Commit Graph

4 Commits (29a0af618ddd21f55df5753c3e16b0625f534b3c)

Author SHA1 Message Date
Peter Maydell f81804a52b hw/core/or-irq: Support more than 16 inputs to an OR gate
For the IoTKit MPC support, we need to wire together the
interrupt outputs of 17 MPCs; this exceeds the current
value of MAX_OR_LINES. Increase MAX_OR_LINES to 32 (which
should be enough for anyone).

The tricky part is retaining the migration compatibility for
existing OR gates; we add a subsection which is only used
for larger OR gates, and define it such that we can freely
increase MAX_OR_LINES in future (or even move to a dynamically
allocated levels[] array without an upper size limit) without
breaking compatibility.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20180604152941.20374-10-peter.maydell@linaro.org
2018-06-15 15:23:34 +01:00
Peter Maydell 439f122f76 include/hw/or-irq.h: Add missing include guard
The or-irq.h header file is missing the customary guard against
multiple inclusion, which means compilation fails if it gets
included twice. Fix the omission.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180220180325.29818-11-peter.maydell@linaro.org
2018-03-02 11:03:45 +00:00
Peter Maydell 69fa4f9568 include/hw/or-irq.h: Drop unused in_irqs field
The struct OrIRQState has an unused member field in_irqs.
This is a legacy of earlier versions of the patch; the
code that used it was dropped from the final version of
the code that went into master, but we forgot to delete
the no-longer-used struct field. Do so now.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2017-10-16 21:09:15 +03:00
Alistair Francis 1b25567765 irq: Add a new irq device that allows the ORing of lines
Signed-off-by: Alistair Francis <alistair@alistair23.me>
Message-id: 52e5d361e3b5a0ea8554aca73ee65ae2b586112e.1474742262.git.alistair@alistair23.me
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-10-04 13:28:07 +01:00