Merge "feat(cpu): add support for Cortex-X1" into integration
diff --git a/include/lib/cpus/aarch64/cortex_x1.h b/include/lib/cpus/aarch64/cortex_x1.h
new file mode 100644
index 0000000..7ea7fdd
--- /dev/null
+++ b/include/lib/cpus/aarch64/cortex_x1.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2022, Google LLC. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef CORTEX_X1_H
+#define CORTEX_X1_H
+
+/* Cortex-X1 MIDR for r1p0 */
+#define CORTEX_X1_MIDR U(0x411fd440)
+
+/*******************************************************************************
+ * CPU Extended Control register specific definitions.
+ ******************************************************************************/
+#define CORTEX_X1_CPUECTLR_EL1 S3_0_C15_C1_4
+
+/*******************************************************************************
+ * CPU Power Control register specific definitions
+ ******************************************************************************/
+#define CORTEX_X1_CPUPWRCTLR_EL1 S3_0_C15_C2_7
+#define CORTEX_X1_CORE_PWRDN_EN_MASK U(0x1)
+
+#endif /* CORTEX_X1_H */
diff --git a/lib/cpus/aarch64/cortex_x1.S b/lib/cpus/aarch64/cortex_x1.S
new file mode 100644
index 0000000..3ec0f2d
--- /dev/null
+++ b/lib/cpus/aarch64/cortex_x1.S
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2022, Google LLC. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <asm_macros.S>
+#include <cortex_x1.h>
+#include <cpu_macros.S>
+
+/* Hardware handled coherency */
+#if HW_ASSISTED_COHERENCY == 0
+#error "Cortex-X1 must be compiled with HW_ASSISTED_COHERENCY enabled"
+#endif
+
+/* 64-bit only core */
+#if CTX_INCLUDE_AARCH32_REGS == 1
+#error "Cortex-X1 supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0"
+#endif
+
+func cortex_x1_reset_func
+ ret
+endfunc cortex_x1_reset_func
+
+ /* ---------------------------------------------
+ * HW will do the cache maintenance while powering down
+ * ---------------------------------------------
+ */
+func cortex_x1_core_pwr_dwn
+ /* ---------------------------------------------
+ * Enable CPU power down bit in power control register
+ * ---------------------------------------------
+ */
+ mrs x0, CORTEX_X1_CPUPWRCTLR_EL1
+ orr x0, x0, #CORTEX_X1_CORE_PWRDN_EN_MASK
+ msr CORTEX_X1_CPUPWRCTLR_EL1, x0
+ isb
+ ret
+endfunc cortex_x1_core_pwr_dwn
+
+#if REPORT_ERRATA
+/*
+ * Errata printing function for Cortex X1. Must follow AAPCS.
+ */
+func cortex_x1_errata_report
+ ret
+endfunc cortex_x1_errata_report
+#endif
+
+ /* ---------------------------------------------
+ * This function provides Cortex X1 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_x1_regs, "aS"
+cortex_x1_regs: /* The ascii list of register names to be reported */
+ .asciz "cpuectlr_el1", ""
+
+func cortex_x1_cpu_reg_dump
+ adr x6, cortex_x1_regs
+ mrs x8, CORTEX_X1_CPUECTLR_EL1
+ ret
+endfunc cortex_x1_cpu_reg_dump
+
+declare_cpu_ops cortex_x1, CORTEX_X1_MIDR, \
+ cortex_x1_reset_func, \
+ cortex_x1_core_pwr_dwn