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* - There's no need to overwrite the default device method with the defaultmarius2011-11-221-2/+1
| | | | | | | | | | one. Interestingly, these are actually the default for quite some time (bus_generic_driver_added(9) since r52045 and bus_generic_print_child(9) since r52045) but even recently added device drivers do this unnecessarily. Discussed with: jhb, marcel - While at it, use DEVMETHOD_END. Discussed with: jhb - Also while at it, use __FBSDID.
* Move VT switching hack for suspend/resume from bus drivers to syscons.cjkim2011-05-091-127/+0
| | | | | | using event handlers. A different version was Submitted by: Taku YAMAMOTO (taku at tackymt dot homeip dot net)
* Retire isa_setup_intr() and isa_teardown_intr() and use the generic busjhb2011-05-062-8/+2
| | | | | | versions instead. They were never needed as bus_generic_intr() and bus_teardown_intr() had been changed to pass the original child device up in 42734, but the ISA bus was not converted to new-bus until 45720.
* - Enable an extra debugging bootverbose printf when probing ISA PNP cardsjhb2011-03-291-2/+2
| | | | | | | | | listing each card as it is found on non-PC98 (PC98 already had this). - Increase the length of the DELAY() used before timing out while reading PNP resource data. Tested by: Steven Nikkel steven_nikkel ertyu org MFC after: 1 week
* bus_add_child: change type of order parameter to u_intavg2010-09-101-1/+1
| | | | | | | | | | This reflects actual type used to store and compare child device orders. Change is mostly done via a Coccinelle (soon to be devel/coccinelle) semantic patch. Verified by LINT+modules kernel builds. Followup to: r212213 MFC after: 10 days
* When we are not switching VTs, just mark all buffer to be updated.jkim2010-07-151-1/+7
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* Implement new event timers infrastructure. It provides unified APIs formav2010-06-201-4/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | writing event timer drivers, for choosing best possible drivers by machine independent code and for operating them to supply kernel with hardclock(), statclock() and profclock() events in unified fashion on various hardware. Infrastructure provides support for both per-CPU (independent for every CPU core) and global timers in periodic and one-shot modes. MI management code at this moment uses only periodic mode, but one-shot mode use planned for later, as part of tickless kernel project. For this moment infrastructure used on i386 and amd64 architectures. Other archs are welcome to follow, while their current operation should not be affected. This patch updates existing drivers (i8254, RTC and LAPIC) for the new order, and adds event timers support into the HPET driver. These drivers have different capabilities: LAPIC - per-CPU timer, supports periodic and one-shot operation, may freeze in C3 state, calibrated on first use, so may be not exactly precise. HPET - depending on hardware can work as per-CPU or global, supports periodic and one-shot operation, usually provides several event timers. i8254 - global, limited to periodic mode, because same hardware used also as time counter. RTC - global, supports only periodic mode, set of frequencies in Hz limited by powers of 2. Depending on hardware capabilities, drivers preferred in following orders, either LAPIC, HPETs, i8254, RTC or HPETs, LAPIC, i8254, RTC. User may explicitly specify wanted timers via loader tunables or sysctls: kern.eventtimer.timer1 and kern.eventtimer.timer2. If requested driver is unavailable or unoperational, system will try to replace it. If no more timers available or "NONE" specified for second, system will operate using only one timer, multiplying it's frequency by few times and uing respective dividers to honor hz, stathz and profhz values, set during initial setup.
* Do not attempt to switch to the same VTs between suspend and resume.jkim2010-05-261-9/+11
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* Let the first device suspend and the last device resume syscons(4).jkim2010-05-261-10/+5
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* Fix more style(9) nits that I missed in the previous commit.jkim2010-05-221-5/+4
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* Fix style(9) nits.jkim2010-05-221-36/+39
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* Suspend screen updates when the video controller is powered down.jkim2010-05-221-15/+86
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* Introduce the new kernel sub-tree x86 which should contain all the codeattilio2010-02-252-516/+0
| | | | | | | | | | | | | | shared and generalized between our current amd64, i386 and pc98. This is just an initial step that should lead to a more complete effort. For the moment, a very simple porting of cpufreq modules, BIOS calls and the whole MD specific ISA bus part is added to the sub-tree but ideally a lot of code might be added and more shared support should grow. Sponsored by: Sandvine Incorporated Reviewed by: emaste, kib, jhb, imp Discussed on: arch MFC: 3 weeks
* Remove extraneous semicolons, no functional changes.mbr2010-01-071-1/+1
| | | | | Submitted by: Marc Balmer <marc@msys.ch> MFC after: 1 week
* Update d_mmap() to accept vm_ooffset_t and vm_memattr_t.rnoland2009-12-291-2/+4
| | | | | | | | | | | | | This replaces d_mmap() with the d_mmap2() implementation and also changes the type of offset to vm_ooffset_t. Purge d_mmap2(). All driver modules will need to be rebuilt since D_VERSION is also bumped. Reviewed by: jhb@ MFC after: Not in this lifetime...
* Attach dpms(4) to vgapm and make sure to restore DPMS state afterjkim2009-12-151-0/+3
| | | | | | VGA is resumed properly. Reviewed by: jhb
* - Partially revert hackish r198964 and r199002.jkim2009-11-121-92/+145
| | | | | | | - Add a proxy driver vgapm to help vgapci to save/load VGA state. - Move device_set_desc() to the right place while we are here. Reviewed by: jhb
* Remove duplicate suspend/resume code from vga_pci.c and let vga(4) registerjkim2009-11-061-19/+53
| | | | | | itself to an associated PCI device if it exists. It is little bit hackish but it should fix build without frame buffer driver since r198964. Fix some style(9) nits in vga_isa.c while we are here.
* Save/restore VGA state from vga_pci.c instead of relying on vga_isa.c.jkim2009-11-051-19/+18
| | | | | It was not working because we were saving its state after the device was powered down. Simplify vesa_load_state() as the culprit is fixed now.
* Save/restore VGA color palette while suspending and resuming.jkim2009-11-041-10/+32
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* Tweak the way that the ACPI and ISA bus drivers match hint devices tojhb2009-08-241-4/+23
| | | | | | | | | | | | | | | BIOS-enumerated devices: - Assume a device is a match if the memory and I/O ports match even if the IRQ or DRQ is wrong or missing. Some BIOSes don't include an IRQ for the atrtc device for example. - Add a hack to better match floppy controller devices. Many BIOSes do not include the starting port of the floppy controller listed in the hints (0x3f0) in the resources for the device. So far, however, all the BIOS variations encountered do include the 'port + 2' resource (0x3f2), so adjust the matching for "fdc" devices to look for 'port + 2'. Reviewed by: imp MFC after: 3 days
* Rename statclock_disable variable to atrtcclock_disable that it actually is,mav2009-05-032-0/+28
| | | | | | | | | | | | | and hide it inside of atrtc driver. Add new tunable hint.atrtc.0.clock controlling it. Setting it to 0 disables using RTC clock as stat-/ profclock sources. Teach i386 and amd64 SMP platforms to emulate stat-/profclocks using i8254 hardclock, when LAPIC and RTC clocks are disabled. This allows to reduce global interrupt rate of idle system down to about 100 interrupts per core, permitting C3 and deeper C-states provide maximum CPU power efficiency.
* Add resume methods to i8254 and atrtc devices.mav2009-05-011-2/+8
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* Allow syscons to work on amd64 and i386 without any hints:jhb2009-03-051-3/+7
| | | | | | | | - Enable keyboard autodetection by default for ISA syscons attachments. - If there are no syscons hints at all, assume there is a single sc0 device anyway. The console probe will still fail unless a VGA adapter is found. MFC after: 2 weeks
* Allow device hints to wire the unit numbers of devices.jhb2008-11-184-103/+149
| | | | | | | | | | | | | | | | | | | | - An "at" hint now reserves a device name. - A new BUS_HINT_DEVICE_UNIT method is added to the bus interface. When determining the unit number of a device, this method is invoked to let the bus driver specify the unit of a device given a specific devclass. This is the only way a device can be given a name reserved via an "at" hint. - Implement BUS_HINT_DEVICE_UNIT() for the acpi(4) and isa(4) bus drivers. Both of these busses implement this by comparing the resources for a given hint device with the resources enumerated by ACPI/PnPBIOS and wire a unit if the hint resources are a subset of the "real" resources. - Use bus_hinted_children() for adding hinted devices on isa(4) busses now instead of doing it by hand. - Remove the unit kludging from sio(4) as it is no longer necessary. Prodding from: peter, imp OK'd by: marcel MFC after: 1 month
* MFp4:imp2008-11-024-5/+32
| | | | | | Make the ISA bus keep track of more PNP details. Plus a minor style fix while I'm here. More could be done here, but except for some SBCs that don't have ACPI, there's limited value to anybody in doing so.
* MFp4 (my newcard tree):imp2008-08-242-55/+0
| | | | | ISACFGATTR_MULTI is unused. Retire it, and a function that has no side effects used to compute it.
* atrtc.c is a repocopy of the RTC device driver from i386/isa/clock.cphk2008-04-142-599/+40
| | | | | In addition to the device driver functionality, it exposes a number of functions which various other bits of code use to fondle the RTC chip.
* Move i386 to generic RTC handling code.phk2008-04-121-103/+168
| | | | | | | | | | | | | | | | | | | | | | | | Make clock_if.m and subr_rtc.c standard on i386 Add hints for "atrtc" driver, for non-PnP, non-ACPI systems. NB: Make sure to install GENERIC.hints into /boot/device.hints in these! Nuke MD inittodr(), resettodr() functions. Don't attach to PHP0B00 in the "attimer" dummy driver any more, and remove comments that no longer apply for that reason. Add new "atrtc" device driver, which handles IBM PC AT Real Time Clock compatible devices using subr_rtc and clock_if. This driver is not entirely clean: other code still fondles the hardware to get a statclock interrupt on non-ACPI timer systems. Wrap some overly long lines. After it has settled in -current, this will be ported to amd64. Technically this is MFC'able, but I fail to see a good reason.
* Back in the good old days, PC's had random pieces of rock forphk2008-03-261-122/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | frequency generation and what frequency the generated was anyones guess. In general the 32.768kHz RTC clock x-tal was the best, because that was a regular wrist-watch Xtal, whereas the X-tal generating the ISA bus frequency was much lower quality, often costing as much as several cents a piece, so it made good sense to check the ISA bus frequency against the RTC clock. The other relevant property of those machines, is that they typically had no more than 16MB RAM. These days, CPU chips croak if their clocks are not tightly within specs and all necessary frequencies are derived from the master crystal by means if PLL's. Considering that it takes on average 1.5 second to calibrate the frequency of the i8254 counter, that more likely than not, we will not actually use the result of the calibration, and as the final clincher, we seldom use the i8254 for anything besides BEL in syscons anyway, it has become time to drop the calibration code. If you need to tell the system what frequency your i8254 runs, you can do so from the loader using hw.i8254.freq or using the sysctl kern.timecounter.tc.i8254.frequency.
* Further cleanup of sound generation in syscons:phk2008-03-261-9/+1
| | | | | | | | The timer_spkr_*() functions take care of the enabling/disabling of the speaker. Test on the existence of timer_spkr_*() functions, rather than architectures.
* The "free-lance" timer in the i8254 is only used for the speakerphk2008-03-262-37/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | these days, so de-generalize the acquire_timer/release_timer api to just deal with speakers. The new (optional) MD functions are: timer_spkr_acquire() timer_spkr_release() and timer_spkr_setfreq() the last of which configures the timer to generate a tone of a given frequency, in Hz instead of 1/1193182th of seconds. Drop entirely timer2 on pc98, it is not used anywhere at all. Move sysbeep() to kern/tty_cons.c and use the timer_spkr*() if they exist, and do nothing otherwise. Remove prototypes and empty acquire-/release-timer() and sysbeep() functions from the non-beeping archs. This eliminate the need for the speaker driver to know about i8254frequency at all. In theory this makes the speaker driver MI, contingent on the timer_spkr_*() functions existing but the driver does not know this yet and still attaches to the ISA bus. Syscons is more tricky, in one function, sc_tone(), it knows the hz and things are just fine. In the other function, sc_bell() it seems to get the period from the KDMKTONE ioctl in terms if 1/1193182th second, so we hardcode the 1193182 and leave it at that. It's probably not important. Change a few other sysbeep() uses which obviously knew that the argument was in terms of i8254 frequency, and leave alone those that look like people thought sysbeep() took frequency in hertz. This eliminates the knowledge of i8254_freq from all but the actual clock.c code and the prof_machdep.c on amd64 and i386, where I think it would be smart to ask for help from the timecounters anyway [TBD].
* Rename timer0_max_count to i8254_max_count.phk2008-03-262-50/+51
| | | | | Rename timer0_real_max_count to i8254_real_max_count and make it static. Rename timer_freq to i8254_freq and make it a loader tunable.
* The RTC related pscnt and psdiv variables have no business being public.phk2008-03-261-2/+2
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* Use cpu_spinwait() (i.e., "pause") when spinning on rdtsc during DELAY().jhb2008-01-171-0/+1
| | | | MFC after: 1 week
* Replace explicit calls to video methods with their respective variantswkoszek2007-12-291-6/+4
| | | | | | | | | | | | | | | implemented with macros. This patch improves code readability. Reasoning behind vidd_* is a sort of "video discipline". List of macros is supposed to be complete--all methods of video_switch ought to have their respective macros from now on. Functionally, this code should be no-op. My intention is to leave current behaviour of touched code as is. No objections: rwatson Silence on: freebsd-current@ Approved by: cognet
* Split /dev/nvram driver out of isa/clock.c for i386 and amd64. I have notpeter2007-10-261-96/+1
| | | | | | | | refactored it to be a generic device. Instead of being part of the standard kernel, there is now a 'nvram' device for i386/amd64. It is in DEFAULTS like io and mem, and can be turned off with 'nodevice nvram'. This matches the previous behavior when it was first committed.
* It seems that some i386 mothermoards either do not implement thedwmalone2007-07-271-1/+2
| | | | | | | | | | | | | | | | | | day of week field correctly, or they remember bad values that are written into the day of week field. For this reason, ignore the day of week field when reading the clock on i386 rather than bailing if it is set incorrectly. Problems were seen on a number of platforms, including VMWare, qemu, EPIA ME6000, Epox-3PTA and ABIT-SL30T. This is a slightly different fix to that proposed by Ted in his PR, but the same basic idea. PR: 111117 Submitted by: Ted Faber <faber@lunabase.org> Approved by: re (rwatson) MFC after: 3 weeks
* If clock_ct_to_ts fails to convert time time from the real time clock,dwmalone2007-07-231-3/+6
| | | | | | | | | print a one line error message. Add some comments on not being able to trust the day of week field (I'll act on these comments in a follow up commit). Approved by: re MFC after: 3 weeks
* Prototype (but functional) Linux-ish /dev/nvram interface to the extrapeter2007-06-151-0/+99
| | | | | | | | | | | | 114 bytes of cmos ram in the PC clock chip. The big difference between this and the Linux version is that we do not recalculate the checksums for bytes 16..31. We use this at work when cloning identical machines - we can copy the bios settings as well. Reading /dev/nvram gives 114 bytes of data but you can seek/read/write whichever bytes you like. Yes, this is a "foot, gun, fire!" type of device.
* Despite several examples in the kernel, the third argument ofdwmalone2007-06-041-1/+1
| | | | | | | | | | | | | sysctl_handle_int is not sizeof the int type you want to export. The type must always be an int or an unsigned int. Remove the instances where a sizeof(variable) is passed to stop people accidently cut and pasting these examples. In a few places this was sysctl_handle_int was being used on 64 bit types, which would truncate the value to be exported. In these cases use sysctl_handle_quad to export them and change the format to Q so that sysctl(1) can still print them.
* When trying to allocate a PnP BIOS memory resource, the code loops tryingjhb2007-04-171-1/+1
| | | | | | | to move up the start address until the allocation succeeds. If the alignment of the resource was 0, then the code would keep trying the same request in an infinite loop and hang. Force the request to always move start up by at least 1 byte each time through the loop.
* Partial fix for a bug in rev.1.231. If suspend/resume clobbers thebde2007-03-051-0/+1
| | | | | | | | | | | | | | | | | RTC state, then it may clobber the RTC index register, so the index register must be restored before using it to restore control registers in rtc_restore(). The following problems remain: - rtc_restore() is only called if pmtimer is configured. Buggy suspend/resumes are more likely to clobber the index register than a control register, so pmtimer is more needed than it used to be. - pmtimer doesn't exist for amd64. - Restoring of the RTC state may race with rtcintr(). If an RTC interrupt is handled before the state is restored, then rtcin(RTC_INTR) in rtcintr() may read from the wrong register, so rtcintr() may spin forever. This may be mitigated by the most common state clobbering being to turn off RTC interrupts.
* style(9).nyan2007-03-041-2/+2
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* Use pause() rather than tsleep() on explicit global dummy variables.jhb2007-02-271-2/+1
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* o break newbus api: add a new argument of type driver_filter_t topiso2007-02-232-7/+10
| | | | | | | | | | | | | bus_setup_intr() o add an int return code to all fast handlers o retire INTR_FAST/IH_FAST For more info: http://docs.freebsd.org/cgi/getmsg.cgi?fetch=465712+0+current/freebsd-current Reviewed by: many Approved by: re@
* Cleaned up declaration and initialization of clock_lock. It is onlybde2007-01-231-13/+10
| | | | | | | | | | | | | | | | | | | | used by clock code, so don't export it to the world for machdep.c to initialize. There is a minor problem initializing it before it is used, since although clock initialization is split up so that parts of it can be done early, the first part was never done early enough to actually work. Split it up a bit more and do the first part as late as possible to document the necessary order. The functions that implement the split are still bogusly exported. Cleaned up initialization of the i8254 clock hardware using the new split. Actually initialize it early enough, and don't work around it not being initialized in DELAY() when DELAY() is called early for initialization of some console drivers. This unfortunately moves a little more code before the early debugger breakpoint so that it is harder to debug. The ordering of console and related initialization is delicate because we want to do as little as possible before the breakpoint, but must initialize a console.
* Be consistent with the spelling of "dependent" in user-visible places.ceri2006-12-301-1/+1
| | | | | PR: kern/27429 Submitted by: T. William Wells
* Optimized RTC accesses by avoiding null writes to the index registerbde2006-12-031-9/+16
| | | | | | | | | | | | | | | | | | | | | | | | | and by only delaying when an RTC register is written to. The delay after writing to the data register is now not just a workaround. This reduces the number of ISA accesses in the usual case from 4 to 1. The usual case is 2 rtcin()'s for each RTC interrupt. The index register is almost always RTC_INTR for this. The 3 extra ISA accesses were 1 for writing the index and 2 for delays. Some delays are needed in theory, but in practice they now just slow down slow accesses some more since almost eveyone including us does them wrong so modern systems enforce sufficient delays in hardware. I used to have the delays ifdefed out, but with the index register optimization the delays are rarely executed so the old magic ones can be kept or even implemented non- magically without significant cost. Optimizing RTC interrupt handling is more interesting than it used to be because RTC interrupts are currently needed to fix the more efficient apic timer interrupts on some systems. apic_timer_hz is normally 2000 so the RTC interrupt rate needs to be 2048 to keep the apic timer firing on such systems. Without these changes, each RTC interrupt normally took 10 ISA accesses (2 PIC accesses and 2 sets of 4 RTC accesses). Each ISA access takes 1-1.5uS so 10 of then at 2048 Hz takes 2-3% of a CPU. Now 4 of them take 0.8-1.2% of a CPU.
* Use calendaric calculation support from subr_clock.c instead of home-rolled.phk2006-10-021-88/+33
| | | | Eventually, this RTC should probably use subr_rtc.c as well
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