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This is easily identifiable by anyone who uses Duration::now_monotonic,
and any downstream users of that data.
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"Wherever applicable" = most places, actually :^), especially for
networking and filesystem timestamps.
This includes changes to unzip, which uses DOSPackedTime, since that is
changed for the FAT file systems.
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That's what this class really is; in fact that's what the first line of
the comment says it is.
This commit does not rename the main files, since those will contain
other time-related classes in a little bit.
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is_sharing_with_others API was never really put to use properly since
it was introduced. The only place where it is used in Interrupts.cpp is
in conjuction with is_shared_handler() which is only true for
SharedIRQHandler and is_sharing_with_others will always return false.
Remove that API.
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For now just return 0 as we have no RTC support on aarch64 yet, and add
a FIXME to return the correct value.
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Support all the available clocks in clock_getres(). Also, fix this
function to use the actual ticks per second value, not the constant
`_SC_CLK_TCK` (which is always equal to 8) and move the resolution
computation logic to TimeManagement.
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No functional change.
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Before this change, we were truncating the nanosecond part of file
timestamps in many different places.
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This sets up the RPi::Timer to trigger an interurpt every 4ms using one
of the comparators. The actual time is calculated by looking at the main
counter of the RPi::Timer using the Timer::update_time function.
A stub for Scheduler::timer_tick is also added, since the TimeManagement
code now calls the function.
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This makes the RPi::Timer suitable for use in the TimeManagement code.
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The code in this file is not architecture specific, so it can be moved
to the base Kernel directory.
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The APICTimer, HPET and RTC (the RTC timer is in the context of the PC
RTC here) are timers that exist only in x86 platforms, therefore, we
move the handling code and the initialization code to the Arch/x86/Time
directory. Other related code patterns in the TimeManagement singleton
and in the Random.cpp file are guarded with #ifdef to ensure they are
only compiled for x86 builds.
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The PIC and APIC code are specific to x86 platforms, so move them out of
the general Interrupts directory to Arch/x86/common/Interrupts directory
instead.
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The RTC and CMOS are currently only supported for x86 platforms and use
specific x86 instructions to produce only certain x86 plaform operations
and results, therefore, we move them to the Arch/x86 specific directory.
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Until now, our kernel has reimplemented a number of AK classes to
provide automatic internal locking:
- RefPtr
- NonnullRefPtr
- WeakPtr
- Weakable
This patch renames the Kernel classes so that they can coexist with
the original AK classes:
- RefPtr => LockRefPtr
- NonnullRefPtr => NonnullLockRefPtr
- WeakPtr => LockWeakPtr
- Weakable => LockWeakable
The goal here is to eventually get rid of the Lock* classes in favor of
using external locking.
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Instead of having two separate implementations of AK::RefCounted, one
for userspace and one for kernelspace, there is now RefCounted and
AtomicRefCounted.
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While null StringViews are just as bad, these prevent the removal of
StringView(char const*) as that constructor accepts a nullptr.
No functional changes.
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Each of these strings would previously rely on StringView's char const*
constructor overload, which would call __builtin_strlen on the string.
Since we now have operator ""sv, we can replace these with much simpler
versions. This opens the door to being able to remove
StringView(char const*).
No functional changes.
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These 2 classes currently contain much code that is x86(_64) specific.
Move them to the architecture specific directory. This also allows for a
simpler implementation for aarch64.
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Now that the code does not use architectural specific code, it is moved
to the generic Arch directory and the paths are modified accordingly.
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This is for the upcoming change to make InterruptDisabler class work for
the aarch64 build.
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Gets rid of a bit of code duplication, and makes the API more consistent
with the style we are moving towards.
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We were unconditionally trying to update it in the interrupt, which
would depend on the timer interrupt not being received too soon after
the timers are initialized (before the time page was initialized),
which was the case when using HPET timers via the ACPI tables, but not
when using the PIT when ACPI was disabled.
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This mostly just moved the problem, as a lot of the callers are not
capable of propagating the errors themselves, but it's a step in the
right direction.
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This was a premature optimization from the early days of SerenityOS.
The eternal heap was a simple bump pointer allocator over a static
byte array. My original idea was to avoid heap fragmentation and improve
data locality, but both ideas were rooted in cargo culting, not data.
We would reserve 4 MiB at boot and only ended up using ~256 KiB, wasting
the rest.
This patch replaces all kmalloc_eternal() usage by regular kmalloc().
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Currently the APIC class is constructed irrespective of whether it
is used or not.
So, move APIC initialization from init to the InterruptManagement
class and construct the APIC class only when it is needed.
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This makes searching for not yet OOM safe interfaces a bit easier.
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We don't have to worry about racy 32-bit reads when we're reading the
64-bit HPET value using a 64-bit CPU. :^)
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We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace!
This was a slightly tedious refactoring that took a long time, so it's
not unlikely that some bugs crept in.
Nevertheless, it does pass basic functionality testing, and it's just
real nice to finally see the same pattern in all contexts. :^)
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This allows clients to check whether TimeManagement is available before
trying to ask it about time related things.
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A new RegisterState header includes the platform specific RegisterState
header based on the platform being compiled.
The Aarch64 RegisterState header contains stubs for Debug
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Previously there was a mix of returning plain strings and returning
explicit string views using `operator ""sv`. This change switches them
all to standardized on `operator ""sv` as it avoids a call to strlen.
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This will somwhat help unify them also under the same SysFS directory in
the commit.
Also, it feels much more like this change reflects the reality that both
ACPI and the BIOS are part of the firmware on x86 computers.
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This is a better pattern than returning a PhysicalAddress with a zero
value, so the code is more understandable now.
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