Replace many pasted identical definitions of cpu_initclocks() with a common
implementation in arm/machdep.c.
aicasm: Don't complain about missing prototypes to ease bootstrap issues.
Vybrid: Add driver for Inter-Integrated Circuit (I2C).
imx6: Initialize the Low Power Mode bits to keep the ARM cores running
during WFI.
All our current ARM multi-core systems have all cores in one package with
a shared L2 cache, reflect that in the common cpu_topo() routine.
mpcore timer: Supply a DELAY() implementation via weak linkage, so that
SoC-specific code can supply a better implementation.
imx6: Add some rudimentary voltage control.
Add an armv7 implementation of cpu_sleep().
Add __used attribute so that the DELAY implementation doesn't get
optimized away as unreferenced, causing linker errors when trying to
resolve the weak reference to the missing function.
ian [Fri, 16 May 2014 01:30:30 +0000 (01:30 +0000)]
MFC r257854 (discussed with alc@)
As of r257209, all architectures have defined
VM_KMEM_SIZE_SCALE. In other words, every architecture is now
auto-sizing the kmem arena. This revision changes kmeminit() so
that the definition of VM_KMEM_SIZE_SCALE becomes mandatory and
the definition of VM_KMEM_SIZE becomes optional.
Replace or eliminate all existing definitions of VM_KMEM_SIZE.
With auto-sizing enabled, VM_KMEM_SIZE effectively became an
alternate spelling for VM_KMEM_SIZE_MIN on most architectures.
Use VM_KMEM_SIZE_MIN for clarity.
Move the declaration for mpentry() into a header file instead of pasting
it into a bunch of different .c files.
If the L2 cache type is PIPT, pass a physical address for a flush.
Actually set the proper bit to indicate TTB shared memory.
Add a new cache maintenance function, idcache_inv_all, to the table, and
implementations for each of the chips we support.
Invalidate caches immediately upon entry to init_secondary(). Also set
the Bufferable bit in the PDE entries of the secondary processor startup
pagetables.
Add the bits needed to run SMP on imx6.
Invalidate the SCU cache tag ram on all 4 cores, not just 1-3.
Minor tweaks to the imx GPT timer
Vybrid enhancements...
- Pin configuration is a complete iomux register now and includes
drive strength, pull mode, mux mode, speed, etc.
- Add i2c devices to the tree
- Add IPG clock
- Add support for Quartz Module.
- Pin configuration is a complete iomux register now and includes
drive strength, pull mode, mux mode, speed, etc.
- Add i2c devices to the tree
- Add IPG clock
Add a driver to provide access to imx6 on-chip one-time-programmble data.
Make it possible to access the ocotp registers before the ocotp device
is attached, by establishing a temporary mapping of the registers when
necessary.
It turns out Freescale cleverly made the ocotp device compatible across
several different families of SoCs, so move it to the freescale directory
and prefix everything with fsl rather than imx6.
Convert the imx6 sdhci "R1B fix" from a busy-loop in the interrupt handler
to a callout.
Increase the wait time for acquiring the SD bus from 10 to 250ms.
If no compatible cards were found after probing the SD bus, say so.
Add timeout logic to sdhci, separate from the timeouts done by the hardware.
After a timeout, reset the controller using SDHCI_RESET_CMD|SDHCI_RESET_DATA
rather than SDHCI_RESET_ALL; the latter turns off clocks and power, removing
any possibility of recovering from the error.
Add a helper routine to depth-search the device tree for a node with a
matching 'compatible' property.
On armv6 and later, use the WriteNotRead bit of the fault status register
to decide what protections are required by the faulting access.
Use the right symbols for determining arm architecture. Include the
necessary header file which has the new FAULT_WNR symbol defined in it.
Allow the kernel to be loaded at any 1MiB address. This requirement is
because we use the 1MiB section maps as they only need a single pagetable.
Add function for configuring Vybrid PLL4 (Audio) clock frequency output.
imx6 changes ...
- Fix the definition of the SDHCI_STATE_DAT and SDHCI_STATE_CMD fields,
and add SDHCI_RETUNE_REQUEST. None of these are actually used in the
code yet.
- Write translation code for the SDHCI_PRESENT_STATE register.
Freescale moved some bits around in their version of the register,
adjust things so that the sdhci code sees the standard layout.
- Add standard non-removable and cd-gpios properties to the usdhc
devices. That generates references to gpio devices, so uncomment them
even though there isn't a gpio driver to do anything with them yet.
- Add handling of standard "non-removable" property, and also some
workaround code so that if card detect is wired to a gpio pin, for now
we just treat it the same as non-removable (because there isn't a gpio
driver yet).
- Enable both sdcard slots, but not the sdio-based wifi that we don't
yet have a driver for.
ian [Thu, 15 May 2014 21:41:32 +0000 (21:41 +0000)]
MFC r261786, r261789
Rework the EARLY_PRINTF mechanism. Instead of defining a special eprintf()
routine, now a platform can provide a pointer to an early_putc() routine
which is used instead of cn_putc(). Control can be handed off from early
printf support to standard console support by NULLing out the pointer
during standard console init.
Convert two while(1); statements into proper panics.
Better nomatch messages: include compat string. Also, flag devices as
disabled in the successful probe message, but leave what that means to
the actual driver (no semantic changes).
Fix Embest board name and id.
Honor the disabled status by only grabbing resources and returning
when running under FDT in the AT91 SPI driver.
Consolidate code related to setting up physical memory configuration into
a new physmem.c file.
Replace compile-time constant KERNPHYSADDR with abp_physaddr
Calculate the kernel's load address from the PC in the elf / gzip
trampoline instead of relying on KERNPHYSADDR as a compile-time constant.
It turns out a global variable is the only straightforward way to
communicate the kernel's physical load address from where it's known in
initarm() into cpu_mp_start() which is called from non-arm code and
takes no parameters.
Remove the now unused MMU_INIT macro.
Use vm_paddr_t, not vm_offset_t, when dealing with physical addresses.
No need to set physmem in each initarm() instance anymore, it's handled
in common code now.
Pass the pagetable used from locore.S to initarm to allow it to map data
in as required.
Fix the physmem exclude-region clipping logic for the edge-trim case.
Add some extra debugging output when DEBUG is defined.
Update legacy platforms to use new arm_physmem helper routines.
ian [Thu, 15 May 2014 19:09:31 +0000 (19:09 +0000)]
MFC r257549, r261642
Don't create a distinct free page pool for segregating allocations that are
accessed through the direct map unless the kernel configuration actually
includes a direct map. Only a few configurations do, and for the rest the
unnecessary free page pool is a small pessimization.
Remove the ARM_USE_SMALL_ALLOC option and code related to it.
cperciva [Thu, 15 May 2014 18:07:35 +0000 (18:07 +0000)]
MFC r265876:
In cf_get_method, when we don't already know what clock speed the CPU is
running at, guess the nearest value instead of looking for a value within
25 MHz of the observed frequency.
Prior to this change, if a system booted with Intel Turbo Boost enabled,
the dev.cpu.0.freq sysctl is nonfunctional, since the ACPI-reported
frequency for Turbo Boost states does not match the actual clock frequency
(and thus no levels are within 25 MHz of the observed frequency) and the
current performance level is read before a new level is set.
Relnotes: Bug fix in power management on CPUs with Intel Turbo Boost
Move Open Firmware device root on PowerPC, ARM, and MIPS systems to
a sub-node of nexus (ofwbus) rather than direct attach under nexus. This
fixes FDT on x86 and will make coexistence with ACPI on ARM systems easier.
SPARC is unchanged.
Add the missing ')' at end of sentence. Reword it to use a more common idiom.
Pass the kernel physical address to initarm through the boot param struct.
Make functions only used in vfp.c static, and remove vfp_enable.
Fix __syscall on armeb EABI. As it returns a 64-bit value it needs to
place 32-bit data in r1, not r0. 64-bit data is already packed correctly.
Use abp_physaddr for the physical address over KERNPHYSADDR. This helps us
remove the need to load the kernel at a fixed address.
Remove references to PHYSADDR where it's used only in debugging output.
Dynamically generate the page table. This will allow us to detect the
physical address we are loaded at to change the mapping.
ian [Thu, 15 May 2014 16:59:47 +0000 (16:59 +0000)]
MFC r261414, r261415, r261417, r261418, r261419
Don't call device_set_ivars() for the mmchs
Change the way pcpu and curthread are stored per-core
Invalidate cachelines for bounce pages on PREREAD too, there may still be
stale entries from a previous transfer.
Only use the CPU ID register if SMP is defined. Some non-MPCore armv6 cpu,
such as the one found in the RPi, don't have it, and just hang when we try
to access it.
loos [Thu, 15 May 2014 15:47:52 +0000 (15:47 +0000)]
MFC r259125, r264019, r264083, r264153, r264197
r259125:
Fix a few typos on the scm (control module) pin mux definitions.
r264019:
Fix some of the style(9) problems on ti_gpio.
Remove redundant code and declarations.
r264083:
Move the GPIO bank initialization to a new function to make easier to detect
errors.
Reset the GPIO module during the initialization. This is guaranteed to be
the same as a hardware reset. Tested on AM335x (BBB) and checked against
the omap3 and omap4 TRM.
Do a better job freeing resources when there are errors and on
ti_gpio_detach().
r264153:
- Fix the setup of interrupts for banks 2 and 3 on AM335x.
On AM335x each one of the four GPIO banks has two physical interrupt
lines, so we now allocate resources and setup our interrupt handler for
all the (8) available interrupts.
On OMAP3 and OMAP4 there is only one interrupt for each GPIO bank (6
banks, 6 interrupts), but there are two set of registers where the
first one is used to setup the delivery of interrupts to the MPU and
the second set, setup the delivery of interrupts to the DSP.
On AM335x, each set of registers controls each one of the interrupt
lines.
- Remove nonexistent registers for OMAP4 and AM335x, replace their use with
the correct ones for these SoCs.
- Remove stray whitespace.
r264197:
Partially revert r264083.
While it is the recommended initialization procedure, it hangs on the reset
of the second GPIO module on pandaboard.
Removes the module reset for now as more investigation is needed.
ian [Thu, 15 May 2014 15:43:33 +0000 (15:43 +0000)]
MFC r261406, r261409: enhance Vybrid support...
o Expand device tree information
o Export iomuxc (pins) configuration to DTS
o Allow devices to assign clocks in DTS
o Split kernel configuration to chip common and board specific parts.
loos [Thu, 15 May 2014 15:15:23 +0000 (15:15 +0000)]
MFC r265012, r265191, r265289, r265310
r265012:
Fix the gpio-specifier decoding by respecting the GPIO controller's
#gpio-cells property.
Add a new ofw_bus method (OFW_BUS_MAP_GPIOS()) that allows the GPIO
controller to implement its own mapping to deal with gpio-specifiers,
allowing the decoding of gpio-specifiers to be controller specific.
The default ofw_bus_map_gpios() decodes the linux standard (#gpio-cells =
<2>) and the FreeBSD standard (#gpio-cells = <3>).
It pass the gpio-specifier flag field to the children as an ivar variable so
they can act upon.
r265191:
Remove unnecessary headers. Sort out the headers. Add a missing header on
ofw_gpiobus.c (it was working because of sys/libkern.h).
r265289:
eally sort out the headers.
sys/systm.h must always come after sys/param.h.
Remove sys/types.h which should never be included together with sys/param.h.
Add sys/malloc.h for correctness even if it seems to don't be needed.
Remove more unused headers found by unusedinc (from bde@).
r265310:
Move gpiobus routines to dev/gpio. Avoid polluting ofw_bus with bus
specific parts.
Open Firmware interrupt specifiers can consist of arbitrary-length byte
strings and include arbitrary information (IRQ line/domain/sense). When the
ofw_bus_map_intr() API was introduced, it assumed that, as on most systems,
these were either 1 cell, containing an interrupt line, or 2, containing
a line number plus a sense code. It turns out a non-negligible number of
ARM systems use 3 (or even 4!) cells for interrupts, so make this more
general.
Provide a simpler and more standards-compliant simplebus implementation to
get the Routerboard 800 up and running with the vendor device tree. This
does not implement some BERI-specific features (which hopefully won't be
necessary soon), so move the old code to mips/beri, with a higher attach
priority when built, until MIPS interrupt domain support is rearranged.
Allow nesting of simplebuses.
Add a set of helpers (ofw_bus_get_status() and ofw_bus_status_okay()) to
process "status" properties of OF nodes.
r258046:
Fix a typo on a comment in ofw_bus_if.m, the default method will return -1
when a node doesn't exist.
r258047:
Move the KASSERT() check to the point before the increase of number of pins.
r258050:
Fix gpiobus to return BUS_PROBE_GENERIC insted of BUS_PROBE_SPECIFIC (0) so
it can be overriden by its OFW/FDT version.
Give a chance for GPIO devices that implement the device_identify method to
attach.
r259035:
Remove unnecessary includes and an unused softc variable. While here apply
two minor style(9) fixes.
r259036:
Move the GPIOBUS_SET_PINFLAGS(..., ..., pin, GPIO_PIN_OUTPUT) to led(4)
control callback function. This makes gpioled(4) works even if the pin
is accidentally set to an input.
r259037:
Fix the pin value reading on AM335x. Because of the inverted logic it was
always returning '0' for all the reads, even for the outputs. It is now
known to work with gpioiic(4) and gpioled(4).
r261842:
Add an OFW GPIO compatible bus. This allows the use of the DTS files to
describe GPIO bindings in the system.
Move the GPIOBUS lock macros to gpiobusvar.h as they are now shared between
the OFW and the non OFW versions of GPIO bus.
Export gpiobus_print_pins() so it can also be used on the OFW GPIO bus.
r261843:
Add OFW support to the in tree gpio compatible devices: gpioiic(4) and
gpioled(4).
Tested on RPi and BBB (using the hardware I2C controller and gpioiic(4) for
the I2C tests). It was also verified for regressions on RSPRO (MIPS/ar71xx)
used as reference for a non OFW-based system.
Update the gpioled(4) and gpioiic(4) man pages with some details and
examples about the FDT/OFW support.
Some compatibility details pointed out by imp@ will follow in subsequent
commits.
r261844:
Allow the use of OFW I2C bus together with iicbb(4) on OFW-based systems.
This change makes ofw_iicbus attach to iicbb(4) controllers in addition to
the already supported i2c host bridges (iichb).
On iicbb(4) allow the direct access of the OFW parent node by its children,
so they can be directly attached to iicbb(4) node on the DTS without the
need of describing the i2c bus.
r261845:
Allow the use of the OFW GPIO bus for ti_gpio and bcm2835_gpio. With this
change the gpio children can be described as directly connected to the GPIO
controller without the need of describing the OFW GPIO bus itself on the
DTS file.
With this commit the OFW GPIO bus is fully functional on BBB and RPi.
GPIO controllers which want to use the OFW GPIO bus will need similar
changes.
r261846:
Make the gpioled(4) work out of the box on BBB.
Add gpioled(4) to BEAGLEBONE kernel and add the description of the four
on-board leds of beaglebone-black to its DTS file.
r262194:
Remove an unnecessary header.
r262522:
Fix make depend for iicbus.
r262559:
Inspired by r262522, fix make depend. This fixes the build of gpio modules.
ian [Wed, 14 May 2014 23:51:07 +0000 (23:51 +0000)]
MFC r260886, r261165, r261171, r261172, r261214
Fix gcc with -Wstrict-prototypes by telling it bi_emac takes no
parameters.
Bus space handles need to be the VA of the requested resource, not the
rounded page VA. Correct so the DBGU device can be mapped for FDT
console since it isn't on a page boundary.
Make early printf output nicer by inserting a carriage return before
any linefeeds that are output.
Before resetting the USART, delay a bit to allow the transmitter to
finish the current character to drain to avoid glitching. Also,
simplify the code a smidge.
loos [Wed, 14 May 2014 23:33:38 +0000 (23:33 +0000)]
MFC r258044, r258679, r263990
Adds gpioiic.4 and gpioled.4 man pages. Moves some of the information that
was previously available on gpio.4 to their respectives pages. Add the
cross references on gpioctl.8.
Add common bus_space tag definition shared for most supported ARMv6/v7 SoCs.
Correct license statements to reflect the fact that these files were all
derived from sys/arm/mv/bus_space.c.
In pmap_unmapdev(), remember the size, and use that as an argument to
kva_free(), or we'd end up always passing it a size of 0
In pmap_mapdev(), first check whether a static mapping exists,
Convert TI static device mapping to use the new arm_devmap_add_entry(),
Use the common armv6 fdt_bus_tag defintion for tegra instead of a local copy.
Eliminate use of fdt_immr_addr(), it's not needed for tegra
Convert lpc from using fdt_immr style to arm_devmap_add_entry() to make
static device mappings.
Retire machine/fdt.h as a header used by MI code, as its function is now
obsolete. This involves the following pieces:
- Remove it entirely on PowerPC, where it is not used by MD code either
- Remove all references to machine/fdt.h in non-architecture-specific code
(aside from uart_cpu_fdt.c, shared by ARM and MIPS, and so is somewhat
non-arch-specific).
- Fix code relying on header pollution from machine/fdt.h includes
- Legacy fdtbus.c (still used on x86 FDT systems) now passes resource
requests to its parent (nexus). This allows x86 FDT devices to allocate
both memory and IO requests and removes the last notionally MI use of
fdtbus_bs_tag.
- On those architectures that retain a machine/fdt.h, unused bits like
FDT_MAP_IRQ and FDT_INTR_MAX have been removed.
Add #include <machine/fdt.h> to a few files that used to get it via pollution
Enable the mv cesa security/crypto device by providing the required property
in the dts source, and adding the right devices to the kernel config.
Remove dev/fdt/fdt_pci.c, which was code specific to Marvell ARM SoCs,
related to setting up static device mappings. Since it was only used by
arm/mv/mv_pci.c, it's now just static functions within that file, plus
one public function that gets called only from arm/mv/mv_machdep.c.
Switch RPi to using arm_devmap_add_entry() to set up static device mapping.
Allow 'no static device mappings' to potentially work.
Don't try to find a static mapping before calling pmap_mapdev(), that logic
is now part of pmap_mapdev() and doesn't need to be duplicated here.
Switch a10 to using arm_devmap_add_entry() to set up static device mapping.
ian [Wed, 14 May 2014 17:43:49 +0000 (17:43 +0000)]
MFC r260118
Delete echoed doesn't rub out the previous character, so always
use <backspace> <space> <backspace> instead. This fixes hitting
DELETE instead of BACKSPACE at mountroot> prompt.
ian [Wed, 14 May 2014 17:01:35 +0000 (17:01 +0000)]
MFC r256707, r256708, r257291, r258358
Switch to use WBWA mappings for page tables on armv6, this is needed for SMP.
Fix PTE_SYNC() for PIPT L2 caches, using the virtual address wasn't so useful.
Use PTE_SYNC() for >= armv6
Spell cpu_l2cache_wb_range correctly.
Fix condition that determines PMAP_NEEDS_PTE_SYNC value for ARM
Use values of the correct defines to determine statement's result.
ARM_ARCH_ symbols are always defined, hence only values are relevant.
Avoid clearing EXEC permission bit when setting the page RW on ARMv6/v7
When emulating modified bit the executable attribute was cleared by
mistake when calling pmap_set_prot().
The kernel stack guard pages are only below the stack pointer, not above.
Remove unnecessary double-setting of the thread's onfault state in
copyinstr().
Open Firmware mandates that certain cross-references, in particular those
in /chosen, be ihandles. The ePAPR spec makes those cross-reference phandles,
since FDT has no concept of ihandles. Have the OF FDT CI module interpret
queries about ihandles as cross-reference phandles.
Real OF systems have an ihandle under /chosen/stdout, not a phandle. Use
the right type.
Rearchitect platform memory map parsing to make it less
Open Firmware-centric.
Remove fdtbus_bs_tag definition, which is now obsolete. The remainder of
this file is also slated for future demolition.
Return the correct IEEE 1275 code for "nextprop".
Use the common Open Firmware PCI interrupt routing code instead of the
duplicate version in dev/fdt.
Configure interrupt sense based on device tree information.
Simplify the ofw_bus_lookup_imap() API slightly: make it allocate maskbuf
internally instead of requiring the caller to allocate it.
Do not assume a value for #address-cells when parsing the OF translations
map. This allows the kernel to get farther with OpenBIOS on 64-bit CPUs.
Actually look up #address-cells instead of assuming it is correlated with
the Uninorth version number.
#interrupt-cells belongs to the iparent, not the device parent.
Add a sysctl to allow disabling resetting the OF syscons.
For PCI<->PCI bridges, #address-cells may be 3.
Make RTAS calls, which call setfault() to recover from machine checks,
preserve any existing fault buffer.
badaddr() is used only in the grackle PCI driver, so move its definition
there. Clean up a spurious setfault() declaration as well.
This [phyp_console] driver doesn't need the /options node, so don't check
for it.
Use the Open Firmware-based CPU frequency determination as a generic
fallback if we can't measure CPU frequency. This is also useful on a
variety of embedded systems using FDT.
marius [Wed, 14 May 2014 13:47:50 +0000 (13:47 +0000)]
MFC: r265454
- Allow foot shooting with the resetconfig command via the -f option.
- Fix typos preventing -f to actually work with the create command.
- Initialize flags to zero rather than using stack garbage when handling
the grow command.
Sponsored by: Bally Wulff Games & Entertainment GmbH
ian [Wed, 14 May 2014 04:42:38 +0000 (04:42 +0000)]
MFC r258247, r258250, r258257
Remove a pointless #ifdef AIM. This is just PPC64 specific, including
64-bit Book-E.
Make single precision floating point arithmetic actually work
Split the function of the PCB_FPU flags into two: PCB_FPU now indicates that
the actual FPU is enabled, while PCB_FPREGS indicates that the FPU state
structure in the PCB is valid.
Follow up r223485, which made AIM use the ABI thread pointer instead of
PCPU fields for curthread, by doing the same to Book-E.
Use the same implementation of copyinout.c for both AIM and Book-E.
Actually add IOMMU domain to the list of known mappings.
Following the approach with ACPI DMAR on x86, split IOMMU handling into
a variant PCI bus instead of trying to shoehorn it into the PCI host bridge
adapter.
Make sure that TLB1 mappings are aligned correctly.
Teach nexus(4) about Open Firmware (e.g. FDT) on ARM and MIPS, retiring
fdtbus in most cases.
Make OF_nextprop() work correctly for FDT by using the libfdt
fdt_next_property_offset() API.
Do not panic if pmap_mincore() is called.
An addendum: it is possible, though of questionable utility, for a node
to have no properties at all.
Add definition for the Atheros 8021 gigabit PHY.
Consolidate Apple firmware hacks and improve them by switching on the
presence of mac-io devices in the tree, which uniquely identifies Apple
hardware.
Allow OF_decode_addr() to also be able to map resources on big-endian
devices.
Make tsec work with the device tree present on the RB800.
Be more flexible about which compatible strings to accept. This brings up
the PCI Express bus on the RB800 using the firmware device tree.
Rename the "bare" platform "mpc85xx", which is what it actually is, and
add actual platform probing based on PVR.
ian [Wed, 14 May 2014 00:51:26 +0000 (00:51 +0000)]
MFC r257161, r257169, r257178, r257190, r257191
Add pmap_mapdev_attr() and pmap_kenter_attr() interfaces.
Fix concurrency issues with TLB1 updates and make pmap_kextract() search
TLB1 mappings as well
Interrelated improvements to early boot mappings:
- Remove explicit requirement that the SOC registers be found except as an
optimization (although the MPC85XX LAW drivers still require they be found
externally, which should change).
- Remove magic CCSRBAR_VA value.
- Allow bus_machdep.c's early-boot code to handle non 1:1 mappings and
systems not in real-mode or global 1:1 maps in early boot.
- Allow pmap_mapdev() on Book-E to reissue previous addresses if the
area is already mapped. Additionally have it check all mappings, not
just the CCSR area.
Add some extra sanity checking and checks to printf format specifiers.
Bump initial TLB size. The kernel is not necessarily less than 16 MB
Handle (in a slightly ugly way) ePAPR-type loaders that just place a
device tree into r3.
ian [Tue, 13 May 2014 19:12:53 +0000 (19:12 +0000)]
MFC r257162, r257175
The old trap.h (then trap_aim.h) actually had trap ID codes for Book-E CPUs.
Use it universally. Book-E traps may also need revisiting due to the
introduction of fixed-offset traps and the deprecation of IVORs in POWER
ISA 2.06, but that's very much an issue for another day.
ian [Tue, 13 May 2014 19:09:00 +0000 (19:09 +0000)]
MFC r257111, r257144, r257157, r257183
Test UARTs physical address instead of virtual.
Be a bit more flexible in how we find the console from the properties on
/chosen, following the list of allowed console properties in ePAPR. Also
do not require that stdin be defined and equal to stdout: stdin is
nonstandard (for ePAPR) and console in an unexpected place is after all
better than no console.
ian [Tue, 13 May 2014 18:14:31 +0000 (18:14 +0000)]
MFC r257114, r257118
Use common OFW root code to set up fdtbus. This is an almost purely
negative diff that should improve reliability somewhat. There should be
no differences in behavior -- please report any that crop up. This has been
tested on ARM and PPC systems.
Make sure to get the right node when looking up #interrupt-cells.
ian [Tue, 13 May 2014 18:08:15 +0000 (18:08 +0000)]
MFC r257093:
Be a little more suspicious of thermal sensors, which can have single
crazy readings occasionally. One wild reading should not be enough to
trigger a shutdown, so instead wait for several concerning readings in
a row.
Add two new interfaces to ofw_bus:
- ofw_bus_map_intr()
Maps an (iparent, IRQ) tuple to a system-global interrupt number in some
platform dependent way. This is meant to be implemented as a replacement
for [FDT_]MAP_IRQ() that is an MI interface that knows about the bus
hierarchy.
- ofw_bus_config_intr()
Configures an interrupt (previously mapped) based on firmware sense flags.
This replaces manual interpretation of the sense field in bus drivers and
will, in a follow-up, allow that interpretation to be redirected to the PIC
drivers where it belongs. This will eventually replace the tables in
/sys/dev/fdt/fdt_ARCH.c
The PowerPC/AIM code has been converted to use these globally, with an
implementation in terms of MAP_IRQ() and powerpc_config_intr(), assuming
OpenPIC, at the bus root in nexus(4). The ofw_bus_config_intr() will shortly
be integrated into pic_if.m and bounced through nexus into the PIC tree.
Factor out MI portions of the PowerPC nexus device into /sys/dev/ofw. The
sparc64 driver will be modified to use this shortly.
Allow PIC drivers to translate firmware sense codes for themselves. This
is designed to replace the tables in dev/fdt/fdt_ARCH.c, but will not
happen quite yet.
Do not map IRQs twice. This fixes PowerPC/FDT systems with multiple PICs,
which would try to treat the previously-mapped interrupts from
fdt_decode_intr() as interrupt line numbers on the same parent PIC.
Remove some of the code required for supporting ssm(4) on SPARC in favor
of a more PowerPC/FDT-focused design. Whenever SPARC64 is integrated
into this rework, this should be (trivially) revisited.
ian [Tue, 13 May 2014 18:00:41 +0000 (18:00 +0000)]
MFC r256973, r256974
If the device tree directly contains the timebase frequency, use it. This
property is required by ePAPR, but maintain the fallback to bus-frequency
for compatibility. Allow 32 or 64 bits.
Add a new function (OF_getencprop()) that undoes the transformation applied
by encode-int. Specifically, it takes a set of 32-bit cell values and
changes them to host byte order. Most non-string instances of OF_getprop()
should be using this function, which is a no-op on big-endian platforms.
ian [Tue, 13 May 2014 17:18:48 +0000 (17:18 +0000)]
MFC r256901, r256914 (by nwhitehorn):
Catch up on 6 years of improvements in Open Firmware nexus devices by
importing the sparc64 one. At least 90% of this code is MI and will be
moved into /sys/dev/ofw at some point in the future.
Ignore registers on devices where the reg property is malformed. Issue a
warning if this happens under bootverbose. This prevents some
strange-looking entries in dmesg for SMU devices on Apple G5 systems.
Standards-conformance and code deduplication:
- Use bus reference phandles in place of FDT offsets as IRQ domain keys
- Unify the identical macio/fdt/mambo OpenPIC drivers into one
- Be more forgiving (following ePAPR) about what we need from the device
tree to identify an OpenPIC
- Correctly map all IRQs into an interrupt domain
- Set IRQ_*_CONFORM for interrupts on an unknown PIC type instead of
failing attachment for that device.
Allow lots of interrupts (useful on multi-domain platforms) and do not
set device_quiet() on all devices attached under nexus(4).
- Handle 2GB of ram
- Allow the OFW interrupt mapping code to work with PCI devices not
enumerated by Open Firmware, as in the case of FDT.
- Provide an interface for PCI bus drivers that need some of ofw_pci's
metadata during attach.
- Use standard ofw_bus helpers instead of reinventing the wheel.
- Make hard-wired TLB allocations be at minimum one page.
- Add support for UDP-Lite protocol (RFC 3828) to IPv4 and IPv6 stacks.
Tested with vlc and a test suite [1].
[1] http://www.erg.abdn.ac.uk/~gerrit/udp-lite/files/udplite_linux.tar.gz
Reviewed by: jhb, glebius, adrian
- Fix a logic bug which prevented the sending of UDP packet with 0 checksum.
- Disable TX checksum offload for UDP-Lite completely. It wasn't used for
partial checksum coverage, but even for full checksum coverage it doesn't
work.
alc [Tue, 13 May 2014 05:26:43 +0000 (05:26 +0000)]
MFC r265418
Prior to r254304, a separate function, vm_pageout_page_stats(), was used
to periodically update the reference status of the active pages. This
function was called, instead of vm_pageout_scan(), when memory was not
scarce. The objective was to provide up to date reference status for
active pages in case memory did become scarce and active pages needed to
be deactivated.
The active page queue scan performed by vm_pageout_page_stats() was
virtually identical to that performed by vm_pageout_scan(), and so r254304
eliminated vm_pageout_page_stats(). Instead, vm_pageout_scan() is
called with the parameter "pass" set to zero. The intention was that when
pass is zero, vm_pageout_scan() would only scan the active queue.
However, the variable page_shortage can still be greater than zero when
memory is not scarce and vm_pageout_scan() is called with pass equal to
zero. Consequently, the inactive queue may be scanned and dirty pages
laundered even though that was not intended by r254304. This revision
fixes that.
alc [Tue, 13 May 2014 05:21:54 +0000 (05:21 +0000)]
MFC r260567
Correctly update the count of stuck pages, "addl_page_shortage", in
vm_pageout_scan(). There were missing increments in two less common
cases.
Don't conflate the count of stuck pages and the pageout deficit provided
by vm_page_alloc{,_contig}().
Handle held pages consistently in the inactive queue scan. In the more
common case, we did not move the page to the tail of the queue. Whereas,
in the less common case, we did. There's no particular reason to move
the page in the less common case, so remove it.
Perform the calculation of the page shortage for the active queue scan a
little earlier, before the active queue lock is acquired. The correctness
of this calculation doesn't depend on the active queue lock being held.
Eliminate a redundant variable, "pcount". Use the more descriptive
variable, "maxscan", in its place.
Apply a few nearby style fixes, e.g., eliminate stray whitespace and
excess parentheses.