blob: 0712109bb2ba26cfd5edd13624bb800a8bd38259 [file] [log] [blame]
/*
* 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_a78c.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_a78c must be compiled with HW_ASSISTED_COHERENCY enabled"
#endif
#if WORKAROUND_CVE_2022_23960
wa_cve_2022_23960_bhb_vector_table CORTEX_A78C_BHB_LOOP_COUNT, cortex_a78c
#endif /* WORKAROUND_CVE_2022_23960 */
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
/* -------------------------------------------------
* The CPU Ops reset function for Cortex-A78C
* -------------------------------------------------
*/
func cortex_a78c_reset_func
#if IMAGE_BL31 && WORKAROUND_CVE_2022_23960
/*
* The Cortex-A78c generic vectors are overridden to apply errata
* mitigation on exception entry from lower ELs.
*/
adr x0, wa_cve_vbar_cortex_a78c
msr vbar_el3, x0
#endif /* IMAGE_BL31 && WORKAROUND_CVE_2022_23960 */
isb
ret
endfunc cortex_a78c_reset_func
/* ----------------------------------------------------
* HW will do the cache maintenance while powering down
* ----------------------------------------------------
*/
func cortex_a78c_core_pwr_dwn
/* ---------------------------------------------------
* Enable CPU power down bit in power control register
* ---------------------------------------------------
*/
mrs x0, CORTEX_A78C_CPUPWRCTLR_EL1
orr x0, x0, #CORTEX_A78C_CPUPWRCTLR_EL1_CORE_PWRDN_EN_BIT
msr CORTEX_A78C_CPUPWRCTLR_EL1, x0
isb
ret
endfunc cortex_a78c_core_pwr_dwn
#if REPORT_ERRATA
/*
* Errata printing function for Cortex A78C. Must follow AAPCS.
*/
func cortex_a78c_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 WORKAROUND_CVE_2022_23960, cortex_a78c, cve_2022_23960
ldp x8, x30, [sp], #16
ret
endfunc cortex_a78c_errata_report
#endif
/* ---------------------------------------------
* This function provides cortex_a78c 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_a78c_regs, "aS"
cortex_a78c_regs: /* The ascii list of register names to be reported */
.asciz "cpuectlr_el1", ""
func cortex_a78c_cpu_reg_dump
adr x6, cortex_a78c_regs
mrs x8, CORTEX_A78C_CPUECTLR_EL1
ret
endfunc cortex_a78c_cpu_reg_dump
declare_cpu_ops cortex_a78c, CORTEX_A78C_MIDR, \
cortex_a78c_reset_func, \
cortex_a78c_core_pwr_dwn