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<title>change log for rtems (2011-07-18)</title>
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<font color='#bb2222'><strong>strauman</strong></font>
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<tr><td colspan='3' bgcolor='#dddddd'><pre>2011-07-18 Till Straumann <strauman@slac.stanford.edu>
* README.qemu: added.
</pre></td></tr>
<tr><td width='1%'><a href="http://www.rtems.com/cgi-bin/viewcvs.cgi//rtems/c/src/lib/libbsp/powerpc/motorola_powerpc/ChangeLog.diff?r1=text&tr1=1.164&r2=text&tr2=1.165&diff_format=h">M</a></td><td width='1%'>1.165</td><td width='100%'>c/src/lib/libbsp/powerpc/motorola_powerpc/ChangeLog</td></tr>
<tr><td width='1%'><a href="http://www.rtems.com/cgi-bin/viewcvs.cgi//rtems/c/src/lib/libbsp/powerpc/motorola_powerpc/README.qemu?rev=1.1&content-type=text/vnd.viewcvs-markup">A</a></td><td width='1%'><font color="#000088">1.1</font></td><td width='100%'><font color="#000088">c/src/lib/libbsp/powerpc/motorola_powerpc/README.qemu</font></td></tr>
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<font color='#006600'>diff -u rtems/c/src/lib/libbsp/powerpc/motorola_powerpc/ChangeLog:1.164 rtems/c/src/lib/libbsp/powerpc/motorola_powerpc/ChangeLog:1.165
--- rtems/c/src/lib/libbsp/powerpc/motorola_powerpc/ChangeLog:1.164 Mon Jul 18 11:32:29 2011
+++ rtems/c/src/lib/libbsp/powerpc/motorola_powerpc/ChangeLog Mon Jul 18 12:40:55 2011
</font><font color='#997700'>@@ -1,16 +1,17 @@
</font> 2011-07-18 Till Straumann <strauman@slac.stanford.edu>
<font color='#880000'>- * motorola_powerpc/make/custom/qemuprep-altivec.cfg,
- motorola_powerpc/Makefile.am: added altivec-enabled variant.
</font><font color='#000088'>+ * README.qemu: added.
+
+2011-07-18 Till Straumann <strauman@slac.stanford.edu>
+
+ * make/custom/qemuprep-altivec.cfg, Makefile.am:
+ added altivec-enabled variant 'qemuprep-altivec'.
</font>
2011-07-15 Till Straumann <strauman@slac.stanford.edu>
<font color='#880000'>- * motorola_powerpc/Makefile.am,
- motorola_powerpc/configure.ac, motorola_powerpc/preinstall.am,
- motorola_powerpc/include/bsp.h, motorola_powerpc/make/custom/qemuprep.cfg,
- motorola_powerpc/qemu_fakerom/Makefile.am,
- motorola_powerpc/qemu_fakerom/.cvsignore:
- Added 'qemuprep' BSP variant.
</font><font color='#000088'>+ * Makefile.am, configure.ac, preinstall.am, include/bsp.h,
+ make/custom/qemuprep.cfg, qemu_fakerom/Makefile.am,
+ qemu_fakerom/.cvsignore: Added 'qemuprep' BSP variant.
</font>
2011-06-18 Ralf Corsépius <ralf.corsepius@rtems.org>
<font color='#006600'>diff -u /dev/null rtems/c/src/lib/libbsp/powerpc/motorola_powerpc/README.qemu:1.1
--- /dev/null Mon Jul 18 13:11:21 2011
+++ rtems/c/src/lib/libbsp/powerpc/motorola_powerpc/README.qemu Mon Jul 18 12:40:55 2011
</font><font color='#997700'>@@ -0,0 +1,119 @@
</font><font color='#000088'>+The 'qemuprep'/'qemuprep-altivec' BSPs are variants of
+'motorola_powerpc' that can run under QEMU. They are *not*
+binary compatible with other variants of 'motorola_powerpc'
+(nor with each other).
+
+Most significant differences to real hardware:
+ - no OpenPIC, just a 8259 PIC (even though qemu implements an openpic
+ at least to some extent it is not configured into the prep platform
+ as of qemu-0.14.1).
+ - no VME (absense of the VME controller is detected by the BSP)
+ - the only network chip supported by both, qemu and vanilla RTEMS
+ is the ISA NE2000 controller. Note that the default interrupt line
+ settings used by RTEMS and QEMU differ: RTEMS uses 5 and QEMU 9.
+ This can be addressed by passing a RTEMS commandline option
+ --ne2k-irq=9.
+ Other controllers (i8559, e1000, pcnet) implemented by qemu can
+ also be used but require unbundled RTEMS drivers (libbsdport).
+ Note that the bundled 'if_fxp' has not been ported to PPC and works
+ on x86 only.
+ - unlike a real motorola board you can run qemu emulating a 7400 CPU
+ which features altivec. I.e., you can use this BSP (altivec-enabled
+ variant) to test altivec-enabled code.
+
+Compatibility: qemu had quite a few bugs related to the PREP platform.
+Version 0.12.4, for example, required patches. 0.14.1 seems to have
+fixed the show-stoppers. Hence, you *need* at least qemu-0.14.1 for
+this BSP; it should work without the need for patching QEMU.
+
+BIOS: qemu requires you to use a BIOS. The one that came with qemu
+0.12.4 didn't work for me so I created a minimal dummy that provides
+enough functionality for the RTEMS bootloader to work.
+
+BSP Variants:
+You can compile the BSP for either a 604 CPU or a 7400 (altivec-enabled).
+Note that you cannot run the altivec-enabled BSP variant on a CPU w/o
+altivec/SIMD hardware. The non-altivec variant is called 'qemuprep'
+and the altivec-enabled one 'qemuprep-altivec'. Hence, you can
+configure RTEMS:
+
+604/non-altivec variant only:
+ configure --target=powerpc-rtems --enable-rtemsbsp=qemuprep
+7400/altivec variant only:
+ configure --target=powerpc-rtems --enable-rtemsbsp=qemuprep-altivec
+both variants:
+ configure --target=powerpc-rtems --enable-rtemsbsp='qemuprep qemuprep-altivec'
+
+Building QEMU:
+In case you have no pre-built qemu-0.14.1 you can
+compile it yourself:
+
+cd qemu-0.14.1
+configure --target-list=ppc-softmmu
+make
+
+Running QEMU:
+A number of command-line options are important (BTW: make sure
+you run the PPC/PREP emulator and not a natively installed i386/PC
+emulating 'qemu')
+
+-M prep --- select machine type: prep
+-cpu 604 --- select 604 CPU for non-altivec variant
+-cpu 7400 --- select 7400 CPU for altivec variant
+
+ NOTE: the 7455 and 7457 emulations are buggy as of
+ qemu-0.14.1 and they won't work.
+
+-bios <rtems-install-prefix>/powerpc-rtems/qemuprep/qemu_fakerom.bin
+-bios <rtems-install-prefix>/powerpc-rtems/qemuprep-altivec/qemu_fakerom.bin
+ --- select proprietary dummy 'BIOS'
+
+-nographic --- redirect serial/IO to console where qemu is run
+
+-kernel <path> --- path to your RTEMS executable (.ralf file, e.g., 'hello.ralf')
+-no-reboot --- terminate after one run
+-append <arg> --- RTEMS kernel comand line (use e.g., to modify
+ ne2000 driver interrupt line)
+
+Networking:
+(We assume your RTEMS application is correctly configured and
+built for networking using the ne2k adapter [other adapters<span style="background-color: #FF0000"> </span>
+can be used with unbundled/libbsdport drivers])
+
+I use networking with a 'tap' interface on the host machine
+and can then communicate with the emulated target in any
+desired way.
+
+On (linux) host:
+
+# create a 'permanent' tap device that can be used by myself
+# (as non-root user).
+sudo tunctl -u `id -u`
+# configure tap0 interface
+sudo ifconfig tap0 10.1.1.1 netmask 255.255.255.0 up
+# provide a suitable dhcpd config file (for the emulated
+# platform to boot: IP address etc.
+#
+# execute dhcp on host
+sudo dhcpd -d tap0
+
+Start emulated prep platform:
+
+ppc-softmmu/qemu-system-ppc \
+ -M prep \
+ -cpu 7400 \
+ -bios <rtems-prefix>/powerpc-rtems/qemuprep-altivec/lib/qemu_fakerom.bin \
+ -kernel <my_path>/my_app.ralf \
+ -append --ne2k-irq=9 \
+ -nographic \
+ -no-reboot \
+ -net nic,model=ne2k_isa \
+ -net tap,vlan=0,ifname=tap0,script=no,downscript=no<span style="background-color: #FF0000"> </span>
+
+Again: if you use the non-altivec BSP variant, use -cpu 604
+and if you use the altivec-enabled variant then you MUST use
+-cpu 7400.
+
+Have fun.
+
+Till Straumann, 2011/07/18
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