ableos/sysdata/spec/Memory Service spec.md

# Memory service spec
The memory service uses the first byte in the message to identify the request type.

## Allocate (12 bytes)
[U8]     -> 0
[U8]     -> Page count
<!-- Currently this does not allocate here, check r2 for a ptr to alloc to -->
[U64] -> ptr to alloc at

## Deallocate (12 bytes)
<!-- Currently this does not deallocate -->
[U8]     -> 1
[U8]     -> Page count
[U64]    -> ptr to dealloc from

## Map Device Into Memory
Typically only used for simple drivers such as vga.
<!-- Unimp -->
[U8]      -> 2
[U8]      -> Page count
[U64]  -> HostID
[U64] -> DeviceID

## Unmap Device From Memory
<!-- Unimp -->
[U8]      -> 3
[U8]      -> Page count
[U64]  -> HostID
[U64] -> DeviceID

## Set Memory Quota
<!-- unimp -->
[U8]      -> 4
[U64]   -> HostID
[U64] -> ProcessID
[U8]     -> Refer to the Memory Quota Table
[U64] -> Memory quota. In pages of memory. Multiply by 4096 to get the total byte count.

### Memory Quota Table
0 -> No quota.
1 -> Soft quota. Notifies the process supervisor.
2 -> Hard quota. Refuses to allocate above the quota.
3 -> Kill quota. Kill the process and notify the supervisor when the process tries to allocate above the quota.

## Set Buffer Quota
<!-- unimp -->
[U8]      -> 4
[U64]   -> HostID
[U64] -> BufferID
[U8]     -> Refer to the Buffer Quota Table
[U64] -> Buffer quota. In pages of memory. Multiply by 4096 to get the total byte count.

### Buffer Quota Table
<!-- Because of the abusability of buffers there is no Kill Quota -->
0 -> No quota
1 -> Soft quota. Notify supervisor of quota violation Buffer Message
2 -> Hard quota. Return an error message to the process that sent the message.