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$Id: TODO,v 1.343 2006/08/14 18:46:30 debug Exp $ |
$Id: TODO,v 1.410 2006/11/06 05:32:38 debug Exp $ |
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Hm. This file is in random order, and not all parts of it are up-to-date. |
This file is my list of things I want to work on in the future. It is in |
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random order, and some parts of it are probably out-to-date by now. |
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Implementation: |
Dyntrans: |
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x) ARM "wait"-like instruction. |
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x) CLOCK FRAMEWORK! |
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x) Mouse support for NetBSD/pmax 4.x! |
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x) See netwinder_reset() in NetBSD; the current "an internal error |
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occured" message after reboot/halt is too ugly. |
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x) 64-bit ranges in src/cpus/memory_mips_v2p.c |
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x) Revert the dyntrans page template experiment? Hm. |
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x) Refactor the cpu type detection/initialization/listing. |
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Macro, which can be used as long as the cpu definitions |
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contain a 'name'? |
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x) Testmachine includes: |
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+ dev_fb block fill and copy |
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+ dev_fb draw characters (from the built-in font)? |
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+ dev_fb input device? mouse pointer coordinates and buttons |
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(allow changes in these to cause interrupts as well?) |
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+ Redefine the halt() function so that it stops "sometimes |
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soon", i.e. usage in demo code should be: |
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for (;;) { |
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halt(); |
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} |
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x) Continue on SPARC emulation |
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+ Enable it in the configure script as soon as it can |
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run all the demo programs. |
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x) Continue on Alpha emulation (virtual memory, etc). Cleanup. |
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x) Nicer MIPS status bits in register dumps. |
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x) Alignment exceptions (MIPS, PPC, ARM?, ...) |
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x) Rewrite the networking stack; make OpenBSD work better as a guest |
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OS, fix the performance problems, make Linux work with DHCP, etc. |
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Support VDE (vde.sf.net)? Allow SLIP connections, possibly PPP, |
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in addition to ethernet? |
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x) Implement more ethernet NICs. |
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x) IOP (I2O) device? |
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Documentation: |
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x) "Install netbsd/pmax first" => only use the install kernel? |
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x) Rewrite the section about experimental devices, after the |
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framebuffer acceleration has been implemented, and demos |
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written. (Symbolic names instead of numbers; example |
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use cases, etc. Mention demo files that use the various |
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features?) |
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x) "a very simple linear framebuffer device (for graphics output)" |
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under "which machines does gxemul emulate" ==> better |
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description? |
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x) Better description on how to set up a cross compiler? |
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Example for MIPS64. |
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Long-term design: |
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x) Instruction combination collisions? How to avoid easily... |
x) Instruction combination collisions? How to avoid easily... |
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x) Think about how to do both SHmedia and SHcompact in a reasonable |
x) Think about how to do both SHmedia and SHcompact in a reasonable |
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way! |
way! (Or AMD64 long/protected/real, for that matter.) |
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o) Actually use the settings object, better debugger stuff, etc! |
x) 68K emulation; think about how to do variable instruction |
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o) Debugger command for enabling/disabling instruction statistics |
lengths across page boundaries. |
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during runtime. machine.statistics = on|off |
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x) MAINBUS REDESIGN! |
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x) PCI redesign... I need to read up on how PCI actually works :) |
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x) Clock framework! Go through all clock devices, make sure they |
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return correct data, and run at correct speeds! |
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x) Dyntrans with valgrind-inspired memory checker. (In memory_rw, |
x) Dyntrans with valgrind-inspired memory checker. (In memory_rw, |
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it would be reasonably simple to add; in each individual fast |
it would be reasonably simple to add; in each individual fast |
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load/store routine = a lot more work, and it would become |
load/store routine = a lot more work, and it would become |
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kludgy very fast.) |
kludgy very fast.) |
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x) Dyntrans with SMP... lots of work to be done here. |
x) Dyntrans with SMP... lots of work to be done here. |
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x) Dyntrans with cache emulation... lots of work here as well. |
x) Dyntrans with cache emulation... lots of work here as well. |
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x) Reimplement the config file parser from scratch. |
o) dev_mp doesn't work well with dyntrans yet |
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o) In general, IPIs, CAS, LL/SC etc must be made to work with dyntrans |
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------------------------------------------------------------------------------- |
x) Redesign/rethink the delay slot mechanism used for e.g. MIPS, |
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so that it caches a translation (that is, an instruction |
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word and the instr_call it was translated to the last |
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time), so that it doesn't need to do slow |
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to_be_translated for each end of page? |
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x) Program Counter statistics: |
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Per machine? What about SMP? All data to the same file? |
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A debugger command should be possible to use to enable/ |
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disable statistics gathering. |
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Configuration file option! |
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x) Breakpoints: |
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o) Physical vs virtual addresses! |
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o) 32-bit vs 64-bit sign extension for MIPS, and others? |
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x) INVALIDATION should cause translations in _all_ cpus to be |
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invalidated, e.g. on a write to a write-protected page |
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(containing code) |
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x) 16-bit encodings? (MIPS16, ARM Thumb, 32-bit SH on SH64) |
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x) Lots of other stuff: see src/cpus/README_DYNTRANS |
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x) true recompilation backend? think carefully about this, |
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experiment in a separate project (not in GXemul) |
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o) First test would be to just implement a simple |
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instruction such as MIPS' addiu or lui, on AMD64 |
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hosts... |
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Simple Valgrind-like checks? |
Simple Valgrind-like checks? |
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o) Mark every address with bits which tell whether or not the address |
o) Mark every address with bits which tell whether or not the address |
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in warnings. (free() must be modified to free the |
in warnings. (free() must be modified to free the |
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actually allocated address.) |
actually allocated address.) |
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SMP: |
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o) dev_mp doesn't work well with dyntrans yet |
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o) In general, IPIs, CAS, LL/SC etc must be made to work with dyntrans |
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MIPS: |
MIPS: |
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+) Some more work on opcodes. |
o) Nicer MIPS status bits in register dumps. |
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x) The "wait" instruction. How to implement this functionality? |
o) Alignment exceptions. |
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(SMP, non-MIPS, interrupt correctness, host idling, ...) |
o) Floating point exception correctness. |
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o) Fix this? Triggered by NetBSD/sgimips? Hm: |
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to_be_translated(): TODO: unimplemented instruction: |
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000000000065102c: 00200800 (d) rot_00 at,zr,0 |
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o) Some more work on opcodes. |
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x) MIPS64 revision 2. |
x) MIPS64 revision 2. |
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o) Find out which actual CPUs implement the rev2 ISA! |
o) Find out which actual CPUs implement the rev2 ISA! |
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o) DROTR32 and similar MIPS64 rev 2 instructions, |
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which have a rotation bit which differs from |
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previous ISAs. |
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o) EI and DI instructions for MIPS64/32 rev 2. |
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NOTE: These are _NOT_ the same as for R5900! |
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x) _MAYBE_ TX79 and R5900 actually differ in their |
x) _MAYBE_ TX79 and R5900 actually differ in their |
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opcodes? Check this carefully! |
opcodes? Check this carefully! |
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o) Dyntrans: Count register updates are probably not 100% correct yet. |
o) Dyntrans: Count register updates are probably not 100% correct yet. |
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o) Refactor code for performance and readability/maintainability. |
o) Refactor code for performance and readability/maintainability. |
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o) DROTR32 and similar MIPS64 rev 2 instructions, which have |
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a rotation bit which differs from previous ISAs. |
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o) EI and DI instructions for MIPS64/32 rev 2. NOTE: These are |
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_NOT_ the same as for R5900! |
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o) (Re)implement 128-bit loads/stores for R5900. |
o) (Re)implement 128-bit loads/stores for R5900. |
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o) R4000 and others: |
o) R4000 and others: |
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x) watchhi/watchlo exceptions, and other exception |
x) watchhi/watchlo exceptions, and other exception |
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x) use cop0 framemask for tlb lookups |
x) use cop0 framemask for tlb lookups |
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(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) |
(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) |
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Dyntrans: |
SuperH: |
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x) Redesign/rethink the delay slot mechanism used for e.g. MIPS, |
x) DMA (0xffa00000) |
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so that it caches a translation (that is, an instruction |
x) Instruction tracing should include symbols for branch targets, |
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word and the instr_call it was translated to the last |
and so on... |
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time), so that it doesn't need to do slow |
x) SH4 interrupt controller: |
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to_be_translated for each end of page? |
x) Implement correct priorities of interrupts |
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x) Program Counter statistics: |
x) SH4 BSC (Bus State Controller) |
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Per machine? What about SMP? All data to the same file? |
x) NetBSD/evbsh3, dreamcast, mmeye, hpcsh! Linux? |
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A debugger command should be possible to use to enable/ |
x) Replace pc-relative loads with immediate load, if within the |
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disable statistics gathering. |
same page. (Similar to the same optimization for ARM.) |
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Configuration file option! |
x) Floating point exception correctness. |
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x) Common fatal_abort() function, which drops into the debugger |
x) Floating point speed! |
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without continuing. |
x) Think carefully about how to implement SH5/SH64 (for evbsh5). |
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x) INVALIDATION should cause translations in _all_ cpus to be |
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invalidated, e.g. on a write to a write-protected page |
Dreamcast: |
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(containing code) |
x) CD image bootup: |
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x) 16-bit encodings? (MIPS16, ARM Thumb, SH3, ...) |
0) Find IP.BIN, and load it to 0x8c008000. |
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x) Lots of other stuff: see src/cpus/README_DYNTRANS |
1) Run code at 0x8c008300 (SEGA license code). |
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x) true recompilation backend? think carefully about this, |
2) When the license code runs a "boot menu" syscall, |
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experiment in a separate project (not in GXemul) |
load the 1ST_READ.BIN file (unscrambled?) to 0x8c010000. |
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o) First test would be to just implement a simple |
3) Run code at 0x8c00b800 (Bootstrap 1). This will in turn |
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instruction such as MIPS' addiu or lui, on AMD64 |
jump to 0x8c00e000 (Bootstrap 2), and then jump to |
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hosts... |
0x8c010000, to start the program. |
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x) Idle loop detection? (Depends on target.) Could be turned |
(Try with e.g. Comstedt's Serial IP Slave, to make sure it |
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into usleep(1) or similar on the host... except when doing |
works as expected.) |
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e.g. SMP emulation. Then it becomes trickier. |
x) LAN adapter. |
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x) PVR: Lots of stuff. See dev_pvr.c. |
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x) Maple bus: |
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x) Correct controller input |
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x) Mouse input |
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x) PROM/BIOS calls: |
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x) GD-ROM emulation |
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x) NetBSD/dreamcast: Root on nfs? |
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x) Linux/dreamcast? (The gentoo kernel currently crashes.) |
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x) More homebrew demos/games. |
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x) Sound emulation (ARM cpu). |
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x) VME processor emulation? |
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Transputer: |
Transputer: |
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x) Implement support for Helios binaries. |
x) Implement support for Helios binaries. |
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x) Figure out how to boot an entire Helios distribution. |
x) Figure out how to boot an entire Helios distribution. |
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x) Implement all instructions. :) |
x) Implement all instructions. :) |
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RCA1802/RCA1805, CHIP8: |
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x) CHIP8 -> RCA180x conversion |
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x) Think about how to do dual-mode, variable-instr-length |
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ISAs, and switch between modes. |
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x) 1805 "extended" opcode -> trigger CHIP8 emulation? |
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That is, all calls 0NNN could point to 0x68 opcodes, |
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which, if running on a 1802 in CHIP8-emulation-mode, |
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would be manually interpreted. |
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x) Better solution: |
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CHIP8 calls to 00xx => handle at high level, |
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calls to 0xxx in general = call 180X machine code |
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(0000 = reboot?) |
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x) 1802 info: http://www.nyx.net/~lturner/public_html/Cosmac.html |
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and: http://www.elf-emulation.com/1802.html |
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x) 1805 extended opcodes: Implement at least disassembly support! |
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x) Keyboard input. |
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x) Sound (beep only). |
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x) Slow-down to correct speed? Wikipedia: "it was usually operated |
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at 3.58 MHz/2 to suit the requirements of the 1861 chip which |
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gave a speed of a little over 100,000 instructions per second" |
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(Note that _CHIP8_ emulation would then be even slower.) |
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x) SCHIP48 (Super) emulation: |
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Some more opcodes, 128x64 framebuffer, larger |
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sprites and fonts. |
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Alpha: |
Alpha: |
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o) Virtual memory (tlbs etc) |
x) OSF1 PALcode, Virtual memory support. |
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o) Get {NetBSD,OpenBSD,Linux}/alpha booting. :) |
x) PALcode replacement! PAL1E etc opcodes...? |
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x) Interrupt/exception/trap handling. |
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x) Floating point exception correctness. |
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x) More work on bootup memory and register contents. |
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x) More Alpha machine types, so it could work with |
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OpenBSD, FreeBSD, and Linux too? |
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SPARC: |
SPARC: |
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o) Load/stores to alternate address spaces! |
o) Implement Adress space identifiers; load/stores etc. |
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o) Save/restore register windows etc! |
o) Save/restore register windows etc! |
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o) Finish the subcc and addcc flag computation code. |
o) Finish the subcc and addcc flag computation code. |
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o) Add more registers (floating point, control regs etc) |
o) Add more registers (floating point, control regs etc) |
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o) Exception/trap handling. |
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o) Disassemly of some more instructions? |
o) Disassemly of some more instructions? |
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o) Are sll etc 32-bit sign-extending or zero-extending? |
o) Are sll etc 32-bit sign-extending or zero-extending? |
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o) Finish the GDB register stuff. |
o) Finish the GDB register stuff. |
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x) Floating point exception correctness. |
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o) SPARC v8, v7 etc? |
o) SPARC v8, v7 etc? |
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Debugger: |
Debugger: |
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o) Try to make the debugger more modular and, if possible, reentrant! |
o) Try to make the debugger more modular and, if possible, reentrant! |
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o) Remove the emul command? (But show network info if showing |
o) Remove the emul command? (But show network info if showing |
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machines?) |
machines?) |
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o) Generalize the expression evaluator. (debugger_expr.c?) |
o) Settings: |
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settable variables ("show nr of instructions on average") |
x) Special handlers for Write! |
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emul[x] defaults to current emul |
+) MIPS coproc regs |
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machine[x] defaults to current machine |
+) Alpha/MIPS/SPARC zero registers |
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cpu[x] defaults to currently focused cpu |
+) x86 64/32/16-bit registers |
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registers cpu arch dependent (#-prefix) |
x) Value formatter for resulting output. |
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symbols @-prefix |
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numeric constants decimal, hex, and octal ($-prefix) |
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boolean yes,no, true,false |
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operators (+ - * / % & | ^ !) |
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parentheses for grouping subexpressions |
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NOTE: the change from % to # for register prefix! |
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examples: |
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emul[0].machine[2].cpu[0].pc |
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machine[test2].cpu[1].ra = main |
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settings.show_trace_tree = yes |
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Settings: |
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o) Remove a setting. |
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o) Read/write a setting given a name. (Read as |
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string and/or int64_t simultaneously?) |
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o) Warnings when exiting the emulator, if the |
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settings have not been removed exactly in |
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the same way as they were added? This would |
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improve code cleanliness in the long term. |
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(I.e. require a corresponding _destroy() |
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function for all _new functions... machine_ |
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cpu_ etc.) |
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Help command should have subsections! One for "expressions", |
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mirrored in the documentation, but the internal help should |
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be the one that should be considered correct. |
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o) see src/debugger.c for more |
o) see src/debugger.c for more |
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POWER/PowerPC: |
POWER/PowerPC: |
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x) find and fix the bug which causes NetBSD/macppc to fail after |
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an install! |
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x) NetBSD/prep 3.x triggers a possible bug in the emulator: |
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<wdc_exec_command(0xd005e514,0xd60cdd30,0,8,..)> |
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<ata_get_xfer(0,0xd60cdd30,0,8,..)> |
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<0x26c550(&ata_xfer_pool,2,0,8,..)> |
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<0x35c71c(0x3f27000,0,52,8,..)> |
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<ata_exec_xfer(0xd005e4c8,0x3f27000,0,13,..)> |
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<atastart(0xd005e4c8,0x3f27000,0,13,..)> |
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<__wdccommand_start(0xd005e4c8,0x3f27000,0,13,..)> |
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<bsw1(&prep_isa_io_space_tag,0x800001f6,0,176,..)> |
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[ wdc: write to SDH: 0xb0 (sectorsize 2, lba=1, drive 1, head 0) ] |
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<wdcwait(0xd005e4c8,72,64,0xbb8,..)> |
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<0x198120(0xd005e4c8,72,64,0xbb8,..)> |
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<bsr1(&prep_isa_io_space_tag,0,0,0xbb8,..)> |
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<delay(100,0,0,0xbb8,..)> |
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Note: <bsr1(&prep_isa_io_space_tag,0,0,0xbb8,..)> |
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x) PPC optimizations; instr combs |
x) PPC optimizations; instr combs |
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x) 64-bit stuff: either Linux on G5, or perhaps some hobbyist |
x) 64-bit stuff: either Linux on G5, or perhaps some hobbyist |
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version of AIX? (if there exists such a thing) |
version of AIX? (if there exists such a thing) |
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x) find and fix the bug which causes NetBSD/macppc to fail after |
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an install! |
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x) macppc: adb controller; keyboard (for framebuffer mode) |
x) macppc: adb controller; keyboard (for framebuffer mode) |
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x) make OpenBSD/macppc work (PCI controller stuff) |
x) make OpenBSD/macppc work (PCI controller stuff) |
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x) Floating point exception correctness. |
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x) Alignment exceptions. |
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Algor: |
Algor: |
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PCI interrupts... needed or stuff like the tlp NIC? |
o) Other models than the P5064? |
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o) PCI interrupts... needed for stuff like the tlp NIC? |
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HPCmips: |
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x) Mouse/pad support! :) |
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x) A NIC? (As a PCMCIA device?) |
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AVR: |
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o) Everything. |
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AVR32: |
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o) Everything. It would be good if there was NetBSD/avr32 to |
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experiment with... |
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ARM: |
ARM: |
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o) See netwinder_reset() in NetBSD; the current "an internal error |
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occured" message after reboot/halt is too ugly. |
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o) ARM "wait"-like instruction? |
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o) try to get netbsd/evbarm 3.x running (iq80321) |
o) try to get netbsd/evbarm 3.x running (iq80321) |
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o) make the xscale counter registers (ccnt) work |
o) make the xscale counter registers (ccnt) work |
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o) make the ata controller usable for FreeBSD! |
o) make the ata controller usable for FreeBSD! |
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o) debian/cats crashes because of unimplemented coproc stuff. |
o) debian/cats crashes because of unimplemented coproc stuff. |
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fix this? |
fix this? |
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Test machines: |
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+ dev_fb block fill and copy |
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+ dev_fb draw characters (from the built-in font)? |
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+ dev_fb input device? mouse pointer coordinates and buttons |
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(allow changes in these to cause interrupts as well?) |
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+ Redefine the halt() function so that it stops "sometimes |
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soon", i.e. usage in demo code should be: |
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for (;;) { |
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halt(); |
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} |
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Better CD Image file support: |
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x) Support CD formats that contain more than 1 track, e.g. |
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CDI files (?). These can then contain a mixture of e.g. sound |
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and data tracks, and booting from an ISO filesystem path |
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would boot from [by default] the first data track. |
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(This would make sense for e.g. Dreamcast CD images, or |
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possibly other live-CD formats.) |
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Networking: |
270 |
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x) Fix performance problems caused by only allowing a |
271 |
|
single TCP packet to be unacked. |
272 |
|
x) Don't hardcode offsets into packets! |
273 |
|
x) Test with lower than 100 max tcp/udp connections, |
274 |
|
to make sure that reuse works! |
275 |
|
x) Make OpenBSD work better as a guest OS! |
276 |
|
x) DHCP? Debian doesn't actually send DHCP packets, even |
277 |
|
though it claims to? So it is hard to test. |
278 |
|
x) Multiple networks per emulation, and let different |
279 |
|
NICs in machines connect to different networks. |
280 |
|
x) Support VDE (vde.sf.net)? Easiest/cleanest (before a |
281 |
|
redesign of the network framework has been done) is |
282 |
|
probably to connect it using the current (udp) solution. |
283 |
|
x) Allow SLIP connections, possibly PPP, in addition to |
284 |
|
ethernet? |
285 |
|
|
286 |
Cache simulation: |
Cache simulation: |
287 |
o) Command line flags for: |
o) Command line flags for: |
288 |
o) CPU endianness? |
o) CPU endianness? |
299 |
is another option (easier to implement, but very very slow). |
is another option (easier to implement, but very very slow). |
300 |
|
|
301 |
Documentation: |
Documentation: |
302 |
o) machines, cpus, devices. |
x) Note about sandboxing/security: |
303 |
o) Automagic documentation generation: |
Not all emulated instructions fail in the way they would |
304 |
|
do on real hardware (e.g. a userspace program writing to |
305 |
|
a system register might work in GXemul, but it would |
306 |
|
fail on real hardware). Sandbox = contain from the |
307 |
|
host OS. But the emulated programs will run "less |
308 |
|
securely". |
309 |
|
x) Try NetBSD/arc 4.x! (It seems to work with disk images!) |
310 |
|
x) NetBSD/pmax 4 install instructions: xterm instead of vt100! |
311 |
|
x) DEVICE_TICK in technical.html |
312 |
|
x) Rewrite the section about experimental devices, after the |
313 |
|
framebuffer acceleration has been implemented, and demos |
314 |
|
written. (Symbolic names instead of numbers; example |
315 |
|
use cases, etc. Mention demo files that use the various |
316 |
|
features?) |
317 |
|
x) "a very simple linear framebuffer device (for graphics output)" |
318 |
|
under "which machines does gxemul emulate" ==> better |
319 |
|
description? |
320 |
|
x) Better description on how to set up a cross compiler? |
321 |
|
Example for MIPS64. |
322 |
|
o) Automagic documentation generation? |
323 |
|
x) machines, cpus, devices. |
324 |
x) REMEMBER that several machines/devices can be in |
x) REMEMBER that several machines/devices can be in |
325 |
the same source file! |
the same source file! |
326 |
o) Try to rewrite the install instructions for those machines |
o) Try to rewrite the install instructions for those machines |
327 |
that use 3MAX into using CATS? (To remove the need to a raw |
that use 3MAX into using CATS or hpcmips? (To remove the need |
328 |
ffs partition using up all of the disk image.) |
to use a raw ffs partition, using up all of the disk image.) |
329 |
|
|
330 |
More generic out_of_memory error reporting, and check everywhere! |
More generic out_of_memory error reporting, and check everywhere! |
331 |
Causes: OpenBSD has low default limits for normal users. |
Causes: OpenBSD has low default limits for normal users. |
335 |
Unix systems usually allow processes to allocate virtual |
Unix systems usually allow processes to allocate virtual |
336 |
memory beyond the amount of RAM in the machine.) |
memory beyond the amount of RAM in the machine.) |
337 |
|
|
|
Breakpoints: 32-bit vs 64-bit sign extension for MIPS, warnings, etc. |
|
|
Use the debugger's symbolic name stuff. (which will have to be |
|
|
extended soon to support stuff like "2*x + symbol + y" etc. cool |
|
|
stuff) |
|
|
|
|
338 |
The Device subsystem: |
The Device subsystem: |
339 |
x) allow devices to be moved and/or changed in size (down to a |
x) allow devices to be moved and/or changed in size (down to a |
340 |
minimum size, etc, or up to a max size) |
minimum size, etc, or up to a max size); if there is a collision, |
341 |
|
return false. It is up to the caller to handle this situation! |
342 |
|
x) NOTE: Translations must be invalidated, both for |
343 |
|
registering new devices, and for moving existing ones. |
344 |
|
cpu->invalidate translation caches, for all CPUs that |
345 |
|
are connected to a specific memory. |
346 |
x) keep track of interrupts and busses? actually, allowing any device |
x) keep track of interrupts and busses? actually, allowing any device |
347 |
to be a bus might be a nice idea. |
to be a bus might be a nice idea. |
348 |
x) turn interrupt controllers into devices? :-) |
x) turn interrupt controllers into devices? :-) |
349 |
x) refactor various clocks/nvram/cmos into one device? |
x) refactor various clocks/nvram/cmos into one device? |
350 |
|
|
|
Clocks: |
|
|
x) General framework for automagic clock adjustment for _all_ |
|
|
kinds of clocks and timers. (Which should be possible to turn |
|
|
off, of course, like the way DECstation emulation works now.) |
|
|
|
|
351 |
PCI: |
PCI: |
352 |
x) last write was ffffffff ==> fix this, it should be used |
x) last write was ffffffff ==> fix this, it should be used |
353 |
together with a mask to get the correct bits. also, not ALL |
together with a mask to get the correct bits. also, not ALL |
354 |
bits are size bits! (lowest 4 vs lowest 2?) |
bits are size bits! (lowest 4 vs lowest 2?) |
355 |
x) add support for address fixups |
x) add support for address fixups |
356 |
x) generalize the interrupt routing stuff (lines etc). this should |
x) generalize the interrupt routing stuff (lines etc) |
357 |
be per machine? or per bus, that's better |
|
358 |
x) add a "pcn" NIC (AMD PCnet32 Lance 79c970 (PCI 1022:2000)), |
Clocks and timers: |
359 |
could be useful for several machine modes (Malta, Algor, evbarm, |
x) DON'T HARDCODE 100 HZ IN cpu_mips_coproc.c! |
360 |
hp700?, macppc, etc.) |
x) Test the 8253? Right now it doesn't seem to be used? |
361 |
|
x) NetWinder timeofday is incorrect! |
362 |
Network layer: |
x) Cobalt TOD is incorrect! |
363 |
o) DHCP (for Debian and BSD installers :-) |
x) Go through all other machines, one by one, and fix them. |
|
o) increase performance |
|
|
o) don't rely on NetBSD-ish usage |
|
|
o) Multiple networks per emulation, and let different |
|
|
NICs in machines connect to different networks. |
|
|
o) many other issues: see src/net.c |
|
364 |
|
|
365 |
Busses: |
Busses: |
366 |
o) Redesign the entire "mainbus" concept! |
o) Redesign the entire "mainbus" concept! |
367 |
o) Busses should be placed in a hierarchical tree! |
x) Busses should be placed in a hierarchical tree (?) |
368 |
o) Easily configurable interrupt routing in SMP systems. |
x) Specific clock/bus speeds, cpu speeds etc. |
369 |
o) Specific clock/bus speeds, cpu speeds etc. |
o) Interrupt routing subsystem: |
370 |
|
x) IF POSSIBLE, try to make the new system work with the |
371 |
|
current system, but print annoying warning messages. :) |
372 |
|
Think carefully about this. |
373 |
|
x) Registry for all available interrupts. |
374 |
|
+) Each interrupt controller (including CPU cores |
375 |
|
that can handle interrupts) should register its |
376 |
|
interrupts, e.g. |
377 |
|
cpu[0].irq[3] |
378 |
|
cpu[0].irq[3].pcmcia_slot[1] |
379 |
|
cpu[0].irq.pci[3] |
380 |
|
+) Note: MIPS cpus have multiple irqs in the core, |
381 |
|
while some other CPUs only have one (irq[0] |
382 |
|
or just irq). |
383 |
|
x) Users should use interrupt _names_ instead of integers |
384 |
|
when attaching to an interrupt controller, but when |
385 |
|
asserting/deasserting irq lines, small integers must |
386 |
|
still be used (for obvious performance reasons). |
387 |
|
Figure out a way to do this nicely! |
388 |
|
x) Any users need to say whether they need the interrupt line |
389 |
|
exclusively or allow shared access. |
390 |
|
x) Must work with everything from native IRQs to |
391 |
|
TurboChannel/PCI/ISA/ADB/PCMCIA/... |
392 |
|
x) Must work with SMP emulation! |
393 |
|
x) Make it with device_add(). How does the end user find |
394 |
|
out the name of an interrupt controller/line in e.g. |
395 |
|
a configuration file? |
396 |
o) Synchronization over network? or at least in dyntrans within |
o) Synchronization over network? or at least in dyntrans within |
397 |
one emulated machine |
one emulated machine |
398 |
o) dev->bus: TurboChannel, PCMCIA, ADB? |
o) Convert to real busses: TurboChannel, PCMCIA, ADB |
399 |
|
|
400 |
Config file parser: |
Config file parser: |
401 |
o) Rewrite it from scratch! |
o) Rewrite it from scratch! |
405 |
|
|
406 |
Floating point layer: |
Floating point layer: |
407 |
o) make it common enough to be used by _all_ emulation modes |
o) make it common enough to be used by _all_ emulation modes |
408 |
o) implement more stuff |
o) implement correct error/exception handling and rounding modes |
409 |
|
o) implement more helper functions (i.e. add, sub, mul...) |
410 |
o) non-IEEE modes (i.e. x86)? |
o) non-IEEE modes (i.e. x86)? |
411 |
|
|
412 |
Userland emulation: |
Userland emulation: |
415 |
|
|
416 |
Sound: |
Sound: |
417 |
x) generic sound framework |
x) generic sound framework |
418 |
x) add one or more sound cards as devices |
x) add one or more sound cards as devices; add a testmachine |
419 |
|
sound card first? |
420 |
|
|
421 |
ASC SCSI controller: |
ASC SCSI controller: |
422 |
x) NetBSD/arc 2.0 uses the ASC controller in a way which GXemul |
x) NetBSD/arc 2.0 uses the ASC controller in a way which GXemul |
423 |
cannot yet handle. (NetBSD 1.6.2 works ok.) (Possibly a problem |
cannot yet handle. (NetBSD 1.6.2 works ok.) (Possibly a problem |
424 |
in NetBSD itself, http://mail-index.netbsd.org/source-changes/ |
in NetBSD itself, http://mail-index.netbsd.org/source-changes/ |
425 |
2005/11/06/0024.html suggests that.) |
2005/11/06/0024.html suggests that.) |
426 |
|
NetBSD 4.x seems to work? :) |
427 |
|
|
428 |
Caches / memory hierarchies: (this is mostly MIPS-specific) |
Caches / memory hierarchies: (this is mostly MIPS-specific) |
429 |
o) src/memory*.c: Implement correct cache emulation for |
o) src/memory*.c: Implement correct cache emulation for |
464 |
according to its website.)) |
according to its website.)) |
465 |
|
|
466 |
Better framebuffer and X-windows functionality: |
Better framebuffer and X-windows functionality: |
467 |
|
o) Generalize the update_x1y1x2y2 stuff to an extend-region() |
468 |
|
function... |
469 |
o) -Yx sometimes causes crashes. |
o) -Yx sometimes causes crashes. |
470 |
o) Simple device access to framebuffer_blockcopyfill() etc, |
o) Simple device access to framebuffer_blockcopyfill() etc, |
471 |
and text output (using the built-in fonts), for dev_fb. |
and text output (using the built-in fonts), for dev_fb. |
476 |
o) Non-resizable windows? Or choose scaledown depending |
o) Non-resizable windows? Or choose scaledown depending |
477 |
on size (and center the image, with a black border). |
on size (and center the image, with a black border). |
478 |
o) Different scaledown on different windows? |
o) Different scaledown on different windows? |
479 |
|
o) Non-integral scale-up? (E.g. 640x480 -> 1024x768) |
480 |
o) Switch scaledown during runtime? (Ala CTRL-ALT-plus/minus) |
o) Switch scaledown during runtime? (Ala CTRL-ALT-plus/minus) |
481 |
o) Bug reported by Elijah Rutschman on MacOS with weird |
o) Bug reported by Elijah Rutschman on MacOS with weird |
482 |
keys (F5 = cursor down?). |
keys (F5 = cursor down?). |
490 |
o) Generalize the framebuffer stuff by moving _ALL_ X11 |
o) Generalize the framebuffer stuff by moving _ALL_ X11 |
491 |
specific code to src/x11.c! |
specific code to src/x11.c! |
492 |
|
|
|
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 |
|
|
|
|