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

## Allocate (12 bytes)
[0]     -> 0
[1]     -> Page count
<!-- Currently this does not allocate here, check r1 for a ptr to alloc to -->
[2..10] -> ptr to alloc at

## Deallocate (12 bytes)
<!-- Currently this does not deallocate -->
[0]     -> 1
[1]     -> Page count
[2..10] -> ptr to dealloc from

## Map Device Into Memory
Typically only used for simple drivers such as vga.
<!-- Unimp -->
[0]      -> 2
[1]      -> Page count
[2..10]  -> HostID
[11..19] -> DeviceID

## Unmap Device From Memory
<!-- Unimp -->
[0]      -> 3
[1]      -> Page count
[2..10]  -> HostID
[11..19] -> DeviceID

## Set Memory Quota
<!-- unimp -->
[0]      -> 4
[1..9]   -> HostID
[10..18] -> ProcessID
[19]     -> Refer to the Memory Quota Table
[20..28] -> 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 -->
[0]      -> 4
[1..9]   -> HostID
[10..18] -> BufferID
[19]     -> Refer to the Buffer Quota Table
[20..28] -> 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.