/* * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ #include #include #include #include #include #include /* --------------------------------------------- * Disable L1 data cache and unified L2 cache * --------------------------------------------- */ func cortex_a72_disable_dcache mrs x1, sctlr_el3 bic x1, x1, #SCTLR_C_BIT msr sctlr_el3, x1 isb ret endfunc cortex_a72_disable_dcache /* --------------------------------------------- * Disable all types of L2 prefetches. * --------------------------------------------- */ func cortex_a72_disable_l2_prefetch mrs x0, CORTEX_A72_ECTLR_EL1 orr x0, x0, #CORTEX_A72_ECTLR_DIS_TWD_ACC_PFTCH_BIT mov x1, #CORTEX_A72_ECTLR_L2_IPFTCH_DIST_MASK orr x1, x1, #CORTEX_A72_ECTLR_L2_DPFTCH_DIST_MASK bic x0, x0, x1 msr CORTEX_A72_ECTLR_EL1, x0 isb ret endfunc cortex_a72_disable_l2_prefetch /* --------------------------------------------- * Disable the load-store hardware prefetcher. * --------------------------------------------- */ func cortex_a72_disable_hw_prefetcher mrs x0, CORTEX_A72_CPUACTLR_EL1 orr x0, x0, #CORTEX_A72_CPUACTLR_EL1_DISABLE_L1_DCACHE_HW_PFTCH msr CORTEX_A72_CPUACTLR_EL1, x0 isb dsb ish ret endfunc cortex_a72_disable_hw_prefetcher /* --------------------------------------------- * Disable intra-cluster coherency * --------------------------------------------- */ func cortex_a72_disable_smp mrs x0, CORTEX_A72_ECTLR_EL1 bic x0, x0, #CORTEX_A72_ECTLR_SMP_BIT msr CORTEX_A72_ECTLR_EL1, x0 ret endfunc cortex_a72_disable_smp /* --------------------------------------------- * Disable debug interfaces * --------------------------------------------- */ func cortex_a72_disable_ext_debug mov x0, #1 msr osdlr_el1, x0 isb dsb sy ret endfunc cortex_a72_disable_ext_debug /* -------------------------------------------------- * Errata Workaround for Cortex A72 Errata #859971. * This applies only to revision <= r0p3 of Cortex A72. * Inputs: * x0: variant[4:7] and revision[0:3] of current cpu. * Shall clobber: * -------------------------------------------------- */ func errata_a72_859971_wa mov x17,x30 bl check_errata_859971 cbz x0, 1f mrs x1, CORTEX_A72_CPUACTLR_EL1 orr x1, x1, #CORTEX_A72_CPUACTLR_EL1_DIS_INSTR_PREFETCH msr CORTEX_A72_CPUACTLR_EL1, x1 1: ret x17 endfunc errata_a72_859971_wa func check_errata_859971 mov x1, #0x03 b cpu_rev_var_ls endfunc check_errata_859971 /* ------------------------------------------------- * The CPU Ops reset function for Cortex-A72. * ------------------------------------------------- */ func cortex_a72_reset_func mov x19, x30 bl cpu_get_rev_var mov x18, x0 #if ERRATA_A72_859971 mov x0, x18 bl errata_a72_859971_wa #endif /* --------------------------------------------- * Enable the SMP bit. * --------------------------------------------- */ mrs x0, CORTEX_A72_ECTLR_EL1 orr x0, x0, #CORTEX_A72_ECTLR_SMP_BIT msr CORTEX_A72_ECTLR_EL1, x0 isb ret x19 endfunc cortex_a72_reset_func /* ---------------------------------------------------- * The CPU Ops core power down function for Cortex-A72. * ---------------------------------------------------- */ func cortex_a72_core_pwr_dwn mov x18, x30 /* --------------------------------------------- * Turn off caches. * --------------------------------------------- */ bl cortex_a72_disable_dcache /* --------------------------------------------- * 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 x0, #DCCISW bl dcsw_op_level1 /* --------------------------------------------- * Come out of intra cluster coherency * --------------------------------------------- */ bl cortex_a72_disable_smp /* --------------------------------------------- * Force the debug interfaces to be quiescent * --------------------------------------------- */ mov x30, x18 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 mov x18, x30 /* --------------------------------------------- * Turn off caches. * --------------------------------------------- */ bl cortex_a72_disable_dcache /* --------------------------------------------- * 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 x0, #DCCISW bl dcsw_op_level1 #endif /* --------------------------------------------- * Disable the optional ACP. * --------------------------------------------- */ bl plat_disable_acp /* ------------------------------------------------- * Flush the L2 caches. * ------------------------------------------------- */ mov x0, #DCCISW bl dcsw_op_level2 /* --------------------------------------------- * Come out of intra cluster coherency * --------------------------------------------- */ bl cortex_a72_disable_smp /* --------------------------------------------- * Force the debug interfaces to be quiescent * --------------------------------------------- */ mov x30, x18 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 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_A72_859971, cortex_a72, 859971 ldp x8, x30, [sp], #16 ret endfunc cortex_a72_errata_report #endif /* --------------------------------------------- * This function provides cortex_a72 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_a72_regs, "aS" cortex_a72_regs: /* The ascii list of register names to be reported */ .asciz "cpuectlr_el1", "cpumerrsr_el1", "l2merrsr_el1", "" func cortex_a72_cpu_reg_dump adr x6, cortex_a72_regs mrs x8, CORTEX_A72_ECTLR_EL1 mrs x9, CORTEX_A72_MERRSR_EL1 mrs x10, CORTEX_A72_L2MERRSR_EL1 ret endfunc cortex_a72_cpu_reg_dump declare_cpu_ops cortex_a72, CORTEX_A72_MIDR, \ cortex_a72_reset_func, \ cortex_a72_core_pwr_dwn, \ cortex_a72_cluster_pwr_dwn