<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
<html lang="en" style="--code-editor-font: var(--default-mono-font, "GitLab Mono"), JetBrains Mono, Menlo, DejaVu Sans Mono, Liberation Mono, Consolas, Ubuntu Mono, Courier New, andale mono, lucida console, monospace;">
<head>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
<title>
GitLab
</title>
<style data-premailer="ignore" type="text/css">
a { color: #1068bf; }
</style>
<style>img {
max-width: 100%; height: auto;
}
body {
font-size: .875rem;
}
body {
-webkit-text-shadow: rgba(255,255,255,.01) 0 0 1px;
}
body {
font-family: "GitLab Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans",Ubuntu,Cantarell,"Helvetica Neue",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"; font-size: inherit;
}
</style>
</head>
<body style="font-size: inherit; -webkit-text-shadow: rgba(255,255,255,.01) 0 0 1px; font-family: "GitLab Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans",Ubuntu,Cantarell,"Helvetica Neue",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji";">
<div class="content">
<p class="details" style="font-style: italic; color: #626168;">
<a href="https://gitlab.rtems.org/ppisa">Pavel Pisa</a> created an issue: <a href="https://gitlab.rtems.org/rtems/rtos/rtems/-/issues/5563">#5563</a>
</p>
<div class="md" style="position: relative; z-index: 1; color: #3a383f; word-wrap: break-word;">
<h2 id="user-content-summary" dir="auto" style="margin-top: 0; margin-bottom: 10px;" align="initial">Summary<a href="#summary" aria-label="Link to heading 'Summary'" data-heading-content="Summary" class="anchor" style="margin-top: 0;"></a>
</h2>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">When SJA1000 support has been tested on x86 it has been done out-of-mainline tree against RTEMS build i386/pc686. The header file defining <code style="font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; margin-top: 0; font-weight: inherit; overflow-wrap: break-word; white-space: break-spaces; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; word-break: keep-all; padding: 0.125rem 0.25rem;">inb</code> and <code style="font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; font-weight: inherit; overflow-wrap: break-word; white-space: break-spaces; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; word-break: keep-all; padding: 0.125rem 0.25rem;">outb</code> is installed in</p>
<div class="gl-relative markdown-code-block js-markdown-code">
<pre class="code highlight js-syntax-highlight language-plaintext" v-pre="true" style="display: block; font-size: 14px; color: #3a383f; line-height: 1.6em; overflow-x: auto; border-radius: .25rem; position: relative; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; margin: 0 0 1rem; padding: 12px; border: 1px solid #dcdcde;"><code style="font-size: inherit; color: inherit; word-wrap: normal; word-break: keep-all; background-color: inherit; border-radius: .25rem; white-space: pre; margin-top: 0; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; overflow-wrap: normal; padding: unset;"><span id="LC1" class="line" lang="plaintext" style="margin-top: 0;">/opt/rtems/7/i386-rtems7/pc686/lib/include/i386_io.h</span></code></pre>
<copy-code></copy-code><insert-code-snippet></insert-code-snippet>
</div>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">and code builds OK. I have proposed to Michal to include change
in his mainline patch but he has tested it only with AMD/Xilinx
Zynq.</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">Problem is that rtems/cpukit is build in separation from BSPs and that is why located in BSPs section <code style="font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; margin-top: 0; font-weight: inherit; overflow-wrap: break-word; white-space: break-spaces; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; word-break: keep-all; padding: 0.125rem 0.25rem;">rtems/bsps/i386/include/i386_io.h</code> is not seen by build</p>
<div class="gl-relative markdown-code-block js-markdown-code">
<pre class="code highlight js-syntax-highlight language-plaintext" v-pre="true" style="display: block; font-size: 14px; color: #3a383f; line-height: 1.6em; overflow-x: auto; border-radius: .25rem; position: relative; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; margin: 0 0 1rem; padding: 12px; border: 1px solid #dcdcde;"><code style="font-size: inherit; color: inherit; word-wrap: normal; word-break: keep-all; background-color: inherit; border-radius: .25rem; white-space: pre; margin-top: 0; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; overflow-wrap: normal; padding: unset;"><span id="LC1" class="line" lang="plaintext" style="margin-top: 0;">/opt/rtems/7/bin/i386-rtems7-gcc -MMD', '-std=gnu23 -D_BSD_SOURCE \</span>
<span id="LC2" class="line" lang="plaintext">-Wall -Wextra -Werror -Wmissing-prototypes -Wimplicit-function-declaration \</span>
<span id="LC3" class="line" lang="plaintext">-Wstrict-prototypes -Wnested-externs -Wold-style-declaration \</span>
<span id="LC4" class="line" lang="plaintext">-mtune=pentiumpro -march=pentium -ffunction-sections -fdata-sections \</span>
<span id="LC5" class="line" lang="plaintext">-O2 -g -Icpukit/include \</span>
<span id="LC6" class="line" lang="plaintext">-I../../../../../git/rtems/cpukit/include \</span>
<span id="LC7" class="line" lang="plaintext">-Icpukit/score/cpu/i386/include \</span>
<span id="LC8" class="line" lang="plaintext">-I../../../../../git/rtems/cpukit/score/cpu/i386/include \</span>
<span id="LC9" class="line" lang="plaintext">-Icpukit/contrib/include \</span>
<span id="LC10" class="line" lang="plaintext">-I../../../../../git/rtems/cpukit/contrib/include \</span>
<span id="LC11" class="line" lang="plaintext">-Icontrib/cpukit/include \</span>
<span id="LC12" class="line" lang="plaintext">-I../../../../../git/rtems/contrib/cpukit/include \</span>
<span id="LC13" class="line" lang="plaintext">-Icontrib/cpukit/fastlz \</span>
<span id="LC14" class="line" lang="plaintext">-I../../../../../git/rtems/contrib/cpukit/fastlz \</span>
<span id="LC15" class="line" lang="plaintext">-Icontrib/cpukit/utf8proc \</span>
<span id="LC16" class="line" lang="plaintext">-I../../../../../git/rtems/contrib/cpukit/utf8proc \</span>
<span id="LC17" class="line" lang="plaintext">-Icontrib/cpukit/uuid \</span>
<span id="LC18" class="line" lang="plaintext">-I../../../../../git/rtems/contrib/cpukit/uuid \</span>
<span id="LC19" class="line" lang="plaintext">-Icontrib/cpukit/zlib \</span>
<span id="LC20" class="line" lang="plaintext">-I../../../../../git/rtems/contrib/cpukit/zlib \</span>
<span id="LC21" class="line" lang="plaintext">-Icontrib/cpukit/xz-embedded/userspace \</span>
<span id="LC22" class="line" lang="plaintext">-I../../../../../git/rtems/contrib/cpukit/xz-embedded/userspace \</span>
<span id="LC23" class="line" lang="plaintext">../../../../../git/rtems/cpukit/dev/can/sja1000/sja1000.c \</span>
<span id="LC24" class="line" lang="plaintext">-c -o..../cpukit/dev/can/sja1000/sja1000.c.60.o \</span>
<span id="LC25" class="line" lang="plaintext">-DHAVE_CONFIG_H=1</span></code></pre>
<copy-code></copy-code><insert-code-snippet></insert-code-snippet>
</div>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">The fast fix is to disable option to support I/O mapped SJA1000 chips</p>
<div class="gl-relative markdown-code-block js-markdown-code">
<pre class="code highlight js-syntax-highlight language-plaintext" v-pre="true" style="display: block; font-size: 14px; color: #3a383f; line-height: 1.6em; overflow-x: auto; border-radius: .25rem; position: relative; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; margin: 0 0 1rem; padding: 12px; border: 1px solid #dcdcde;"><code style="font-size: inherit; color: inherit; word-wrap: normal; word-break: keep-all; background-color: inherit; border-radius: .25rem; white-space: pre; margin-top: 0; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; overflow-wrap: normal; padding: unset;"><span id="LC1" class="line" lang="plaintext" style="margin-top: 0;">#if defined(__i386__)</span>
<span id="LC2" class="line" lang="plaintext">#define RTEMS_CAN_SJA1000_ARCH_WITH_IO_PORTS 1</span>
<span id="LC3" class="line" lang="plaintext">#include "i386_io.h"</span>
<span id="LC4" class="line" lang="plaintext">#endif</span></code></pre>
<copy-code></copy-code><insert-code-snippet></insert-code-snippet>
</div>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">The proper correction is more problematic because I have not found some portable I/O access primitives in general for memory mapped peripheral accesses with proper barriers on the architectures which require that and for IO mapped devices. Linux kernel provides methods for IO mapped (<code style="font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; margin-top: 0; font-weight: inherit; overflow-wrap: break-word; white-space: break-spaces; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; word-break: keep-all; padding: 0.125rem 0.25rem;">inb</code> and <code style="font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; font-weight: inherit; overflow-wrap: break-word; white-space: break-spaces; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; word-break: keep-all; padding: 0.125rem 0.25rem;">outb</code>) and MEM mapped devices accesses (<code style="font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; font-weight: inherit; overflow-wrap: break-word; white-space: break-spaces; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; word-break: keep-all; padding: 0.125rem 0.25rem;">readb</code> and <code style="font-size: 90%; color: #18171d; word-wrap: break-word; background-color: #ececef; border-radius: .25rem; font-weight: inherit; overflow-wrap: break-word; white-space: break-spaces; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; word-break: keep-all; padding: 0.125rem 0.25rem;">writeb</code>). But there are even iowrite8 and ioread8 which allows to receive not only memory addresses but even I/O cookie on architectures that require that for PCI/PCIe I/O space access. Which these guaranteed
functions over all architectures it is easy to write drivers which work on PCI with every architecture</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial"><a href="https://docs.kernel.org/driver-api/device-io.html" rel="nofollow noreferrer noopener" target="_blank" style="margin-top: 0;">https://docs.kernel.org/driver-api/device-io.html</a></p>
<h2 id="user-content-steps-to-reproduce" dir="auto" style="margin-top: 20px; margin-bottom: 10px;" align="initial">Steps to reproduce<a href="#steps-to-reproduce" aria-label="Link to heading 'Steps to reproduce'" data-heading-content="Steps to reproduce" class="anchor" style="margin-top: 0;"></a>
</h2>
<div class="gl-relative markdown-code-block js-markdown-code" style="margin-bottom: 0;">
<pre class="code highlight js-syntax-highlight language-plaintext" v-pre="true" style="display: block; font-size: 14px; color: #3a383f; line-height: 1.6em; overflow-x: auto; border-radius: .25rem; position: relative; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; margin: 0 0 1rem; padding: 12px; border: 1px solid #dcdcde;"><code style="font-size: inherit; color: inherit; word-wrap: normal; word-break: keep-all; background-color: inherit; border-radius: .25rem; white-space: pre; margin-top: 0; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; overflow-wrap: normal; padding: unset;"><span id="LC1" class="line" lang="plaintext" style="margin-top: 0;">$RTEMS_DIR/waf bspdefaults --rtems-bsps=i386/pc686 -t "$RTEMS_DIR" -o "$MY_DIR" --prefix "/opt/rtems/7" >config.ini || exit 1</span>
<span id="LC2" class="line" lang="plaintext">$RTEMS_DIR/waf configure -t "$RTEMS_DIR" -o "$MY_DIR" --rtems-config "$MY_DIR/config.ini" --prefix "/opt/rtems/7" || exit 1</span>
<span id="LC3" class="line" lang="plaintext">$RTEMS_DIR/waf -v || exit 1</span></code></pre>
<copy-code></copy-code><insert-code-snippet></insert-code-snippet>
</div>
</div>
</div>
<div class="footer" style="margin-top: 10px;">
<p style="font-size: small; color: #626168;">
—
<br>
<a href="https://gitlab.rtems.org/rtems/rtos/rtems/-/issues/5563">View it on GitLab</a>.
<br>
You're receiving this email because of your account on <a target="_blank" rel="noopener noreferrer" href="https://gitlab.rtems.org">gitlab.rtems.org</a>. <a href="https://gitlab.rtems.org/-/sent_notifications/3-2n1ml22lf0t0s6qgzrplaa62u/unsubscribe" target="_blank" rel="noopener noreferrer">Unsubscribe</a> from this thread · <a href="https://gitlab.rtems.org/-/profile/notifications" target="_blank" rel="noopener noreferrer" class="mng-notif-link">Manage all notifications</a> · <a href="https://gitlab.rtems.org/help" target="_blank" rel="noopener noreferrer" class="help-link">Help</a>
<span style="color: transparent; font-size: 0; display: none; overflow: hidden; opacity: 0; width: 0; height: 0; max-width: 0; max-height: 0;">
Notification message regarding https://gitlab.rtems.org/rtems/rtos/rtems/-/issues/5563 at 1777422699
</span>
<script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","action":{"@type":"ViewAction","name":"View Issue","url":"https://gitlab.rtems.org/rtems/rtos/rtems/-/issues/5563"}}</script>
</p>
</div>
</body>
</html>