SC Communication
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Introduction
- The following information was reverse engineered from lv0ldr, lv0, lv1, and sc_iso.self.
- Big thanks to graf_chokolo for a large part of the basis of this page!
Overview of Syscon Communication
- Syscon lives at the mmio space of 0x24000080000.
- Communication occurs through mmio read/writes.
List of known offsets in Syscon:
| Offset (from start of address space) | Size | Description |
|---|---|---|
| 0xC000 | 0xFF0 | Syscon packet send area |
| 0xCFF0 | 0x4 | Syscon sent packet counter |
| 0xCFF4 | 0x4 | Syscon sent packet acknowledge counter |
| 0xD000 | 0xFF0 | Syscon packet receive area |
| 0xDFF0 | 0x4 | Syscon received packet counter |
| 0xDFF4 | 0x4 | Syscon received packet acknowledge counter |
| 0xE100 | 0x4 | Tells syscon there is a packet to be received |
Quick explanation of the packet counters:
- There are two counters that are incremented by each side (Cell / Syscon).
- 0xCFF0 and 0xDFF0 are incremented by the sending side (Syscon for 0xCFF0, Cell for 0xDFF0)
- 0xCFF4 and 0xDFF4 are incremented by the receiving side (Cell for 0xCFF4, Syscon for 0xDFF4)
Syscon Services
- To be completed...
| Service ID | Description |
|---|---|
| 0x14 | NVS Service - Used for eeprom read/write (Non-Volatile Storage?) |
| 0x18 | Livelock(?) Service - Checks for permission to use other services |
| 0xFF | Syscon Init (Seen in lv0ldr init sequence to syscon: http://www.ps3devwiki.com/wiki/User_talk:JuanNadie) |