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++ trunk/HISTORY (local) $Id: HISTORY,v 1.1632 2007/09/11 21:46:35 debug Exp $ 20070616 Implementing the MIPS32/64 revision 2 "ror" instruction. 20070617 Adding a struct for each physpage which keeps track of which ranges within that page (base offset, length) that are continuously translatable. When running with native code generation enabled (-b), a range is added after each read- ahead loop. Experimenting with using the physical program counter sample data (implemented 20070608) together with the "translatable range" information, to figure out which physical address ranges would be worth translating to native code (if the number of samples falling within a range is above a certain threshold). 20070618 Adding automagic building of .index comment files for src/file/, src/promemul/, src src/useremul/ as well. Adding a "has been translated" bit to the ranges, so that only not-yet-translated ranges will be sampled. 20070619 Moving src/cpu.c and src/memory_rw.c into src/cpus/, src/device.c into src/devices/, and src/machine.c into src/machines/. Creating a skeleton cc/ld native backend module; beginning on the function which will detect cc command line, etc. 20070620 Continuing on the native code generation infrastructure. 20070621 Moving src/x11.c and src/console.c into a new src/console/ subdir (for everything that is console or framebuffer related). Moving src/symbol*.c into a new src/symbol/, which should contain anything that is symbol handling related. 20070624 Making the program counter sampling threshold a "settings variable" (sampling_threshold), i.e. it can now be changed during runtime. Switching the RELEASE notes format from plain text to HTML. If the TMPDIR environment variable is set, it is used instead of "/tmp" for temporary files. Continuing on the cc/ld backend: simple .c code is generated, the compiler and linker are called, etc. Adding detection of host architecture to the configure script (again), and adding icache invalidation support (only implemented for Alpha hosts so far). 20070625 Simplifying the program counter sampling mechanism. 20070626 Removing the cc/ld native code generation stuff, program counter sampling, etc; it would not have worked well in the general case. 20070627 Removing everything related to native code generation. 20070629 Removing the (practically unusable) support for multiple emulations. (The single emulation allowed now still supports multiple simultaneous machines, as before.) Beginning on PCCTWO and M88K interrupts. 20070723 Adding a dummy skeleton for emulation of M32R processors. 20070901 Fixing a warning found by "gcc version 4.3.0 20070817 (experimental)" on amd64. 20070905 Removing some more traces of the old "multiple emulations" code. Also looking in /usr/local/include and /usr/local/lib for X11 libs, when running configure. 20070909 Minor updates to the guest OS install instructions, in preparation for the NetBSD 4.0 release. 20070918 More testing of NetBSD 4.0 RC1.
++ trunk/HISTORY (local) $Id: HISTORY,v 1.1613 2007/06/15 20:11:26 debug Exp $ 20070501 Continuing a little on m88k disassembly (control registers, more instructions). Adding a dummy mvme88k machine mode. 20070502 Re-adding MIPS load/store alignment exceptions. 20070503 Implementing more of the M88K disassembly code. 20070504 Adding disassembly of some more M88K load/store instructions. Implementing some relatively simple M88K instructions (br.n, xor[.u] imm, and[.u] imm). 20070505 Implementing M88K three-register and, or, xor, and jmp[.n], bsr[.n] including function call trace stuff. Applying a patch from Bruce M. Simpson which implements the SYSCON_BOARD_CPU_CLOCK_FREQ_ID object of the syscon call in the yamon PROM emulation. 20070506 Implementing M88K bb0[.n] and bb1[.n], and skeletons for ldcr and stcr (although no control regs are implemented yet). 20070509 Found and fixed the bug which caused Linux for QEMU_MIPS to stop working in 0.4.5.1: It was a faulty change to the MIPS 'sc' and 'scd' instructions I made while going through gcc -W warnings on 20070428. 20070510 Updating the Linux/QEMU_MIPS section in guestoses.html to use mips-test-0.2.tar.gz instead of 0.1. A big thank you to Miod Vallat for sending me M88K manuals. Implementing more M88K instructions (addu, subu, div[u], mulu, ext[u], clr, set, cmp). 20070511 Fixing bugs in the M88K "and" and "and.u" instructions (found by comparing against the manual). Implementing more M88K instructions (mask[.u], mak, bcnd (auto- generated)) and some more control register details. Cleanup: Removing the experimental AVR emulation mode and corresponding devices; AVR emulation wasn't really meaningful. Implementing autogeneration of most M88K loads/stores. The rectangle drawing demo (with -O0) for M88K runs :-) Beginning on M88K exception handling. More M88K instructions: tb0, tb1, rte, sub, jsr[.n]. Adding some skeleton MVME PROM ("BUG") emulation. 20070512 Fixing a bug in the M88K cmp instruction. Adding the M88K lda (scaled register) instruction. Fixing bugs in 64-bit (32-bit pairs) M88K loads/stores. Removing the unused tick_hz stuff from the machine struct. Implementing the M88K xmem instruction. OpenBSD/mvme88k gets far enough to display the Copyright banner :-) Implementing subu.co (guess), addu.co, addu.ci, ff0, and ff1. Adding a dev_mvme187, for MVME187-specific devices/registers. OpenBSD/mvme88k prints more boot messages. :) 20070515 Continuing on MVME187 emulation (adding more devices, beginning on the CMMUs, etc). Adding the M88K and.c, xor.c, and or.c instructions, and making sure that mul, div, etc cause exceptions if executed when SFD1 is disabled. 20070517 Continuing on M88K and MVME187 emulation in general; moving the CMMU registers to the CPU struct, separating dev_pcc2 from dev_mvme187, and beginning on memory_m88k.c (BATC and PATC). Fixing a bug in 64-bit (32-bit pairs) M88K fast stores. Implementing the clock part of dev_mk48txx. Implementing the M88K fstcr and xcr instructions. Implementing m88k_cpu_tlbdump(). Beginning on the implementation of a separate address space for M88K .usr loads/stores. 20070520 Removing the non-working (skeleton) Sandpoint, SonyNEWS, SHARK Dnard, and Zaurus machine modes. Experimenting with dyntrans to_be_translated read-ahead. It seems to give a very small performance increase for MIPS emulation, but a large performance degradation for SuperH. Hm. 20070522 Disabling correct SuperH ITLB emulation; it does not seem to be necessary in order to let SH4 guest OSes run, and it slows down userspace code. Implementing "samepage" branches for SuperH emulation, and some other minor speed hacks. 20070525 Continuing on M88K memory-related stuff: exceptions, memory transaction register contents, etc. Implementing the M88K subu.ci instruction. Removing the non-working (skeleton) Iyonix machine mode. OpenBSD/mvme88k reaches userland :-), starts executing /sbin/init's instructions, and issues a few syscalls, before crashing. 20070526 Fixing bugs in dev_mk48txx, so that OpenBSD/mvme88k detects the correct time-of-day. Implementing a generic IRQ controller for the test machines (dev_irqc), similar to a proposed patch from Petr Stepan. Experimenting some more with translation read-ahead. Adding an "expect" script for automated OpenBSD/landisk install regression/performance tests. 20070527 Adding a dummy mmEye (SH3) machine mode skeleton. FINALLY found the strange M88K bug I have been hunting: I had not emulated the SNIP value for exceptions occurring in branch delay slots correctly. Implementing correct exceptions for 64-bit M88K loads/stores. Address to symbol lookups are now disabled when M88K is running in usermode (because usermode addresses don't have anything to do with supervisor addresses). 20070531 Removing the mmEye machine mode skeleton. 20070604 Some minor code cleanup. 20070605 Moving src/useremul.c into a subdir (src/useremul/), and cleaning up some more legacy constructs. Adding -Wstrict-aliasing and -fstrict-aliasing detection to the configure script. 20070606 Adding a check for broken GCC on Solaris to the configure script. (GCC 3.4.3 on Solaris cannot handle static variables which are initialized to 0 or NULL. :-/) Removing the old (non-working) ARC emulation modes: NEC RD94, R94, R96, and R98, and the last traces of Olivetti M700 and Deskstation Tyne. Removing the non-working skeleton WDSC device (dev_wdsc). 20070607 Thinking about how to use the host's cc + ld at runtime to generate native code. (See experiments/native_cc_ld_test.i for an example.) 20070608 Adding a program counter sampling timer, which could be useful for native code generation experiments. The KN02_CSR_NRMMOD bit in the DECstation 5000/200 (KN02) CSR should always be set, to allow a 5000/200 PROM to boot. 20070609 Moving out breakpoint details from the machine struct into a helper struct, and removing the limit on max nr of breakpoints. 20070610 Moving out tick functions into a helper struct as well (which also gets rid of the max limit). 20070612 FINALLY figured out why Debian/DECstation stopped working when translation read-ahead was enabled: in src/memory_rw.c, the call to invalidate_code_translation was made also if the memory access was an instruction load (if the page was mapped as writable); it shouldn't be called in that case. 20070613 Implementing some more MIPS32/64 revision 2 instructions: di, ei, ext, dext, dextm, dextu, and ins. 20070614 Implementing an instruction combination for the NetBSD/arm idle loop (making the host not use any cpu if NetBSD/arm inside the emulator is not using any cpu). Increasing the nr of ARM VPH entries from 128 to 384. 20070615 Removing the ENABLE_arch stuff from the configure script, so that all included architectures are included in both release and development builds. Moving memory related helper functions from misc.c to memory.c. Adding preliminary instructions for netbooting NetBSD/pmppc to guestoses.html; it doesn't work yet, there are weird timeouts. Beginning a total rewrite of the userland emulation modes (removing all emulation modes, beginning from scratch with NetBSD/MIPS and FreeBSD/Alpha only). 20070616 After fixing a bug in the DEC21143 NIC (the TDSTAT_OWN bit was only cleared for the last segment when transmitting, not all segments), NetBSD/pmppc boots with root-on-nfs without the timeouts. Updating guestoses.html. Removing the skeleton PSP (Playstation Portable) mode. Moving X11-related stuff in the machine struct into a helper struct. Cleanup of out-of-memory checks, to use a new CHECK_ALLOCATION macro (which prints a meaningful error message). Adding a COMMENT to each machine and device (for automagic .index comment generation). Doing regression testing for the next release. ============== RELEASE 0.4.6 ==============
++ trunk/HISTORY (local) $Id: HISTORY,v 1.1515 2007/04/14 05:39:46 debug Exp $ 20070324 Adding a "--debug" option to the configure script, to disable optimizations in unstable development builds. Moving out SCSI-specific stuff from diskimage.c into a new diskimage_scsicmd.c. Applying Hĺvard Eidnes' patch for SCSICDROM_READ_DISKINFO and SCSICDROM_READ_TRACKINFO. (Not really tested yet.) Implementing disk image "overlays" (to allow simple roll-back to previous disk state). Adding a 'V' disk flag for this, and updating the man page and misc.html. 20070325 Stability fix to cpu_dyntrans.c, when multiple physical pages share the same initial table entry. (The ppp == NULL check should be physpage_ofs == 0.) Bug found by analysing GXemul against a version patched for Godson. Fixing a second occurance of the same problem (also in cpu_dyntrans.c). Fixing a MAJOR physical page leak in cpu_dyntrans.c; pages weren't _added_ to the set of translated pages, they _replaced_ all previous pages. It's amazing that this bug has been able to live for this long. (Triggered when emulating >128MB RAM.) 20070326 Removing the GDB debugging stub support; it was too hackish and ugly. 20070328 Moving around some native code generation skeleton code. 20070329 The -lm check in the configure script now also checks for sin() in addition to sqrt(). (Thanks to Nigel Horne for noticing that sqrt was not enough on Fedora Core 6.) (Not verified yet.) 20070330 Fixing an indexing bug in dev_sh4.c, found by using gcc version 4.3.0 20070323. 20070331 Some more experimentation with native code generation. 20070404 Attempting to fix some more SH4 SCIF interrupt bugs; rewriting the SH interrupt assertion/deassertion code somewhat. 20070410 Splitting src/file.c into separate files in src/file/. Cleanup: Removing the dummy TS7200, Walnut, PB1000, and Meshcube emulation modes, and dev_epcom and dev_au1x00. Removing the experimental CHIP8/RCA180x code; it wasn't really working much lately, anyway. It was fun while it lasted. Also removing the experimental Transputer CPU support. 20070412 Moving the section about how the dynamic translation system works from intro.html to a separate translation.html file. Minor SH fixes; attempting to get OpenBSD/landisk to run without randomly bugging out, but no success yet. 20070413 SH SCI (serial bit interface) should now work together with a (new) RS5C313 clock device (for Landisk emulation). 20070414 Moving Redhat/MIPS down from supported to experimental, in guestoses.html. Preparing for a new release; doing some regression testing etc. ============== RELEASE 0.4.5 ==============
++ trunk/HISTORY (local) $Id: HISTORY,v 1.1497 2007/03/18 03:41:36 debug Exp $ 20070224 Minor update to the initialization of the ns16550 in machine_walnut.c, to allow that machine type to boot with the new interrupt system (although it is still a dummy machine). Adding a wdc at 0x14000000 to machine_landisk.c, and fixing the SCIF serial interrupts of the SH4 cpu enough to get NetBSD/landisk booting from a disk image :-) Adding a preliminary install instruction skeleton to guestoses.html. 20070306 Adding SH-IPL+G PROM emulation, and also passing the "end" symbol in r5 on bootup, for Landisk emulation. This is enough to get OpenBSD/landisk to install :) Adding a preliminary install instruction skeleton to the documentation. SuperH emulation is still shaky, though :-/ 20070307 Fixed a strangeness in memory_sh.c (read/write was never returned for any page). (Unknown whether this fixes any actual problems, though.) 20070308 dev_ram.c fix: invalidate code translations on writes to RAM, emulated as separate devices. Linux/dreamcast gets further in the boot process than before, but still bugs out in userland. Fixing bugs in the "stc.l gbr,@-rN" and "ldc.l @rN+,gbr" SuperH instructions (they should NOT check the MD bit), allowing the Linux/dreamcast Live CD to reach userland correctly :-) 20070310 Changing the cpu name "Alpha" in src/useremul.c to "21364" to unbreak userland syscall emulation of FreeBSD/Alpha binaries. 20070314 Applying a patch from Michael Yaroslavtsev which fixes the previous Linux lib64 patch to the configure script. 20070315 Adding a (dummy) sun4v machine type, and SPARC T1 cpu type. 20070316 Creating a new directory, src/disk, and moving diskimage.c to it. Separating out bootblock loading stuff from emul.c into new files in src/disk. Adding some more SPARC registers. 20070318 Preparing/testing for a minirelease, 0.4.4.1. ============== RELEASE 0.4.4.1 ==============
++ trunk/HISTORY (local) $Id: HISTORY,v 1.1480 2007/02/19 01:34:42 debug Exp $ 20061029 Changing usleep(1) calls in the debugger to usleep(10000) 20061107 Adding a new disk image option (-d o...) which sets the ISO9660 filesystem base offset; also making some other hacks to allow NetBSD/dreamcast and homebrew demos/games to boot directly from a filesystem image. Moving Dreamcast-specific stuff in the documentation to its own page (dreamcast.html). Adding a border to the Dreamcast PVR framebuffer. 20061108 Adding a -T command line option (again?), for halting the emulator on unimplemented memory accesses. 20061109 Continuing on various SH4 and Dreamcast related things. The emulator should now halt on more unimplemented device accesses, instead of just printing a warning, forcing me to actually implement missing stuff :) 20061111 Continuing on SH4 and Dreamcast stuff. Adding a bogus Landisk (SH4) machine mode. 20061112 Implementing some parts of the Dreamcast GDROM device. With some ugly hacks, NetBSD can (barely) mount an ISO image. 20061113 NetBSD/dreamcast now starts booting from the Live CD image, but crashes randomly quite early on in the boot process. 20061122 Beginning on a skeleton interrupt.h and interrupt.c for the new interrupt subsystem. 20061124 Continuing on the new interrupt system; taking the first steps to attempt to connect CPUs (SuperH and MIPS) and devices (dev_cons and SH4 timer interrupts) to it. Many things will probably break from now on. 20061125 Converting dev_ns16550, dev_8253 to the new interrupt system. Attempting to begin to convert the ISA bus. 20061130 Incorporating a patch from Brian Foley for the configure script, which checks for X11 libs in /usr/X11R6/lib64 (which is used on some Linux systems). 20061227 Adding a note in the man page about booting from Dreamcast CDROM images (i.e. that no external kernel is needed). 20061229 Continuing on the interrupt system rewrite: beginning to convert more devices, adding abort() calls for legacy interrupt system calls so that everything now _has_ to be rewritten! Almost all machine modes are now completely broken. 20061230 More progress on removing old interrupt code, mostly related to the ISA bus + devices, the LCA bus (on AlphaBook1), and the Footbridge bus (for CATS). And some minor PCI stuff. Connecting the ARM cpu to the new interrupt system. The CATS, NetWinder, and QEMU_MIPS machine modes now work with the new interrupt system :) 20061231 Connecting PowerPC CPUs to the new interrupt system. Making PReP machines (IBM 6050) work again. Beginning to convert the GT PCI controller (for e.g. Malta and Cobalt emulation). Some things work, but not everything. Updating Copyright notices for 2007. 20070101 Converting dev_kn02 from legacy style to devinit; the 3max machine mode now works with the new interrupt system :-] 20070105 Beginning to convert the SGI O2 machine to the new interrupt system; finally converting O2 (IP32) devices to devinit, etc. 20070106 Continuing on the interrupt system redesign/rewrite; KN01 (PMAX), KN230, and Dreamcast ASIC interrupts should work again, moving out stuff from machine.h and devices.h into the corresponding devices, beginning the rewrite of i80321 interrupts, etc. 20070107 Beginning on the rewrite of Eagle interrupt stuff (PReP, etc). 20070117 Beginning the rewrite of Algor (V3) interrupts (finally changing dev_v3 into devinit style). 20070118 Removing the "bus" registry concept from machine.h, because it was practically meaningless. Continuing on the rewrite of Algor V3 ISA interrupts. 20070121 More work on Algor interrupts; they are now working again, well enough to run NetBSD/algor. :-) 20070122 Converting VR41xx (HPCmips) interrupts. NetBSD/hpcmips can be installed using the new interrupt system :-) 20070123 Making the testmips mode work with the new interrupt system. 20070127 Beginning to convert DEC5800 devices to devinit, and to the new interrupt system. Converting Playstation 2 devices to devinit, and converting the interrupt system. Also fixing a severe bug: the interrupt mask register on Playstation 2 is bitwise _toggled_ on writes. 20070128 Removing the dummy NetGear machine mode and the 8250 device (which was only used by the NetGear machine). Beginning to convert the MacPPC GC (Grand Central) interrupt controller to the new interrupt system. Converting Jazz interrupts (PICA61 etc.) to the new interrupt system. NetBSD/arc can be installed again :-) Fixing the JAZZ timer (hardcoding it at 100 Hz, works with NetBSD and it is better than a completely dummy timer as it was before). Converting dev_mp to the new interrupt system, although I haven't had time to actually test it yet. Completely removing src/machines/interrupts.c, cpu_interrupt and cpu_interrupt_ack in src/cpu.c, and src/include/machine_interrupts.h! Adding fatal error messages + abort() in the few places that are left to fix. Converting dev_z8530 to the new interrupt system. FINALLY removing the md_int struct completely from the machine struct. SH4 fixes (adding a PADDR invalidation in the ITLB replacement code in memory_sh.c); the NetBSD/dreamcast LiveCD now runs all the way to the login prompt, and can be interacted with :-) Converting the CPC700 controller (PCI and interrupt controller for PM/PPC) to the new interrupt system. 20070129 Fixing MACE ISA interrupts (SGI IP32 emulation). Both NetBSD/ sgimips' and OpenBSD/sgi's ramdisk kernels can now be interacted with again. 20070130 Moving out the MIPS multi_lw and _sw instruction combinations so that they are auto-generated at compile time instead. 20070131 Adding detection of amd64/x86_64 hosts in the configure script, for doing initial experiments (again :-) with native code generation. Adding a -k command line option to set the size of the dyntrans cache, and a -B command line option to disable native code generation, even if GXemul was compiled with support for native code generation for the specific host CPU architecture. 20070201 Experimenting with a skeleton for native code generation. Changing the default behaviour, so that native code generation is now disabled by default, and has to be enabled by using -b on the command line. 20070202 Continuing the native code generation experiments. Making PCI interrupts work for Footbridge again. 20070203 More native code generation experiments. Removing most of the native code generation experimental code, it does not make sense to include any quick hacks like this. Minor cleanup/removal of some more legacy MIPS interrupt code. 20070204 Making i80321 interrupts work again (for NetBSD/evbarm etc.), and fixing the timer at 100 Hz. 20070206 Experimenting with removing the wdc interrupt slowness hack. 20070207 Lowering the number of dyntrans TLB entries for MIPS from 192 to 128, resulting in a minor speed improvement. Minor optimization to the code invalidation routine in cpu_dyntrans.c. 20070208 Increasing (experimentally) the nr of dyntrans instructions per loop from 60 to 120. 20070210 Commenting out (experimentally) the dyntrans_device_danger detection in memory_rw.c. Changing the testmips and baremips machines to use a revision 2 MIPS64 CPU by default, instead of revision 1. Removing the dummy i960, IA64, x86, AVR32, and HP PA-RISC files, the PC bios emulation, and the Olivetti M700 (ARC) and db64360 emulation modes. 20070211 Adding an "mp" demo to the demos directory, which tests the SMP functionality of the testmips machine. Fixing PReP interrupts some more. NetBSD/prep now boots again. 20070216 Adding a "nop workaround" for booting Mach/PMAX to the documentation; thanks to Artur Bujdoso for the values. Converting more of the MacPPC interrupt stuff to the new system. Beginning to convert BeBox interrupts to the new system. PPC603e should NOT have the PPC_NO_DEC flag! Removing it. Correcting BeBox clock speed (it was set to 100 in the NetBSD bootinfo block, but should be 33000000/4), allowing NetBSD to start without using the (incorrect) PPC_NO_DEC hack. 20070217 Implementing (slow) AltiVec vector loads and stores, allowing NetBSD/macppc to finally boot using the GENERIC kernel :-) Updating the documentation with install instructions for NetBSD/macppc. 20070218-19 Regression testing for the release. ============== RELEASE 0.4.4 ==============
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