From b3e4809554c1c75bf196279f02cb4929fa3c0378 Mon Sep 17 00:00:00 2001
From: Iuliana Prodan <iuliana.prodan@nxp.com>
Date: Mon, 16 Jun 2025 13:12:25 +0300
Subject: [PATCH] lib: open-amp: Add NXP-specific resource table implementation

Implement NXP-specific support for the remote processor
resource table, including custom definitions and initialization
logic to meet NXP's communication requirements.

Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
---
 lib/open-amp/vendor/nxp_resource_table.c | 75 ++++++++++++++++++++++++
 lib/open-amp/vendor/nxp_resource_table.h | 50 ++++++++++++++++
 2 files changed, 125 insertions(+)
 create mode 100644 lib/open-amp/vendor/nxp_resource_table.c
 create mode 100644 lib/open-amp/vendor/nxp_resource_table.h

diff --git a/lib/open-amp/vendor/nxp_resource_table.c b/lib/open-amp/vendor/nxp_resource_table.c
new file mode 100644
index 00000000000..3591e55b9d6
--- /dev/null
+++ b/lib/open-amp/vendor/nxp_resource_table.c
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2025 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/*
+ * NXP resource table
+ *
+ * Remote processors include a "resource table" section in addition
+ * to standard ELF segments.
+ *
+ * The resource table lists system resources needed before powering on,
+ * like contiguous memory allocation or IOMMU mapping.
+ * It also includes entries for supported features and configurations,
+ * such as trace buffers and virtio devices.
+ *
+ * Dependencies:
+ *   Must be linked in the ".resource_table" section to comply with
+ *   Linux kernel OS.
+ *
+ * Related documentation:
+ *   https://www.kernel.org/doc/Documentation/remoteproc.txt
+ *   https://openamp.readthedocs.io/en/latest/protocol_details/lifecyclemgmt.html
+ */
+
+#include "../vendor/nxp_resource_table.h"
+
+#include <zephyr/kernel.h>
+
+#define __resource Z_GENERIC_SECTION(.resource_table)
+
+static struct nxp_resource_table __resource nxp_rsc_table = {
+	.hdr = {
+		.ver = 1,
+		.num = 2,
+	},
+	.offset = {
+		offsetof(struct nxp_resource_table, imx_vs_entry),
+		offsetof(struct nxp_resource_table, vdev),
+	},
+	.imx_vs_entry = {
+		.type = RSC_VENDOR_START,
+		/* length of the resource entry, without type, but including len */
+		.len = 0x10,
+		/* FW_RSC_NXP_S_MAGIC, 'n''x''p''s' */
+		.magic_num = 0x6E787073,
+		.version = 0x0,
+		/* require the host NOT to wait for a FW_READY response */
+		.features = 0x1,
+	},
+	/* 8 is the number of rpmsg buffers used */
+	VDEV_ENTRY_HELPER(8)
+};
+
+void rsc_table_get(void **table_ptr, int *length)
+{
+	*length = sizeof(nxp_rsc_table);
+	*table_ptr = &nxp_rsc_table;
+}
+
+struct fw_rsc_vdev *rsc_table_to_vdev(void *rsc_table)
+{
+	return &((struct nxp_resource_table *)rsc_table)->vdev;
+}
+
+struct fw_rsc_vdev_vring *rsc_table_get_vring0(void *rsc_table)
+{
+	return &((struct nxp_resource_table *)rsc_table)->vring0;
+}
+
+struct fw_rsc_vdev_vring *rsc_table_get_vring1(void *rsc_table)
+{
+	return &((struct nxp_resource_table *)rsc_table)->vring1;
+}
diff --git a/lib/open-amp/vendor/nxp_resource_table.h b/lib/open-amp/vendor/nxp_resource_table.h
new file mode 100644
index 00000000000..e4ed33c2cec
--- /dev/null
+++ b/lib/open-amp/vendor/nxp_resource_table.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2025 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef NXP_RESOURCE_TABLE_H__
+#define NXP_RESOURCE_TABLE_H__
+
+#include <resource_table.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * struct fw_rsc_imx_dsp - i.MX DSP specific info
+ *
+ * @type: type of the resource entry
+ * @len: length of the resource entry, without @type, but including @len field
+ * @magic_num: 32-bit magic number
+ * @version: version of data structure
+ * @features: feature flags supported by the i.MX DSP firmware
+ *
+ * This represents a DSP-specific resource in the firmware's
+ * resource table, providing information on supported features.
+ */
+struct fw_rsc_imx_dsp {
+	uint32_t type;
+	uint32_t len;
+	uint32_t magic_num;
+	uint32_t version;
+	uint32_t features;
+} __packed;
+
+
+struct nxp_resource_table {
+	struct resource_table hdr;
+	uint32_t offset[2];
+	struct fw_rsc_imx_dsp imx_vs_entry;
+	struct fw_rsc_vdev vdev;
+	struct fw_rsc_vdev_vring vring0;
+	struct fw_rsc_vdev_vring vring1;
+} METAL_PACKED_END;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif