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<li class="breadcrumb-item active">ppce500 generic platform (<code class="docutils literal notranslate"><span class="pre">ppce500</span></code>)</li>
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<section id="ppce500-generic-platform-ppce500">
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<h1>ppce500 generic platform (<code class="docutils literal notranslate"><span class="pre">ppce500</span></code>)<a class="headerlink" href="#ppce500-generic-platform-ppce500" title="Link to this heading"></a></h1>
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<p>QEMU for PPC supports a special <code class="docutils literal notranslate"><span class="pre">ppce500</span></code> machine designed for emulation and
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virtualization purposes.</p>
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<section id="supported-devices">
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<h2>Supported devices<a class="headerlink" href="#supported-devices" title="Link to this heading"></a></h2>
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<p>The <code class="docutils literal notranslate"><span class="pre">ppce500</span></code> machine supports the following devices:</p>
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<ul class="simple">
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<li><p>PowerPC e500 series core (e500v2/e500mc/e5500/e6500)</p></li>
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<li><p>Configuration, Control, and Status Register (CCSR)</p></li>
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<li><p>Multicore Programmable Interrupt Controller (MPIC) with MSI support</p></li>
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<li><p>1 16550A UART device</p></li>
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<li><p>1 Freescale MPC8xxx I2C controller</p></li>
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<li><p>1 Pericom pt7c4338 RTC via I2C</p></li>
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<li><p>1 Freescale MPC8xxx GPIO controller</p></li>
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<li><p>Power-off functionality via one GPIO pin</p></li>
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<li><p>1 Freescale MPC8xxx PCI host controller</p></li>
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<li><p>VirtIO devices via PCI bus</p></li>
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<li><p>1 Freescale Enhanced Secure Digital Host controller (eSDHC)</p></li>
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<li><p>1 Freescale Enhanced Triple Speed Ethernet controller (eTSEC)</p></li>
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</ul>
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</section>
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<section id="hardware-configuration-information">
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<h2>Hardware configuration information<a class="headerlink" href="#hardware-configuration-information" title="Link to this heading"></a></h2>
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<p>The <code class="docutils literal notranslate"><span class="pre">ppce500</span></code> machine automatically generates a device tree blob (“dtb”)
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which it passes to the guest, if there is no <code class="docutils literal notranslate"><span class="pre">-dtb</span></code> option. This provides
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information about the addresses, interrupt lines and other configuration of
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the various devices in the system.</p>
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<p>If users want to provide their own DTB, they can use the <code class="docutils literal notranslate"><span class="pre">-dtb</span></code> option.
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These DTBs should have the following requirements:</p>
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<ul class="simple">
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<li><p>The number of subnodes under /cpus node should match QEMU’s <code class="docutils literal notranslate"><span class="pre">-smp</span></code> option</p></li>
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<li><p>The /memory reg size should match QEMU’s selected ram_size via <code class="docutils literal notranslate"><span class="pre">-m</span></code></p></li>
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</ul>
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<p>Both <code class="docutils literal notranslate"><span class="pre">qemu-system-ppc</span></code> and <code class="docutils literal notranslate"><span class="pre">qemu-system-ppc64</span></code> provide emulation for the
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following 32-bit PowerPC CPUs:</p>
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<ul class="simple">
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<li><p>e500v2</p></li>
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<li><p>e500mc</p></li>
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</ul>
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<p>Additionally <code class="docutils literal notranslate"><span class="pre">qemu-system-ppc64</span></code> provides support for the following 64-bit
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PowerPC CPUs:</p>
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<ul class="simple">
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<li><p>e5500</p></li>
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<li><p>e6500</p></li>
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</ul>
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<p>The CPU type can be specified via the <code class="docutils literal notranslate"><span class="pre">-cpu</span></code> command line. If not specified,
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it creates a machine with e500v2 core. The following example shows an e6500
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based machine creation:</p>
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<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>qemu-system-ppc64<span class="w"> </span>-nographic<span class="w"> </span>-M<span class="w"> </span>ppce500<span class="w"> </span>-cpu<span class="w"> </span>e6500
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</pre></div>
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</div>
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</section>
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<section id="boot-options">
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<h2>Boot options<a class="headerlink" href="#boot-options" title="Link to this heading"></a></h2>
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<p>The <code class="docutils literal notranslate"><span class="pre">ppce500</span></code> machine can start using the standard -kernel functionality
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for loading a payload like an OS kernel (e.g.: Linux), or U-Boot firmware.</p>
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<p>When -bios is omitted, the default pc-bios/u-boot.e500 firmware image is used
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as the BIOS. QEMU follows below truth table to select which payload to execute:</p>
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<table class="docutils align-default">
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<thead>
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<tr class="row-odd"><th class="head"><p>-bios</p></th>
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<th class="head"><p>-kernel</p></th>
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<th class="head"><p>payload</p></th>
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</tr>
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</thead>
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<tbody>
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<tr class="row-even"><td><p>N</p></td>
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<td><p>N</p></td>
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<td><p>u-boot</p></td>
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</tr>
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<tr class="row-odd"><td><p>N</p></td>
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<td><p>Y</p></td>
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<td><p>kernel</p></td>
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</tr>
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<tr class="row-even"><td><p>Y</p></td>
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<td><p>don’t care</p></td>
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<td><p>u-boot</p></td>
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</tr>
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</tbody>
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</table>
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<p>When both -bios and -kernel are present, QEMU loads U-Boot and U-Boot in turns
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automatically loads the kernel image specified by the -kernel parameter via
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U-Boot’s built-in “bootm” command, hence a legacy uImage format is required in
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such scenario.</p>
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||
</section>
|
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<section id="running-linux-kernel">
|
||
<h2>Running Linux kernel<a class="headerlink" href="#running-linux-kernel" title="Link to this heading"></a></h2>
|
||
<p>Linux mainline v5.11 release is tested at the time of writing. To build a
|
||
Linux mainline kernel that can be booted by the <code class="docutils literal notranslate"><span class="pre">ppce500</span></code> machine in
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64-bit mode, simply configure the kernel using the defconfig configuration:</p>
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<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span><span class="nb">export</span><span class="w"> </span><span class="nv">ARCH</span><span class="o">=</span>powerpc
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$<span class="w"> </span><span class="nb">export</span><span class="w"> </span><span class="nv">CROSS_COMPILE</span><span class="o">=</span>powerpc-linux-
|
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$<span class="w"> </span>make<span class="w"> </span>corenet64_smp_defconfig
|
||
$<span class="w"> </span>make<span class="w"> </span>menuconfig
|
||
</pre></div>
|
||
</div>
|
||
<p>then manually select the following configuration:</p>
|
||
<blockquote>
|
||
<div><p>Platform support > Freescale Book-E Machine Type > QEMU generic e500 platform</p>
|
||
</div></blockquote>
|
||
<p>To boot the newly built Linux kernel in QEMU with the <code class="docutils literal notranslate"><span class="pre">ppce500</span></code> machine:</p>
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||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>qemu-system-ppc64<span class="w"> </span>-M<span class="w"> </span>ppce500<span class="w"> </span>-cpu<span class="w"> </span>e5500<span class="w"> </span>-smp<span class="w"> </span><span class="m">4</span><span class="w"> </span>-m<span class="w"> </span>2G<span class="w"> </span><span class="se">\</span>
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||
<span class="w"> </span>-display<span class="w"> </span>none<span class="w"> </span>-serial<span class="w"> </span>stdio<span class="w"> </span><span class="se">\</span>
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||
<span class="w"> </span>-kernel<span class="w"> </span>vmlinux<span class="w"> </span><span class="se">\</span>
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<span class="w"> </span>-initrd<span class="w"> </span>/path/to/rootfs.cpio<span class="w"> </span><span class="se">\</span>
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<span class="w"> </span>-append<span class="w"> </span><span class="s2">"root=/dev/ram"</span>
|
||
</pre></div>
|
||
</div>
|
||
<p>To build a Linux mainline kernel that can be booted by the <code class="docutils literal notranslate"><span class="pre">ppce500</span></code> machine
|
||
in 32-bit mode, use the same 64-bit configuration steps except the defconfig
|
||
file should use corenet32_smp_defconfig.</p>
|
||
<p>To boot the 32-bit Linux kernel:</p>
|
||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>qemu-system-ppc64<span class="w"> </span>-M<span class="w"> </span>ppce500<span class="w"> </span>-cpu<span class="w"> </span>e500mc<span class="w"> </span>-smp<span class="w"> </span><span class="m">4</span><span class="w"> </span>-m<span class="w"> </span>2G<span class="w"> </span><span class="se">\</span>
|
||
<span class="w"> </span>-display<span class="w"> </span>none<span class="w"> </span>-serial<span class="w"> </span>stdio<span class="w"> </span><span class="se">\</span>
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<span class="w"> </span>-kernel<span class="w"> </span>vmlinux<span class="w"> </span><span class="se">\</span>
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<span class="w"> </span>-initrd<span class="w"> </span>/path/to/rootfs.cpio<span class="w"> </span><span class="se">\</span>
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<span class="w"> </span>-append<span class="w"> </span><span class="s2">"root=/dev/ram"</span>
|
||
</pre></div>
|
||
</div>
|
||
</section>
|
||
<section id="running-u-boot">
|
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<h2>Running U-Boot<a class="headerlink" href="#running-u-boot" title="Link to this heading"></a></h2>
|
||
<p>U-Boot mainline v2021.07 release is tested at the time of writing. To build a
|
||
U-Boot mainline bootloader that can be booted by the <code class="docutils literal notranslate"><span class="pre">ppce500</span></code> machine, use
|
||
the qemu-ppce500_defconfig with similar commands as described above for Linux:</p>
|
||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span><span class="nb">export</span><span class="w"> </span><span class="nv">CROSS_COMPILE</span><span class="o">=</span>powerpc-linux-
|
||
$<span class="w"> </span>make<span class="w"> </span>qemu-ppce500_defconfig
|
||
</pre></div>
|
||
</div>
|
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<p>You will get u-boot file in the build tree.</p>
|
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<p>When U-Boot boots, you will notice the following if using with <code class="docutils literal notranslate"><span class="pre">-cpu</span> <span class="pre">e6500</span></code>:</p>
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<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>CPU: Unknown, Version: 0.0, (0x00000000)
|
||
Core: e6500, Version: 2.0, (0x80400020)
|
||
</pre></div>
|
||
</div>
|
||
<p>This is because we only specified a core name to QEMU and it does not have a
|
||
meaningful SVR value which represents an actual SoC that integrates such core.
|
||
You can specify a real world SoC device that QEMU has built-in support but all
|
||
these SoCs are e500v2 based MPC85xx series, hence you cannot test anything
|
||
built for P4080 (e500mc), P5020 (e5500) and T2080 (e6500).</p>
|
||
</section>
|
||
<section id="networking">
|
||
<h2>Networking<a class="headerlink" href="#networking" title="Link to this heading"></a></h2>
|
||
<p>By default a VirtIO standard PCI networking device is connected as an ethernet
|
||
interface at PCI address 0.1.0, but we can switch that to an e1000 NIC by:</p>
|
||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>qemu-system-ppc64<span class="w"> </span>-M<span class="w"> </span>ppce500<span class="w"> </span>-smp<span class="w"> </span><span class="m">4</span><span class="w"> </span>-m<span class="w"> </span>2G<span class="w"> </span><span class="se">\</span>
|
||
<span class="w"> </span>-display<span class="w"> </span>none<span class="w"> </span>-serial<span class="w"> </span>stdio<span class="w"> </span><span class="se">\</span>
|
||
<span class="w"> </span>-bios<span class="w"> </span>u-boot<span class="w"> </span><span class="se">\</span>
|
||
<span class="w"> </span>-nic<span class="w"> </span>tap,ifname<span class="o">=</span>tap0,script<span class="o">=</span>no,downscript<span class="o">=</span>no,model<span class="o">=</span>e1000
|
||
</pre></div>
|
||
</div>
|
||
<p>The QEMU <code class="docutils literal notranslate"><span class="pre">ppce500</span></code> machine can also dynamically instantiate an eTSEC device
|
||
if “-device eTSEC” is given to QEMU:</p>
|
||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>-netdev<span class="w"> </span>tap,ifname<span class="o">=</span>tap0,script<span class="o">=</span>no,downscript<span class="o">=</span>no,id<span class="o">=</span>net0<span class="w"> </span>-device<span class="w"> </span>eTSEC,netdev<span class="o">=</span>net0
|
||
</pre></div>
|
||
</div>
|
||
</section>
|
||
<section id="root-file-system-on-flash-drive">
|
||
<h2>Root file system on flash drive<a class="headerlink" href="#root-file-system-on-flash-drive" title="Link to this heading"></a></h2>
|
||
<p>Rather than using a root file system on ram disk, it is possible to have it on
|
||
CFI flash. Given an ext2 image whose size must be a power of two, it can be used
|
||
as follows:</p>
|
||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>qemu-system-ppc64<span class="w"> </span>-M<span class="w"> </span>ppce500<span class="w"> </span>-cpu<span class="w"> </span>e500mc<span class="w"> </span>-smp<span class="w"> </span><span class="m">4</span><span class="w"> </span>-m<span class="w"> </span>2G<span class="w"> </span><span class="se">\</span>
|
||
<span class="w"> </span>-display<span class="w"> </span>none<span class="w"> </span>-serial<span class="w"> </span>stdio<span class="w"> </span><span class="se">\</span>
|
||
<span class="w"> </span>-kernel<span class="w"> </span>vmlinux<span class="w"> </span><span class="se">\</span>
|
||
<span class="w"> </span>-drive<span class="w"> </span><span class="k">if</span><span class="o">=</span>pflash,file<span class="o">=</span>/path/to/rootfs.ext2,format<span class="o">=</span>raw<span class="w"> </span><span class="se">\</span>
|
||
<span class="w"> </span>-append<span class="w"> </span><span class="s2">"rootwait root=/dev/mtdblock0"</span>
|
||
</pre></div>
|
||
</div>
|
||
<p>Alternatively, the root file system can also reside on an emulated SD card
|
||
whose size must again be a power of two:</p>
|
||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>$<span class="w"> </span>qemu-system-ppc64<span class="w"> </span>-M<span class="w"> </span>ppce500<span class="w"> </span>-cpu<span class="w"> </span>e500mc<span class="w"> </span>-smp<span class="w"> </span><span class="m">4</span><span class="w"> </span>-m<span class="w"> </span>2G<span class="w"> </span><span class="se">\</span>
|
||
<span class="w"> </span>-display<span class="w"> </span>none<span class="w"> </span>-serial<span class="w"> </span>stdio<span class="w"> </span><span class="se">\</span>
|
||
<span class="w"> </span>-kernel<span class="w"> </span>vmlinux<span class="w"> </span><span class="se">\</span>
|
||
<span class="w"> </span>-device<span class="w"> </span>sd-card,drive<span class="o">=</span>mydrive<span class="w"> </span><span class="se">\</span>
|
||
<span class="w"> </span>-drive<span class="w"> </span><span class="nv">id</span><span class="o">=</span>mydrive,if<span class="o">=</span>none,file<span class="o">=</span>/path/to/rootfs.ext2,format<span class="o">=</span>raw<span class="w"> </span><span class="se">\</span>
|
||
<span class="w"> </span>-append<span class="w"> </span><span class="s2">"rootwait root=/dev/mmcblk0"</span>
|
||
</pre></div>
|
||
</div>
|
||
</section>
|
||
</section>
|
||
|
||
|
||
</div>
|
||
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|
||
<footer><div class="rst-footer-buttons" role="navigation" aria-label="Footer">
|
||
<a href="powernv.html" class="btn btn-neutral float-left" title="PowerNV family boards (powernv8, powernv9, powernv10)" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left" aria-hidden="true"></span> Previous</a>
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|
||
|
||
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|
||
|
||
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|
||
<p>© Copyright 2025, The QEMU Project Developers.</p>
|
||
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|
||
|
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||
<p></p>
|
||
|
||
<p>This documentation is for QEMU version 8.2.2.</p>
|
||
|
||
|
||
<p><a href="../../about/license.html">QEMU and this manual are released under the
|
||
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||
|
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|
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|
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