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a00e907696
Adding basic CPU library code to support the Hermes CPU. Change-Id: I61946033fe5fafb56ceb2d14d4c796d85b30457e Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
66 lines
2 KiB
ArmAsm
66 lines
2 KiB
ArmAsm
/*
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* Copyright (c) 2023, Arm Limited. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <arch.h>
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#include <asm_macros.S>
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#include <common/bl_common.h>
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#include <neoverse_hermes.h>
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#include <cpu_macros.S>
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#include <plat_macros.S>
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/* Hardware handled coherency */
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#if HW_ASSISTED_COHERENCY == 0
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#error "Neoverse Hermes must be compiled with HW_ASSISTED_COHERENCY enabled"
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#endif
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/* 64-bit only core */
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#if CTX_INCLUDE_AARCH32_REGS == 1
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#error "Neoverse Hermes supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0"
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#endif
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cpu_reset_func_start neoverse_hermes
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/* Disable speculative loads */
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msr SSBS, xzr
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cpu_reset_func_end neoverse_hermes
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/* ----------------------------------------------------
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* HW will do the cache maintenance while powering down
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* ----------------------------------------------------
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*/
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func neoverse_hermes_core_pwr_dwn
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/* ---------------------------------------------------
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* Enable CPU power down bit in power control register
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* ---------------------------------------------------
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*/
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sysreg_bit_set NEOVERSE_HERMES_CPUPWRCTLR_EL1, NEOVERSE_HERMES_CPUPWRCTLR_EL1_CORE_PWRDN_BIT
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isb
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ret
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endfunc neoverse_hermes_core_pwr_dwn
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errata_report_shim neoverse_hermes
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/* ---------------------------------------------
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* This function provides Neoverse Hermes specific
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* register information for crash reporting.
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* It needs to return with x6 pointing to
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* a list of register names in ascii and
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* x8 - x15 having values of registers to be
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* reported.
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* ---------------------------------------------
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*/
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.section .rodata.neoverse_hermes_regs, "aS"
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neoverse_hermes_regs: /* The ascii list of register names to be reported */
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.asciz "cpuectlr_el1", ""
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func neoverse_hermes_cpu_reg_dump
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adr x6, neoverse_hermes_regs
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mrs x8, NEOVERSE_HERMES_CPUECTLR_EL1
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ret
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endfunc neoverse_hermes_cpu_reg_dump
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declare_cpu_ops neoverse_hermes, NEOVERSE_HERMES_MIDR, \
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neoverse_hermes_reset_func, \
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neoverse_hermes_core_pwr_dwn
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