This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

question about mailbox, how to invoke irq to receiver?

Intellectual 270 points

Replies: 4

Views: 3826

Dear all,

I read omap5 TRM about mailbox.

If maibox1 user0 set interrupt enable as receiver.

How mailbox1 user0 to get the irq?

When does the sender wirte message to mailbox 1 message0 or message 1 or 2 ... 7?

Does any register can set it, if I just want to write message0 or message5 to invoke the interrupt?

Thank you.

4 Replies

  • Hello Descent,

    Which processor you are using, OMAP5 or Keystone ?

    Regards,
    Senthil

    ----------------------------------------------------------------------------------------------------------------

    Please click the "Verify Answer" button on this post if it answers your question.

  • In reply to SenthilKumar Srinivasan:

    Hi SenthilKumar Srinivasan ,

    I use OMAP5.

    Do I miss something?
  • In reply to descent sung:

    Hello Descent,

    Moved this query to OMAP forum.

    Regards,
    Senthil

    ----------------------------------------------------------------------------------------------------------------

    Please click the "Verify Answer" button on this post if it answers your question.

  • The mailbox module includes the following user subsystems:

    • User 0: MPU subsystem (u = 0)

    • User 1: DSP subsystem (u = 1)

    • User 2: IPU subsystem (u = 2)

    • User 3:

    – For the MAILBOX instance - C2C interface

    – For the MAILBOX_IVA instance - IVA subsystem (ICONT1 or ICONT2)

    Each user has a dedicated interrupt signal from the corresponding mailbox module instance and dedicated interrupt enabling and status registers.

    Each MAILBOX_IRQSTATUS_RAW_u/MAILBOX_IRQSTATUS_CLR_u interrupt status register corresponds to a particular user.

    For the MAILBOX instance, a user can query its interrupt status register through the L4_CFG interconnect.

    See the mailbox diagram:

    Mailbox Users:
    
    A device needing to communicate with a target processor device should specify them using the common mailbox binding properties, "mboxes" and the optional
    "mbox-names" (please see Documentation/devicetree/bindings/mailbox/mailbox.txt for details). Each value of the mboxes property should contain a phandle to the mailbox controller device node and an args specifier that will be the phandle to the intended sub-mailbox child node to be used for communication. The equivalent "mbox-names" property value can be used to give a name to the communication channel to be used by the client user.

    Example:
    --------
    
    /* OMAP4 */
    mailbox: mailbox@4a0f4000 {
    	compatible = "ti,omap4-mailbox";
    	reg = <0x4a0f4000 0x200>;
    	interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
    	ti,hwmods = "mailbox";
    	#mbox-cells = <1>;
    	ti,mbox-num-users = <3>;
    	ti,mbox-num-fifos = <8>;
    	mbox_ipu: mbox_ipu {
    		ti,mbox-tx = <0 0 0>;
    		ti,mbox-rx = <1 0 0>;
    	};
    	mbox_dsp: mbox_dsp {
    		ti,mbox-tx = <3 0 0>;
    		ti,mbox-rx = <2 0 0>;
    	};
    };

    Best regards,
    Yanko

      Please click the Verify Answer button on this post if it answers your question.

            Be sure to read the OMAP Application Processors Forum Guidelines and FAQ

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.