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Signed-off-by: Ian Moffett <ian@osmora.org>
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Ensure no uninitialized garbage ends up in the handler structure after
we've allocated it.
Signed-off-by: Ian Moffett <ian@osmora.org>
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This commit makes the interrupt table global so it can be accessed
through assembly.
Signed-off-by: Ian Moffett <ian@osmora.org>
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This commit reserves the first 64 vectors for the I/O APIC input lines.
During an IRQ, each handler will be called to see which one handles it.
Signed-off-by: Ian Moffett <ian@osmora.org>
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This commit introduces the interrupt registration framework for L5 and
accounts for I/O APIC IRQ inputs, and interrupt priority levels encoded
within bits 7:4 of the interrupt vector
Signed-off-by: Ian Moffett <ian@osmora.org>
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Introduce a helper function to convert legacy ISA IRQ numbers to the GSI
numbers assigned to an I/O APIC pin
Signed-off-by: Ian Moffett <ian@osmora.org>
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The redirection entry count within the IOAPICVER register is zero-based,
therefore one must be added to make it absolute.
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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This commit improves the scalability of ioapic_read_madt() while
retaining as much simplicity as possible.
- Add callback argument
- Add optional argument to callback
ioapic_read_madt() now returns the value given back by a callback.
Signed-off-by: Ian Moffett <ian@osmora.org>
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This commit introduces the initial I/O APIC driver code that does basic
initialization i.e., grabbing base address from MADT, masking each pin,
etc.
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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