SPRS814D March 2012 – October 2019 TMS320C6655 , TMS320C6657
PRODUCTION DATA.
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The L2 memory configuration for the C665x device is as follows:
L2 memory can be configured as all SRAM, all 4-way set-associative cache, or a mix of the two. The amount of L2 memory that is configured as cache is controlled through the L2MODE field of the L2 Configuration Register (L2CFG) of the C66x CorePac. Figure 7-4 shows the available SRAM/cache configurations for L2. By default, L2 is configured as all SRAM after device reset.
Global addresses are accessible to all masters in the system. In addition, local memory can be accessed directly by the associated processor through aliased addresses, where the eight MSBs are masked to zero. The aliasing is handled within the C66x CorePac and allows for common code to be run unmodified on multiple cores. For example, address location 0x10800000 is the global base address for C66x CorePac Core 0's L2 memory. C66x CorePac Core 0 can access this location by either using 0x10800000 or 0x00800000. Any other master on the device must use 0x10800000 only. Conversely, 0x00800000 can by used by any of the cores as their own L2 base addresses.
For C66x CorePac Core 0, address 0x00800000 is equivalent to 0x10800000, and for C66x CorePac Core 1 (C6657 only) address 0x00800000 is equivalent to 0x11800000. Local addresses should be used only for shared code or data, allowing a single image to be included in memory. Any code/data targeted to a specific core, or a memory region allocated during run-time by a particular core should always use the global address only.