topic Re: About i.MX6Q interrupt priority in i.MX Processors

About i.MX6Q interrupt priority

ainolike — Wed, 25 Nov 2015 03:24:02 GMT

Dear all,

Hello.

I have a question about interrupt priority in i.MX6Q.

In IMX6DQRM, chapter 2, table2-1 system memory map it gives us the interrupt controller and interrupt distributor registers' address range, but I cannot find the definition about these registers.

Similarly it only gives us the registers’ address about interrupt priority in BSP, besides there is no useful information to this question.

[Q1]

I wonder how to config interrupt priority.

Best regards.

Re: About i.MX6Q interrupt priority

igorpadykov — Thu, 26 Nov 2015 01:49:28 GMT

Hi li

this is described in GIC Architecture Specification from ARM (www.arm.com)

or look at attached document from SDK Chapter 4 Configuring the GIC Driver

Best regards

igor

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

Note: If this post answers your question, please click the Correct Answer button. Thank you!

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

Re: About i.MX6Q interrupt priority

ainolike — Fri, 27 Nov 2015 09:20:51 GMT

Thanks for your help. I have looked at the document, but I still cannot deal with it.

In the file vxbArmGenIntCtrl.c, it gives some information as follows,

Optinally, the interrupt priority and sensitivity can be set as below in hwconf:

\cs

LOCAL const struct intrCtlrPriority armGICPriority[] = {

{ INT_PIN_TIMER, INT_PRI_TIMER_0},

{ INT_PIN_UART, INT_PRI_UART_1 },

{ INT_PIN_DMA, INT_PRI_SDMA },

{ INT_PIN_END, INT_PRI_FEC },

};

\ce

Also in BSP of imx31,imx35,imx51,imx53, ect, this method has been used. I try to add my own code in hwconf.c like this.

struct intrCtlrPriority imx6Priority[] =

{

/* pin, priority */

{IMX_INT_GPIO1, 15},

{IMX_INT_GPIO2, 1},

};

const struct hcfResource imx6IntCtlrResources[] =

{

{ "regBase", HCF_RES_INT, {(void *)ARM_GIC_BASE}},

{ "intMode", HCF_RES_INT, {(void *)INT_MODE}},

{ "input", HCF_RES_ADDR, {(void *)&armGicInputs[0]}},

{ "inputTableSize", HCF_RES_INT, {(void *)NELEMENTS(armGicInputs)}},

{ "priority", HCF_RES_ADDR, {(void *)&imx6Priority[0]}},

{ "priorityTableSize", HCF_RES_INT, {(void *)NELEMENTS(imx6Priority)}},

};

#define imx6IntCtlrNum NELEMENTS(imx6IntCtlrResources)

const struct hcfDevice hcfDeviceList[] = {

{"vxbImx6IntCtrl", 0, VXB_BUSID_PLB, 0, imx6IntCtlrNum, imx6IntCtlrResources},

...

But it I could get what i want. Could I do like this? And where is my problem?