feat(cpu): add support for Hunter CPU

This patch adds the basic CPU library code to support the Hunter CPU
in TF-A. This CPU is based on the Makalu core so that library code
was adapted as the basis for this patch.

Signed-off-by: John Powell <john.powell@arm.com>
Change-Id: I956b2dc0f43da7cec3e015252392e2694363e1b3

include/lib/cpus/aarch64/cortex_hunter.h

@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2021, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef CORTEX_HUNTER_H
+#define CORTEX_HUNTER_H
+
+#define CORTEX_HUNTER_MIDR					U(0x410FD810)
+
+/*******************************************************************************
+ * CPU Extended Control register specific definitions
+ ******************************************************************************/
+#define CORTEX_HUNTER_CPUECTLR_EL1				S3_0_C15_C1_4
+
+/*******************************************************************************
+ * CPU Power Control register specific definitions
+ ******************************************************************************/
+#define CORTEX_HUNTER_CPUPWRCTLR_EL1				S3_0_C15_C2_7
+#define CORTEX_HUNTER_CPUPWRCTLR_EL1_CORE_PWRDN_BIT		U(1)
+
+#endif /* CORTEX_HUNTER_H */

lib/cpus/aarch64/cortex_hunter.S

@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2021, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch.h>
+#include <asm_macros.S>
+#include <common/bl_common.h>
+#include <cortex_hunter.h>
+#include <cpu_macros.S>
+#include <plat_macros.S>
+
+/* Hardware handled coherency */
+#if HW_ASSISTED_COHERENCY == 0
+#error "Cortex Hunter must be compiled with HW_ASSISTED_COHERENCY enabled"
+#endif
+
+/* 64-bit only core */
+#if CTX_INCLUDE_AARCH32_REGS == 1
+#error "Cortex Hunter supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0"
+#endif
+
+func cortex_hunter_reset_func
+	/* Disable speculative loads */
+	msr	SSBS, xzr
+	isb
+	ret
+endfunc cortex_hunter_reset_func
+
+	/* ----------------------------------------------------
+	 * HW will do the cache maintenance while powering down
+	 * ----------------------------------------------------
+	 */
+func cortex_hunter_core_pwr_dwn
+	/* ---------------------------------------------------
+	 * Enable CPU power down bit in power control register
+	 * ---------------------------------------------------
+	 */
+	mrs	x0, CORTEX_HUNTER_CPUPWRCTLR_EL1
+	orr	x0, x0, #CORTEX_HUNTER_CPUPWRCTLR_EL1_CORE_PWRDN_BIT
+	msr	CORTEX_HUNTER_CPUPWRCTLR_EL1, x0
+	isb
+	ret
+endfunc cortex_hunter_core_pwr_dwn
+
+#if REPORT_ERRATA
+/*
+ * Errata printing function for Cortex Hunter. Must follow AAPCS.
+ */
+func cortex_hunter_errata_report
+	ret
+endfunc cortex_hunter_errata_report
+#endif
+
+	/* ---------------------------------------------
+	 * This function provides Cortex Hunter-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_hunter_regs, "aS"
+cortex_hunter_regs:  /* The ascii list of register names to be reported */
+	.asciz	"cpuectlr_el1", ""
+
+func cortex_hunter_cpu_reg_dump
+	adr	x6, cortex_hunter_regs
+	mrs	x8, CORTEX_HUNTER_CPUECTLR_EL1
+	ret
+endfunc cortex_hunter_cpu_reg_dump
+
+declare_cpu_ops cortex_hunter, CORTEX_HUNTER_MIDR, \
+	cortex_hunter_reset_func, \
+	cortex_hunter_core_pwr_dwn

plat/arm/board/fvp/platform.mk

@@ -139,7 +139,8 @@ else
 					lib/cpus/aarch64/cortex_a65.S		\
 					lib/cpus/aarch64/cortex_a65ae.S		\
 					lib/cpus/aarch64/cortex_a78c.S		\
-					lib/cpus/aarch64/cortex_hayes.S
+					lib/cpus/aarch64/cortex_hayes.S		\
+					lib/cpus/aarch64/cortex_hunter.S
 	endif
 	# AArch64/AArch32 cores
 	FVP_CPU_LIBS	+=	lib/cpus/aarch64/cortex_a55.S		\