johpow01 | cd38ac4 | 2021-03-15 15:07:21 -0500 | [diff] [blame] | 1 | /* |
Bipin Ravi | 32464ba | 2022-05-06 16:02:30 -0500 | [diff] [blame] | 2 | * Copyright (c) 2021-2022, Arm Limited. All rights reserved. |
johpow01 | cd38ac4 | 2021-03-15 15:07:21 -0500 | [diff] [blame] | 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <arch.h> |
| 8 | #include <asm_macros.S> |
| 9 | #include <common/bl_common.h> |
Boyan Karatotev | bdf953c | 2022-10-25 11:29:04 +0100 | [diff] [blame] | 10 | #include <cortex_x3.h> |
johpow01 | cd38ac4 | 2021-03-15 15:07:21 -0500 | [diff] [blame] | 11 | #include <cpu_macros.S> |
| 12 | #include <plat_macros.S> |
Bipin Ravi | 32464ba | 2022-05-06 16:02:30 -0500 | [diff] [blame] | 13 | #include "wa_cve_2022_23960_bhb_vector.S" |
johpow01 | cd38ac4 | 2021-03-15 15:07:21 -0500 | [diff] [blame] | 14 | |
| 15 | /* Hardware handled coherency */ |
| 16 | #if HW_ASSISTED_COHERENCY == 0 |
Boyan Karatotev | bdf953c | 2022-10-25 11:29:04 +0100 | [diff] [blame] | 17 | #error "Cortex-X3 must be compiled with HW_ASSISTED_COHERENCY enabled" |
johpow01 | cd38ac4 | 2021-03-15 15:07:21 -0500 | [diff] [blame] | 18 | #endif |
| 19 | |
| 20 | /* 64-bit only core */ |
| 21 | #if CTX_INCLUDE_AARCH32_REGS == 1 |
Boyan Karatotev | bdf953c | 2022-10-25 11:29:04 +0100 | [diff] [blame] | 22 | #error "Cortex-X3 supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0" |
johpow01 | cd38ac4 | 2021-03-15 15:07:21 -0500 | [diff] [blame] | 23 | #endif |
| 24 | |
Bipin Ravi | 32464ba | 2022-05-06 16:02:30 -0500 | [diff] [blame] | 25 | #if WORKAROUND_CVE_2022_23960 |
Boyan Karatotev | bdf953c | 2022-10-25 11:29:04 +0100 | [diff] [blame] | 26 | wa_cve_2022_23960_bhb_vector_table CORTEX_X3_BHB_LOOP_COUNT, cortex_x3 |
Bipin Ravi | 32464ba | 2022-05-06 16:02:30 -0500 | [diff] [blame] | 27 | #endif /* WORKAROUND_CVE_2022_23960 */ |
| 28 | |
johpow01 | cd38ac4 | 2021-03-15 15:07:21 -0500 | [diff] [blame] | 29 | /* ---------------------------------------------------- |
| 30 | * HW will do the cache maintenance while powering down |
| 31 | * ---------------------------------------------------- |
| 32 | */ |
Boyan Karatotev | bdf953c | 2022-10-25 11:29:04 +0100 | [diff] [blame] | 33 | func cortex_x3_core_pwr_dwn |
Boyan Karatotev | 6559dbd | 2022-10-03 14:18:28 +0100 | [diff] [blame] | 34 | #if ERRATA_X3_2313909 |
| 35 | mov x15, x30 |
| 36 | bl cpu_get_rev_var |
| 37 | bl errata_cortex_x3_2313909_wa |
| 38 | mov x30, x15 |
| 39 | #endif /* ERRATA_X3_2313909 */ |
| 40 | |
johpow01 | cd38ac4 | 2021-03-15 15:07:21 -0500 | [diff] [blame] | 41 | /* --------------------------------------------------- |
| 42 | * Enable CPU power down bit in power control register |
| 43 | * --------------------------------------------------- |
| 44 | */ |
Boyan Karatotev | bdf953c | 2022-10-25 11:29:04 +0100 | [diff] [blame] | 45 | mrs x0, CORTEX_X3_CPUPWRCTLR_EL1 |
| 46 | orr x0, x0, #CORTEX_X3_CPUPWRCTLR_EL1_CORE_PWRDN_BIT |
| 47 | msr CORTEX_X3_CPUPWRCTLR_EL1, x0 |
johpow01 | cd38ac4 | 2021-03-15 15:07:21 -0500 | [diff] [blame] | 48 | isb |
| 49 | ret |
Boyan Karatotev | bdf953c | 2022-10-25 11:29:04 +0100 | [diff] [blame] | 50 | endfunc cortex_x3_core_pwr_dwn |
johpow01 | cd38ac4 | 2021-03-15 15:07:21 -0500 | [diff] [blame] | 51 | |
Bipin Ravi | 32464ba | 2022-05-06 16:02:30 -0500 | [diff] [blame] | 52 | func check_errata_cve_2022_23960 |
| 53 | #if WORKAROUND_CVE_2022_23960 |
| 54 | mov x0, #ERRATA_APPLIES |
| 55 | #else |
| 56 | mov x0, #ERRATA_MISSING |
johpow01 | cd38ac4 | 2021-03-15 15:07:21 -0500 | [diff] [blame] | 57 | #endif |
Bipin Ravi | 32464ba | 2022-05-06 16:02:30 -0500 | [diff] [blame] | 58 | ret |
| 59 | endfunc check_errata_cve_2022_23960 |
johpow01 | cd38ac4 | 2021-03-15 15:07:21 -0500 | [diff] [blame] | 60 | |
Boyan Karatotev | bdf953c | 2022-10-25 11:29:04 +0100 | [diff] [blame] | 61 | func cortex_x3_reset_func |
Harrison Mutai | 82dd5ac | 2022-11-11 14:09:55 +0000 | [diff] [blame] | 62 | mov x19, x30 |
johpow01 | cd38ac4 | 2021-03-15 15:07:21 -0500 | [diff] [blame] | 63 | /* Disable speculative loads */ |
| 64 | msr SSBS, xzr |
Bipin Ravi | 32464ba | 2022-05-06 16:02:30 -0500 | [diff] [blame] | 65 | |
| 66 | #if IMAGE_BL31 && WORKAROUND_CVE_2022_23960 |
| 67 | /* |
Boyan Karatotev | bdf953c | 2022-10-25 11:29:04 +0100 | [diff] [blame] | 68 | * The Cortex-X3 generic vectors are overridden to apply |
Bipin Ravi | 32464ba | 2022-05-06 16:02:30 -0500 | [diff] [blame] | 69 | * errata mitigation on exception entry from lower ELs. |
| 70 | */ |
Boyan Karatotev | bdf953c | 2022-10-25 11:29:04 +0100 | [diff] [blame] | 71 | adr x0, wa_cve_vbar_cortex_x3 |
Bipin Ravi | 32464ba | 2022-05-06 16:02:30 -0500 | [diff] [blame] | 72 | msr vbar_el3, x0 |
| 73 | #endif /* IMAGE_BL31 && WORKAROUND_CVE_2022_23960 */ |
| 74 | |
Harrison Mutai | 82dd5ac | 2022-11-11 14:09:55 +0000 | [diff] [blame] | 75 | bl cpu_get_rev_var |
| 76 | |
| 77 | #if ERRATA_X3_2615812 |
| 78 | bl errata_cortex_x3_2615812_wa |
| 79 | #endif /* ERRATA_X3_2615812 */ |
| 80 | |
johpow01 | cd38ac4 | 2021-03-15 15:07:21 -0500 | [diff] [blame] | 81 | isb |
Harrison Mutai | 82dd5ac | 2022-11-11 14:09:55 +0000 | [diff] [blame] | 82 | ret x19 |
Boyan Karatotev | bdf953c | 2022-10-25 11:29:04 +0100 | [diff] [blame] | 83 | endfunc cortex_x3_reset_func |
johpow01 | cd38ac4 | 2021-03-15 15:07:21 -0500 | [diff] [blame] | 84 | |
Boyan Karatotev | 6559dbd | 2022-10-03 14:18:28 +0100 | [diff] [blame] | 85 | /* ---------------------------------------------------------------------- |
| 86 | * Errata Workaround for Cortex-X3 Erratum 2313909 on power down request. |
| 87 | * This applies to revision r0p0 and r1p0 of Cortex-X3. Fixed in r1p1. |
| 88 | * Inputs: |
| 89 | * x0: variant[4:7] and revision[0:3] of current cpu. |
| 90 | * Shall clobber: x0-x1, x17 |
| 91 | * ---------------------------------------------------------------------- |
| 92 | */ |
| 93 | func errata_cortex_x3_2313909_wa |
| 94 | /* Check revision. */ |
| 95 | mov x17, x30 |
| 96 | bl check_errata_2313909 |
| 97 | cbz x0, 1f |
| 98 | |
| 99 | /* Set bit 36 in ACTLR2_EL1 */ |
| 100 | mrs x1, CORTEX_X3_CPUACTLR2_EL1 |
| 101 | orr x1, x1, #CORTEX_X3_CPUACTLR2_EL1_BIT_36 |
| 102 | msr CORTEX_X3_CPUACTLR2_EL1, x1 |
| 103 | 1: |
| 104 | ret x17 |
| 105 | endfunc errata_cortex_x3_2313909_wa |
| 106 | |
| 107 | func check_errata_2313909 |
| 108 | /* Applies to r0p0 and r1p0 */ |
| 109 | mov x1, #0x10 |
| 110 | b cpu_rev_var_ls |
| 111 | endfunc check_errata_2313909 |
| 112 | |
Harrison Mutai | 82dd5ac | 2022-11-11 14:09:55 +0000 | [diff] [blame] | 113 | /* ---------------------------------------------------------------------- |
| 114 | * Errata Workaround for Cortex-X3 Erratum 2615812 on power-on. |
| 115 | * This applies to revision r0p0, r1p0, r1p1 of Cortex-X3. Open. |
| 116 | * Inputs: |
| 117 | * x0: variant[4:7] and revision[0:3] of current cpu. |
| 118 | * Shall clobber: x0-x1, x17 |
| 119 | * ---------------------------------------------------------------------- |
| 120 | */ |
| 121 | func errata_cortex_x3_2615812_wa |
| 122 | /* Check revision. */ |
| 123 | mov x17, x30 |
| 124 | bl check_errata_2615812 |
| 125 | cbz x0, 1f |
| 126 | |
| 127 | /* Disable retention control for WFI and WFE. */ |
| 128 | mrs x0, CORTEX_X3_CPUPWRCTLR_EL1 |
| 129 | bfi x0, xzr, #CORTEX_X3_CPUPWRCTLR_EL1_WFI_RET_CTRL_BITS_SHIFT, #3 |
| 130 | bfi x0, xzr, #CORTEX_X3_CPUPWRCTLR_EL1_WFE_RET_CTRL_BITS_SHIFT, #3 |
| 131 | msr CORTEX_X3_CPUPWRCTLR_EL1, x0 |
| 132 | 1: |
| 133 | ret x17 |
| 134 | endfunc errata_cortex_x3_2615812_wa |
| 135 | |
| 136 | func check_errata_2615812 |
| 137 | /* Applies to r1p1 and below. */ |
| 138 | mov x1, #0x11 |
| 139 | b cpu_rev_var_ls |
| 140 | endfunc check_errata_2615812 |
| 141 | |
Bipin Ravi | 32464ba | 2022-05-06 16:02:30 -0500 | [diff] [blame] | 142 | #if REPORT_ERRATA |
Boyan Karatotev | bdf953c | 2022-10-25 11:29:04 +0100 | [diff] [blame] | 143 | /* |
| 144 | * Errata printing function for Cortex-X3. Must follow AAPCS. |
| 145 | */ |
| 146 | func cortex_x3_errata_report |
Bipin Ravi | 32464ba | 2022-05-06 16:02:30 -0500 | [diff] [blame] | 147 | stp x8, x30, [sp, #-16]! |
| 148 | |
| 149 | bl cpu_get_rev_var |
| 150 | mov x8, x0 |
| 151 | |
| 152 | /* |
| 153 | * Report all errata. The revision-variant information is passed to |
| 154 | * checking functions of each errata. |
| 155 | */ |
Boyan Karatotev | 6559dbd | 2022-10-03 14:18:28 +0100 | [diff] [blame] | 156 | report_errata ERRATA_X3_2313909, cortex_x3, 2313909 |
Harrison Mutai | 82dd5ac | 2022-11-11 14:09:55 +0000 | [diff] [blame] | 157 | report_errata ERRATA_X3_2615812, cortex_x3, 2615812 |
Boyan Karatotev | bdf953c | 2022-10-25 11:29:04 +0100 | [diff] [blame] | 158 | report_errata WORKAROUND_CVE_2022_23960, cortex_x3, cve_2022_23960 |
Bipin Ravi | 32464ba | 2022-05-06 16:02:30 -0500 | [diff] [blame] | 159 | |
| 160 | ldp x8, x30, [sp], #16 |
| 161 | ret |
Boyan Karatotev | bdf953c | 2022-10-25 11:29:04 +0100 | [diff] [blame] | 162 | endfunc cortex_x3_errata_report |
Bipin Ravi | 32464ba | 2022-05-06 16:02:30 -0500 | [diff] [blame] | 163 | #endif |
| 164 | |
johpow01 | cd38ac4 | 2021-03-15 15:07:21 -0500 | [diff] [blame] | 165 | /* --------------------------------------------- |
Boyan Karatotev | bdf953c | 2022-10-25 11:29:04 +0100 | [diff] [blame] | 166 | * This function provides Cortex-X3- |
johpow01 | cd38ac4 | 2021-03-15 15:07:21 -0500 | [diff] [blame] | 167 | * specific register information for crash |
| 168 | * reporting. It needs to return with x6 |
| 169 | * pointing to a list of register names in ascii |
| 170 | * and x8 - x15 having values of registers to be |
| 171 | * reported. |
| 172 | * --------------------------------------------- |
| 173 | */ |
Boyan Karatotev | bdf953c | 2022-10-25 11:29:04 +0100 | [diff] [blame] | 174 | .section .rodata.cortex_x3_regs, "aS" |
| 175 | cortex_x3_regs: /* The ascii list of register names to be reported */ |
johpow01 | cd38ac4 | 2021-03-15 15:07:21 -0500 | [diff] [blame] | 176 | .asciz "cpuectlr_el1", "" |
| 177 | |
Boyan Karatotev | bdf953c | 2022-10-25 11:29:04 +0100 | [diff] [blame] | 178 | func cortex_x3_cpu_reg_dump |
| 179 | adr x6, cortex_x3_regs |
| 180 | mrs x8, CORTEX_X3_CPUECTLR_EL1 |
johpow01 | cd38ac4 | 2021-03-15 15:07:21 -0500 | [diff] [blame] | 181 | ret |
Boyan Karatotev | bdf953c | 2022-10-25 11:29:04 +0100 | [diff] [blame] | 182 | endfunc cortex_x3_cpu_reg_dump |
johpow01 | cd38ac4 | 2021-03-15 15:07:21 -0500 | [diff] [blame] | 183 | |
Boyan Karatotev | bdf953c | 2022-10-25 11:29:04 +0100 | [diff] [blame] | 184 | declare_cpu_ops cortex_x3, CORTEX_X3_MIDR, \ |
| 185 | cortex_x3_reset_func, \ |
| 186 | cortex_x3_core_pwr_dwn |