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

//

//      hal_priv.c

//

//      SPARClite Architecture sim-specific private variables

//

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

// ####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):   hmt

// Contributors:hmt

// Date:        1998-12-10

// Purpose:     private vars for SPARClite sim.

//              

//####DESCRIPTIONEND####

//

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

#include <pkgconf/system.h>

#include <pkgconf/hal.h>

#include <pkgconf/hal_sparclite.h>

#include <pkgconf/hal_sparclite_sleb.h>

#include <cyg/infra/cyg_type.h>

#include <cyg/hal/hal_intr.h>

#include <cyg/hal/hal_arch.h>

#ifdef CYGPKG_KERNEL

#include <pkgconf/kernel.h> // CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT

#endif

#include <cyg/hal/hal_clock.h>

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

// Clock static to keep period recorded.

cyg_int32 cyg_hal_sparclite_clock_period = 0;

/* Address of clock switch */

#define CLKSW_ADDR  0x01000003

#define HAL_SPARC_86940_TIMER1_CONTROL_INIT ( \

                HAL_SPARC_86940_TCR_CLKPRS |  \

                HAL_SPARC_86940_TCR_OUTLOW   )

                // Disable, CLKSEL=prescale(2), periodic interrupts, gate 0

                // and lower the output: OUTCTL = 2

#define HAL_SPARC_86940_TIMER1_CONTROL_ENABLE ( \

                HAL_SPARC_86940_TCR_CE |        \

                HAL_SPARC_86940_TCR_CLKPRS |    \

                HAL_SPARC_86940_TCR_OUTSAME   )

                // Enable + .... and no change to the output: OUTCTL = 0

void hal_clock_initialize( cyg_uint32 p )

{

    cyg_uint32 ints;

    cyg_uint32 clk;

    HAL_DISABLE_INTERRUPTS( ints );

    HAL_SPARC_86940_TIMER1_CONTROL_WRITE(

       HAL_SPARC_86940_TIMER1_CONTROL_INIT ); // Make sure it's disabled

    // Clear any pending interrupts:

    HAL_INTERRUPT_ACKNOWLEDGE( CYGNUM_HAL_INTERRUPT_RTC );

    clk = *(unsigned char *)CLKSW_ADDR;

    if (clk & 0x80)

        clk = 10;

    /* could be 10 - 62 MHz */

    clk = (clk & 0x3f);  /* in MHz */

    // BUT the 86940 is internally clocked at half that speed (page 20 RHS)

    clk >>= 1;

    // so the clock is now the number of system ticks we want per counter

    // tick...

    HAL_SPARC_86940_TIMER1_PRESCALER_WRITE(

        HAL_SPARC_86940_PRS_ODIV1 |

        clk );

    // should give 1MHz on the externally visible counter...

    HAL_SPARC_86940_TIMER1_CONTROL_WRITE(

                             HAL_SPARC_86940_TIMER1_CONTROL_INIT );

    HAL_SPARC_86940_TIMER1_RELOAD_WRITE( p );

    HAL_SPARC_86940_TIMER1_CONTROL_WRITE(

                             HAL_SPARC_86940_TIMER1_CONTROL_ENABLE );

    HAL_SPARC_86940_TIMER1_RELOAD_WRITE( p );

    cyg_hal_sparclite_clock_period = p;

    HAL_RESTORE_INTERRUPTS( ints );

}

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

#ifdef CYG_HAL_USE_ROM_MONITOR_CYGMON

#include <cyg/hal/hal_cygm.h>           // CygMon vector table & layout

static struct { int eCosV, CygMonV; } setup[] = {

    { CYGNUM_HAL_VECTOR_OTHERS                , BSP_EXC_TRAP               },

    { CYGNUM_HAL_VECTOR_FETCH_ABORT           , BSP_EXC_IACCESS            },

    { CYGNUM_HAL_VECTOR_ILLEGAL_OP            , BSP_EXC_ILL                },

    { CYGNUM_HAL_VECTOR_PRIV_OP               , BSP_EXC_IPRIV              },

    { CYGNUM_HAL_VECTOR_UNALIGNED             , BSP_EXC_ALIGN              },

    { CYGNUM_HAL_VECTOR_DATA_ABORT            , BSP_EXC_DACCESS            },

};

#endif // CYG_HAL_USE_ROM_MONITOR_CYGMON

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

// Board specific startups.

extern void hal_board_prestart( void );

extern void hal_board_poststart( void );

#define SLEB_LED (*(volatile char *)(0x02000003))

#define LED( _x_ ) SLEB_LED = (char)(0xff & ~(_x_))

void hal_board_prestart( void )

{

    LED( 0xc0 );

    // Disable default clocks &c

    HAL_SPARC_86940_TIMER1_PRESCALER_WRITE( 1 ); // as if at reset

    HAL_SPARC_86940_TIMER1_CONTROL_WRITE( 0 );   // as if at reset

#ifdef CYG_HAL_USE_ROM_MONITOR_CYGMON

    // then initialize our vectors to point to (or bounce to)

    // CygMon's equivalent functionality.

    {

        extern void hal_user_trap_to_cygmon_vsr( void );

        extern void hal_nofpcp_trap_to_cygmon_vsr( void );

        extern void hal_nmi_handler( void );

        int i;

        HAL_VSR_SET( CYGNUM_HAL_VECTOR_USER_TRAP,

                     (CYG_ADDRESS)hal_user_trap_to_cygmon_vsr, NULL );

        HAL_VSR_SET( CYGNUM_HAL_VECTOR_NOFPCP,

                     (CYG_ADDRESS)hal_nofpcp_trap_to_cygmon_vsr, NULL );

        for ( i = 0; i < sizeof(setup)/sizeof(setup[0]); i++ )

            HAL_VSR_SET( setup[i].eCosV,

                         CYGMON_VECTOR_TABLE[ setup[i].CygMonV ], NULL );

        // Just point this one straight though, and unmask it.

        // That way CygMon looks after ^Cs itself.

        HAL_VSR_SET( CYGNUM_HAL_VECTOR_INTERRUPT_10,

                     CYGMON_VECTOR_TABLE[ BSP_EXC_INT10 ], NULL );

        HAL_INTERRUPT_UNMASK( CYGNUM_HAL_VECTOR_INTERRUPT_10 );

        // Just point this one straight though, and unmask it.

        // That way CygMon looks after the Ethernet itself.

        HAL_VSR_SET( CYGNUM_HAL_VECTOR_INTERRUPT_14,

                     CYGMON_VECTOR_TABLE[ BSP_EXC_INT14 ], NULL );

        HAL_INTERRUPT_UNMASK( CYGNUM_HAL_VECTOR_INTERRUPT_14 );

        // Install handler for the NMI button on the board

        HAL_VSR_SET( CYGNUM_HAL_VECTOR_INTERRUPT_15,

                     (CYG_ADDRESS)hal_nmi_handler, NULL );

        HAL_INTERRUPT_UNMASK( CYGNUM_HAL_VECTOR_INTERRUPT_15 );

        LED( 0xc4 );

#ifdef CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT

        {

            extern void patch_dbg_syscalls(void * vector);

            patch_dbg_syscalls( (void *)CYGMON_VECTOR_TABLE );

        }

#endif // CYGDBG_KERNEL_DEBUG_GDB_THREAD_SUPPORT

    }

#endif // CYG_HAL_USE_ROM_MONITOR_CYGMON

    LED( 0xc8 );

}

void hal_board_poststart( void )

{

    LED( 0xe0 );

    HAL_ENABLE_INTERRUPTS();

    LED( 0xf0 );

}

// EOF hal_priv.c