On Tue, Mar 27, 2012 at 03:59:48PM -0500, Scott Wood wrote:
On 03/27/2012 03:53 PM, Wolfgang Denk wrote:
Dear Frank,
In message CADNf2sxrQFDU0LLQWp5huRGgQiKbaLik1+2C=Oj=gjORP6XacA@mail.gmail.com you wrote:
I'm trying to figure out if anyone has ported a PPC system to QEMU that is capable of booting U-Boot. Similar to the ARM versatilepb target, but for PPC instead. I've tried the Bamboo and MPC8544DS but it seems they only use stubs to OS calls and parses a DTB for info.
Did you check which configurations the Yocto project are using? They provide qemu based emulations for ARM, MIPS, PPC and x86, and I would be really surprised if the ARM and PPC configs were not based on U-Boot ... [ARM: beagleboard; PPC: mpc8315e-rdb; MIPS: routerstationpro]
I'm not familiar with what Yocto does, but at least for Freescale PPC chips QEMU does not emulate enough of the hardware to run U-Boot (at least, not without significant U-Boot hacking that I'm not aware of anyone having done). QEMU loads Linux directly.
Putting my OE-guy hat on, the qemu-ppc target used is 'mac99'. It was switched over from prep back in January of this year. From my own past diggings, there's not really a newer machine option as all of the support added to qemu from Freescale and IBM has been kvm-oriented rather than full machine emulation oriented. So to run U-Boot under qemu on a BE machine, you'd need to port U-Boot over. Or, build the sandbox arch on a BE host, such as Linux running under qemu-ppc. Then it should be BE, yes?