C++ rtems_interrupt_enable函数代码示例

/* i2c_transfer --
 *     Initiate multiple-messages transfer over specified I2C bus or
 *     put request into queue if bus or some other resource is busy. (This
 *     is non-blocking function).
 *
 * PARAMETERS:
 *     bus - I2C bus number
 *     nmsg - number of messages
 *     msg - pointer to messages array
 *     done - function which is called when transfer is finished
 *     done_arg_ptr - arbitrary argument pointer passed to done funciton
 *
 * RETURNS:
 *     RTEMS_SUCCESSFUL if transfer initiated successfully, or error
 *     code if something failed.
 */
rtems_status_code
i2c_transfer(i2c_bus_number bus, int nmsg, i2c_message *msg,
             i2c_transfer_done done, void *     done_arg_ptr)
{
    i2c_qel qel;
    rtems_interrupt_level level;

    if (bus >= I2C_NUMBER_OF_BUSES)
    {
        return RTEMS_INVALID_NUMBER;
    }

    if (msg == NULL)
    {
        return RTEMS_INVALID_ADDRESS;
    }

    qel.bus = bus;
    qel.msg = msg;
    qel.nmsg = nmsg;
    qel.done = done;
    qel.done_arg_ptr = done_arg_ptr;
    rtems_interrupt_disable(level);
    if ((tqueue_head + 1) % tqueue_size == tqueue_tail)
    {
        rtems_interrupt_enable(level);
        return RTEMS_TOO_MANY;
    }
    memcpy(tqueue + tqueue_head, &qel, sizeof(qel));
    tqueue_head = (tqueue_head + 1) % tqueue_size;
    rtems_interrupt_enable(level);
    i2cdrv_unload();
    return RTEMS_SUCCESSFUL;
}

/*
 * Send characters to device-specific code
 */
void
rtems_termios_puts (
  const void *_buf, int len, struct rtems_termios_tty *tty)
{
	const unsigned char *buf = _buf;
	unsigned int newHead;
	rtems_interrupt_level level;
	rtems_status_code sc;

	if (tty->device.outputUsesInterrupts == TERMIOS_POLLED) {
		(*tty->device.write)(tty->minor, (void *)buf, len);
		return;
	}
	newHead = tty->rawOutBuf.Head;
	while (len) {
		/*
		 * Performance improvement could be made here.
		 * Copy multiple bytes to raw buffer:
		 * if (len > 1) && (space to buffer end, or tail > 1)
		 *	ncopy = MIN (len, space to buffer end or tail)
		 *	memcpy (raw buffer, buf, ncopy)
		 *	buf += ncopy
		 *	len -= ncopy
		 *
		 * To minimize latency, the memcpy should be done
		 * with interrupts enabled.
		 */
		newHead = (newHead + 1) % tty->rawOutBuf.Size;
		rtems_interrupt_disable (level);
		while (newHead == tty->rawOutBuf.Tail) {
			tty->rawOutBufState = rob_wait;
			rtems_interrupt_enable (level);
			sc = rtems_semaphore_obtain (tty->rawOutBuf.Semaphore,
							RTEMS_WAIT,
							RTEMS_NO_TIMEOUT);
			if (sc != RTEMS_SUCCESSFUL)
				rtems_fatal_error_occurred (sc);
			rtems_interrupt_disable (level);
		}
		tty->rawOutBuf.theBuf[tty->rawOutBuf.Head] = *buf++;
		tty->rawOutBuf.Head = newHead;
		if (tty->rawOutBufState == rob_idle) {
		  /* check, whether XOFF has been received */
		  if (!(tty->flow_ctrl & FL_ORCVXOF)) {
		    (*tty->device.write)(tty->minor,
			(char *)&tty->rawOutBuf.theBuf[tty->rawOutBuf.Tail],1);
		  }
		  else {
		    /* remember that output has been stopped due to flow ctrl*/
		    tty->flow_ctrl |= FL_OSTOP;
		  }
		  tty->rawOutBufState = rob_busy;
		}
		rtems_interrupt_enable (level);
		len--;
	}
}

static rtems_task ppp_rxdaemon(rtems_task_argument arg)
{
  rtems_event_set             events;
  rtems_interrupt_level       level;
  struct ppp_softc           *sc = (struct ppp_softc *)arg;
  struct mbuf                *mp = (struct mbuf      *)0;
  struct mbuf                *m;

  /* enter processing loop */
  while ( 1 ) {
    /* wait for event */
    rtems_event_receive(RX_PACKET|RX_MBUF|RX_EMPTY,RTEMS_WAIT|RTEMS_EVENT_ANY,RTEMS_NO_TIMEOUT,&events);
    if ( events & RX_EMPTY ) {
      printf("RX: QUEUE is EMPTY\n");
      events &= ~RX_EMPTY;
    }

    if ( events ) {
      /* get the network semaphore */
      rtems_bsdnet_semaphore_obtain();

      /* check to see if new packet was received */
      if ( events & RX_PACKET ) {
        /* get received packet mbuf chain */
        rtems_interrupt_disable(level);
        IF_DEQUEUE(&sc->sc_rawq, m);
        rtems_interrupt_enable(level);

        /* ensure packet was retrieved */
        if ( m != (struct mbuf *)0 ) {
          /* process the received packet */
          mp = ppp_inproc(sc, m);
        }
      }

      /* allocate a new mbuf to replace one */
      if ( mp == NULL ) {
        pppallocmbuf(sc, &mp);
      }

      /* place mbuf on freeq */
      rtems_interrupt_disable(level);
      IF_ENQUEUE(&sc->sc_freeq, mp);
      rtems_interrupt_enable(level);
      mp = (struct mbuf *)0;

      /* release the network semaphore */
      rtems_bsdnet_semaphore_release();

      /* check to see if queue is empty */
      if ( sc->sc_rawq.ifq_head ) {
        /* queue is not empty - post another event */
        rtems_event_send(sc->sc_rxtask, RX_PACKET);
      }
    }
  }
}

int BSP_install_rtems_irq_handler  (const rtems_irq_connect_data* irq)
{
    rtems_interrupt_level       level;

printk(" BSP_install_rtems_irq_handler %d\n", irq->name );

    if (!isValidInterrupt(irq->name)) {
      printk("Invalid interrupt vector %d\n",irq->name);
      return 0;
    }
    /*
     * Check if default handler is actually connected. If not issue an error.
     * You must first get the current handler via i386_get_current_idt_entry
     * and then disconnect it using i386_delete_idt_entry.
     * RATIONALE : to always have the same transition by forcing the user
     * to get the previous handler before accepting to disconnect.
     */
    rtems_interrupt_disable(level);
    if (rtems_hdl_tbl[irq->name].hdl != default_rtems_entry.hdl) {
      rtems_interrupt_enable(level);
      printk("IRQ vector %d already connected\n",irq->name);
      return 0;
    }

    /*
     * store the data provided by user
     */
    rtems_hdl_tbl[irq->name] = *irq;
    rtems_hdl_tbl[irq->name].next_handler = (void *)-1;

    /* XXX -FIX ME !! */
    if (is_pci_irq(irq->name)) {
      /*
       * Enable interrupt
       */
      printk("is_pci_irq = TRUE - FIX THIS!\n");
    }

    if (is_processor_irq(irq->name)) {
      /*
       * Enable exception at processor level
       */
      printk("is_processor_irq = TRUE : Fix This\n");
    }

    /*
     * Enable interrupt on device
     */
    if (irq->on) {
        printk("Call 0x%x\n", irq->on );
    	irq->on(irq);
    }

    rtems_interrupt_enable(level);

    return 1;
}

/*
 * ------------------------ RTEMS Shared Irq Handler Mngt Routines ----------------
 */
int BSP_install_rtems_shared_irq_handler  (const rtems_irq_connect_data* irq)
{
    rtems_interrupt_level   level;
    rtems_irq_connect_data* vchain;

printk(" BSP_install_rtems_shared_irq_handler %d\n", irq->name );

    if (!isValidInterrupt(irq->name)) {
      printk("Invalid interrupt vector %d\n",irq->name);
      return 0;
    }

    rtems_interrupt_disable(level);

    if ( (int)rtems_hdl_tbl[irq->name].next_handler  == -1 ) {
      rtems_interrupt_enable(level);
      printk("IRQ vector %d already connected to an unshared handler\n",irq->name);
      return 0;
    }

     vchain = (rtems_irq_connect_data*)malloc(sizeof(rtems_irq_connect_data));

    /* save off topmost handler */
    vchain[0]= rtems_hdl_tbl[irq->name];

    /*
     * store the data provided by user
     */
    rtems_hdl_tbl[irq->name] = *irq;

    /* link chain to new topmost handler */
    rtems_hdl_tbl[irq->name].next_handler = (void *)vchain;

    /*
     * XXX FIX ME
     */
    if (is_pci_irq(irq->name)) {
    }

    if (is_processor_irq(irq->name)) {
      /*
       * Enable exception at processor level
       */
    }
    /*
     * Enable interrupt on device
     */
	if (irq->on)
    	irq->on(irq);

    rtems_interrupt_enable(level);

    return 1;
}

rtems_status_code mpc83xx_ipic_set_mask(
  rtems_vector_number vector,
  rtems_vector_number mask_vector,
  bool mask
)
{
  uint8_t pos = 0;
  mpc83xx_ipic_mask_t *mask_entry;
  uint32_t *mask_reg;
  rtems_interrupt_level level;

  /* Parameter check */
  if (!MPC83XX_IPIC_IS_VALID_VECTOR( vector) ||
      !MPC83XX_IPIC_IS_VALID_VECTOR( mask_vector)) {
    return RTEMS_INVALID_NUMBER;
  } else if (vector == mask_vector) {
    return RTEMS_RESOURCE_IN_USE;
  }

  /* Position and mask entry */
  pos = mpc83xx_ipic_mask_position_table [mask_vector];
  mask_entry = &mpc83xx_ipic_prio2mask [vector];

  /* Mask register and position */
  if (pos < 32) {
    mask_reg = &mask_entry->simsr_mask [0];
  } else if (pos < 64) {
    pos -= 32;
    mask_reg = &mask_entry->simsr_mask [1];
  } else if (pos < 96) {
    pos -= 64;
    mask_reg = &mask_entry->semsr_mask;
  } else if (pos < 128) {
    pos -= 96;
    mask_reg = &mask_entry->sermr_mask;
  } else {
    return RTEMS_NOT_IMPLEMENTED;
  }

  /* Mask or unmask */
  if (mask) {
    rtems_interrupt_disable( level);
    *mask_reg &= ~(1 << pos);
    rtems_interrupt_enable( level);
  } else {
    rtems_interrupt_disable( level);
    *mask_reg |= 1 << pos;
    rtems_interrupt_enable( level);
  }

  return RTEMS_SUCCESSFUL;
}

/*
 * ------------------------ RTEMS Shared Irq Handler Mngt Routines ----------------
 */
int BSP_install_rtems_shared_irq_handler  (const rtems_irq_connect_data* irq)
{
    rtems_interrupt_level   level;
    rtems_irq_connect_data* vchain;

    if (!isValidInterrupt(irq->name)) {
      printk("Invalid interrupt vector %d\n",irq->name);
      return 0;
    }

	/* pre-allocate memory outside of critical section */
    vchain = (rtems_irq_connect_data*)malloc(sizeof(rtems_irq_connect_data));

    rtems_interrupt_disable(level);

    if ( (int)rtems_hdl_tbl[irq->name].next_handler  == -1 ) {
      rtems_interrupt_enable(level);
      printk("IRQ vector %d already connected to an unshared handler\n",irq->name);
	  free(vchain);
      return 0;
    }

    /* save off topmost handler */
    vchain[0]= rtems_hdl_tbl[irq->name];

    /*
     * store the data provided by user
     */
    rtems_hdl_tbl[irq->name] = *irq;

    /* link chain to new topmost handler */
    rtems_hdl_tbl[irq->name].next_handler = (void *)vchain;

	/*
	 * enable_irq_at_pic is supposed to ignore
	 * requests to disable interrupts outside
	 * of the range handled by the PIC
	 */
	BSP_enable_irq_at_pic(irq->name);

    /*
     * Enable interrupt on device
     */
	if (irq->on)
    	irq->on(irq);

    rtems_interrupt_enable(level);

    return 1;
}

static rtems_isr interruptHandler(rtems_vector_number vector) {
  bfin_isr_t *isr = NULL;
  uint32_t sourceMask0 = 0;
  uint32_t sourceMask1 = 0;
  rtems_interrupt_level isrLevel;

  rtems_interrupt_disable(isrLevel);
  vector -= CEC_INTERRUPT_BASE_VECTOR;
  if (vector >= 0 && vector < CEC_INTERRUPT_COUNT) {
    isr = vectors[vector].head;
    sourceMask0 = *(uint32_t volatile *) SIC_ISR &
        *(uint32_t volatile *) SIC_IMASK;
    sourceMask1 = *(uint32_t volatile *) (SIC_ISR + SIC_ISR_PITCH) &
        *(uint32_t volatile *) (SIC_IMASK + SIC_IMASK_PITCH);
    while (isr) {
      if ((sourceMask0 & isr->mask0) || (sourceMask1 & isr->mask1)) {
        isr->isr(isr->_arg);
        sourceMask0 = *(uint32_t volatile *) SIC_ISR &
            *(uint32_t volatile *) SIC_IMASK;
        sourceMask1 = *(uint32_t volatile *) (SIC_ISR + SIC_ISR_PITCH) &
            *(uint32_t volatile *) (SIC_IMASK + SIC_IMASK_PITCH);
      }
      isr = isr->next;
    }
  }
  rtems_interrupt_enable(isrLevel);
}

static BSP_START_TEXT_SECTION __attribute__((flatten)) rtems_status_code
lpc24xx_pin_set_input(
  #ifdef ARM_MULTILIB_ARCH_V4
    volatile uint32_t *pinsel,
    uint32_t pinsel_mask,
    uint32_t pinsel_value,
  #else
    volatile uint32_t *iocon,
    lpc24xx_pin_range pin_range,
  #endif
  volatile uint32_t *fio_dir,
  uint32_t fio_bit
)
{
  rtems_interrupt_level level;

  rtems_interrupt_disable(level);
  *fio_dir &= ~fio_bit;
  #ifdef ARM_MULTILIB_ARCH_V4
    *pinsel &= ~pinsel_mask;
  #else
    *iocon = IOCON_MODE(2) | IOCON_ADMODE | IOCON_FILTER;
  #endif
  rtems_interrupt_enable(level);

  return RTEMS_SUCCESSFUL;
}

/*-------------------------------------------------------------------------+
|         Function:  BSP_irq_disable_at_i8259s
|      Description: Mask IRQ line in appropriate PIC chip.
| Global Variables: i8259s_cache
|        Arguments: vector_offset - number of IRQ line to mask.
|          Returns: Nothing.
+--------------------------------------------------------------------------*/
int BSP_irq_disable_at_i8259s    (const rtems_irq_number irqLine)
{
  unsigned short        mask;
  rtems_interrupt_level level;

  if ( ((int)irqLine < BSP_LOWEST_OFFSET) ||
       ((int)irqLine > BSP_MAX_ON_i8259S )
       )
    return 1;

  rtems_interrupt_disable(level);

  mask = 1 << irqLine;
  i8259s_cache |= mask;
  i8259s_super_imr |= mask;

  if (irqLine < 8)
  {
    outport_byte(PIC_MASTER_IMR_IO_PORT, i8259s_cache & 0xff);
  }
  else
  {
    outport_byte(PIC_SLAVE_IMR_IO_PORT, ((i8259s_cache & 0xff00) >> 8));
  }
  rtems_interrupt_enable(level);

  return 0;
}

/*-------------------------------------------------------------------------+
|         Function:  BSP_irq_disable_at_i8259s
|      Description: Mask IRQ line in appropriate PIC chip.
| Global Variables: i8259s_cache
|        Arguments: vector_offset - number of IRQ line to mask.
|          Returns: original state or -1 on error.
+--------------------------------------------------------------------------*/
int BSP_irq_disable_at_i8259s    (const rtems_irq_number irqLine)
{
  unsigned short        mask;
  rtems_interrupt_level level;
  int                   rval;

  if ( ((int)irqLine < BSP_ISA_IRQ_LOWEST_OFFSET) ||
       ((int)irqLine > BSP_ISA_IRQ_MAX_OFFSET)
       )
    return -1;

  rtems_interrupt_disable(level);

  mask = 1 << irqLine;
  rval = i8259s_cache & mask ? 0 : 1;
  i8259s_cache |= mask;

  if (irqLine < 8)
  {
    outport_byte(PIC_MASTER_IMR_IO_PORT, i8259s_cache & 0xff);
  }
  else
  {
    outport_byte(PIC_SLAVE_IMR_IO_PORT, ((i8259s_cache & 0xff00) >> 8));
  }
  rtems_interrupt_enable(level);

  return rval;
}

/*=========================================================================*\
| Function:                                                                 |
\*-------------------------------------------------------------------------*/
void mcdma_glue_irq_disable
(
/*-------------------------------------------------------------------------*\
| Purpose:                                                                  |
|   disable interrupt for given task number                                 |
+---------------------------------------------------------------------------+
| Input Parameters:                                                         |
\*-------------------------------------------------------------------------*/
 int mcdma_channo                              /* task number to disable   */
)
/*-------------------------------------------------------------------------*\
| Return Value:                                                             |
|    none                                                                   |
\*=========================================================================*/
{
  rtems_interrupt_level level;
  if (0 != ((1UL<<mcdma_channo) & MCDMA_INT_BIT_IMPL)) {
    rtems_interrupt_disable(level);
    /*
     * valid task number
     * disable interrupt in mcdma mask
     */
    MCDMA_INT_DISABLE(MCF548X_DMA_DIMR,mcdma_channo);
    rtems_interrupt_enable(level);
  }
}

/**
 * Configures a PIO or a group of PIO to generate an interrupt on status
 * change. The provided interrupt handler will be called with the triggering
 * pin as its parameter (enabling different pin instances to share the same
 * handler).
 * \param pPin  Pointer to a Pin instance.
 * \param handler  Interrupt handler function pointer.
 * \param arg Pointer to interrupt handler argument
 */
void PIO_ConfigureIt(const Pin *pPin, void (*handler)(const Pin *, void *arg),
    void *arg)
{
	InterruptSource *pSource;
	rtems_interrupt_level level;

	TRACE_DEBUG("PIO_ConfigureIt()\n\r");

	rtems_interrupt_disable(level);

	if (_dwNumSources == MAX_INTERRUPT_SOURCES) {
		bsp_fatal(ATSAM_FATAL_PIO_CONFIGURE_IT);
	}

	pSource = &(_aIntSources[_dwNumSources]);
	pSource->pPin = pPin;
	pSource->handler = handler;
	pSource->arg = arg;

	_dwNumSources++;

	rtems_interrupt_enable(level);

	/* Define new source */
	TRACE_DEBUG("PIO_ConfigureIt: Defining new source #%d.\n\r", _dwNumSources);
}

int mpc5xx_set_exception  (const rtems_raw_except_connect_data* except)
{
    rtems_interrupt_level level;

    if (!mpc5xx_vector_is_valid(except->exceptIndex)) {
        return 0;
    }
    /*
     * Check if default handler is actually connected. If not issue an error.
     * You must first get the current handler via mpc5xx_get_current_exception
     * and then disconnect it using mpc5xx_delete_exception.
     * RATIONALE : to always have the same transition by forcing the user
     * to get the previous handler before accepting to disconnect.
     */
    if (exception_handler_table[except->exceptIndex] !=
            default_raw_except_entry.hdl.raw_hdl) {
        return 0;
    }

    rtems_interrupt_disable(level);

    raw_except_table[except->exceptIndex] = *except;

    exception_handler_table[except->exceptIndex] = except->hdl.raw_hdl;
    if (except->on)
        except->on(except);

    rtems_interrupt_enable(level);
    return 1;
}

/*
 * set management stuff
 */
int BSP_rtems_irq_mngt_set(rtems_irq_global_settings* config)
{
  int                    i;
  rtems_interrupt_level  level;

  rtems_interrupt_disable(level);

  /*
   * store given configuration
   */
  BSP_rtems_irq_config = config;
  BSP_rtems_irq_tbl    = BSP_rtems_irq_config->irqHdlTbl;

  /*
   * store any irq-like processor exceptions
   */
  for (i = BSP_PROCESSOR_IRQ_LOWEST_OFFSET;
       i < BSP_PROCESSOR_IRQ_MAX_OFFSET;
       i++) {
    if (BSP_rtems_irq_tbl[i].hdl != config->defaultEntry.hdl) {
      if (BSP_rtems_irq_tbl[i].on != NULL) {
	BSP_rtems_irq_tbl[i].on
	  (&(BSP_rtems_irq_tbl[i]));
      }
    }
    else {
      if (BSP_rtems_irq_tbl[i].off != NULL) {
	BSP_rtems_irq_tbl[i].off
	  (&(BSP_rtems_irq_tbl[i]));
      }
    }
  }
  rtems_interrupt_enable(level);
  return 1;
}