示例#1
0
文件: bspstart.c 项目: epicsdeb/rtems
void bsp_start(void)
{
  rtems_status_code sc = RTEMS_SUCCESSFUL;
  ppc_cpu_id_t myCpu;
  ppc_cpu_revision_t myCpuRevision;

  /* Set MPC8260ADS board LEDS and Uart enable lines */
  _BSP_GPLED0_off();
  _BSP_GPLED1_off();
  _BSP_Uart1_enable();
  _BSP_Uart2_enable();

  /*
   * Get CPU identification dynamically. Note that the get_ppc_cpu_type() function
   * store the result in global variables so that it can be used latter...
   */
  myCpu 	= get_ppc_cpu_type();
  myCpuRevision = get_ppc_cpu_revision();

  cpu_init();

/*
  mmu_init();
*/

  /* Initialize exception handler */
  /* FIXME: Interrupt stack begin and size */
  sc = ppc_exc_initialize(
    PPC_INTERRUPT_DISABLE_MASK_DEFAULT,
    (uintptr_t) IntrStack_start,
    (uintptr_t) intrStack - (uintptr_t) IntrStack_start
  );
  if (sc != RTEMS_SUCCESSFUL) {
    BSP_panic("cannot intitialize exceptions");
  }

  /* Initalize interrupt support */
  sc = bsp_interrupt_initialize();
  if (sc != RTEMS_SUCCESSFUL) {
    BSP_panic("cannot intitialize interrupts");
  }


/*
  mmu_init();
*/

  /*
   * Enable instruction and data caches. Do not force writethrough mode.
   */
#if INSTRUCTION_CACHE_ENABLE
  rtems_cache_enable_instruction();
#endif
#if DATA_CACHE_ENABLE
  rtems_cache_enable_data();
#endif

  /*
   *  initialize the device driver parameters
   */
  bsp_clicks_per_usec 	   = 10;  /* for 40MHz extclk */
  bsp_serial_per_sec  	   = 40000000;
  bsp_serial_external_clock  = 0;
  bsp_serial_xon_xoff 	   = 0;
  bsp_serial_cts_rts 	   = 0;
  bsp_serial_rate 	   = 9600;
  bsp_timer_average_overhead = 3;
  bsp_timer_least_valid 	   = 3;
  bsp_clock_speed 	   = 40000000;

#ifdef REV_0_2
  /* set up some board specific registers */
  m8260.siumcr &= 0xF3FFFFFF;		/* set TBEN ** BUG FIX ** */
  m8260.siumcr |= 0x08000000;
#endif

  /* use BRG1 to generate 32kHz timebase */
/*
  m8260.brgc1 = M8260_BRG_EN + (uint32_t)(((uint16_t)((40016384)/(32768)) - 1) << 1) + 0;
*/

#ifdef SHOW_MORE_INIT_SETTINGS
  printk("Exit from bspstart\n");
#endif

}
void bsp_start(void)
{
  extern void *_WorkspaceBase;
  ppc_cpu_id_t myCpu;
  ppc_cpu_revision_t myCpuRevision;
  register unsigned char* intrStack;

  /* Set MPC8260ADS board LEDS and Uart enable lines */
  _BSP_GPLED0_off();
  _BSP_GPLED1_off();
  _BSP_Uart1_enable();
  _BSP_Uart2_enable();

  /*
   * Get CPU identification dynamically. Note that the get_ppc_cpu_type() function
   * store the result in global variables so that it can be used latter...
   */
  myCpu 	= get_ppc_cpu_type();
  myCpuRevision = get_ppc_cpu_revision();

  cpu_init();

/*
  mmu_init();
*/
  /*
   * Initialize some SPRG registers related to irq handling
   */

  intrStack = (((unsigned char*)&intrStackPtr) - PPC_MINIMUM_STACK_FRAME_SIZE);
  _write_SPRG1((unsigned int)intrStack);
  /* signal that we have fixed PR288 - eventually, this should go away */
  _write_SPRG0(PPC_BSP_HAS_FIXED_PR288);

/*
  printk( "About to call initialize_exceptions\n" );
*/
   /*
    * Install our own set of exception vectors
    */

   initialize_exceptions();

/*
  mmu_init();
*/

  /*
   * Enable instruction and data caches. Do not force writethrough mode.
   */
#if INSTRUCTION_CACHE_ENABLE
  rtems_cache_enable_instruction();
#endif
#if DATA_CACHE_ENABLE
  rtems_cache_enable_data();
#endif

  /*
   *  Allocate the memory for the RTEMS Work Space.  This can come from
   *  a variety of places: hard coded address, malloc'ed from outside
   *  RTEMS world (e.g. simulator or primitive memory manager), or (as
   *  typically done by stock BSPs) by subtracting the required amount
   *  of work space from the last physical address on the CPU board.
   */

  /*
   *  Need to "allocate" the memory for the RTEMS Workspace and
   *  tell the RTEMS configuration where it is.  This memory is
   *  not malloc'ed.  It is just "pulled from the air".
   */

  BSP_Configuration.work_space_start = (void *)&_WorkspaceBase;

/*
  BSP_Configuration.microseconds_per_tick  = 1000;
*/

  /*
   *  initialize the CPU table for this BSP
   */

  Cpu_table.pretasking_hook = bsp_pretasking_hook;  /* init libc, etc. */
  Cpu_table.postdriver_hook = bsp_postdriver_hook;
  if( Cpu_table.interrupt_stack_size < 4*1024 )
    Cpu_table.interrupt_stack_size   = 4 * 1024;

  Cpu_table.clicks_per_usec 	   = 10;  /* for 40MHz extclk */
  Cpu_table.serial_per_sec  	   = 40000000;
  Cpu_table.serial_external_clock  = 0;
  Cpu_table.serial_xon_xoff 	   = 0;
  Cpu_table.serial_cts_rts 	   = 0;
  Cpu_table.serial_rate 	   = 9600;
  Cpu_table.timer_average_overhead = 3;
  Cpu_table.timer_least_valid 	   = 3;
  Cpu_table.clock_speed 	   = 40000000;

#ifdef REV_0_2
  /* set up some board specific registers */
  m8260.siumcr &= 0xF3FFFFFF;		/* set TBEN ** BUG FIX ** */
  m8260.siumcr |= 0x08000000;
#endif

  /* use BRG1 to generate 32kHz timebase */
/*
  m8260.brgc1 = M8260_BRG_EN + (uint32_t)(((uint16_t)((40016384)/(32768)) - 1) << 1) + 0;
*/

  /*
   * Initalize RTEMS IRQ system
   */
  BSP_rtems_irq_mng_init(0);

  /*
   * Call this in case we use TERMIOS for console I/O
   */

  m8xx_uart_reserve_resources(&BSP_Configuration);

/*
  rtems_termios_initialize();
*/
#ifdef SHOW_MORE_INIT_SETTINGS
  printk("Exit from bspstart\n");
#endif

}