xipif_v1_23_b.h

Uboot源码,非常通用的bootloader.适用于各种平台的Linux系统引导.

*
* This function gets the device interrupt pending register contents.
* This register indicates the pending interrupt sources, those that are waiting
* to be serviced by the software, for a device which contains the IPIF.
* An interrupt must be enabled in the interrupt enable register of the IPIF to
* be pending.
*
* Each bit of the register correlates to a specific interrupt source within the
* the device which contains the IPIF.  With the exception of some internal IPIF
* conditions, the contents of this register are not latched since the condition
* is latched in the IP interrupt status register, by an internal block of the
* IPIF such as a FIFO or DMA channel, or by the IP of the device.  This register
* is read only and is not latched, but it is necessary to acknowledge (clear)
* the interrupt condition by performing the appropriate processing for the IP
* or block within the IPIF.
*
* This register can be thought of as the contents of the interrupt status
* register ANDed with the contents of the interrupt enable register.
*
* ARGUMENTS:
*
* RegBaseAddress contains the base address of the IPIF registers.
*
* RETURN VALUE:
*
* The value read from the interrupt pending register of the device.  The bit
* definitions are specific to the device with the exception of the latched
* internal IPIF condition bits. The following values may be used to detect
* internal IPIF conditions in the value.
*
*   XIIF_V123B_ERROR_MASK     Indicates a device error in the IPIF
*
* NOTES:
*
* None.
*
******************************************************************************/
#define XIIF_V123B_READ_DIPR(RegBaseAddress) \
    XIo_In32((RegBaseAddress) + XIIF_V123B_DIPR_OFFSET)

/******************************************************************************
*
* MACRO:
*
* XIIF_V123B_READ_DIIR
*
* DESCRIPTION:
*
* This function gets the device interrupt ID for the highest priority interrupt
* which is pending from the interrupt ID register. This function provides
* priority resolution such that faster interrupt processing is possible.
* Without priority resolution, it is necessary for the software to read the
* interrupt pending register and then check each interrupt source to determine
* if an interrupt is pending.  Priority resolution becomes more important as the
* number of interrupt sources becomes larger.
*
* Interrupt priorities are based upon the bit position of the interrupt in the
* interrupt pending register with bit 0 being the highest priority. The
* interrupt ID is the priority of the interrupt, 0 - 31, with 0 being the
* highest priority. The interrupt ID register is live rather than latched such
* that multiple calls to this function may not yield the same results.	A
* special value, outside of the interrupt priority range of 0 - 31, is
* contained in the register which indicates that no interrupt is pending.  This
* may be useful for allowing software to continue processing interrupts in a
* loop until there are no longer any interrupts pending.
*
* The interrupt ID is designed to allow a function pointer table to be used
* in the software such that the interrupt ID is used as an index into that
* table.  The function pointer table could contain an instance pointer, such
* as to DMA channel, and a function pointer to the function which handles
* that interrupt.  This design requires the interrupt processing of the device
* driver to be partitioned into smaller more granular pieces based upon
* hardware used by the device, such as DMA channels and FIFOs.
*
* It is not mandatory that this function be used by the device driver software.
* It may choose to read the pending register and resolve the pending interrupt
* priorities on it's own.
*
* ARGUMENTS:
*
* RegBaseAddress contains the base address of the IPIF registers.
*
* RETURN VALUE:
*
* An interrupt ID, 0 - 31, which identifies the highest priority interrupt
* which is pending.  A value of XIIF_NO_INTERRUPT_ID indicates that there is
* no interrupt pending. The following values may be used to identify the
* interrupt ID for the internal IPIF interrupts.
*
*   XIIF_V123B_ERROR_INTERRUPT_ID     Indicates a device error in the IPIF
*
* NOTES:
*
* None.
*
******************************************************************************/
#define XIIF_V123B_READ_DIIR(RegBaseAddress) \
    XIo_In32((RegBaseAddress) + XIIF_V123B_DIIR_OFFSET)

/******************************************************************************
*
* MACRO:
*
* XIIF_V123B_GLOBAL_INTR_DISABLE
*
* DESCRIPTION:
*
* This function disables all interrupts for the device by writing to the global
* interrupt enable register.  This register provides the ability to disable
* interrupts without any modifications to the interrupt enable register such
* that it is minimal effort to restore the interrupts to the previous enabled
* state.  The corresponding function, XIpIf_GlobalIntrEnable, is provided to
* restore the interrupts to the previous enabled state.	 This function is
* designed to be used in critical sections of device drivers such that it is
* not necessary to disable other device interrupts.
*
* ARGUMENTS:
*
* RegBaseAddress contains the base address of the IPIF registers.
*
* RETURN VALUE:
*
* None.
*
* NOTES:
*
* None.
*
******************************************************************************/
#define XIIF_V123B_GINTR_DISABLE(RegBaseAddress) \
    XIo_Out32((RegBaseAddress) + XIIF_V123B_DGIER_OFFSET, 0)

/******************************************************************************
*
* MACRO:
*
* XIIF_V123B_GINTR_ENABLE
*
* DESCRIPTION:
*
* This function writes to the global interrupt enable register to enable
* interrupts from the device.  This register provides the ability to enable
* interrupts without any modifications to the interrupt enable register such
* that it is minimal effort to restore the interrupts to the previous enabled
* state.  This function does not enable individual interrupts as the interrupt
* enable register must be set appropriately.  This function is designed to be
* used in critical sections of device drivers such that it is not necessary to
* disable other device interrupts.
*
* ARGUMENTS:
*
* RegBaseAddress contains the base address of the IPIF registers.
*
* RETURN VALUE:
*
* None.
*
* NOTES:
*
* None.
*
******************************************************************************/
#define XIIF_V123B_GINTR_ENABLE(RegBaseAddress)		  \
    XIo_Out32((RegBaseAddress) + XIIF_V123B_DGIER_OFFSET, \
	       XIIF_V123B_GINTR_ENABLE_MASK)

/******************************************************************************
*
* MACRO:
*
* XIIF_V123B_IS_GINTR_ENABLED
*
* DESCRIPTION:
*
* This function determines if interrupts are enabled at the global level by
* reading the gloabl interrupt register. This register provides the ability to
* disable interrupts without any modifications to the interrupt enable register
* such that it is minimal effort to restore the interrupts to the previous
* enabled state.
*
* ARGUMENTS:
*
* RegBaseAddress contains the base address of the IPIF registers.
*
* RETURN VALUE:
*
* XTRUE if interrupts are enabled for the IPIF, XFALSE otherwise.
*
* NOTES:
*
* None.
*
******************************************************************************/
#define XIIF_V123B_IS_GINTR_ENABLED(RegBaseAddress)		\
    (XIo_In32((RegBaseAddress) + XIIF_V123B_DGIER_OFFSET) ==	\
	      XIIF_V123B_GINTR_ENABLE_MASK)

/******************************************************************************
*
* MACRO:
*
* XIIF_V123B_WRITE_IISR
*
* DESCRIPTION:
*
* This function sets the IP interrupt status register to the specified value.
* This register indicates the status of interrupt sources for the IP of the
* device.  The IP is defined as the part of the device that connects to the
* IPIF.	 The status is independent of whether interrupts are enabled such that
* the status register may also be polled when interrupts are not enabled.
*
* Each bit of the register correlates to a specific interrupt source within the
* IP.  All bits of this register are latched. Setting a bit which is zero
* within this register causes an interrupt to be generated.  The device global
* interrupt enable register and the device interrupt enable register must be set
* appropriately to allow an interrupt to be passed out of the device. The
* interrupt is cleared by writing to this register with the bits to be
* cleared set to a one and all others to zero.	This register implements a
* toggle on write functionality meaning any bits which are set in the value
* written cause the bits in the register to change to the opposite state.
*
* This function writes only the specified value to the register such that
* some status bits may be set and others cleared.  It is the caller's
* responsibility to get the value of the register prior to setting the value
* to prevent an destructive behavior.
*
* ARGUMENTS:
*
* RegBaseAddress contains the base address of the IPIF registers.
*
* Status contains the value to be written to the IP interrupt status
* register.  The bit definitions are specific to the device IP.
*
* RETURN VALUE:
*
* None.
*
* NOTES:
*
* None.
*
******************************************************************************/
#define XIIF_V123B_WRITE_IISR(RegBaseAddress, Status) \
    XIo_Out32((RegBaseAddress) + XIIF_V123B_IISR_OFFSET, (Status))

/******************************************************************************
*
* MACRO:
*
* XIIF_V123B_READ_IISR
*
* DESCRIPTION:
*
* This function gets the contents of the IP interrupt status register.
* This register indicates the status of interrupt sources for the IP of the
* device.  The IP is defined as the part of the device that connects to the
* IPIF. The status is independent of whether interrupts are enabled such
* that the status register may also be polled when interrupts are not enabled.
*
* Each bit of the register correlates to a specific interrupt source within the
* device.  All bits of this register are latched.  Writing a 1 to a bit within
* this register causes an interrupt to be generated if enabled in the interrupt
* enable register and the global interrupt enable is set.  Since the status is
* latched, each status bit must be acknowledged in order for the bit in the
* status register to be updated.  Each bit can be acknowledged by writing a
* 0 to the bit in the status register.

* ARGUMENTS:
*
* RegBaseAddress contains the base address of the IPIF registers.
*
* RETURN VALUE:
*
* A status which contains the value read from the IP interrupt status register.
* The bit definitions are specific to the device IP.
*
* NOTES:
*
* None.
*
******************************************************************************/
#define XIIF_V123B_READ_IISR(RegBaseAddress) \
    XIo_In32((RegBaseAddress) + XIIF_V123B_IISR_OFFSET)

/******************************************************************************
*
* MACRO:
*
* XIIF_V123B_WRITE_IIER
*
* DESCRIPTION:
*
* This function sets the IP interrupt enable register contents.	 This register
* controls which interrupt sources of the IP are allowed to generate an
* interrupt.  The global interrupt enable register and the device interrupt
* enable register must also be set appropriately for an interrupt to be
* passed out of the device containing the IPIF and the IP.
*
* Each bit of the register correlates to a specific interrupt source within the
* IP.  Setting a bit in this register enables the interrupt source to generate
* an interrupt.	 Clearing a bit in this register disables interrupt generation
* for that interrupt source.
*
* This function writes only the specified value to the register such that
* some interrupt sources may be enabled and others disabled.  It is the
* caller's responsibility to get the value of the interrupt enable register
* prior to setting the value to prevent an destructive behavior.
*
* ARGUMENTS:
*
* RegBaseAddress contains the base address of the IPIF registers.
*
* Enable contains the value to be written to the IP interrupt enable register.
* The bit definitions are specific to the device IP.
*
* RETURN VALUE:
*
* None.
*
* NOTES:
*
* None.
*
******************************************************************************/
#define XIIF_V123B_WRITE_IIER(RegBaseAddress, Enable) \
    XIo_Out32((RegBaseAddress) + XIIF_V123B_IIER_OFFSET, (Enable))

/******************************************************************************
*
* MACRO:
*
* XIIF_V123B_READ_IIER
*
* DESCRIPTION:
*
*
* This function gets the IP interrupt enable register contents.	 This register
* controls which interrupt sources of the IP are allowed to generate an
* interrupt.  The global interrupt enable register and the device interrupt
* enable register must also be set appropriately for an interrupt to be
* passed out of the device containing the IPIF and the IP.
*
* Each bit of the register correlates to a specific interrupt source within the
* IP.  Setting a bit in this register enables the interrupt source to generate
* an interrupt.	 Clearing a bit in this register disables interrupt generation
* for that interrupt source.
*
* ARGUMENTS:
*
* RegBaseAddress contains the base address of the IPIF registers.
*
* RETURN VALUE:
*
* The contents read from the IP interrupt enable register.  The bit definitions
* are specific to the device IP.
*
* NOTES:
*
* Signature: u32 XIIF_V123B_READ_IIER(u32 RegBaseAddress)
*
******************************************************************************/
#define XIIF_V123B_READ_IIER(RegBaseAddress) \
    XIo_In32((RegBaseAddress) + XIIF_V123B_IIER_OFFSET)

/************************** Function Prototypes ******************************/

/*
 * Initialization Functions
 */
XStatus XIpIfV123b_SelfTest(u32 RegBaseAddress, u8 IpRegistersWidth);

#endif				/* end of protection macro */