54 PCIE-5565PIORC Reflective Memory Board
3.3.6 Local Interrupt Control Registers
The
RFM
‐
5565
contains
a
number
of
sources
for
the
interrupt.
The
second
tier
of
interrupts
is
controlled
by
two
registers
called
the
LISR
as
shown
in
and
the
LIER
shown
in
All
Local
Interrupts
are
logically
“ORed”
together
into
the
single
interrupt
called
the
LINTi#.
The
LINTi#
line
is,
in
turn,
controlled
by
Bit
11
of
the
Local
Configuration
register
(INTCSR
at
offset
$68
to
Base
address
0).
The
control
and
status
of
local
interrupts
are
implemented
in
the
two
local
registers
(LISR
and
LIER).
The
bit
functions
of
these
two
registers
mirror
each
other.
Local Interrupt Status Register
Local
Interrupt
Status
Register
(LISR)
BAR2
(Offset
$10):
This
is
a
32
‐
bit
register
containing
a
group
of
interrupt
status
flags.
The
LIER
contains
a
corresponding
group
of
enables.
Before
any
local
interrupt
can
cause
an
interrupt
on
the
LINTi#
line,
the
Status
Bit,
its
Enable
and
the
Global
Enable
must
be
asserted.
Local
Interrupt
Control
Register
Bit
Definitions
Bits
31
through
16:
Reserved
‐
These
bits
are
reserved.
Bit
15
:
Auto
Clear
Flag
–
This
bit
is
a
read
‐
only
status
indicator
of
the
corresponding
bit
in
the
LIER
Register.
When
this
bit
is
high
(1),
the
Global
Interrupt
Enable
(Bit
14)
will
automatically
be
cleared
as
this
register
(LISR)
is
being
read.
Clearing
the
Global
Interrupt
Enable
de
‐
asserts
the
LINTi#
and,
in
turn,
releases
the
PCI
Interrupt.
Bit
14:
Global
Interrupt
Enable
–
This
bit
must
be
set
high
(1)
in
addition
to
any
interrupt
flag
and
its
associated
enable
bit
in
the
LIER
before
the
LINTi#
line
is
asserted
and
a
PCI
interrupt
can
result.
If
the
Auto
Clear
enable
bit
in
the
LIER
is
Table 3-53 Local Interrupt Status Register
LISR: BAR2 Offset $10
Bit 31
Bit 30
Bit 29
Bit 28
Bit 27
Bit 26
Bit 25
Bit 24
Reserved
Bit 23
Bit 22
Bit 21
Bit 20
Bit 19
Bit 18
Bit 17
Bit 16
Reserved
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 09
Bit 08
Auto Clear
Flag
Global
Interrupt
Enable
Local
Memory
Parity Error
Memory
Write
Inhibit
Latched Sync
Loss
RX FIFO Full RX FIFO
Almost Full
Bad Data
Bit 07
Bit 06
Bit 05
Bit 04
Bit 03
Bit 02
Bit 01
Bit 00
Pending
Net. Int. 4
Rogue Packet
Fault
TX FIFO Full Reserved
Reset Node
Request
Pending
Net. Int. 3
Pending
Net. Int. 2
Pending
Net. Int. 1