on-chip ROM question

Hi Jack,

What type of DM816x device do you have, GP or HS? If GP device, the secure ROM memory is not accessible/used. For more information regarding the secure ROM and any other security related questions, refer to your local TI representative/FAE. We cannot discuss this in public.

BR,

Pavel

hi Pavel,

What type of DM816x device do you have, GP or HS?

- how did I distinguish this?

Hi Jack,

You can check the device type from the u-boot log. When I boot up, my u-boot is reporting:

U-Boot 2010.06-dirty (Jul 23 2012 - 15:29:19)

TI8168-GP rev 1.1

Which means I have DM8168 GP silicon revision 1.1 device.

Does your u-boot report something like the above?

Regards,

Pavel

Does your u-boot report something like the above?

- yes, mine is as below

204536 bytes read
## Starting application at 0x80800000 ...

U-Boot 2010.06 (Sep 13 2012 - 15:02:32)

TI8168-GP rev 1.1

so did you mean if it's HS version, then it will show  "TI8168-HS". Right?

Yes, this is right.

This is the u-boot source code in EZSDK:

{EZSDK}/board-support/u-boot-2010.06-psp04.04.00.01/arch/arm/arm_cortexa8/ti81xx/sys_info.c

/*************************************************************
 *  get_device_type(): tell if GP/HS/EMU/TST
 *************************************************************/
u32 get_device_type(void)
{
    int mode;
    mode = __raw_readl(CONTROL_STATUS) & (DEVICE_MASK);
    return(mode >>= 8);
}

/**
 * Print CPU information
 */
int print_cpuinfo (void)
{
    char *cpu_s, *sec_s;
    int arm_freq, ddr_freq , rev;
#ifdef CONFIG_DM385
    int l3_freq, dss_freq, iva_freq, iss_freq;
#endif

    rev = get_cpu_rev();
    switch (get_cpu_type()) {
    case TI8168:
        cpu_s = "TI8168";
        break;
    case TI8148:
        cpu_s = "TI8148";
        break;
    case DM385:
        cpu_s = "DM385";
        break;
    default:
        cpu_s = "Unknown cpu type";
        break;
    }

    switch (get_device_type()) {
    case TST_DEVICE:
        sec_s = "TST";
        break;
    case EMU_DEVICE:
        sec_s = "EMU";
        break;
    case HS_DEVICE:
        sec_s = "HS";
        break;
    case GP_DEVICE:
        sec_s = "GP";
        break;
    default:
        sec_s = "?";
    }

For RDK, should be similar.

Regards,

Pavel