/*
* Copyright (c) 2014-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <arch.h>
#include <asm_macros.S>
#include <assert_macros.S>
#include <common/bl_common.h>
#include <common/debug.h>
#include <cortex_a57.h>
#include <cpu_macros.S>
#include <plat_macros.S>
/* ---------------------------------------------
* Disable L1 data cache and unified L2 cache
* ---------------------------------------------
*/
func cortex_a57_disable_dcache
mrs x1, sctlr_el3
bic x1, x1, #SCTLR_C_BIT
msr sctlr_el3, x1
isb
ret
endfunc cortex_a57_disable_dcache
/* ---------------------------------------------
* Disable all types of L2 prefetches.
* ---------------------------------------------
*/
func cortex_a57_disable_l2_prefetch
mrs x0, CORTEX_A57_ECTLR_EL1
orr x0, x0, #CORTEX_A57_ECTLR_DIS_TWD_ACC_PFTCH_BIT
mov x1, #CORTEX_A57_ECTLR_L2_IPFTCH_DIST_MASK
orr x1, x1, #CORTEX_A57_ECTLR_L2_DPFTCH_DIST_MASK
bic x0, x0, x1
msr CORTEX_A57_ECTLR_EL1, x0
isb
dsb ish
ret
endfunc cortex_a57_disable_l2_prefetch
/* ---------------------------------------------
* Disable intra-cluster coherency
* ---------------------------------------------
*/
func cortex_a57_disable_smp
mrs x0, CORTEX_A57_ECTLR_EL1
bic x0, x0, #CORTEX_A57_ECTLR_SMP_BIT
msr CORTEX_A57_ECTLR_EL1, x0
ret
endfunc cortex_a57_disable_smp
/* ---------------------------------------------
* Disable debug interfaces
* ---------------------------------------------
*/
func cortex_a57_disable_ext_debug
mov x0, #1
msr osdlr_el1, x0
isb
dsb sy
ret
endfunc cortex_a57_disable_ext_debug
/* --------------------------------------------------
* Errata Workaround for Cortex A57 Errata #806969.
* This applies only to revision r0p0 of Cortex A57.
* Inputs:
* x0: variant[4:7] and revision[0:3] of current cpu.
* Shall clobber: x0-x17
* --------------------------------------------------
*/
func errata_a57_806969_wa
/*
* Compare x0 against revision r0p0
*/
mov x17, x30
bl check_errata_806969
cbz x0, 1f
mrs x1, CORTEX_A57_CPUACTLR_EL1
orr x1, x1, #CORTEX_A57_CPUACTLR_EL1_NO_ALLOC_WBWA
msr CORTEX_A57_CPUACTLR_EL1, x1
1:
ret x17
endfunc errata_a57_806969_wa
func check_errata_806969
mov x1, #0x00
b cpu_rev_var_ls
endfunc check_errata_806969
/* ---------------------------------------------------
* Errata Workaround for Cortex A57 Errata #813419.
* This applies only to revision r0p0 of Cortex A57.
* ---------------------------------------------------
*/
func check_errata_813419
/*
* Even though this is only needed for revision r0p0, it
* is always applied due to limitations of the current
* errata framework.
*/
mov x0, #ERRATA_APPLIES
ret
endfunc check_errata_813419
/* ---------------------------------------------------
* Errata Workaround for Cortex A57 Errata #813420.
* This applies only to revision r0p0 of Cortex A57.
* Inputs:
* x0: variant[4:7] and revision[0:3] of current cpu.
* Shall clobber: x0-x17
* ---------------------------------------------------
*/
func errata_a57_813420_wa
/*
* Compare x0 against revision r0p0
*/
mov x17, x30
bl check_errata_813420
cbz x0, 1f
mrs x1, CORTEX_A57_CPUACTLR_EL1
orr x1, x1, #CORTEX_A57_CPUACTLR_EL1_DCC_AS_DCCI
msr CORTEX_A57_CPUACTLR_EL1, x1
1:
ret x17
endfunc errata_a57_813420_wa
func check_errata_813420
mov x1, #0x00
b cpu_rev_var_ls
endfunc check_errata_813420
/* --------------------------------------------------------------------
* Disable the over-read from the LDNP instruction.
*
* This applies to all revisions <= r1p2. The performance degradation
* observed with LDNP/STNP has been fixed on r1p3 and onwards.
*
* Inputs:
* x0: variant[4:7] and revision[0:3] of current cpu.
* Shall clobber: x0-x17
* ---------------------------------------------------------------------
*/
func a57_disable_ldnp_overread
/*
* Compare x0 against revision r1p2
*/
mov x17, x30
bl check_errata_disable_ldnp_overread
cbz x0, 1f
mrs x1, CORTEX_A57_CPUACTLR_EL1
orr x1, x1, #CORTEX_A57_CPUACTLR_EL1_DIS_OVERREAD
msr CORTEX_A57_CPUACTLR_EL1, x1
1:
ret x17
endfunc a57_disable_ldnp_overread
func check_errata_disable_ldnp_overread
mov x1, #0x12
b cpu_rev_var_ls
endfunc check_errata_disable_ldnp_overread
/* ---------------------------------------------------
* Errata Workaround for Cortex A57 Errata #826974.
* This applies only to revision <= r1p1 of Cortex A57.
* Inputs:
* x0: variant[4:7] and revision[0:3] of current cpu.
* Shall clobber: x0-x17
* ---------------------------------------------------
*/
func errata_a57_826974_wa
/*
* Compare x0 against revision r1p1
*/
mov x17, x30
bl check_errata_826974
cbz x0, 1f
mrs x1, CORTEX_A57_CPUACTLR_EL1
orr x1, x1, #CORTEX_A57_CPUACTLR_EL1_DIS_LOAD_PASS_DMB
msr CORTEX_A57_CPUACTLR_EL1, x1
1:
ret x17
endfunc errata_a57_826974_wa
func check_errata_826974
mov x1, #0x11
b cpu_rev_var_ls
endfunc check_errata_826974
/* ---------------------------------------------------
* Errata Workaround for Cortex A57 Errata #826977.
* This applies only to revision <= r1p1 of Cortex A57.
* Inputs:
* x0: variant[4:7] and revision[0:3] of current cpu.
* Shall clobber: x0-x17
* ---------------------------------------------------
*/
func errata_a57_826977_wa
/*
* Compare x0 against revision r1p1
*/
mov x17, x30
bl check_errata_826977
cbz x0, 1f
mrs x1, CORTEX_A57_CPUACTLR_EL1
orr x1, x1, #CORTEX_A57_CPUACTLR_EL1_GRE_NGRE_AS_NGNRE
msr CORTEX_A57_CPUACTLR_EL1, x1
1:
ret x17
endfunc errata_a57_826977_wa
func check_errata_826977
mov x1, #0x11
b cpu_rev_var_ls
endfunc check_errata_826977
/* ---------------------------------------------------
* Errata Workaround for Cortex A57 Errata #828024.
* This applies only to revision <= r1p1 of Cortex A57.
* Inputs:
* x0: variant[4:7] and revision[0:3] of current cpu.
* Shall clobber: x0-x17
* ---------------------------------------------------
*/
func errata_a57_828024_wa
/*
* Compare x0 against revision r1p1
*/
mov x17, x30
bl check_errata_828024
cbz x0, 1f
mrs x1, CORTEX_A57_CPUACTLR_EL1
/*
* Setting the relevant bits in CPUACTLR_EL1 has to be done in 2
* instructions here because the resulting bitmask doesn't fit in a
* 16-bit value so it cannot be encoded in a single instruction.
*/
orr x1, x1, #CORTEX_A57_CPUACTLR_EL1_NO_ALLOC_WBWA
orr x1, x1, #(CORTEX_A57_CPUACTLR_EL1_DIS_L1_STREAMING | \
CORTEX_A57_CPUACTLR_EL1_DIS_STREAMING)
msr CORTEX_A57_CPUACTLR_EL1, x1
1:
ret x17
endfunc errata_a57_828024_wa
func check_errata_828024
mov x1, #0x11
b cpu_rev_var_ls
endfunc check_errata_828024
/* ---------------------------------------------------
* Errata Workaround for Cortex A57 Errata #829520.
* This applies only to revision <= r1p2 of Cortex A57.
* Inputs:
* x0: variant[4:7] and revision[0:3] of current cpu.
* Shall clobber: x0-x17
* ---------------------------------------------------
*/
func errata_a57_829520_wa
/*
* Compare x0 against revision r1p2
*/
mov x17, x30
bl check_errata_829520
cbz x0, 1f
mrs x1, CORTEX_A57_CPUACTLR_EL1
orr x1, x1, #CORTEX_A57_CPUACTLR_EL1_DIS_INDIRECT_PREDICTOR
msr CORTEX_A57_CPUACTLR_EL1, x1
1:
ret x17
endfunc errata_a57_829520_wa
func check_errata_829520
mov x1, #0x12
b cpu_rev_var_ls
endfunc check_errata_829520
/* ---------------------------------------------------
* Errata Workaround for Cortex A57 Errata #833471.
* This applies only to revision <= r1p2 of Cortex A57.
* Inputs:
* x0: variant[4:7] and revision[0:3] of current cpu.
* Shall clobber: x0-x17
* ---------------------------------------------------
*/
func errata_a57_833471_wa
/*
* Compare x0 against revision r1p2
*/
mov x17, x30
bl check_errata_833471
cbz x0, 1f
mrs x1, CORTEX_A57_CPUACTLR_EL1
orr x1, x1, #CORTEX_A57_CPUACTLR_EL1_FORCE_FPSCR_FLUSH
msr CORTEX_A57_CPUACTLR_EL1, x1
1:
ret x17
endfunc errata_a57_833471_wa
func check_errata_833471
mov x1, #0x12
b cpu_rev_var_ls
endfunc check_errata_833471
/* --------------------------------------------------
* Errata Workaround for Cortex A57 Errata #859972.
* This applies only to revision <= r1p3 of Cortex A57.
* Inputs:
* x0: variant[4:7] and revision[0:3] of current cpu.
* Shall clobber:
* --------------------------------------------------
*/
func errata_a57_859972_wa
mov x17, x30
bl check_errata_859972
cbz x0, 1f
mrs x1, CORTEX_A57_CPUACTLR_EL1
orr x1, x1, #CORTEX_A57_CPUACTLR_EL1_DIS_INSTR_PREFETCH
msr CORTEX_A57_CPUACTLR_EL1, x1
1:
ret x17
endfunc errata_a57_859972_wa
func check_errata_859972
mov x1, #0x13
b cpu_rev_var_ls
endfunc check_errata_859972
func check_errata_cve_2017_5715
#if WORKAROUND_CVE_2017_5715
mov x0, #ERRATA_APPLIES
#else
mov x0, #ERRATA_MISSING
#endif
ret
endfunc check_errata_cve_2017_5715
func check_errata_cve_2018_3639
#if WORKAROUND_CVE_2018_3639
mov x0, #ERRATA_APPLIES
#else
mov x0, #ERRATA_MISSING
#endif
ret
endfunc check_errata_cve_2018_3639
/* -------------------------------------------------
* The CPU Ops reset function for Cortex-A57.
* Shall clobber: x0-x19
* -------------------------------------------------
*/
func cortex_a57_reset_func
mov x19, x30
bl cpu_get_rev_var
mov x18, x0
#if ERRATA_A57_806969
mov x0, x18
bl errata_a57_806969_wa
#endif
#if ERRATA_A57_813420
mov x0, x18
bl errata_a57_813420_wa
#endif
#if A57_DISABLE_NON_TEMPORAL_HINT
mov x0, x18
bl a57_disable_ldnp_overread
#endif
#if ERRATA_A57_826974
mov x0, x18
bl errata_a57_826974_wa
#endif
#if ERRATA_A57_826977
mov x0, x18
bl errata_a57_826977_wa
#endif
#if ERRATA_A57_828024
mov x0, x18
bl errata_a57_828024_wa
#endif
#if ERRATA_A57_829520
mov x0, x18
bl errata_a57_829520_wa
#endif
#if ERRATA_A57_833471
mov x0, x18
bl errata_a57_833471_wa
#endif
#if ERRATA_A57_859972
mov x0, x18
bl errata_a57_859972_wa
#endif
#if IMAGE_BL31 && WORKAROUND_CVE_2017_5715
adr x0, wa_cve_2017_5715_mmu_vbar
msr vbar_el3, x0
/* isb will be performed before returning from this function */
#endif
#if WORKAROUND_CVE_2018_3639
mrs x0, CORTEX_A57_CPUACTLR_EL1
orr x0, x0, #CORTEX_A57_CPUACTLR_EL1_DIS_LOAD_PASS_STORE
msr CORTEX_A57_CPUACTLR_EL1, x0
isb
dsb sy
#endif
/* ---------------------------------------------
* Enable the SMP bit.
* ---------------------------------------------
*/
mrs x0, CORTEX_A57_ECTLR_EL1
orr x0, x0, #CORTEX_A57_ECTLR_SMP_BIT
msr CORTEX_A57_ECTLR_EL1, x0
isb
ret x19
endfunc cortex_a57_reset_func
/* ----------------------------------------------------
* The CPU Ops core power down function for Cortex-A57.
* ----------------------------------------------------
*/
func cortex_a57_core_pwr_dwn
mov x18, x30
/* ---------------------------------------------
* Turn off caches.
* ---------------------------------------------
*/
bl cortex_a57_disable_dcache
/* ---------------------------------------------
* Disable the L2 prefetches.
* ---------------------------------------------
*/
bl cortex_a57_disable_l2_prefetch
/* ---------------------------------------------
* Flush L1 caches.
* ---------------------------------------------
*/
mov x0, #DCCISW
bl dcsw_op_level1
/* ---------------------------------------------
* Come out of intra cluster coherency
* ---------------------------------------------
*/
bl cortex_a57_disable_smp
/* ---------------------------------------------
* Force the debug interfaces to be quiescent
* ---------------------------------------------
*/
mov x30, x18
b cortex_a57_disable_ext_debug
endfunc cortex_a57_core_pwr_dwn
/* -------------------------------------------------------
* The CPU Ops cluster power down function for Cortex-A57.
* -------------------------------------------------------
*/
func cortex_a57_cluster_pwr_dwn
mov x18, x30
/* ---------------------------------------------
* Turn off caches.
* ---------------------------------------------
*/
bl cortex_a57_disable_dcache
/* ---------------------------------------------
* Disable the L2 prefetches.
* ---------------------------------------------
*/
bl cortex_a57_disable_l2_prefetch
#if !SKIP_A57_L1_FLUSH_PWR_DWN
/* -------------------------------------------------
* Flush the L1 caches.
* -------------------------------------------------
*/
mov x0, #DCCISW
bl dcsw_op_level1
#endif
/* ---------------------------------------------
* Disable the optional ACP.
* ---------------------------------------------
*/
bl plat_disable_acp
/* -------------------------------------------------
* Flush the L2 caches.
* -------------------------------------------------
*/
mov x0, #DCCISW
bl dcsw_op_level2
/* ---------------------------------------------
* Come out of intra cluster coherency
* ---------------------------------------------
*/
bl cortex_a57_disable_smp
/* ---------------------------------------------
* Force the debug interfaces to be quiescent
* ---------------------------------------------
*/
mov x30, x18
b cortex_a57_disable_ext_debug
endfunc cortex_a57_cluster_pwr_dwn
#if REPORT_ERRATA
/*
* Errata printing function for Cortex A57. Must follow AAPCS.
*/
func cortex_a57_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_A57_806969, cortex_a57, 806969
report_errata ERRATA_A57_813419, cortex_a57, 813419
report_errata ERRATA_A57_813420, cortex_a57, 813420
report_errata A57_DISABLE_NON_TEMPORAL_HINT, cortex_a57, \
disable_ldnp_overread
report_errata ERRATA_A57_826974, cortex_a57, 826974
report_errata ERRATA_A57_826977, cortex_a57, 826977
report_errata ERRATA_A57_828024, cortex_a57, 828024
report_errata ERRATA_A57_829520, cortex_a57, 829520
report_errata ERRATA_A57_833471, cortex_a57, 833471
report_errata ERRATA_A57_859972, cortex_a57, 859972
report_errata WORKAROUND_CVE_2017_5715, cortex_a57, cve_2017_5715
report_errata WORKAROUND_CVE_2018_3639, cortex_a57, cve_2018_3639
ldp x8, x30, [sp], #16
ret
endfunc cortex_a57_errata_report
#endif
/* ---------------------------------------------
* This function provides cortex_a57 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_a57_regs, "aS"
cortex_a57_regs: /* The ascii list of register names to be reported */
.asciz "cpuectlr_el1", "cpumerrsr_el1", "l2merrsr_el1", ""
func cortex_a57_cpu_reg_dump
adr x6, cortex_a57_regs
mrs x8, CORTEX_A57_ECTLR_EL1
mrs x9, CORTEX_A57_MERRSR_EL1
mrs x10, CORTEX_A57_L2MERRSR_EL1
ret
endfunc cortex_a57_cpu_reg_dump
declare_cpu_ops_wa cortex_a57, CORTEX_A57_MIDR, \
cortex_a57_reset_func, \
check_errata_cve_2017_5715, \
CPU_NO_EXTRA2_FUNC, \
cortex_a57_core_pwr_dwn, \
cortex_a57_cluster_pwr_dwn
