Microblaze QEMU

anonymous@undisclosed.example.com (Anonymous) — Tue, 01 Sep 2020 08:59:14 +0000

2026/05/19 21:20	current
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	+	====== Microblaze QEMU ======
	+
	+
	+	* [[qemu:qemu:install\|Installation on host system]]
	+	* [[qemu:qemu:advance\|Qemu advance guide]]
	+
	+	===== What is QEMU? =====
	+
	+
	+	* Qemu manual http://www.nongnu.org/qemu/qemu-doc.html
	+	* Gitweb http://git.savannah.gnu.org/cgit/qemu.git
	+
	+
	+	===== Look at Qemu inside PetaLinux =====
	+
	+
	+	<html>
	+	<object width="640" height="505"><param name="movie" value="http://www.youtube.com/v/f3cC44OPZ1M&hl=en&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/KAg3vmkx9Yk&hl=en&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="640" height="505"></embed></object>
	+	</html>
	+
	+	<html>
	+	<object width="640" height="505"><param name="movie" value="http://www.youtube.com/v/f3cC44OPZ1M&hl=en&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/f3cC44OPZ1M&hl=en&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="640" height="505"></embed></object>
	+	</html>
	+
	+	===== Supported peripherals =====
	+	* Microblaze with/without MMU
	+	* timer
	+	* intc
	+	* uartlite
	+	* emaclite
	+	* ll_temac - testing phase - available only for customers
	+
	+	===== README =====
	+
	+	Files:
	+	.config kernelconfig for the vmlinux.nommu build.
	+	README
	+	mb.dtb The dtb passed to the guest kernel by QEMU.
	+	mb.dts Source for mb.dtb.
	+	vmlinux.mmu An MMU linux kernel build.
	+
	+	-------
	+
	+	To build the microblaze emulator do this:
	+
	+	$ git clone git://git.sv.gnu.org/qemu.git
	+	$ cd qemu
	+	$ ./configure --target-list=microblaze-linux-user,microblaze-softmmu
	+	$ make
	+
	+	After while you should have two binaries:
	+
	+	microblaze-linux-user/qemu-microblaze
	+	microblaze-softmmu/qemu-system-microblaze
	+
	+	I suggest copying them to /usr/local/bin/.
	+
	+	To emulate user-mode programs, use the linux-user version. I've provided
	+	sample programs for testing (just a cross compiled busybox installation).
	+	Please note that the QEMU linux user version cannot load FLAT binaries so
	+	the uclinux nommu user apps cannot be emulated at the moment.
	+
	+	$ qemu-microblaze -L busybox-root busybox-root/bin/echo microblaze
	+	microblaze
	+	$ qemu-microblaze -L busybox-root busybox-root/bin/vi
	+
	+	-----
	+
	+	System emulation expects to find a dtb file named mb.dtb on the current
	+	directory (hardcoded).
	+	I provided an mmu kernel and the dtb/dts files. Two try it out run qemu
	+	like this:
	+
	+	$ qemu-system-microblaze -kernel vmlinux.nommu -serial stdio -m 256 -s -append "rdinit=/bin/sh"
	+
	+	<!-- If you want to change gdb stub port -gdb tcp::9000-->
	+
	+	The black window that pops up is the QEMU console available for controlling
	+	QEMU itself.
	+	The emulation should bring you into a user-space shell waiting for input on
	+	your terminal. The console is over the emulated uartlite.
	+
	+	You can at any time attach with gdb:
	+	$ mb-linux-gdb -nw vmlinux.mmu
	+	GNU gdb 6.5.0.20060626-cvs
	+	Copyright (C) 2006 Free Software Foundation, Inc.
	+	GDB is free software, covered by the GNU General Public License, and you are
	+	welcome to change it and/or distribute copies of it under certain conditions.
	+	Type "show copying" to see the conditions.
	+	There is absolutely no warranty for GDB. Type "show warranty" for details.
	+	This GDB was configured as "--host=i686-pc-linux-gnu --target=microblaze-linux-gnu"...
	+	(gdb) target remote :1234
	+	Remote debugging using :1234
	+	[New thread 1]
	+	default_idle () at arch/microblaze/kernel/process.c:88
	+	88 cpu_relax();
	+	(gdb)
	+
	+	If you want to single-step the boot with gdb, pass the -S flag to qemu and it
	+	will wait for the debugger to attach before executing the first instruction.
	+
	+	-----
	+	GDB debugging in linux-user mode doesn't work at the moment.
	+
	+
	+
	+
	+	===== Run with cachegrind =====
	+
	+	* http://kcachegrind.sourceforge.net/html/Download.html
	+
	+
	+	./run-qemu.sh -d cachegrind
	+
	+	Analyze result
	+	kcachegrind cachegrind.out.qemu
	+
	+
	+	<!-- I just pushed a workaround, but the bug will still appear if
	+	you run with -d dcache or -d cachegrind. -->
	+

anonymous@undisclosed.example.com (Anonymous) — Tue, 01 Sep 2020 08:59:14 +0000

2026/05/19 21:20	current
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	+	/*
	+	<vote Qemu check=ip>
	+	Do you know what Qemu is?
	+	* yes
	+	* no
	+	</vote>

	+
	+	<vote Qemu check=ip>
	+	Do you use Qemu?
	+	* yes
	+	* no
	+	</vote>
	+
	+	*/

Microblaze Linux/Qemu/U-Boot wiki - qemu

Microblaze QEMU