| Yatharth Kochar | a9f776c | 2016-11-10 16:17:51 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| dp-arm | fa3cf0b | 2017-05-03 09:38:09 +0100 | [diff] [blame] | 4 | * SPDX-License-Identifier: BSD-3-Clause |
| Yatharth Kochar | a9f776c | 2016-11-10 16:17:51 +0000 | [diff] [blame] | 5 | */ |
| 6 | #include <arch.h> |
| 7 | #include <asm_macros.S> |
| 8 | #include <assert_macros.S> |
| 9 | #include <cortex_a57.h> |
| 10 | #include <cpu_macros.S> |
| 11 | #include <debug.h> |
| 12 | |
| 13 | /* --------------------------------------------- |
| 14 | * Disable intra-cluster coherency |
| 15 | * Clobbers: r0-r1 |
| 16 | * --------------------------------------------- |
| 17 | */ |
| 18 | func cortex_a57_disable_smp |
| Varun Wadekar | 1384a16 | 2017-06-05 14:54:46 -0700 | [diff] [blame] | 19 | ldcopr16 r0, r1, CORTEX_A57_ECTLR |
| 20 | bic64_imm r0, r1, CORTEX_A57_ECTLR_SMP_BIT |
| 21 | stcopr16 r0, r1, CORTEX_A57_ECTLR |
| Yatharth Kochar | a9f776c | 2016-11-10 16:17:51 +0000 | [diff] [blame] | 22 | bx lr |
| 23 | endfunc cortex_a57_disable_smp |
| 24 | |
| 25 | /* --------------------------------------------- |
| 26 | * Disable all types of L2 prefetches. |
| 27 | * Clobbers: r0-r2 |
| 28 | * --------------------------------------------- |
| 29 | */ |
| 30 | func cortex_a57_disable_l2_prefetch |
| Varun Wadekar | 1384a16 | 2017-06-05 14:54:46 -0700 | [diff] [blame] | 31 | ldcopr16 r0, r1, CORTEX_A57_ECTLR |
| 32 | orr64_imm r0, r1, CORTEX_A57_ECTLR_DIS_TWD_ACC_PFTCH_BIT |
| 33 | bic64_imm r0, r1, (CORTEX_A57_ECTLR_L2_IPFTCH_DIST_MASK | \ |
| 34 | CORTEX_A57_ECTLR_L2_DPFTCH_DIST_MASK) |
| 35 | stcopr16 r0, r1, CORTEX_A57_ECTLR |
| Yatharth Kochar | a9f776c | 2016-11-10 16:17:51 +0000 | [diff] [blame] | 36 | isb |
| 37 | dsb ish |
| 38 | bx lr |
| 39 | endfunc cortex_a57_disable_l2_prefetch |
| 40 | |
| 41 | /* --------------------------------------------- |
| 42 | * Disable debug interfaces |
| 43 | * --------------------------------------------- |
| 44 | */ |
| 45 | func cortex_a57_disable_ext_debug |
| 46 | mov r0, #1 |
| 47 | stcopr r0, DBGOSDLR |
| 48 | isb |
| 49 | dsb sy |
| 50 | bx lr |
| 51 | endfunc cortex_a57_disable_ext_debug |
| 52 | |
| 53 | /* ------------------------------------------------- |
| 54 | * The CPU Ops reset function for Cortex-A57. |
| 55 | * ------------------------------------------------- |
| 56 | */ |
| 57 | func cortex_a57_reset_func |
| 58 | /* --------------------------------------------- |
| 59 | * Enable the SMP bit. |
| 60 | * --------------------------------------------- |
| 61 | */ |
| Varun Wadekar | 1384a16 | 2017-06-05 14:54:46 -0700 | [diff] [blame] | 62 | ldcopr16 r0, r1, CORTEX_A57_ECTLR |
| 63 | orr64_imm r0, r1, CORTEX_A57_ECTLR_SMP_BIT |
| 64 | stcopr16 r0, r1, CORTEX_A57_ECTLR |
| Yatharth Kochar | a9f776c | 2016-11-10 16:17:51 +0000 | [diff] [blame] | 65 | isb |
| 66 | bx lr |
| 67 | endfunc cortex_a57_reset_func |
| 68 | |
| 69 | /* ---------------------------------------------------- |
| 70 | * The CPU Ops core power down function for Cortex-A57. |
| 71 | * ---------------------------------------------------- |
| 72 | */ |
| 73 | func cortex_a57_core_pwr_dwn |
| 74 | push {r12, lr} |
| 75 | |
| 76 | /* Assert if cache is enabled */ |
| 77 | #if ASM_ASSERTION |
| 78 | ldcopr r0, SCTLR |
| 79 | tst r0, #SCTLR_C_BIT |
| 80 | ASM_ASSERT(eq) |
| 81 | #endif |
| 82 | |
| 83 | /* --------------------------------------------- |
| 84 | * Disable the L2 prefetches. |
| 85 | * --------------------------------------------- |
| 86 | */ |
| 87 | bl cortex_a57_disable_l2_prefetch |
| 88 | |
| 89 | /* --------------------------------------------- |
| 90 | * Flush L1 caches. |
| 91 | * --------------------------------------------- |
| 92 | */ |
| 93 | mov r0, #DC_OP_CISW |
| 94 | bl dcsw_op_level1 |
| 95 | |
| 96 | /* --------------------------------------------- |
| 97 | * Come out of intra cluster coherency |
| 98 | * --------------------------------------------- |
| 99 | */ |
| 100 | bl cortex_a57_disable_smp |
| 101 | |
| 102 | /* --------------------------------------------- |
| 103 | * Force the debug interfaces to be quiescent |
| 104 | * --------------------------------------------- |
| 105 | */ |
| 106 | pop {r12, lr} |
| 107 | b cortex_a57_disable_ext_debug |
| 108 | endfunc cortex_a57_core_pwr_dwn |
| 109 | |
| 110 | /* ------------------------------------------------------- |
| 111 | * The CPU Ops cluster power down function for Cortex-A57. |
| 112 | * Clobbers: r0-r3 |
| 113 | * ------------------------------------------------------- |
| 114 | */ |
| 115 | func cortex_a57_cluster_pwr_dwn |
| 116 | push {r12, lr} |
| 117 | |
| 118 | /* Assert if cache is enabled */ |
| 119 | #if ASM_ASSERTION |
| 120 | ldcopr r0, SCTLR |
| 121 | tst r0, #SCTLR_C_BIT |
| 122 | ASM_ASSERT(eq) |
| 123 | #endif |
| 124 | |
| 125 | /* --------------------------------------------- |
| 126 | * Disable the L2 prefetches. |
| 127 | * --------------------------------------------- |
| 128 | */ |
| 129 | bl cortex_a57_disable_l2_prefetch |
| 130 | |
| 131 | /* --------------------------------------------- |
| 132 | * Flush L1 caches. |
| 133 | * --------------------------------------------- |
| 134 | */ |
| 135 | mov r0, #DC_OP_CISW |
| 136 | bl dcsw_op_level1 |
| 137 | |
| 138 | /* --------------------------------------------- |
| 139 | * Disable the optional ACP. |
| 140 | * --------------------------------------------- |
| 141 | */ |
| 142 | bl plat_disable_acp |
| 143 | |
| 144 | /* --------------------------------------------- |
| 145 | * Flush L2 caches. |
| 146 | * --------------------------------------------- |
| 147 | */ |
| 148 | mov r0, #DC_OP_CISW |
| 149 | bl dcsw_op_level2 |
| 150 | |
| 151 | /* --------------------------------------------- |
| 152 | * Come out of intra cluster coherency |
| 153 | * --------------------------------------------- |
| 154 | */ |
| 155 | bl cortex_a57_disable_smp |
| 156 | |
| 157 | /* --------------------------------------------- |
| 158 | * Force the debug interfaces to be quiescent |
| 159 | * --------------------------------------------- |
| 160 | */ |
| 161 | pop {r12, lr} |
| 162 | b cortex_a57_disable_ext_debug |
| 163 | endfunc cortex_a57_cluster_pwr_dwn |
| 164 | |
| 165 | declare_cpu_ops cortex_a57, CORTEX_A57_MIDR, \ |
| 166 | cortex_a57_reset_func, \ |
| 167 | cortex_a57_core_pwr_dwn, \ |
| 168 | cortex_a57_cluster_pwr_dwn |