| /* |
| * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include <arch.h> |
| #include <asm_macros.S> |
| #include <bl_common.h> |
| #include <cortex_a55.h> |
| #include <cpu_macros.S> |
| #include <plat_macros.S> |
| |
| func cortex_a55_reset_func |
| mov x19, x30 |
| #if ERRATA_DSU_936184 |
| bl errata_dsu_936184_wa |
| #endif |
| ret x19 |
| endfunc cortex_a55_reset_func |
| |
| /* --------------------------------------------- |
| * HW will do the cache maintenance while powering down |
| * --------------------------------------------- |
| */ |
| func cortex_a55_core_pwr_dwn |
| /* --------------------------------------------- |
| * Enable CPU power down bit in power control register |
| * --------------------------------------------- |
| */ |
| mrs x0, CORTEX_A55_CPUPWRCTLR_EL1 |
| orr x0, x0, #CORTEX_A55_CORE_PWRDN_EN_MASK |
| msr CORTEX_A55_CPUPWRCTLR_EL1, x0 |
| isb |
| ret |
| endfunc cortex_a55_core_pwr_dwn |
| |
| #if REPORT_ERRATA |
| /* |
| * Errata printing function for Cortex A55. Must follow AAPCS & can use stack. |
| */ |
| func cortex_a55_errata_report |
| stp x8, x30, [sp, #-16]! |
| bl cpu_get_rev_var |
| mov x8, x0 |
| |
| /* |
| * Report all errata. The revision variant information is at x8, where |
| * "report_errata" is expecting it and it doesn't corrupt it. |
| */ |
| report_errata ERRATA_DSU_936184, cortex_a55, dsu_936184 |
| |
| ldp x8, x30, [sp], #16 |
| ret |
| endfunc cortex_a55_errata_report |
| #endif |
| |
| /* --------------------------------------------- |
| * This function provides cortex_a55 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_a55_regs, "aS" |
| cortex_a55_regs: /* The ascii list of register names to be reported */ |
| .asciz "cpuectlr_el1", "" |
| |
| func cortex_a55_cpu_reg_dump |
| adr x6, cortex_a55_regs |
| mrs x8, CORTEX_A55_CPUECTLR_EL1 |
| ret |
| endfunc cortex_a55_cpu_reg_dump |
| |
| declare_cpu_ops cortex_a55, CORTEX_A55_MIDR, \ |
| cortex_a55_reset_func, \ |
| cortex_a55_core_pwr_dwn |
