dm8168 2G DDR

Hello,

You could check these topics:

http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/t/300680
http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/p/273238/955231
http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/t/290904

Best Regards,
Margarita

Hi Tian,

See the below wiki page:

In the default uboot program ( in file $(EZSDK_ROOT)/board-support/u-boot-<REL-TAG>/board/<ti8168 or ti8148>/ti/evm.c), 2GB physical memory is mapped using register 3 and 4. Register 1 and 2 are unused.

           System Address 0x80000000 is mapped to physical address 0x00000000

           System Address 0xC0000000 is mapped to physical address 0x20000000

   Following code programs the LISA registers for 2GB physical memory (default configuration).

       /* Program the DMM to for 2 GB (interleaved) configuration */

       __raw_writel(0x0, DMM_LISA_MAP__0); /* Register 0 is unused */

       __raw_writel(0x0, DMM_LISA_MAP__1); /* Register 1 is unused */

       __raw_writel(0x80640300, DMM_LISA_MAP__2); /* Register 2 maps 0x80000000 to 0x00000000, length 1GB */

       __raw_writel(0xC0640320, DMM_LISA_MAP__3); /* Register 3 maps 0xC0000000 to 0x20000000, length 1GB */

See also the below u-boot patch:

This patch switch from 2G to 1G. You should revert this patch to switch back to 2G.

Best regards,
Pavel