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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 Free Software Foundation, 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
// 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.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####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
/*------------------------------------------------------------------------*/
extern void patch_dbg_syscalls(void * vector);
/*------------------------------------------------------------------------*/
void hal_platform_init(void)
{
HAL_ICACHE_INVALIDATE_ALL();
HAL_ICACHE_ENABLE();
HAL_DCACHE_INVALIDATE_ALL();
HAL_DCACHE_ENABLE();
#if !defined(CYGHWR_HAL_MIPS_TX39_JMR3904_ENABLE_TOE)
HAL_TX39_DEBUG_TOE_DISABLE();
#else
HAL_TX39_DEBUG_TOE_ENABLE();
#endif
#if defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT) && \
defined(CYGSEM_HAL_USE_ROM_MONITOR_CygMon)
{
patch_dbg_syscalls( (void *)(&hal_vsr_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_CygMon)
// The following code should be at the very start of this function so
// that it can access the RA register before it is saved and reused.
register CYG_WORD32 ra;
asm volatile ( "move %0,$31;" : "=r" (ra) );
{
typedef void install_bpt_fn(void *epc);
CYG_WORD32 pc;
HAL_SavedRegisters *sreg = (HAL_SavedRegisters *)regs;
install_bpt_fn *ibp = (install_bpt_fn *)hal_vsr_table[35];
if( regs == NULL ) pc = ra;
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_MIPS_DEBUG_GDB_CTRLC_SUPPORT)
#define DIAG_BASE 0xfffff300
#define DIAG_SLCR (DIAG_BASE+0x00)
#define DIAG_SLSR (DIAG_BASE+0x04)
#define DIAG_SLDICR (DIAG_BASE+0x08)
#define DIAG_SLDISR (DIAG_BASE+0x0C)
#define DIAG_SFCR (DIAG_BASE+0x10)
#define DIAG_SBRG (DIAG_BASE+0x14)
#define DIAG_TFIFO (DIAG_BASE+0x20)
#define DIAG_RFIFO (DIAG_BASE+0x30)
#define BRG_T0 0x0000
#define BRG_T2 0x0100
#define BRG_T4 0x0200
#define BRG_T5 0x0300
struct Hal_SavedRegisters *hal_saved_interrupt_state;
void hal_ctrlc_isr_init(void)
{
CYG_WORD16 dicr;
HAL_READ_UINT16( DIAG_SLDICR , dicr );
dicr = 0x0001;
HAL_WRITE_UINT16( DIAG_SLDICR , dicr );
HAL_INTERRUPT_SET_LEVEL( CYGHWR_HAL_GDB_PORT_VECTOR, 1 );
HAL_INTERRUPT_UNMASK( CYGHWR_HAL_GDB_PORT_VECTOR );
}
cyg_uint32 hal_ctrlc_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
{
char c;
CYG_WORD16 disr;
HAL_INTERRUPT_ACKNOWLEDGE( CYGHWR_HAL_GDB_PORT_VECTOR );
HAL_READ_UINT16( DIAG_SLDISR , disr );
if( disr & 0x0001 )
{
disr = disr & ~0x0001;
HAL_READ_UINT8( DIAG_RFIFO, c );
HAL_WRITE_UINT16( DIAG_SLDISR , disr );
if( cyg_hal_is_break( &c , 1 ) )
cyg_hal_user_break( (CYG_ADDRWORD *)hal_saved_interrupt_state );
}
return 2;
}
#endif
/*------------------------------------------------------------------------*/
/* End of plf_misc.c */
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