| /* |
| * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include <arch.h> |
| #include <asm_macros.S> |
| #include <cortex_a75.h> |
| #include <cpuamu.h> |
| #include <cpu_macros.S> |
| |
| /* Hardware handled coherency */ |
| #if HW_ASSISTED_COHERENCY == 0 |
| #error "Cortex-A75 must be compiled with HW_ASSISTED_COHERENCY enabled" |
| #endif |
| |
| /* -------------------------------------------------- |
| * Errata Workaround for Cortex A75 Errata #764081. |
| * This applies only to revision r0p0 of Cortex A75. |
| * Inputs: |
| * x0: variant[4:7] and revision[0:3] of current cpu. |
| * Shall clobber: x0-x17 |
| * -------------------------------------------------- |
| */ |
| func errata_a75_764081_wa |
| /* |
| * Compare x0 against revision r0p0 |
| */ |
| mov x17, x30 |
| bl check_errata_764081 |
| cbz x0, 1f |
| mrs x1, sctlr_el3 |
| orr x1, x1 ,#SCTLR_IESB_BIT |
| msr sctlr_el3, x1 |
| isb |
| 1: |
| ret x17 |
| endfunc errata_a75_764081_wa |
| |
| func check_errata_764081 |
| mov x1, #0x00 |
| b cpu_rev_var_ls |
| endfunc check_errata_764081 |
| |
| /* -------------------------------------------------- |
| * Errata Workaround for Cortex A75 Errata #790748. |
| * This applies only to revision r0p0 of Cortex A75. |
| * Inputs: |
| * x0: variant[4:7] and revision[0:3] of current cpu. |
| * Shall clobber: x0-x17 |
| * -------------------------------------------------- |
| */ |
| func errata_a75_790748_wa |
| /* |
| * Compare x0 against revision r0p0 |
| */ |
| mov x17, x30 |
| bl check_errata_790748 |
| cbz x0, 1f |
| mrs x1, CORTEX_A75_CPUACTLR_EL1 |
| orr x1, x1 ,#(1 << 13) |
| msr CORTEX_A75_CPUACTLR_EL1, x1 |
| isb |
| 1: |
| ret x17 |
| endfunc errata_a75_790748_wa |
| |
| func check_errata_790748 |
| mov x1, #0x00 |
| b cpu_rev_var_ls |
| endfunc check_errata_790748 |
| |
| /* ------------------------------------------------- |
| * The CPU Ops reset function for Cortex-A75. |
| * ------------------------------------------------- |
| */ |
| func cortex_a75_reset_func |
| mov x19, x30 |
| bl cpu_get_rev_var |
| mov x18, x0 |
| |
| #if ERRATA_A75_764081 |
| mov x0, x18 |
| bl errata_a75_764081_wa |
| #endif |
| |
| #if ERRATA_A75_790748 |
| mov x0, x18 |
| bl errata_a75_790748_wa |
| #endif |
| |
| #if IMAGE_BL31 && WORKAROUND_CVE_2017_5715 |
| cpu_check_csv2 x0, 1f |
| adr x0, wa_cve_2017_5715_bpiall_vbar |
| msr vbar_el3, x0 |
| isb |
| 1: |
| #endif |
| |
| #if WORKAROUND_CVE_2018_3639 |
| mrs x0, CORTEX_A75_CPUACTLR_EL1 |
| orr x0, x0, #CORTEX_A75_CPUACTLR_EL1_DISABLE_LOAD_PASS_STORE |
| msr CORTEX_A75_CPUACTLR_EL1, x0 |
| isb |
| #endif |
| |
| #if ERRATA_DSU_798953 |
| bl errata_dsu_798953_wa |
| #endif |
| |
| #if ERRATA_DSU_936184 |
| bl errata_dsu_936184_wa |
| #endif |
| |
| #if ENABLE_AMU |
| /* Make sure accesses from EL0/EL1 and EL2 are not trapped to EL3 */ |
| mrs x0, actlr_el3 |
| orr x0, x0, #CORTEX_A75_ACTLR_AMEN_BIT |
| msr actlr_el3, x0 |
| isb |
| |
| /* Make sure accesses from EL0/EL1 are not trapped to EL2 */ |
| mrs x0, actlr_el2 |
| orr x0, x0, #CORTEX_A75_ACTLR_AMEN_BIT |
| msr actlr_el2, x0 |
| isb |
| |
| /* Enable group0 counters */ |
| mov x0, #CORTEX_A75_AMU_GROUP0_MASK |
| msr CPUAMCNTENSET_EL0, x0 |
| isb |
| |
| /* Enable group1 counters */ |
| mov x0, #CORTEX_A75_AMU_GROUP1_MASK |
| msr CPUAMCNTENSET_EL0, x0 |
| isb |
| #endif |
| ret x19 |
| endfunc cortex_a75_reset_func |
| |
| func check_errata_cve_2017_5715 |
| cpu_check_csv2 x0, 1f |
| #if WORKAROUND_CVE_2017_5715 |
| mov x0, #ERRATA_APPLIES |
| #else |
| mov x0, #ERRATA_MISSING |
| #endif |
| ret |
| 1: |
| mov x0, #ERRATA_NOT_APPLIES |
| ret |
| endfunc check_errata_cve_2017_5715 |
| |
| func check_errata_cve_2018_3639 |
| #if WORKAROUND_CVE_2018_3639 |
| mov x0, #ERRATA_APPLIES |
| #else |
| mov x0, #ERRATA_MISSING |
| #endif |
| ret |
| endfunc check_errata_cve_2018_3639 |
| |
| /* --------------------------------------------- |
| * HW will do the cache maintenance while powering down |
| * --------------------------------------------- |
| */ |
| func cortex_a75_core_pwr_dwn |
| /* --------------------------------------------- |
| * Enable CPU power down bit in power control register |
| * --------------------------------------------- |
| */ |
| mrs x0, CORTEX_A75_CPUPWRCTLR_EL1 |
| orr x0, x0, #CORTEX_A75_CORE_PWRDN_EN_MASK |
| msr CORTEX_A75_CPUPWRCTLR_EL1, x0 |
| isb |
| ret |
| endfunc cortex_a75_core_pwr_dwn |
| |
| #if REPORT_ERRATA |
| /* |
| * Errata printing function for Cortex A75. Must follow AAPCS. |
| */ |
| func cortex_a75_errata_report |
| stp x8, x30, [sp, #-16]! |
| |
| bl cpu_get_rev_var |
| mov x8, x0 |
| |
| /* |
| * Report all errata. The revision-variant information is passed to |
| * checking functions of each errata. |
| */ |
| report_errata ERRATA_A75_764081, cortex_a75, 764081 |
| report_errata ERRATA_A75_790748, cortex_a75, 790748 |
| report_errata WORKAROUND_CVE_2017_5715, cortex_a75, cve_2017_5715 |
| report_errata WORKAROUND_CVE_2018_3639, cortex_a75, cve_2018_3639 |
| report_errata ERRATA_DSU_798953, cortex_a75, dsu_798953 |
| report_errata ERRATA_DSU_936184, cortex_a75, dsu_936184 |
| |
| ldp x8, x30, [sp], #16 |
| ret |
| endfunc cortex_a75_errata_report |
| #endif |
| |
| /* --------------------------------------------- |
| * This function provides cortex_a75 specific |
| * register information for crash reporting. |
| * It needs to return with x6 pointing to |
| * a list of register names in ascii and |
| * x8 - x15 having values of registers to be |
| * reported. |
| * --------------------------------------------- |
| */ |
| .section .rodata.cortex_a75_regs, "aS" |
| cortex_a75_regs: /* The ascii list of register names to be reported */ |
| .asciz "cpuectlr_el1", "" |
| |
| func cortex_a75_cpu_reg_dump |
| adr x6, cortex_a75_regs |
| mrs x8, CORTEX_A75_CPUECTLR_EL1 |
| ret |
| endfunc cortex_a75_cpu_reg_dump |
| |
| declare_cpu_ops_wa cortex_a75, CORTEX_A75_MIDR, \ |
| cortex_a75_reset_func, \ |
| check_errata_cve_2017_5715, \ |
| CPU_NO_EXTRA2_FUNC, \ |
| cortex_a75_core_pwr_dwn |
