Change the kernel to add features to vircopy and safecopies so that
transparent copy fixing won't happen to avoid deadlocks, and such copies
fail with EFAULT.
Transparently making copying work from filesystems (as normally done by
the kernel & VM when copying fails because of missing/readonly memory)
is problematic as it can happen that, for file-mapped ranges, that that
same filesystem that is blocked on the copy request is needed to satisfy
the memory range, leading to deadlock. Dito for VFS itself, if done with
a blocking call.
This change makes the copying done from a filesystem fail in such cases
with EFAULT by VFS adding the CPF_TRY flag to the grants. If a FS call
fails with EFAULT, VFS will then request the range to be made available
to VM after the FS is unblocked, allowing it to be used to satisfy the
range if need be in another VFS thread.
Similarly, for datacopies that VFS itself does, it uses the failable
vircopy variant and callers use a wrapper that talk to VM if necessary
to get the copy to work.
. kernel: add CPF_TRY flag to safecopies
. kernel: only request writable ranges to VM for the
target buffer when copying fails
. do copying in VFS TRY-first
. some fixes in VM to build SANITYCHECK mode
. add regression test for the cases where
- a FS system call needs memory mapped in a process that the
FS itself must map.
- such a range covers more than one file-mapped region.
. add 'try' mode to vircopy, physcopy
. add flags field to copy kernel call messages
. if CP_FLAG_TRY is set, do not transparently try
to fix memory ranges
. for use by VFS when accessing user buffers to avoid
deadlock
. remove some obsolete backwards compatability assignments
. VFS: let thread scheduling work for VM requests too
Allows VFS to make calls to VM while suspending and resuming
the currently running thread. Does currently not work for the
main thread.
. VM: add fix memory range call for use by VFS
Change-Id: I295794269cea51a3163519a9cfe5901301d90b32
- Fix for possible unset uid/gid in toproto
- Fix for default mtree style
- Update libelf
- Importing libexecinfo
- Resynchronize GCC, mpc, gmp, mpfr
- build.sh: Replace params with show-params.
This has been done as the make target has been renamed in the same
way, while a new target named params has been added. This new
target generates a file containing all the parameters, instead of
printing it on the console.
- Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
get getservbyport() out of the inner loop
Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
. use netbsd sigframe, sigcontext struct
. netbsd sigframe *contains* sigcontext; use that directly
in kernel sigsend
. drop two fields from minix x86 stackframe.h (process context)
that were unused, retadr and st
use in-sigframe sigcontext
Change-Id: Ib59d699596dc3a78163dee59f19730482fdddf11
import/switch of:
init, getty, reboot, halt, shutdown, wall, last
changes:
. change reboot() call to netbsd prototype and args
. allows pristine <utmp.h>
. use clean <sys/reboot.h> instead of <minix/reboot.h>
. implement TIOCSCTTY for use by getty so getty can get
controlling terminal from init's child(ren)
. allow NULL envp for exec
Change-Id: I5ca02cb4230857140c08794bbfeba7df982c58a3
* Also change _orig to _intr for clarity
* Cleaned up {IPC,KER}VEC
* Renamed _minix_kernel_info_struct to get_minix_kerninfo
* Merged _senda.S into _ipc.S
* Moved into separate files get_minix_kerninfo and _do_kernel_call
* Adapted do_kernel_call to follow same _ convention as ipc functions
* Drop patches in libc/net/send.c and libc/include/namespace.h
Change-Id: If4ea21ecb65435170d7d87de6c826328e84c18d0
The set of processes to which a SIGKMESS signal is sent whenever new
diagnostics messages are added to the kernel's message buffer, is now
no longer hardcoded. Instead, processes can (un)register themselves
to receive such notifications, by means of sys_diagctl().
Change-Id: I9d6ac006a5d9bbfad2757587a068fc1ec3cc083e
* Renamed struct timer to struct minix_timer
* Renamed timer_t to minix_timer_t
* Ensured all the code uses the minix_timer_t typedef
* Removed ifdef around _BSD_TIMER_T
* Removed include/timers.h and merged it into include/minix/timers.h
* Resolved prototype conflict by renaming kernel's (re)set_timer
to (re)set_kernel_timer.
Change-Id: I56f0f30dfed96e1a0575d92492294cf9a06468a5
* Removed startup code patches in lib/csu regarding kernel to userland
ABI.
* Aligned stack layout on NetBSD stack layout.
* Generate valid stack pointers instead of offsets by taking into account
_minix_kerninfo->kinfo->user_sp.
* Refactored stack generation, by moving part of execve in two
functions {minix_stack_params(), minix_stack_fill()} and using them
in execve(), rs and vm.
* Changed load offset of rtld (ld.so) to:
execi.args.stack_high - execi.args.stack_size - 0xa00000
which is 10MB below the main executable stack.
Change-Id: I839daf3de43321cded44105634102d419cb36cec
Created a new directory called bsp (board support package) to hold
board or system on chip specific code. The idea is the following.
Change-Id: Ica5886806940facae2fa5492fcc938b3c2b989be
During startup machine.board_id is now determined. The kernel can now
at runtime determine how to configure itself and does so.
Change-Id: I4f615af9bfa5add219e618b911a51af127591d6a
On startup determine the board_id based on the board name
passed from u-boot. This code also export "board" for use
by userland using sysenv.
Change-Id: I1064a49497c82b06f50d98650132bc0a7f543568
Put the boot arguments in uEnv.txt and not in cmdline.txt to allow
a more dynamic configuration of the system. We now also pass the
u-boot board_name parameter to the kernel.
Export the board variable to userland using sysenv. This
allows rc-scrips to perform device specific initialisation.
The board variable follows the following pattern
[ARCH]-[ARCHVARIANT]-[VENDOR]-[BOARD]-[BOARDVARIANT]
We currently we support the following boards:
X86-I586-GENERIC-GENERIC-GENERIC
ARM-ARMV7-TI-BBXM-GENERIC
ARM-ARMV7-TI-BB-WHITE
ARM-ARMV7-TI-BB-BLACK
Change-Id: I9e5f5f24f9a71cc9797cacb1aafb19499613f0be
Before this change overflowing the free running clock counter
between the time the timer was read and the time the overflow
check was done resulted in read_tsc_64 returning a to high value.
Change-Id: I1022f271213647f720477c4121d45f0c965456c6
When copying data from cacheable memory also use cacheable
attributes when creating temporary mappings.
Change-Id: I0e8380293fb4edaafba49f6262983ad86a5350c5
* Allow to change the timer frequency using the hz paramter.
* Unmask the interrupt only after registering the handler.
* Pass the hz parameter in the command line.
padconf is specific to arm, so it's being moved to kernel/arch/earm.
Add a test case to ensure the proper error is returned on non-ARM
systems.
Change-Id: I07ebbe64825d59bc0ef9c818d3d54891dafb4419
On the AM335X, writes to the padconf registers must be done in privileged
mode. To allow userspace drivers to dynamically change the padconf at
runtime, a kernel call has been added.
Change-Id: I4b25d2879399b1785a360912faa0e90b5c258533
To map kernel we use 1M sections therefore we should use
ARM_VM_SECTION_MASK to determine base address.
Change-Id: I0b97fe459f2325d702aad9b7b1e8e066d9721b87
. Replace 64bit funcions with operators in arch_clock.c
. Replace 64bit funcions with operators in proc.c
. Replace 64bit funcions with operators in vbox.c
. Replace 64bit funcions with operators in driver.c
. Eradicates is_zero64, make_zero64, neg64
Change-Id: Ie4e1242a73534f114725271b2e2365b2004cb7b9
AM335X SoCs support power-off via a power management
chip (PMIC). An alarm in the real time clock is used
to trigger the PMIC to cut the power.
To ensure the alarm goes off when the system is in
a safe state, the RTC is frozen when the alarm is
set. At the last moment, the kernel unfreezes the RTC
to let the alarm go off.
This patch adds a mini driver for unfreezing the RTC
as well as code to handle RBT_POWEROFF on Minix/arm.
Change-Id: I7d48e75791e3a81bdd2f7704997193a269409fe8
The padconf library runs in user mode, but to actually affect the
padconf register contents, the processor has to be in privileged
mode. A full server based solution will be developed, but for now
just set the pinmux in the kernel at boot.
Change-Id: I170ed54dae64b27cd9bd8807445231598fb8e3e1
kernel:
. modules can be as big as the space (8MB) between them
instead of 4MB; memory is slightly bigger with DBG=-g
arm ucontext:
. r4 is clobbered by the restore function, as it's
used as a scratch register, causing problems for the
DBG=-g build
. r1-r3 are safe for scratch registers, as they are
caller-save, so use r3 instead; and don't bother
restoring r1-r3, but preserve r4
vfs:
. improve TLL pointer sanity check a bit
Change-Id: I0e3cfc367fdc14477e40d04b5e044f288ca4cc7d
. set 'done' once initialized so 32-bit read frc works,
thanks to keesj
. make sure the software-implemented upper 32 bit of the 64-bit
"tsc" value works OK by adding an assert in one of its calls
Change-Id: I5ce24fea919f4610c6a86ac7ec9f04b1815620c2
