b0ec7a63ab
This patch implements a service that adds multiendpoint capabilities to RPMsg. Multiple endpoints are intended to be used when multiple modules need services from a remote processor. Each module may register one or more RPMsg endpoints. The implementation separates backend from the service, what allows to extend this module to support other topologies like Linux <-> Zephyr. Co-authored-by: Piotr Szkotak <piotr.szkotak@nordicsemi.no> Signed-off-by: Hubert Miś <hubert.mis@nordicsemi.no>
45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
/*
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* Copyright (c) 2021, Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_SUBSYS_IPC_RPMSG_BACKEND_H
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#define ZEPHYR_SUBSYS_IPC_RPMSG_BACKEND_H
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#include <openamp/rpmsg_virtio.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define VDEV_START_ADDR CONFIG_RPMSG_SERVICE_SHM_BASE_ADDRESS
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#define VDEV_SIZE CONFIG_RPMSG_SERVICE_SHM_SIZE
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#define VDEV_STATUS_ADDR VDEV_START_ADDR
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#define VDEV_STATUS_SIZE 0x400
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#define SHM_START_ADDR (VDEV_START_ADDR + VDEV_STATUS_SIZE)
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#define SHM_SIZE (VDEV_SIZE - VDEV_STATUS_SIZE)
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#define SHM_DEVICE_NAME "sramx.shm"
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/*
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* @brief Initialize RPMsg backend
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*
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* @param io Shared memory IO region. This is an output parameter providing
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* a pointer to an actual shared memory IO region structure.
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* Caller of this function shall pass an address at which the
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* pointer to the shared memory IO region structure is stored.
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* @param vdev Pointer to the virtio device initialized by this function.
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*
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* @retval 0 Initialization successful
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* @retval <0 Initialization error reported by OpenAMP
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*/
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int rpmsg_backend_init(struct metal_io_region **io, struct virtio_device *vdev);
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#ifdef __cplusplus
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}
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#endif
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#endif /* ZEPHYR_SUBSYS_IPC_RPMSG_BACKEND_H */
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