| /* |
| * Copyright (c) 2022-2024, 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_x4.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 X4 must be compiled with HW_ASSISTED_COHERENCY enabled" |
| #endif |
| |
| /* 64-bit only core */ |
| #if CTX_INCLUDE_AARCH32_REGS == 1 |
| #error "Cortex X4 supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0" |
| #endif |
| |
| #if WORKAROUND_CVE_2022_23960 |
| wa_cve_2022_23960_bhb_vector_table CORTEX_X4_BHB_LOOP_COUNT, cortex_x4 |
| #endif /* WORKAROUND_CVE_2022_23960 */ |
| |
| workaround_runtime_start cortex_x4, ERRATUM(2740089), ERRATA_X4_2740089 |
| /* dsb before isb of power down sequence */ |
| dsb sy |
| workaround_runtime_end cortex_x4, ERRATUM(2740089) |
| |
| check_erratum_ls cortex_x4, ERRATUM(2740089), CPU_REV(0, 1) |
| |
| workaround_reset_start cortex_x4, CVE(2022, 23960), WORKAROUND_CVE_2022_23960 |
| #if IMAGE_BL31 |
| /* |
| * The Cortex X4 generic vectors are overridden to apply errata |
| * mitigation on exception entry from lower ELs. |
| */ |
| override_vector_table wa_cve_vbar_cortex_x4 |
| #endif /* IMAGE_BL31 */ |
| workaround_reset_end cortex_x4, CVE(2022, 23960) |
| |
| check_erratum_chosen cortex_x4, CVE(2022, 23960), WORKAROUND_CVE_2022_23960 |
| |
| cpu_reset_func_start cortex_x4 |
| /* Disable speculative loads */ |
| msr SSBS, xzr |
| cpu_reset_func_end cortex_x4 |
| |
| /* ---------------------------------------------------- |
| * HW will do the cache maintenance while powering down |
| * ---------------------------------------------------- |
| */ |
| func cortex_x4_core_pwr_dwn |
| /* --------------------------------------------------- |
| * Enable CPU power down bit in power control register |
| * --------------------------------------------------- |
| */ |
| sysreg_bit_set CORTEX_X4_CPUPWRCTLR_EL1, CORTEX_X4_CPUPWRCTLR_EL1_CORE_PWRDN_BIT |
| |
| apply_erratum cortex_x4, ERRATUM(2740089), ERRATA_X4_2740089 |
| |
| isb |
| ret |
| endfunc cortex_x4_core_pwr_dwn |
| |
| errata_report_shim cortex_x4 |
| |
| /* --------------------------------------------- |
| * This function provides Cortex X4-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_x4_regs, "aS" |
| cortex_x4_regs: /* The ascii list of register names to be reported */ |
| .asciz "cpuectlr_el1", "" |
| |
| func cortex_x4_cpu_reg_dump |
| adr x6, cortex_x4_regs |
| mrs x8, CORTEX_X4_CPUECTLR_EL1 |
| ret |
| endfunc cortex_x4_cpu_reg_dump |
| |
| declare_cpu_ops cortex_x4, CORTEX_X4_MIDR, \ |
| cortex_x4_reset_func, \ |
| cortex_x4_core_pwr_dwn |