| /* |
| * Copyright (c) 2021-2022, Arm Limited. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include <arch.h> |
| #include <asm_macros.S> |
| #include <common/bl_common.h> |
| #include <cortex_x3.h> |
| #include <cpu_macros.S> |
| #include <plat_macros.S> |
| #include "wa_cve_2022_23960_bhb_vector.S" |
| |
| /* Hardware handled coherency */ |
| #if HW_ASSISTED_COHERENCY == 0 |
| #error "Cortex-X3 must be compiled with HW_ASSISTED_COHERENCY enabled" |
| #endif |
| |
| /* 64-bit only core */ |
| #if CTX_INCLUDE_AARCH32_REGS == 1 |
| #error "Cortex-X3 supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0" |
| #endif |
| |
| #if WORKAROUND_CVE_2022_23960 |
| wa_cve_2022_23960_bhb_vector_table CORTEX_X3_BHB_LOOP_COUNT, cortex_x3 |
| #endif /* WORKAROUND_CVE_2022_23960 */ |
| |
| /* ---------------------------------------------------- |
| * HW will do the cache maintenance while powering down |
| * ---------------------------------------------------- |
| */ |
| func cortex_x3_core_pwr_dwn |
| #if ERRATA_X3_2313909 |
| mov x15, x30 |
| bl cpu_get_rev_var |
| bl errata_cortex_x3_2313909_wa |
| mov x30, x15 |
| #endif /* ERRATA_X3_2313909 */ |
| |
| /* --------------------------------------------------- |
| * Enable CPU power down bit in power control register |
| * --------------------------------------------------- |
| */ |
| mrs x0, CORTEX_X3_CPUPWRCTLR_EL1 |
| orr x0, x0, #CORTEX_X3_CPUPWRCTLR_EL1_CORE_PWRDN_BIT |
| msr CORTEX_X3_CPUPWRCTLR_EL1, x0 |
| isb |
| ret |
| endfunc cortex_x3_core_pwr_dwn |
| |
| func check_errata_cve_2022_23960 |
| #if WORKAROUND_CVE_2022_23960 |
| mov x0, #ERRATA_APPLIES |
| #else |
| mov x0, #ERRATA_MISSING |
| #endif |
| ret |
| endfunc check_errata_cve_2022_23960 |
| |
| func cortex_x3_reset_func |
| /* Disable speculative loads */ |
| msr SSBS, xzr |
| |
| #if IMAGE_BL31 && WORKAROUND_CVE_2022_23960 |
| /* |
| * The Cortex-X3 generic vectors are overridden to apply |
| * errata mitigation on exception entry from lower ELs. |
| */ |
| adr x0, wa_cve_vbar_cortex_x3 |
| msr vbar_el3, x0 |
| #endif /* IMAGE_BL31 && WORKAROUND_CVE_2022_23960 */ |
| |
| isb |
| ret |
| endfunc cortex_x3_reset_func |
| |
| /* ---------------------------------------------------------------------- |
| * Errata Workaround for Cortex-X3 Erratum 2313909 on power down request. |
| * This applies to revision r0p0 and r1p0 of Cortex-X3. Fixed in r1p1. |
| * Inputs: |
| * x0: variant[4:7] and revision[0:3] of current cpu. |
| * Shall clobber: x0-x1, x17 |
| * ---------------------------------------------------------------------- |
| */ |
| func errata_cortex_x3_2313909_wa |
| /* Check revision. */ |
| mov x17, x30 |
| bl check_errata_2313909 |
| cbz x0, 1f |
| |
| /* Set bit 36 in ACTLR2_EL1 */ |
| mrs x1, CORTEX_X3_CPUACTLR2_EL1 |
| orr x1, x1, #CORTEX_X3_CPUACTLR2_EL1_BIT_36 |
| msr CORTEX_X3_CPUACTLR2_EL1, x1 |
| 1: |
| ret x17 |
| endfunc errata_cortex_x3_2313909_wa |
| |
| func check_errata_2313909 |
| /* Applies to r0p0 and r1p0 */ |
| mov x1, #0x10 |
| b cpu_rev_var_ls |
| endfunc check_errata_2313909 |
| |
| #if REPORT_ERRATA |
| /* |
| * Errata printing function for Cortex-X3. Must follow AAPCS. |
| */ |
| func cortex_x3_errata_report |
| stp x8, x30, [sp, #-16]! |
| |
| bl cpu_get_rev_var |
| mov x8, x0 |
| |
| /* |
| * Report all errata. The revision-variant information is passed to |
| * checking functions of each errata. |
| */ |
| report_errata ERRATA_X3_2313909, cortex_x3, 2313909 |
| report_errata WORKAROUND_CVE_2022_23960, cortex_x3, cve_2022_23960 |
| |
| ldp x8, x30, [sp], #16 |
| ret |
| endfunc cortex_x3_errata_report |
| #endif |
| |
| /* --------------------------------------------- |
| * This function provides Cortex-X3- |
| * 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.cortex_x3_regs, "aS" |
| cortex_x3_regs: /* The ascii list of register names to be reported */ |
| .asciz "cpuectlr_el1", "" |
| |
| func cortex_x3_cpu_reg_dump |
| adr x6, cortex_x3_regs |
| mrs x8, CORTEX_X3_CPUECTLR_EL1 |
| ret |
| endfunc cortex_x3_cpu_reg_dump |
| |
| declare_cpu_ops cortex_x3, CORTEX_X3_MIDR, \ |
| cortex_x3_reset_func, \ |
| cortex_x3_core_pwr_dwn |