1/* 2 * Copyright (c) 2021-2023, Arm Limited. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7#include <arch.h> 8#include <asm_macros.S> 9#include <common/bl_common.h> 10#include <neoverse_v2.h> 11#include <cpu_macros.S> 12#include <plat_macros.S> 13#include "wa_cve_2022_23960_bhb_vector.S" 14 15/* Hardware handled coherency */ 16#if HW_ASSISTED_COHERENCY == 0 17#error "Neoverse V2 must be compiled with HW_ASSISTED_COHERENCY enabled" 18#endif 19 20/* 64-bit only core */ 21#if CTX_INCLUDE_AARCH32_REGS == 1 22#error "Neoverse V2 supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0" 23#endif 24 25workaround_runtime_start neoverse_v2, ERRATUM(2801372), ERRATA_V2_2801372 26 /* dsb before isb of power down sequence */ 27 dsb sy 28workaround_runtime_end neoverse_v2, ERRATUM(2801372), ERRATA_V2_2801372 29 30check_erratum_ls neoverse_v2, ERRATUM(2801372), CPU_REV(0, 1) 31 32workaround_reset_start neoverse_v2, CVE(2022,23960), WORKAROUND_CVE_2022_23960 33#if IMAGE_BL31 34 /* 35 * The Neoverse-V2 generic vectors are overridden to apply errata 36 * mitigation on exception entry from lower ELs. 37 */ 38 adr x0, wa_cve_vbar_neoverse_v2 39 msr vbar_el3, x0 40#endif /* IMAGE_BL31 */ 41workaround_reset_end neoverse_v2, CVE(2022,23960) 42 43check_erratum_chosen neoverse_v2, CVE(2022, 23960), WORKAROUND_CVE_2022_23960 44 45#if WORKAROUND_CVE_2022_23960 46 wa_cve_2022_23960_bhb_vector_table NEOVERSE_V2_BHB_LOOP_COUNT, neoverse_v2 47#endif /* WORKAROUND_CVE_2022_23960 */ 48 49 /* ---------------------------------------------------- 50 * HW will do the cache maintenance while powering down 51 * ---------------------------------------------------- 52 */ 53func neoverse_v2_core_pwr_dwn 54 /* --------------------------------------------------- 55 * Enable CPU power down bit in power control register 56 * --------------------------------------------------- 57 */ 58 mrs x0, NEOVERSE_V2_CPUPWRCTLR_EL1 59 orr x0, x0, #NEOVERSE_V2_CPUPWRCTLR_EL1_CORE_PWRDN_BIT 60 msr NEOVERSE_V2_CPUPWRCTLR_EL1, x0 61 62 apply_erratum neoverse_v2, ERRATUM(2801372), ERRATA_V2_2801372 63 64 isb 65 ret 66endfunc neoverse_v2_core_pwr_dwn 67 68cpu_reset_func_start neoverse_v2 69 /* Disable speculative loads */ 70 msr SSBS, xzr 71cpu_reset_func_end neoverse_v2 72 73errata_report_shim neoverse_v2 74 /* --------------------------------------------- 75 * This function provides Neoverse V2- 76 * specific register information for crash 77 * reporting. It needs to return with x6 78 * pointing to a list of register names in ascii 79 * and x8 - x15 having values of registers to be 80 * reported. 81 * --------------------------------------------- 82 */ 83.section .rodata.neoverse_v2_regs, "aS" 84neoverse_v2_regs: /* The ascii list of register names to be reported */ 85 .asciz "cpuectlr_el1", "" 86 87func neoverse_v2_cpu_reg_dump 88 adr x6, neoverse_v2_regs 89 mrs x8, NEOVERSE_V2_CPUECTLR_EL1 90 ret 91endfunc neoverse_v2_cpu_reg_dump 92 93declare_cpu_ops neoverse_v2, NEOVERSE_V2_MIDR, \ 94 neoverse_v2_reset_func, \ 95 neoverse_v2_core_pwr_dwn 96