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Add support for managing the page table entry dirty bit. This will allow
vm(9) to know when to page-out data to backing store, among other
things.
Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Add SPAWN_WAIT flag that causes spawn() to wait until the child process
completes.
Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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- Add DRIVER_DEFER() macro to schedule initialization
for lower priority drivers
- Expose `proc0' to the rest of the kernel
Signed-off-by: Ian Moffett <ian@osmora.org>
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- Add USER_KMSG option to configure if kernel messages
should be logged in user contexts
- Add syslog_silence() to silence kernel messages in user
contexts if USER_KMSG is "yes"
Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Adds initial sys/disklabel.h header which describes the ODT (OSMORA Disk
Table)
Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Add bsize() callback within the bdevsw structure. This returns the
number of blocks a block device supports at maximum. This result is *not*
in bytes.
Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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This commit also adds the S_IFBLK flag in sys/stat.h
Signed-off-by: Ian Moffett <ian@osmora.org>
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* Modified draw loops to use `fbdev_get_index()` less often.
* Created `cons_fast_putch()`, then used it to implement `cons_putch()`
and `cons_putstr()`. This way, when printing an entire string, the
lock acquire/release and cursor hide/show will only happen once,
instead of once per character.
* Modified `syslog_write()` to use `cons_putstr()`.
Signed-off-by: Quinn Stephens <quinn@osmora.org>
Signed-off-by: Ian Moffett <ian@osmora.org>
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Optimize reading of logical blocks within SATA drives by giving each
device descriptor a drive cache descriptor ring.
Signed-off-by: Ian Moffett <ian@osmora.org>
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* Switched to using macros for the GDT entry bits, to improve clarity
and make the code easier to modify. Also got rid of some junk values
in a few of the entries.
* Shrunk the GDT data array from 256 entries to 7 (GDT_ENTRY_COUNT)
since the GDT will only ever use 7 of the entries for now.
* Aligned the GDT using __cacheline_aligned, because the GDT entries
will be read every time a segment selector is loaded.
* Modified code dealing with the GDTR to just use `g_gdtr`, since the
same GDT/GDTR is always used.
* In `gdt_load()`, changed `eax` -> `ax`, since segment registers are
only 16 bits. Also replaced the `gdtr` to just use `g_gdtr`.
Additionally, used the inline assembly formatting to supply segment
selectors with KERNEL_CS/DS macros.
Signed-off-by: Quinn Stephens <quinn@osmora.org>
Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Replace intr_alloc_vector() with a cleaner and more machine independent
intr_register()
Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Introduce function for calling ACPI \\_S<n> objects via uACPI
Signed-off-by: Ian Moffett <ian@osmora.org>
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Simplify and improve context switch logic, also stops the LAPIC from
being spammed with register accesses. This also updates the default
quantum to 9000 us to avoid cache thrashing and all kinds of other nasty
things.
Signed-off-by: Ian Moffett <ian@osmora.org>
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See https://github.com/uACPI/uACPI/
Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Ensure interrupts are disabled at the start of panic()
to prevent any interrupts from further degrading the
state of the system. Also adds a newline before "panic: "
to clean up the logs.
Signed-off-by: Ian Moffett <ian@osmora.org>
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This commit introduces a more complete spawn implementation as well as
the SYS_spawn syscall and a libc interface.
Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Simplicity is divine, fork() may be powerful but is no longer simple. It
became a thing in the late 70s during the early days of UNIX when computing
was simple, when CPUs were only 16-bits, MMUs were not prevalent and RAM was
only 512 KB. However it isn't 1971 anymore, process management, CPUs and memory
architecture has advanced significantly since. This commit ceases work on the
fork() syscall as implementing it would only introduce unnecessary complexity,
security issues, hefty processing overhead and would perpetuate what should
now be considered legacy. The current best alternative would be providing
a form of process spawning as well as a mechanism to wait for the child
process to complete.
Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Add TF_IP() to extract the instruction pointer from a trapframe between
architectures.
Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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Signed-off-by: Ian Moffett <ian@osmora.org>
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