---
layout: figure
figureUrl: /dramsys.svg
figureCaption: The PIM-HBM model integrated into DRAMSys
---

## Virtual Prototype
### Processing Units
<hr/>

---
layout: figure-side
figureUrl: /data_structures.svg
figureCaption: The PIM-HBM model integrated into DRAMSys
---

## Virtual Prototype
### Software Library
<hr/>

<br>
<br>

- Software support library written in Rust
- Provides data structures for PIM-HBM
  - Adhering special memory layout requirements
- Executes programmed microkernels

---
layout: figure-side
figureUrl: /bare_metal.svg
---

## Virtual Prototype
### Platform
<hr/>

<br>
<br>

- Bare-metal kernel executes on ARM processor model
- Custom page table configuration
  - Non-PIM DRAM region mapped as cacheable memory
  - PIM DRAM region mapped as non-cacheable memory

---

<hr/>

<br>
<br>
GEMV Microkernel

```asm{none|1-8|9,10|11|all}{lines:true}
MOV GRF_A #0, BANK
MOV GRF_A #1, BANK
MOV GRF_A #2, BANK
MOV GRF_A #3, BANK
MOV GRF_A #4, BANK
MOV GRF_A #5, BANK
MOV GRF_A #6, BANK
MOV GRF_A #7, BANK
MAC(AAM) GRF_B, BANK, GRF_A
JUMP -1, 7
FILL BANK, GRF_B #0
EXIT
```