/* * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ #include #include #include #include #include #include /* --------------------------------------------- * 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 /* ------------------------------------------------- * 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 /* --------------------------------------------- * 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 lr 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 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