/* * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ #include #include #include #include #include #include #if A53_DISABLE_NON_TEMPORAL_HINT #undef ERRATA_A53_836870 #define ERRATA_A53_836870 1 #endif /* --------------------------------------------- * Disable intra-cluster coherency * --------------------------------------------- */ func cortex_a53_disable_smp ldcopr16 r0, r1, CORTEX_A53_ECTLR bic64_imm r0, r1, CORTEX_A53_ECTLR_SMP_BIT stcopr16 r0, r1, CORTEX_A53_ECTLR isb dsb sy bx lr endfunc cortex_a53_disable_smp /* -------------------------------------------------- * Errata Workaround for Cortex A53 Errata #826319. * This applies only to revision <= r0p2 of Cortex A53. * Inputs: * r0: variant[4:7] and revision[0:3] of current cpu. * Shall clobber: r0-r3 * -------------------------------------------------- */ func errata_a53_826319_wa /* * Compare r0 against revision r0p2 */ mov r2, lr bl check_errata_826319 mov lr, r2 cmp r0, #ERRATA_NOT_APPLIES beq 1f ldcopr r0, CORTEX_A53_L2ACTLR bic r0, #CORTEX_A53_L2ACTLR_ENABLE_UNIQUECLEAN orr r0, #CORTEX_A53_L2ACTLR_DISABLE_CLEAN_PUSH stcopr r0, CORTEX_A53_L2ACTLR 1: bx lr endfunc errata_a53_826319_wa func check_errata_826319 mov r1, #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: * r0: variant[4:7] and revision[0:3] of current cpu. * Shall clobber: r0-r3 * --------------------------------------------------------------------- */ func a53_disable_non_temporal_hint /* * Compare r0 against revision r0p3 */ mov r2, lr bl check_errata_disable_non_temporal_hint mov lr, r2 cmp r0, #ERRATA_NOT_APPLIES beq 1f ldcopr16 r0, r1, CORTEX_A53_ACTLR orr64_imm r0, r1, CORTEX_A53_ACTLR_DTAH stcopr16 r0, r1, CORTEX_A53_ACTLR 1: bx lr endfunc a53_disable_non_temporal_hint func check_errata_disable_non_temporal_hint mov r1, #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: * r0: variant[4:7] and revision[0:3] of current cpu. * Shall clobber: r0-r3 * -------------------------------------------------- */ func errata_a53_855873_wa /* * Compare r0 against revision r0p3 and higher */ mov r2, lr bl check_errata_855873 mov lr, r2 cmp r0, #ERRATA_NOT_APPLIES beq 1f ldcopr16 r0, r1, CORTEX_A53_ACTLR orr64_imm r0, r1, CORTEX_A53_ACTLR_ENDCCASCI stcopr16 r0, r1, CORTEX_A53_ACTLR 1: bx lr endfunc errata_a53_855873_wa func check_errata_855873 mov r1, #0x03 b cpu_rev_var_hs endfunc check_errata_855873 /* ------------------------------------------------- * The CPU Ops reset function for Cortex-A53. * Shall clobber: r0-r6 * ------------------------------------------------- */ func cortex_a53_reset_func mov r5, lr bl cpu_get_rev_var mov r4, r0 #if ERRATA_A53_826319 mov r0, r4 bl errata_a53_826319_wa #endif #if ERRATA_A53_836870 mov r0, r4 bl a53_disable_non_temporal_hint #endif #if ERRATA_A53_855873 mov r0, r4 bl errata_a53_855873_wa #endif /* --------------------------------------------- * Enable the SMP bit. * --------------------------------------------- */ ldcopr16 r0, r1, CORTEX_A53_ECTLR orr64_imm r0, r1, CORTEX_A53_ECTLR_SMP_BIT stcopr16 r0, r1, CORTEX_A53_ECTLR isb bx r5 endfunc cortex_a53_reset_func /* ---------------------------------------------------- * The CPU Ops core power down function for Cortex-A53. * ---------------------------------------------------- */ func cortex_a53_core_pwr_dwn push {r12, lr} /* Assert if cache is enabled */ #if ASM_ASSERTION ldcopr r0, SCTLR tst r0, #SCTLR_C_BIT ASM_ASSERT(eq) #endif /* --------------------------------------------- * Flush L1 caches. * --------------------------------------------- */ mov r0, #DC_OP_CISW bl dcsw_op_level1 /* --------------------------------------------- * Come out of intra cluster coherency * --------------------------------------------- */ pop {r12, lr} b cortex_a53_disable_smp endfunc cortex_a53_core_pwr_dwn /* ------------------------------------------------------- * The CPU Ops cluster power down function for Cortex-A53. * Clobbers: r0-r3 * ------------------------------------------------------- */ func cortex_a53_cluster_pwr_dwn push {r12, lr} /* Assert if cache is enabled */ #if ASM_ASSERTION ldcopr r0, SCTLR tst r0, #SCTLR_C_BIT ASM_ASSERT(eq) #endif /* --------------------------------------------- * Flush L1 caches. * --------------------------------------------- */ mov r0, #DC_OP_CISW bl dcsw_op_level1 /* --------------------------------------------- * Disable the optional ACP. * --------------------------------------------- */ bl plat_disable_acp /* --------------------------------------------- * Flush L2 caches. * --------------------------------------------- */ mov r0, #DC_OP_CISW bl dcsw_op_level2 /* --------------------------------------------- * Come out of intra cluster coherency * --------------------------------------------- */ pop {r12, lr} 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 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_A53_826319, cortex_a53, 826319 report_errata ERRATA_A53_836870, cortex_a53, disable_non_temporal_hint report_errata ERRATA_A53_855873, cortex_a53, 855873 pop {r12, lr} bx lr endfunc cortex_a53_errata_report #endif declare_cpu_ops cortex_a53, CORTEX_A53_MIDR, \ cortex_a53_reset_func, \ cortex_a53_core_pwr_dwn, \ cortex_a53_cluster_pwr_dwn