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Clean up everything in the i386 arch directory. This code has been in
dire need of refactoring for a long while. All the inline assembly
functions and the data structures related to the architecture should be
placed into their own header file. Now the scheduler can access
registers and ISRs without having to deal with arch-specific code.
Signed-off-by: Danny Holman <dholman@gymli.org>
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Move all the functions that control IRQ lines to the PIC driver. This
allows the IDT controller to handle only raw interrupts no matter where
they come from.
Signed-off-by: Danny Holman <dholman@gymli.org>
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Make the register_irq_function accessible from files including pic.h.
Signed-off-by: Danny Holman <dholman@gymli.org>
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Make all variables with char or char* type into uint8_t. This makes the
system more consistent and issues fewer compiler warnings.
Signed-off-by: Danny Holman <dholman@gymli.org>
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Make the inline assembly calls consistent across different i386 files.
Signed-off-by: Danny Holman <dholman@gymli.org>
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Add functions that let the OS read the internal state registers of the
8259 PIC.
Signed-off-by: Danny Holman <dholman@gymli.xyz>
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Add support for the 8259 programmable interrupt controller.
Signed-off-by: Danny Holman <dholman@gymli.xyz>
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