source: rtems/c/src/lib/libbsp/mips/genmongoosev/startup/bspstart.c @ 9099a85

/*
**  This routine starts the application.  It includes application,
**  board, and monitor specific initialization and configuration.
**  The generic CPU dependent initialization has been performed
**  before this routine is invoked.
**
**  COPYRIGHT (c) 1989-2001.
**  On-Line Applications Research Corporation (OAR).
**
**  The license and distribution terms for this file may be
**  found in the file LICENSE in this distribution or at
**  http://www.OARcorp.com/rtems/license.html.
**
**  $Id$
**
** Modification History:
**        12/10/01  A.Ferrer, NASA/GSFC, Code 582
**           Set interrupt mask to 0xAF00 (Line 139).
*/

#include <string.h>

#include <bsp.h>
#include <rtems/libio.h>
#include <rtems/libcsupport.h>
#include <libcpu/mongoose-v.h>



/*
 *  The original table from the application and our copy of it with
 *  some changes.
 */

extern rtems_configuration_table Configuration;

rtems_configuration_table  BSP_Configuration;

rtems_cpu_table Cpu_table;

char *rtems_progname;

/*
 *  Use the shared implementations of the following routines
 */

void bsp_postdriver_hook(void);
void bsp_libc_init( void *, unsigned32, int );

/*
 *  Function:   bsp_pretasking_hook
 *  Created:    95/03/10
 *
 *  Description:
 *      BSP pretasking hook.  Called just before drivers are initialized.
 *      Used to setup libc and install any BSP extensions.
 *
 *  NOTES:
 *      Must not use libc (to do io) from here, since drivers are
 *      not yet initialized.
 *
 */

void bsp_pretasking_hook(void)
{
    extern int HeapBase;
    extern int HeapSize;
    void         *heapStart = &HeapBase;
    unsigned long heapSize = (unsigned long)&HeapSize;
    unsigned long ramSpace;

    bsp_libc_init(heapStart, (unsigned32) heapSize, 0);

#ifdef RTEMS_DEBUG
    rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
#endif

}



/*
 *  bsp_start
 *
 *  This routine does the bulk of the system initialization.
 */

void bsp_start( void )
{
  extern int WorkspaceBase;
  extern void mips_install_isr_entries();

  /* Configure Number of Register Caches */

  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
  Cpu_table.postdriver_hook = bsp_postdriver_hook;
  Cpu_table.interrupt_stack_size = 4096;

  /* HACK -- tied to value linkcmds */
  if ( BSP_Configuration.work_space_size > (4096*1024) )
     _sys_exit( 1 );

  BSP_Configuration.work_space_start = (void *) &WorkspaceBase;

  /* mask off any interrupts */
  MONGOOSEV_WRITE( MONGOOSEV_PERIPHERAL_FUNCTION_INTERRUPT_MASK_REGISTER, 0 );

  MONGOOSEV_WRITE( MONGOOSEV_WATCHDOG, 0xA0 );

  /* reset the config register & clear any pending peripheral interrupts */
  MONGOOSEV_WRITE( MONGOOSEV_PERIPHERAL_COMMAND_REGISTER, 0 );
  MONGOOSEV_WRITE( MONGOOSEV_PERIPHERAL_COMMAND_REGISTER, MONGOOSEV_UART_CMD_RESET_BOTH_PORTS );
  MONGOOSEV_WRITE( MONGOOSEV_PERIPHERAL_COMMAND_REGISTER, 0 );

  /* reset both timers */
  MONGOOSEV_WRITE_REGISTER( MONGOOSEV_TIMER1_BASE, MONGOOSEV_TIMER_INITIAL_COUNTER_REGISTER, 0xffffffff );
  MONGOOSEV_WRITE_REGISTER( MONGOOSEV_TIMER1_BASE, MONGOOSEV_TIMER_CONTROL_REGISTER, 0);

  MONGOOSEV_WRITE_REGISTER( MONGOOSEV_TIMER2_BASE, MONGOOSEV_TIMER_INITIAL_COUNTER_REGISTER, 0xffffffff );
  MONGOOSEV_WRITE_REGISTER( MONGOOSEV_TIMER2_BASE, MONGOOSEV_TIMER_CONTROL_REGISTER, 0);

  /* clear any pending interrupts */
  MONGOOSEV_WRITE( MONGOOSEV_PERIPHERAL_STATUS_REGISTER, 0xffffffff );

  /* clear any writable bits in the cause register */
  mips_set_cause( 0 );

  /* set interrupt mask, but globally off. */

  /*
  **  Bit 15 | Bit 14 | Bit 13 | Bit 12 | Bit 11 | Bit 10 | Bit  9 | Bit  8 |
  **  periph | unused |  FPU   | unused | timer2 | timer1 | swint1 | swint2 |
  **  extern |        |        |        |        |        |        |        |
  **
  **    1        0        1        0        0        1        0        0
  **
  **    0x8C00   Enable only internal Mongoose V timers.
  **    0xA400   Enable Peripherial ints, FPU and timer1
  */

  mips_set_sr( (SR_CU0 | SR_CU1 | 0xA400) );

  mips_install_isr_entries();
}


void clear_cache( void *address, size_t n )
{
}

/* Structure filled in by get_mem_info.  Only the size field is
   actually used (to clear bss), so the others aren't even filled in.  */

struct s_mem
{
  unsigned int size;
  unsigned int icsize;
  unsigned int dcsize;
};



extern unsigned32 _RamSize;

void get_mem_info ( struct s_mem *mem )
{
   mem->size = (unsigned32)&_RamSize;
}