Setting up for HPI on OMAP-L138

All:

Here is what I have so far. It was a lot easier to initially use some "magic numbers" for initializing.

It looks like all of pinmux13, pinmux14, and pinmux15 needs to be set up for HPI.

Only 2 nibbles of pinmux16 are involved with HPI.

/*****************************************************************************
* FUNCTION: cnfg_hpi
*
* PURPOSE : Configures OMAP registers for the HPI controller and pinmuxing
* for FPGA communication.
*
*****************************************************************************/
static void cnfg_hpi(void)
{
//pinmux register 13 - HPI bits
unsigned int* PINMUX13 = (unsigned int*)(MEM_SYS_BASE + 0x154);
*PINMUX13 = 0x22222222;

//pinmux register 14 - HPI bits
unsigned int* PINMUX14 = (unsigned int*)(MEM_SYS_BASE + 0x158);
*PINMUX14 = 0x22222222;

//pinmux register 15 - HPI bits
unsigned int* PINMUX15 = (unsigned int*)(MEM_SYS_BASE + 0x15C);
*PINMUX15 = 0x22222222;

//pinmux register 16 - HPI bits
unsigned int* PINMUX16 = (unsigned int*)(MEM_SYS_BASE + 0x160);
*PINMUX16 |= 0x00000022;

HWREG(SOC_SYSCFG_0_REGS + SYSCFG0_CFGCHIP1) |= SYSCFG_CFGCHIP1_HPIENA;

}

just added power control - hopefully this is correct.

   PSCModuleControl(SOC_PSC_1_REGS, HW_PSC_UHPI, PSC_POWERDOMAIN_ALWAYS_ON,

    PSC_MDCTL_NEXT_ENABLE);

I am still not able to change bits in HPIC, even though information now shows up in the registers under HPI0DSP.

I also take HPI out of reset... here is my latest configuration code:

With the above settings, we are able to set up the HPiC and HPIA registers and view them from Code Composer Studio.

However, the HPID register is not viewable. When we try to update location 0x8000 0000 we are able to see the Address in the HPIA register, but the RAM at that location does not get updated. Unfortunately, the lines between the FPGA and the OMAP cannot be reached with a probe, so a logic analyzer cannot be set up to view the activity of a BGA - to - BGA set of signals.

Am I missing something - is there some additional permission needed on the OMAP side to allow the "value"  in the HPID to be placed into memory?

The location was being used by the ARM processor on bring-up, and when the C6000 code was loaded, it was placed into external DDR memory, so writing and reading from 0x8000 0000 seemed ideal from an HPI testing viewpoint.

Again, am I missing some permission to write to 0x8000 0000?

Thanks - 

I have two different platforms where I can read and write HPIC, and view HPIA, but I cannot update the code at shared memory location 0x80000000 (or 0x80008000 for that matter). Again, is there a setting that I am missing regarding tranfer of contents to and from the HPID register. Unfortunately, the external lines are hidden from view (OMAP BGA package to FPGA BGA package), so I cannot connect these lines to a logic analyzer. I have posted my initialization routine earlier. 

I was told this morning that the waveforms for updating the HPIC and HPIA registers were followed, and the result is confirmed data in both of those registers as viewed by Code Composer Studio (v.6.1.1). However, the HPID register cannot be viewed via CCS (I have no idea why!), and the waveforms generated by the FPGA match the "prescribed waveforms" in the HPI section of the technical reference manual.

Any idea why we are not seeing RAM being updated?

Has anyone used the HPI on the OMAP-L138 and can give some guidance?

Thanks.

"Sorry for the delayed responses on this.
Actually I don't have hands on experience with this peripheral so, I seek some support from internal team."

All:

Again, here is my configuration function for HPI. However, we are unable to read or write the contents of 0x8000 0000, which should be available when running from DDR memory on the DSP side. Is there  a setting that I am missing to allow access to the 0x8000 0000 area of RAM?