Public Version
IVA2.2 Subsystem Integration
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Table 5-2. IVA2.2 Subsystem EDMA Request Mappings (continued)
DMA
Source
Description
D_DMA_7
MCBSP4_DMA_RX
MCBSP module 4 - receive request
D_DMA_8
MCBSP5_DMA_TX
MCBSP module 5 - transmit request
D_DMA_9
MCBSP5_DMA_RX
MCBSP module 5 - receive request
D_DMA_10
UART3_DMA_TX
UART module 3 - transmit request
D_DMA_11
UART3_DMA_RX
UART module 3 - receive request
D_DMA_12
Reserved
D_DMA_13
Reserved
D_DMA_14
Reserved
D_DMA_15
Reserved
D_DMA_16
Reserved
D_DMA_17
Reserved
D_DMA_18
Reserved
D_DMA_19
Reserved
NOTE:
All EDMA requests are shared DMA requests; they are also mapped on the system DMA
(sDMA). For more information, see
, DMA.
For more information about EDMA request management, see
, Programming an EDMA
Transfer.
5.2.2.2
Interrupt Requests
The IVA2.2 subsystem manages three types of interrupts (see
•
Internal interrupts: Requests generated by modules in the IVA2.2 subsystem or in the DSP
megamodule included in the IVA2.2 subsystem
•
External interrupts: Requests generated by peripherals external to the IVA2.2 subsystem, like SPI,
display subsystem, or camera subsystem. Peripherals that generate interrupts at the IVA2.2 level use
the IVA2_IRQ[47:0] input lines of the IVA2.2 subsystem.
•
MMU interrupt: The IVA2.2 MMU can generate an interrupt to an external host outside the IVA2.2
subsystem. As shown in
, the interrupt line of the MMU, IVA2_MMU_IRQ, is connected to
M_IRQ_28 of the MPU subsystem interrupt controller.
For more information about the functionality of the IVA2.2 MMU, see
, IVA2.2 Subsystem
Functional Description.
To manage and expand the interrupt capabilities of the DSP megamodule (internal and external interrupt
requests), the IVA2.2 subsystem includes two levels of interrupt control (see
•
One interrupt controller (INTC), integrated in the DSP megamodule. This module controls all interrupt
requests (internal and external) except the MMU interrupt.
For more information about the INTC, see
•
One WUGEN: Responsible at the IVA2.2 subsystem level for detecting wake-up events (interrupts,
DMA requests, and slave port access) when the IVA2.2 is powered down. The WUGEN also handles
formatting interrupts from device peripherals to the DSP megamodule INTC.
702
IVA2.2 Subsystem
SWPU177N – December 2009 – Revised November 2010
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