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/*=============================================================================

//

//      hal_diag.c

//

//      HAL diagnostic output code

//

//=============================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

//

// eCos is free software; you can redistribute it and/or modify it under

// the terms of the GNU General Public License as published by the Free

// Software Foundation; either version 2 or (at your option) any later version.

//

// eCos 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 eCos; if not, write to the Free Software Foundation, Inc.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

//

// As a special exception, if other files instantiate templates or use macros

// or inline functions from this file, or you compile this file and link it

// with other works to produce a work based on this file, this file does not

// by itself cause the resulting work to be covered by the GNU General Public

// License. However the source code for this file must still be made available

// in accordance with section (3) of the GNU General Public License.

//

// This exception does not invalidate any other reasons why a work based on

// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//=============================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):   nickg

// Contributors:        nickg

// Date:        1998-03-02

// Purpose:     HAL diagnostic output

// Description: Implementations of HAL diagnostic output support.

//

//####DESCRIPTIONEND####

//

//===========================================================================*/

#include <pkgconf/hal.h>

#include <cyg/infra/cyg_type.h>          // base types

#include <cyg/infra/cyg_trac.h>         // tracing macros

#include <cyg/infra/cyg_ass.h>          // assertion macros

#include <cyg/hal/hal_diag.h>

#include <cyg/hal/hal_intr.h>

#include <cyg/hal/hal_misc.h>

/*---------------------------------------------------------------------------*/

/* Select default diag channel to use                                        */

//#define CYG_KERNEL_DIAG_ROMART

//#define CYG_KERNEL_DIAG_SERIAL0

//#define CYG_KERNEL_DIAG_SERIAL1

//#define CYG_KERNEL_DIAG_SERIAL2

//#define CYG_KERNEL_DIAG_BUFFER

//#define CYG_KERNEL_DIAG_GDB

#if !defined(CYG_KERNEL_DIAG_SERIAL0) && \

    !defined(CYG_KERNEL_DIAG_SERIAL1) && \

    !defined(CYG_KERNEL_DIAG_SERIAL2) && \

    !defined(CYG_KERNEL_DIAG_ROMART)

#if defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs)

#define CYG_KERNEL_DIAG_SERIAL0

#define CYG_KERNEL_DIAG_GDB

#else

#define CYG_KERNEL_DIAG_SERIAL0

#endif

#endif

//#define CYG_HAL_MN10300_STB_SERIAL2

/*---------------------------------------------------------------------------*/

// MN10300 Serial line

#if defined(CYG_HAL_MN10300_STB_SERIAL0) || defined(CYG_KERNEL_DIAG_SERIAL0)

// We use serial0 on AM33

#define SERIAL0_CR       ((volatile cyg_uint16 *)0xd4002000)

#define SERIAL0_ICR      ((volatile cyg_uint8 *) 0xd4002004)

#define SERIAL0_TXR      ((volatile cyg_uint8 *) 0xd4002008)

#define SERIAL0_RXR      ((volatile cyg_uint8 *) 0xd4002009)

#define SERIAL0_SR       ((volatile cyg_uint16 *)0xd400200c)

// Timer 2 provides baud rate divisor

#define TIMER0_MD       ((volatile cyg_uint8 *)0xd4003002)

#define TIMER0_BR       ((volatile cyg_uint8 *)0xd4003012)

#define TIMER0_CR       ((volatile cyg_uint8 *)0xd4003022)

// Timer 0 provides a prescaler for lower baud rates

#define HW_TIMER0_MD       ((volatile cyg_uint8 *)0xd4003000)

#define HW_TIMER0_BR       ((volatile cyg_uint8 *)0xd4003010)

#define HW_TIMER0_CR       ((volatile cyg_uint8 *)0xd4003020)

#define SIO_LSTAT_TRDY  0x20

#define SIO_LSTAT_RRDY  0x10

#define SERIAL_CR_TXE   0x8000

void hal_diag_init_serial0(void)

{

#if 1    

    // 99 translates to 38400 baud.

    *TIMER0_BR = 99;

    // Timer0 sourced from IOCLK

    *TIMER0_MD = 0x80;

#else

    // 1 and 198 translate into 9800 baud

    *TIMER0_BR = 1;

    *TIMER0_MD = 0x84;          // source = timer 0 overflow

    *HW_TIMER0_BR = 198;        // timer 0 base register

    *HW_TIMER0_CR = 0x80;       // source from ioclk

#endif

    // No interrupts for now.

    *SERIAL0_ICR = 0x00;

    // Source from timer 1, 8bit chars, enable tx and rx

    *SERIAL0_CR = 0xc085;

}

void hal_diag_write_char_serial0(char c)

{

    register volatile cyg_uint16 *volatile tty_status = SERIAL0_SR;

    register volatile cyg_uint8 *volatile tty_tx = SERIAL0_TXR;

    while( (*tty_status & SIO_LSTAT_TRDY) != 0 ) continue;

    *tty_tx = c;

}

void hal_diag_drain_serial0(void)

{

    register volatile cyg_uint16 *volatile tty_status = SERIAL0_SR;

    while( (*tty_status & SIO_LSTAT_TRDY) != 0 ) continue;

}

void hal_diag_read_char_serial0(char *c)

{

    register volatile cyg_uint16 *volatile tty_status = SERIAL0_SR;

    register volatile cyg_uint8 *volatile tty_rx = SERIAL0_RXR;

    while( (*tty_status & SIO_LSTAT_RRDY) == 0 ) continue;

    *c = *tty_rx;

    // We must ack the interrupt caused by that read to avoid

    // confusing the GDB stub ROM.

    HAL_INTERRUPT_ACKNOWLEDGE( CYGNUM_HAL_INTERRUPT_SERIAL_0_RX );

}

#if defined(CYG_KERNEL_DIAG_SERIAL0)

#define hal_diag_init_serial hal_diag_init_serial0

#define hal_diag_write_char_serial hal_diag_write_char_serial0

#define hal_diag_drain_serial hal_diag_drain_serial0

#define hal_diag_read_char_serial hal_diag_read_char_serial0

#endif

#endif

/*---------------------------------------------------------------------------*/

// MN10300 Serial line

#if defined(CYG_HAL_MN10300_STB_SERIAL1) || defined(CYG_KERNEL_DIAG_SERIAL1)

// We use serial1 on MN103002

#define SERIAL1_CR       ((volatile cyg_uint16 *)0xd4002010)

#define SERIAL1_ICR      ((volatile cyg_uint8 *) 0xd4002014)

#define SERIAL1_TXR      ((volatile cyg_uint8 *) 0xd4002018)

#define SERIAL1_RXR      ((volatile cyg_uint8 *) 0xd4002019)

#define SERIAL1_SR       ((volatile cyg_uint16 *)0xd400201c)

// Timer 1 provided baud rate divisor

#define TIMER1_MD       ((volatile cyg_uint8 *)0xd4003001)

#define TIMER1_BR       ((volatile cyg_uint8 *)0xd4003011)

#define TIMER1_CR       ((volatile cyg_uint8 *)0xd4003021)

// Timer 0 provides a prescaler for lower baud rates

#define HW_TIMER0_MD       ((volatile cyg_uint8 *)0xd4003000)

#define HW_TIMER0_BR       ((volatile cyg_uint8 *)0xd4003010)

#define HW_TIMER0_CR       ((volatile cyg_uint8 *)0xd4003020)

#define SIO1_LSTAT_TRDY  0x20

#define SIO1_LSTAT_RRDY  0x10

#define SERIAL_CR_TXE   0x8000

void hal_diag_init_serial1(void)

{

#if 1    

    // 99 translates to 38400 baud.

    *TIMER1_BR = 99;

    // Timer1 sourced from IOCLK

    *TIMER1_MD = 0x80;

#else

    // 1 and 198 translate into 9800 baud

    *TIMER1_BR = 1;

    *TIMER1_MD = 0x84;          // source = timer 0 overflow

    *HW_TIMER0_BR = 198;        // timer 0 base register

    *HW_TIMER0_CR = 0x80;       // source from ioclk

#endif

    // No interrupts for now.

    *SERIAL1_ICR = 0x00;

    // Source from timer 1, 8bit chars, enable tx and rx

    *SERIAL1_CR = 0xc084;

}

void hal_diag_write_char_serial1(char c)

{

    register volatile cyg_uint16 *volatile tty_status = SERIAL1_SR;

    register volatile cyg_uint8 *volatile tty_tx = SERIAL1_TXR;

    while( (*tty_status & SIO1_LSTAT_TRDY) != 0 ) continue;

    *tty_tx = c;

}

void hal_diag_drain_serial1(void)

{

    register volatile cyg_uint16 *volatile tty_status = SERIAL1_SR;

    while( (*tty_status & SIO1_LSTAT_TRDY) != 0 ) continue;

}

void hal_diag_read_char_serial1(char *c)

{

    register volatile cyg_uint16 *volatile tty_status = SERIAL1_SR;

    register volatile cyg_uint8 *volatile tty_rx = SERIAL1_RXR;

    while( (*tty_status & SIO1_LSTAT_RRDY) == 0 ) continue;

    *c = *tty_rx;

    // We must ack the interrupt caused by that read to avoid

    // confusing the GDB stub ROM.

    HAL_INTERRUPT_ACKNOWLEDGE( CYGNUM_HAL_INTERRUPT_SERIAL_1_RX );

}

#if defined(CYG_KERNEL_DIAG_SERIAL1)

#define hal_diag_init_serial hal_diag_init_serial1

#define hal_diag_write_char_serial hal_diag_write_char_serial1

#define hal_diag_drain_serial hal_diag_drain_serial1

#define hal_diag_read_char_serial hal_diag_read_char_serial1

#endif

#endif

/*---------------------------------------------------------------------------*/

#if defined(CYG_HAL_MN10300_STB_SERIAL2) || defined(CYG_KERNEL_DIAG_SERIAL2)

// We use serial2 on MN103002

#define SERIAL2_CR       ((volatile cyg_uint16 *)0xd4002020)

#define SERIAL2_ICR      ((volatile cyg_uint8 *) 0xd4002024)

#define SERIAL2_TXR      ((volatile cyg_uint8 *) 0xd4002028)

#define SERIAL2_RXR      ((volatile cyg_uint8 *) 0xd4002029)

#define SERIAL2_SR       ((volatile cyg_uint8 *) 0xd400202c)

#define SERIAL2_TR       ((volatile cyg_uint8 *) 0xd400202d)

// Timer 3 provides baud rate divisor

#define TIMER2_MD       ((volatile cyg_uint8 *)0xd4003003)

#define TIMER2_BR       ((volatile cyg_uint8 *)0xd4003013)

#define TIMER2_CR       ((volatile cyg_uint8 *)0xd4003023)

#define SIO2_LSTAT_TRDY  0x20

#define SIO2_LSTAT_RRDY  0x10

void hal_diag_init_serial2(void)

{

#if 0

    {

        int i,j;

        for( j = 1; j < 255; j++ )

        {

            for(i = 1; i < 127; i++)

            {

                *TIMER2_BR = j;

                *SERIAL2_TR = i;

                // Timer2 sourced from IOCLK

                *TIMER2_MD = 0x80;

                // No interrupts for now.

                *SERIAL2_ICR = 0x00;

                // Source from timer 2, 8bit chars, enable tx and rx

                *SERIAL2_CR = 0xc081;

                diag_printf("\r\n<%03d,%03d>1234567890abcdefgh<%03d,%03d>\r\n",j,i,j,i);

            }

        }

    }

#endif

    // 7 and 102 translate to 38400 baud.

    // The AM33 documentation says that these values should be 7 and 113.

    // I have no explanation as to why there is such a discrepancy between the

    // documentation and the hardware.

    *TIMER2_BR = 7;

    *SERIAL2_TR = 102;

    // Timer2 sourced from IOCLK

    *TIMER2_MD = 0x80;

    // No interrupts for now.

    *SERIAL2_ICR = 0x00;

    // Source from timer 3, 8bit chars, enable tx and rx

    *SERIAL2_CR = 0xc083;

}

void hal_diag_write_char_serial2(char c)

{

    register volatile cyg_uint8 *volatile tty_status = SERIAL2_SR;

    register volatile cyg_uint8 *volatile tty_tx = SERIAL2_TXR;

    while( (*tty_status & SIO2_LSTAT_TRDY) != 0 ) continue;

    *tty_tx = c;

}

void hal_diag_drain_serial2(void)

{

    register volatile cyg_uint8 *volatile tty_status = SERIAL2_SR;

    while( (*tty_status & SIO2_LSTAT_TRDY) != 0 ) continue;

}

void hal_diag_read_char_serial2(char *c)

{

    register volatile cyg_uint8 *volatile tty_status = SERIAL2_SR;

    register volatile cyg_uint8 *volatile tty_rx = SERIAL2_RXR;

    while( (*tty_status & SIO2_LSTAT_RRDY) == 0 ) continue;

    *c = *tty_rx;

    // We must ack the interrupt caused by that read to avoid

    // confusing the GDB stub ROM.

    HAL_INTERRUPT_ACKNOWLEDGE( CYGNUM_HAL_INTERRUPT_SERIAL_2_RX );

}

#if defined(CYG_KERNEL_DIAG_SERIAL2)

#define hal_diag_init_serial hal_diag_init_serial2

#define hal_diag_write_char_serial hal_diag_write_char_serial2

#define hal_diag_drain_serial hal_diag_drain_serial2

#define hal_diag_read_char_serial hal_diag_read_char_serial2

#endif

#endif

/*---------------------------------------------------------------------------*/

#if defined(CYG_KERNEL_DIAG_BUFFER)

char hal_diag_buffer[10000];

int hal_diag_buffer_pos;

void hal_diag_init_buffer(void)

{

    hal_diag_buffer_pos = 0;

}

void hal_diag_write_char_buffer(char c)

{

    hal_diag_buffer[hal_diag_buffer_pos++] = c;

    if (hal_diag_buffer_pos >= sizeof(hal_diag_buffer) )

        hal_diag_buffer_pos = 0;

}

void hal_diag_drain_buffer(void)

{

}

void hal_diag_read_char_buffer(char *c)

{

    *c = '\n';

}

#define hal_diag_init_serial hal_diag_init_buffer

#define hal_diag_write_char_serial hal_diag_write_char_buffer

#define hal_diag_drain_serial hal_diag_drain_buffer

#define hal_diag_read_char_serial hal_diag_read_char_buffer

#endif

/*---------------------------------------------------------------------------*/

void hal_diag_init(void)

{

    hal_diag_init_serial();

}

void hal_diag_write_char(char c)

{

#ifdef CYG_KERNEL_DIAG_GDB

    static char line[100];

    static int pos = 0;

    // No need to send CRs

    if( c == '\r' ) return;

    line[pos++] = c;

    if( c == '\n' || pos == sizeof(line) )

    {

        // Disable interrupts. This prevents GDB trying to interrupt us

        // while we are in the middle of sending a packet. The serial

        // receive interrupt will be seen when we re-enable interrupts

        // later.

        CYG_INTERRUPT_STATE oldstate;

        CYG_BYTE wdcr;

        HAL_DISABLE_INTERRUPTS(oldstate);

        // Beacuse of problems with NT on the testfarm, we also have

        // to disable the watchdog here. This only matters in the

        // watchdog tests. And yes, this sends my irony meter off the

        // scale too.

        HAL_READ_UINT8( 0xC0001002, wdcr );

        HAL_WRITE_UINT8( 0xC0001002, wdcr&0x3F );

        while(1)

        {

            static char hex[] = "0123456789ABCDEF";

            cyg_uint8 csum = 0;

            int i;

            hal_diag_write_char_serial('$');

            hal_diag_write_char_serial('O');

            csum += 'O';

            for( i = 0; i < pos; i++ )

            {

                char ch = line[i];

                char h = hex[(ch>>4)&0xF];

                char l = hex[ch&0xF];

                hal_diag_write_char_serial(h);

                hal_diag_write_char_serial(l);

                csum += h;

                csum += l;

            }

            hal_diag_write_char_serial('#');

            hal_diag_write_char_serial(hex[(csum>>4)&0xF]);

            hal_diag_write_char_serial(hex[csum&0xF]);

            {

                char c1;

                hal_diag_read_char_serial( &c1 );

                if( c1 == '+' ) break;

                if( cyg_hal_is_break( &c1, 1 ) )

                    cyg_hal_user_break( NULL );

            }

        }

        pos = 0;

        // Wait for tx buffer to drain

        hal_diag_drain_serial();

        // And re-enable interrupts

        HAL_RESTORE_INTERRUPTS(oldstate);

        HAL_WRITE_UINT8( 0xC0001002, wdcr );

    }

#else

    hal_diag_write_char_serial(c);

#endif    

}

void hal_diag_read_char(char *c)

{

    hal_diag_read_char_serial(c);

}

/*---------------------------------------------------------------------------*/

/* End of hal_diag.c */