IRUSER Shared Memory: Difference between revisions
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=ReceiveBufferInfo/SendBufferInfo= | |||
(Information below is poorly verified against real hardware. Please help me verify them -- [[User:Wwylele|Wwylele]] ([[User talk:Wwylele|talk]])) | |||
The BufferInfo sections store data validity information for the two buffers | |||
{| class="wikitable" border="1" | |||
|- | |||
! Relative offset | |||
! Size | |||
! Description | |||
|- | |||
| 0x0 | |||
| 0x4 | |||
| Start index of valid packages | |||
|- | |||
| 0x4 | |||
| 0x4 | |||
| End index of valid packages | |||
|- | |||
| 0x8 | |||
| 0x4 | |||
| Number valid packages | |||
|- | |||
| 0xC | |||
| 0x4 | |||
| Unknown | |||
|} | |||
=ReceiveBuffer/SendBuffer= | |||
{| class="wikitable" border="1" | |||
|- | |||
! Relative offset | |||
! Size | |||
! Description | |||
|- | |||
| 0x0 | |||
| 0x8 * package_count (specified in Init parameter) | |||
| PackageInfo{u32 offset_to_data_buffer, u32 data_length} | |||
|- | |||
| 0x8 * package_count | |||
| buffer_size - 0x8 * package_count | |||
| Data buffer | |||
|} | |||
The buffers are two circular buffers. A new package is added to the end of previous package in the data buffer, with package info added to PackageInfo[end_index++]. Note that if an added package exceeds the end of the buffer, the exceeding data will be wrapped around to the beginning of the data buffer. | |||