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[docs] IMEM/DMEM: add legacy-style architectures

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stnolting 2023-11-04 22:18:51 +01:00
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12
docs/datasheet/soc_dmem.adoc
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@ -7,6 +7,7 @@
|=======================
| Hardware source file(s): | neorv32_dmem.entity.vhd | entity-only definition
| | mem/neorv32_dmem.default.vhd | default _platform-agnostic_ memory architecture
| | mem/neorv32_dmem.legacy.vhd | alternative legacy-style 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`
@ -27,11 +28,12 @@ physical memory size of 64kB).
.VHDL Source File
[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.
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 infers embedded memory blocks (blockRAM). The default architecture can
be replaced by platform-specific modules in order to use platform-specific features or to improve technology mapping
and/or timing. A "legacy-style" memory architecture is provided in `rtl/mem` that can be used if the synthesis does
not correctly infer blockRAMs.
.Execute from RAM
[TIP]

10
docs/datasheet/soc_imem.adoc
View file

@ -7,6 +7,7 @@
|=======================
| Hardware source file(s): | neorv32_imem.entity.vhd | entity-only definition
| | mem/neorv32_imem.default.vhd | default _platform-agnostic_ memory architecture
| | mem/neorv32_imem.legacy.vhd | alternative legacy-style memory architecture
| Software driver file(s): | none | _implicitly used_
| Top entity port: | none |
| Configuration generics: | `MEM_INT_IMEM_EN` | implement processor-internal IMEM when `true`
@ -39,10 +40,11 @@ physical memory size of 64kB).
.VHDL Source File
[NOTE]
The actual IMEM is split into two design files: a plain entity definition (`neorv32_imem.entity.vhd`) and the actual
architecture definition (`mem/neorv32_imem.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.
architecture definition `mem/neorv32_imem.default.vhd`. This **default architecture** provides a _generic_ and
_platform independent_ memory design that infers embedded memory blocks (blockRAM). The default architecture can
be replaced by platform-specific modules in order to use platform-specific features or to improve technology mapping
and/or timing. A "legacy-style" memory architecture is provided in `rtl/mem` that can be used if the synthesis does
not correctly infer blockRAMs.
.Read-Only Access
[NOTE]