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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 1.1497 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 ==============
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