lib/cpus/aarch64/neoverse_n1.S - filogic/atf - Gitiles

 /*
  * Copyright (c) 2017-2023, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */

 #include <arch.h>
 #include <asm_macros.S>
 #include <cpuamu.h>
 #include <cpu_macros.S>
 #include <neoverse_n1.h>
 #include "wa_cve_2022_23960_bhb_vector.S"

 /* Hardware handled coherency */
 #if HW_ASSISTED_COHERENCY == 0
 #error "Neoverse N1 must be compiled with HW_ASSISTED_COHERENCY enabled"
 #endif

 /* 64-bit only core */
 #if CTX_INCLUDE_AARCH32_REGS == 1
 #error "Neoverse-N1 supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0"
 #endif

 	.global neoverse_n1_errata_ic_trap_handler

 #if WORKAROUND_CVE_2022_23960
 	wa_cve_2022_23960_bhb_vector_table NEOVERSE_N1_BHB_LOOP_COUNT, neoverse_n1
 #endif /* WORKAROUND_CVE_2022_23960 */

 /*
  * ERRATA_DSU_936184:
  * The errata is defined in dsu_helpers.S and applies to Neoverse N1.
  * Henceforth creating symbolic names to the already existing errata
  * workaround functions to get them registered under the Errata Framework.
  */
 .equ check_erratum_neoverse_n1_936184, check_errata_dsu_936184
 .equ erratum_neoverse_n1_936184_wa, errata_dsu_936184_wa
 add_erratum_entry neoverse_n1, ERRATUM(936184), ERRATA_DSU_936184, APPLY_AT_RESET

 workaround_reset_start neoverse_n1, ERRATUM(1043202), ERRATA_N1_1043202
 	/* Apply instruction patching sequence */
 	ldr	x0, =0x0
 	msr	CPUPSELR_EL3, x0
 	ldr	x0, =0xF3BF8F2F
 	msr	CPUPOR_EL3, x0
 	ldr	x0, =0xFFFFFFFF
 	msr	CPUPMR_EL3, x0
 	ldr	x0, =0x800200071
 	msr	CPUPCR_EL3, x0
 workaround_reset_end neoverse_n1, ERRATUM(1043202)

 check_erratum_ls neoverse_n1, ERRATUM(1043202), CPU_REV(1, 0)

 workaround_reset_start neoverse_n1, ERRATUM(1073348), ERRATA_N1_1073348
 	sysreg_bit_set NEOVERSE_N1_CPUACTLR_EL1, NEOVERSE_N1_CPUACTLR_EL1_BIT_6
 workaround_reset_end neoverse_n1, ERRATUM(1073348)

 check_erratum_ls neoverse_n1, ERRATUM(1073348), CPU_REV(1, 0)

 workaround_reset_start neoverse_n1, ERRATUM(1130799), ERRATA_N1_1130799
 	sysreg_bit_set NEOVERSE_N1_CPUACTLR2_EL1, NEOVERSE_N1_CPUACTLR2_EL1_BIT_59
 workaround_reset_end neoverse_n1, ERRATUM(1130799)

 check_erratum_ls neoverse_n1, ERRATUM(1130799), CPU_REV(2, 0)

 workaround_reset_start neoverse_n1, ERRATUM(1165347), ERRATA_N1_1165347
 	sysreg_bit_set NEOVERSE_N1_CPUACTLR2_EL1, NEOVERSE_N1_CPUACTLR2_EL1_BIT_0
 	sysreg_bit_set NEOVERSE_N1_CPUACTLR2_EL1, NEOVERSE_N1_CPUACTLR2_EL1_BIT_15
 workaround_reset_end neoverse_n1, ERRATUM(1165347)

 check_erratum_ls neoverse_n1, ERRATUM(1165347), CPU_REV(2, 0)

 workaround_reset_start neoverse_n1, ERRATUM(1207823), ERRATA_N1_1207823
 	sysreg_bit_set NEOVERSE_N1_CPUACTLR2_EL1, NEOVERSE_N1_CPUACTLR2_EL1_BIT_11
 workaround_reset_end neoverse_n1, ERRATUM(1207823)

 check_erratum_ls neoverse_n1, ERRATUM(1207823), CPU_REV(2, 0)

 workaround_reset_start neoverse_n1, ERRATUM(1220197), ERRATA_N1_1220197
 	sysreg_bit_set NEOVERSE_N1_CPUECTLR_EL1, NEOVERSE_N1_WS_THR_L2_MASK
 workaround_reset_end neoverse_n1, ERRATUM(1220197)

 check_erratum_ls neoverse_n1, ERRATUM(1220197), CPU_REV(2, 0)

 workaround_reset_start neoverse_n1, ERRATUM(1257314), ERRATA_N1_1257314
 	sysreg_bit_set NEOVERSE_N1_CPUACTLR3_EL1, NEOVERSE_N1_CPUACTLR3_EL1_BIT_10
 workaround_reset_end neoverse_n1, ERRATUM(1257314)

 check_erratum_ls neoverse_n1, ERRATUM(1257314), CPU_REV(3, 0)

 workaround_reset_start neoverse_n1, ERRATUM(1262606), ERRATA_N1_1262606
 	sysreg_bit_set NEOVERSE_N1_CPUACTLR_EL1, NEOVERSE_N1_CPUACTLR_EL1_BIT_13
 workaround_reset_end neoverse_n1, ERRATUM(1262606)

 check_erratum_ls neoverse_n1, ERRATUM(1262606), CPU_REV(3, 0)

 workaround_reset_start neoverse_n1, ERRATUM(1262888), ERRATA_N1_1262888
 	sysreg_bit_set NEOVERSE_N1_CPUECTLR_EL1, NEOVERSE_N1_CPUECTLR_EL1_MM_TLBPF_DIS_BIT
 workaround_reset_end neoverse_n1, ERRATUM(1262888)

 check_erratum_ls neoverse_n1, ERRATUM(1262888), CPU_REV(3, 0)

 workaround_reset_start neoverse_n1, ERRATUM(1275112), ERRATA_N1_1275112
 	sysreg_bit_set NEOVERSE_N1_CPUACTLR_EL1, NEOVERSE_N1_CPUACTLR_EL1_BIT_13
 workaround_reset_end neoverse_n1, ERRATUM(1275112)

 check_erratum_ls neoverse_n1, ERRATUM(1275112), CPU_REV(3, 0)

 workaround_reset_start neoverse_n1, ERRATUM(1315703), ERRATA_N1_1315703
 	sysreg_bit_set NEOVERSE_N1_CPUACTLR2_EL1, NEOVERSE_N1_CPUACTLR2_EL1_BIT_16
 workaround_reset_end neoverse_n1, ERRATUM(1315703)

 check_erratum_ls neoverse_n1, ERRATUM(1315703), CPU_REV(3, 0)

 workaround_reset_start neoverse_n1, ERRATUM(1542419), ERRATA_N1_1542419
 	/* Apply instruction patching sequence */
 	ldr	x0, =0x0
 	msr	CPUPSELR_EL3, x0
 	ldr	x0, =0xEE670D35
 	msr	CPUPOR_EL3, x0
 	ldr	x0, =0xFFFF0FFF
 	msr	CPUPMR_EL3, x0
 	ldr	x0, =0x08000020007D
 	msr	CPUPCR_EL3, x0
 	isb
 workaround_reset_end neoverse_n1, ERRATUM(1542419)

 check_erratum_range neoverse_n1, ERRATUM(1542419), CPU_REV(3, 0), CPU_REV(4, 0)

 workaround_reset_start neoverse_n1, ERRATUM(1868343), ERRATA_N1_1868343
 	sysreg_bit_set NEOVERSE_N1_CPUACTLR_EL1, NEOVERSE_N1_CPUACTLR_EL1_BIT_13
 workaround_reset_end neoverse_n1, ERRATUM(1868343)

 check_erratum_ls neoverse_n1, ERRATUM(1868343), CPU_REV(4, 0)

 workaround_reset_start neoverse_n1, ERRATUM(1946160), ERRATA_N1_1946160
 	mov	x0, #3
 	msr	S3_6_C15_C8_0, x0
 	ldr	x0, =0x10E3900002
 	msr	S3_6_C15_C8_2, x0
 	ldr	x0, =0x10FFF00083
 	msr	S3_6_C15_C8_3, x0
 	ldr	x0, =0x2001003FF
 	msr	S3_6_C15_C8_1, x0
 	mov	x0, #4
 	msr	S3_6_C15_C8_0, x0
 	ldr	x0, =0x10E3800082
 	msr	S3_6_C15_C8_2, x0
 	ldr	x0, =0x10FFF00083
 	msr	S3_6_C15_C8_3, x0
 	ldr	x0, =0x2001003FF
 	msr	S3_6_C15_C8_1, x0
 	mov	x0, #5
 	msr	S3_6_C15_C8_0, x0
 	ldr	x0, =0x10E3800200
 	msr	S3_6_C15_C8_2, x0
 	ldr	x0, =0x10FFF003E0
 	msr	S3_6_C15_C8_3, x0
 	ldr	x0, =0x2001003FF
 	msr	S3_6_C15_C8_1, x0
 	isb
 workaround_reset_end neoverse_n1, ERRATUM(1946160)

 check_erratum_range neoverse_n1, ERRATUM(1946160), CPU_REV(3, 0), CPU_REV(4, 1)

 workaround_runtime_start neoverse_n1, ERRATUM(2743102), ERRATA_N1_2743102
 	/* dsb before isb of power down sequence */
 	dsb	sy
 workaround_runtime_end neoverse_n1, ERRATUM(2743102)

 check_erratum_ls neoverse_n1, ERRATUM(2743102), CPU_REV(4, 1)

 workaround_reset_start neoverse_n1, CVE(2022, 23960), WORKAROUND_CVE_2022_23960
 #if IMAGE_BL31
 	/*
 	 * The Neoverse-N1 generic vectors are overridden to apply errata
 	 * mitigation on exception entry from lower ELs.
 	 */
 	override_vector_table wa_cve_vbar_neoverse_n1
 #endif /* IMAGE_BL31 */
 workaround_reset_end neoverse_n1, CVE(2022, 23960)

 check_erratum_chosen neoverse_n1, CVE(2022, 23960), WORKAROUND_CVE_2022_23960

 /* --------------------------------------------------
  * Disable speculative loads if Neoverse N1 supports
  * SSBS.
  *
  * Shall clobber: x0.
  * --------------------------------------------------
  */
 func neoverse_n1_disable_speculative_loads
 	/* Check if the PE implements SSBS */
 	mrs	x0, id_aa64pfr1_el1
 	tst	x0, #(ID_AA64PFR1_EL1_SSBS_MASK << ID_AA64PFR1_EL1_SSBS_SHIFT)
 	b.eq	1f

 	/* Disable speculative loads */
 	msr	SSBS, xzr

 1:
 	ret
 endfunc neoverse_n1_disable_speculative_loads

 cpu_reset_func_start neoverse_n1
 	bl neoverse_n1_disable_speculative_loads

 	/* Forces all cacheable atomic instructions to be near */
 	sysreg_bit_set NEOVERSE_N1_CPUACTLR2_EL1, NEOVERSE_N1_CPUACTLR2_EL1_BIT_2
 	isb

 #if ENABLE_FEAT_AMU
 	/* Make sure accesses from EL0/EL1 and EL2 are not trapped to EL3 */
 	sysreg_bit_set actlr_el3, NEOVERSE_N1_ACTLR_AMEN_BIT
 	/* Make sure accesses from EL0/EL1 are not trapped to EL2 */
 	sysreg_bit_set actlr_el2, NEOVERSE_N1_ACTLR_AMEN_BIT
 	/* Enable group0 counters */
 	mov	x0, #NEOVERSE_N1_AMU_GROUP0_MASK
 	msr	CPUAMCNTENSET_EL0, x0
 #endif

 #if NEOVERSE_Nx_EXTERNAL_LLC
 	/* Some system may have External LLC, core needs to be made aware */
 	sysreg_bit_set NEOVERSE_N1_CPUECTLR_EL1, NEOVERSE_N1_CPUECTLR_EL1_EXTLLC_BIT
 #endif
 cpu_reset_func_end neoverse_n1

 	/* ---------------------------------------------
 	 * HW will do the cache maintenance while powering down
 	 * ---------------------------------------------
 	 */
 func neoverse_n1_core_pwr_dwn
 	/* ---------------------------------------------
 	 * Enable CPU power down bit in power control register
 	 * ---------------------------------------------
 	 */
 	sysreg_bit_set NEOVERSE_N1_CPUPWRCTLR_EL1, NEOVERSE_N1_CORE_PWRDN_EN_MASK

 	apply_erratum neoverse_n1, ERRATUM(2743102), ERRATA_N1_2743102

 	isb
 	ret
 endfunc neoverse_n1_core_pwr_dwn

 errata_report_shim neoverse_n1

 /*
  * Handle trap of EL0 IC IVAU instructions to EL3 by executing a TLB
  * inner-shareable invalidation to an arbitrary address followed by a DSB.
  *
  * x1: Exception Syndrome
  */
 func neoverse_n1_errata_ic_trap_handler
 	cmp	x1, #NEOVERSE_N1_EC_IC_TRAP
 	b.ne	1f
 	tlbi	vae3is, xzr
 	dsb	sy

 	# Skip the IC instruction itself
 	mrs     x3, elr_el3
 	add     x3, x3, #4
 	msr     elr_el3, x3

 	ldp	x0, x1, [sp, #CTX_GPREGS_OFFSET + CTX_GPREG_X0]
 	ldp	x2, x3, [sp, #CTX_GPREGS_OFFSET + CTX_GPREG_X2]
 	ldp	x4, x5, [sp, #CTX_GPREGS_OFFSET + CTX_GPREG_X4]
 	ldr	x30, [sp, #CTX_GPREGS_OFFSET + CTX_GPREG_LR]

 	/*
 	 * Issue Error Synchronization Barrier to synchronize SErrors before
 	 * exiting EL3. We're running with EAs unmasked, so any synchronized
 	 * errors would be taken immediately; therefore no need to inspect
 	 * DISR_EL1 register.
 	 */
 	esb
 	exception_return
 1:
 	ret
 endfunc neoverse_n1_errata_ic_trap_handler

 	/* ---------------------------------------------
 	 * This function provides neoverse_n1 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.neoverse_n1_regs, "aS"
 neoverse_n1_regs:  /* The ascii list of register names to be reported */
 	.asciz	"cpuectlr_el1", ""

 func neoverse_n1_cpu_reg_dump
 	adr	x6, neoverse_n1_regs
 	mrs	x8, NEOVERSE_N1_CPUECTLR_EL1
 	ret
 endfunc neoverse_n1_cpu_reg_dump

 declare_cpu_ops_eh neoverse_n1, NEOVERSE_N1_MIDR, \
 	neoverse_n1_reset_func, \
 	neoverse_n1_errata_ic_trap_handler, \
 	neoverse_n1_core_pwr_dwn
	/*
	* Copyright (c) 2017-2023, Arm Limited and Contributors. All rights reserved.
	*
	* SPDX-License-Identifier: BSD-3-Clause
	*/

	#include <arch.h>
	#include <asm_macros.S>
	#include <cpuamu.h>
	#include <cpu_macros.S>
	#include <neoverse_n1.h>
	#include "wa_cve_2022_23960_bhb_vector.S"

	/* Hardware handled coherency */
	#if HW_ASSISTED_COHERENCY == 0
	#error "Neoverse N1 must be compiled with HW_ASSISTED_COHERENCY enabled"
	#endif

	/* 64-bit only core */
	#if CTX_INCLUDE_AARCH32_REGS == 1
	#error "Neoverse-N1 supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0"
	#endif

	.global neoverse_n1_errata_ic_trap_handler

	#if WORKAROUND_CVE_2022_23960
	wa_cve_2022_23960_bhb_vector_table NEOVERSE_N1_BHB_LOOP_COUNT, neoverse_n1
	#endif /* WORKAROUND_CVE_2022_23960 */

	/*
	* ERRATA_DSU_936184:
	* The errata is defined in dsu_helpers.S and applies to Neoverse N1.
	* Henceforth creating symbolic names to the already existing errata
	* workaround functions to get them registered under the Errata Framework.
	*/
	.equ check_erratum_neoverse_n1_936184, check_errata_dsu_936184
	.equ erratum_neoverse_n1_936184_wa, errata_dsu_936184_wa
	add_erratum_entry neoverse_n1, ERRATUM(936184), ERRATA_DSU_936184, APPLY_AT_RESET

	workaround_reset_start neoverse_n1, ERRATUM(1043202), ERRATA_N1_1043202
	/* Apply instruction patching sequence */
	ldr x0, =0x0
	msr CPUPSELR_EL3, x0
	ldr x0, =0xF3BF8F2F
	msr CPUPOR_EL3, x0
	ldr x0, =0xFFFFFFFF
	msr CPUPMR_EL3, x0
	ldr x0, =0x800200071
	msr CPUPCR_EL3, x0
	workaround_reset_end neoverse_n1, ERRATUM(1043202)

	check_erratum_ls neoverse_n1, ERRATUM(1043202), CPU_REV(1, 0)

	workaround_reset_start neoverse_n1, ERRATUM(1073348), ERRATA_N1_1073348
	sysreg_bit_set NEOVERSE_N1_CPUACTLR_EL1, NEOVERSE_N1_CPUACTLR_EL1_BIT_6
	workaround_reset_end neoverse_n1, ERRATUM(1073348)

	check_erratum_ls neoverse_n1, ERRATUM(1073348), CPU_REV(1, 0)

	workaround_reset_start neoverse_n1, ERRATUM(1130799), ERRATA_N1_1130799
	sysreg_bit_set NEOVERSE_N1_CPUACTLR2_EL1, NEOVERSE_N1_CPUACTLR2_EL1_BIT_59
	workaround_reset_end neoverse_n1, ERRATUM(1130799)

	check_erratum_ls neoverse_n1, ERRATUM(1130799), CPU_REV(2, 0)

	workaround_reset_start neoverse_n1, ERRATUM(1165347), ERRATA_N1_1165347
	sysreg_bit_set NEOVERSE_N1_CPUACTLR2_EL1, NEOVERSE_N1_CPUACTLR2_EL1_BIT_0
	sysreg_bit_set NEOVERSE_N1_CPUACTLR2_EL1, NEOVERSE_N1_CPUACTLR2_EL1_BIT_15
	workaround_reset_end neoverse_n1, ERRATUM(1165347)

	check_erratum_ls neoverse_n1, ERRATUM(1165347), CPU_REV(2, 0)

	workaround_reset_start neoverse_n1, ERRATUM(1207823), ERRATA_N1_1207823
	sysreg_bit_set NEOVERSE_N1_CPUACTLR2_EL1, NEOVERSE_N1_CPUACTLR2_EL1_BIT_11
	workaround_reset_end neoverse_n1, ERRATUM(1207823)

	check_erratum_ls neoverse_n1, ERRATUM(1207823), CPU_REV(2, 0)

	workaround_reset_start neoverse_n1, ERRATUM(1220197), ERRATA_N1_1220197
	sysreg_bit_set NEOVERSE_N1_CPUECTLR_EL1, NEOVERSE_N1_WS_THR_L2_MASK
	workaround_reset_end neoverse_n1, ERRATUM(1220197)

	check_erratum_ls neoverse_n1, ERRATUM(1220197), CPU_REV(2, 0)

	workaround_reset_start neoverse_n1, ERRATUM(1257314), ERRATA_N1_1257314
	sysreg_bit_set NEOVERSE_N1_CPUACTLR3_EL1, NEOVERSE_N1_CPUACTLR3_EL1_BIT_10
	workaround_reset_end neoverse_n1, ERRATUM(1257314)

	check_erratum_ls neoverse_n1, ERRATUM(1257314), CPU_REV(3, 0)

	workaround_reset_start neoverse_n1, ERRATUM(1262606), ERRATA_N1_1262606
	sysreg_bit_set NEOVERSE_N1_CPUACTLR_EL1, NEOVERSE_N1_CPUACTLR_EL1_BIT_13
	workaround_reset_end neoverse_n1, ERRATUM(1262606)

	check_erratum_ls neoverse_n1, ERRATUM(1262606), CPU_REV(3, 0)

	workaround_reset_start neoverse_n1, ERRATUM(1262888), ERRATA_N1_1262888
	sysreg_bit_set NEOVERSE_N1_CPUECTLR_EL1, NEOVERSE_N1_CPUECTLR_EL1_MM_TLBPF_DIS_BIT
	workaround_reset_end neoverse_n1, ERRATUM(1262888)

	check_erratum_ls neoverse_n1, ERRATUM(1262888), CPU_REV(3, 0)

	workaround_reset_start neoverse_n1, ERRATUM(1275112), ERRATA_N1_1275112
	sysreg_bit_set NEOVERSE_N1_CPUACTLR_EL1, NEOVERSE_N1_CPUACTLR_EL1_BIT_13
	workaround_reset_end neoverse_n1, ERRATUM(1275112)

	check_erratum_ls neoverse_n1, ERRATUM(1275112), CPU_REV(3, 0)

	workaround_reset_start neoverse_n1, ERRATUM(1315703), ERRATA_N1_1315703
	sysreg_bit_set NEOVERSE_N1_CPUACTLR2_EL1, NEOVERSE_N1_CPUACTLR2_EL1_BIT_16
	workaround_reset_end neoverse_n1, ERRATUM(1315703)

	check_erratum_ls neoverse_n1, ERRATUM(1315703), CPU_REV(3, 0)

	workaround_reset_start neoverse_n1, ERRATUM(1542419), ERRATA_N1_1542419
	/* Apply instruction patching sequence */
	ldr x0, =0x0
	msr CPUPSELR_EL3, x0
	ldr x0, =0xEE670D35
	msr CPUPOR_EL3, x0
	ldr x0, =0xFFFF0FFF
	msr CPUPMR_EL3, x0
	ldr x0, =0x08000020007D
	msr CPUPCR_EL3, x0
	isb
	workaround_reset_end neoverse_n1, ERRATUM(1542419)

	check_erratum_range neoverse_n1, ERRATUM(1542419), CPU_REV(3, 0), CPU_REV(4, 0)

	workaround_reset_start neoverse_n1, ERRATUM(1868343), ERRATA_N1_1868343
	sysreg_bit_set NEOVERSE_N1_CPUACTLR_EL1, NEOVERSE_N1_CPUACTLR_EL1_BIT_13
	workaround_reset_end neoverse_n1, ERRATUM(1868343)

	check_erratum_ls neoverse_n1, ERRATUM(1868343), CPU_REV(4, 0)

	workaround_reset_start neoverse_n1, ERRATUM(1946160), ERRATA_N1_1946160
	mov x0, #3
	msr S3_6_C15_C8_0, x0
	ldr x0, =0x10E3900002
	msr S3_6_C15_C8_2, x0
	ldr x0, =0x10FFF00083
	msr S3_6_C15_C8_3, x0
	ldr x0, =0x2001003FF
	msr S3_6_C15_C8_1, x0
	mov x0, #4
	msr S3_6_C15_C8_0, x0
	ldr x0, =0x10E3800082
	msr S3_6_C15_C8_2, x0
	ldr x0, =0x10FFF00083
	msr S3_6_C15_C8_3, x0
	ldr x0, =0x2001003FF
	msr S3_6_C15_C8_1, x0
	mov x0, #5
	msr S3_6_C15_C8_0, x0
	ldr x0, =0x10E3800200
	msr S3_6_C15_C8_2, x0
	ldr x0, =0x10FFF003E0
	msr S3_6_C15_C8_3, x0
	ldr x0, =0x2001003FF
	msr S3_6_C15_C8_1, x0
	isb
	workaround_reset_end neoverse_n1, ERRATUM(1946160)

	check_erratum_range neoverse_n1, ERRATUM(1946160), CPU_REV(3, 0), CPU_REV(4, 1)

	workaround_runtime_start neoverse_n1, ERRATUM(2743102), ERRATA_N1_2743102
	/* dsb before isb of power down sequence */
	dsb sy
	workaround_runtime_end neoverse_n1, ERRATUM(2743102)

	check_erratum_ls neoverse_n1, ERRATUM(2743102), CPU_REV(4, 1)

	workaround_reset_start neoverse_n1, CVE(2022, 23960), WORKAROUND_CVE_2022_23960
	#if IMAGE_BL31
	/*
	* The Neoverse-N1 generic vectors are overridden to apply errata
	* mitigation on exception entry from lower ELs.
	*/
	override_vector_table wa_cve_vbar_neoverse_n1
	#endif /* IMAGE_BL31 */
	workaround_reset_end neoverse_n1, CVE(2022, 23960)

	check_erratum_chosen neoverse_n1, CVE(2022, 23960), WORKAROUND_CVE_2022_23960

	/* --------------------------------------------------
	* Disable speculative loads if Neoverse N1 supports
	* SSBS.
	*
	* Shall clobber: x0.
	* --------------------------------------------------
	*/
	func neoverse_n1_disable_speculative_loads
	/* Check if the PE implements SSBS */
	mrs x0, id_aa64pfr1_el1
	tst x0, #(ID_AA64PFR1_EL1_SSBS_MASK << ID_AA64PFR1_EL1_SSBS_SHIFT)
	b.eq 1f

	/* Disable speculative loads */
	msr SSBS, xzr

	1:
	ret
	endfunc neoverse_n1_disable_speculative_loads

	cpu_reset_func_start neoverse_n1
	bl neoverse_n1_disable_speculative_loads

	/* Forces all cacheable atomic instructions to be near */
	sysreg_bit_set NEOVERSE_N1_CPUACTLR2_EL1, NEOVERSE_N1_CPUACTLR2_EL1_BIT_2
	isb

	#if ENABLE_FEAT_AMU
	/* Make sure accesses from EL0/EL1 and EL2 are not trapped to EL3 */
	sysreg_bit_set actlr_el3, NEOVERSE_N1_ACTLR_AMEN_BIT
	/* Make sure accesses from EL0/EL1 are not trapped to EL2 */
	sysreg_bit_set actlr_el2, NEOVERSE_N1_ACTLR_AMEN_BIT
	/* Enable group0 counters */
	mov x0, #NEOVERSE_N1_AMU_GROUP0_MASK
	msr CPUAMCNTENSET_EL0, x0
	#endif

	#if NEOVERSE_Nx_EXTERNAL_LLC
	/* Some system may have External LLC, core needs to be made aware */
	sysreg_bit_set NEOVERSE_N1_CPUECTLR_EL1, NEOVERSE_N1_CPUECTLR_EL1_EXTLLC_BIT
	#endif
	cpu_reset_func_end neoverse_n1

	/* ---------------------------------------------
	* HW will do the cache maintenance while powering down
	* ---------------------------------------------
	*/
	func neoverse_n1_core_pwr_dwn
	/* ---------------------------------------------
	* Enable CPU power down bit in power control register
	* ---------------------------------------------
	*/
	sysreg_bit_set NEOVERSE_N1_CPUPWRCTLR_EL1, NEOVERSE_N1_CORE_PWRDN_EN_MASK

	apply_erratum neoverse_n1, ERRATUM(2743102), ERRATA_N1_2743102

	isb
	ret
	endfunc neoverse_n1_core_pwr_dwn

	errata_report_shim neoverse_n1

	/*
	* Handle trap of EL0 IC IVAU instructions to EL3 by executing a TLB
	* inner-shareable invalidation to an arbitrary address followed by a DSB.
	*
	* x1: Exception Syndrome
	*/
	func neoverse_n1_errata_ic_trap_handler
	cmp x1, #NEOVERSE_N1_EC_IC_TRAP
	b.ne 1f
	tlbi vae3is, xzr
	dsb sy

	# Skip the IC instruction itself
	mrs x3, elr_el3
	add x3, x3, #4
	msr elr_el3, x3

	ldp x0, x1, [sp, #CTX_GPREGS_OFFSET + CTX_GPREG_X0]
	ldp x2, x3, [sp, #CTX_GPREGS_OFFSET + CTX_GPREG_X2]
	ldp x4, x5, [sp, #CTX_GPREGS_OFFSET + CTX_GPREG_X4]
	ldr x30, [sp, #CTX_GPREGS_OFFSET + CTX_GPREG_LR]

	/*
	* Issue Error Synchronization Barrier to synchronize SErrors before
	* exiting EL3. We're running with EAs unmasked, so any synchronized
	* errors would be taken immediately; therefore no need to inspect
	* DISR_EL1 register.
	*/
	esb
	exception_return
	1:
	ret
	endfunc neoverse_n1_errata_ic_trap_handler

	/* ---------------------------------------------
	* This function provides neoverse_n1 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.neoverse_n1_regs, "aS"
	neoverse_n1_regs: /* The ascii list of register names to be reported */
	.asciz "cpuectlr_el1", ""

	func neoverse_n1_cpu_reg_dump
	adr x6, neoverse_n1_regs
	mrs x8, NEOVERSE_N1_CPUECTLR_EL1
	ret
	endfunc neoverse_n1_cpu_reg_dump

	declare_cpu_ops_eh neoverse_n1, NEOVERSE_N1_MIDR, \
	neoverse_n1_reset_func, \
	neoverse_n1_errata_ic_trap_handler, \
	neoverse_n1_core_pwr_dwn