shmem.h

Go to the documentation of this file.

/*
 * Copyright 2024 NXP
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef _INCLUDE_ZEPHYR_DRIVERS_FIRMWARE_SCMI_SHMEM_H_
#define _INCLUDE_ZEPHYR_DRIVERS_FIRMWARE_SCMI_SHMEM_H_
 
#include <zephyr/device.h>
#include <zephyr/arch/cpu.h>
#include <errno.h>
 
#define SCMI_SHMEM_CHAN_STATUS_BUSY_BIT BIT(0)
#define SCMI_SHMEM_CHAN_FLAG_IRQ_BIT BIT(0)
 
struct scmi_shmem_layout {
        volatile uint32_t res0;
        volatile uint32_t chan_status;
        volatile uint32_t res1[2];
        volatile uint32_t chan_flags;
        volatile uint32_t len;
        volatile uint32_t msg_hdr;
};
 
struct scmi_message;
 
int scmi_shmem_write_message(const struct device *shmem,
                             struct scmi_message *msg);
 
int scmi_shmem_read_message(const struct device *shmem,
                            struct scmi_message *msg);
 
void scmi_shmem_update_flags(const struct device *shmem,
                             uint32_t mask, uint32_t val);
 
uint32_t scmi_shmem_channel_status(const struct device *shmem);
 
int scmi_shmem_vendor_write_message(struct scmi_shmem_layout *layout);
 
int scmi_shmem_vendor_read_message(const struct scmi_shmem_layout *layout);
 
#endif /* _INCLUDE_ZEPHYR_DRIVERS_FIRMWARE_SCMI_SHMEM_H_ */