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

//

//      hal_if.c

//

//      ROM/RAM interfacing functions

//

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

//####ECOSGPLCOPYRIGHTBEGIN####

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

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

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

// Copyright (C) 2002 Gary Thomas

//

// 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):   jskov

// Contributors:jskov

// Date:        2000-06-07

//

//####DESCRIPTIONEND####

//

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

#include <pkgconf/hal.h>

#ifdef CYGPKG_KERNEL

# include <pkgconf/kernel.h>

#endif

#include <cyg/infra/cyg_ass.h>          // assertions

#include <cyg/hal/hal_arch.h>           // set/restore GP

#include <cyg/hal/hal_io.h>             // IO macros

#include <cyg/hal/hal_if.h>             // our interface

#include <cyg/hal/hal_diag.h>           // Diag IO

#include <cyg/hal/hal_misc.h>           // User break

#include <cyg/hal/hal_stub.h>           // stub functionality

#include <cyg/hal/hal_intr.h>           // hal_vsr_table and others

#ifdef CYGPKG_REDBOOT

#include <pkgconf/redboot.h>

#ifdef CYGSEM_REDBOOT_FLASH_CONFIG

#include <redboot.h>

#include <flash_config.h>

#endif

#endif

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

externC void patch_dbg_syscalls(void * vector);

externC void init_thread_syscall(void * vector);

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

// Implementations and function wrappers for monitor services

// flash config state queries

#ifdef CYGSEM_REDBOOT_FLASH_CONFIG

static __call_if_flash_cfg_op_fn_t flash_config_op;

static cyg_bool

flash_config_op( int op, char * key, void *val, int type)

{

    cyg_bool res = false;

    CYGARC_HAL_SAVE_GP();

    switch ( op ) {

    case CYGNUM_CALL_IF_FLASH_CFG_GET:

        res = flash_get_config( key, val, type );

        break;

    default:

        // nothing else supported yet - though it is expected that "set"

        // will fit the same set of arguments, potentially.

        break;

    }

    CYGARC_HAL_RESTORE_GP();

    return res;

}

#endif

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

// Delay uS

#ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_DELAY_US

static __call_if_delay_us_t delay_us;

static void

delay_us(cyg_int32 usecs)

{

    CYGARC_HAL_SAVE_GP();

#ifdef CYGPKG_KERNEL

    {

        cyg_int32 start, elapsed;

        cyg_int32 usec_ticks, slice;

        // How many ticks total we should wait for.

        usec_ticks = usecs*CYGNUM_KERNEL_COUNTERS_RTC_PERIOD;

        usec_ticks /= CYGNUM_HAL_RTC_NUMERATOR/CYGNUM_HAL_RTC_DENOMINATOR/1000;

        do {

            // Spin in slices of 1/2 the RTC period. Allows interrupts

            // time to run without messing up the algorithm. If we spun

            // for 1 period (or more) of the RTC, there'd be also problems

            // figuring out when the timer wrapped.  We may lose a tick or

            // two for each cycle but it shouldn't matter much.

            slice = usec_ticks % (CYGNUM_KERNEL_COUNTERS_RTC_PERIOD / 2);

            HAL_CLOCK_READ(&start);

            do {

                HAL_CLOCK_READ(&elapsed);

                elapsed = (elapsed - start); // counts up!

                if (elapsed < 0)

                    elapsed += CYGNUM_KERNEL_COUNTERS_RTC_PERIOD;

            } while (elapsed < slice);

            // Adjust by elapsed, not slice, since an interrupt may have

            // been stalling us for some time.

            usec_ticks -= elapsed;

        } while (usec_ticks > 0);

    }

#else // CYGPKG_KERNEL

#ifdef HAL_DELAY_US

    // Use a HAL feature if defined

    HAL_DELAY_US(usecs);

#else

    // If no accurate delay mechanism, just spin for a while. Having

    // an inaccurate delay is much better than no delay at all. The

    // count of 10 should mean the loop takes something resembling

    // 1us on most CPUs running between 30-100MHz [depends on how many

    // instructions this compiles to, how many dispatch units can be

    // used for the simple loop, actual CPU frequency, etc]

    while (usecs-- > 0) {

        int i;

        for (i = 0; i < 10; i++);

    }

#endif // HAL_DELAY_US

#endif // CYGPKG_KERNEL

    CYGARC_HAL_RESTORE_GP();

}

#endif // CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_DELAY_US

// Reset functions

#ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_RESET

static __call_if_reset_t reset;

static void

reset(void)

{

    CYGARC_HAL_SAVE_GP();

    // With luck, the platform defines some magic that will cause a hardware

    // reset.

    HAL_PLATFORM_RESET();

#ifdef HAL_PLATFORM_RESET_ENTRY

    // If that's not the case (above is an empty statement) there may

    // be defined an address we can jump to - and effectively

    // reinitialize the system. Not quite as good as a reset, but it

    // is often enough.

    goto *HAL_PLATFORM_RESET_ENTRY;

#else

#error " no RESET_ENTRY"

#endif

    CYGARC_HAL_RESTORE_GP();

}

// This is the system's default kill signal routine. Unless overridden

// by the application, it will cause a board reset when GDB quits the

// connection. (The user can avoid the reset by using the GDB 'detach'

// command instead of 'kill' or 'quit').

static int

kill_by_reset(int __irq_nr, void* __regs)

{

    CYGARC_HAL_SAVE_GP();

    reset();

    CYGARC_HAL_RESTORE_GP();

    return 0;

}

#endif

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

// NOP service

#if defined(CYGSEM_HAL_VIRTUAL_VECTOR_INIT_WHOLE_TABLE) || \

    defined(CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_COMMS)

static int

nop_service(void)

{

    // This is the default service. It always returns false (0), and

    // _does not_ trigger any assertions. Clients must either cope

    // with the service failure or assert.

    return 0;

}

#endif

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

// Comm controls

#ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_COMMS

#ifdef CYGNUM_HAL_VIRTUAL_VECTOR_AUX_CHANNELS

#define CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS \

  (CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS+CYGNUM_HAL_VIRTUAL_VECTOR_AUX_CHANNELS)

#else

#define CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS \

  CYGNUM_HAL_VIRTUAL_VECTOR_COMM_CHANNELS

#endif

static hal_virtual_comm_table_t comm_channels[CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS+1];

static int

set_debug_comm(int __comm_id)

{

    static int __selected_id = CYGNUM_CALL_IF_SET_COMM_ID_EMPTY;

    hal_virtual_comm_table_t* __chan;

    int interrupt_state = 0;

    int res = 1, update = 0;

    CYGARC_HAL_SAVE_GP();

    CYG_ASSERT(__comm_id >= CYGNUM_CALL_IF_SET_COMM_ID_MANGLER

               && __comm_id < CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS,

               "Invalid channel");

    switch (__comm_id) {

    case CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT:

        if (__selected_id > 0)

            res = __selected_id-1;

        else if (__selected_id == 0)

            res = CYGNUM_CALL_IF_SET_COMM_ID_MANGLER;

        else

            res = __selected_id;

        break;

    case CYGNUM_CALL_IF_SET_COMM_ID_EMPTY:

        CYGACC_CALL_IF_DEBUG_PROCS_SET(0);

        __selected_id = __comm_id;

        break;

    case CYGNUM_CALL_IF_SET_COMM_ID_MANGLER:

        __comm_id = 0;

        update = 1;

        break;

    default:

        __comm_id++;                    // skip mangler entry

        update = 1;

        break;

    }

    if (update) {

        // Find the interrupt state of the channel.

        __chan = CYGACC_CALL_IF_DEBUG_PROCS();

        if (__chan)

            interrupt_state = CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_DISABLE);

        __selected_id = __comm_id;

        CYGACC_CALL_IF_DEBUG_PROCS_SET(comm_channels[__comm_id]);

        // Set interrupt state on the new channel.

        __chan = CYGACC_CALL_IF_DEBUG_PROCS();

        if (interrupt_state)

            CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_ENABLE);

        else

            CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_IRQ_DISABLE);

    }

    CYGARC_HAL_RESTORE_GP();

    return res;

}

static int

set_console_comm(int __comm_id)

{

    static int __selected_id = CYGNUM_CALL_IF_SET_COMM_ID_EMPTY;

    int res = 1, update = 0;

    CYGARC_HAL_SAVE_GP();

    CYG_ASSERT(__comm_id >= CYGNUM_CALL_IF_SET_COMM_ID_MANGLER

               && __comm_id < CYGNUM_HAL_VIRTUAL_VECTOR_NUM_CHANNELS,

               "Invalid channel");

    switch (__comm_id) {

    case CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT:

        if (__selected_id > 0)

            res = __selected_id-1;

        else if (__selected_id == 0)

            res = CYGNUM_CALL_IF_SET_COMM_ID_MANGLER;

        else

            res = __selected_id;

        break;

    case CYGNUM_CALL_IF_SET_COMM_ID_EMPTY:

        CYGACC_CALL_IF_CONSOLE_PROCS_SET(0);

        __selected_id = __comm_id;

        break;

    case CYGNUM_CALL_IF_SET_COMM_ID_MANGLER:

        __comm_id = 0;

        update = 1;

        break;

    default:

        __comm_id++;                    // skip mangler entry

        update = 1;

        break;

    }

    if (update) {

        __selected_id = __comm_id;

        CYGACC_CALL_IF_CONSOLE_PROCS_SET(comm_channels[__comm_id]);

    }

    CYGARC_HAL_RESTORE_GP();

    return res;

}

#endif

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

// Cache functions

#ifdef CYGSEM_HAL_VIRTUAL_VECTOR_CLAIM_CACHE

static void

flush_icache(void *__p, int __nbytes)

{

    CYGARC_HAL_SAVE_GP();

#ifdef HAL_ICACHE_FLUSH

    HAL_ICACHE_FLUSH( __p , __nbytes );

#elif defined(HAL_ICACHE_INVALIDATE)

    HAL_ICACHE_INVALIDATE();

#endif

    CYGARC_HAL_RESTORE_GP();

}

static void

flush_dcache(void *__p, int __nbytes)

{

    CYGARC_HAL_SAVE_GP();

#ifdef HAL_DCACHE_FLUSH

    HAL_DCACHE_FLUSH( __p , __nbytes );

#elif defined(HAL_DCACHE_INVALIDATE)

    HAL_DCACHE_INVALIDATE();

#endif

    CYGARC_HAL_RESTORE_GP();

}

#endif

#if defined(CYGSEM_HAL_VIRTUAL_VECTOR_DIAG)

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

// GDB console output mangler (O-packetizer)

// COMMS init function at end.

// This gets called via the virtual vector console comms entry and

// handles O-packetization. The debug comms entries are used for the

// actual device IO.

static cyg_uint8

cyg_hal_diag_mangler_gdb_getc(void* __ch_data)

{

    cyg_uint8 __ch;

    hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();

    CYGARC_HAL_SAVE_GP();

    __ch = CYGACC_COMM_IF_GETC(*__chan);

    CYGARC_HAL_RESTORE_GP();

    return __ch;

}

static char __mangler_line[100];

static int  __mangler_pos = 0;

static void

cyg_hal_diag_mangler_gdb_flush(void* __ch_data)

{

    CYG_INTERRUPT_STATE old;

    hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();

    // Nothing to do if mangler buffer is empty.

    if (__mangler_pos == 0)

        return;

    // 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.

#if defined(CYG_HAL_STARTUP_ROM) \

    || !defined(CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION)

    HAL_DISABLE_INTERRUPTS(old);

#else

    CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION(old);

#endif

#if CYGNUM_HAL_DEBUG_GDB_PROTOCOL_RETRIES != 0

    // Only wait 500ms for data to arrive - avoid "stuck" connections

    CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_SET_TIMEOUT, CYGNUM_HAL_DEBUG_GDB_PROTOCOL_TIMEOUT);

#endif

    while(1)

    {

        static const char hex[] = "0123456789ABCDEF";

        cyg_uint8 csum = 0, c1;

        int i;

        CYGACC_COMM_IF_PUTC(*__chan, '$');

        CYGACC_COMM_IF_PUTC(*__chan, 'O');

        csum += 'O';

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

        {

            char ch = __mangler_line[i];

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

            char l = hex[ch&0xF];

            CYGACC_COMM_IF_PUTC(*__chan, h);

            CYGACC_COMM_IF_PUTC(*__chan, l);

            csum += h;

            csum += l;

        }

        CYGACC_COMM_IF_PUTC(*__chan, '#');

        CYGACC_COMM_IF_PUTC(*__chan, hex[(csum>>4)&0xF]);

        CYGACC_COMM_IF_PUTC(*__chan, hex[csum&0xF]);

    nak:

#if CYGNUM_HAL_DEBUG_GDB_PROTOCOL_RETRIES != 0

        if (CYGACC_COMM_IF_GETC_TIMEOUT(*__chan, &c1) == 0) {

            c1 = '-';

            if (tries && (--tries == 0)) c1 = '+';

        }

#else

        c1 = CYGACC_COMM_IF_GETC(*__chan);

#endif

        if( c1 == '+' ) break;

        if( cyg_hal_is_break( &c1 , 1 ) ) {

            // Caller's responsibility to react on this.

            CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG_SET(1);

            break;

        }

        if( c1 != '-' ) goto nak;

    }

    __mangler_pos = 0;

    // And re-enable interrupts

#if defined(CYG_HAL_STARTUP_ROM) \

    || !defined(CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION)

    HAL_RESTORE_INTERRUPTS(old);

#else

    CYG_HAL_GDB_LEAVE_CRITICAL_IO_REGION(old);

#endif

}

static void

cyg_hal_diag_mangler_gdb_putc(void* __ch_data, cyg_uint8 c)

{

#if CYGNUM_HAL_DEBUG_GDB_PROTOCOL_RETRIES != 0

    int tries = CYGNUM_HAL_DEBUG_GDB_PROTOCOL_RETRIES;

#endif

    // No need to send CRs

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

    CYGARC_HAL_SAVE_GP();

    __mangler_line[__mangler_pos++] = c;

    if( c == '\n' || __mangler_pos == sizeof(__mangler_line) )

        cyg_hal_diag_mangler_gdb_flush(__ch_data);

    CYGARC_HAL_RESTORE_GP();

}

static void

cyg_hal_diag_mangler_gdb_write(void* __ch_data,

                               const cyg_uint8* __buf, cyg_uint32 __len)

{

    CYGARC_HAL_SAVE_GP();

    while(__len-- > 0)

        cyg_hal_diag_mangler_gdb_putc(__ch_data, *__buf++);

    CYGARC_HAL_RESTORE_GP();

}

static void

cyg_hal_diag_mangler_gdb_read(void* __ch_data,

                              cyg_uint8* __buf, cyg_uint32 __len)

{

    CYGARC_HAL_SAVE_GP();

    while(__len-- > 0)

        *__buf++ = cyg_hal_diag_mangler_gdb_getc(__ch_data);

    CYGARC_HAL_RESTORE_GP();

}

static int

cyg_hal_diag_mangler_gdb_control(void *__ch_data,

                                 __comm_control_cmd_t __func, ...)

{

    CYGARC_HAL_SAVE_GP();

    if (__func == __COMMCTL_FLUSH_OUTPUT)

        cyg_hal_diag_mangler_gdb_flush(__ch_data);

    CYGARC_HAL_RESTORE_GP();

    return 0;

}

// This is the COMMS init function. It gets called both by the stubs

// and diag init code to initialize the COMMS mangler channel table -

// that's all. The callers have to decide whether to actually use this

// channel.

void

cyg_hal_diag_mangler_gdb_init(void)

{

    hal_virtual_comm_table_t* comm;

    int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);

    // Initialize mangler procs

    CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_MANGLER);

    comm = CYGACC_CALL_IF_CONSOLE_PROCS();

    CYGACC_COMM_IF_WRITE_SET(*comm, cyg_hal_diag_mangler_gdb_write);

    CYGACC_COMM_IF_READ_SET(*comm, cyg_hal_diag_mangler_gdb_read);

    CYGACC_COMM_IF_PUTC_SET(*comm, cyg_hal_diag_mangler_gdb_putc);

    CYGACC_COMM_IF_GETC_SET(*comm, cyg_hal_diag_mangler_gdb_getc);

    CYGACC_COMM_IF_CONTROL_SET(*comm, cyg_hal_diag_mangler_gdb_control);

    // Restore the original console channel.

    CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);

}

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

// Null console output mangler

// COMMS init function at end.

// This gets called via the virtual vector console comms entry and

// just forwards IO to the debug comms entries.

// This differs from setting the console channel to the same as the

// debug channel in that console output will go to the debug channel

// even if the debug channel is changed.

static cyg_uint8

cyg_hal_diag_mangler_null_getc(void* __ch_data)

{

    cyg_uint8 __ch;

    hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();

    CYGARC_HAL_SAVE_GP();

    __ch = CYGACC_COMM_IF_GETC(*__chan);

    CYGARC_HAL_RESTORE_GP();

    return __ch;

}

static void

cyg_hal_diag_mangler_null_putc(void* __ch_data, cyg_uint8 c)

{

    hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_DEBUG_PROCS();

    CYGARC_HAL_SAVE_GP();

    CYGACC_COMM_IF_PUTC(*__chan, c);

    CYGARC_HAL_RESTORE_GP();

}

static void

cyg_hal_diag_mangler_null_write(void* __ch_data,

                                const cyg_uint8* __buf, cyg_uint32 __len)

{

    CYGARC_HAL_SAVE_GP();

    while(__len-- > 0)

        cyg_hal_diag_mangler_null_putc(__ch_data, *__buf++);

    CYGARC_HAL_RESTORE_GP();

}

static void

cyg_hal_diag_mangler_null_read(void* __ch_data,

                               cyg_uint8* __buf, cyg_uint32 __len)

{

    CYGARC_HAL_SAVE_GP();

    while(__len-- > 0)

        *__buf++ = cyg_hal_diag_mangler_null_getc(__ch_data);

    CYGARC_HAL_RESTORE_GP();

}

static int

cyg_hal_diag_mangler_null_control(void *__ch_data,

                                  __comm_control_cmd_t __func, ...)

{

    // Do nothing (yet).

    return 0;

}

// This is the COMMS init function. It gets called both by the stubs

// and diag init code to initialize the COMMS mangler channel table -

// that's all. The callers have to decide whether to actually use this

// channel.

void

cyg_hal_diag_mangler_null_init(void)

{

    hal_virtual_comm_table_t* comm;

    int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);

    // Initialize mangler procs

    CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_MANGLER);

    comm = CYGACC_CALL_IF_CONSOLE_PROCS();

    CYGACC_COMM_IF_WRITE_SET(*comm, cyg_hal_diag_mangler_null_write);

    CYGACC_COMM_IF_READ_SET(*comm, cyg_hal_diag_mangler_null_read);

    CYGACC_COMM_IF_PUTC_SET(*comm, cyg_hal_diag_mangler_null_putc);

    CYGACC_COMM_IF_GETC_SET(*comm, cyg_hal_diag_mangler_null_getc);

    CYGACC_COMM_IF_CONTROL_SET(*comm, cyg_hal_diag_mangler_null_control);

    // Restore the original console channel.

    CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);

}

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

// Console IO functions that adhere to the virtual vector table semantics in

// order to ensure proper debug agent mangling when required.

//

externC void cyg_hal_plf_comms_init(void);

void

hal_if_diag_init(void)

{

    // This function may be called from various places and the code

    // should only run once.

    static cyg_uint8 called = 0;

    if (called) return;

    called = 1;

#ifndef CYGSEM_HAL_VIRTUAL_VECTOR_INHERIT_CONSOLE

#if defined(CYGDBG_HAL_DIAG_TO_DEBUG_CHAN)

    // Use the mangler channel, which in turn uses the debug channel.

    CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_MANGLER);

    // Initialize the mangler channel.

#if defined(CYGSEM_HAL_DIAG_MANGLER_GDB)

    cyg_hal_diag_mangler_gdb_init();

#elif defined(CYGSEM_HAL_DIAG_MANGLER_None)

    cyg_hal_diag_mangler_null_init();

#endif

#else // CYGDBG_HAL_DIAG_TO_DEBUG_CHAN

    // Use an actual (raw) IO channel

    CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL);

#endif // CYGDBG_HAL_DIAG_TO_DEBUG_CHAN

#endif // CYGSEM_HAL_VIRTUAL_VECTOR_INHERIT_CONSOLE

}

void

hal_if_diag_write_char(char c)

{

    hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_CONSOLE_PROCS();

    if (__chan)

        CYGACC_COMM_IF_PUTC(*__chan, c);

    else {

        __chan = CYGACC_CALL_IF_DEBUG_PROCS();

        // FIXME: What should be done if assertions are not enabled?

        // This is a bad bad situation - we have no means for diag

        // output; we want to hit a breakpoint to alert the developer

        // or something like that.

        CYG_ASSERT(__chan, "No valid channel set");

        CYGACC_COMM_IF_PUTC(*__chan, c);

    }

    // Check interrupt flag

    if (CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG()) {

        CYGACC_CALL_IF_CONSOLE_INTERRUPT_FLAG_SET(0);

        cyg_hal_user_break(0);

    }

}

void

hal_if_diag_read_char(char *c)

{

    hal_virtual_comm_table_t* __chan = CYGACC_CALL_IF_CONSOLE_PROCS();

    if (__chan)

        *c = CYGACC_COMM_IF_GETC(*__chan);

    else {

        __chan = CYGACC_CALL_IF_DEBUG_PROCS();