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

//

//      plf_misc.c

//

//      HAL platform miscellaneous functions

//

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

//####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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// 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

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

//

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// 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

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//####ECOSGPLCOPYRIGHTEND####

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

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

//

// Author(s):    nickg

// Contributors: nickg, jlarmour

// Date:         1999-01-21

// Purpose:      HAL miscellaneous functions

// Description:  This file contains miscellaneous functions provided by the

//               HAL.

//

//####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_arch.h>           // architectural definitions

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

#include <cyg/hal/hal_cache.h>          // Cache handling

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

void hal_platform_init(void)

{

    // Note that the hardware seems to come up with the

    // caches containing random data. Hence they must be

    // invalidated before being enabled.

    HAL_ICACHE_INVALIDATE_ALL();

    HAL_ICACHE_ENABLE();

    HAL_DCACHE_INVALIDATE_ALL();

    HAL_DCACHE_ENABLE();

#if defined(CYGPKG_KERNEL)                      && \

    defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT)   && \

    defined(CYGSEM_HAL_USE_ROM_MONITOR_CygMon)

    {

        extern CYG_ADDRESS hal_virtual_vector_table[32];

        extern void patch_dbg_syscalls(void * vector);

        patch_dbg_syscalls( (void *)(&hal_virtual_vector_table[0]) );

    }

#endif    

}

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

/* Functions to support the detection and execution of a user provoked    */

/* program break. These are usually called from interrupt routines.       */

cyg_bool cyg_hal_is_break(char *buf, int size)

{

    while( size )

        if( buf[--size] == 0x03 ) return true;

    return false;

}

void cyg_hal_user_break( CYG_ADDRWORD *regs )

{

#if defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs)

        {

            extern CYG_ADDRESS hal_virtual_vector_table[64];

            typedef void install_bpt_fn(void *pc);

            CYG_WORD32 retpc = ((CYG_WORD32 *)(&regs))[-1];

            CYG_WORD32 pc;

            HAL_SavedRegisters *sreg = (HAL_SavedRegisters *)regs;

            install_bpt_fn *ibp = (install_bpt_fn *)hal_virtual_vector_table[35];

            if( regs == NULL ) pc = retpc;

            else pc = sreg->pc;

            if( ibp != NULL ) ibp((void *)pc);

        }

#elif defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)

    {

        extern void breakpoint(void);

        breakpoint();

    }

#else

    HAL_BREAKPOINT(breakinst);

#endif

}

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

/* Control C ISR support                                                  */

#if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)

struct Hal_SavedRegisters *hal_saved_interrupt_state;

static void hal_ctrlc_isr_init(void)

{

}

cyg_uint32 hal_ctrlc_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)

{

//    char c;

    HAL_INTERRUPT_ACKNOWLEDGE( CYGHWR_HAL_GDB_PORT_VECTOR );

    return 2;

}

#endif

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

/* End of plf_misc.c                                                      */