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DRA787: How to config non-cache share memory

Intellectual 420 points

Replies: 7

Views: 172

Part Number: DRA787

We are develop the log system link vision sdk log system, 

We config a share memory use keyword CachePolicy_NON_CACHEABLE.

When we save log and log length to share memory in DSP1, the IPU1_0 get the log length , but the length is 0.

If save log length to share memory, then call CacheP_wbInv(), then IPU1_0 get the log length is correct.

It seems the share memory is cacheable,.

How to config non-cache share memory?

  • Hi,

    Are you taking care of this in MMU configuration for IPU.

    Make sure your share memory falls under non- cacheable page.

    Regards,

    Anuj

  • In reply to Anuj Gupta:

    Hi Anuj

    How to check whether share memory falls under non- cacheable page?

    Thanks!

  • In reply to user5892527:

    Hi,

    Please check the MMU configuration

    Check below file for all page allocation

    \vision_sdk\links_fw\src\rtos\bios_app_common\tda2ex\ipu1_0\Ammu1_bios.cfg

    Regards,

    Anuj

  • In reply to Anuj Gupta:

    Hi

    We not use vision SDK, we create a CCS project.

    Memory map config as following

  • In reply to user5892527:

    var SR_0 = {
    name: "SR_0", space: "data", access: "RWX",
    base: 0x8E000000, len: 0x1000000,
    comment: "SR#0 Memory (16 MB)"
    };

    var Ecarx_log= {
    name: "Ecarx_log", space: "data", access: "RWX",
    base: 0x87000000, len: 0x200000,
    comment: "Ecarx_log Memory (2 MB)"
    };
    memcount=0;
    var memory = []

    memory[memcount++]=["L2_RAM",
    {
    base: 0x20000000,
    space: "code/data",
    name: "L2_RAM",
    len: 0x00010000,
    access: "RWX",
    }
    ];
    memcount++;

    memory[memcount++]=["OCMC_RAM",
    {
    base: 0x40300000,
    space: "code/data",
    name: "OCMC_RAM",
    len: 0x00080000,
    access: "RWX",
    }
    ];
    memcount++;

    memory[memcount++]=["EXT_RAM",
    {
    base: 0x80000000,
    space: "code/data",
    name: "EXT_RAM",
    len: 0x06000000,
    access: "RWX",
    }
    ];
    memcount++;

    memory[memcount++]=["IPU1_0_PROG",
    {
    base: 0x86000000,
    space: "code/data",
    name: "IPU1_0_PROG",
    len: 0x1000000,
    access: "RWX",
    }
    ];
    memcount++;

    memory[memcount++]=["SR_0", SR_0 ];
    memcount++;

    memory[memcount++]=["Ecarx_log", Ecarx_log ];
    memcount++;

    Build.platformTable["ti.platforms.evmTDA3XX:dsp1"] = {
    externalMemoryMap: [
    [ "DSP1_PROG", {
    name: "DSP1_PROG", space: "code/data", access: "RWX",
    base: 0x8C000000, len: 0x1000000,
    comment: "DSP1 Program Memory (16 MB)"
    }],
    /* [ "DSP1_PROG", {
    name: "DSP1_PROG", space: "code/data", access: "RWX",
    base: 0x83200000, len: 0x1000000,
    comment: "DSP1 Program Memory (16 MB)"
    }],*/
    [ "SR_0", SR_0 ],
    [ "Ecarx_log", Ecarx_log ]
    ],
    codeMemory: "DSP1_PROG",
    dataMemory: "DSP1_PROG",
    stackMemory: "DSP1_PROG",
    l1DMode: "32k",
    l1PMode: "32k",
    l2Mode: "128k"
    };

    Build.platformTable["ti.platforms.evmTDA3XX:dsp2"] = {
    externalMemoryMap: [
    [ "DSP2_PROG", {
    name: "DSP2_PROG", space: "code/data", access: "RWX",
    base: 0x8D000000, len: 0x1000000,
    comment: "DSP2 Program Memory (16 MB)"
    }],
    /* [ "DSP2_PROG", {
    name: "DSP2_PROG", space: "code/data", access: "RWX",
    base: 0x86400000, len: 0x1000000,
    comment: "DSP2 Program Memory (16 MB)"
    }],*/
    [ "SR_0", SR_0 ],
    [ "Ecarx_log", Ecarx_log ]
    ],
    codeMemory: "DSP2_PROG",
    dataMemory: "DSP2_PROG",
    stackMemory: "DSP2_PROG",
    l1DMode: "32k",
    l1PMode: "32k",
    l2Mode: "128k"
    };

    Build.platformTable["ti.platforms.evmTDA3XX:eve1"] = {
    customMemoryMap: memory,
    externalMemoryMap: [
    [ "EVEVECS", { /* name used by SYS/BIOS */
    name: "EVEVECS", space: "code/data", access: "RWX",
    base: 0x80000000, len: 0x1000, page: 0,
    comment: "EVE1 Vector Table (4 KB)"
    }],
    [ "EVE1_PROG", {
    name: "EVE1_PROG", space: "code/data", access: "RWX",
    base: 0x80001000, len: 0x3FF000, page: 1,
    comment: "EVE1 Program Memory (~4 MB)"
    }],
    [ "SR_0", SR_0 ],
    [ "Ecarx_log", Ecarx_log ]
    ],
    codeMemory: "EVE1_PROG",
    // dataMemory: "DMEM",
    dataMemory: "EVE1_PROG",
    // stackMemory: "DMEM"
    stackMemory: "EVE1_PROG"
    };


    Build.platformTable["ti.platforms.evmTDA3XX:ipu1"] = {
    externalMemoryMap: [
    [ "IPU1_PROG", {
    name: "IPU1_PROG", space: "code/data", access: "RWX",
    base: 0x86000000, len: 0x1000000,
    comment: "IPU1 Program Memory (16 MB)"
    }],
    /* [ "IPU1_PROG", {
    name: "IPU1_PROG", space: "code/data", access: "RWX",
    base: 0x8C800000, len: 0x1000000,
    comment: "IPU1 Program Memory (16 MB)"
    }],*/
    [ "SR_0", SR_0 ],
    [ "Ecarx_log", Ecarx_log ]
    ],
    codeMemory: "IPU1_PROG",
    dataMemory: "IPU1_PROG",
    stackMemory: "IPU1_PROG"
    };

    var ipu1_ammu = {
    prog: { /* program memory */
    pa: 0x86000000,
    size: "Large_32M",
    cache: "CachePolicy_CACHEABLE"
    },
    sr0: { /* SR_0 data memory (non-cacheable) */
    pa: 0x8E000000,
    size: "Large_32M",
    cache: "CachePolicy_NON_CACHEABLE"
    },
    ecarx_log: { /* ecarx_log data memory (non-cacheable) */
    pa: 0x87000000,
    size: "Large_32M",
    cache: "CachePolicy_NON_CACHEABLE"
    }
    };

    Build.platformTable["ti.platforms.evmTDA3XX:ipu1-0"] = {
    customMemoryMap: memory,
    externalMemoryMap: [
    [ "IPU1_0_PROG", {
    name: "IPU1_0_PROG", space: "code/data", access: "RWX",
    base: 0x86000000, len: 0x800000,
    comment: "IPU1-0 Program Memory (8 MB)"
    }],
    [ "SR_0", SR_0 ],
    [ "Ecarx_log", Ecarx_log ]
    ],
    codeMemory: "IPU1_0_PROG",
    dataMemory: "IPU1_0_PROG",
    stackMemory: "IPU1_0_PROG"
    };

    var ipu1_0_ammu = {
    prog: { /* program memory */
    pa: 0x86000000,
    size: "Large_32M",
    cache: "CachePolicy_CACHEABLE"
    },
    sr0: { /* SR_0 data memory (non-cacheable) */
    pa: 0x8E000000,
    size: "Large_32M",
    cache: "CachePolicy_NON_CACHEABLE"
    },
    ecarx_log: { /* ecarx_log data memory (non-cacheable) */
    pa: 0x87000000,
    size: "Large_32M",
    cache: "CachePolicy_NON_CACHEABLE"
    }
    };

    Build.platformTable["ti.platforms.evmTDA3XX:ipu1-1"] = {
    externalMemoryMap: [
    [ "IPU1_1_PROG", {
    name: "IPU1_1_PROG", space: "code/data", access: "RWX",
    base: 0x86800000, len: 0x800000,
    comment: "IPU1-1 Program Memory (8 MB)"
    }],
    [ "SR_0", SR_0 ],
    [ "Ecarx_log", Ecarx_log ]
    ],
    codeMemory: "IPU1_1_PROG",
    dataMemory: "IPU1_1_PROG",
    stackMemory: "IPU1_1_PROG"
    };

    /*
    * ======== ti.targets.elf.C66 ========
    */
    var C66 = xdc.useModule('ti.targets.elf.C66');
    C66.ccOpts.suffix += " -mi10 -mo -pdr -pden -pds=238 -pds=880 -pds1110 ";
    Build.targets.$add(C66);

  • In reply to user5892527:

    Hi,

    as Anuj is out of office I will ping other VisionSDK experts to help, they will reply here soon.

    Regards,

    Yordan

  • In reply to user5892527:

    As mentioned by Anuj, you have to make sure IPU AMMU is configured to have memory segment non-cacheable.

    Depending on how you execute your program, if you are using CCS to load and run your program, GEL script can already initialize the IPU AMMU for you.

    The GEL file CCS use to configure IPU AMMU is TDA3xx_multicore_reset.gel which can be found under CCS installation folder typically, i.e. C:\ti\ccsv8\ccs_base\emulation\gel\TDA3x.

    SYSBIOS can also initialize IPU AMMU. Example can be found under ~/vision_sdk/links_fw/src/rtos/bios_app_common/tda3xx/ipu1_0/Ammu1_bios.cfg.

    Vision SDK sets 0xA000_0000 IPU memory region as non-cacheable and remote log memory section resides in that region.

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