/[gxemul]/trunk/TODO
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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revision 2 by dpavlin, Mon Oct 8 16:17:48 2007 UTC revision 14 by dpavlin, Mon Oct 8 16:18:51 2007 UTC
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1  $Id: TODO,v 1.125 2005/03/06 08:21:10 debug Exp $  $Id: TODO,v 1.173 2005/09/17 17:14:25 debug Exp $
2    
3  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.  
4    
5    High priority stuff:
6    
7    
8    Old MIPS bintrans:
9    
10            x)  call/return address cache?
11    
12            x)  Turn the MIPS cpu family stuff into dyntrans.
13    
14    
15    Dyntrans:
16    
17            x)  Lots of stuff: see src/cpus/README_DYNTRANS
18    
19    
20    Userland emulation:
21    
22            x)  Lots of stuff.
23    
24            x)  Dynamic linking? Hm.
25    
26    ===============================================================================
27    
28    Lower priority, but still important:
29    
30            Redesign the entire "mainbus" concept:
31                    o)  Easily configurable interrupt routing in SMP systems.
32                    o)  Specific clock/bus speeds, cpu speeds etc.
33                    o)  Synchronization over network?
34    
35          Caches / memory hierarchies: (this is mostly MIPS-specific)          Caches / memory hierarchies: (this is mostly MIPS-specific)
36                  o)  MIPS coproc.c: bits in config registers should reflect                  o)  MIPS coproc.c: bits in config registers should reflect
# Line 27  Order is random. Don't trust it to be up Line 55  Order is random. Don't trust it to be up
55          Network layer:          Network layer:
56                  o)  Multiple networks per emulation, and let different                  o)  Multiple networks per emulation, and let different
57                      NICs in machines connect to different networks.                      NICs in machines connect to different networks.
                 o)  Network across multiple hosts.  
                 o)  Fixed MAC addresses for NICs, fixed IPv4 addresses if  
                     DHCP or RARP is used.  
58                  o)  many other issues: see src/net.c                  o)  many other issues: see src/net.c
59    
         Configure script:  
                 o)  Only enable Alpha prefetch on pca56 etc, not on ev4, ev5.  
                 o)  Use getopts?  
                 o)  X11 libs and headers via command line option?  
                 o)  Verify that the configure script, building and running  
                     the emulator works on some platforms:  
                         +)  Irix, AIX, QNX  
                         +)  MacOS X  (I've not tried this personally yet)  
                         +)  Ultrix using gcc? (Inside the emulator)  
   
         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  
   
60          MIPS CPU emulation:          MIPS CPU emulation:
61                    o)  i386 bintrans backend: movn etc, slt[u] for
62                            64-bit mode, 64-bit shifts etc
63                  o)  Instructions:                  o)  Instructions:
64                          o)  Regression tests (see tests/README for more info):                          o)  All ISAs:
65                                  o)  Floating point exception handling, and                                  o)  Floating point exception handling, and
66                                          add more instructions.                                          add more instructions.
67                                  o)  Finish the MIPS16 translator, and test it!                                  o)  Finish the MIPS16 translator, and test it!
# Line 86  Order is random. Don't trust it to be up Line 94  Order is random. Don't trust it to be up
94                          4K (note: NOT R4000), 5K (note: NOT R5000),                          4K (note: NOT R4000), 5K (note: NOT R5000),
95                          R6000 (ISA II), R8000                          R6000 (ISA II), R8000
96                  o)  Multi-cpu stuff:                  o)  Multi-cpu stuff:
97                            +)  Interrupt routing (ie devices vs mainbus, or
98                                connect each device to a fixed cpu)
99                          +)  SGI's NUMA architecture. Study                          +)  SGI's NUMA architecture. Study
100                                  x)  Linux sources                                  x)  Linux sources
101                                  x)  SGI's specs on NUMA address space                                  x)  SGI's specs on NUMA address space
102                          +)  Ultrix?  NetBSD doesn't do SMP on MIPS yet :-(                          +)  Ultrix?  NetBSD doesn't do SMP on MIPS yet :-(
103                          +)  Own experiments with ycx2.                          +)  Own experiments with ycx2.
104    
         Emulation of specific machines and devices:  
                 o)  Clean up stuff to make it possible to emulate multiple  
                     (different) machines simultaneously.  
                 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)  Cobalt:  PCI and interrupt system, ethernet,  
                         harddisk controller(s)  
                 o)  Playstation 2:  
                         Hardware:  OHCI usb controller, keyboard, IDE, ...  
                         Has an R3000A as a subsystem (!)  
                 o)  hpcmips:  framebuffer(s) and harddisk controller,  
                         among other things  
                 o)  newsmips:  
                         o)  NetBSD/newsmips, get it to detect a "real"  
                             model, right now everything is 100% bogus  
                 o)  Less interesting platforms:  
                         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)  
   
105          File/disk handling:          File/disk handling:
                 o)  Read function argument count and types from binaries? (ELF?)  
                 o)  ELF: separate LE/BE (MIPS instruction format) from LSB/MSB  
                         (ELF structure format)?  
106                  o)  Better handling of tape files                  o)  Better handling of tape files
107    
108            Debugger:
109                    o)  Read function argument count and types from binaries? (ELF?)
110                    o)  Demangle C++ names.
111                    o)  see src/debugger.c for more stuff
112    
113          Userland ABI emulation:          Userland ABI emulation:
114                  o)  see src/useremul.c                  o)  see src/useremul.c
115    
116          Terminal based interactive debugger:          Terminal/console stuff:
117                  o)  see src/debugger.c                  o)  allow emulated serial ports to be connected to the outside
118                        world in a more generic way, or even to other emulated
119          GDB interface? (Maybe not necessary; the built-in debugger feels                      machines(!)
         more useful.)  
   
         GUI, interactive debugger?  GTK+?  (The GUI _must be optional_!)  
                 o)  Breakpoints (complex expressions? combinations of register  
                         states, memory accesses and so on)  
                 o)  Instruction trace  
                 o)  Disassembly of RAM (_NOT_ the same as instruction trace)  
                 o)  Function call trace  
                 o)  Inspection of CPU registers/state, coprocessor  
                         registers/state, any device registers/state/contents  
                         o)  Framebuffers in windows / tabs.  
                         o)  Contents of RAM  
                 o)  "Start new emulation" should allow amount of  
                         RAM and nr of cpus to easily be specified.  
                         Multiple simultaneous machines should be possible.  
                 o)  Disk images.  
120    
121          Regression tests:          Regression tests.  (Needs to be totally rewritten, the old framework
122                  o)  see tests/                  was removed because it was useless.)
123    
124          Save state of the whole emulated machine, to be able to load it back          Save state of the whole emulated machine, to be able to load it back
125                  in later?  (Memory, all device's states, all registers and                  in later?  (Memory, all device's states, all registers and
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