Add support for Cortex-A76AE CPU

Change-Id: I0a81f4ea94d41245cd5150de341b51fc70babffe
Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>

docs/user-guide.rst

@@ -1669,6 +1669,8 @@ The FVP models used are Version 11.5 Build 33, unless otherwise stated.
 -  ``FVP_Base_Cortex-A73x4``
 -  ``FVP_Base_Cortex-A75x4``
 -  ``FVP_Base_Cortex-A76x4``
+-  ``FVP_Base_Cortex-A76AEx4`` (Tested with internal model)
+-  ``FVP_Base_Cortex-A76AEx8`` (Tested with internal model)
 -  ``FVP_Base_Neoverse-N1x4`` (Tested with internal model)
 -  ``FVP_Base_Deimos``
 -  ``FVP_CSS_SGI-575`` (Version 11.3 build 42)

include/lib/cpus/aarch64/cortex_a76ae.h

+/*
+ * Copyright (c) 2019, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef CORTEX_A76AE_H
+#define CORTEX_A76AE_H
+
+#include <lib/utils_def.h>
+
+/* Cortex-A76AE MIDR for revision 0 */
+#define CORTEX_A76AE_MIDR		U(0x410FD0E0)
+
+/*******************************************************************************
+ * CPU Extended Control register specific definitions.
+ ******************************************************************************/
+#define CORTEX_A76AE_CPUPWRCTLR_EL1	S3_0_C15_C2_7
+
+/* Definitions of register field mask in CORTEX_A76AE_CPUPWRCTLR_EL1 */
+#define CORTEX_A76AE_CORE_PWRDN_EN_MASK	U(0x1)
+
+#define CORTEX_A76AE_CPUECTLR_EL1	S3_0_C15_C1_4
+
+#endif /* CORTEX_A76AE_H */

lib/cpus/aarch64/cortex_a76ae.S

+/*
+ * Copyright (c) 2019, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <asm_macros.S>
+#include <cortex_a76ae.h>
+#include <cpu_macros.S>
+
+	/* ---------------------------------------------
+	 * HW will do the cache maintenance while powering down
+	 * ---------------------------------------------
+	 */
+func cortex_a76ae_core_pwr_dwn
+	/* ---------------------------------------------
+	 * Enable CPU power down bit in power control register
+	 * ---------------------------------------------
+	 */
+	mrs	x0, CORTEX_A76AE_CPUPWRCTLR_EL1
+	orr	x0, x0, #CORTEX_A76AE_CORE_PWRDN_EN_MASK
+	msr	CORTEX_A76AE_CPUPWRCTLR_EL1, x0
+	isb
+	ret
+endfunc cortex_a76ae_core_pwr_dwn
+
+#if REPORT_ERRATA
+/*
+ * Errata printing function for Cortex-A76AE. Must follow AAPCS.
+ */
+func cortex_a76ae_errata_report
+	ret
+endfunc cortex_a76ae_errata_report
+#endif	/* REPORT_ERRATA */
+
+	/* ---------------------------------------------
+	 * This function provides cortex_a76ae 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_a76ae_regs, "aS"
+cortex_a76ae_regs:  /* The ASCII list of register names to be reported */
+	.asciz	"cpuectlr_el1", ""
+
+func cortex_a76ae_cpu_reg_dump
+	adr	x6, cortex_a76ae_regs
+	mrs	x8, CORTEX_A76AE_CPUECTLR_EL1
+	ret
+endfunc cortex_a76ae_cpu_reg_dump
+
+declare_cpu_ops cortex_a76ae, CORTEX_A76AE_MIDR, CPU_NO_RESET_FUNC, \
+	cortex_a76ae_core_pwr_dwn

plat/arm/board/fvp/platform.mk

@@ -103,6 +103,7 @@ FVP_CPU_LIBS		+=	lib/cpus/aarch64/cortex_a35.S			\
 				lib/cpus/aarch64/cortex_a73.S			\
 				lib/cpus/aarch64/cortex_a75.S			\
 				lib/cpus/aarch64/cortex_a76.S			\
+				lib/cpus/aarch64/cortex_a76ae.S			\
 				lib/cpus/aarch64/neoverse_n1.S			\
 				lib/cpus/aarch64/cortex_deimos.S		\
 				lib/cpus/aarch64/neoverse_zeus.S

readme.rst

@@ -185,6 +185,8 @@ The FVP models used are Version 11.5 Build 33, unless otherwise stated.
 -  ``FVP_Base_Cortex-A73x4``
 -  ``FVP_Base_Cortex-A75x4``
 -  ``FVP_Base_Cortex-A76x4``
+-  ``FVP_Base_Cortex-A76AEx4`` (Tested with internal model)
+-  ``FVP_Base_Cortex-A76AEx8`` (Tested with internal model)
 -  ``FVP_Base_Neoverse-N1x4`` (Tested with internal model)
 -  ``FVP_Base_Deimos``
 -  ``FVP_CSS_SGI-575`` (Version 11.3 build 42)