First pass at 0.1.0 release notes.

RELEASES.md

@@ -0,0 +1,89 @@
+# Releases
+
+## AcadiaOS 0.1.0 (2023-12-08)
+
+This marks the first release of AcadiaOS! There is very little user functionality currently but a
+lot of foundational work has been done.
+
+### Zion Kernel
+
+Capability-based microkernel.
+
+Boot Process:
+- Initializes GDT and IDT.
+- Sets up a separate stack for page faults and general protection faults.
+- Enables SSE.
+- Minimally initializes the APIC in order to use its timer as well as map the PS/2 Keyboard and PCI
+interrupts.
+- Enables Syscalls using the sysenter instruction.
+- Enables the scheduler.
+- Loads the Yellowstone init program and yields to it.
+
+Features:
+- Physical memory manager can dole out single pages as well as continuous chunks. Freed pages and
+chunks can be reused.
+- Kernel memory allocation done primarily using a slab allocator for sizes up to 128 bytes. (Larger
+allocations are done by simply incrementing a pointer and are never truly freed. However currently 
+none occur.).
+- Round robin scheduler with a single priority level.
+
+Interface:
+- Capability-based interface.
+- Process Management: ProcessInit, ProcessExit.
+- Thread Management: ThreadCreate, ThreadStart, ThreadExit.
+- Memory Management: MemoryObjectCreate, MemoryObjectCreateContiguous, MemoryObjectCreatePhysical,
+MemoryObjectDuplicate, MemoryObjectInspect, AddressSpaceMap, AddressSpaceUnmap.
+- IPC with Channels, Ports, and Endpoints.
+- Channel: ChannelCreate, ChannelSend, ChannelRecv.
+- Ports: PortCreate, PortSend, PortRecv, PortPoll.
+- Endpoints: EndpointCreate, EndpointSend, EndpointRecv, ReplyPortSend, ReplyPortRecv.
+- Capability Management: CapDuplicate, CapRelease.
+- Irq Management: IrqRegister.
+- Synchronization: ProcessWait, ThreadWait, MutexCreate, MutexLock, MutexRelease, SemaphoreCreate,
+SemaphoreWait, SemaphoreSignal.
+- Debug Output: Debug.
+
+### Yellowstone
+
+Initialization process that starts up the other necessary boot processes then maintains a registry
+of the available IPC Servers running on the system.
+
+- Spawns the AHCI Client "Denali".
+- Once it is online, reads the GPT and spawns the VFS service "VictoriaFallS".
+- Once it is online, reads "init.txt" and spawns the processes listed in the file from the /bin dir.
+
+
+### Denali
+
+Barebones AHCI Driver.
+
+- Reads the SATA PCI region the HBAs associated with it.
+- Starts the Denali service to allow clients to read directly from disk. 
+- Currently only one command port is used so reads are done in serial.
+
+### VictoriaFallS
+
+Barebones VFS Server. Currently passes all calls to it directly to the ext2 filesystem at the root
+of the VFS.
+
+- Allows reading of files and directories.
+- Does not cache results or inodes so all calls go directly to the AHCI Server.
+
+
+### Teton
+
+Very basic terminal and shell.
+
+- Supports ls, pwd, cd, and exec commands.
+- All commands must use absolute paths.
+- Starts a child process when using exec and waits for it to complete.
+
+### Yunq
+
+IDL for IPC on AcadiaOS with cpp codegen for messages, clients, and servers.
+
+- Supports serializing capabilities for IPC.
+- Supports repeated integer fields.
+- Supports string files.
+- Allows namespacing cpp definitions.
+