From 6ad216dca5e388f9aa1518a20a81c836c7eb2d21 Mon Sep 17 00:00:00 2001
From: Imre Kis <imre.kis@arm.com>
Date: Thu, 18 Jul 2019 14:30:03 +0200
Subject: [PATCH] Introducing support for Cortex-A65

Change-Id: I645442d52a295706948e2cac88c36c1a3cb0bc47
Signed-off-by: Imre Kis <imre.kis@arm.com>
---
 include/lib/cpus/aarch64/cortex_a65.h | 31 ++++++++++
 lib/cpus/aarch64/cortex_a65.S         | 81 +++++++++++++++++++++++++++
 plat/arm/board/fvp/platform.mk        |  3 +-
 3 files changed, 114 insertions(+), 1 deletion(-)
 create mode 100644 include/lib/cpus/aarch64/cortex_a65.h
 create mode 100644 lib/cpus/aarch64/cortex_a65.S

diff --git a/include/lib/cpus/aarch64/cortex_a65.h b/include/lib/cpus/aarch64/cortex_a65.h
new file mode 100644
index 000000000..0df34c9ce
--- /dev/null
+++ b/include/lib/cpus/aarch64/cortex_a65.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2019, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef CORTEX_A65_H
+#define CORTEX_A65_H
+
+#include <lib/utils_def.h>
+
+#define CORTEX_A65_MIDR			U(0x410FD060)
+
+/*******************************************************************************
+ * CPU Extended Control register specific definitions
+ ******************************************************************************/
+#define CORTEX_A65_ECTLR_EL1		S3_0_C15_C1_4
+
+/*******************************************************************************
+ * CPU Auxiliary Control register specific definitions
+ ******************************************************************************/
+#define CORTEX_A65_CPUACTLR_EL1		S3_0_C15_C1_0
+
+/*******************************************************************************
+ * CPU Power Control register specific definitions
+ ******************************************************************************/
+
+#define CORTEX_A65_CPUPWRCTLR_EL1	S3_0_C15_C2_7
+#define CORTEX_A65_CPUPWRCTLR_EL1_CORE_PWRDN_BIT	(U(1) << 0)
+
+#endif /* CORTEX_A65_H */
diff --git a/lib/cpus/aarch64/cortex_a65.S b/lib/cpus/aarch64/cortex_a65.S
new file mode 100644
index 000000000..666324c1e
--- /dev/null
+++ b/lib/cpus/aarch64/cortex_a65.S
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2019, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#include <arch.h>
+
+#include <asm_macros.S>
+#include <common/bl_common.h>
+#include <common/debug.h>
+#include <cortex_a65.h>
+#include <cpu_macros.S>
+#include <plat_macros.S>
+
+/* Hardware handled coherency */
+#if !HW_ASSISTED_COHERENCY
+#error "Cortex-A65 must be compiled with HW_ASSISTED_COHERENCY enabled"
+#endif
+
+/* 64-bit only core */
+#if CTX_INCLUDE_AARCH32_REGS
+#error "Cortex-A65 supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0"
+#endif
+
+/* -------------------------------------------------
+ * The CPU Ops reset function for Cortex-A65.
+ * Shall clobber: x0-x19
+ * -------------------------------------------------
+ */
+func cortex_a65_reset_func
+	mov	x19, x30
+
+#if ERRATA_DSU_936184
+	bl	errata_dsu_936184_wa
+#endif
+
+	ret	x19
+endfunc cortex_a65_reset_func
+
+func cortex_a65_cpu_pwr_dwn
+	mrs	x0, CORTEX_A65_CPUPWRCTLR_EL1
+	orr	x0, x0, #CORTEX_A65_CPUPWRCTLR_EL1_CORE_PWRDN_BIT
+	msr	CORTEX_A65_CPUPWRCTLR_EL1, x0
+	isb
+	ret
+endfunc cortex_a65_cpu_pwr_dwn
+
+#if REPORT_ERRATA
+/*
+ * Errata printing function for Cortex-A65. Must follow AAPCS.
+ */
+func cortex_a65_errata_report
+	stp	x8, x30, [sp, #-16]!
+
+	bl	cpu_get_rev_var
+	mov	x8, x0
+
+	/*
+	 * Report all errata. The revision-variant information is passed to
+	 * checking functions of each errata.
+	 */
+	report_errata ERRATA_DSU_936184, cortex_a65, dsu_936184
+
+	ldp	x8, x30, [sp], #16
+	ret
+endfunc cortex_a65_errata_report
+#endif
+
+.section .rodata.cortex_a65_regs, "aS"
+cortex_a65_regs:  /* The ascii list of register names to be reported */
+	.asciz	"cpuectlr_el1", ""
+
+func cortex_a65_cpu_reg_dump
+	adr	x6, cortex_a65_regs
+	mrs	x8, CORTEX_A65_ECTLR_EL1
+	ret
+endfunc cortex_a65_cpu_reg_dump
+
+declare_cpu_ops cortex_a65, CORTEX_A65_MIDR, \
+	cortex_a65_reset_func, \
+	cortex_a65_cpu_pwr_dwn
diff --git a/plat/arm/board/fvp/platform.mk b/plat/arm/board/fvp/platform.mk
index 2bba6bd09..c8e2169c3 100644
--- a/plat/arm/board/fvp/platform.mk
+++ b/plat/arm/board/fvp/platform.mk
@@ -116,7 +116,8 @@ else
 					lib/cpus/aarch64/neoverse_e1.S		\
 					lib/cpus/aarch64/neoverse_zeus.S	\
 					lib/cpus/aarch64/cortex_hercules.S	\
-					lib/cpus/aarch64/cortex_hercules_ae.S
+					lib/cpus/aarch64/cortex_hercules_ae.S	\
+					lib/cpus/aarch64/cortex_a65.S
 	endif
 	# AArch64/AArch32 cores
 	FVP_CPU_LIBS	+=	lib/cpus/aarch64/cortex_a55.S		\