Okash Khawaja | f5445fd | 2022-04-21 10:59:34 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2022, Google LLC. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <asm_macros.S> |
| 8 | #include <cortex_x1.h> |
| 9 | #include <cpu_macros.S> |
| 10 | |
| 11 | /* Hardware handled coherency */ |
| 12 | #if HW_ASSISTED_COHERENCY == 0 |
| 13 | #error "Cortex-X1 must be compiled with HW_ASSISTED_COHERENCY enabled" |
| 14 | #endif |
| 15 | |
| 16 | /* 64-bit only core */ |
| 17 | #if CTX_INCLUDE_AARCH32_REGS == 1 |
| 18 | #error "Cortex-X1 supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0" |
| 19 | #endif |
| 20 | |
Okash Khawaja | baee390 | 2022-04-21 12:20:21 +0100 | [diff] [blame^] | 21 | /* -------------------------------------------------- |
| 22 | * Errata Workaround for X1 Erratum 1821534. |
| 23 | * This applies to revision r0p0 and r1p0 of X1. |
| 24 | * Inputs: |
| 25 | * x0: variant[4:7] and revision[0:3] of current cpu. |
| 26 | * Shall clobber: x0-x17 |
| 27 | * -------------------------------------------------- |
| 28 | */ |
| 29 | func errata_x1_1821534_wa |
| 30 | /* Compare x0 against revision r1p0 */ |
| 31 | mov x17, x30 |
| 32 | bl check_errata_1821534 |
| 33 | cbz x0, 1f |
| 34 | mrs x1, CORTEX_X1_ACTLR2_EL1 |
| 35 | orr x1, x1, BIT(2) |
| 36 | msr CORTEX_X1_ACTLR2_EL1, x1 |
| 37 | isb |
| 38 | 1: |
| 39 | ret x17 |
| 40 | endfunc errata_x1_1821534_wa |
| 41 | |
| 42 | func check_errata_1821534 |
| 43 | /* Applies to r0p0 and r1p0 */ |
| 44 | mov x1, #0x10 |
| 45 | b cpu_rev_var_ls |
| 46 | endfunc check_errata_1821534 |
| 47 | |
| 48 | /* -------------------------------------------------- |
| 49 | * Errata Workaround for X1 Erratum 1688305. |
| 50 | * This applies to revision r0p0 and r1p0 of X1. |
| 51 | * Inputs: |
| 52 | * x0: variant[4:7] and revision[0:3] of current cpu. |
| 53 | * Shall clobber: x0-x17 |
| 54 | * -------------------------------------------------- |
| 55 | */ |
| 56 | func errata_x1_1688305_wa |
| 57 | /* Compare x0 against revision r1p0 */ |
| 58 | mov x17, x30 |
| 59 | bl check_errata_1688305 |
| 60 | cbz x0, 1f |
| 61 | mrs x0, CORTEX_X1_ACTLR2_EL1 |
| 62 | orr x0, x0, BIT(1) |
| 63 | msr CORTEX_X1_ACTLR2_EL1, x0 |
| 64 | isb |
| 65 | |
| 66 | 1: |
| 67 | ret x17 |
| 68 | endfunc errata_x1_1688305_wa |
| 69 | |
| 70 | func check_errata_1688305 |
| 71 | /* Applies to r0p0 and r1p0 */ |
| 72 | mov x1, #0x10 |
| 73 | b cpu_rev_var_ls |
| 74 | endfunc check_errata_1688305 |
| 75 | |
| 76 | /* -------------------------------------------------- |
| 77 | * Errata Workaround for X1 Erratum 1827429. |
| 78 | * This applies to revision r0p0 and r1p0 of X1. |
| 79 | * Inputs: |
| 80 | * x0: variant[4:7] and revision[0:3] of current cpu. |
| 81 | * Shall clobber: x0-x17 |
| 82 | * -------------------------------------------------- |
| 83 | */ |
| 84 | func errata_x1_1827429_wa |
| 85 | /* Compare x0 against revision r1p0 */ |
| 86 | mov x17, x30 |
| 87 | bl check_errata_1827429 |
| 88 | cbz x0, 1f |
| 89 | mrs x0, CORTEX_X1_CPUECTLR_EL1 |
| 90 | orr x0, x0, BIT(53) |
| 91 | msr CORTEX_X1_CPUECTLR_EL1, x0 |
| 92 | isb |
| 93 | |
| 94 | 1: |
| 95 | ret x17 |
| 96 | endfunc errata_x1_1827429_wa |
| 97 | |
| 98 | func check_errata_1827429 |
| 99 | /* Applies to r0p0 and r1p0 */ |
| 100 | mov x1, #0x10 |
| 101 | b cpu_rev_var_ls |
| 102 | endfunc check_errata_1827429 |
| 103 | |
| 104 | /* ------------------------------------------------- |
| 105 | * The CPU Ops reset function for Cortex-X1. |
| 106 | * Shall clobber: x0-x19 |
| 107 | * ------------------------------------------------- |
| 108 | */ |
Okash Khawaja | f5445fd | 2022-04-21 10:59:34 +0100 | [diff] [blame] | 109 | func cortex_x1_reset_func |
Okash Khawaja | baee390 | 2022-04-21 12:20:21 +0100 | [diff] [blame^] | 110 | mov x19, x30 |
| 111 | bl cpu_get_rev_var |
| 112 | mov x18, x0 |
| 113 | |
| 114 | #if ERRATA_X1_1821534 |
| 115 | mov x0, x18 |
| 116 | bl errata_x1_1821534_wa |
| 117 | #endif |
| 118 | |
| 119 | #if ERRATA_X1_1688305 |
| 120 | mov x0, x18 |
| 121 | bl errata_x1_1688305_wa |
| 122 | #endif |
| 123 | |
| 124 | #if ERRATA_X1_1827429 |
| 125 | mov x0, x18 |
| 126 | bl errata_x1_1827429_wa |
| 127 | #endif |
| 128 | |
| 129 | isb |
| 130 | ret x19 |
Okash Khawaja | f5445fd | 2022-04-21 10:59:34 +0100 | [diff] [blame] | 131 | endfunc cortex_x1_reset_func |
| 132 | |
| 133 | /* --------------------------------------------- |
| 134 | * HW will do the cache maintenance while powering down |
| 135 | * --------------------------------------------- |
| 136 | */ |
| 137 | func cortex_x1_core_pwr_dwn |
| 138 | /* --------------------------------------------- |
| 139 | * Enable CPU power down bit in power control register |
| 140 | * --------------------------------------------- |
| 141 | */ |
| 142 | mrs x0, CORTEX_X1_CPUPWRCTLR_EL1 |
| 143 | orr x0, x0, #CORTEX_X1_CORE_PWRDN_EN_MASK |
| 144 | msr CORTEX_X1_CPUPWRCTLR_EL1, x0 |
| 145 | isb |
| 146 | ret |
| 147 | endfunc cortex_x1_core_pwr_dwn |
| 148 | |
| 149 | #if REPORT_ERRATA |
| 150 | /* |
| 151 | * Errata printing function for Cortex X1. Must follow AAPCS. |
| 152 | */ |
| 153 | func cortex_x1_errata_report |
Okash Khawaja | baee390 | 2022-04-21 12:20:21 +0100 | [diff] [blame^] | 154 | stp x8, x30, [sp, #-16]! |
| 155 | |
| 156 | bl cpu_get_rev_var |
| 157 | mov x8, x0 |
| 158 | |
| 159 | /* |
| 160 | * Report all errata. The revision-variant information is passed to |
| 161 | * checking functions of each errata. |
| 162 | */ |
| 163 | report_errata ERRATA_X1_1821534, cortex_x1, 1821534 |
| 164 | report_errata ERRATA_X1_1688305, cortex_x1, 1688305 |
| 165 | report_errata ERRATA_X1_1827429, cortex_x1, 1827429 |
| 166 | |
| 167 | ldp x8, x30, [sp], #16 |
Okash Khawaja | f5445fd | 2022-04-21 10:59:34 +0100 | [diff] [blame] | 168 | ret |
| 169 | endfunc cortex_x1_errata_report |
| 170 | #endif |
| 171 | |
| 172 | /* --------------------------------------------- |
| 173 | * This function provides Cortex X1 specific |
| 174 | * register information for crash reporting. |
| 175 | * It needs to return with x6 pointing to |
| 176 | * a list of register names in ascii and |
| 177 | * x8 - x15 having values of registers to be |
| 178 | * reported. |
| 179 | * --------------------------------------------- |
| 180 | */ |
| 181 | .section .rodata.cortex_x1_regs, "aS" |
| 182 | cortex_x1_regs: /* The ascii list of register names to be reported */ |
| 183 | .asciz "cpuectlr_el1", "" |
| 184 | |
| 185 | func cortex_x1_cpu_reg_dump |
| 186 | adr x6, cortex_x1_regs |
| 187 | mrs x8, CORTEX_X1_CPUECTLR_EL1 |
| 188 | ret |
| 189 | endfunc cortex_x1_cpu_reg_dump |
| 190 | |
| 191 | declare_cpu_ops cortex_x1, CORTEX_X1_MIDR, \ |
| 192 | cortex_x1_reset_func, \ |
| 193 | cortex_x1_core_pwr_dwn |