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AM3892BCYG150 Folha de dados(PDF) 11 Page - Texas Instruments |
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AM3892BCYG150 Folha de dados(HTML) 11 Page - Texas Instruments |
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11 / 308 page  Mailbox Mailbox Mailbox Mailbox Mailbox Mailbox Mailbox Mailbox Mailbox Mailbox Mailbox Mailbox L4 Interconnect Interrupt Interrupt Interrupt Mailbox Module ARM Cortex-A8 Media Controller AM3894 AM3892 www.ti.com SPRS681E – OCTOBER 2010 – REVISED JULY 2012 2.4 Media Controller The Media Controller has the responsibility of managing the HDVPSS module. 2.5 Inter-Processor Communication This device is a multi-core device that requires software to efficiently manage and communicate between the cores. The following are the main features that need to be implemented by such software: 1. Device management of the slave processors from the host processor. 2. Inter-processor communication between the cores for transfer and exchange of information between them. For implementing efficient inter-processor communication between the multiple cores on the device, the following hardware features are provided: • Mailbox interrupts • Hardware spinlocks Mailboxes provide a mechanism for one processor to write a value to a register and send an interrupt to another processor. Spinlocks facilitate access to shared resources in the system. 2.5.1 Mailbox Module The device Mailbox module facilitates communication between the ARM Cortex-A8 and the Media Controller. It consists of twelve mailboxes, each supporting communication between two of the above processors. The sender sends information to the receiver by writing a message to the mailbox registers. Interrupt signaling is used to notify the receiver that a message has been queued or to notify the sender about an overflow situation. The Mailbox module supports the following features (see Figure 2-2): • 12 mailboxes • Four-message FIFO depth for each message queue • 32-bit message width • Message reception and queue-not-full notification using interrupts • Three interrupts (one to ARM Cortex-A8, two to Media Controller). Figure 2-2. Mailbox Module Block Diagram Copyright © 2010–2012, Texas Instruments Incorporated Device Overview 11 Submit Documentation Feedback Product Folder Link(s): AM3894 AM3892 |
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