 * Disable intra-cluster coherency 69 * --------------------------------------------- 70 */ 71func cortex_a57_disable_smp 72 mrs x0, CPUECTLR_EL1 73 bic x0, x0, #CPUECTLR_SMP_BIT 74 msr CPUECTLR_EL1, x0 75 ret 76endfunc cortex_a57_disable_smp 77 78 /* --------------------------------------------- 79 * Disable debug interfaces 80 * --------------------------------------------- 81 */ 82func cortex_a57_disable_ext_debug 83 mov x0, #1 84 msr osdlr_el1, x0 85 isb 86 dsb sy 87 ret 88endfunc cortex_a57_disable_ext_debug 89 90 /* -------------------------------------------------- 91 * Errata Workaround for Cortex A57 Errata #806969. 92 * This applies only to revision r0p0 of Cortex A57. 93 * Inputs: 94 * x0: variant[4:7] and revision[0:3] of current cpu. 95 * Clobbers : x0 - x5 96 * -------------------------------------------------- 97 */ 98func errata_a57_806969_wa 99 /* 100 * Compare x0 against revision r0p0 101 */ 102 cbz x0, apply_806969 103#if LOG_LEVEL >= LOG_LEVEL_VERBOSE 104 b print_revision_warning 105#else 106 ret 107#endif 108apply_806969: 109 mrs x1, CPUACTLR_EL1 110 orr x1, x1, #CPUACTLR_NO_ALLOC_WBWA 111 msr CPUACTLR_EL1, x1 112 ret 113endfunc errata_a57_806969_wa 114 115 116 /* --------------------------------------------------- 117 * Errata Workaround for Cortex A57 Errata #813420. 118 * This applies only to revision r0p0 of Cortex A57. 119 * Inputs: 120 * x0: variant[4:7] and revision[0:3] of current cpu. 121 * Clobbers : x0 - x5 122 * --------------------------------------------------- 123 */ 124func errata_a57_813420_wa 125 /* 126 * Compare x0 against revision r0p0 127 */ 128 cbz x0, apply_813420 129#if LOG_LEVEL >= LOG_LEVEL_VERBOSE 130 b print_revision_warning 131#else 132 ret 133#endif 134apply_813420: 135 mrs x1, CPUACTLR_EL1 136 orr x1, x1, #CPUACTLR_DCC_AS_DCCI 137 msr CPUACTLR_EL1, x1 138 ret 139endfunc errata_a57_813420_wa 140 141 /* -------------------------------------------------------------------- 142 * Disable the over-read from the LDNP instruction. 143 * 144 * This applies to all revisions <= r1p2. The performance degradation 145 * observed with LDNP/STNP has been fixed on r1p3 and onwards. 146 * 147 * Inputs: 148 * x0: variant[4:7] and revision[0:3] of current cpu. 149 * Clobbers : x0 - x5, x30 150 * --------------------------------------------------------------------- 151 */ 152func a57_disable_ldnp_overread 153 /* 154 * Compare x0 against revision r1p2 155 */ 156 cmp x0, #0x12 157 b.ls disable_hint 158#if LOG_LEVEL >= LOG_LEVEL_VERBOSE 159 b print_revision_warning 160#else 161 ret 162#endif 163disable_hint: 164 mrs x1, CPUACTLR_EL1 165 orr x1, x1, #CPUACTLR_DIS_OVERREAD 166 msr CPUACTLR_EL1, x1 167 ret 168endfunc a57_disable_ldnp_overread 169 170 /* --------------------------------------------------- 171 * Errata Workaround for Cortex A57 Errata #826974. 172 * This applies only to revision <= r1p1 of Cortex A57. 173 * Inputs: 174 * x0: variant[4:7] and revision[0:3] of current cpu. 175 * Clobbers : x0 - x5 176 * --------------------------------------------------- 177 */ 178func errata_a57_826974_wa 179 /* 180 * Compare x0 against revision r1p1 181 */ 182 cmp x0, #0x11 183 b.ls apply_826974 184#if LOG_LEVEL >= LOG_LEVEL_VERBOSE 185 b print_revision_warning 186#else 187 ret 188#endif 189apply_826974: 190 mrs x1, CPUACTLR_EL1 191 orr x1, x1, #CPUACTLR_DIS_LOAD_PASS_DMB 192 msr CPUACTLR_EL1, x1 193 ret 194endfunc errata_a57_826974_wa 195 196 197 /* ------------------------------------------------- 198 * The CPU Ops reset function for Cortex-A57. 199 * Clobbers: x0-x5, x15, x19, x30 200 * ------------------------------------------------- 201 */ 202func cortex_a57_reset_func 203 mov x19, x30 204 mrs x0, midr_el1 205 206 /* 207 * Extract the variant[20:23] and revision[0:3] from x0 208 * and pack it in x15[0:7] as variant[4:7] and revision[0:3]. 209 * First extract x0[16:23] to x15[0:7] and zero fill the rest. 210 * Then extract x0[0:3] into x15[0:3] retaining other bits. 211 */ 212 ubfx x15, x0, #(MIDR_VAR_SHIFT - MIDR_REV_BITS), #(MIDR_REV_BITS + MIDR_VAR_BITS) 213 bfxil x15, x0, #MIDR_REV_SHIFT, #MIDR_REV_BITS 214 215#if ERRATA_A57_806969 216 mov x0, x15 217 bl errata_a57_806969_wa 218#endif 219 220#if ERRATA_A57_813420 221 mov x0, x15 222 bl errata_a57_813420_wa 223#endif 224 225#if A57_DISABLE_NON_TEMPORAL_HINT 226 mov x0, x15 227 bl a57_disable_ldnp_overread 228#endif 229 230#if ERRATA_A57_826974 231 mov x0, x15 232 bl errata_a57_826974_wa 233#endif 234 235 /* --------------------------------------------- 236 * Enable the SMP bit. 237 * --------------------------------------------- 238 */ 239 mrs x0, CPUECTLR_EL1 240 orr x0, x0, #CPUECTLR_SMP_BIT 241 msr CPUECTLR_EL1, x0 242 isb 243 ret x19 244endfunc cortex_a57_reset_func 245 246 /* ---------------------------------------------------- 247 * The CPU Ops core power down function for Cortex-A57. 248 * ---------------------------------------------------- 249 */ 250func cortex_a57_core_pwr_dwn 251 mov x18, x30 252 253 /* --------------------------------------------- 254 * Turn off caches. 255 * --------------------------------------------- 256 */ 257 bl cortex_a57_disable_dcache 258 259 /* --------------------------------------------- 260 * Disable the L2 prefetches. 261 * --------------------------------------------- 262 */ 263 bl cortex_a57_disable_l2_prefetch 264 265 /* --------------------------------------------- 266 * Flush L1 caches. 267 * --------------------------------------------- 268 */ 269 mov x0, #DCCISW 270 bl dcsw_op_level1 271 272 /* --------------------------------------------- 273 * Come out of intra cluster coherency 274 * --------------------------------------------- 275 */ 276 bl cortex_a57_disable_smp 277 278 /* --------------------------------------------- 279 * Force the debug interfaces to be quiescent 280 * --------------------------------------------- 281 */ 282 mov x30, x18 283 b cortex_a57_disable_ext_debug 284endfunc cortex_a57_core_pwr_dwn 285 286 /* ------------------------------------------------------- 287 * The CPU Ops cluster power down function for Cortex-A57. 288 * ------------------------------------------------------- 289 */ 290func cortex_a57_cluster_pwr_dwn 291 mov x18, x30 292 293 /* --------------------------------------------- 294 * Turn off caches. 295 * --------------------------------------------- 296 */ 297 bl cortex_a57_disable_dcache 298 299 /* --------------------------------------------- 300 * Disable the L2 prefetches. 301 * --------------------------------------------- 302 */ 303 bl cortex_a57_disable_l2_prefetch 304 305#if !SKIP_A57_L1_FLUSH_PWR_DWN 306 /* ------------------------------------------------- 307 * Flush the L1 caches. 308 * ------------------------------------------------- 309 */ 310 mov x0, #DCCISW 311 bl dcsw_op_level1 312#endif 313 /* --------------------------------------------- 314 * Disable the optional ACP. 315 * --------------------------------------------- 316 */ 317 bl plat_disable_acp 318 319 /* ------------------------------------------------- 320 * Flush the L2 caches. 321 * ------------------------------------------------- 322 */ 323 mov x0, #DCCISW 324 bl dcsw_op_level2 325 326 /* --------------------------------------------- 327 * Come out of intra cluster coherency 328 * --------------------------------------------- 329 */ 330 bl cortex_a57_disable_smp 331 332 /* --------------------------------------------- 333 * Force the debug interfaces to be quiescent 334 * --------------------------------------------- 335 */ 336 mov x30, x18 337 b cortex_a57_disable_ext_debug 338endfunc cortex_a57_cluster_pwr_dwn 339 340 /* --------------------------------------------- 341 * This function provides cortex_a57 specific 342 * register information for crash reporting. 343 * It needs to return with x6 pointing to 344 * a list of register names in ascii and 345 * x8 - x15 having values of registers to be 346 * reported. 347 * --------------------------------------------- 348 */ 349.section .rodata.cortex_a57_regs, "aS" 350cortex_a57_regs: /* The ascii list of register names to be reported */ 351 .asciz "cpuectlr_el1", "" 352 353func cortex_a57_cpu_reg_dump 354 adr x6, cortex_a57_regs 355 mrs x8, CPUECTLR_EL1 356 ret 357endfunc cortex_a57_cpu_reg_dump 358 359 360declare_cpu_ops cortex_a57, CORTEX_A57_MIDR 361