--- trunk/TODO	2007/10/08 16:18:27	10
+++ trunk/TODO	2007/10/08 16:18:38	12
@@ -1,7 +1,59 @@
-$Id: TODO,v 1.139 2005/06/23 06:55:43 debug Exp $
+$Id: TODO,v 1.166 2005/08/16 05:44:33 debug Exp $
 
-Here's a short list of what I have left to do on GXemul. This file is a mess.
-Order is random. Don't trust it to be up-to-date.
+===============================================================================
+
+High priority stuff:
+
+
+MIPS bintrans:
+	x)  call/return address cache?
+
+dyntrans:
+	x)  memory write protection for ARM, but NOT for Alpha (because
+		it has the IMB instruction... hm)
+
+	x)  call/return address cache
+
+	x)  instr_call sequence analysis support? (Useful for
+		handtuning combinations.)
+
+	x)  opcode statistics support?
+		TODO: is instr_call statistics enough?
+
+	x)  support for archs that allow transparent unaligned load/stores
+
+	x)  SMP: detect when an instruction such as ll/sc or cas is used,
+	    and "synchronize" approximately the number of executed instructions
+	    (or cycles) across all CPUs.
+
+	x)  support for variable-length instructions (x86, m68k, ...)
+		Perhaps:  don't increase the next_ic between every
+		instruction, but let each instruction's handler do
+		that for itself.
+		Problem: what about instructions crossing a (virtual)
+			page boundary? They cannot be translated once
+			and for all :( and must be interpreted slowly!
+
+	x)  support for THUMB or MIPS16  (arm, mips)
+
+	x)  support for Delay slots!  (mips, sparc, hppa)
+
+	x)  Alpha: hahaha, zapnot and inserts/extracts don't
+	    compile into very nice code :-|  fix this
+
+	x)  64-bit virtual memory translation tables (PPC, etc)
+
+	x)  x86: convert to dyntrans. LOTS of stuff to consider.
+
+
+===============================================================================
+
+Lower priority, but still important:
+
+	Redesign the entire "mainbus" concept:
+		o)  Easily configurable interrupt routing in SMP systems.
+		o)  Specific clock/bus speeds, cpu speeds etc.
+		o)  Synchronization over network?
 
 	Caches / memory hierarchies: (this is mostly MIPS-specific)
 		o)  MIPS coproc.c: bits in config registers should reflect
@@ -28,20 +80,11 @@
 		    NICs in machines connect to different networks.
 		o)  many other issues: see src/net.c
 
-	CPU emulation:
-		o)  Binary translation:
-			+)  use an Intermediate Representation!
-			+)  recursive translation?
-			+)  basic blocks instead of one-instruction? :)
-			+)  on Alpha: don't assume pca56-like byte load/store?
-			+)  write backends for UltraSparc and MIPS
-			+)  see src/bintrans.c for more info
-		o)  Dynamic-but-not-binary translation?
-		o)  All the non-MIPS modes need a bit of work.
-
 	MIPS CPU emulation:
+		o)  i386 bintrans backend: movn etc, slt[u] for
+			64-bit mode, 64-bit shifts etc
 		o)  Instructions:
-			o)  Regression tests (see tests/README for more info):
+			o)  All ISAs:
 				o)  Floating point exception handling, and
 					add more instructions.
 				o)  Finish the MIPS16 translator, and test it!
@@ -74,63 +117,21 @@
 			4K (note: NOT R4000), 5K (note: NOT R5000),
 			R6000 (ISA II), R8000
 		o)  Multi-cpu stuff:
+			+)  Interrupt routing (ie devices vs mainbus, or
+			    connect each device to a fixed cpu)
 			+)  SGI's NUMA architecture. Study
 				x)  Linux sources
 				x)  SGI's specs on NUMA address space
 			+)  Ultrix?  NetBSD doesn't do SMP on MIPS yet :-(
 			+)  Own experiments with ycx2.
 
-	Emulation of specific machines and devices:
-		o)  Use same clock for all emulations and machines.
-		o)  Clean up the device stuff (registering of devices etc)
-		o)  Various SCSI and IDE controllers
-		o)  PS/2-style keyboard controller (for several machines)
-		o)  Generic busses;
-			x)  PCI:  i/o and interrupts
-			x)  QBus-22 (DECsystem 5500, 5400?)
-		o)  DECstations (pmax):
-			x)  ioasic
-			x)  framebuffers:
-				+)  better cursor support, overlays?,
-				+)  2D/3D acceleration, PX[G]
-			x)  status words / control words, make this more
-				portable/cleaner
-			x)  scsi controller(s): sii, DMA for asc
-			x)  serial controllers: ssc, scc (and more work on dc?)
-			x)  nvram on decstation 5000/125:  when using X11,
-				set console=g or similar
-			x)  DECstation 5840? "xbi-based SMP"
-		o)  SGI and ARC machines (sgimips, arc):
-			x)  IP32 ("O2"): (Lots of stuff)
-				+)  mec (ethernet)
-				+)  pci
-				+)  ahc (scsi)
-				+)  ps2 kbd
-				+)  memory controller
-				+)  framebuffer/graphics
-				+)  caches
-			x)  more ARCBIOS stuff
-			x)  Memory/interrupt controllers
-			x)  IP30 (Linux with graphics support?)
-			x)  SMP / NUMA?  (SGI and various ARC machines)
-		o)  Playstation 2:
-			Hardware:  OHCI usb controller, keyboard, ...
-		o)  Less interesting platforms:
-			o)  newsmips:
-				o)  NetBSD/newsmips, get it to detect a "real"
-				    model, right now everything is 100% bogus
-			o)  mipsco? (NetBSD)
-			o)  wgrisc? (big endian R3000, in OpenBSD's attic)
-			o)  other embedded / evaluation MIPS boards
-			o)  Playstation 1? R3000A. Weird hardware?
-				No FPU, but something as coproc 2.
-			o)  Nintendo 64, http://www.nintendo.com/systems/n64/n64_specs.jsp
-				(R4300, 4MB RAM, really weird memory map)
-
 	File/disk handling:
-		o)  Read function argument count and types from binaries? (ELF?)
 		o)  Better handling of tape files
 
+	Debugger:
+		o)  Read function argument count and types from binaries? (ELF?)
+		o)  Demangle C++ names.
+
 	Userland ABI emulation:
 		o)  see src/useremul.c
 
@@ -142,8 +143,8 @@
 		    world in a more generic way, or even to other emulated
 		    machines(!)
 
-	Regression tests:  (Should be totally rewritten.)
-		o)  see tests/
+	Regression tests.  (Needs to be totally rewritten, the old framework
+		was removed because it was useless.)
 
 	Save state of the whole emulated machine, to be able to load it back
 		in later?  (Memory, all device's states, all registers and