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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [hal/] [mips/] [jmr3904/] [v2_0/] [src/] [plf_misc.c] - Blame information for rev 27

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//==========================================================================
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//
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//      plf_misc.c
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//
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//      HAL platform miscellaneous functions
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//
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//==========================================================================
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//####ECOSGPLCOPYRIGHTBEGIN####
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// -------------------------------------------
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// This file is part of eCos, the Embedded Configurable Operating System.
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// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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//
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// eCos is free software; you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// Software Foundation; either version 2 or (at your option) any later version.
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//
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// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with eCos; if not, write to the Free Software Foundation, Inc.,
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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//
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// As a special exception, if other files instantiate templates or use macros
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// or inline functions from this file, or you compile this file and link it
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// with other works to produce a work based on this file, this file does not
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// by itself cause the resulting work to be covered by the GNU General Public
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// License. However the source code for this file must still be made available
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// in accordance with section (3) of the GNU General Public License.
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//
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// This exception does not invalidate any other reasons why a work based on
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// this file might be covered by the GNU General Public License.
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//
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// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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// at http://sources.redhat.com/ecos/ecos-license/
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// -------------------------------------------
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//####ECOSGPLCOPYRIGHTEND####
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//==========================================================================
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//#####DESCRIPTIONBEGIN####
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//
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// Author(s):    nickg
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// Contributors: nickg, jlarmour
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// Date:         1999-01-21
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// Purpose:      HAL miscellaneous functions
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// Description:  This file contains miscellaneous functions provided by the
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//               HAL.
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//
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//####DESCRIPTIONEND####
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//
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//========================================================================*/
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#include <pkgconf/hal.h>
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#include <cyg/infra/cyg_type.h>         // Base types
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#include <cyg/infra/cyg_trac.h>         // tracing macros
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#include <cyg/infra/cyg_ass.h>          // assertion macros
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#include <cyg/hal/hal_arch.h>           // architectural definitions
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#include <cyg/hal/hal_intr.h>           // Interrupt handling
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#include <cyg/hal/hal_cache.h>          // Cache handling
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/*------------------------------------------------------------------------*/
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extern void patch_dbg_syscalls(void * vector);
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/*------------------------------------------------------------------------*/
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void hal_platform_init(void)
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{
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    HAL_ICACHE_INVALIDATE_ALL();
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    HAL_ICACHE_ENABLE();
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    HAL_DCACHE_INVALIDATE_ALL();
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    HAL_DCACHE_ENABLE();
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#if !defined(CYGHWR_HAL_MIPS_TX39_JMR3904_ENABLE_TOE)
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    HAL_TX39_DEBUG_TOE_DISABLE();
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#else
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    HAL_TX39_DEBUG_TOE_ENABLE();
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#endif
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#if defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT)   && \
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    defined(CYGSEM_HAL_USE_ROM_MONITOR_CygMon)
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    {
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        patch_dbg_syscalls( (void *)(&hal_vsr_table[0]) );
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    }
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#endif
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}
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/*------------------------------------------------------------------------*/
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/* Functions to support the detection and execution of a user provoked    */
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/* program break. These are usually called from interrupt routines.       */
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cyg_bool cyg_hal_is_break(char *buf, int size)
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{
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    while( size )
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        if( buf[--size] == 0x03 ) return true;
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    return false;
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}
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void cyg_hal_user_break( CYG_ADDRWORD *regs )
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{
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#if defined(CYGSEM_HAL_USE_ROM_MONITOR_CygMon)
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    // The following code should be at the very start of this function so
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    // that it can access the RA register before it is saved and reused.
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    register CYG_WORD32 ra;
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    asm volatile ( "move %0,$31;" : "=r" (ra) );
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        {
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            typedef void install_bpt_fn(void *epc);
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            CYG_WORD32 pc;
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            HAL_SavedRegisters *sreg = (HAL_SavedRegisters *)regs;
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            install_bpt_fn *ibp = (install_bpt_fn *)hal_vsr_table[35];
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            if( regs == NULL ) pc = ra;
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            else pc = sreg->pc;
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            if( ibp != NULL ) ibp((void *)pc);
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        }
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#elif defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
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        {
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            extern void breakpoint(void);
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            breakpoint();
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        }
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#else
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        HAL_BREAKPOINT(breakinst);
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#endif
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}
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/*------------------------------------------------------------------------*/
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/* Control C ISR support                                                  */
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#if defined(CYGDBG_HAL_MIPS_DEBUG_GDB_CTRLC_SUPPORT)
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#define DIAG_BASE       0xfffff300
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#define DIAG_SLCR       (DIAG_BASE+0x00)
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#define DIAG_SLSR       (DIAG_BASE+0x04)
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#define DIAG_SLDICR     (DIAG_BASE+0x08)
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#define DIAG_SLDISR     (DIAG_BASE+0x0C)
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#define DIAG_SFCR       (DIAG_BASE+0x10)
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#define DIAG_SBRG       (DIAG_BASE+0x14)
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#define DIAG_TFIFO      (DIAG_BASE+0x20)
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#define DIAG_RFIFO      (DIAG_BASE+0x30)
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#define BRG_T0          0x0000
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#define BRG_T2          0x0100
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#define BRG_T4          0x0200
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#define BRG_T5          0x0300
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struct Hal_SavedRegisters *hal_saved_interrupt_state;
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void hal_ctrlc_isr_init(void)
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{
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    CYG_WORD16 dicr;
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    HAL_READ_UINT16( DIAG_SLDICR , dicr );
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    dicr = 0x0001;
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    HAL_WRITE_UINT16( DIAG_SLDICR , dicr );
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    HAL_INTERRUPT_SET_LEVEL( CYGHWR_HAL_GDB_PORT_VECTOR, 1 );
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    HAL_INTERRUPT_UNMASK( CYGHWR_HAL_GDB_PORT_VECTOR );
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}
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cyg_uint32 hal_ctrlc_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
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{
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    char c;
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    CYG_WORD16 disr;
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    HAL_INTERRUPT_ACKNOWLEDGE( CYGHWR_HAL_GDB_PORT_VECTOR );
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    HAL_READ_UINT16( DIAG_SLDISR , disr );
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    if( disr & 0x0001 )
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    {
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        disr = disr & ~0x0001;
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        HAL_READ_UINT8( DIAG_RFIFO, c );
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        HAL_WRITE_UINT16( DIAG_SLDISR , disr );
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        if( cyg_hal_is_break( &c , 1 ) )
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            cyg_hal_user_break( (CYG_ADDRWORD *)hal_saved_interrupt_state );
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    }
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    return 2;
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}
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#endif
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/*------------------------------------------------------------------------*/
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/* End of plf_misc.c                                                      */

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