/[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 10 by dpavlin, Mon Oct 8 16:18:27 2007 UTC revision 20 by dpavlin, Mon Oct 8 16:19:23 2007 UTC
# Line 1  Line 1 
1  $Id: TODO,v 1.139 2005/06/23 06:55:43 debug Exp $  $Id: TODO,v 1.176 2005/11/13 00:14:05 debug Exp $
2    
3  Here's a short list of what I have left to do on GXemul. This file is a mess.  NOTE: This TODO is hopefully out-of-date. I don't keep it updated.
4  Order is random. Don't trust it to be up-to-date.  
5    ===============================================================================
6    
7    Old MIPS bintrans:
8            x)  call/return address cache?
9            x)  Turn the MIPS cpu family stuff into dyntrans.
10    
11    Dyntrans:
12            x)  Separate data and instruction translations?
13            x)  Generalize the inline quick_pc_to_pointers?
14            x)  Call/return hints...
15            x)  More 64-bit stuff.
16            x)  Lots of other stuff: see src/cpus/README_DYNTRANS
17    
18    Userland emulation:
19            x)  Lots of stuff.
20            x)  Dynamic linking? Hm.
21    
22    Misc:
23            Redesign the entire "mainbus" concept:
24                    o)  Easily configurable interrupt routing in SMP systems.
25                    o)  Specific clock/bus speeds, cpu speeds etc.
26                    o)  Synchronization over network?
27    
28          Caches / memory hierarchies: (this is mostly MIPS-specific)          Caches / memory hierarchies: (this is mostly MIPS-specific)
29                  o)  MIPS coproc.c: bits in config registers should reflect                  o)  MIPS coproc.c: bits in config registers should reflect
# Line 28  Order is random. Don't trust it to be up Line 50  Order is random. Don't trust it to be up
50                      NICs in machines connect to different networks.                      NICs in machines connect to different networks.
51                  o)  many other issues: see src/net.c                  o)  many other issues: see src/net.c
52    
         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.  
   
53          MIPS CPU emulation:          MIPS CPU emulation:
54                    o)  i386 bintrans backend: movn etc, slt[u] for
55                            64-bit mode, 64-bit shifts etc
56                  o)  Instructions:                  o)  Instructions:
57                          o)  Regression tests (see tests/README for more info):                          o)  All ISAs:
58                                  o)  Floating point exception handling, and                                  o)  Floating point exception handling, and
59                                          add more instructions.                                          add more instructions.
60                                  o)  Finish the MIPS16 translator, and test it!                                  o)  Finish the MIPS16 translator, and test it!
# Line 74  Order is random. Don't trust it to be up Line 87  Order is random. Don't trust it to be up
87                          4K (note: NOT R4000), 5K (note: NOT R5000),                          4K (note: NOT R4000), 5K (note: NOT R5000),
88                          R6000 (ISA II), R8000                          R6000 (ISA II), R8000
89                  o)  Multi-cpu stuff:                  o)  Multi-cpu stuff:
90                            +)  Interrupt routing (ie devices vs mainbus, or
91                                connect each device to a fixed cpu)
92                          +)  SGI's NUMA architecture. Study                          +)  SGI's NUMA architecture. Study
93                                  x)  Linux sources                                  x)  Linux sources
94                                  x)  SGI's specs on NUMA address space                                  x)  SGI's specs on NUMA address space
95                          +)  Ultrix?  NetBSD doesn't do SMP on MIPS yet :-(                          +)  Ultrix?  NetBSD doesn't do SMP on MIPS yet :-(
96                          +)  Own experiments with ycx2.                          +)  Own experiments with ycx2.
97    
         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)  
   
98          File/disk handling:          File/disk handling:
                 o)  Read function argument count and types from binaries? (ELF?)  
99                  o)  Better handling of tape files                  o)  Better handling of tape files
100    
101            Debugger:
102                    o)  Read function argument count and types from binaries? (ELF?)
103                    o)  Demangle C++ names.
104                    o)  see src/debugger.c for more stuff
105    
106          Userland ABI emulation:          Userland ABI emulation:
107                  o)  see src/useremul.c                  o)  see src/useremul.c
108    
         Terminal based interactive debugger:  
                 o)  see src/debugger.c  
   
109          Terminal/console stuff:          Terminal/console stuff:
110                  o)  allow emulated serial ports to be connected to the outside                  o)  allow emulated serial ports to be connected to the outside
111                      world in a more generic way, or even to other emulated                      world in a more generic way, or even to other emulated
112                      machines(!)                      machines(!)
113    
114          Regression tests:  (Should be totally rewritten.)          Regression tests.  (Needs to be totally rewritten, the old framework
115                  o)  see tests/                  was removed because it was useless.)
116    
117          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
118                  in later?  (Memory, all device's states, all registers and                  in later?  (Memory, all device's states, all registers and
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