RTOS/AM5746: Memory allocation

Kaka,

When you want to split the memory for each core, I assumed that you want to run different programs in each. If you run the cores in SMP, you don't need to do this.

Below is an example how we did this:

our IPC examples append “ipu1-0” and “ipu1-1” to the evmDRA7XX platform:

C:\ti\am57xx-5.1\ipc_3_50_01_01\examples\DRA7XX_bios_elf\ex02_messageq\shared\Config.bld:

Build.platformTable["ti.platforms.evmDRA7XX:ipu1-0"] = {

   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 ]

   ],

   codeMemory:  "IPU1_0_PROG",

   dataMemory:  "IPU1_0_PROG",

   stackMemory: "IPU1_0_PROG"

};

Build.platformTable["ti.platforms.evmDRA7XX: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 ]

   ],

   codeMemory:  "IPU1_1_PROG",

   dataMemory:  "IPU1_1_PROG",

   stackMemory: "IPU1_1_PROG"

};

And then we change the platform in CCS:

You can apply the same idea to A15.

Regards, Eric

Hi,

"To summary your comments, customer can manage the memory to separate the memory address by each cores by making the platform library via bld file. Right?" Yes, this is right.

"Also, did you have IPU example working on CCS? If yes, would you please share with it?"
Almost all driver examples has IPU support, like A15 and C66x. You can use pdkprojectcreate to create a driver example for M4, then you will get a CCS project to build and run. Note the driver examples use single core, no matter A15, or C66x or M4.

If you are looking for SMP examples for M4, the only one we have is POSIX SMP example, which I am confirming with dev team how to test and run, the user guide has no such info.

Regards, Eric