1/* 2 * Copyright (c) 2024, Arm Limited. All rights reserved. 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> 10#include <cortex_a720_ae.h> 11#include <cpu_macros.S> 12#include <plat_macros.S> 13 14/* Hardware handled coherency */ 15#if HW_ASSISTED_COHERENCY == 0 16#error "Cortex-A720AE must be compiled with HW_ASSISTED_COHERENCY enabled" 17#endif 18 19/* 64-bit only core */ 20#if CTX_INCLUDE_AARCH32_REGS == 1 21#error "Cortex-A720AE supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0" 22#endif 23 24cpu_reset_func_start cortex_a720_ae 25 /* Disable speculative loads */ 26 msr SSBS, xzr 27cpu_reset_func_end cortex_a720_ae 28 29 /* ---------------------------------------------------- 30 * HW will do the cache maintenance while powering down 31 * ---------------------------------------------------- 32 */ 33func cortex_a720_ae_core_pwr_dwn 34 /* --------------------------------------------------- 35 * Enable CPU power down bit in power control register 36 * --------------------------------------------------- 37 */ 38 sysreg_bit_set CORTEX_A720_AE_CPUPWRCTLR_EL1, CORTEX_A720_AE_CPUPWRCTLR_EL1_CORE_PWRDN_BIT 39 40 isb 41 ret 42endfunc cortex_a720_ae_core_pwr_dwn 43 44 /* --------------------------------------------- 45 * This function provides Cortex-A720AE specific 46 * register information for crash reporting. 47 * It needs to return with x6 pointing to 48 * a list of register names in ascii and 49 * x8 - x15 having values of registers to be 50 * reported. 51 * --------------------------------------------- 52 */ 53.section .rodata.cortex_a720_ae_regs, "aS" 54cortex_a720_ae_regs: /* The ascii list of register names to be reported */ 55 .asciz "cpuectlr_el1", "" 56 57func cortex_a720_ae_cpu_reg_dump 58 adr x6, cortex_a720_ae_regs 59 mrs x8, CORTEX_A720_AE_CPUECTLR_EL1 60 ret 61endfunc cortex_a720_ae_cpu_reg_dump 62 63declare_cpu_ops cortex_a720_ae, CORTEX_A720_AE_MIDR, \ 64 cortex_a720_ae_reset_func, \ 65 cortex_a720_ae_core_pwr_dwn 66