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2016-09-02APIC IDs may not be consecutive and start from zero, so we cannot really use itFrans Kaashoek1-6/+4
as a direct index into cpus. Record apicid in struct cpu and have cpunum() look for it. Replace cpu->id with cpunum() everywhere, and replace cpu->id with cpu->apicid. Thanks to Xi Wang.
2016-08-24p2v -> P2VRobert Morris1-2/+2
2016-08-18Removed useless variable.Peter H. Froehlich1-4/+0
2016-08-18Removed useless function and prototypes.Peter H. Froehlich1-7/+1
2011-08-15Avoid "boot" in xv6Frans Kaashoek1-1/+1
2011-08-09Use kernel virtual addresses for BIOS memory, etc.Frans Kaashoek1-8/+8
2011-07-29Map kernel highFrans Kaashoek1-1/+3
Very important to give qemu memory through PHYSTOP :(
2011-02-19xv6: formatting, cleanup, rev5 (take 2)Russ Cox1-2/+0
2011-01-11mp: do not panic on surprising hwRuss Cox1-3/+12
2011-01-11make new code like old codeRuss Cox1-2/+2
Variable declarations at top of function, separate from initialization. Use == 0 instead of ! for checking pointers. Consistent spacing around {, *, casts. Declare 0-parameter functions as (void) not (). Integer valued functions return -1 on failure, 0 on success.
2010-07-02Initial version of single-cpu xv6 with page tablesFrans Kaashoek1-0/+1
2009-08-30assorted fixes:Russ Cox1-5/+6
* rename c/cp to cpu/proc * rename cpu.context to cpu.scheduler * fix some comments * formatting for printout
2009-03-08be consistent: no underscores in function namesrsc1-14/+14
2007-11-28bda[0xE] is a 16-bit segment number,rsc1-1/+1
not a real address. So shift 4. Reported by Silas. Jim McKie says this code only matters on ancient EISA MP systems.
2007-08-28comments; rename irq_ to pic_rsc1-0/+2
2007-08-28spaces around else for rtmrsc1-1/+1
2007-08-28more consistent spacingrsc1-1/+1
2007-08-27delete unnecessary #include linesrsc1-2/+1
2007-08-27Simplify MP hardware code.rsc1-144/+60
Mainly delete unused constants and code. Move mp_startthem to main.c as bootothers.
2007-08-27nitsrsc1-6/+6
2007-08-27nitsrsc1-17/+13
2007-08-24nitrsc1-1/+1
2006-09-08nitrsc1-1/+1
2006-09-08formatting nitsrsc1-1/+2
2006-09-08use bootstrap processor as specified by MP table. typically 0, but notkaashoek1-1/+2
guaranteed.
2006-09-07comment fixesrsc1-1/+2
2006-09-07run without lapic and ioapic, if they are not presentkaashoek1-2/+6
if no lapic available, use 8253pit for clock now xv6 runs both on qemu (uniprocessor) and bochs (uniprocessor and MP)
2006-09-06wrap long linesrsc1-7/+17
2006-09-06break single-line if statementsrsc1-1/+2
2006-09-06no /* */ commentsrsc1-24/+20
2006-09-06standardize various * conventionsrsc1-19/+19
2006-09-06spacing fixes: no tabs, 2-space indents (for rtm)rsc1-29/+29
2006-08-29prune unneeded panics and debug outputrtm1-11/+0
2006-08-08fix race in holding() check in acquire()rtm1-1/+3
give cpu1 a TSS and gdt for when it enters scheduler() and a pseudo proc[] entry for each cpu cpu0 waits for each other cpu to start up read() for files
2006-08-04better interrupt plan---this one appears to workkaashoek1-8/+23
ioapic
2006-07-20uint32_t -> uint &crtm1-19/+19
2006-07-17standarize on unix-like lowercase struct namesrsc1-20/+20
2006-07-17add uint and standardize on typedefs instead of unsignedrsc1-2/+2
2006-07-17nitpicksrsc1-2/+2
2006-07-16various little fixes that should have been in earlier checkinsrsc1-1/+0
2006-07-16Keep interrupts disabled during startup.rsc1-1/+3
2006-07-12extract lapic code from mp.ckaashoek1-202/+7
2006-07-12i think my cmpxchg use was wrong in acquirertm1-3/+8
nesting cli/sti: release shouldn't always enable interrupts separate setup of lapic from starting of other cpus, so cpu() works earlier flag to disable locking in console output make locks work even when curproc==0 (still crashes in clock interrupt)
2006-07-12no more big kernel lockrtm1-4/+0
succeeds at usertests.c pipe test
2006-07-11Changes to allow use of native x86 ELF compilers, which on myrsc1-2/+2
Linux 2.4 box using gcc 3.4.6 don't seem to follow the same conventions as the i386-jos-elf-gcc compilers. Can run make 'TOOLPREFIX=' or edit the Makefile. curproc[cpu()] can now be NULL, indicating that no proc is running. This seemed safer to me than having curproc[0] and curproc[1] both pointing at proc[0] potentially. The old implementation of swtch depended on the stack frame layout used inside swtch being okay to return from on the other stack (exactly the V6 you are not expected to understand this). It also could be called in two contexts: at boot time, to schedule the very first process, and later, on behalf of a process, to sleep or schedule some other process. I split this into two functions: scheduler and swtch. The scheduler is now a separate never-returning function, invoked by each cpu once set up. The scheduler looks like: scheduler() { setjmp(cpu.context); pick proc to schedule blah blah blah longjmp(proc.context) } The new swtch is intended to be called only when curproc[cpu()] is not NULL, that is, only on behalf of a user proc. It does: swtch() { if(setjmp(proc.context) == 0) longjmp(cpu.context) } to save the current proc context and then jump over to the scheduler, running on the cpu stack. Similarly the system call stubs are now in assembly in usys.S to avoid needing to know the details of stack frame layout used by the compiler. Also various changes in the debugging prints.
2006-07-05timer interruptskaashoek1-19/+42
disk interrupts (assuming bochs has a bug)
2006-07-01swtch saves callee-saved registersrtm1-8/+4
swtch idles on per-CPU stack, not on calling process's stack fix pipe bugs usertest.c tests pipes, fork, exit, close
2006-06-28disable interrupts when holding kernel lockkaashoek1-0/+6
2006-06-28timer interruptskaashoek1-13/+25
2006-06-26stick mpstack in cpu structurekaashoek1-8/+6