| 1 |
$Id: TODO,v 1.176 2005/11/13 00:14:05 debug Exp $ |
$Id: TODO,v 1.324 2006/07/22 10:23:39 debug Exp $ |
| 2 |
|
|
| 3 |
NOTE: This TODO is hopefully out-of-date. I don't keep it updated. |
Hm. This file is in random order, and not all parts of it are up-to-date. |
| 4 |
|
|
| 5 |
=============================================================================== |
Code cleanup: |
| 6 |
|
x) 64-bit ranges in src/cpus/memory_mips_v2p.c |
| 7 |
Old MIPS bintrans: |
x) Revert the dyntrans page template experiment? Hm. |
| 8 |
x) call/return address cache? |
x) Refactor the cpu type detection/initialization/listing. |
| 9 |
x) Turn the MIPS cpu family stuff into dyntrans. |
|
| 10 |
|
Documentation: |
| 11 |
|
x) Rewrite the section about experimental devices, after the |
| 12 |
|
framebuffer acceleration has been implemented, and demos |
| 13 |
|
written. (Symbolic names instead of numbers; example |
| 14 |
|
use cases, etc. Mention demo files that use the various |
| 15 |
|
features?) |
| 16 |
|
x) "a very simple linear framebuffer device (for graphics output)" |
| 17 |
|
under "which machines does gxemul emulate" ==> better |
| 18 |
|
description? |
| 19 |
|
x) Better description on how to set up a cross compiler? |
| 20 |
|
Example for MIPS64. |
| 21 |
|
|
| 22 |
|
Long-term implementation: |
| 23 |
|
x) Testmachine includes: |
| 24 |
|
+ dev_fb block fill and copy |
| 25 |
|
+ dev_fb draw characters (from the built-in font)? |
| 26 |
|
+ dev_fb input device? mouse pointer coordinates and buttons |
| 27 |
|
(allow changes in these to cause interrupts as well?) |
| 28 |
|
+ Redefine the halt() function so that it stops "sometimes |
| 29 |
|
soon", i.e. usage in demo code should be: |
| 30 |
|
for (;;) { |
| 31 |
|
halt(); |
| 32 |
|
} |
| 33 |
|
x) Rewrite the networking stack; make OpenBSD work better as a guest |
| 34 |
|
OS, fix the performance problems, make Linux work with DHCP, etc. |
| 35 |
|
x) Make the wdc controller work with modern versions of NetBSD! |
| 36 |
|
x) Continue on SPARC emulation |
| 37 |
|
+ Enable it in the configure script as soon as it can |
| 38 |
|
run all the demo programs. |
| 39 |
|
x) Continue on Alpha emulation (virtual memory, etc). Cleanup. |
| 40 |
|
x) Alignment exceptions (MIPS, PPC, ARM?, ...) |
| 41 |
|
|
| 42 |
|
Long-term design: |
| 43 |
|
x) Instruction combination collisions? How to avoid easily... |
| 44 |
|
o) Actually use the settings object, better debugger stuff, etc! |
| 45 |
|
o) Debugger command for enabling/disabling instruction statistics |
| 46 |
|
during runtime. machine.statistics = on|off |
| 47 |
|
x) MAINBUS REDESIGN! |
| 48 |
|
x) Clock framework! Go through all clock devices, make sure they |
| 49 |
|
return correct data, and run at correct speeds! |
| 50 |
|
x) Dyntrans with valgrind-inspired memory checker. (In memory_rw, |
| 51 |
|
it would be reasonably simple to add; in each individual fast |
| 52 |
|
load/store routine = a lot more work, and it would become |
| 53 |
|
kludgy very fast.) |
| 54 |
|
x) Dyntrans with SMP... lots of work to be done here. |
| 55 |
|
x) Dyntrans with cache emulation... lots of work here as well. |
| 56 |
|
x) Reimplement the config file parser from scratch. |
| 57 |
|
|
| 58 |
|
Test: |
| 59 |
|
x) Test with more than one Sprite instance on an emulated network! |
| 60 |
|
x) NetBSD 4.x, once it is out. |
| 61 |
|
|
| 62 |
|
------------------------------------------------------------------------------- |
| 63 |
|
|
| 64 |
|
Simple Valgrind-like checks? |
| 65 |
|
o) Mark every address with bits which tell whether or not the address |
| 66 |
|
has been written to. |
| 67 |
|
o) What should happen when programs are loaded? Text/data, bss (zero |
| 68 |
|
filled). But stack space and heap is uninitialized. |
| 69 |
|
o) Uninitialized local variables: |
| 70 |
|
A load from a place on the stack which has not previously |
| 71 |
|
been stored to => warning. Increasing the stack pointer using |
| 72 |
|
any available means should reset the memory to uninitialized. |
| 73 |
|
o) If calls to malloc() and free() can be intercepted: |
| 74 |
|
o) Access to a memory area after free() => warning. |
| 75 |
|
o) Memory returned by malloc() is marked as not-initialized. |
| 76 |
|
o) Non-passive, but good to have: Change the argument |
| 77 |
|
given to malloc, to return a slightly larger memory |
| 78 |
|
area, i.e. margin_before + size + margin_after, |
| 79 |
|
and return the pointer + margin_before. |
| 80 |
|
Any access to the margin_before or _after space results |
| 81 |
|
in warnings. (free() must be modified to free the |
| 82 |
|
actually allocated address.) |
| 83 |
|
|
| 84 |
|
SMP: |
| 85 |
|
o) dev_mp doesn't work well with dyntrans yet |
| 86 |
|
o) In general, IPIs, CAS, LL/SC etc must be made to work with dyntrans |
| 87 |
|
|
| 88 |
|
MIPS: |
| 89 |
|
+) Some more work on opcodes. |
| 90 |
|
x) MIPS64 revision 2. |
| 91 |
|
o) Find out which actual CPUs implement the rev2 ISA! |
| 92 |
|
x) _MAYBE_ TX79 and R5900 actually differ in their |
| 93 |
|
opcodes? Check this carefully! |
| 94 |
|
o) Dyntrans: Count register updates are probably not 100% correct yet. |
| 95 |
|
o) Refactor code for performance and readability/maintainability. |
| 96 |
|
o) Instruction combinations? Possible candidates (but profile first!): |
| 97 |
|
o) R2000/R3000 cache cleaner! |
| 98 |
|
o) strlen, memset loops etc |
| 99 |
|
o) multiple loads/stores in a row, e.g. relative to |
| 100 |
|
the stack pointer |
| 101 |
|
o) lui + or, lui + add, and 64-bit variants |
| 102 |
|
o) jr ra + addiu to the v0 register? |
| 103 |
|
o) compare + branch |
| 104 |
|
o) DROTR32 and similar MIPS64 rev 2 instructions, which have |
| 105 |
|
a rotation bit which differs from previous ISAs. |
| 106 |
|
o) EI and DI instructions for MIPS64/32 rev 2. NOTE: These are |
| 107 |
|
_NOT_ the same as for R5900! |
| 108 |
|
o) (Re)implement 128-bit loads/stores for R5900. |
| 109 |
|
o) R4000 and others: |
| 110 |
|
x) watchhi/watchlo exceptions, and other exception |
| 111 |
|
handling details |
| 112 |
|
o) R10000 and others: (R12000, R14000 ?) |
| 113 |
|
x) memory space, exceptions, ... |
| 114 |
|
x) use cop0 framemask for tlb lookups |
| 115 |
|
(http://techpubs.sgi.com/library/tpl/cgi-bin/getdoc.cgi/hdwr/bks/SGI_Developer/books/R10K_UM/sgi_html/t5.Ver.2.0.book_284.html) |
| 116 |
|
|
| 117 |
Dyntrans: |
Dyntrans: |
| 118 |
x) Separate data and instruction translations? |
x) Redesign/rethink the delay slot mechanism used for e.g. MIPS, |
| 119 |
x) Generalize the inline quick_pc_to_pointers? |
so that it caches a translation (that is, an instruction |
| 120 |
x) Call/return hints... |
word and the instr_call it was translated to the last |
| 121 |
x) More 64-bit stuff. |
time), so that it doesn't need to do slow |
| 122 |
|
to_be_translated for each end of page? |
| 123 |
|
x) Program Counter statistics: |
| 124 |
|
Per machine? What about SMP? All data to the same file? |
| 125 |
|
A debugger command should be possible to use to enable/ |
| 126 |
|
disable statistics gathering. |
| 127 |
|
Configuration file option! |
| 128 |
|
x) Common fatal_abort() function, which drops into the debugger |
| 129 |
|
without continuing. |
| 130 |
|
x) INVALIDATION should cause translations in _all_ cpus to be |
| 131 |
|
invalidated, e.g. on a write to a write-protected page |
| 132 |
|
(containing code) |
| 133 |
|
x) Call/return hints? |
| 134 |
|
x) 16-bit encodings? (MIPS16, ARM Thumb, SH3, ...) |
| 135 |
|
x) H8? |
| 136 |
x) Lots of other stuff: see src/cpus/README_DYNTRANS |
x) Lots of other stuff: see src/cpus/README_DYNTRANS |
| 137 |
|
x) true recompilation backend? think carefully about this, |
| 138 |
|
experiment in a separate project (not in GXemul) |
| 139 |
|
o) First test would be to just implement a simple |
| 140 |
|
instruction such as MIPS' addiu or lui, on AMD64 |
| 141 |
|
hosts... |
| 142 |
|
x) Idle loop detection? (Depends on target.) Could be turned |
| 143 |
|
into usleep(1) or similar on the host... except when doing |
| 144 |
|
e.g. SMP emulation. Then it becomes trickier. |
| 145 |
|
|
| 146 |
|
Alpha: |
| 147 |
|
o) Virtual memory (tlbs etc) |
| 148 |
|
o) Get {NetBSD,OpenBSD,Linux}/alpha booting. :) |
| 149 |
|
|
| 150 |
|
SPARC: |
| 151 |
|
o) Add all registers (floating point, control regs etc) |
| 152 |
|
o) Save/restore register windows etc! |
| 153 |
|
o) Load/stores! |
| 154 |
|
o) Disassemly of some more instructions? |
| 155 |
|
o) Are sll etc 32-bit sign-extending or zero-extending? |
| 156 |
|
o) Finish the cmp (subcc) flag computation code. |
| 157 |
|
o) Finish the GDB register stuff. |
| 158 |
|
o) SPARC v8, v7 etc? |
| 159 |
|
|
| 160 |
|
Debugger: |
| 161 |
|
o) How does SMP debugging work? Does it simply use "threads"? |
| 162 |
|
What if the guest OS (running on an emulated SMP machine) |
| 163 |
|
has a usertask running, with userland threads? |
| 164 |
|
o) Try to make the debugger more modular and, if possible, reentrant! |
| 165 |
|
o) Remove the emul command? (But show network info if showing |
| 166 |
|
machines?) |
| 167 |
|
o) Generalize the expression evaluator. (debugger_expr.c?) |
| 168 |
|
settable variables ("show nr of instructions on average") |
| 169 |
|
emul[x] defaults to current emul |
| 170 |
|
machine[x] defaults to current machine |
| 171 |
|
cpu[x] defaults to currently focused cpu |
| 172 |
|
registers cpu arch dependent (#-prefix) |
| 173 |
|
symbols @-prefix |
| 174 |
|
numeric constants decimal, hex, and octal ($-prefix) |
| 175 |
|
boolean yes,no, true,false |
| 176 |
|
operators (+ - * / % & | ^ !) |
| 177 |
|
parentheses for grouping subexpressions |
| 178 |
|
NOTE: the change from % to # for register prefix! |
| 179 |
|
examples: |
| 180 |
|
emul[0].machine[2].cpu[0].pc |
| 181 |
|
machine[test2].cpu[1].ra = main |
| 182 |
|
settings.show_trace_tree = yes |
| 183 |
|
|
| 184 |
|
Settings: |
| 185 |
|
o) Remove a setting. |
| 186 |
|
o) Read/write a setting given a name. (Read as |
| 187 |
|
string and/or int64_t simultaneously?) |
| 188 |
|
o) Warnings when exiting the emulator, if the |
| 189 |
|
settings have not been removed exactly in |
| 190 |
|
the same way as they were added? This would |
| 191 |
|
improve code cleanliness in the long term. |
| 192 |
|
(I.e. require a corresponding _destroy() |
| 193 |
|
function for all _new functions... machine_ |
| 194 |
|
cpu_ etc.) |
| 195 |
|
|
| 196 |
|
Help command should have subsections! One for "expressions", |
| 197 |
|
mirrored in the documentation, but the internal help should |
| 198 |
|
be the one that should be considered correct. |
| 199 |
|
o) see src/debugger.c for more |
| 200 |
|
|
| 201 |
|
POWER/PowerPC: |
| 202 |
|
x) PPC optimizations; instr combs |
| 203 |
|
x) 64-bit stuff: either Linux on G5, or perhaps some hobbyist |
| 204 |
|
version of AIX? (if there exists such a thing) |
| 205 |
|
x) find and fix the bug which causes NetBSD/macppc to fail after |
| 206 |
|
an install! |
| 207 |
|
x) macppc: adb controller; keyboard (for framebuffer mode) |
| 208 |
|
x) make OpenBSD/macppc work (PCI controller stuff) |
| 209 |
|
|
| 210 |
|
Algor: |
| 211 |
|
PCI and ISA and LOCAL interrupts! --> wdc could start working |
| 212 |
|
Add interrupt controller in dev_algor.c. |
| 213 |
|
|
| 214 |
|
ARM: |
| 215 |
|
o) try to get netbsd/evbarm 3.x running (iq80321) |
| 216 |
|
o) make the xscale counter registers (ccnt) work |
| 217 |
|
o) make the ata controller usable for FreeBSD! |
| 218 |
|
o) zaurus for openbsd... |
| 219 |
|
o) debian/cats crashes because of unimplemented coproc stuff. |
| 220 |
|
fix this? |
| 221 |
|
|
| 222 |
|
Cache simulation: |
| 223 |
|
o) Command line flags for: |
| 224 |
|
o) CPU endianness? |
| 225 |
|
o) Cache sizes? (multiple levels) |
| 226 |
|
o) Separate from the CPU concept, so that multi-core CPUs sharing |
| 227 |
|
e.g. a L2 cache can be simulated (?) |
| 228 |
|
o) Instruction cache emulation is easiest (if separate from the |
| 229 |
|
data cache); similar hack as the S;I; hack in cpu_dyntrans.c. |
| 230 |
|
NOTE: if the architecture has a delay slot, then an instruction |
| 231 |
|
slot can actually be executed as 2 instructions. |
| 232 |
|
o) Data cache emulation = harder; each arch's load/store routines |
| 233 |
|
must include support? running one instruction at a time and |
| 234 |
|
having a cpu-dependant lookup function for each instruction |
| 235 |
|
is another option (easier to implement, but very very slow). |
| 236 |
|
|
| 237 |
|
Documentation: |
| 238 |
|
o) machines, cpus, devices. |
| 239 |
|
o) Automagic documentation generation: |
| 240 |
|
x) REMEMBER that several machines/devices can be in |
| 241 |
|
the same source file! |
| 242 |
|
o) Try to rewrite the install instructions for those machines |
| 243 |
|
that use 3MAX into using CATS? (To remove the need to a raw |
| 244 |
|
ffs partition using up all of the disk image.) |
| 245 |
|
|
| 246 |
|
More generic out_of_memory error reporting, and check everywhere! |
| 247 |
|
Causes: OpenBSD has low default limits for normal users. |
| 248 |
|
Host is 32-bit? (32-bit hosts are limited to 4 GB or less |
| 249 |
|
of userspace memory.) |
| 250 |
|
You are actually low on RAM. (As trivial as this might sound, |
| 251 |
|
Unix systems usually allow processes to allocate virtual |
| 252 |
|
memory beyond the amount of RAM in the machine.) |
| 253 |
|
|
| 254 |
|
Breakpoints: 32-bit vs 64-bit sign extension for MIPS, warnings, etc. |
| 255 |
|
Use the debugger's symbolic name stuff. (which will have to be |
| 256 |
|
extended soon to support stuff like "2*x + symbol + y" etc. cool |
| 257 |
|
stuff) |
| 258 |
|
|
| 259 |
|
The Device subsystem: |
| 260 |
|
x) allow devices to be moved and/or changed in size (down to a |
| 261 |
|
minimum size, etc, or up to a max size) |
| 262 |
|
x) keep track of interrupts and busses? actually, allowing any device |
| 263 |
|
to be a bus might be a nice idea. |
| 264 |
|
x) turn interrupt controllers into devices? :-) |
| 265 |
|
x) refactor various clocks/nvram/cmos into one device? |
| 266 |
|
|
| 267 |
|
Clocks: |
| 268 |
|
x) General framework for automagic clock adjustment for _all_ |
| 269 |
|
kinds of clocks and timers. (Which should be possible to turn |
| 270 |
|
off, of course, like the way DECstation emulation works now.) |
| 271 |
|
|
| 272 |
|
PCI: |
| 273 |
|
x) last write was ffffffff ==> fix this, it should be used |
| 274 |
|
together with a mask to get the correct bits. also, not ALL |
| 275 |
|
bits are size bits! (lowest 4 vs lowest 2?) |
| 276 |
|
x) add support for address fixups |
| 277 |
|
x) generalize the interrupt routing stuff (lines etc). this should |
| 278 |
|
be per machine? or per bus, that's better |
| 279 |
|
x) add a "pcn" NIC (AMD PCnet32 Lance 79c970 (PCI 1022:2000)), |
| 280 |
|
could be useful for several machine modes (Malta, Algor, evbarm, |
| 281 |
|
hp700?, macppc, etc.) |
| 282 |
|
|
| 283 |
|
Network layer: |
| 284 |
|
o) DHCP (for Debian and BSD installers :-) |
| 285 |
|
o) increase performance |
| 286 |
|
o) don't rely on NetBSD-ish usage |
| 287 |
|
o) Multiple networks per emulation, and let different |
| 288 |
|
NICs in machines connect to different networks. |
| 289 |
|
o) many other issues: see src/net.c |
| 290 |
|
|
| 291 |
|
Busses: |
| 292 |
|
o) Redesign the entire "mainbus" concept! |
| 293 |
|
o) Busses should be placed in a hierarchical tree! |
| 294 |
|
o) Easily configurable interrupt routing in SMP systems. |
| 295 |
|
o) Specific clock/bus speeds, cpu speeds etc. |
| 296 |
|
o) Synchronization over network? or at least in dyntrans within |
| 297 |
|
one emulated machine |
| 298 |
|
o) dev->bus: TurboChannel, PCMCIA, ADB? |
| 299 |
|
|
| 300 |
|
Config file parser: |
| 301 |
|
o) Rewrite it from scratch! |
| 302 |
|
o) Usage of any expression available through the debugger |
| 303 |
|
o) Support for running debugger commands (like the -c |
| 304 |
|
command line option) |
| 305 |
|
|
| 306 |
|
Floating point layer: |
| 307 |
|
o) make it common enough to be used by _all_ emulation modes |
| 308 |
|
o) implement more stuff |
| 309 |
|
o) non-IEEE modes (i.e. x86)? |
| 310 |
|
|
| 311 |
Userland emulation: |
Userland emulation: |
| 312 |
x) Lots of stuff. |
x) Lots of stuff; freebsd and netbsd (and linux?) syscalls. |
| 313 |
x) Dynamic linking? Hm. |
x) Dynamic linking? Hm. |
| 314 |
|
|
| 315 |
Misc: |
Sound: |
| 316 |
Redesign the entire "mainbus" concept: |
x) generic sound framework |
| 317 |
o) Easily configurable interrupt routing in SMP systems. |
x) add one or more sound cards as devices |
| 318 |
o) Specific clock/bus speeds, cpu speeds etc. |
|
| 319 |
o) Synchronization over network? |
ASC SCSI controller: |
| 320 |
|
x) NetBSD/arc 2.0 uses the ASC controller in a way which GXemul |
| 321 |
Caches / memory hierarchies: (this is mostly MIPS-specific) |
cannot yet handle. (NetBSD 1.6.2 works ok.) (Possibly a problem |
| 322 |
o) MIPS coproc.c: bits in config registers should reflect |
in NetBSD itself, http://mail-index.netbsd.org/source-changes/ |
| 323 |
correct cache sizes for _all_ CPU types. (currently only |
2005/11/06/0024.html suggests that.) |
| 324 |
implemented for R4000, R1x000, and a few others) |
|
| 325 |
o) src/memory*.c: Implement correct cache emulation for |
Caches / memory hierarchies: (this is mostly MIPS-specific) |
| 326 |
all CPU types. (currently only R2000/R3000 is implemented) |
o) src/memory*.c: Implement correct cache emulation for |
| 327 |
(per CPU, multiple levels should be possible, |
all CPU types. (currently only R2000/R3000 is implemented) |
| 328 |
associativity etc!) |
(per CPU, multiple levels should be possible, associativity etc!) |
| 329 |
o) R2000/R3000 isn't _100%_ correct, just almost correct :) |
o) R2000/R3000 isn't _100%_ correct, just almost correct :) |
| 330 |
o) Move the -S (fill mem with random) functionality into the |
o) Move the -S (fill mem with random) functionality into the |
| 331 |
memory.c subsystem, not machine.c or wherever it is now |
memory.c subsystem, not machine.c or wherever it is now |
| 332 |
o) ECC stuff, simulation of memory errors? (Machine dependant) |
o) ECC stuff, simulation of memory errors? (Machine dependent) |
| 333 |
o) More than 4GB of emulated RAM, when run on a 32-bit host? |
o) More than 4GB of emulated RAM, when run on a 32-bit host? |
| 334 |
(using manual swap-out of blocks to disk, ugly) |
(using manual swap-out of blocks to disk, ugly) |
| 335 |
o) A global command line option should be used to turn |
o) A global command line option should be used to turn |
| 336 |
cache emulation on or off. When off, caches should be |
cache emulation on or off. When off, caches should be |
| 337 |
faked like they are right now. When on, caches and |
faked like they are right now. When on, caches and |
| 338 |
memory latencies should be emulated as correctly as |
memory latencies should be emulated as correctly as |
| 339 |
possible. |
possible. |
| 340 |
|
|
| 341 |
Network layer: |
File/disk/symbol handling: |
| 342 |
o) Multiple networks per emulation, and let different |
o) Remove some of the complexity in file format guessing, for |
| 343 |
NICs in machines connect to different networks. |
Ultrix kernels that are actually disk images? |
| 344 |
o) many other issues: see src/net.c |
o) Better handling of tape files |
| 345 |
|
o) Read function argument count and types from binaries? (ELF?) |
| 346 |
MIPS CPU emulation: |
o) Better demangling of C++ names. Note: GNU's C++ differs from e.g. |
| 347 |
o) i386 bintrans backend: movn etc, slt[u] for |
Microsoft's C++, so multiple schemes must be possible. See |
| 348 |
64-bit mode, 64-bit shifts etc |
URL at top of src/symbol_demangle.c for more info. |
| 349 |
o) Instructions: |
|
| 350 |
o) All ISAs: |
Userland ABI emulation: |
| 351 |
o) Floating point exception handling, and |
o) see src/useremul.c |
| 352 |
add more instructions. |
|
| 353 |
o) Finish the MIPS16 translator, and test it! |
Terminal/console: |
| 354 |
o) MIPS ISA I, II, III, IV |
o) allow emulated serial ports to be connected to the outside |
| 355 |
o) MIPS V (SIMD vector stuff?) |
world in a more generic way, or even to other emulated |
| 356 |
o) MDMX (MIPS Digital Media Extension) |
machines(?) |
| 357 |
o) MIPS 3D |
|
| 358 |
o) MIPS MT (Multi-thread stuff) (What's this?) |
Save state of the whole emulated machine, to be able to load it back |
| 359 |
o) Warn about mis-used bit fields (ie bits that |
in later? (Memory, all device's states, all registers and |
| 360 |
should be all zeroes, warn about if they are not)! |
so on. Like taking a snapshot. (SimOS seems to do this, |
| 361 |
Both for coprocessor registers and for instruction |
according to its website.)) |
| 362 |
opcodes. |
|
| 363 |
o) the special2 stuff is a mess right now |
Better framebuffer and X-windows functionality: |
| 364 |
o) warn and/or cause exceptions for unimplemented |
o) -Yx sometimes causes crashes. |
| 365 |
instructions (depending on CPU type) |
o) Simple device access to framebuffer_blockcopyfill() etc, |
| 366 |
o) R2000/R3000: |
and text output (using the built-in fonts), for dev_fb. |
| 367 |
x) R3000 "tri-byte stores". (What's this?) |
o) CLEAN UP the ugly event code |
| 368 |
o) R4000 and others: |
o) Mouse clicks can be "missed" in the current system; this is |
| 369 |
x) watchhi/watchlo exceptions, and other exception |
not good. They should be put on a stack of some kind. |
| 370 |
handling details |
o) More 2D and 3D framebuffer acceleration. |
| 371 |
o) R10000 and others: (R12000, R14000 ?) |
o) Non-resizable windows? Or choose scaledown depending |
| 372 |
x) memory space, exceptions, ... |
on size (and center the image, with a black border). |
| 373 |
x) use cop0 framemask for tlb lookups |
o) Different scaledown on different windows? |
| 374 |
(http://techpubs.sgi.com/library/tpl/cgi-bin/getdoc.cgi/hdwr/bks/SGI_Developer/books/R10K_UM/sgi_html/t5.Ver.2.0.book_284.html) |
o) Switch scaledown during runtime? (Ala CTRL-ALT-plus/minus) |
| 375 |
o) Implement load delays? Warnings on interlocks. |
o) Bug reported by Elijah Rutschman on MacOS with weird |
| 376 |
o) Implement all coprocessor 0 bits / functions. |
keys (F5 = cursor down?). |
| 377 |
x) coproc 0 selectors! (R4000 ?) |
o) Keyboard and mouse events: |
| 378 |
o) R4300 (nintendo64, no mmu?), R5900 (playstation2, weird |
x) Do this for more machines than just DECstation |
| 379 |
TLB/cache? 128-bit GPRs, new instructions), |
x) more X11 cursor keycodes |
| 380 |
4K (note: NOT R4000), 5K (note: NOT R5000), |
x) Keys like CTRL, ALT, SHIFT do not get through |
| 381 |
R6000 (ISA II), R8000 |
by themselves (these are necessary for example |
| 382 |
o) Multi-cpu stuff: |
to change the font of an xterm in X in the |
| 383 |
+) Interrupt routing (ie devices vs mainbus, or |
emulator) |
| 384 |
connect each device to a fixed cpu) |
o) Generalize the framebuffer stuff by moving _ALL_ X11 |
| 385 |
+) SGI's NUMA architecture. Study |
specific code to src/x11.c! |
| 386 |
x) Linux sources |
|
| 387 |
x) SGI's specs on NUMA address space |
Statistics: (this could be interesting) |
| 388 |
+) Ultrix? NetBSD doesn't do SMP on MIPS yet :-( |
o) Save to file and show graphics. It should be possible to |
| 389 |
+) Own experiments with ycx2. |
run gxemul after a simulation to just show the graphics, |
| 390 |
|
or convert to a .ppm or .tga or similar. |
| 391 |
File/disk handling: |
o) memory accesses (to measure cache efficiency and |
| 392 |
o) Better handling of tape files |
page coloring efficiency) |
| 393 |
|
o) nr of simultaneous ASIDs in use in the TLB, for MIPS |
| 394 |
Debugger: |
o) percentage of time spent in different "states", such as |
| 395 |
o) Read function argument count and types from binaries? (ELF?) |
running userland code, kernel code, or idling (for CPUs |
| 396 |
o) Demangle C++ names. |
that have such an instruction, or whenever the PC is |
| 397 |
o) see src/debugger.c for more stuff |
inside a specific idle-function (address range)). |
| 398 |
|
Possible additional state (for example on R3000): caches |
| 399 |
Userland ABI emulation: |
disabled. |
| 400 |
o) see src/useremul.c |
o) position of read/write on (SCSI) disks |
|
|
|
|
Terminal/console stuff: |
|
|
o) allow emulated serial ports to be connected to the outside |
|
|
world in a more generic way, or even to other emulated |
|
|
machines(!) |
|
|
|
|
|
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 |
|
|
so on. Like taking a snapshot. (SimOS seems to do this, |
|
|
according to its website.)) |
|
|
|
|
|
Better X-windows functionality: |
|
|
o) CLEAN UP the ugly event code |
|
|
o) Mouse clicks can be "missed" in the current system; this is |
|
|
not good. They should be put on a stack of some kind. |
|
|
o) More 2D and 3D framebuffer acceleration. |
|
|
o) Non-resizable windows? Or choose scaledown depending |
|
|
on size (and center the image, with a black border). |
|
|
o) Different scaledown on different windows? |
|
|
o) Switch scaledown during runtime? (Ala CTRL-ALT-plus/minus) |
|
|
o) Keyboard and mouse events: |
|
|
x) Do this for more machines than just DECstation |
|
|
x) more X11 cursor keycodes |
|
|
x) Keys like CTRL, ALT, SHIFT do not get through |
|
|
by themselves (these are necessary for example |
|
|
to change the font of an xterm in X in the |
|
|
emulator) |
|
|
o) Generalize the framebuffer stuff by moving _ALL_ X11 |
|
|
specific code to src/x11.c! |
|
|
|
|
|
Statistics: (this could be interesting) |
|
|
o) Save to file and show graphics. It should be possible to |
|
|
run gxemul after a simulation to just show the graphics, |
|
|
or convert to a .ppm or .tga or similar. |
|
|
o) memory accesses (to measure cache efficiency and |
|
|
page coloring efficiency) |
|
|
o) nr of simultaneous ASIDs in use in the TLB, for MIPS |
|
|
o) percentage of time spent in different "states", such as |
|
|
running userland code, kernel code, or idling (for CPUs |
|
|
that have such an instruction, or whenever the PC is |
|
|
inside a specific idle-function (address range)). |
|
|
Possible additional state (for example on R3000): caches |
|
|
disabled. |
|
|
o) position of read/write on (SCSI) disks |
|
| 401 |
|
|
Parent Directory
| 
Revision Log
| 
Patch