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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.
//
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// for more details.
//
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//
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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                                                      */