/* * Copyright (c) 2014-2017, ARM Limited and Contributors. All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ #include #include #include #include #include #include #include #if A53_DISABLE_NON_TEMPORAL_HINT #undef ERRATA_A53_836870 #define ERRATA_A53_836870 1 #endif /* --------------------------------------------- * Disable L1 data cache and unified L2 cache * --------------------------------------------- */ func cortex_a53_disable_dcache mrs x1, sctlr_el3 bic x1, x1, #SCTLR_C_BIT msr sctlr_el3, x1 isb ret endfunc cortex_a53_disable_dcache /* --------------------------------------------- * Disable intra-cluster coherency * --------------------------------------------- */ func cortex_a53_disable_smp mrs x0, CORTEX_A53_ECTLR_EL1 bic x0, x0, #CORTEX_A53_ECTLR_SMP_BIT msr CORTEX_A53_ECTLR_EL1, x0 isb dsb sy ret endfunc cortex_a53_disable_smp /* -------------------------------------------------- * Errata Workaround for Cortex A53 Errata #826319. * This applies only to revision <= r0p2 of Cortex A53. * Inputs: * x0: variant[4:7] and revision[0:3] of current cpu. * Shall clobber: x0-x17 * -------------------------------------------------- */ func errata_a53_826319_wa /* * Compare x0 against revision r0p2 */ mov x17, x30 bl check_errata_826319 cbz x0, 1f mrs x1, CORTEX_A53_L2ACTLR_EL1 bic x1, x1, #CORTEX_A53_L2ACTLR_ENABLE_UNIQUECLEAN orr x1, x1, #CORTEX_A53_L2ACTLR_DISABLE_CLEAN_PUSH msr CORTEX_A53_L2ACTLR_EL1, x1 1: ret x17 endfunc errata_a53_826319_wa func check_errata_826319 mov x1, #0x02 b cpu_rev_var_ls endfunc check_errata_826319 /* --------------------------------------------------------------------- * Disable the cache non-temporal hint. * * This ignores the Transient allocation hint in the MAIR and treats * allocations the same as non-transient allocation types. As a result, * the LDNP and STNP instructions in AArch64 behave the same as the * equivalent LDP and STP instructions. * * This is relevant only for revisions <= r0p3 of Cortex-A53. * From r0p4 and onwards, the bit to disable the hint is enabled by * default at reset. * * Inputs: * x0: variant[4:7] and revision[0:3] of current cpu. * Shall clobber: x0-x17 * --------------------------------------------------------------------- */ func a53_disable_non_temporal_hint /* * Compare x0 against revision r0p3 */ mov x17, x30 bl check_errata_disable_non_temporal_hint cbz x0, 1f mrs x1, CORTEX_A53_ACTLR_EL1 orr x1, x1, #CORTEX_A53_ACTLR_DTAH msr CORTEX_A53_ACTLR_EL1, x1 1: ret x17 endfunc a53_disable_non_temporal_hint func check_errata_disable_non_temporal_hint mov x1, #0x03 b cpu_rev_var_ls endfunc check_errata_disable_non_temporal_hint /* -------------------------------------------------- * Errata Workaround for Cortex A53 Errata #855873. * * This applies only to revisions >= r0p3 of Cortex A53. * Earlier revisions of the core are affected as well, but don't * have the chicken bit in the CPUACTLR register. It is expected that * the rich OS takes care of that, especially as the workaround is * shared with other erratas in those revisions of the CPU. * Inputs: * x0: variant[4:7] and revision[0:3] of current cpu. * Shall clobber: x0-x17 * -------------------------------------------------- */ func errata_a53_855873_wa /* * Compare x0 against revision r0p3 and higher */ mov x17, x30 bl check_errata_855873 cbz x0, 1f mrs x1, CORTEX_A53_ACTLR_EL1 orr x1, x1, #CORTEX_A53_ACTLR_ENDCCASCI msr CORTEX_A53_ACTLR_EL1, x1 1: ret x17 endfunc errata_a53_855873_wa func check_errata_855873 mov x1, #0x03 b cpu_rev_var_hs endfunc check_errata_855873 /* ------------------------------------------------- * The CPU Ops reset function for Cortex-A53. * Shall clobber: x0-x19 * ------------------------------------------------- */ func cortex_a53_reset_func mov x19, x30 bl cpu_get_rev_var mov x18, x0 #if ERRATA_A53_826319 mov x0, x18 bl errata_a53_826319_wa #endif #if ERRATA_A53_836870 mov x0, x18 bl a53_disable_non_temporal_hint #endif #if ERRATA_A53_855873 mov x0, x18 bl errata_a53_855873_wa #endif /* --------------------------------------------- * Enable the SMP bit. * --------------------------------------------- */ mrs x0, CORTEX_A53_ECTLR_EL1 orr x0, x0, #CORTEX_A53_ECTLR_SMP_BIT msr CORTEX_A53_ECTLR_EL1, x0 isb ret x19 endfunc cortex_a53_reset_func func cortex_a53_core_pwr_dwn mov x18, x30 /* --------------------------------------------- * Turn off caches. * --------------------------------------------- */ bl cortex_a53_disable_dcache /* --------------------------------------------- * Flush L1 caches. * --------------------------------------------- */ mov x0, #DCCISW bl dcsw_op_level1 /* --------------------------------------------- * Come out of intra cluster coherency * --------------------------------------------- */ mov x30, x18 b cortex_a53_disable_smp endfunc cortex_a53_core_pwr_dwn func cortex_a53_cluster_pwr_dwn mov x18, x30 /* --------------------------------------------- * Turn off caches. * --------------------------------------------- */ bl cortex_a53_disable_dcache /* --------------------------------------------- * Flush L1 caches. * --------------------------------------------- */ mov x0, #DCCISW bl dcsw_op_level1 /* --------------------------------------------- * Disable the optional ACP. * --------------------------------------------- */ bl plat_disable_acp /* --------------------------------------------- * Flush L2 caches. * --------------------------------------------- */ mov x0, #DCCISW bl dcsw_op_level2 /* --------------------------------------------- * Come out of intra cluster coherency * --------------------------------------------- */ mov x30, x18 b cortex_a53_disable_smp endfunc cortex_a53_cluster_pwr_dwn #if REPORT_ERRATA /* * Errata printing function for Cortex A53. Must follow AAPCS. */ func cortex_a53_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_A53_826319, cortex_a53, 826319 report_errata ERRATA_A53_836870, cortex_a53, disable_non_temporal_hint report_errata ERRATA_A53_855873, cortex_a53, 855873 ldp x8, x30, [sp], #16 ret endfunc cortex_a53_errata_report #endif /* --------------------------------------------- * This function provides cortex_a53 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_a53_regs, "aS" cortex_a53_regs: /* The ascii list of register names to be reported */ .asciz "cpuectlr_el1", "cpumerrsr_el1", "l2merrsr_el1", \ "cpuactlr_el1", "" func cortex_a53_cpu_reg_dump adr x6, cortex_a53_regs mrs x8, CORTEX_A53_ECTLR_EL1 mrs x9, CORTEX_A53_MERRSR_EL1 mrs x10, CORTEX_A53_L2MERRSR_EL1 mrs x11, CORTEX_A53_ACTLR_EL1 ret endfunc cortex_a53_cpu_reg_dump declare_cpu_ops cortex_a53, CORTEX_A53_MIDR, \ cortex_a53_reset_func, \ cortex_a53_core_pwr_dwn, \ cortex_a53_cluster_pwr_dwn