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authorJoel Sherrill <joel.sherrill@OARcorp.com>2002-07-31 00:17:12 +0000
committerJoel Sherrill <joel.sherrill@OARcorp.com>2002-07-31 00:17:12 +0000
commit0b93b9785601ef8da6b7ae501c55033230d6589c (patch)
tree775300aba4f973e9b6d844c49487f13c99d0ca65 /doc/supplements/mips64orion
parent52c5689ecd46a4601aea1104c1c860f8ca48ec05 (diff)
downloadrtems-0b93b9785601ef8da6b7ae501c55033230d6589c.tar.bz2
2002-07-30 Joel Sherrill <joel@OARcorp.com>
* intr_NOTIMES.t, timeBSP.t: Replaced XXX's with real info.
Diffstat (limited to 'doc/supplements/mips64orion')
-rw-r--r--doc/supplements/mips64orion/ChangeLog4
-rw-r--r--doc/supplements/mips64orion/intr_NOTIMES.t4
-rw-r--r--doc/supplements/mips64orion/timeBSP.t14
3 files changed, 15 insertions, 7 deletions
diff --git a/doc/supplements/mips64orion/ChangeLog b/doc/supplements/mips64orion/ChangeLog
index e869715868..43f3af133f 100644
--- a/doc/supplements/mips64orion/ChangeLog
+++ b/doc/supplements/mips64orion/ChangeLog
@@ -1,3 +1,7 @@
+2002-07-30 Joel Sherrill <joel@OARcorp.com>
+
+ * intr_NOTIMES.t, timeBSP.t: Replaced XXX's with real info.
+
2002-03-27 Ralf Corsepius <corsepiu@faw.uni-ulm.de>
* Makefile.am: Remove AUTOMAKE_OPTIONS.
diff --git a/doc/supplements/mips64orion/intr_NOTIMES.t b/doc/supplements/mips64orion/intr_NOTIMES.t
index 04e4dff717..fd4ca3aa9c 100644
--- a/doc/supplements/mips64orion/intr_NOTIMES.t
+++ b/doc/supplements/mips64orion/intr_NOTIMES.t
@@ -167,7 +167,7 @@ the execution of this section and restores them to the previous
level upon completion of the section. RTEMS has been optimized
to insure that interrupts are disabled for less than
RTEMS_MAXIMUM_DISABLE_PERIOD microseconds on a
-RTEMS_MAXIMUM_DISABLE_PERIOD_MHZ Mhz XXX with
+RTEMS_MAXIMUM_DISABLE_PERIOD_MHZ Mhz processor with
zero wait states. These numbers will vary based the
number of wait states and processor speed present on the target board.
[NOTE: The maximum period with interrupts disabled is hand calculated. This
@@ -189,7 +189,7 @@ interrupt stack is determined by the interrupt_stack_size field
in the CPU Configuration Table. During the initialization
process, RTEMS will install its interrupt stack.
-The XXX port of RTEMS supports a software managed
+The mips64orion port of RTEMS supports a software managed
dedicated interrupt stack on those CPU models which do not
support a separate interrupt stack in hardware.
diff --git a/doc/supplements/mips64orion/timeBSP.t b/doc/supplements/mips64orion/timeBSP.t
index 63877b8de3..efce892858 100644
--- a/doc/supplements/mips64orion/timeBSP.t
+++ b/doc/supplements/mips64orion/timeBSP.t
@@ -27,7 +27,8 @@ times as they pertain to the XXX version of RTEMS.
All times reported except for the maximum period
interrupts are disabled by RTEMS were measured using a Motorola
-BSP_FOR_TIMES CPU board. The BSP_FOR_TIMES is a 20Mhz board with one wait
+BSP_FOR_TIMES CPU board. The BSP_FOR_TIMES is a RTEMS_MAXIMUM_DISABLE_PERIOD_MHZ
+Mhz board with one wait
state dynamic memory and a XXX numeric coprocessor. The
Zilog 8036 countdown timer on this board was used to measure
elapsed time with a one-half microsecond resolution. All
@@ -41,7 +42,8 @@ disabled. The worst case times of the XXX microprocessor
were used for each instruction. Zero wait state memory was
assumed. The total CPU cycles executed with interrupts
disabled, including the instructions to disable and enable
-interrupts, was divided by 20 to simulate a 20Mhz XXX. It
+interrupts, was divided by 20 to simulate a RTEMS_MAXIMUM_DISABLE_PERIOD_MHZ
+Mhz processor. It
should be noted that the worst case instruction times for the
XXX assume that the internal cache is disabled and that no
instructions overlap.
@@ -52,20 +54,22 @@ The maximum period with interrupts disabled within
RTEMS is less than RTEMS_MAXIMUM_DISABLE_PERIOD
microseconds including the instructions
which disable and re-enable interrupts. The time required for
-the XXX to vector an interrupt and for the RTEMS entry
+the mips64orion to vector an interrupt and for the RTEMS entry
overhead before invoking the user's interrupt handler are a
total of RTEMS_INTR_ENTRY_RETURNS_TO_PREEMPTING_TASK
microseconds. These combine to yield a worst case
interrupt latency of less than
RTEMS_MAXIMUM_DISABLE_PERIOD + RTEMS_INTR_ENTRY_RETURNS_TO_PREEMPTING_TASK
-microseconds at 20Mhz. [NOTE: The maximum period with interrupts
+microseconds at RTEMS_MAXIMUM_DISABLE_PERIOD_MHZ
+Mhz. [NOTE: The maximum period with interrupts
disabled was last determined for Release
RTEMS_RELEASE_FOR_MAXIMUM_DISABLE_PERIOD.]
It should be noted again that the maximum period with
interrupts disabled within RTEMS is hand-timed and based upon
worst case (i.e. CPU cache disabled and no instruction overlap)
-times for a 20Mhz XXX. The interrupt vector and entry
+times for a RTEMS_MAXIMUM_DISABLE_PERIOD_MHZ
+Mhz processor. The interrupt vector and entry
overhead time was generated on an BSP_FOR_TIMES benchmark platform
using the Multiprocessing Communications registers to generate
as the interrupt source.