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/*
* 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
/* --------------------------------------------------
* Errata Workaround for Cortex A78C Erratum 2376749.
* This applies to revision r0p1 and r0p2 of the A78C
* and is currently open. It is a Cat B erratum.
* Inputs:
* x0: variant[4:7] and revision[0:3] of current cpu.
* Shall clobber: x0-x4, x17
* --------------------------------------------------
*/
func errata_a78c_2376749_wa
/* Check revision */
mov x17, x30
bl check_errata_2376749
cbz x0, 1f
/* Set CPUACTLR2_EL1[0] to 1. */
mrs x1, CORTEX_A78C_CPUACTLR2_EL1
orr x1, x1, #CORTEX_A78C_CPUACTLR2_EL1_BIT_0
msr CORTEX_A78C_CPUACTLR2_EL1, x1
1:
ret x17
endfunc errata_a78c_2376749_wa
func check_errata_2376749
/* Applies to r0p1 and r0p2*/
mov x1, #0x01
mov x2, #0x02
b cpu_rev_var_range
endfunc check_errata_2376749
/* --------------------------------------------------
* Errata Workaround for Cortex A78C Erratum 2395411.
* This applies to revision r0p1 and r0p2 of the A78C
* and is currently open. It is a Cat B erratum.
* Inputs:
* x0: variant[4:7] and revision[0:3] of current cpu.
* Shall clobber: x0-x4, x17
* --------------------------------------------------
*/
func errata_a78c_2395411_wa
/* Check revision. */
mov x17, x30
bl check_errata_2395411
cbz x0, 1f
/* Set CPUACTRL2_EL1[40] to 1. */
mrs x1, CORTEX_A78C_CPUACTLR2_EL1
orr x1, x1, #CORTEX_A78C_CPUACTLR2_EL1_BIT_40
msr CORTEX_A78C_CPUACTLR2_EL1, x1
1:
ret x17
endfunc errata_a78c_2395411_wa
func check_errata_2395411
/* Applies to r0p1 and r0p2 */
mov x1, #0x01
mov x2, #0x02
b cpu_rev_var_range
endfunc check_errata_2395411
#if WORKAROUND_CVE_2022_23960
wa_cve_2022_23960_bhb_vector_table CORTEX_A78C_BHB_LOOP_COUNT, cortex_a78c
#endif /* WORKAROUND_CVE_2022_23960 */
/* --------------------------------------------------
* Errata Workaround for A78C Erratum 2132064.
* This applies to revisions r0p1 and r0p2 of A78C
* and is still open.
* Inputs:
* x0: variant[4:7] and revision[0:3] of current cpu.
* Shall clobber: x0-x17
* --------------------------------------------------
*/
func errata_a78c_2132064_wa
/* Compare x0 against revisions r0p0 - r0p1 */
mov x17, x30
bl check_errata_2132064
cbz x0, 1f
/* --------------------------------------------------------
* Place the data prefetcher in the most conservative mode
* to reduce prefetches by writing the following bits to
* the value indicated: ecltr[7:6], PF_MODE = 2'b11
* --------------------------------------------------------
*/
mrs x0, CORTEX_A78C_CPUECTLR_EL1
orr x0, x0, #CORTEX_A78C_CPUECTLR_EL1_BIT_6
orr x0, x0, #CORTEX_A78C_CPUECTLR_EL1_BIT_7
msr CORTEX_A78C_CPUECTLR_EL1, x0
isb
1:
ret x17
endfunc errata_a78c_2132064_wa
func check_errata_2132064
/* Applies to revisions r0p1 and r0p2. */
mov x1, #CPU_REV(0, 1)
mov x2, #CPU_REV(0, 2)
b cpu_rev_var_range
endfunc check_errata_2132064
/* --------------------------------------------------------------------
* Errata Workaround for A78C Erratum 2242638.
* This applies to revisions r0p1 and r0p2 of the Cortex A78C
* processor and is still open.
* x0: variant[4:7] and revision[0:3] of current cpu.
* Shall clobber: x0-x17
* --------------------------------------------------------------------
*/
func errata_a78c_2242638_wa
/* Compare x0 against revisions r0p1 - r0p2 */
mov x17, x30
bl check_errata_2242638
cbz x0, 1f
ldr x0, =0x5
msr CORTEX_A78C_IMP_CPUPSELR_EL3, x0
ldr x0, =0x10F600E000
msr CORTEX_A78C_IMP_CPUPOR_EL3, x0
ldr x0, =0x10FF80E000
msr CORTEX_A78C_IMP_CPUPMR_EL3, x0
ldr x0, =0x80000000003FF
msr CORTEX_A78C_IMP_CPUPCR_EL3, x0
isb
1:
ret x17
endfunc errata_a78c_2242638_wa
func check_errata_2242638
/* Applies to revisions r0p1-r0p2. */
mov x1, #CPU_REV(0, 1)
mov x2, #CPU_REV(0, 2)
b cpu_rev_var_range
endfunc check_errata_2242638
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
mov x19, x30
bl cpu_get_rev_var
mov x18, x0
#if ERRATA_A78C_2132064
mov x0, x18
bl errata_a78c_2132064_wa
#endif
#if ERRATA_A78C_2242638
mov x0, x18
bl errata_a78c_2242638_wa
#endif
#if ERRATA_A78C_2376749
mov x0, x18
bl errata_a78c_2376749_wa
#endif
#if ERRATA_A78C_2395411
mov x0, x18
bl errata_a78c_2395411_wa
#endif
#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 x19
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 ERRATA_A78C_2132064, cortex_a78c, 2132064
report_errata ERRATA_A78C_2242638, cortex_a78c, 2242638
report_errata ERRATA_A78C_2376749, cortex_a78c, 2376749
report_errata ERRATA_A78C_2395411, cortex_a78c, 2395411
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
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