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+/**
+ * @file rtems/bspIo.h
+ *
+ * @brief Interface to Kernel Print Methods
+ *
+ * This include file defines the interface to kernel print methods.
+ */
+
+/*
+ * COPYRIGHT (c) 1998 valette@crf.canon.fr
+ * COPYRIGHT (c) 2011 On-Line Applications Research Corporation.
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#ifndef _RTEMS_BSPIO_H
+#define _RTEMS_BSPIO_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @defgroup BSPIO Kernel Print Support
+ *
+ * This module contains all methods and support related to providing
+ * kernel level print support.
+ *
+ * The following variables below are declared as extern and
+ * MUST be declared and initialized in each BSP. Using this indirect
+ * function, the functionality in this group is tailored for the BSP.
+ *
+ * - BSP_output_char
+ * - BSP_poll_char
+ */
+
+/**
+ * This type defines the prototype for the BSP provided method to
+ * print a single character. It is assumed to be polled.
+ */
+typedef void (*BSP_output_char_function_type) (char c);
+
+/**
+ * This type defines the prototype for the BSP provided method to
+ * input a single character. It is assumed to be polled.
+ */
+typedef int (*BSP_polling_getchar_function_type) (void);
+
+/**
+ * This variable points to the BSP provided method to output a
+ * character for the purposes of debug output.
+ */
+extern BSP_output_char_function_type BSP_output_char;
+
+/**
+ * This variable points to the BSP provided method to input a
+ * character for the purposes of debug input.
+ */
+extern BSP_polling_getchar_function_type BSP_poll_char;
+
+#include <stdarg.h>
+
+/**
+ * @brief Get Character (kernel I/O)
+ *
+ * This method polls for a key in the simplest possible fashion
+ * from whatever the debug console device is.
+ *
+ * @return If a character is available, it is returned. Otherwise
+ * this method returns -1.
+ *
+ * @note This method uses the BSP_poll_char pointer to a BSP
+ * provided method.
+ */
+extern int getchark(void);
+
+/**
+ * @brief Variable Argument printk()
+ *
+ * This method allows the user to access printk() functionality
+ * with a va_list style argument.
+ *
+ * @param[in] fmt is a printf()-style format string
+ * @param[in] ap is a va_list pointer to arguments
+ */
+extern void vprintk(const char *fmt, va_list ap);
+
+/**
+ * @brief Kernel Print
+ *
+ * This method allows the user to perform a debug printk().
+ *
+ * @param[in] fmt is a printf()-style format string
+ */
+extern void printk(const char *fmt, ...);
+
+/**
+ * @brief Kernel Put String
+ *
+ * This method allows the user to perform a debug puts().
+ *
+ * @param[in] s is the string to print
+ */
+extern void putk(const char *s);
+
+/**
+ * @brief Kernel Put Character
+ *
+ * This method allows the user to perform a debug putc().
+ *
+ * @param[in] c is the character to print
+ */
+extern void rtems_putc(char c);
+
+/**
+ * Type definition for function which can be plugged in to
+ * certain reporting routines to redirect the output.
+ *
+ * Methods following this prototype may be passed into RTEMS reporting
+ * functions that allow their output to be redirected. In particular,
+ * the cpu usage, period usage, and stack usage reporting
+ * functions use this.
+ *
+ * If the user provides their own "printf plugin", then they may
+ * redirect those reports as they see fit.
+ */
+typedef int (*rtems_printk_plugin_t)(void *, const char *format, ...);
+
+/**
+ * @brief Reporting Methods printk() Plugin
+ *
+ * @param[in] context points to a user defined context.
+ * @param[in] fmt is a printf()-style format string
+ *
+ * @return The number of characters printed.
+ */
+extern int printk_plugin(void *context, const char *fmt, ...);
+
+/**
+ * @brief Reporting Methods printf() Plugin
+ *
+ * This is a standard plug-in to support using printf() for output
+ * instead of printk().
+ *
+ * @param[in] context points to a user defined context.
+ * @param[in] fmt is a printf()-style format string
+ *
+ * @return The number of characters printed.
+ */
+extern int rtems_printf_plugin(void *context, const char *fmt, ...);
+
+/**@}*/
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif