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DM816x EZSDK 2GB memory map

msa01
Prodigy 60 points

Hi,

My  DM816x system has 1GB memory map configuration now. I need to make configuration changes to use 2GB memory map to use memory available on the custom board. Any help/advise appreciated?

  • 0
    TI__Guru* 80190 points
    Hello,

    Please refer this wiki page.
    processors.wiki.ti.com/.../EZSDK_Memory_Map
    It will help to understand the memory map in EZSDK.
    You could check the TRM memory map chapter also.
    Here is some useful e2e treads:
    e2e.ti.com/.../1090591
    e2e.ti.com/.../1675468
    e2e.ti.com/.../206884
    You could search in the e2e for more.

    Hope this helps.

    BR
    Margarita
  • 0 in reply to Margarita Gashova
    Prodigy 60 points
    I made changes to u-boot to enable 2GB memory. Now, I see the 0x80000000 and 0xc0000000 adress point to same address. Please find the md output

    NETRA#md 0x80000000
    80000000: 21591247 c6fabcc2 f2babfef c67aacf7 G.Y!..........z.
    80000010: ecf9fe33 fffefbfb efb97bae bddbfb7b 3........{..{...
    80000020: f8fb4afe bc7be37d c7ffaf1d d39eeefe .J..}.{.........
    80000030: cc37eff2 9fddee23 be57dee5 be8fdbed ..7.#.....W.....
    80000040: 364e9e2e f3bbd9bf 2bbe3aee f91fd9fb ..N6.....:.+....
    80000050: 97dfafdf 6fbfbffb f68cf5b7 cbff7b7c .......o....|{..
    80000060: 9798ff7f 7baef8cb f2cf3acf 77ddfe6f .......{.:..o..w
    80000070: 6df9efbe feae0ba9 4ab66969 977ffbad ...m....ii.J....
    80000080: 5fbe7fae e9fcab5f 7d9a5bf7 71d5da3d ...__....[.}=..q
    80000090: 8d59c331 78b1ebda bdecefeb 58f6b3db 1.Y....x.......X
    800000a0: 9bcebb36 b4efbae8 8f67bb94 d17baaee 6.........g...{.
    800000b0: b6efbb7a eedbd5fe 37bb951e afe898f7 z..........7....
    800000c0: bfd9fedf 67fbba72 eedba75a 2f7ae7bb ....r..gZ.....z/
    800000d0: 9726fed2 c6f96ef3 b653e6fe e765adc7 ..&..n....S...e.
    800000e0: 25c9fbb9 3cbbfbeb 68dbeee7 bf8afff6 ...%...<...h....
    800000f0: 73eff6ca 4fd9f6ee 77fbffbb dbfff81b ...s...O...w....
    NETRA#md 0xc0000000
    c0000000: 21591247 c6fabcc2 f2babfef c67aacf7 G.Y!..........z.
    c0000010: ecf9fe33 fffefbfb efb97bae bddbfb7b 3........{..{...
    c0000020: f8fb4afe bc7be37d c7ffaf1d d39eeefe .J..}.{.........
    c0000030: cc37eff2 9fddee23 be57dee5 be8fdbed ..7.#.....W.....
    c0000040: 364e9e2e f3bbd9bf 2bbe3aee f91fd9fb ..N6.....:.+....
    c0000050: 97dfafdf 6fbfbffb f68cf5b7 cbff7b7c .......o....|{..
    c0000060: 9798ff7f 7baef8cb f2cf3acf 77ddfe6f .......{.:..o..w
    c0000070: 6df9efbe feae0ba9 4ab66969 977ffbad ...m....ii.J....
    c0000080: 5fbe7fae e9fcab5f 7d9a5bf7 71d5da3d ...__....[.}=..q
    c0000090: 8d59c331 78b1ebda bdecefeb 58f6b3db 1.Y....x.......X
    c00000a0: 9bcebb36 b4efbae8 8f67bb94 d17baaee 6.........g...{.
    c00000b0: b6efbb7a eedbd5fe 37bb951e afe898f7 z..........7....
    c00000c0: bfd9fedf 67fbba72 eedba75a 2f7ae7bb ....r..gZ.....z/
    c00000d0: 9726fed2 c6f96ef3 b653e6fe e765adc7 ..&..n....S...e.
    c00000e0: 25c9fbb9 3cbbfbeb 68dbeee7 bf8afff6 ...%...<...h....
    c00000f0: 73eff6ca 4fd9f6ee 77fbffbb dbfff81b ...s...O...w....

    Changed 0x80000000 to 0x00000000 using mw and get the below result.
    NETRA#mw 0x80000000 0x00000000 0x100
    NETRA#md 0x80000000
    80000000: 00000000 00000000 00000000 00000000 ................
    80000010: 00000000 00000000 00000000 00000000 ................
    80000020: 00000000 00000000 00000000 00000000 ................
    80000030: 00000000 00000000 00000000 00000000 ................
    80000040: 00000000 00000000 00000000 00000000 ................
    80000050: 00000000 00000000 00000000 00000000 ................
    80000060: 00000000 00000000 00000000 00000000 ................
    80000070: 00000000 00000000 00000000 00000000 ................
    80000080: 00000000 00000000 00000000 00000000 ................
    80000090: 00000000 00000000 00000000 00000000 ................
    800000a0: 00000000 00000000 00000000 00000000 ................
    800000b0: 00000000 00000000 00000000 00000000 ................
    800000c0: 00000000 00000000 00000000 00000000 ................
    800000d0: 00000000 00000000 00000000 00000000 ................
    800000e0: 00000000 00000000 00000000 00000000 ................
    800000f0: 00000000 00000000 00000000 00000000 ................
    NETRA#md 0xc0000000
    c0000000: 00000000 00000000 00000000 00000000 ................
    c0000010: 00000000 00000000 00000000 00000000 ................
    c0000020: 00000000 00000000 00000000 00000000 ................
    c0000030: 00000000 00000000 00000000 00000000 ................
    c0000040: 00000000 00000000 00000000 00000000 ................
    c0000050: 00000000 00000000 00000000 00000000 ................
    c0000060: 00000000 00000000 00000000 00000000 ................
    c0000070: 00000000 00000000 00000000 00000000 ................
    c0000080: 00000000 00000000 00000000 00000000 ................
    c0000090: 00000000 00000000 00000000 00000000 ................
    c00000a0: 00000000 00000000 00000000 00000000 ................
    c00000b0: 00000000 00000000 00000000 00000000 ................
    c00000c0: 00000000 00000000 00000000 00000000 ................
    c00000d0: 00000000 00000000 00000000 00000000 ................
    c00000e0: 00000000 00000000 00000000 00000000 ................
    c00000f0: 00000000 00000000 00000000 00000000 ................

    I made the following changes in u-boot for 2GB memory use.

    __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 */

    /**
    * Physical Memory Map
    */
    #define CONFIG_NR_DRAM_BANKS 2 /* we have 2 banks of DRAM */
    #define PHYS_DRAM_1 0x80000000 /* DRAM Bank #1 */
    #define PHYS_DRAM_1_SIZE 0x40000000 /* 1 GB */
    #define PHYS_DRAM_2 0xC0000000 /* DRAM Bank #2 */
    #define PHYS_DRAM_2_SIZE 0x40000000 /* 1 GB */

    What is the possible reason for both 0x80000000 and 0xc0000000 pointing to same address location?