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/*
 *  Copyright(c) Siemens AG, Muenchen, Germany, 2005, 2006, 2007
 *                           Bernhard Walle <bernhard.walle@gmx.de>
 *                           Gernot Hillier <gernot.hillier@siemens.com>
 *
 * ----------------------------------------------------------------------------
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as 
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 * ----------------------------------------------------------------------------
 */
#ifndef MOST_MEASUREMENTS_H
#define MOST_MEASUREMENTS_H

#ifdef HAVE_CONFIG_H
#include "config/config.h"
#endif
#ifdef __KERNEL__
#  include "most-rxbuf.h"
#endif

/* print a compiler warning if measuring are turned on */
#if defined(MEASURING_PCI) || defined(MEASURING_SCHED)
#   warning "Driver is compiled with measurements turned on. This may give strange results!"
#endif

#define MEASUREMENT_MAGIC_START_HIGH        0x90520000

#define MEASUREMENT_MAGIC_END_HIGH          0x52900000

#define MEASUREMENT_MAGIC_START_REC_ISR                \
    (0x243A | MEASUREMENT_MAGIC_START_HIGH)

#define MEASUREMENT_MAGIC_END_REC_ISR                  \
    (0x3A24 | MEASUREMENT_MAGIC_END_HIGH)

#if defined(RT_RTDM) || defined(DOXYGEN)

#define MEASUREMENT_INT_CONSTANT                       \
    MOST_PCI_RESERVED_5
#else
#define MEASUREMENT_INT_CONSTANT                       \
    MOST_PCI_RESERVED_4
#endif

#define MOST_LH(low, high)                             \
    ((((high) & 0xFFFF) << 16) | ((low) & 0xFFFF))

#define MOST_LOW(value)                                \
    ((value) & 0xFFFF)

#define MOST_HIGH(value)                               \
    (((value) & 0xFFFF0000) > 16)


#ifdef __KERNEL__

#if defined(MEASURING_PCI) || defined(DOXYGEN) 

#define measuring_int_begin()                                               \
        do {                                                                \
            readreg_int(dev, MEASUREMENT_INT_CONSTANT);                     \
        } while (0)

#define measuring_int_end()                                                 \
        do {                                                                \
            udelay(1);                                                      \
            readreg_int(dev, MOST_PCI_RESERVED_6);                          \
        } while (0)

#define measuring_int_error_sharing()                                       \
        rtnrt_warn("IRQ sharing is not supported with measurements\n")

#else
#define measuring_int_begin()                                               \
        do { } while (0)
#define measuring_int_end()                                                 \
        do { } while (0)
#define measuring_int_error_sharing()                                       \
        do { } while (0)
#endif

#endif /* __KERNEL__ */

struct measuring_schedlat_data {
    unsigned int        magic_start;    
    unsigned int        counter;        
    unsigned long long  tsc;            
    unsigned int        magic_end;      
} __attribute__((packed));


#ifdef __KERNEL__
#if defined(MEASURING_SCHED) || defined(DOXYGEN)

static struct rx_buffer rxbuf_copy;

static inline void measuring_receive_isr_start(struct rx_buffer *buffer)
{
    rxbuf_copy = *buffer;
}

static inline void measuring_receive_isr_wakeup(void)
{
    static unsigned int                cnt = 0;
    struct measuring_schedlat_data     data;

    data.magic_start = MEASUREMENT_MAGIC_START_REC_ISR;
    data.counter = cnt++;
    data.magic_end = MEASUREMENT_MAGIC_END_REC_ISR;
    rdtscll(data.tsc);
    rxbuf_put(&rxbuf_copy, (void *)&data, sizeof(data));
}
#else
static inline void measuring_receive_isr_start(struct rx_buffer *buffer)
{}
static inline void measuring_receive_isr_wakeup(void)
{}
#endif
#endif /* __KERNEL__ */


#if defined(MEASURING_SCHED) || defined(MEASURING_PCI) || defined(DOXYGEN)

static inline void print_measuring_warning(void)
{
    rtnrt_warn("Measuring turned on. This may give strange "
            "results in normal operation!\n");
}
#else
static inline void print_measuring_warning(void)
{}
#endif

#endif /* MOST_MEASUREMENTS_H */

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