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new 8fc79fe49 Publishing web: 6f43cfb03f4b427e9277e6d3064476fa7ea61660
docs: 110ab50f50c8c7f1dc704dee01400eac7994a46b
8fc79fe49 is described below
commit 8fc79fe494e0088212f492ce35dd1dd5700d25c9
Author: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
AuthorDate: Thu Oct 10 00:24:21 2024 +0000
Publishing web: 6f43cfb03f4b427e9277e6d3064476fa7ea61660 docs:
110ab50f50c8c7f1dc704dee01400eac7994a46b
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index cfe249367..4d1ddbf0e 100644
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for functionality that is not appropriate for deeply-embedded environments
(such
as fork()).</p>
-<p>Last Updated: 09 October 24 at 00:16</p>
+<p>Last Updated: 10 October 24 at 00:16</p>
<div class="toctree-wrapper compound">
<p class="caption" role="heading"><span class="caption-text">Table of
Contents</span></p>
<ul class="current">
diff --git a/content/docs/12.4.0/searchindex.js
b/content/docs/12.4.0/searchindex.js
index ea03f6a17..941875b9f 100644
--- a/content/docs/12.4.0/searchindex.js
+++ b/content/docs/12.4.0/searchindex.js
@@ -1 +1 @@
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"applications/benchmarks/coremark/index", "applications/benchmarks/index",
"applications/boot/index", "applications/boot/mcuboot/index",
"applications/boot/miniboot/index", "applications/canutils/candump/index",
"applications/canutils/canlib/index", "applications/canutils/cansend/index",
"applications/c [...]
\ No newline at end of file
+Search.setIndex({"docnames": ["applications/audioutils/fmsynt/index",
"applications/audioutils/index", "applications/audioutils/mml_parser/index",
"applications/audioutils/nxaudio/index",
"applications/benchmarks/coremark/index", "applications/benchmarks/index",
"applications/boot/index", "applications/boot/mcuboot/index",
"applications/boot/miniboot/index", "applications/canutils/candump/index",
"applications/canutils/canlib/index", "applications/canutils/cansend/index",
"applications/c [...]
\ No newline at end of file
diff --git a/content/docs/12.5.0/index.html b/content/docs/12.5.0/index.html
index d35ffa88c..20013f02c 100644
--- a/content/docs/12.5.0/index.html
+++ b/content/docs/12.5.0/index.html
@@ -171,7 +171,7 @@ standards. Additional standard APIs from Unix and other
common RTOS’s (such as
VxWorks) are adopted for functionality not available under these standards, or
for functionality that is not appropriate for deeply-embedded environments
(such
as fork()).</p>
-<p>Last Updated: 09 October 24 at 00:18</p>
+<p>Last Updated: 10 October 24 at 00:18</p>
<div class="toctree-wrapper compound">
<p class="caption" role="heading"><span class="caption-text">Table of
Contents</span></p>
<ul class="current">
diff --git a/content/docs/12.5.0/searchindex.js
b/content/docs/12.5.0/searchindex.js
index 8aadaaa3a..a6026716b 100644
--- a/content/docs/12.5.0/searchindex.js
+++ b/content/docs/12.5.0/searchindex.js
@@ -1 +1 @@
-Search.setIndex({"docnames": ["applications/audioutils/fmsynt/index",
"applications/audioutils/index", "applications/audioutils/mml_parser/index",
"applications/audioutils/nxaudio/index",
"applications/benchmarks/coremark/index", "applications/benchmarks/index",
"applications/boot/index", "applications/boot/mcuboot/index",
"applications/boot/miniboot/index", "applications/canutils/candump/index",
"applications/canutils/canlib/index", "applications/canutils/cansend/index",
"applications/c [...]
\ No newline at end of file
+Search.setIndex({"docnames": ["applications/audioutils/fmsynt/index",
"applications/audioutils/index", "applications/audioutils/mml_parser/index",
"applications/audioutils/nxaudio/index",
"applications/benchmarks/coremark/index", "applications/benchmarks/index",
"applications/boot/index", "applications/boot/mcuboot/index",
"applications/boot/miniboot/index", "applications/canutils/candump/index",
"applications/canutils/canlib/index", "applications/canutils/cansend/index",
"applications/c [...]
\ No newline at end of file
diff --git a/content/docs/12.5.1/index.html b/content/docs/12.5.1/index.html
index 193534e6d..f1c78d979 100644
--- a/content/docs/12.5.1/index.html
+++ b/content/docs/12.5.1/index.html
@@ -171,7 +171,7 @@ standards. Additional standard APIs from Unix and other
common RTOS’s (such as
VxWorks) are adopted for functionality not available under these standards, or
for functionality that is not appropriate for deeply-embedded environments
(such
as fork()).</p>
-<p>Last Updated: 09 October 24 at 00:19</p>
+<p>Last Updated: 10 October 24 at 00:19</p>
<div class="toctree-wrapper compound">
<p class="caption" role="heading"><span class="caption-text">Table of
Contents</span></p>
<ul class="current">
diff --git a/content/docs/12.5.1/searchindex.js
b/content/docs/12.5.1/searchindex.js
index 89d34344c..71d9a5113 100644
--- a/content/docs/12.5.1/searchindex.js
+++ b/content/docs/12.5.1/searchindex.js
@@ -1 +1 @@
-Search.setIndex({"docnames": ["applications/audioutils/fmsynt/index",
"applications/audioutils/index", "applications/audioutils/mml_parser/index",
"applications/audioutils/nxaudio/index",
"applications/benchmarks/coremark/index", "applications/benchmarks/index",
"applications/boot/index", "applications/boot/mcuboot/index",
"applications/boot/miniboot/index", "applications/canutils/candump/index",
"applications/canutils/canlib/index", "applications/canutils/cansend/index",
"applications/c [...]
\ No newline at end of file
+Search.setIndex({"docnames": ["applications/audioutils/fmsynt/index",
"applications/audioutils/index", "applications/audioutils/mml_parser/index",
"applications/audioutils/nxaudio/index",
"applications/benchmarks/coremark/index", "applications/benchmarks/index",
"applications/boot/index", "applications/boot/mcuboot/index",
"applications/boot/miniboot/index", "applications/canutils/candump/index",
"applications/canutils/canlib/index", "applications/canutils/cansend/index",
"applications/c [...]
\ No newline at end of file
diff --git a/content/docs/12.6.0/index.html b/content/docs/12.6.0/index.html
index 717919b75..cbcd9debe 100644
--- a/content/docs/12.6.0/index.html
+++ b/content/docs/12.6.0/index.html
@@ -172,7 +172,7 @@ standards. Additional standard APIs from Unix and other
common RTOS’s (such as
VxWorks) are adopted for functionality not available under these standards, or
for functionality that is not appropriate for deeply-embedded environments
(such
as fork()).</p>
-<p>Last Updated: 09 October 24 at 00:21</p>
+<p>Last Updated: 10 October 24 at 00:20</p>
<div class="toctree-wrapper compound">
<p class="caption" role="heading"><span class="caption-text">Table of
Contents</span></p>
<ul class="current">
diff --git a/content/docs/12.6.0/searchindex.js
b/content/docs/12.6.0/searchindex.js
index 103f0f261..9821ff58f 100644
--- a/content/docs/12.6.0/searchindex.js
+++ b/content/docs/12.6.0/searchindex.js
@@ -1 +1 @@
-Search.setIndex({"docnames": ["applications/audioutils/fmsynt/index",
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"applications/audioutils/nxaudio/index",
"applications/benchmarks/cachespeed/index",
"applications/benchmarks/coremark-pro/index",
"applications/benchmarks/coremark/index",
"applications/benchmarks/dhrystone/index", "applications/benchmarks/fio/index",
"applications/benchmarks/index", "applications/benchmarks/iozone/index",
"applications/bench [...]
\ No newline at end of file
+Search.setIndex({"docnames": ["applications/audioutils/fmsynt/index",
"applications/audioutils/index", "applications/audioutils/mml_parser/index",
"applications/audioutils/nxaudio/index",
"applications/benchmarks/cachespeed/index",
"applications/benchmarks/coremark-pro/index",
"applications/benchmarks/coremark/index",
"applications/benchmarks/dhrystone/index", "applications/benchmarks/fio/index",
"applications/benchmarks/index", "applications/benchmarks/iozone/index",
"applications/bench [...]
\ No newline at end of file
diff --git a/content/docs/latest/_sources/guides/zerolatencyinterrupts.rst.txt
b/content/docs/latest/_sources/guides/zerolatencyinterrupts.rst.txt
index c44a0ce23..bd0781f75 100644
--- a/content/docs/latest/_sources/guides/zerolatencyinterrupts.rst.txt
+++ b/content/docs/latest/_sources/guides/zerolatencyinterrupts.rst.txt
@@ -1,6 +1,6 @@
-=========================================
-High Performance, Zero Latency Interrupts
-=========================================
+=====================================================================
+High Performance: Zero Latency Interrupts, Maskable nested interrupts
+=====================================================================
Generic Interrupt Handling
==========================
@@ -111,6 +111,62 @@ between the high priority interrupt handler and *PendSV*
interrupt
handler. A detailed discussion of that custom logic is beyond the
scope of this Wiki page.
+The following table shows the priority levels of the Cortex-M family:
+
+.. code-block::
+
+ IRQ type Priority
+ Dataabort 0x00
+ High prio IRQ1 0x20 (Zero-latency interrupt)
+ High prio IRQ2 0x30 (Can't call OS API in ISR)
+ SVC 0x70
+ Disable IRQ 0x80
+ (critical-section)
+ Low prio IRQ 0xB0
+ PendSV 0xE0
+
+As you can see, the priority levels of the zero-latency interrupts can
+beyond the critical section and SVC.
+But High prio IRQ can't call OS API.
+
+
+Maskable Nested Interrupts
+==========================
+
+The ARM Cortex-M family supports a feature called *BASEPRI* that can be
+used to disable interrupts at a priority level below a certain level.
+This feature can be used to support maskable nested interrupts.
+
+Maskable nested interrupts differ from zero-latency interrupts in
+that they obey the interrupt masking mechanisms of the system.
+For example, setting the BASEPRI register to a specific threshold will
+block all interrupts of a lower or equal priority.
+However, high-priority interrupts (such as Non-Maskable Interrupts
+or zero-latency interrupts) are unaffected by these masks.
+
+This is useful when you have a high-priority interrupt that needs to
+be able to interrupt the system, but you also have lower-priority
+interrupts that you want to be able to mask.
+
+The following table shows the priority levels of the Cortex-M family:
+
+.. code-block::
+
+ IRQ type Priority
+ Dataabort 0x00
+ SVC 0x70
+ Disable IRQ 0x80
+ (critical-section)
+ High prio IRQ1 0x90 (Maskable nested interrupt)
+ High prio IRQ2 0xA0 (Can call OS API in ISR)
+ Low prio IRQ 0xB0
+ PendSV 0xE0
+
+As you can see, the priority levels of the maskable nested interrupts
+are between the critical section and the low-priority interrupts.
+And High prio IRQ can call OS API in ISR.
+
+
Nested Interrupt Handling
=========================
diff --git a/content/docs/latest/_static/css/theme.css
b/content/docs/latest/_static/css/theme.css
index 6843d97b7..0f14f1064 100644
--- a/content/docs/latest/_static/css/theme.css
+++ b/content/docs/latest/_static/css/theme.css
@@ -1,4 +1,4 @@
html{box-sizing:border-box}*,:after,:before{box-sizing:inherit}article,aside,details,figcaption,figure,footer,header,hgroup,nav,section{display:block}audio,canvas,video{display:inline-block;*display:inline;*zoom:1}[hidden],audio:not([controls]){display:none}*{-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box}html{font-size:100%;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%}body{margin:0}a:active,a:hover{outline:0}abbr[title]{border-bottom:1px
dotted [...]
* Font Awesome 4.7.0 by @davegandy - http://fontawesome.io - @fontawesome
* License - http://fontawesome.io/license (Font: SIL OFL 1.1, CSS: MIT
License)
-
*/@font-face{font-family:FontAwesome;src:url(fonts/fontawesome-webfont.eot?674f50d287a8c48dc19ba404d20fe713);src:url(fonts/fontawesome-webfont.eot?674f50d287a8c48dc19ba404d20fe713?#iefix&v=4.7.0)
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format("woff"),url(fonts/fontawesome-webfont.ttf?b06871f281fee6b241d60582ae9369b9)
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+
*/@font-face{font-family:FontAwesome;src:url(fonts/fontawesome-webfont.eot?674f50d287a8c48dc19ba404d20fe713);src:url(fonts/fontawesome-webfont.eot?674f50d287a8c48dc19ba404d20fe713?#iefix&v=4.7.0)
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diff --git a/content/docs/latest/guides/automounter.html
b/content/docs/latest/guides/automounter.html
index 438daeee1..7d95494c9 100644
--- a/content/docs/latest/guides/automounter.html
+++ b/content/docs/latest/guides/automounter.html
@@ -136,7 +136,7 @@
<li class="toctree-l2"><a class="reference internal"
href="customboards.html">Custom Boards How-To</a></li>
<li class="toctree-l2"><a class="reference internal"
href="customapps.html">Custom Apps How-to</a></li>
<li class="toctree-l2"><a class="reference internal"
href="citests.html">Running CI Test Locally</a></li>
-<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance, Zero Latency
Interrupts</a></li>
+<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance: Zero Latency Interrupts,
Maskable nested interrupts</a></li>
<li class="toctree-l2"><a class="reference internal" href="kasan.html">The
Kernel Address Sanitizer (KASAN)</a></li>
<li class="toctree-l2"><a class="reference internal"
href="nestedinterrupts.html">Nested Interrupts</a></li>
<li class="toctree-l2"><a class="reference internal"
href="cortexmhardfaults.html">Analyzing Cortex-M Hardfaults</a></li>
diff --git a/content/docs/latest/guides/citests.html
b/content/docs/latest/guides/citests.html
index 9695e590d..489509929 100644
--- a/content/docs/latest/guides/citests.html
+++ b/content/docs/latest/guides/citests.html
@@ -43,7 +43,7 @@
<script src="../_static/js/theme.js"></script>
<link rel="index" title="Index" href="../genindex.html" />
<link rel="search" title="Search" href="../search.html" />
- <link rel="next" title="High Performance, Zero Latency Interrupts"
href="zerolatencyinterrupts.html" />
+ <link rel="next" title="High Performance: Zero Latency Interrupts,
Maskable nested interrupts" href="zerolatencyinterrupts.html" />
<link rel="prev" title="Custom Apps How-to" href="customapps.html" />
</head>
@@ -140,7 +140,7 @@
<li class="toctree-l3"><a class="reference internal"
href="#running-ci-tests">Running CI Tests</a></li>
</ul>
</li>
-<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance, Zero Latency
Interrupts</a></li>
+<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance: Zero Latency Interrupts,
Maskable nested interrupts</a></li>
<li class="toctree-l2"><a class="reference internal" href="kasan.html">The
Kernel Address Sanitizer (KASAN)</a></li>
<li class="toctree-l2"><a class="reference internal"
href="nestedinterrupts.html">Nested Interrupts</a></li>
<li class="toctree-l2"><a class="reference internal"
href="cortexmhardfaults.html">Analyzing Cortex-M Hardfaults</a></li>
@@ -255,7 +255,7 @@ a user defined directory to which tests log are saved.</p>
</div>
<footer><div class="rst-footer-buttons" role="navigation"
aria-label="Footer">
<a href="customapps.html" class="btn btn-neutral float-left"
title="Custom Apps How-to" accesskey="p" rel="prev"><span class="fa
fa-arrow-circle-left" aria-hidden="true"></span> Previous</a>
- <a href="zerolatencyinterrupts.html" class="btn btn-neutral
float-right" title="High Performance, Zero Latency Interrupts" accesskey="n"
rel="next">Next <span class="fa fa-arrow-circle-right"
aria-hidden="true"></span></a>
+ <a href="zerolatencyinterrupts.html" class="btn btn-neutral
float-right" title="High Performance: Zero Latency Interrupts, Maskable nested
interrupts" accesskey="n" rel="next">Next <span class="fa
fa-arrow-circle-right" aria-hidden="true"></span></a>
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<hr/>
diff --git a/content/docs/latest/guides/coredump.html
b/content/docs/latest/guides/coredump.html
index c80cb5d6b..42c7925aa 100644
--- a/content/docs/latest/guides/coredump.html
+++ b/content/docs/latest/guides/coredump.html
@@ -136,7 +136,7 @@
<li class="toctree-l2"><a class="reference internal"
href="customboards.html">Custom Boards How-To</a></li>
<li class="toctree-l2"><a class="reference internal"
href="customapps.html">Custom Apps How-to</a></li>
<li class="toctree-l2"><a class="reference internal"
href="citests.html">Running CI Test Locally</a></li>
-<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance, Zero Latency
Interrupts</a></li>
+<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance: Zero Latency Interrupts,
Maskable nested interrupts</a></li>
<li class="toctree-l2"><a class="reference internal" href="kasan.html">The
Kernel Address Sanitizer (KASAN)</a></li>
<li class="toctree-l2"><a class="reference internal"
href="nestedinterrupts.html">Nested Interrupts</a></li>
<li class="toctree-l2"><a class="reference internal"
href="cortexmhardfaults.html">Analyzing Cortex-M Hardfaults</a></li>
diff --git a/content/docs/latest/guides/coresight.html
b/content/docs/latest/guides/coresight.html
index e15dc18d5..42378be7a 100644
--- a/content/docs/latest/guides/coresight.html
+++ b/content/docs/latest/guides/coresight.html
@@ -136,7 +136,7 @@
<li class="toctree-l2"><a class="reference internal"
href="customboards.html">Custom Boards How-To</a></li>
<li class="toctree-l2"><a class="reference internal"
href="customapps.html">Custom Apps How-to</a></li>
<li class="toctree-l2"><a class="reference internal"
href="citests.html">Running CI Test Locally</a></li>
-<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance, Zero Latency
Interrupts</a></li>
+<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance: Zero Latency Interrupts,
Maskable nested interrupts</a></li>
<li class="toctree-l2"><a class="reference internal" href="kasan.html">The
Kernel Address Sanitizer (KASAN)</a></li>
<li class="toctree-l2"><a class="reference internal"
href="nestedinterrupts.html">Nested Interrupts</a></li>
<li class="toctree-l2"><a class="reference internal"
href="cortexmhardfaults.html">Analyzing Cortex-M Hardfaults</a></li>
diff --git a/content/docs/latest/guides/cortexmhardfaults.html
b/content/docs/latest/guides/cortexmhardfaults.html
index cf552bbd8..ecd87f20a 100644
--- a/content/docs/latest/guides/cortexmhardfaults.html
+++ b/content/docs/latest/guides/cortexmhardfaults.html
@@ -136,7 +136,7 @@
<li class="toctree-l2"><a class="reference internal"
href="customboards.html">Custom Boards How-To</a></li>
<li class="toctree-l2"><a class="reference internal"
href="customapps.html">Custom Apps How-to</a></li>
<li class="toctree-l2"><a class="reference internal"
href="citests.html">Running CI Test Locally</a></li>
-<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance, Zero Latency
Interrupts</a></li>
+<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance: Zero Latency Interrupts,
Maskable nested interrupts</a></li>
<li class="toctree-l2"><a class="reference internal" href="kasan.html">The
Kernel Address Sanitizer (KASAN)</a></li>
<li class="toctree-l2"><a class="reference internal"
href="nestedinterrupts.html">Nested Interrupts</a></li>
<li class="toctree-l2 current"><a class="current reference internal"
href="#">Analyzing Cortex-M Hardfaults</a><ul>
diff --git a/content/docs/latest/guides/cpp_cmake.html
b/content/docs/latest/guides/cpp_cmake.html
index 5e5c2ef08..e28c4db14 100644
--- a/content/docs/latest/guides/cpp_cmake.html
+++ b/content/docs/latest/guides/cpp_cmake.html
@@ -141,7 +141,7 @@
<li class="toctree-l2"><a class="reference internal"
href="customboards.html">Custom Boards How-To</a></li>
<li class="toctree-l2"><a class="reference internal"
href="customapps.html">Custom Apps How-to</a></li>
<li class="toctree-l2"><a class="reference internal"
href="citests.html">Running CI Test Locally</a></li>
-<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance, Zero Latency
Interrupts</a></li>
+<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance: Zero Latency Interrupts,
Maskable nested interrupts</a></li>
<li class="toctree-l2"><a class="reference internal" href="kasan.html">The
Kernel Address Sanitizer (KASAN)</a></li>
<li class="toctree-l2"><a class="reference internal"
href="nestedinterrupts.html">Nested Interrupts</a></li>
<li class="toctree-l2"><a class="reference internal"
href="cortexmhardfaults.html">Analyzing Cortex-M Hardfaults</a></li>
diff --git a/content/docs/latest/guides/customapps.html
b/content/docs/latest/guides/customapps.html
index eb10930c2..91394d816 100644
--- a/content/docs/latest/guides/customapps.html
+++ b/content/docs/latest/guides/customapps.html
@@ -161,7 +161,7 @@
</ul>
</li>
<li class="toctree-l2"><a class="reference internal"
href="citests.html">Running CI Test Locally</a></li>
-<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance, Zero Latency
Interrupts</a></li>
+<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance: Zero Latency Interrupts,
Maskable nested interrupts</a></li>
<li class="toctree-l2"><a class="reference internal" href="kasan.html">The
Kernel Address Sanitizer (KASAN)</a></li>
<li class="toctree-l2"><a class="reference internal"
href="nestedinterrupts.html">Nested Interrupts</a></li>
<li class="toctree-l2"><a class="reference internal"
href="cortexmhardfaults.html">Analyzing Cortex-M Hardfaults</a></li>
diff --git a/content/docs/latest/guides/customboards.html
b/content/docs/latest/guides/customboards.html
index a3b3eb1ef..3084584ef 100644
--- a/content/docs/latest/guides/customboards.html
+++ b/content/docs/latest/guides/customboards.html
@@ -140,7 +140,7 @@
</li>
<li class="toctree-l2"><a class="reference internal"
href="customapps.html">Custom Apps How-to</a></li>
<li class="toctree-l2"><a class="reference internal"
href="citests.html">Running CI Test Locally</a></li>
-<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance, Zero Latency
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index 7a01fc8c3..714627d58 100644
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index ad0b2f822..24f612dad 100644
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diff --git a/content/docs/latest/guides/stackrecord.html
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index 73cef24fb..4424273f0 100644
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href="citests.html">Running CI Test Locally</a></li>
-<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance, Zero Latency
Interrupts</a></li>
+<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance: Zero Latency Interrupts,
Maskable nested interrupts</a></li>
<li class="toctree-l2"><a class="reference internal" href="kasan.html">The
Kernel Address Sanitizer (KASAN)</a></li>
<li class="toctree-l2"><a class="reference internal"
href="nestedinterrupts.html">Nested Interrupts</a></li>
<li class="toctree-l2"><a class="reference internal"
href="cortexmhardfaults.html">Analyzing Cortex-M Hardfaults</a></li>
diff --git a/content/docs/latest/guides/stm32nullpointer.html
b/content/docs/latest/guides/stm32nullpointer.html
index f14604403..af82c9ab4 100644
--- a/content/docs/latest/guides/stm32nullpointer.html
+++ b/content/docs/latest/guides/stm32nullpointer.html
@@ -136,7 +136,7 @@
<li class="toctree-l2"><a class="reference internal"
href="customboards.html">Custom Boards How-To</a></li>
<li class="toctree-l2"><a class="reference internal"
href="customapps.html">Custom Apps How-to</a></li>
<li class="toctree-l2"><a class="reference internal"
href="citests.html">Running CI Test Locally</a></li>
-<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance, Zero Latency
Interrupts</a></li>
+<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance: Zero Latency Interrupts,
Maskable nested interrupts</a></li>
<li class="toctree-l2"><a class="reference internal" href="kasan.html">The
Kernel Address Sanitizer (KASAN)</a></li>
<li class="toctree-l2"><a class="reference internal"
href="nestedinterrupts.html">Nested Interrupts</a></li>
<li class="toctree-l2"><a class="reference internal"
href="cortexmhardfaults.html">Analyzing Cortex-M Hardfaults</a></li>
diff --git a/content/docs/latest/guides/tasktrace.html
b/content/docs/latest/guides/tasktrace.html
index 8c6f5334b..a43f35e9f 100644
--- a/content/docs/latest/guides/tasktrace.html
+++ b/content/docs/latest/guides/tasktrace.html
@@ -140,7 +140,7 @@
<li class="toctree-l2"><a class="reference internal"
href="customboards.html">Custom Boards How-To</a></li>
<li class="toctree-l2"><a class="reference internal"
href="customapps.html">Custom Apps How-to</a></li>
<li class="toctree-l2"><a class="reference internal"
href="citests.html">Running CI Test Locally</a></li>
-<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance, Zero Latency
Interrupts</a></li>
+<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance: Zero Latency Interrupts,
Maskable nested interrupts</a></li>
<li class="toctree-l2"><a class="reference internal" href="kasan.html">The
Kernel Address Sanitizer (KASAN)</a></li>
<li class="toctree-l2"><a class="reference internal"
href="nestedinterrupts.html">Nested Interrupts</a></li>
<li class="toctree-l2"><a class="reference internal"
href="cortexmhardfaults.html">Analyzing Cortex-M Hardfaults</a></li>
diff --git a/content/docs/latest/guides/tasktraceinternal.html
b/content/docs/latest/guides/tasktraceinternal.html
index 1bf9ee956..3b6aff451 100644
--- a/content/docs/latest/guides/tasktraceinternal.html
+++ b/content/docs/latest/guides/tasktraceinternal.html
@@ -155,7 +155,7 @@
<li class="toctree-l2"><a class="reference internal"
href="customboards.html">Custom Boards How-To</a></li>
<li class="toctree-l2"><a class="reference internal"
href="customapps.html">Custom Apps How-to</a></li>
<li class="toctree-l2"><a class="reference internal"
href="citests.html">Running CI Test Locally</a></li>
-<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance, Zero Latency
Interrupts</a></li>
+<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance: Zero Latency Interrupts,
Maskable nested interrupts</a></li>
<li class="toctree-l2"><a class="reference internal" href="kasan.html">The
Kernel Address Sanitizer (KASAN)</a></li>
<li class="toctree-l2"><a class="reference internal"
href="nestedinterrupts.html">Nested Interrupts</a></li>
<li class="toctree-l2"><a class="reference internal"
href="cortexmhardfaults.html">Analyzing Cortex-M Hardfaults</a></li>
diff --git a/content/docs/latest/guides/tasktraceuser.html
b/content/docs/latest/guides/tasktraceuser.html
index 832e74289..caba18929 100644
--- a/content/docs/latest/guides/tasktraceuser.html
+++ b/content/docs/latest/guides/tasktraceuser.html
@@ -161,7 +161,7 @@
<li class="toctree-l2"><a class="reference internal"
href="customboards.html">Custom Boards How-To</a></li>
<li class="toctree-l2"><a class="reference internal"
href="customapps.html">Custom Apps How-to</a></li>
<li class="toctree-l2"><a class="reference internal"
href="citests.html">Running CI Test Locally</a></li>
-<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance, Zero Latency
Interrupts</a></li>
+<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance: Zero Latency Interrupts,
Maskable nested interrupts</a></li>
<li class="toctree-l2"><a class="reference internal" href="kasan.html">The
Kernel Address Sanitizer (KASAN)</a></li>
<li class="toctree-l2"><a class="reference internal"
href="nestedinterrupts.html">Nested Interrupts</a></li>
<li class="toctree-l2"><a class="reference internal"
href="cortexmhardfaults.html">Analyzing Cortex-M Hardfaults</a></li>
diff --git a/content/docs/latest/guides/testingtcpip.html
b/content/docs/latest/guides/testingtcpip.html
index 265bf553c..bf85c2991 100644
--- a/content/docs/latest/guides/testingtcpip.html
+++ b/content/docs/latest/guides/testingtcpip.html
@@ -136,7 +136,7 @@
<li class="toctree-l2"><a class="reference internal"
href="customboards.html">Custom Boards How-To</a></li>
<li class="toctree-l2"><a class="reference internal"
href="customapps.html">Custom Apps How-to</a></li>
<li class="toctree-l2"><a class="reference internal"
href="citests.html">Running CI Test Locally</a></li>
-<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance, Zero Latency
Interrupts</a></li>
+<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance: Zero Latency Interrupts,
Maskable nested interrupts</a></li>
<li class="toctree-l2"><a class="reference internal" href="kasan.html">The
Kernel Address Sanitizer (KASAN)</a></li>
<li class="toctree-l2"><a class="reference internal"
href="nestedinterrupts.html">Nested Interrupts</a></li>
<li class="toctree-l2"><a class="reference internal"
href="cortexmhardfaults.html">Analyzing Cortex-M Hardfaults</a></li>
diff --git a/content/docs/latest/guides/thread_local_storage.html
b/content/docs/latest/guides/thread_local_storage.html
index b96c5d103..4b9ec31d0 100644
--- a/content/docs/latest/guides/thread_local_storage.html
+++ b/content/docs/latest/guides/thread_local_storage.html
@@ -136,7 +136,7 @@
<li class="toctree-l2"><a class="reference internal"
href="customboards.html">Custom Boards How-To</a></li>
<li class="toctree-l2"><a class="reference internal"
href="customapps.html">Custom Apps How-to</a></li>
<li class="toctree-l2"><a class="reference internal"
href="citests.html">Running CI Test Locally</a></li>
-<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance, Zero Latency
Interrupts</a></li>
+<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance: Zero Latency Interrupts,
Maskable nested interrupts</a></li>
<li class="toctree-l2"><a class="reference internal" href="kasan.html">The
Kernel Address Sanitizer (KASAN)</a></li>
<li class="toctree-l2"><a class="reference internal"
href="nestedinterrupts.html">Nested Interrupts</a></li>
<li class="toctree-l2"><a class="reference internal"
href="cortexmhardfaults.html">Analyzing Cortex-M Hardfaults</a></li>
diff --git a/content/docs/latest/guides/usbtrace.html
b/content/docs/latest/guides/usbtrace.html
index 94ab81a56..86b9832b4 100644
--- a/content/docs/latest/guides/usbtrace.html
+++ b/content/docs/latest/guides/usbtrace.html
@@ -136,7 +136,7 @@
<li class="toctree-l2"><a class="reference internal"
href="customboards.html">Custom Boards How-To</a></li>
<li class="toctree-l2"><a class="reference internal"
href="customapps.html">Custom Apps How-to</a></li>
<li class="toctree-l2"><a class="reference internal"
href="citests.html">Running CI Test Locally</a></li>
-<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance, Zero Latency
Interrupts</a></li>
+<li class="toctree-l2"><a class="reference internal"
href="zerolatencyinterrupts.html">High Performance: Zero Latency Interrupts,
Maskable nested interrupts</a></li>
<li class="toctree-l2"><a class="reference internal" href="kasan.html">The
Kernel Address Sanitizer (KASAN)</a></li>
<li class="toctree-l2"><a class="reference internal"
href="nestedinterrupts.html">Nested Interrupts</a></li>
<li class="toctree-l2"><a class="reference internal"
href="cortexmhardfaults.html">Analyzing Cortex-M Hardfaults</a></li>
diff --git a/content/docs/latest/guides/zerolatencyinterrupts.html
b/content/docs/latest/guides/zerolatencyinterrupts.html
index 98658e250..49eea11f3 100644
--- a/content/docs/latest/guides/zerolatencyinterrupts.html
+++ b/content/docs/latest/guides/zerolatencyinterrupts.html
@@ -25,7 +25,7 @@
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http://docutils.sourceforge.net/"; />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
- <title>High Performance, Zero Latency Interrupts — NuttX latest
documentation</title>
+ <title>High Performance: Zero Latency Interrupts, Maskable nested interrupts
— NuttX latest documentation</title>
<link rel="stylesheet" type="text/css" href="../_static/pygments.css" />
<link rel="stylesheet" type="text/css" href="../_static/css/theme.css" />
<link rel="stylesheet" type="text/css" href="../_static/copybutton.css"
/>
@@ -136,10 +136,11 @@
<li class="toctree-l2"><a class="reference internal"
href="customboards.html">Custom Boards How-To</a></li>
<li class="toctree-l2"><a class="reference internal"
href="customapps.html">Custom Apps How-to</a></li>
<li class="toctree-l2"><a class="reference internal"
href="citests.html">Running CI Test Locally</a></li>
-<li class="toctree-l2 current"><a class="current reference internal"
href="#">High Performance, Zero Latency Interrupts</a><ul>
+<li class="toctree-l2 current"><a class="current reference internal"
href="#">High Performance: Zero Latency Interrupts, Maskable nested
interrupts</a><ul>
<li class="toctree-l3"><a class="reference internal"
href="#generic-interrupt-handling">Generic Interrupt Handling</a></li>
<li class="toctree-l3"><a class="reference internal"
href="#bypassing-the-generic-interrupt-handling">Bypassing the Generic
Interrupt Handling</a></li>
<li class="toctree-l3"><a class="reference internal"
href="#getting-back-into-the-game">Getting Back into the Game</a></li>
+<li class="toctree-l3"><a class="reference internal"
href="#maskable-nested-interrupts">Maskable Nested Interrupts</a></li>
<li class="toctree-l3"><a class="reference internal"
href="#nested-interrupt-handling">Nested Interrupt Handling</a></li>
<li class="toctree-l3"><a class="reference internal"
href="#cortex-m3-4-implementation">Cortex-M3/4 Implementation</a><ul>
<li class="toctree-l4"><a class="reference internal"
href="#configuration-options">Configuration Options</a></li>
@@ -188,7 +189,7 @@
<ul class="wy-breadcrumbs">
<li><a href="../index.html" class="icon icon-home"
aria-label="Home"></a></li>
<li class="breadcrumb-item"><a href="index.html">Guides</a></li>
- <li class="breadcrumb-item active">High Performance, Zero Latency
Interrupts</li>
+ <li class="breadcrumb-item active">High Performance: Zero Latency
Interrupts, Maskable nested interrupts</li>
<li class="wy-breadcrumbs-aside">
<a href="../_sources/guides/zerolatencyinterrupts.rst.txt"
rel="nofollow"> View page source</a>
</li>
@@ -198,8 +199,8 @@
<div role="main" class="document" itemscope="itemscope"
itemtype="http://schema.org/Article";>
<div itemprop="articleBody">
- <section id="high-performance-zero-latency-interrupts">
-<h1>High Performance, Zero Latency Interrupts<a class="headerlink"
href="#high-performance-zero-latency-interrupts" title="Permalink to this
heading"></a></h1>
+ <section
id="high-performance-zero-latency-interrupts-maskable-nested-interrupts">
+<h1>High Performance: Zero Latency Interrupts, Maskable nested interrupts<a
class="headerlink"
href="#high-performance-zero-latency-interrupts-maskable-nested-interrupts"
title="Permalink to this heading"></a></h1>
<section id="generic-interrupt-handling">
<h2>Generic Interrupt Handling<a class="headerlink"
href="#generic-interrupt-handling" title="Permalink to this heading"></a></h2>
<p>NuttX includes a generic interrupt handling subsystem that makes it
@@ -292,6 +293,51 @@ same thing.</p>
between the high priority interrupt handler and <em>PendSV</em> interrupt
handler. A detailed discussion of that custom logic is beyond the
scope of this Wiki page.</p>
+<p>The following table shows the priority levels of the Cortex-M family:</p>
+<div class="highlight-none notranslate"><div
class="highlight"><pre><span></span>IRQ type Priority
+Dataabort 0x00
+High prio IRQ1 0x20 (Zero-latency interrupt)
+High prio IRQ2 0x30 (Can't call OS API in ISR)
+SVC 0x70
+Disable IRQ 0x80
+(critical-section)
+Low prio IRQ 0xB0
+PendSV 0xE0
+</pre></div>
+</div>
+<p>As you can see, the priority levels of the zero-latency interrupts can
+beyond the critical section and SVC.
+But High prio IRQ can’t call OS API.</p>
+</section>
+<section id="maskable-nested-interrupts">
+<h2>Maskable Nested Interrupts<a class="headerlink"
href="#maskable-nested-interrupts" title="Permalink to this heading"></a></h2>
+<p>The ARM Cortex-M family supports a feature called <em>BASEPRI</em> that can
be
+used to disable interrupts at a priority level below a certain level.
+This feature can be used to support maskable nested interrupts.</p>
+<p>Maskable nested interrupts differ from zero-latency interrupts in
+that they obey the interrupt masking mechanisms of the system.
+For example, setting the BASEPRI register to a specific threshold will
+block all interrupts of a lower or equal priority.
+However, high-priority interrupts (such as Non-Maskable Interrupts
+or zero-latency interrupts) are unaffected by these masks.</p>
+<p>This is useful when you have a high-priority interrupt that needs to
+be able to interrupt the system, but you also have lower-priority
+interrupts that you want to be able to mask.</p>
+<p>The following table shows the priority levels of the Cortex-M family:</p>
+<div class="highlight-none notranslate"><div
class="highlight"><pre><span></span>IRQ type Priority
+Dataabort 0x00
+SVC 0x70
+Disable IRQ 0x80
+(critical-section)
+High prio IRQ1 0x90 (Maskable nested interrupt)
+High prio IRQ2 0xA0 (Can call OS API in ISR)
+Low prio IRQ 0xB0
+PendSV 0xE0
+</pre></div>
+</div>
+<p>As you can see, the priority levels of the maskable nested interrupts
+are between the critical section and the low-priority interrupts.
+And High prio IRQ can call OS API in ISR.</p>
</section>
<section id="nested-interrupt-handling">
<h2>Nested Interrupt Handling<a class="headerlink"
href="#nested-interrupt-handling" title="Permalink to this heading"></a></h2>
diff --git a/content/docs/latest/implementation/critical_sections.html
b/content/docs/latest/implementation/critical_sections.html
index 0d14e984a..d2d1457a3 100644
--- a/content/docs/latest/implementation/critical_sections.html
+++ b/content/docs/latest/implementation/critical_sections.html
@@ -216,7 +216,7 @@ amount of “jitter” in the response time is expected. The
important thing is
the maximum time that critical sections are in place in order to manage that
jitter so
that the variability in response time is within an acceptable range.</p>
<p>NOTE: This discussion applies to Normal interrupt processing. Most of this
discussion
-does not apply to <a class="reference internal"
href="../guides/zerolatencyinterrupts.html"><span class="doc">High Performance,
Zero Latency Interrupts</span></a>. Those interrupts are not masked
+does not apply to <a class="reference internal"
href="../guides/zerolatencyinterrupts.html"><span class="doc">High Performance:
Zero Latency Interrupts, Maskable nested interrupts</span></a>. Those
interrupts are not masked
in the same fashion and none of the issues address in this page apply to those
interrupts.</p>
</section>
@@ -611,7 +611,7 @@ with a locking semaphore. The scope of the locking effect
for the use of such lo
is not global but is limited only to tasks that share the same resource.
Critical
sections should correctly be used only to protect resources that are shared
between
tasking level logic and interrupt level logic.</p></li>
-<li><p>Switch to <a class="reference internal"
href="../guides/zerolatencyinterrupts.html"><span class="doc">High Performance,
Zero Latency Interrupts</span></a>. Those interrupts are not subject
+<li><p>Switch to <a class="reference internal"
href="../guides/zerolatencyinterrupts.html"><span class="doc">High Performance:
Zero Latency Interrupts, Maskable nested interrupts</span></a>. Those
interrupts are not subject
to most of the issues discussed in this page.</p></li>
</ol>
<p><strong>NOTE</strong></p>
diff --git a/content/docs/latest/index.html b/content/docs/latest/index.html
index dc908092e..433251b95 100644
--- a/content/docs/latest/index.html
+++ b/content/docs/latest/index.html
@@ -171,7 +171,7 @@ standards. Additional standard APIs from Unix and other
common RTOS’s (such as
VxWorks) are adopted for functionality not available under these standards, or
for functionality that is not appropriate for deeply-embedded environments
(such
as fork()).</p>
-<p>Last Updated: 09 October 24 at 00:22</p>
+<p>Last Updated: 10 October 24 at 00:22</p>
<div class="toctree-wrapper compound">
<p class="caption" role="heading"><span class="caption-text">Table of
Contents</span></p>
<ul class="current">
@@ -318,7 +318,7 @@ as fork()).</p>
<li class="toctree-l2"><a class="reference internal"
href="guides/customboards.html">Custom Boards How-To</a></li>
<li class="toctree-l2"><a class="reference internal"
href="guides/customapps.html">Custom Apps How-to</a></li>
<li class="toctree-l2"><a class="reference internal"
href="guides/citests.html">Running CI Test Locally</a></li>
-<li class="toctree-l2"><a class="reference internal"
href="guides/zerolatencyinterrupts.html">High Performance, Zero Latency
Interrupts</a></li>
+<li class="toctree-l2"><a class="reference internal"
href="guides/zerolatencyinterrupts.html">High Performance: Zero Latency
Interrupts, Maskable nested interrupts</a></li>
<li class="toctree-l2"><a class="reference internal"
href="guides/kasan.html">The Kernel Address Sanitizer (KASAN)</a></li>
<li class="toctree-l2"><a class="reference internal"
href="guides/nestedinterrupts.html">Nested Interrupts</a></li>
<li class="toctree-l2"><a class="reference internal"
href="guides/cortexmhardfaults.html">Analyzing Cortex-M Hardfaults</a></li>
diff --git a/content/docs/latest/objects.inv b/content/docs/latest/objects.inv
index f01b074ce..ebd1f30a8 100644
Binary files a/content/docs/latest/objects.inv and
b/content/docs/latest/objects.inv differ
diff --git
a/content/docs/latest/platforms/arm64/qemu/boards/qemu-armv8a/index.html
b/content/docs/latest/platforms/arm64/qemu/boards/qemu-armv8a/index.html
index 119efd246..cbbd3865c 100644
--- a/content/docs/latest/platforms/arm64/qemu/boards/qemu-armv8a/index.html
+++ b/content/docs/latest/platforms/arm64/qemu/boards/qemu-armv8a/index.html
@@ -348,6 +348,12 @@ Getting Started
Configuring NuttX and compile:
$ ./tools/configure.sh -l qemu-armv8a:knsh
$ make
+ $ make export V=1
+ $ pushd ../apps
+ $ ./tools/mkimport.sh -z -x ../nuttx/nuttx-export-*.tar.gz
+ $ make import V=1
+ $ popd
+
Running with qemu
$ qemu-system-aarch64 -semihosting -cpu cortex-a53 -nographic \
-machine virt,virtualization=on,gic-version=3 \
diff --git a/content/docs/latest/searchindex.js
b/content/docs/latest/searchindex.js
index fc6fba823..d4499ca89 100644
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+++ b/content/docs/latest/searchindex.js
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"applications/benchmarks/coremark-pro/index",
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"applications/benchmarks/index", "applications/benchmarks/iozone/index",
"applications/bench [...]
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+Search.setIndex({"docnames": ["applications/audioutils/fmsynt/index",
"applications/audioutils/index", "applications/audioutils/mml_parser/index",
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"applications/benchmarks/coremark/index",
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index a084012c1..fe65fc691 100644
--- a/content/feed.xml
+++ b/content/feed.xml
@@ -5,8 +5,8 @@
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<link>/</link>
<atom:link href="/feed.xml" rel="self" type="application/rss+xml"/>
- <pubDate>Wed, 09 Oct 2024 00:24:22 +0000</pubDate>
- <lastBuildDate>Wed, 09 Oct 2024 00:24:22 +0000</lastBuildDate>
+ <pubDate>Thu, 10 Oct 2024 00:24:10 +0000</pubDate>
+ <lastBuildDate>Thu, 10 Oct 2024 00:24:10 +0000</lastBuildDate>
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