lib/cpus/aarch64/neoverse_n2.S - filogic/atf - Gitiles

 /*
  * Copyright (c) 2020-2023, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */

 #include <arch.h>
 #include <asm_macros.S>
 #include <cpu_macros.S>
 #include <neoverse_n2.h>
 #include "wa_cve_2022_23960_bhb_vector.S"

 /* Hardware handled coherency */
 #if HW_ASSISTED_COHERENCY == 0
 #error "Neoverse N2 must be compiled with HW_ASSISTED_COHERENCY enabled"
 #endif

 /* 64-bit only core */
 #if CTX_INCLUDE_AARCH32_REGS == 1
 #error "Neoverse-N2 supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0"
 #endif

 #if WORKAROUND_CVE_2022_23960
 	wa_cve_2022_23960_bhb_vector_table NEOVERSE_N2_BHB_LOOP_COUNT, neoverse_n2
 #endif /* WORKAROUND_CVE_2022_23960 */

 /*
  * ERRATA_DSU_2313941:
  * The errata is defined in dsu_helpers.S and applies to Neoverse N2.
  * Henceforth creating symbolic names to the already existing errata
  * workaround functions to get them registered under the Errata Framework.
  */
 .equ check_erratum_neoverse_n2_2313941, check_errata_dsu_2313941
 .equ erratum_neoverse_n2_2313941_wa, errata_dsu_2313941_wa
 add_erratum_entry neoverse_n2, ERRATUM(2313941), ERRATA_DSU_2313941, APPLY_AT_RESET

 workaround_reset_start neoverse_n2, ERRATUM(2002655), ERRATA_N2_2002655
 	/* Apply instruction patching sequence */
 	ldr x0,=0x6
 	msr S3_6_c15_c8_0,x0
 	ldr x0,=0xF3A08002
 	msr S3_6_c15_c8_2,x0
 	ldr x0,=0xFFF0F7FE
 	msr S3_6_c15_c8_3,x0
 	ldr x0,=0x40000001003ff
 	msr S3_6_c15_c8_1,x0
 	ldr x0,=0x7
 	msr S3_6_c15_c8_0,x0
 	ldr x0,=0xBF200000
 	msr S3_6_c15_c8_2,x0
 	ldr x0,=0xFFEF0000
 	msr S3_6_c15_c8_3,x0
 	ldr x0,=0x40000001003f3
 	msr S3_6_c15_c8_1,x0
 workaround_reset_end neoverse_n2, ERRATUM(2002655)

 check_erratum_ls neoverse_n2, ERRATUM(2002655), CPU_REV(0, 0)

 workaround_reset_start neoverse_n2, ERRATUM(2025414), ERRATA_N2_2025414
 	sysreg_bit_set NEOVERSE_N2_CPUECTLR_EL1, NEOVERSE_N2_CPUECTLR_EL1_PFSTIDIS_BIT
 workaround_reset_end neoverse_n2, ERRATUM(2025414)

 check_erratum_ls neoverse_n2, ERRATUM(2025414), CPU_REV(0, 0)

 workaround_reset_start neoverse_n2, ERRATUM(2067956), ERRATA_N2_2067956
 	sysreg_bit_set NEOVERSE_N2_CPUACTLR_EL1, NEOVERSE_N2_CPUACTLR_EL1_BIT_46
 workaround_reset_end neoverse_n2, ERRATUM(2067956)

 check_erratum_ls neoverse_n2, ERRATUM(2067956), CPU_REV(0, 0)

 workaround_runtime_start neoverse_n2, ERRATUM(2009478), ERRATA_N2_2009478
 	/* Stash ERRSELR_EL1 in x2 */
 	mrs     x2, ERRSELR_EL1

 	/* Select error record 0 and clear ED bit */
 	msr     ERRSELR_EL1, xzr
 	mrs     x1, ERXCTLR_EL1
 	bfi     x1, xzr, #ERXCTLR_ED_SHIFT, #1
 	msr     ERXCTLR_EL1, x1

 	/* Restore ERRSELR_EL1 from x2 */
 	msr     ERRSELR_EL1, x2
 workaround_runtime_end neoverse_n2, ERRATUM(2009478), NO_ISB

 check_erratum_ls neoverse_n2, ERRATUM(2009478), CPU_REV(0, 0)

 workaround_reset_start neoverse_n2, ERRATUM(2138953), ERRATA_N2_2138953
 	/* Apply instruction patching sequence */
 	mrs	x1, NEOVERSE_N2_CPUECTLR2_EL1
 	mov	x0, #NEOVERSE_N2_CPUECTLR2_EL1_PF_MODE_CNSRV
 	bfi	x1, x0, #CPUECTLR2_EL1_PF_MODE_LSB, #CPUECTLR2_EL1_PF_MODE_WIDTH
 	msr	NEOVERSE_N2_CPUECTLR2_EL1, x1
 workaround_reset_end neoverse_n2, ERRATUM(2138953)

 check_erratum_ls neoverse_n2, ERRATUM(2138953), CPU_REV(0, 3)

 workaround_reset_start neoverse_n2, ERRATUM(2138956), ERRATA_N2_2138956
 	/* Apply instruction patching sequence */
 	ldr	x0,=0x3
 	msr	S3_6_c15_c8_0,x0
 	ldr	x0,=0xF3A08002
 	msr	S3_6_c15_c8_2,x0
 	ldr	x0,=0xFFF0F7FE
 	msr	S3_6_c15_c8_3,x0
 	ldr	x0,=0x10002001003FF
 	msr	S3_6_c15_c8_1,x0
 	ldr	x0,=0x4
 	msr	S3_6_c15_c8_0,x0
 	ldr	x0,=0xBF200000
 	msr	S3_6_c15_c8_2,x0
 	ldr	x0,=0xFFEF0000
 	msr	S3_6_c15_c8_3,x0
 	ldr	x0,=0x10002001003F3
 	msr	S3_6_c15_c8_1,x0
 workaround_reset_end neoverse_n2, ERRATUM(2138956)

 check_erratum_ls neoverse_n2, ERRATUM(2138956), CPU_REV(0, 0)


 workaround_reset_start neoverse_n2, ERRATUM(2138958), ERRATA_N2_2138958
 	/* Apply instruction patching sequence */
 	sysreg_bit_set NEOVERSE_N2_CPUACTLR5_EL1, NEOVERSE_N2_CPUACTLR5_EL1_BIT_13
 workaround_reset_end neoverse_n2, ERRATUM(2138958)

 check_erratum_ls neoverse_n2, ERRATUM(2138958), CPU_REV(0, 0)

 workaround_reset_start neoverse_n2, ERRATUM(2189731), ERRATA_N2_2189731
 	sysreg_bit_set NEOVERSE_N2_CPUACTLR5_EL1, NEOVERSE_N2_CPUACTLR5_EL1_BIT_44
 workaround_reset_end neoverse_n2, ERRATUM(2189731)

 check_erratum_ls neoverse_n2, ERRATUM(2189731), CPU_REV(0, 0)

 workaround_reset_start neoverse_n2, ERRATUM(2242400), ERRATA_N2_2242400
 	/* Apply instruction patching sequence */
 	sysreg_bit_set NEOVERSE_N2_CPUACTLR5_EL1, NEOVERSE_N2_CPUACTLR5_EL1_BIT_17
 	ldr	x0, =0x2
 	msr	S3_6_c15_c8_0, x0
 	ldr	x0, =0x10F600E000
 	msr	S3_6_c15_c8_2, x0
 	ldr	x0, =0x10FF80E000
 	msr	S3_6_c15_c8_3, x0
 	ldr	x0, =0x80000000003FF
 	msr	S3_6_c15_c8_1, x0
 workaround_reset_end neoverse_n2, ERRATUM(2242400)

 check_erratum_ls neoverse_n2, ERRATUM(2242400), CPU_REV(0, 0)

 workaround_reset_start neoverse_n2, ERRATUM(2242415), ERRATA_N2_2242415
 	sysreg_bit_set NEOVERSE_N2_CPUACTLR_EL1, NEOVERSE_N2_CPUACTLR_EL1_BIT_22
 workaround_reset_end neoverse_n2, ERRATUM(2242415)

 check_erratum_ls neoverse_n2, ERRATUM(2242415), CPU_REV(0, 0)

 workaround_reset_start neoverse_n2, ERRATUM(2280757), ERRATA_N2_2280757
 	/* Apply instruction patching sequence */
 	sysreg_bit_set NEOVERSE_N2_CPUACTLR_EL1, NEOVERSE_N2_CPUACTLR_EL1_BIT_22
 workaround_reset_end neoverse_n2, ERRATUM(2280757)

 check_erratum_ls neoverse_n2, ERRATUM(2280757), CPU_REV(0, 0)

 workaround_runtime_start neoverse_n2, ERRATUM(2326639), ERRATA_N2_2326639
 	/* Set bit 36 in ACTLR2_EL1 */
 	sysreg_bit_set NEOVERSE_N2_CPUACTLR2_EL1, NEOVERSE_N2_CPUACTLR2_EL1_BIT_36
 workaround_runtime_end neoverse_n2, ERRATUM(2326639)

 check_erratum_ls neoverse_n2, ERRATUM(2326639), CPU_REV(0, 0)

 workaround_reset_start neoverse_n2, ERRATUM(2376738), ERRATA_N2_2376738
 	/* Set CPUACTLR2_EL1[0] to 1 to force PLDW/PFRM
 	 * ST to behave like PLD/PFRM LD and not cause
 	 * invalidations to other PE caches.
 	 */
 	sysreg_bit_set NEOVERSE_N2_CPUACTLR2_EL1, NEOVERSE_N2_CPUACTLR2_EL1_BIT_0
 workaround_reset_end neoverse_n2, ERRATUM(2376738)

 check_erratum_ls neoverse_n2, ERRATUM(2376738), CPU_REV(0, 3)

 workaround_reset_start neoverse_n2, ERRATUM(2388450), ERRATA_N2_2388450
 	/*Set bit 40 in ACTLR2_EL1 */
 	sysreg_bit_set NEOVERSE_N2_CPUACTLR2_EL1, NEOVERSE_N2_CPUACTLR2_EL1_BIT_40
 workaround_reset_end neoverse_n2, ERRATUM(2388450)

 check_erratum_ls neoverse_n2, ERRATUM(2388450), CPU_REV(0, 0)

 workaround_reset_start neoverse_n2, ERRATUM(2743014), ERRATA_N2_2743014
 	/* Set CPUACTLR5_EL1[56:55] to 2'b01 */
 	sysreg_bit_set NEOVERSE_N2_CPUACTLR5_EL1, NEOVERSE_N2_CPUACTLR5_EL1_BIT_55
 	sysreg_bit_clear NEOVERSE_N2_CPUACTLR5_EL1, NEOVERSE_N2_CPUACTLR5_EL1_BIT_56
 workaround_reset_end neoverse_n2, ERRATUM(2743014)

 check_erratum_ls neoverse_n2, ERRATUM(2743014), CPU_REV(0, 2)

 workaround_runtime_start neoverse_n2, ERRATUM(2743089), ERRATA_N2_2743089
 	/* dsb before isb of power down sequence */
 	dsb	sy
 workaround_runtime_end neoverse_n2, ERRATUM(2743089)

 check_erratum_ls neoverse_n2, ERRATUM(2743089), CPU_REV(0, 2)

 workaround_reset_start neoverse_n2, ERRATUM(2779511), ERRATA_N2_2779511
 	/* Set bit 47 in ACTLR3_EL1 */
 	sysreg_bit_set NEOVERSE_N2_CPUACTLR3_EL1, NEOVERSE_N2_CPUACTLR3_EL1_BIT_47
 workaround_reset_end neoverse_n2, ERRATUM(2779511)

 check_erratum_ls neoverse_n2, ERRATUM(2779511), CPU_REV(0, 2)

 workaround_reset_start neoverse_n2, CVE(2022,23960), WORKAROUND_CVE_2022_23960
 #if IMAGE_BL31
 	/*
 	 * The Neoverse-N2 generic vectors are overridden to apply errata
          * mitigation on exception entry from lower ELs.
 	 */
 	override_vector_table wa_cve_vbar_neoverse_n2
 #endif /* IMAGE_BL31 */
 workaround_reset_end neoverse_n2, CVE(2022,23960)

 check_erratum_chosen neoverse_n2, CVE(2022, 23960), WORKAROUND_CVE_2022_23960

 	/* -------------------------------------------
 	 * The CPU Ops reset function for Neoverse N2.
 	 * -------------------------------------------
 	 */
 cpu_reset_func_start neoverse_n2

 	/* 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:
 	/* Force all cacheable atomic instructions to be near */
 	sysreg_bit_set NEOVERSE_N2_CPUACTLR2_EL1, NEOVERSE_N2_CPUACTLR2_EL1_BIT_2

 #if ENABLE_FEAT_AMU
 	/* Make sure accesses from EL0/EL1 and EL2 are not trapped to EL3 */
 	sysreg_bit_set cptr_el3, TAM_BIT
 	/* Make sure accesses from EL0/EL1 are not trapped to EL2 */
 	sysreg_bit_set cptr_el2, TAM_BIT
 	/* No need to enable the counters as this would be done at el3 exit */
 #endif

 #if NEOVERSE_Nx_EXTERNAL_LLC
 	/* Some systems may have External LLC, core needs to be made aware */
 	sysreg_bit_set NEOVERSE_N2_CPUECTLR_EL1, NEOVERSE_N2_CPUECTLR_EL1_EXTLLC_BIT
 #endif
 cpu_reset_func_end neoverse_n2

 func neoverse_n2_core_pwr_dwn

 	apply_erratum neoverse_n2, ERRATUM(2009478), ERRATA_N2_2009478
 	apply_erratum neoverse_n2, ERRATUM(2326639), ERRATA_N2_2326639, NO_GET_CPU_REV

 	/* ---------------------------------------------------
 	 * Enable CPU power down bit in power control register
 	 * No need to do cache maintenance here.
 	 * ---------------------------------------------------
 	 */
 	sysreg_bit_set NEOVERSE_N2_CPUPWRCTLR_EL1, NEOVERSE_N2_CORE_PWRDN_EN_BIT

 	apply_erratum neoverse_n2, ERRATUM(2743089), ERRATA_N2_2743089

 	isb
 	ret
 endfunc neoverse_n2_core_pwr_dwn

 errata_report_shim neoverse_n2

 	/* ---------------------------------------------
 	 * This function provides Neoverse N2 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_n2_regs, "aS"
 neoverse_n2_regs:  /* The ASCII list of register names to be reported */
 	.asciz	"cpupwrctlr_el1", ""

 func neoverse_n2_cpu_reg_dump
 	adr	x6, neoverse_n2_regs
 	mrs	x8, NEOVERSE_N2_CPUPWRCTLR_EL1
 	ret
 endfunc neoverse_n2_cpu_reg_dump

 declare_cpu_ops neoverse_n2, NEOVERSE_N2_MIDR, \
 	neoverse_n2_reset_func, \
 	neoverse_n2_core_pwr_dwn
	/*
	* Copyright (c) 2020-2023, Arm Limited. All rights reserved.
	*
	* SPDX-License-Identifier: BSD-3-Clause
	*/

	#include <arch.h>
	#include <asm_macros.S>
	#include <cpu_macros.S>
	#include <neoverse_n2.h>
	#include "wa_cve_2022_23960_bhb_vector.S"

	/* Hardware handled coherency */
	#if HW_ASSISTED_COHERENCY == 0
	#error "Neoverse N2 must be compiled with HW_ASSISTED_COHERENCY enabled"
	#endif

	/* 64-bit only core */
	#if CTX_INCLUDE_AARCH32_REGS == 1
	#error "Neoverse-N2 supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0"
	#endif

	#if WORKAROUND_CVE_2022_23960
	wa_cve_2022_23960_bhb_vector_table NEOVERSE_N2_BHB_LOOP_COUNT, neoverse_n2
	#endif /* WORKAROUND_CVE_2022_23960 */

	/*
	* ERRATA_DSU_2313941:
	* The errata is defined in dsu_helpers.S and applies to Neoverse N2.
	* Henceforth creating symbolic names to the already existing errata
	* workaround functions to get them registered under the Errata Framework.
	*/
	.equ check_erratum_neoverse_n2_2313941, check_errata_dsu_2313941
	.equ erratum_neoverse_n2_2313941_wa, errata_dsu_2313941_wa
	add_erratum_entry neoverse_n2, ERRATUM(2313941), ERRATA_DSU_2313941, APPLY_AT_RESET

	workaround_reset_start neoverse_n2, ERRATUM(2002655), ERRATA_N2_2002655
	/* Apply instruction patching sequence */
	ldr x0,=0x6
	msr S3_6_c15_c8_0,x0
	ldr x0,=0xF3A08002
	msr S3_6_c15_c8_2,x0
	ldr x0,=0xFFF0F7FE
	msr S3_6_c15_c8_3,x0
	ldr x0,=0x40000001003ff
	msr S3_6_c15_c8_1,x0
	ldr x0,=0x7
	msr S3_6_c15_c8_0,x0
	ldr x0,=0xBF200000
	msr S3_6_c15_c8_2,x0
	ldr x0,=0xFFEF0000
	msr S3_6_c15_c8_3,x0
	ldr x0,=0x40000001003f3
	msr S3_6_c15_c8_1,x0
	workaround_reset_end neoverse_n2, ERRATUM(2002655)

	check_erratum_ls neoverse_n2, ERRATUM(2002655), CPU_REV(0, 0)

	workaround_reset_start neoverse_n2, ERRATUM(2025414), ERRATA_N2_2025414
	sysreg_bit_set NEOVERSE_N2_CPUECTLR_EL1, NEOVERSE_N2_CPUECTLR_EL1_PFSTIDIS_BIT
	workaround_reset_end neoverse_n2, ERRATUM(2025414)

	check_erratum_ls neoverse_n2, ERRATUM(2025414), CPU_REV(0, 0)

	workaround_reset_start neoverse_n2, ERRATUM(2067956), ERRATA_N2_2067956
	sysreg_bit_set NEOVERSE_N2_CPUACTLR_EL1, NEOVERSE_N2_CPUACTLR_EL1_BIT_46
	workaround_reset_end neoverse_n2, ERRATUM(2067956)

	check_erratum_ls neoverse_n2, ERRATUM(2067956), CPU_REV(0, 0)

	workaround_runtime_start neoverse_n2, ERRATUM(2009478), ERRATA_N2_2009478
	/* Stash ERRSELR_EL1 in x2 */
	mrs x2, ERRSELR_EL1

	/* Select error record 0 and clear ED bit */
	msr ERRSELR_EL1, xzr
	mrs x1, ERXCTLR_EL1
	bfi x1, xzr, #ERXCTLR_ED_SHIFT, #1
	msr ERXCTLR_EL1, x1

	/* Restore ERRSELR_EL1 from x2 */
	msr ERRSELR_EL1, x2
	workaround_runtime_end neoverse_n2, ERRATUM(2009478), NO_ISB

	check_erratum_ls neoverse_n2, ERRATUM(2009478), CPU_REV(0, 0)

	workaround_reset_start neoverse_n2, ERRATUM(2138953), ERRATA_N2_2138953
	/* Apply instruction patching sequence */
	mrs x1, NEOVERSE_N2_CPUECTLR2_EL1
	mov x0, #NEOVERSE_N2_CPUECTLR2_EL1_PF_MODE_CNSRV
	bfi x1, x0, #CPUECTLR2_EL1_PF_MODE_LSB, #CPUECTLR2_EL1_PF_MODE_WIDTH
	msr NEOVERSE_N2_CPUECTLR2_EL1, x1
	workaround_reset_end neoverse_n2, ERRATUM(2138953)

	check_erratum_ls neoverse_n2, ERRATUM(2138953), CPU_REV(0, 3)

	workaround_reset_start neoverse_n2, ERRATUM(2138956), ERRATA_N2_2138956
	/* Apply instruction patching sequence */
	ldr x0,=0x3
	msr S3_6_c15_c8_0,x0
	ldr x0,=0xF3A08002
	msr S3_6_c15_c8_2,x0
	ldr x0,=0xFFF0F7FE
	msr S3_6_c15_c8_3,x0
	ldr x0,=0x10002001003FF
	msr S3_6_c15_c8_1,x0
	ldr x0,=0x4
	msr S3_6_c15_c8_0,x0
	ldr x0,=0xBF200000
	msr S3_6_c15_c8_2,x0
	ldr x0,=0xFFEF0000
	msr S3_6_c15_c8_3,x0
	ldr x0,=0x10002001003F3
	msr S3_6_c15_c8_1,x0
	workaround_reset_end neoverse_n2, ERRATUM(2138956)

	check_erratum_ls neoverse_n2, ERRATUM(2138956), CPU_REV(0, 0)


	workaround_reset_start neoverse_n2, ERRATUM(2138958), ERRATA_N2_2138958
	/* Apply instruction patching sequence */
	sysreg_bit_set NEOVERSE_N2_CPUACTLR5_EL1, NEOVERSE_N2_CPUACTLR5_EL1_BIT_13
	workaround_reset_end neoverse_n2, ERRATUM(2138958)

	check_erratum_ls neoverse_n2, ERRATUM(2138958), CPU_REV(0, 0)

	workaround_reset_start neoverse_n2, ERRATUM(2189731), ERRATA_N2_2189731
	sysreg_bit_set NEOVERSE_N2_CPUACTLR5_EL1, NEOVERSE_N2_CPUACTLR5_EL1_BIT_44
	workaround_reset_end neoverse_n2, ERRATUM(2189731)

	check_erratum_ls neoverse_n2, ERRATUM(2189731), CPU_REV(0, 0)

	workaround_reset_start neoverse_n2, ERRATUM(2242400), ERRATA_N2_2242400
	/* Apply instruction patching sequence */
	sysreg_bit_set NEOVERSE_N2_CPUACTLR5_EL1, NEOVERSE_N2_CPUACTLR5_EL1_BIT_17
	ldr x0, =0x2
	msr S3_6_c15_c8_0, x0
	ldr x0, =0x10F600E000
	msr S3_6_c15_c8_2, x0
	ldr x0, =0x10FF80E000
	msr S3_6_c15_c8_3, x0
	ldr x0, =0x80000000003FF
	msr S3_6_c15_c8_1, x0
	workaround_reset_end neoverse_n2, ERRATUM(2242400)

	check_erratum_ls neoverse_n2, ERRATUM(2242400), CPU_REV(0, 0)

	workaround_reset_start neoverse_n2, ERRATUM(2242415), ERRATA_N2_2242415
	sysreg_bit_set NEOVERSE_N2_CPUACTLR_EL1, NEOVERSE_N2_CPUACTLR_EL1_BIT_22
	workaround_reset_end neoverse_n2, ERRATUM(2242415)

	check_erratum_ls neoverse_n2, ERRATUM(2242415), CPU_REV(0, 0)

	workaround_reset_start neoverse_n2, ERRATUM(2280757), ERRATA_N2_2280757
	/* Apply instruction patching sequence */
	sysreg_bit_set NEOVERSE_N2_CPUACTLR_EL1, NEOVERSE_N2_CPUACTLR_EL1_BIT_22
	workaround_reset_end neoverse_n2, ERRATUM(2280757)

	check_erratum_ls neoverse_n2, ERRATUM(2280757), CPU_REV(0, 0)

	workaround_runtime_start neoverse_n2, ERRATUM(2326639), ERRATA_N2_2326639
	/* Set bit 36 in ACTLR2_EL1 */
	sysreg_bit_set NEOVERSE_N2_CPUACTLR2_EL1, NEOVERSE_N2_CPUACTLR2_EL1_BIT_36
	workaround_runtime_end neoverse_n2, ERRATUM(2326639)

	check_erratum_ls neoverse_n2, ERRATUM(2326639), CPU_REV(0, 0)

	workaround_reset_start neoverse_n2, ERRATUM(2376738), ERRATA_N2_2376738
	/* Set CPUACTLR2_EL1[0] to 1 to force PLDW/PFRM
	* ST to behave like PLD/PFRM LD and not cause
	* invalidations to other PE caches.
	*/
	sysreg_bit_set NEOVERSE_N2_CPUACTLR2_EL1, NEOVERSE_N2_CPUACTLR2_EL1_BIT_0
	workaround_reset_end neoverse_n2, ERRATUM(2376738)

	check_erratum_ls neoverse_n2, ERRATUM(2376738), CPU_REV(0, 3)

	workaround_reset_start neoverse_n2, ERRATUM(2388450), ERRATA_N2_2388450
	/Set bit 40 in ACTLR2_EL1 /
	sysreg_bit_set NEOVERSE_N2_CPUACTLR2_EL1, NEOVERSE_N2_CPUACTLR2_EL1_BIT_40
	workaround_reset_end neoverse_n2, ERRATUM(2388450)

	check_erratum_ls neoverse_n2, ERRATUM(2388450), CPU_REV(0, 0)

	workaround_reset_start neoverse_n2, ERRATUM(2743014), ERRATA_N2_2743014
	/* Set CPUACTLR5_EL1[56:55] to 2'b01 */
	sysreg_bit_set NEOVERSE_N2_CPUACTLR5_EL1, NEOVERSE_N2_CPUACTLR5_EL1_BIT_55
	sysreg_bit_clear NEOVERSE_N2_CPUACTLR5_EL1, NEOVERSE_N2_CPUACTLR5_EL1_BIT_56
	workaround_reset_end neoverse_n2, ERRATUM(2743014)

	check_erratum_ls neoverse_n2, ERRATUM(2743014), CPU_REV(0, 2)

	workaround_runtime_start neoverse_n2, ERRATUM(2743089), ERRATA_N2_2743089
	/* dsb before isb of power down sequence */
	dsb sy
	workaround_runtime_end neoverse_n2, ERRATUM(2743089)

	check_erratum_ls neoverse_n2, ERRATUM(2743089), CPU_REV(0, 2)

	workaround_reset_start neoverse_n2, ERRATUM(2779511), ERRATA_N2_2779511
	/* Set bit 47 in ACTLR3_EL1 */
	sysreg_bit_set NEOVERSE_N2_CPUACTLR3_EL1, NEOVERSE_N2_CPUACTLR3_EL1_BIT_47
	workaround_reset_end neoverse_n2, ERRATUM(2779511)

	check_erratum_ls neoverse_n2, ERRATUM(2779511), CPU_REV(0, 2)

	workaround_reset_start neoverse_n2, CVE(2022,23960), WORKAROUND_CVE_2022_23960
	#if IMAGE_BL31
	/*
	* The Neoverse-N2 generic vectors are overridden to apply errata
	* mitigation on exception entry from lower ELs.
	*/
	override_vector_table wa_cve_vbar_neoverse_n2
	#endif /* IMAGE_BL31 */
	workaround_reset_end neoverse_n2, CVE(2022,23960)

	check_erratum_chosen neoverse_n2, CVE(2022, 23960), WORKAROUND_CVE_2022_23960

	/* -------------------------------------------
	* The CPU Ops reset function for Neoverse N2.
	* -------------------------------------------
	*/
	cpu_reset_func_start neoverse_n2

	/* 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:
	/* Force all cacheable atomic instructions to be near */
	sysreg_bit_set NEOVERSE_N2_CPUACTLR2_EL1, NEOVERSE_N2_CPUACTLR2_EL1_BIT_2

	#if ENABLE_FEAT_AMU
	/* Make sure accesses from EL0/EL1 and EL2 are not trapped to EL3 */
	sysreg_bit_set cptr_el3, TAM_BIT
	/* Make sure accesses from EL0/EL1 are not trapped to EL2 */
	sysreg_bit_set cptr_el2, TAM_BIT
	/* No need to enable the counters as this would be done at el3 exit */
	#endif

	#if NEOVERSE_Nx_EXTERNAL_LLC
	/* Some systems may have External LLC, core needs to be made aware */
	sysreg_bit_set NEOVERSE_N2_CPUECTLR_EL1, NEOVERSE_N2_CPUECTLR_EL1_EXTLLC_BIT
	#endif
	cpu_reset_func_end neoverse_n2

	func neoverse_n2_core_pwr_dwn

	apply_erratum neoverse_n2, ERRATUM(2009478), ERRATA_N2_2009478
	apply_erratum neoverse_n2, ERRATUM(2326639), ERRATA_N2_2326639, NO_GET_CPU_REV

	/* ---------------------------------------------------
	* Enable CPU power down bit in power control register
	* No need to do cache maintenance here.
	* ---------------------------------------------------
	*/
	sysreg_bit_set NEOVERSE_N2_CPUPWRCTLR_EL1, NEOVERSE_N2_CORE_PWRDN_EN_BIT

	apply_erratum neoverse_n2, ERRATUM(2743089), ERRATA_N2_2743089

	isb
	ret
	endfunc neoverse_n2_core_pwr_dwn

	errata_report_shim neoverse_n2

	/* ---------------------------------------------
	* This function provides Neoverse N2 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_n2_regs, "aS"
	neoverse_n2_regs: /* The ASCII list of register names to be reported */
	.asciz "cpupwrctlr_el1", ""

	func neoverse_n2_cpu_reg_dump
	adr x6, neoverse_n2_regs
	mrs x8, NEOVERSE_N2_CPUPWRCTLR_EL1
	ret
	endfunc neoverse_n2_cpu_reg_dump

	declare_cpu_ops neoverse_n2, NEOVERSE_N2_MIDR, \
	neoverse_n2_reset_func, \
	neoverse_n2_core_pwr_dwn