ams: Add initial AMS implementation

app/boards/intel_adsp_ace15_mtpm.conf

@@ -37,6 +37,7 @@ CONFIG_INTEL_MODULES=y
 CONFIG_LIBRARY_MANAGER=y
 CONFIG_INTEL_ADSP_TIMER=y
 CONFIG_MM_DRV_INTEL_ADSP_TLB_REMAP_UNUSED_RAM=y
+CONFIG_AMS=y
 
 CONFIG_HEAP_MEM_POOL_SIZE=8192
 CONFIG_L3_HEAP=y

app/boards/intel_adsp_cavs25.conf

@@ -3,6 +3,7 @@ CONFIG_INTEL_DMIC=y
 CONFIG_COMP_CHAIN_DMA=y
 CONFIG_DMIC_HW_IOCLK=38400000
 CONFIG_INTEL_SSP=y
+CONFIG_AMS=y
 CONFIG_INTEL_ALH=y
 CONFIG_LP_MEMORY_BANKS=1
 CONFIG_HP_MEMORY_BANKS=30

src/arch/host/lib/ams.c

@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: BSD-3-Clause
+//
+// Copyright(c) 2023 Intel Corporation. All rights reserved.
+//
+// Author: Krzysztof Frydryk <krzysztofx.frydryk@intel.com>
+
+/**
+ * \file
+ * \brief Xtensa Asynchronous Messaging Service implementation file
+ * \authors Krzysztof Frydryk <krzysztofx.frydryk@intel.com>
+ */
+
+#include <sof/lib/cpu.h>
+#include <sof/lib/ams.h>
+#include <xtos-structs.h>
+
+static struct async_message_service *host_ams;
+
+struct async_message_service **arch_ams_get(void)
+{
+	return &host_ams;
+}

src/arch/xtensa/lib/CMakeLists.txt

@@ -2,6 +2,10 @@
 
 add_local_sources(sof notifier.c)
 
+if (CONFIG_AMS)
+	add_local_sources(sof ams.c)
+endif()
+
 if (CONFIG_MULTICORE)
 	add_local_sources(sof cpu.c)
 endif()

src/arch/xtensa/lib/ams.c

@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: BSD-3-Clause
+//
+// Copyright(c) 2023 Intel Corporation. All rights reserved.
+//
+// Author: Krzysztof Frydryk <krzysztofx.frydryk@intel.com>
+
+/**
+ * \file
+ * \brief Xtensa Asynchronous Messaging Service implementation file
+ * \authors Krzysztof Frydryk <krzysztofx.frydryk@intel.com>
+ */
+
+#include <sof/lib/cpu.h>
+#include <sof/lib/ams.h>
+#include <xtos-structs.h>
+
+struct async_message_service **arch_ams_get(void)
+{
+#if CONFIG_AMS
+	struct core_context *ctx = (struct core_context *)cpu_read_threadptr();
+
+	return &ctx->ams;
+#else
+	return NULL;
+#endif
+}

src/arch/xtensa/xtos/xtos-structs.h

@@ -54,6 +54,9 @@ struct core_context {
 	struct task *main_task;
 	struct schedulers *schedulers;
 	struct notify *notify;
+#ifdef CONFIG_AMS
+	struct async_message_service *ams;
+#endif
 	struct idc *idc;
 };
 

src/idc/idc.c

@@ -32,6 +32,7 @@
 #include <ipc/topology.h>
 #include <errno.h>
 #include <stdint.h>
+#include <sof/lib/ams.h>
 
 LOG_MODULE_REGISTER(idc, CONFIG_SOF_LOG_LEVEL);
 
@@ -274,6 +275,15 @@ static void idc_prepare_d0ix(void)
 	platform_pm_runtime_prepare_d0ix_en(cpu_get_id());
 }
 
+static void idc_process_async_msg(uint32_t slot)
+{
+#if CONFIG_AMS
+	process_incoming_message(slot);
+#else
+	tr_err(&idc_tr, "idc_cmd(): AMS not enabled");
+#endif
+}
+
 /**
  * \brief Handle IDC secondary core crashed message.
  * \param[in] header IDC message header
@@ -335,6 +345,9 @@ void idc_cmd(struct idc_msg *msg)
 	case iTS(IDC_MSG_SECONDARY_CORE_CRASHED):
 		idc_secondary_core_crashed(msg->header);
 		break;
+	case iTS(IDC_MSG_AMS):
+		idc_process_async_msg(IDC_HEADER_TO_AMS_SLOT_MASK(msg->header));
+		break;
 	default:
 		tr_err(&idc_tr, "idc_cmd(): invalid msg->header = %u",
 		       msg->header);