| /* |
| * Copyright (c) 2020-2024, 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_runtime_start neoverse_n2, ERRATUM(2340933), ERRATA_N2_2340933 |
| /* Set bit 61 in CPUACTLR5_EL1 */ |
| sysreg_bit_set NEOVERSE_N2_CPUACTLR5_EL1, BIT(61) |
| workaround_runtime_end neoverse_n2, ERRATUM(2340933) |
| |
| check_erratum_ls neoverse_n2, ERRATUM(2340933), CPU_REV(0, 0) |
| |
| workaround_runtime_start neoverse_n2, ERRATUM(2346952), ERRATA_N2_2346952 |
| /* Set TXREQ to STATIC and full L2 TQ size */ |
| mrs x1, NEOVERSE_N2_CPUECTLR2_EL1 |
| mov x0, #CPUECTLR2_EL1_TXREQ_STATIC_FULL |
| bfi x1, x0, #CPUECTLR2_EL1_TXREQ_LSB, #CPUECTLR2_EL1_TXREQ_WIDTH |
| msr NEOVERSE_N2_CPUECTLR2_EL1, x1 |
| workaround_runtime_end neoverse_n2, ERRATUM(2346952) |
| |
| check_erratum_ls neoverse_n2, ERRATUM(2346952), CPU_REV(0, 2) |
| |
| 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_clear cptr_el3, TAM_BIT |
| /* Make sure accesses from EL0/EL1 are not trapped to EL2 */ |
| sysreg_bit_clear 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 |
| |
| /* --------------------------------------------- |
| * 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 |