Add CPULib for Klein Core
Change-Id: I686fd623b8264c85434853a2a26ecd71e9eeac01
Signed-off-by: Jimmy Brisson <jimmy.brisson@arm.com>
diff --git a/include/lib/cpus/aarch64/cortex_klein.h b/include/lib/cpus/aarch64/cortex_klein.h
new file mode 100644
index 0000000..729b3bf
--- /dev/null
+++ b/include/lib/cpus/aarch64/cortex_klein.h
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2020, ARM Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef CORTEX_KLEIN_H
+#define CORTEX_KLEIN_H
+
+#define CORTEX_KLEIN_MIDR U(0x410FD460)
+
+/*******************************************************************************
+ * CPU Extended Control register specific definitions
+ ******************************************************************************/
+#define CORTEX_KLEIN_CPUECTLR_EL1 S3_0_C15_C1_4
+
+/*******************************************************************************
+ * CPU Power Control register specific definitions
+ ******************************************************************************/
+#define CORTEX_KLEIN_CPUPWRCTLR_EL1 S3_0_C15_C2_7
+#define CORTEX_KLEIN_CPUPWRCTLR_EL1_CORE_PWRDN_BIT U(1)
+
+#endif /* CORTEX_KLEIN_H */
diff --git a/lib/cpus/aarch64/cortex_klein.S b/lib/cpus/aarch64/cortex_klein.S
new file mode 100644
index 0000000..d3a8ab4
--- /dev/null
+++ b/lib/cpus/aarch64/cortex_klein.S
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2020, 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_klein.h>
+#include <cpu_macros.S>
+#include <plat_macros.S>
+
+/* Hardware handled coherency */
+#if HW_ASSISTED_COHERENCY == 0
+#error "Cortex Klein must be compiled with HW_ASSISTED_COHERENCY enabled"
+#endif
+
+/* 64-bit only core */
+#if CTX_INCLUDE_AARCH32_REGS == 1
+#error "Cortex Klein supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0"
+#endif
+
+ /* ----------------------------------------------------
+ * HW will do the cache maintenance while powering down
+ * ----------------------------------------------------
+ */
+func cortex_klein_core_pwr_dwn
+ /* ---------------------------------------------------
+ * Enable CPU power down bit in power control register
+ * ---------------------------------------------------
+ */
+ mrs x0, CORTEX_KLEIN_CPUPWRCTLR_EL1
+ orr x0, x0, #CORTEX_KLEIN_CPUPWRCTLR_EL1_CORE_PWRDN_BIT
+ msr CORTEX_KLEIN_CPUPWRCTLR_EL1, x0
+ isb
+ ret
+endfunc cortex_klein_core_pwr_dwn
+
+ /*
+ * Errata printing function for Cortex Klein. Must follow AAPCS.
+ */
+#if REPORT_ERRATA
+func cortex_klein_errata_report
+ ret
+endfunc cortex_klein_errata_report
+#endif
+
+func cortex_klein_reset_func
+ /* Disable speculative loads */
+ msr SSBS, xzr
+ isb
+ ret
+endfunc cortex_klein_reset_func
+
+ /* ---------------------------------------------
+ * This function provides Cortex-Klein 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_klein_regs, "aS"
+cortex_klein_regs: /* The ascii list of register names to be reported */
+ .asciz "cpuectlr_el1", ""
+
+func cortex_klein_cpu_reg_dump
+ adr x6, cortex_klein_regs
+ mrs x8, CORTEX_KLEIN_CPUECTLR_EL1
+ ret
+endfunc cortex_klein_cpu_reg_dump
+
+declare_cpu_ops cortex_klein, CORTEX_KLEIN_MIDR, \
+ cortex_klein_reset_func, \
+ cortex_klein_core_pwr_dwn
diff --git a/plat/arm/board/fvp/platform.mk b/plat/arm/board/fvp/platform.mk
index 6037435..65dc545 100644
--- a/plat/arm/board/fvp/platform.mk
+++ b/plat/arm/board/fvp/platform.mk
@@ -122,6 +122,7 @@
lib/cpus/aarch64/neoverse_zeus.S \
lib/cpus/aarch64/cortex_hercules.S \
lib/cpus/aarch64/cortex_hercules_ae.S \
+ lib/cpus/aarch64/cortex_klein.S \
lib/cpus/aarch64/cortex_a65.S \
lib/cpus/aarch64/cortex_a65ae.S
endif