1*91f16700Schasinglulu/* 2*91f16700Schasinglulu * Copyright (c) 2022-2023, Arm Limited. All rights reserved. 3*91f16700Schasinglulu * 4*91f16700Schasinglulu * SPDX-License-Identifier: BSD-3-Clause 5*91f16700Schasinglulu */ 6*91f16700Schasinglulu 7*91f16700Schasinglulu#include <arch.h> 8*91f16700Schasinglulu#include <asm_macros.S> 9*91f16700Schasinglulu#include <common/bl_common.h> 10*91f16700Schasinglulu#include <cortex_x4.h> 11*91f16700Schasinglulu#include <cpu_macros.S> 12*91f16700Schasinglulu#include <plat_macros.S> 13*91f16700Schasinglulu#include "wa_cve_2022_23960_bhb_vector.S" 14*91f16700Schasinglulu 15*91f16700Schasinglulu/* Hardware handled coherency */ 16*91f16700Schasinglulu#if HW_ASSISTED_COHERENCY == 0 17*91f16700Schasinglulu#error "Cortex X4 must be compiled with HW_ASSISTED_COHERENCY enabled" 18*91f16700Schasinglulu#endif 19*91f16700Schasinglulu 20*91f16700Schasinglulu/* 64-bit only core */ 21*91f16700Schasinglulu#if CTX_INCLUDE_AARCH32_REGS == 1 22*91f16700Schasinglulu#error "Cortex X4 supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0" 23*91f16700Schasinglulu#endif 24*91f16700Schasinglulu 25*91f16700Schasinglulu#if WORKAROUND_CVE_2022_23960 26*91f16700Schasinglulu wa_cve_2022_23960_bhb_vector_table CORTEX_X4_BHB_LOOP_COUNT, cortex_x4 27*91f16700Schasinglulu#endif /* WORKAROUND_CVE_2022_23960 */ 28*91f16700Schasinglulu 29*91f16700Schasingluluworkaround_reset_start cortex_x4, CVE(2022, 23960), WORKAROUND_CVE_2022_23960 30*91f16700Schasinglulu#if IMAGE_BL31 31*91f16700Schasinglulu /* 32*91f16700Schasinglulu * The Cortex X4 generic vectors are overridden to apply errata 33*91f16700Schasinglulu * mitigation on exception entry from lower ELs. 34*91f16700Schasinglulu */ 35*91f16700Schasinglulu override_vector_table wa_cve_vbar_cortex_x4 36*91f16700Schasinglulu#endif /* IMAGE_BL31 */ 37*91f16700Schasingluluworkaround_reset_end cortex_x4, CVE(2022, 23960) 38*91f16700Schasinglulu 39*91f16700Schasinglulucheck_erratum_chosen cortex_x4, CVE(2022, 23960), WORKAROUND_CVE_2022_23960 40*91f16700Schasinglulu 41*91f16700Schasinglulucpu_reset_func_start cortex_x4 42*91f16700Schasinglulu /* Disable speculative loads */ 43*91f16700Schasinglulu msr SSBS, xzr 44*91f16700Schasinglulucpu_reset_func_end cortex_x4 45*91f16700Schasinglulu 46*91f16700Schasinglulu /* ---------------------------------------------------- 47*91f16700Schasinglulu * HW will do the cache maintenance while powering down 48*91f16700Schasinglulu * ---------------------------------------------------- 49*91f16700Schasinglulu */ 50*91f16700Schasinglulufunc cortex_x4_core_pwr_dwn 51*91f16700Schasinglulu /* --------------------------------------------------- 52*91f16700Schasinglulu * Enable CPU power down bit in power control register 53*91f16700Schasinglulu * --------------------------------------------------- 54*91f16700Schasinglulu */ 55*91f16700Schasinglulu sysreg_bit_set CORTEX_X4_CPUPWRCTLR_EL1, CORTEX_X4_CPUPWRCTLR_EL1_CORE_PWRDN_BIT 56*91f16700Schasinglulu isb 57*91f16700Schasinglulu ret 58*91f16700Schasingluluendfunc cortex_x4_core_pwr_dwn 59*91f16700Schasinglulu 60*91f16700Schasingluluerrata_report_shim cortex_x4 61*91f16700Schasinglulu 62*91f16700Schasinglulu /* --------------------------------------------- 63*91f16700Schasinglulu * This function provides Cortex X4-specific 64*91f16700Schasinglulu * register information for crash reporting. 65*91f16700Schasinglulu * It needs to return with x6 pointing to 66*91f16700Schasinglulu * a list of register names in ascii and 67*91f16700Schasinglulu * x8 - x15 having values of registers to be 68*91f16700Schasinglulu * reported. 69*91f16700Schasinglulu * --------------------------------------------- 70*91f16700Schasinglulu */ 71*91f16700Schasinglulu.section .rodata.cortex_x4_regs, "aS" 72*91f16700Schasinglulucortex_x4_regs: /* The ascii list of register names to be reported */ 73*91f16700Schasinglulu .asciz "cpuectlr_el1", "" 74*91f16700Schasinglulu 75*91f16700Schasinglulufunc cortex_x4_cpu_reg_dump 76*91f16700Schasinglulu adr x6, cortex_x4_regs 77*91f16700Schasinglulu mrs x8, CORTEX_X4_CPUECTLR_EL1 78*91f16700Schasinglulu ret 79*91f16700Schasingluluendfunc cortex_x4_cpu_reg_dump 80*91f16700Schasinglulu 81*91f16700Schasingluludeclare_cpu_ops cortex_x4, CORTEX_X4_MIDR, \ 82*91f16700Schasinglulu cortex_x4_reset_func, \ 83*91f16700Schasinglulu cortex_x4_core_pwr_dwn 84