TDA4VM: c7x L2 RAM size

hi, all:

         from this link https://software-dl.ti.com/jacinto7/esd/processor-sdk-rtos-jacinto7/07_03_00_07/exports/docs/psdk_rtos/docs/user_guide/developer_notes_dma_kernel.html

I learn that C7x has internal L2 ram, but I can't find this L2 ram specification in any datasheet, 

for example , the image below does not show c7x has L2RAM 

so , what exactly is this L2 RAM stands for? Can I find the size of it?

I'm also confuse about how can I alloc L1/L2 cpu cache? according to function  tivxMemAlloc(in "./tiovx/source/platform/psdk_j7/common/tivx_mem.c"), it's more like DDR memory heap