Virtual Mobile Engine
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The VME appears to be one half of Sony's "Virtual Mobile Engine Concept 2" where a CPU would take care of "lightweight control tasks" and reconfigurable hardware logic (the VME) would do all of the "heavy work in a power efficient manner". See Virtual Mobile Engine - LSI that "Changes its Spots".
It might be something like a reconfigurable DSP; noone has been able to interpret its "firmware" yet. It can be accessed from the ME through the mfvme/mtvme instructions or through DMA with addresses from 0x440F8000 to 0x44100000 (excluded).
Features[edit | edit source]
- Works as Dynamic Reconfigurable vector engine
- Reconfigured on the fly
- One cycle context switch
- Coarse grain heterogeneous type
- Native 24bit data-width
- Max Clock Freq. 166MHz
Chip Layout[edit | edit source]
___________________128bit BUS_____________________
/\
||
|------||----------------------------------------|
| |----\/---| VME |---------------| |
| | Bus | | | |
| |Interface| | Local Memory | |
| | |<--------------->| | |
| | | |----/\------/\-| |
| | DMAC | || || |
| | | |---------| |----||---| || |
| | | | |-->|Address | || |
| | Control |-->| Context | |Generator| || |
| |Registers| |Registers| |---------| || |
| |---------| | | || |
| | | |------------\/--| |
| | |-->| | |
| |---------| | Reconfigurable | |
| | Datapath | |
| |----------------| |
|------------------------------------------------|