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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

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//

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// 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

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

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

//

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

//####ECOSGPLCOPYRIGHTEND####

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

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

//

// Author(s):   hmt

// Contributors:hmt, jskov

// Date:        1999-06-08

// 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_io.h>             // IO macros

#include <cyg/hal/hal_diag.h>

#include <cyg/hal/hal_intr.h>           // Interrupt macros

#if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)

#include <cyg/hal/hal_stub.h>           // hal_output_gdb_string

#endif

#include <cyg/hal/ppc_regs.h>

#include <cyg/hal/quicc/quicc_smc1.h>

void

cyg_hal_plf_comms_init(void)

{

    static int initialized = 0;

    if (initialized)

        return;

    initialized = 1;

    cyg_hal_plf_serial_init();

}

#if !defined(CYGSEM_HAL_VIRTUAL_VECTOR_DIAG)

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

// Select default diag channel to use

//#define CYG_KERNEL_DIAG_ROMART

//#define CYG_KERNEL_DIAG_SERIAL

#if !defined(CYG_KERNEL_DIAG_SERIAL)

#define CYG_KERNEL_DIAG_SERIAL

#endif

#ifdef CYGDBG_DIAG_BUF

// Keep diag messages in a buffer for later [re]display

int enable_diag_uart = 1;

int enable_diag_buf = 1;

static char diag_buf[40960*4];

static int  diag_buf_ptr = 0;

static void

diag_putc(char c)

{

    if (enable_diag_buf) {

        diag_buf[diag_buf_ptr++] = c;

        if (diag_buf_ptr == sizeof(diag_buf)) diag_buf_ptr--;

    }

}

void

dump_diag_buf(int start, int len)

{

    int i;

    enable_diag_uart = 1;

    enable_diag_buf = 0;

    if (len == 0) len = diag_buf_ptr;

    diag_printf("\nDiag buf\n");

    for (i = start;  i < len;  i++) {

        hal_diag_write_char(diag_buf[i]);

    }

}

#endif // CYGDBG_DIAG_BUF

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

// MBX board specific serial output; using GDB protocol by default:

#if defined(CYG_KERNEL_DIAG_SERIAL)

EPPC *eppc;

void hal_diag_init(void)

{

    static int init = 0;

    if (init) return;

    init++;

    // hardwired base

    eppc = eppc_base();

    // init the actual serial port

    cyg_hal_plf_serial_init_channel();

#ifdef CYGSEM_HAL_DIAG_MANGLER_GDB

#ifndef CYG_HAL_STARTUP_ROM

    // We are talking to GDB; ack the "go" packet!

    cyg_hal_plf_serial_putc(eppc, '+');

#endif

#endif

}

void hal_diag_write_char_serial( char c )

{

    unsigned long __state;

    HAL_DISABLE_INTERRUPTS(__state);

    cyg_hal_plf_serial_putc(eppc, c);

    HAL_RESTORE_INTERRUPTS(__state);

}

#if defined(CYG_HAL_STARTUP_ROM) || !defined(CYGDBG_HAL_DIAG_TO_DEBUG_CHAN)

void hal_diag_write_char(char c)

{

#ifdef CYGDBG_DIAG_BUF

    diag_putc(c);

    if (!enable_diag_uart) return;

#endif // CYGDBG_DIAG_BUF

    hal_diag_write_char_serial(c);

}

#else // RAM start so encode for GDB

void hal_diag_write_char(char c)

{

    static char line[100];

    static int pos = 0;

#ifdef CYGDBG_DIAG_BUF

    diag_putc(c);

    if (!enable_diag_uart) return;

#endif // CYGDBG_DIAG_BUF

    // No need to send CRs

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

    line[pos++] = c;

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

    {

        CYG_INTERRUPT_STATE old;

        // 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.

#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS

        CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION(old);

#else

        HAL_DISABLE_INTERRUPTS(old);

#endif

        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]);

#ifndef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT

            // only gobble characters if no interrupt handler to grab ^Cs

            // is installed (which is exclusive with device driver use)

            // Wait for the ACK character '+' from GDB here and handle

            // receiving a ^C instead.  This is the reason for this clause

            // being a loop.

            c = cyg_hal_plf_serial_getc(eppc);

            if( c == '+' )

                break;              // a good acknowledge

#if 0

            if( c1 == 3 ) {

                // Ctrl-C: breakpoint.

                breakpoint();

                break;

            }

#endif

            // otherwise, loop round again

#else

            break;

#endif

        }

        pos = 0;

        // And re-enable interrupts

#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS

        CYG_HAL_GDB_LEAVE_CRITICAL_IO_REGION(old);

#else

        HAL_RESTORE_INTERRUPTS(old);

#endif

    }

}

#endif // NOT def CYG_HAL_STARTUP_ROM

void hal_diag_read_char(char *c)

{

    *c = cyg_hal_plf_serial_getc(eppc);

}

#endif // CYG_KERNEL_DIAG_SERIAL

#endif // CYGSEM_HAL_VIRTUAL_VECTOR_DIAG

// EOF hal_diag.c