| /* |
| * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| #include <arch.h> |
| #include <asm_macros.S> |
| #include <assert_macros.S> |
| #include <common/debug.h> |
| #include <cortex_a72.h> |
| #include <cpu_macros.S> |
| |
| /* --------------------------------------------- |
| * Disable all types of L2 prefetches. |
| * --------------------------------------------- |
| */ |
| func cortex_a72_disable_l2_prefetch |
| ldcopr16 r0, r1, CORTEX_A72_ECTLR |
| orr64_imm r0, r1, CORTEX_A72_ECTLR_DIS_TWD_ACC_PFTCH_BIT |
| bic64_imm r0, r1, (CORTEX_A72_ECTLR_L2_IPFTCH_DIST_MASK | \ |
| CORTEX_A72_ECTLR_L2_DPFTCH_DIST_MASK) |
| stcopr16 r0, r1, CORTEX_A72_ECTLR |
| isb |
| bx lr |
| endfunc cortex_a72_disable_l2_prefetch |
| |
| /* --------------------------------------------- |
| * Disable the load-store hardware prefetcher. |
| * --------------------------------------------- |
| */ |
| func cortex_a72_disable_hw_prefetcher |
| ldcopr16 r0, r1, CORTEX_A72_CPUACTLR |
| orr64_imm r0, r1, CORTEX_A72_CPUACTLR_DISABLE_L1_DCACHE_HW_PFTCH |
| stcopr16 r0, r1, CORTEX_A72_CPUACTLR |
| isb |
| dsb ish |
| bx lr |
| endfunc cortex_a72_disable_hw_prefetcher |
| |
| /* --------------------------------------------- |
| * Disable intra-cluster coherency |
| * Clobbers: r0-r1 |
| * --------------------------------------------- |
| */ |
| func cortex_a72_disable_smp |
| ldcopr16 r0, r1, CORTEX_A72_ECTLR |
| bic64_imm r0, r1, CORTEX_A72_ECTLR_SMP_BIT |
| stcopr16 r0, r1, CORTEX_A72_ECTLR |
| bx lr |
| endfunc cortex_a72_disable_smp |
| |
| /* --------------------------------------------- |
| * Disable debug interfaces |
| * --------------------------------------------- |
| */ |
| func cortex_a72_disable_ext_debug |
| mov r0, #1 |
| stcopr r0, DBGOSDLR |
| isb |
| dsb sy |
| bx lr |
| endfunc cortex_a72_disable_ext_debug |
| |
| /* --------------------------------------------------- |
| * Errata Workaround for Cortex A72 Errata #859971. |
| * This applies only to revision <= r0p3 of Cortex A72. |
| * Inputs: |
| * r0: variant[4:7] and revision[0:3] of current cpu. |
| * Shall clobber: r0-r3 |
| * --------------------------------------------------- |
| */ |
| func errata_a72_859971_wa |
| mov r2,lr |
| bl check_errata_859971 |
| mov lr, r2 |
| cmp r0, #ERRATA_NOT_APPLIES |
| beq 1f |
| ldcopr16 r0, r1, CORTEX_A72_CPUACTLR |
| orr64_imm r1, r1, CORTEX_A72_CPUACTLR_DIS_INSTR_PREFETCH |
| stcopr16 r0, r1, CORTEX_A72_CPUACTLR |
| 1: |
| bx lr |
| endfunc errata_a72_859971_wa |
| |
| func check_errata_859971 |
| mov r1, #0x03 |
| b cpu_rev_var_ls |
| endfunc check_errata_859971 |
| |
| func check_errata_cve_2017_5715 |
| mov r0, #ERRATA_MISSING |
| bx lr |
| endfunc check_errata_cve_2017_5715 |
| |
| func check_errata_cve_2018_3639 |
| #if WORKAROUND_CVE_2018_3639 |
| mov r0, #ERRATA_APPLIES |
| #else |
| mov r0, #ERRATA_MISSING |
| #endif |
| bx lr |
| endfunc check_errata_cve_2018_3639 |
| |
| /* ------------------------------------------------- |
| * The CPU Ops reset function for Cortex-A72. |
| * ------------------------------------------------- |
| */ |
| func cortex_a72_reset_func |
| mov r5, lr |
| bl cpu_get_rev_var |
| mov r4, r0 |
| |
| #if ERRATA_A72_859971 |
| mov r0, r4 |
| bl errata_a72_859971_wa |
| #endif |
| |
| #if WORKAROUND_CVE_2018_3639 |
| ldcopr16 r0, r1, CORTEX_A72_CPUACTLR |
| orr64_imm r0, r1, CORTEX_A72_CPUACTLR_DIS_LOAD_PASS_STORE |
| stcopr16 r0, r1, CORTEX_A72_CPUACTLR |
| isb |
| dsb sy |
| #endif |
| |
| /* --------------------------------------------- |
| * Enable the SMP bit. |
| * --------------------------------------------- |
| */ |
| ldcopr16 r0, r1, CORTEX_A72_ECTLR |
| orr64_imm r0, r1, CORTEX_A72_ECTLR_SMP_BIT |
| stcopr16 r0, r1, CORTEX_A72_ECTLR |
| isb |
| bx r5 |
| endfunc cortex_a72_reset_func |
| |
| /* ---------------------------------------------------- |
| * The CPU Ops core power down function for Cortex-A72. |
| * ---------------------------------------------------- |
| */ |
| func cortex_a72_core_pwr_dwn |
| push {r12, lr} |
| |
| /* Assert if cache is enabled */ |
| #if ENABLE_ASSERTIONS |
| ldcopr r0, SCTLR |
| tst r0, #SCTLR_C_BIT |
| ASM_ASSERT(eq) |
| #endif |
| |
| /* --------------------------------------------- |
| * Disable the L2 prefetches. |
| * --------------------------------------------- |
| */ |
| bl cortex_a72_disable_l2_prefetch |
| |
| /* --------------------------------------------- |
| * Disable the load-store hardware prefetcher. |
| * --------------------------------------------- |
| */ |
| bl cortex_a72_disable_hw_prefetcher |
| |
| /* --------------------------------------------- |
| * Flush L1 caches. |
| * --------------------------------------------- |
| */ |
| mov r0, #DC_OP_CISW |
| bl dcsw_op_level1 |
| |
| /* --------------------------------------------- |
| * Come out of intra cluster coherency |
| * --------------------------------------------- |
| */ |
| bl cortex_a72_disable_smp |
| |
| /* --------------------------------------------- |
| * Force the debug interfaces to be quiescent |
| * --------------------------------------------- |
| */ |
| pop {r12, lr} |
| b cortex_a72_disable_ext_debug |
| endfunc cortex_a72_core_pwr_dwn |
| |
| /* ------------------------------------------------------- |
| * The CPU Ops cluster power down function for Cortex-A72. |
| * ------------------------------------------------------- |
| */ |
| func cortex_a72_cluster_pwr_dwn |
| push {r12, lr} |
| |
| /* Assert if cache is enabled */ |
| #if ENABLE_ASSERTIONS |
| ldcopr r0, SCTLR |
| tst r0, #SCTLR_C_BIT |
| ASM_ASSERT(eq) |
| #endif |
| |
| /* --------------------------------------------- |
| * Disable the L2 prefetches. |
| * --------------------------------------------- |
| */ |
| bl cortex_a72_disable_l2_prefetch |
| |
| /* --------------------------------------------- |
| * Disable the load-store hardware prefetcher. |
| * --------------------------------------------- |
| */ |
| bl cortex_a72_disable_hw_prefetcher |
| |
| #if !SKIP_A72_L1_FLUSH_PWR_DWN |
| /* --------------------------------------------- |
| * Flush L1 caches. |
| * --------------------------------------------- |
| */ |
| mov r0, #DC_OP_CISW |
| bl dcsw_op_level1 |
| #endif |
| |
| /* --------------------------------------------- |
| * Disable the optional ACP. |
| * --------------------------------------------- |
| */ |
| bl plat_disable_acp |
| |
| /* ------------------------------------------------- |
| * Flush the L2 caches. |
| * ------------------------------------------------- |
| */ |
| mov r0, #DC_OP_CISW |
| bl dcsw_op_level2 |
| |
| /* --------------------------------------------- |
| * Come out of intra cluster coherency |
| * --------------------------------------------- |
| */ |
| bl cortex_a72_disable_smp |
| |
| /* --------------------------------------------- |
| * Force the debug interfaces to be quiescent |
| * --------------------------------------------- |
| */ |
| pop {r12, lr} |
| b cortex_a72_disable_ext_debug |
| endfunc cortex_a72_cluster_pwr_dwn |
| |
| #if REPORT_ERRATA |
| /* |
| * Errata printing function for Cortex A72. Must follow AAPCS. |
| */ |
| func cortex_a72_errata_report |
| push {r12, lr} |
| |
| bl cpu_get_rev_var |
| mov r4, r0 |
| |
| /* |
| * Report all errata. The revision-variant information is passed to |
| * checking functions of each errata. |
| */ |
| report_errata ERRATA_A72_859971, cortex_a72, 859971 |
| report_errata WORKAROUND_CVE_2017_5715, cortex_a72, cve_2017_5715 |
| report_errata WORKAROUND_CVE_2018_3639, cortex_a72, cve_2018_3639 |
| |
| pop {r12, lr} |
| bx lr |
| endfunc cortex_a72_errata_report |
| #endif |
| |
| declare_cpu_ops cortex_a72, CORTEX_A72_MIDR, \ |
| cortex_a72_reset_func, \ |
| cortex_a72_core_pwr_dwn, \ |
| cortex_a72_cluster_pwr_dwn |
