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/* ipm_console.c - Console messages to/from another processor */
/*
* Copyright (c) 2015 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef _IPM_CONSOLE_H_
#define _IPM_CONSOLE_H_
#include <kernel.h>
#include <device.h>
#include <ring_buffer.h>
#ifdef __cplusplus
extern "C" {
#endif
#define IPM_CONSOLE_STDOUT (1 << 0)
#define IPM_CONSOLE_PRINTK (1 << 1)
/*
* Good way to determine these numbers other than trial-and-error?
* using printf() in the thread seems to require a lot more stack space
*/
#define IPM_CONSOLE_STACK_SIZE CONFIG_IPM_CONSOLE_STACK_SIZE
#define IPM_CONSOLE_PRI 2
struct ipm_console_receiver_config_info {
/** Name of the low-level IPM driver to bind to */
char *bind_to;
/**
* Stack for the receiver's thread, which prints out messages as
* they come in. Should be sized CONFIG_IPM_CONSOLE_STACK_SIZE
*/
k_thread_stack_t *thread_stack;
/**
* Ring buffer data area for stashing characters from the interrupt
* callback
*/
u32_t *ring_buf_data;
/** Size of ring_buf_data in 32-bit chunks */
unsigned int rb_size32;
/**
* Line buffer for incoming messages, characters accumulate here
* and then are sent to printk() once full (including a trailing NULL)
* or a carriage return seen
*/
char *line_buf;
/** Size in bytes of the line buffer. Must be at least 2 */
unsigned int lb_size;
/**
* Destination for received console messages, one of
* IPM_CONSOLE_STDOUT or IPM_CONSOLE_PRINTK
*/
unsigned int flags;
};
struct ipm_console_receiver_runtime_data {
/** Buffer for received bytes from the low-level IPM device */
struct ring_buf rb;
/** Semaphore to wake up the thread to print out messages */
struct k_sem sem;
/** pointer to the bound low-level IPM device */
struct device *ipm_device;
/** Indicator that the channel is temporarily disabled due to
* full buffer
*/
int channel_disabled;
/** Receiver worker thread */
struct k_thread rx_thread;
};
struct ipm_console_sender_config_info {
/** Name of the low-level driver to bind to */
char *bind_to;
/**
* Source of messages to forward, hooks will be installed.
* Can be IPM_CONSOLE_STDOUT, IPM_CONSOLE_PRINTK, or both
*/
int flags;
};
#if CONFIG_IPM_CONSOLE_RECEIVER
int ipm_console_receiver_init(struct device *d);
#endif
#if CONFIG_IPM_CONSOLE_SENDER
int ipm_console_sender_init(struct device *d);
#endif
#ifdef __cplusplus
}
#endif
#endif /* _IPM_CONSOLE_H_ */