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Diffstat (limited to '')
| -rw-r--r-- | lib/cpus/aarch64/cortex_a57.S | 686 |
1 files changed, 686 insertions, 0 deletions
diff --git a/lib/cpus/aarch64/cortex_a57.S b/lib/cpus/aarch64/cortex_a57.S new file mode 100644 index 0000000..3766ec7 --- /dev/null +++ b/lib/cpus/aarch64/cortex_a57.S @@ -0,0 +1,686 @@ +/* + * Copyright (c) 2014-2022, ARM Limited and Contributors. All rights reserved. + * Copyright (c) 2020, NVIDIA Corporation. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ +#include <arch.h> +#include <asm_macros.S> +#include <assert_macros.S> +#include <common/bl_common.h> +#include <common/debug.h> +#include <cortex_a57.h> +#include <cpu_macros.S> +#include <plat_macros.S> + + /* --------------------------------------------- + * Disable L1 data cache and unified L2 cache + * --------------------------------------------- + */ +func cortex_a57_disable_dcache + mrs x1, sctlr_el3 + bic x1, x1, #SCTLR_C_BIT + msr sctlr_el3, x1 + isb + ret +endfunc cortex_a57_disable_dcache + + /* --------------------------------------------- + * Disable all types of L2 prefetches. + * --------------------------------------------- + */ +func cortex_a57_disable_l2_prefetch + mrs x0, CORTEX_A57_ECTLR_EL1 + orr x0, x0, #CORTEX_A57_ECTLR_DIS_TWD_ACC_PFTCH_BIT + mov x1, #CORTEX_A57_ECTLR_L2_IPFTCH_DIST_MASK + orr x1, x1, #CORTEX_A57_ECTLR_L2_DPFTCH_DIST_MASK + bic x0, x0, x1 + msr CORTEX_A57_ECTLR_EL1, x0 + isb + dsb ish + ret +endfunc cortex_a57_disable_l2_prefetch + + /* --------------------------------------------- + * Disable intra-cluster coherency + * --------------------------------------------- + */ +func cortex_a57_disable_smp + mrs x0, CORTEX_A57_ECTLR_EL1 + bic x0, x0, #CORTEX_A57_ECTLR_SMP_BIT + msr CORTEX_A57_ECTLR_EL1, x0 + ret +endfunc cortex_a57_disable_smp + + /* --------------------------------------------- + * Disable debug interfaces + * --------------------------------------------- + */ +func cortex_a57_disable_ext_debug + mov x0, #1 + msr osdlr_el1, x0 + isb +#if ERRATA_A57_817169 + /* + * Invalidate any TLB address + */ + mov x0, #0 + tlbi vae3, x0 +#endif + dsb sy + ret +endfunc cortex_a57_disable_ext_debug + + /* -------------------------------------------------- + * Errata Workaround for Cortex A57 Errata #806969. + * This applies only to revision r0p0 of Cortex A57. + * Inputs: + * x0: variant[4:7] and revision[0:3] of current cpu. + * Shall clobber: x0-x17 + * -------------------------------------------------- + */ +func errata_a57_806969_wa + /* + * Compare x0 against revision r0p0 + */ + mov x17, x30 + bl check_errata_806969 + cbz x0, 1f + mrs x1, CORTEX_A57_CPUACTLR_EL1 + orr x1, x1, #CORTEX_A57_CPUACTLR_EL1_NO_ALLOC_WBWA + msr CORTEX_A57_CPUACTLR_EL1, x1 +1: + ret x17 +endfunc errata_a57_806969_wa + +func check_errata_806969 + mov x1, #0x00 + b cpu_rev_var_ls +endfunc check_errata_806969 + + /* --------------------------------------------------- + * Errata Workaround for Cortex A57 Errata #813419. + * This applies only to revision r0p0 of Cortex A57. + * --------------------------------------------------- + */ +func check_errata_813419 + /* + * Even though this is only needed for revision r0p0, it + * is always applied due to limitations of the current + * errata framework. + */ + mov x0, #ERRATA_APPLIES + ret +endfunc check_errata_813419 + + /* --------------------------------------------------- + * Errata Workaround for Cortex A57 Errata #813420. + * This applies only to revision r0p0 of Cortex A57. + * Inputs: + * x0: variant[4:7] and revision[0:3] of current cpu. + * Shall clobber: x0-x17 + * --------------------------------------------------- + */ +func errata_a57_813420_wa + /* + * Compare x0 against revision r0p0 + */ + mov x17, x30 + bl check_errata_813420 + cbz x0, 1f + mrs x1, CORTEX_A57_CPUACTLR_EL1 + orr x1, x1, #CORTEX_A57_CPUACTLR_EL1_DCC_AS_DCCI + msr CORTEX_A57_CPUACTLR_EL1, x1 +1: + ret x17 +endfunc errata_a57_813420_wa + +func check_errata_813420 + mov x1, #0x00 + b cpu_rev_var_ls +endfunc check_errata_813420 + + /* --------------------------------------------------- + * Errata Workaround for Cortex A57 Errata #814670. + * This applies only to revision r0p0 of Cortex A57. + * Inputs: + * x0: variant[4:7] and revision[0:3] of current cpu. + * Shall clobber: x0-x17 + * --------------------------------------------------- + */ +func errata_a57_814670_wa + /* + * Compare x0 against revision r0p0 + */ + mov x17, x30 + bl check_errata_814670 + cbz x0, 1f + mrs x1, CORTEX_A57_CPUACTLR_EL1 + orr x1, x1, #CORTEX_A57_CPUACTLR_EL1_DIS_DMB_NULLIFICATION + msr CORTEX_A57_CPUACTLR_EL1, x1 + isb +1: + ret x17 +endfunc errata_a57_814670_wa + +func check_errata_814670 + mov x1, #0x00 + b cpu_rev_var_ls +endfunc check_errata_814670 + + /* ---------------------------------------------------- + * Errata Workaround for Cortex A57 Errata #817169. + * This applies only to revision <= r0p1 of Cortex A57. + * ---------------------------------------------------- + */ +func check_errata_817169 + /* + * Even though this is only needed for revision <= r0p1, it + * is always applied because of the low cost of the workaround. + */ + mov x0, #ERRATA_APPLIES + ret +endfunc check_errata_817169 + + /* -------------------------------------------------------------------- + * Disable the over-read from the LDNP instruction. + * + * This applies to all revisions <= r1p2. The performance degradation + * observed with LDNP/STNP has been fixed on r1p3 and onwards. + * + * Inputs: + * x0: variant[4:7] and revision[0:3] of current cpu. + * Shall clobber: x0-x17 + * --------------------------------------------------------------------- + */ +func a57_disable_ldnp_overread + /* + * Compare x0 against revision r1p2 + */ + mov x17, x30 + bl check_errata_disable_ldnp_overread + cbz x0, 1f + mrs x1, CORTEX_A57_CPUACTLR_EL1 + orr x1, x1, #CORTEX_A57_CPUACTLR_EL1_DIS_OVERREAD + msr CORTEX_A57_CPUACTLR_EL1, x1 +1: + ret x17 +endfunc a57_disable_ldnp_overread + +func check_errata_disable_ldnp_overread + mov x1, #0x12 + b cpu_rev_var_ls +endfunc check_errata_disable_ldnp_overread + + /* --------------------------------------------------- + * Errata Workaround for Cortex A57 Errata #826974. + * This applies only to revision <= r1p1 of Cortex A57. + * Inputs: + * x0: variant[4:7] and revision[0:3] of current cpu. + * Shall clobber: x0-x17 + * --------------------------------------------------- + */ +func errata_a57_826974_wa + /* + * Compare x0 against revision r1p1 + */ + mov x17, x30 + bl check_errata_826974 + cbz x0, 1f + mrs x1, CORTEX_A57_CPUACTLR_EL1 + orr x1, x1, #CORTEX_A57_CPUACTLR_EL1_DIS_LOAD_PASS_DMB + msr CORTEX_A57_CPUACTLR_EL1, x1 +1: + ret x17 +endfunc errata_a57_826974_wa + +func check_errata_826974 + mov x1, #0x11 + b cpu_rev_var_ls +endfunc check_errata_826974 + + /* --------------------------------------------------- + * Errata Workaround for Cortex A57 Errata #826977. + * This applies only to revision <= r1p1 of Cortex A57. + * Inputs: + * x0: variant[4:7] and revision[0:3] of current cpu. + * Shall clobber: x0-x17 + * --------------------------------------------------- + */ +func errata_a57_826977_wa + /* + * Compare x0 against revision r1p1 + */ + mov x17, x30 + bl check_errata_826977 + cbz x0, 1f + mrs x1, CORTEX_A57_CPUACTLR_EL1 + orr x1, x1, #CORTEX_A57_CPUACTLR_EL1_GRE_NGRE_AS_NGNRE + msr CORTEX_A57_CPUACTLR_EL1, x1 +1: + ret x17 +endfunc errata_a57_826977_wa + +func check_errata_826977 + mov x1, #0x11 + b cpu_rev_var_ls +endfunc check_errata_826977 + + /* --------------------------------------------------- + * Errata Workaround for Cortex A57 Errata #828024. + * This applies only to revision <= r1p1 of Cortex A57. + * Inputs: + * x0: variant[4:7] and revision[0:3] of current cpu. + * Shall clobber: x0-x17 + * --------------------------------------------------- + */ +func errata_a57_828024_wa + /* + * Compare x0 against revision r1p1 + */ + mov x17, x30 + bl check_errata_828024 + cbz x0, 1f + mrs x1, CORTEX_A57_CPUACTLR_EL1 + /* + * Setting the relevant bits in CPUACTLR_EL1 has to be done in 2 + * instructions here because the resulting bitmask doesn't fit in a + * 16-bit value so it cannot be encoded in a single instruction. + */ + orr x1, x1, #CORTEX_A57_CPUACTLR_EL1_NO_ALLOC_WBWA + orr x1, x1, #(CORTEX_A57_CPUACTLR_EL1_DIS_L1_STREAMING | \ + CORTEX_A57_CPUACTLR_EL1_DIS_STREAMING) + msr CORTEX_A57_CPUACTLR_EL1, x1 +1: + ret x17 +endfunc errata_a57_828024_wa + +func check_errata_828024 + mov x1, #0x11 + b cpu_rev_var_ls +endfunc check_errata_828024 + + /* --------------------------------------------------- + * Errata Workaround for Cortex A57 Errata #829520. + * This applies only to revision <= r1p2 of Cortex A57. + * Inputs: + * x0: variant[4:7] and revision[0:3] of current cpu. + * Shall clobber: x0-x17 + * --------------------------------------------------- + */ +func errata_a57_829520_wa + /* + * Compare x0 against revision r1p2 + */ + mov x17, x30 + bl check_errata_829520 + cbz x0, 1f + mrs x1, CORTEX_A57_CPUACTLR_EL1 + orr x1, x1, #CORTEX_A57_CPUACTLR_EL1_DIS_INDIRECT_PREDICTOR + msr CORTEX_A57_CPUACTLR_EL1, x1 +1: + ret x17 +endfunc errata_a57_829520_wa + +func check_errata_829520 + mov x1, #0x12 + b cpu_rev_var_ls +endfunc check_errata_829520 + + /* --------------------------------------------------- + * Errata Workaround for Cortex A57 Errata #833471. + * This applies only to revision <= r1p2 of Cortex A57. + * Inputs: + * x0: variant[4:7] and revision[0:3] of current cpu. + * Shall clobber: x0-x17 + * --------------------------------------------------- + */ +func errata_a57_833471_wa + /* + * Compare x0 against revision r1p2 + */ + mov x17, x30 + bl check_errata_833471 + cbz x0, 1f + mrs x1, CORTEX_A57_CPUACTLR_EL1 + orr x1, x1, #CORTEX_A57_CPUACTLR_EL1_FORCE_FPSCR_FLUSH + msr CORTEX_A57_CPUACTLR_EL1, x1 +1: + ret x17 +endfunc errata_a57_833471_wa + +func check_errata_833471 + mov x1, #0x12 + b cpu_rev_var_ls +endfunc check_errata_833471 + + /* -------------------------------------------------- + * Errata Workaround for Cortex A57 Errata #859972. + * This applies only to revision <= r1p3 of Cortex A57. + * Inputs: + * x0: variant[4:7] and revision[0:3] of current cpu. + * Shall clobber: + * -------------------------------------------------- + */ +func errata_a57_859972_wa + mov x17, x30 + bl check_errata_859972 + cbz x0, 1f + mrs x1, CORTEX_A57_CPUACTLR_EL1 + orr x1, x1, #CORTEX_A57_CPUACTLR_EL1_DIS_INSTR_PREFETCH + msr CORTEX_A57_CPUACTLR_EL1, x1 +1: + ret x17 +endfunc errata_a57_859972_wa + +func check_errata_859972 + mov x1, #0x13 + b cpu_rev_var_ls +endfunc check_errata_859972 + +func check_errata_cve_2017_5715 +#if WORKAROUND_CVE_2017_5715 + mov x0, #ERRATA_APPLIES +#else + mov x0, #ERRATA_MISSING +#endif + ret +endfunc check_errata_cve_2017_5715 + +func check_errata_cve_2018_3639 +#if WORKAROUND_CVE_2018_3639 + mov x0, #ERRATA_APPLIES +#else + mov x0, #ERRATA_MISSING +#endif + ret +endfunc check_errata_cve_2018_3639 + + /* -------------------------------------------------- + * Errata workaround for Cortex A57 Errata #1319537. + * This applies to all revisions of Cortex A57. + * -------------------------------------------------- + */ +func check_errata_1319537 +#if ERRATA_A57_1319537 + mov x0, #ERRATA_APPLIES +#else + mov x0, #ERRATA_MISSING +#endif + ret +endfunc check_errata_1319537 + + /* ------------------------------------------------- + * The CPU Ops reset function for Cortex-A57. + * Shall clobber: x0-x19 + * ------------------------------------------------- + */ +func cortex_a57_reset_func + mov x19, x30 + bl cpu_get_rev_var + mov x18, x0 + +#if ERRATA_A57_806969 + mov x0, x18 + bl errata_a57_806969_wa +#endif + +#if ERRATA_A57_813420 + mov x0, x18 + bl errata_a57_813420_wa +#endif + +#if ERRATA_A57_814670 + mov x0, x18 + bl errata_a57_814670_wa +#endif + +#if A57_DISABLE_NON_TEMPORAL_HINT + mov x0, x18 + bl a57_disable_ldnp_overread +#endif + +#if ERRATA_A57_826974 + mov x0, x18 + bl errata_a57_826974_wa +#endif + +#if ERRATA_A57_826977 + mov x0, x18 + bl errata_a57_826977_wa +#endif + +#if ERRATA_A57_828024 + mov x0, x18 + bl errata_a57_828024_wa +#endif + +#if ERRATA_A57_829520 + mov x0, x18 + bl errata_a57_829520_wa +#endif + +#if ERRATA_A57_833471 + mov x0, x18 + bl errata_a57_833471_wa +#endif + +#if ERRATA_A57_859972 + mov x0, x18 + bl errata_a57_859972_wa +#endif + +#if IMAGE_BL31 && ( WORKAROUND_CVE_2017_5715 || WORKAROUND_CVE_2022_23960 ) + /* --------------------------------------------------------------- + * Override vector table & enable existing workaround if either of + * the build flags are enabled + * --------------------------------------------------------------- + */ + adr x0, wa_cve_2017_5715_mmu_vbar + msr vbar_el3, x0 + /* isb will be performed before returning from this function */ +#endif + +#if WORKAROUND_CVE_2018_3639 + mrs x0, CORTEX_A57_CPUACTLR_EL1 + orr x0, x0, #CORTEX_A57_CPUACTLR_EL1_DIS_LOAD_PASS_STORE + msr CORTEX_A57_CPUACTLR_EL1, x0 + isb + dsb sy +#endif + +#if A57_ENABLE_NONCACHEABLE_LOAD_FWD + /* --------------------------------------------- + * Enable higher performance non-cacheable load + * forwarding + * --------------------------------------------- + */ + mrs x0, CORTEX_A57_CPUACTLR_EL1 + orr x0, x0, #CORTEX_A57_CPUACTLR_EL1_EN_NC_LOAD_FWD + msr CORTEX_A57_CPUACTLR_EL1, x0 +#endif + + /* --------------------------------------------- + * Enable the SMP bit. + * --------------------------------------------- + */ + mrs x0, CORTEX_A57_ECTLR_EL1 + orr x0, x0, #CORTEX_A57_ECTLR_SMP_BIT + msr CORTEX_A57_ECTLR_EL1, x0 + isb + ret x19 +endfunc cortex_a57_reset_func + +func check_errata_cve_2022_23960 +#if WORKAROUND_CVE_2022_23960 + mov x0, #ERRATA_APPLIES +#else + mov x0, #ERRATA_MISSING +#endif + ret +endfunc check_errata_cve_2022_23960 + +func check_smccc_arch_workaround_3 + mov x0, #ERRATA_APPLIES + ret +endfunc check_smccc_arch_workaround_3 + + /* ---------------------------------------------------- + * The CPU Ops core power down function for Cortex-A57. + * ---------------------------------------------------- + */ +func cortex_a57_core_pwr_dwn + mov x18, x30 + + /* --------------------------------------------- + * Turn off caches. + * --------------------------------------------- + */ + bl cortex_a57_disable_dcache + + /* --------------------------------------------- + * Disable the L2 prefetches. + * --------------------------------------------- + */ + bl cortex_a57_disable_l2_prefetch + + /* --------------------------------------------- + * Flush L1 caches. + * --------------------------------------------- + */ + mov x0, #DCCISW + bl dcsw_op_level1 + + /* --------------------------------------------- + * Come out of intra cluster coherency + * --------------------------------------------- + */ + bl cortex_a57_disable_smp + + /* --------------------------------------------- + * Force the debug interfaces to be quiescent + * --------------------------------------------- + */ + mov x30, x18 + b cortex_a57_disable_ext_debug +endfunc cortex_a57_core_pwr_dwn + + /* ------------------------------------------------------- + * The CPU Ops cluster power down function for Cortex-A57. + * ------------------------------------------------------- + */ +func cortex_a57_cluster_pwr_dwn + mov x18, x30 + + /* --------------------------------------------- + * Turn off caches. + * --------------------------------------------- + */ + bl cortex_a57_disable_dcache + + /* --------------------------------------------- + * Disable the L2 prefetches. + * --------------------------------------------- + */ + bl cortex_a57_disable_l2_prefetch + +#if !SKIP_A57_L1_FLUSH_PWR_DWN + /* ------------------------------------------------- + * Flush the 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_a57_disable_smp + + /* --------------------------------------------- + * Force the debug interfaces to be quiescent + * --------------------------------------------- + */ + mov x30, x18 + b cortex_a57_disable_ext_debug +endfunc cortex_a57_cluster_pwr_dwn + +#if REPORT_ERRATA +/* + * Errata printing function for Cortex A57. Must follow AAPCS. + */ +func cortex_a57_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_A57_806969, cortex_a57, 806969 + report_errata ERRATA_A57_813419, cortex_a57, 813419 + report_errata ERRATA_A57_813420, cortex_a57, 813420 + report_errata ERRATA_A57_814670, cortex_a57, 814670 + report_errata ERRATA_A57_817169, cortex_a57, 817169 + report_errata A57_DISABLE_NON_TEMPORAL_HINT, cortex_a57, \ + disable_ldnp_overread + report_errata ERRATA_A57_826974, cortex_a57, 826974 + report_errata ERRATA_A57_826977, cortex_a57, 826977 + report_errata ERRATA_A57_828024, cortex_a57, 828024 + report_errata ERRATA_A57_829520, cortex_a57, 829520 + report_errata ERRATA_A57_833471, cortex_a57, 833471 + report_errata ERRATA_A57_859972, cortex_a57, 859972 + report_errata ERRATA_A57_1319537, cortex_a57, 1319537 + report_errata WORKAROUND_CVE_2017_5715, cortex_a57, cve_2017_5715 + report_errata WORKAROUND_CVE_2018_3639, cortex_a57, cve_2018_3639 + report_errata WORKAROUND_CVE_2022_23960, cortex_a57, cve_2022_23960 + + ldp x8, x30, [sp], #16 + ret +endfunc cortex_a57_errata_report +#endif + + /* --------------------------------------------- + * This function provides cortex_a57 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_a57_regs, "aS" +cortex_a57_regs: /* The ascii list of register names to be reported */ + .asciz "cpuectlr_el1", "cpumerrsr_el1", "l2merrsr_el1", "" + +func cortex_a57_cpu_reg_dump + adr x6, cortex_a57_regs + mrs x8, CORTEX_A57_ECTLR_EL1 + mrs x9, CORTEX_A57_MERRSR_EL1 + mrs x10, CORTEX_A57_L2MERRSR_EL1 + ret +endfunc cortex_a57_cpu_reg_dump + +declare_cpu_ops_wa cortex_a57, CORTEX_A57_MIDR, \ + cortex_a57_reset_func, \ + check_errata_cve_2017_5715, \ + CPU_NO_EXTRA2_FUNC, \ + check_smccc_arch_workaround_3, \ + cortex_a57_core_pwr_dwn, \ + cortex_a57_cluster_pwr_dwn |