Up to [DragonFly] / src / sys / i386 / i386
Request diff between arbitrary revisions
Keyword substitution: kv
Default branch: MAIN
Reorganize the way machine architectures are handled. Consolidate the kernel configurations into a single generic directory. Move machine-specific Makefile's and loader scripts into the appropriate architecture directory. Kernel and module builds also generally add sys/arch to the include path so source files that include architecture-specific headers do not have to be adjusted. sys/<ARCH> -> sys/arch/<ARCH> sys/conf/*.<ARCH> -> sys/arch/<ARCH>/conf/*.<ARCH> sys/<ARCH>/conf/<KERNEL> -> sys/config/<KERNEL>
Ansify the rest of the K&R-style function declarations in sys/i386. Those were somehow[tm] forgotten last time. Noticed-by: corecode While I'm here, perform some stylistic cleanup in math_emulate.c.
Change the kernel dev_t, representing a pointer to a specinfo structure, to cdev_t. Change struct specinfo to struct cdev. The name 'cdev' was taken from FreeBSD. Remove the dev_t shim for the kernel. This commit generally removes the overloading of 'dev_t' between userland and the kernel. Also fix a bug in libkvm where a kernel dev_t (now cdev_t) was not being properly converted to a userland dev_t.
Rename the kernel NODEV to NOCDEV to avoid conflicts with the userland NODEV.
Rename malloc->kmalloc, free->kfree, and realloc->krealloc. Pass 1
Rename functions to avoid conflicts with libc.
Allow 'options SMP' *WITHOUT* 'options APIC_IO'. That is, an ability to produce an SMP-capable kernel that uses the PIC/ICU instead of the IO APICs for interrupt routing. SMP boxes with broken BIOSes (namely my Shuttle XPC SN95G5) could very well have serious interrupt routing problems when operating in IO APIC mode. One solution is to not use the IO APICs. That is, to run only the Local APICs for the SMP management. * Don't conditionalize NIDT. Just set it to 256 * Make the ICU interrupt code MP SAFE. This primarily means using the imen_spinlock to protect accesses to icu_imen. * When running SMP without APIC_IO, set the LAPIC TPR to prevent unintentional interrupts. Leave LINT0 enabled (normally with APIC_IO LINT0 is disabled when the IO APICs are activated). LINT0 is the virtual wire between the 8259 and LAPIC 0. * Get rid of NRSVIDT. Just use IDT_OFFSET instead. * Clean up all the APIC_IO tests which should have been SMP tests, and all the SMP tests which should have been APIC_IO tests. Explicitly #ifdef out all code related to the IO APICs when APIC_IO is not set.
ICU/APIC cleanup part 5/many. Start migrating the ICU and APIC interrupt interfaces to a new machine level interrupt ABI. This ABI will eventually be tied into the BUS architecture. Move INTRDIS/INTREN to the new API: machintr_intrdis(irq) and machintr_intren(irq). Get rid of ithread_unmask(). Have the interrupt thread code call machintr_intrdis(irq) directly.
ICU/APIC cleanup part 4/many. INTRDIS/INTREN only always take a single bit. Change the argument from a mask to a bit number to improve flexibility. Relabel the ICU IRQ's (IRQ0, IRQ1, ...) to ICU_IRQ* while we are at it.
ICU/APIC cleanup part 1/many. Move ICU and APIC support files into their own subdirectory, bump the required config version for the build since this move also requires the use of the new arch/ symlink.
Cleanup some of the newbus infrastructure. * Change the device_identify API to return success/failure, like most of the other newbus methods. This may be used for conflict resolution in the future. * Clearly document the device_identify method and formalize its use by adding discrimination between initial bus probes and bus rescans. Do not re-execute static identification code that has already been run every time a new driver is added at run-time. * Clearly document the do-ISA-last hack. * Provide generic routines for the most common device_identify operations (psueo or synthesized devices that operate under other devices, such as lpt operating under ppbus, which are not 'scanned' by the parent bus). * Remove the hacks that install and initialize the nexus device. Instead, use the existing DRIVER_MODULE infrastructure to install nexus under root_bus. * Document the boot-time initialization path so it doesn't take the next guy 8 hours to figure out what code is actually being run when.
Give the kernel a native NFS mount rpc capability for mounting NFS roots by splitting off the mount rpc code from the BOOTP code. The loader is no longer required to pass the nfs root mount file handle to the kernel. Pure tftp-based loaders with no knowledge of NFS can now pass a NFS root mount path to the kernel without having to pass a resolved NFS file handle. This change allows kernels booted from tftp loaders to have an NFS root without having to specify BOOTP (which sometimes doesn't work properly when done from both the loader and from the kernel).
Remove all remaining SPL code. Replace the mtd_cpl field in the machine dependant thread structure and the CPL field in the interrupt stack frame with dummies (so structural sizes do not change, yet). Remove all interrupt handler SPL mask and mask pointer code. Remove all spl*() functions except for splz(). Note that doreti uses a temporary CPL mask internally to accumulate a bitmap of FAST interrupts which could not be executed due to not being able to get the BGL. This mask has no outside visibility. Note that gd_fpending and gd_ipending still exist to support critical section interrupt deferment.
Remove spl*() calls from kern, replacing them with critical sections. Change the meaning of safepri from a cpl mask to a thread priority. Make a minor adjustment to tests within one of the buffer cache's critical sections.
Remove the 'ether' module dependancy, it is not defined anywhere and will prevent the loader from pre-loading the modules in question. Do not partially initialize the related struct sockaddr_in when a non-existant or "0.0.0.0" pxe related kenv is found. In particular, if the gateway is not specified by the DHCP server we avoid attempting to add a bad default route (which results in a panic) later on.
Do not use non-blocking malloc()'s in the busdma support code. A lot of drivers basically expect these functions to work, so they must work. It was originally believed that the ATA code might be effected but it turns out our ATA code does not (yet) use busdma. However, other disk drivers such as TWE *do* use it. Note that most drivers appear to use the busdma allocation functions at driver initialization rather then at run time.
udev2dev() can return NODEV now, make sure it doesn't crash autoconf's attempt to mount the root filesystem. Crash reported by: =?ISO-8859-1?Q?Stefan_Kr=FCger?= <email@example.com>
Device layer rollup commit. * cdevsw_add() is now required. cdevsw_add() and cdevsw_remove() may specify a mask/match indicating the range of supported minor numbers. Multiple cdevsw_add()'s using the same major number, but distinctly different ranges, may be issued. All devices that failed to call cdevsw_add() before now do. * cdevsw_remove() now automatically marks all devices within its supported range as being destroyed. * vnode->v_rdev is no longer resolved when the vnode is created. Instead, only v_udev (a newly added field) is resolved. v_rdev is resolved when the vnode is opened and cleared on the last close. * A great deal of code was making rather dubious assumptions with regards to the validity of devices associated with vnodes, primarily due to the persistence of a device structure due to being indexed by (major, minor) instead of by (cdevsw, major, minor). In particular, if you run a program which connects to a USB device and then you pull the USB device and plug it back in, the vnode subsystem will continue to believe that the device is open when, in fact, it isn't (because it was destroyed and recreated). In particular, note that all the VFS mount procedures now check devices via v_udev instead of v_rdev prior to calling VOP_OPEN(), since v_rdev is NULL prior to the first open. * The disk layer's device interaction has been rewritten. The disk layer (i.e. the slice and disklabel management layer) no longer overloads its data onto the device structure representing the underlying physical disk. Instead, the disk layer uses the new cdevsw_add() functionality to register its own cdevsw using the underlying device's major number, and simply does NOT register the underlying device's cdevsw. No confusion is created because the device hash is now based on (cdevsw,major,minor) rather then (major,minor). NOTE: This also means that underlying raw disk devices may use the entire device minor number instead of having to reserve the bits used by the disk layer, and also means that can we (theoretically) stack a fully disklabel-supported 'disk' on top of any block device. * The new reference counting scheme prevents this by associating a device with a cdevsw and disconnecting the device from its cdevsw when the cdevsw is removed. Additionally, all udev2dev() lookups run through the cdevsw mask/match and only successfully find devices still associated with an active cdevsw. * Major work on MFS: MFS no longer shortcuts vnode and device creation. It now creates a real vnode and a real device and implements real open and close VOPs. Additionally, due to the disk layer changes, MFS is no longer limited to 255 mounts. The new limit is 16 million. Since MFS creates a real device node, mount_mfs will now create a real /dev/mfs<PID> device that can be read from userland (e.g. so you can dump an MFS filesystem). * BUF AND DEVICE STRATEGY changes. The struct buf contains a b_dev field. In order to properly handle stacked devices we now require that the b_dev field be initialized before the device strategy routine is called. This required some additional work in various VFS implementations. To enforce this requirement, biodone() now sets b_dev to NODEV. The new disk layer will adjust b_dev before forwarding a request to the actual physical device. * A bug in the ISO CD boot sequence which resulted in a panic has been fixed. Testing by: lots of people, but David Rhodus found the most aggregious bugs.
if_xname support Part 2/2: Convert remaining netif devices and implement full support for if_xname. Restructure struct ifnet in net/if_var.h, pulling in a few minor additional changes from current including making if_dunit an int, and making if_flags an int. Submitted-by: Max Laier <firstname.lastname@example.org>
what the heck one last one before i go take a nap... remove __P(); from the i386 directory
kernel tree reorganization stage 1: Major cvs repository work (not logged as commits) plus a major reworking of the #include's to accomodate the relocations. * CVS repository files manually moved. Old directories left intact and empty (temporary). * Reorganize all filesystems into vfs/, most devices into dev/, sub-divide devices by function. * Begin to move device-specific architecture files to the device subdirs rather then throwing them all into, e.g. i386/include * Reorganize files related to system busses, placing the related code in a new bus/ directory. Also move cam to bus/cam though this may not have been the best idea in retrospect. * Reorganize emulation code and place it in a new emulation/ directory. * Remove the -I- compiler option in order to allow #include file localization, rename all config generated X.h files to use_X.h to clean up the conflicts. * Remove /usr/src/include (or /usr/include) dependancies during the kernel build, beyond what is normally needed to compile helper programs. * Make config create 'machine' softlinks for architecture specific directories outside of the standard <arch>/include. * Bump the config rev. WARNING! after this commit /usr/include and /usr/src/sys/compile/* should be regenerated from scratch.
LINT pass. Cleanup missed proc->thread conversions and get rid of warnings.
DEV messaging stage 2/4: In this stage all DEV commands are now being funneled through the message port for action by the port's beginmsg function. CONSOLE and DISK device shims replace the port with their own and then forward to the original. FB (Frame Buffer) shims supposedly do the same thing but I haven't been able to test it. I don't expect instability in mainline code but there might be easy-to-fix, and some drivers still need to be converted. See primarily: kern/kern_device.c (new dev_*() functions and inherits cdevsw code from kern/kern_conf.c), sys/device.h, and kern/subr_disk.c for the high points. In this stage all DEV messages are still acted upon synchronously in the context of the caller. We cannot create a separate handler thread until the copyin's (primarily in ioctl functions) are made thread-aware. Note that the messaging shims are going to look rather messy in these early days but as more subsystems are converted over we will begin to use pre-initialized messages and message forwarding to avoid having to constantly rebuild messages prior to use. Note that DEV itself is a mess oweing to its 4.x roots and will be cleaned up in subsequent passes. e.g. the way sub-devices inherit the main device's cdevsw was always a bad hack and it still is, and several functions (mmap, kqfilter, psize, poll) return results rather then error codes, which will be fixed since now we have a message to store the result in :-)
DEV messaging stage 1/4: Rearrange struct cdevsw and add a message port and auto-queueing mask. The mask will tell us which message functions can be safely queued to another thread and which still need to run in the context of the caller. Primary configuration fields (name, cmaj, flags, port, autoq mask) are now at the head of the structure. Function vectors, which may eventually go away, are at the end. The port and autoq fields are non-functional in this stage. The old BDEV device major number support has also been removed from cdevsw, and code has been added to translate the bootdev passed from the boot code (the boot code has always passed the now defunct block device major numbers and we obviously need to keep that compatibility intact).
MP Implementation 1/2: Get the APIC code working again, sweetly integrate the MP lock into the LWKT scheduler, replace the old simplelock code with tokens or spin locks as appropriate. In particular, the vnode interlock (and most other interlocks) are now tokens. Also clean up a few curproc/cred sequences that are no longer needed. The APs are left in degenerate state with non IPI interrupts disabled as additional LWKT work must be done before we can really make use of them, and FAST interrupts are not managed by the MP lock yet. The main thing for this stage was to get the system working with an APIC again. buildworld tested on UP and 2xCPU/MP (Dell 2550)
smp/up collapse stage 2 of 2: cleanup the globaldata structure, cleanup and separate machine dependant portions of thread, proc, and globaldata, and reduce the need to include lots of MD header files.
Finish migrating the cpl into the thread structure.
Add the DragonFly cvs id and perform general cleanups on cvs/rcs/sccs ids. Most ids have been removed from !lint sections and moved into comment sections.
import from FreeBSD RELENG_4 184.108.40.206