Subversion Repositories neorv32

<<<

:sectnums:

==== Data Memory (DMEM)

[cols="<3,<3,<4"]

[frame="topbot",grid="none"]

|=======================

| Hardware source file(s): | neorv32_dmem.entity.vhd      | entity-only definition

|                          | mem/neorv32_dmem.default.vhd | default _platform-agnostic_ memory architecture

| Software driver file(s): | none                         | _implicitly used_

| Top entity port:         | none                         |

| Configuration generics:  | _MEM_INT_DMEM_EN_            | implement processor-internal DMEM when _true_

|                          | _MEM_INT_DMEM_SIZE_          | DMEM size in bytes

| CPU interrupts:          | none                         |

|=======================

[NOTE]

The actual DMEM is split into two design files: a plain entity definition (`neorv32_dmem.entity.vhd`) and the actual

architecture definition (`mem/neorv32_dmem.default.vhd`). This **default architecture** provides a _generic_ and

_platform independent_ memory design that (should) infers embedded memory block. You can replace/modify the architecture

source file in order to use platform-specific features (like advanced memory resources) or to improve technology mapping

and/or timing.

Implementation of the processor-internal data memory is enabled via the processor's _MEM_INT_DMEM_EN_

generic. The size in bytes is defined via the _MEM_INT_DMEM_SIZE_ generic. If the DMEM is implemented,

the memory is mapped into the data memory space and located right at the beginning of the data memory

space (default `dspace_base_c` = 0x80000000). The DMEM is always implemented as RAM.