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

//

//      hal_diag.c

//

//      HAL diagnostic output code

//

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

//####ECOSGPLCOPYRIGHTBEGIN####

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

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

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//####ECOSGPLCOPYRIGHTEND####

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

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

//

// Author(s):   jskov

// Contributors:nickg, jskov

// Date:        2000-05-10

// Purpose:     HAL diagnostic output

// Description: Implementations of HAL diagnostic output support.

//

//####DESCRIPTIONEND####

//

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

#include <pkgconf/hal.h>

#if !defined(CYGSEM_HAL_VIRTUAL_VECTOR_DIAG)

#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_arch.h>

#include <cyg/hal/hal_diag.h>

#include <cyg/hal/hal_intr.h>

#include <cyg/hal/hal_misc.h>           // Helper functions

#include <cyg/hal/hal_io.h>

#include <cyg/hal/hal_if.h>             // ROM calling interface

#if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)

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

#endif

externC void cyg_hal_plf_serial_init_channel(void* __ch_data);

externC void cyg_hal_plf_serial_putc(void* __ch_data, cyg_uint8 __ch);

externC cyg_uint8 cyg_hal_plf_serial_getc(void* __ch_data);

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

// Hit the hardware directly. Either wrap in GDB O-packets, or write

// data raw to device.

// Decide when to wrap text output as GDB O-packets

#if (CYGNUM_HAL_VIRTUAL_VECTOR_DEBUG_CHANNEL \

     == CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL)

#if defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs) \

    || defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)

#define CYG_DIAG_GDB

#endif

#endif

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

// There are two serial ports. Hardwire to use one of them.

#define CYG_DEVICE_SERIAL_SCC1    0xb40003f8 // port 1

#define CYG_DEVICE_SERIAL_SCC2    0xb40002f8 // port 2

typedef struct {

    cyg_uint8* base;

    cyg_int32 msec_timeout;

    int isr_vector;

} channel_data_t;

#if (CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL == 0)

#define BASE ((cyg_uint8*)CYG_DEVICE_SERIAL_SCC1)

#else

#define BASE ((cyg_uint8*)CYG_DEVICE_SERIAL_SCC2)

#endif

static channel_data_t channel = { BASE, 0, 0};

#ifdef CYG_DIAG_GDB

void

hal_diag_write_char(char c)

{

    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) )

    {

        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;

            char c1;

            cyg_hal_plf_serial_putc(&channel, '$');

            cyg_hal_plf_serial_putc(&channel, 'O');

            csum += 'O';

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

            {

                char ch = line[i];

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

                char l = hex[ch&0xF];

                cyg_hal_plf_serial_putc(&channel, h);

                cyg_hal_plf_serial_putc(&channel, l);

                csum += h;

                csum += l;

            }

            cyg_hal_plf_serial_putc(&channel, '#');

            cyg_hal_plf_serial_putc(&channel, hex[(csum>>4)&0xF]);

            cyg_hal_plf_serial_putc(&channel, hex[csum&0xF]);

            c1 = cyg_hal_plf_serial_getc(&channel);

            if( c1 == '+' ) break;

        }

        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

    }

}

void

hal_diag_read_char(char *c)

{

    *c = cyg_hal_plf_serial_getc(&channel);

}

#else // CYG_DIAG_GDB

// Hit the hardware directly, no GDB translation

void

hal_diag_read_char(char *c)

{

    *c = cyg_hal_plf_serial_getc(&channel);

}

void

hal_diag_write_char(char c)

{

    cyg_hal_plf_serial_putc(&channel, c);

}

#endif

// Reagardless whether encoding or not we alway initialize the device.

void

hal_diag_init(void)

{

    // Init serial device

    cyg_hal_plf_serial_init_channel((void*)&channel);

}

#endif // CYGSEM_HAL_VIRTUAL_VECTOR_DIAG

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

// End of hal_diag.c