intMAN
version 0.2_20130422
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c_prio.vhd
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-------------------------------------------------------
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--! @file
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--! @brief Priority-condition check
for
the intMAN hardware
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--! @author Josef Strnadel, Brno University
of
Technology, Faculty
of
Information Technology
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--! @email strnadel@fit.vutbr.cz
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--! @date 2013-04-17
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library
IEEE
;
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use
IEEE.STD_LOGIC_1164.
ALL
;
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use
IEEE.NUMERIC_STD.
ALL
;
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use
work.
intMAN_package
.
all
;
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--
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--
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--
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--!
Entity
of
the priority-condition check unit
for
the intMAN hardware (interface)
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--
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entity
c_prio
is
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port
(
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monpri
:
in
STD_LOGIC_VECTOR
(
t_pri_width_range
)
;
--! priority
of
the running task (being monitored)
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hstipri
:
in
STD_LOGIC_VECTOR
(
t_pri_width_range
)
;
--! the highest pending-interrupt priority
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valid
:
out
STD_LOGIC
--! priority-condition result
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)
;
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end
entity
c_prio
;
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--
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--
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--
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--!
Architecture
of
the priority-condition check unit
for
the intMAN hardware (inner structure)
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--
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architecture
arch
of
c_prio
is
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begin
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--! Priority-condition check
process
being sensitive
to
the change
of
pending interrupt
and
monitored task priorities
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process
(
monpri
,
hstipri
)
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begin
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if
(
hstipri
<
monpri
)
then
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valid
<=
'
1
'
;
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else
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valid
<=
'
0
'
;
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end
if
;
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end
process
;
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end
architecture
arch
;
© 2013 Josef Strnadel (
email
,
web
), Faculty of Information Technology, Brno University of Technology (
web
)