On Jul 13, 2012, at 5:40 PM, Timur Tabi wrote: > We only need two examples of CAMP device trees in the upstream kernel. > > Co-operative Asymmetric Multi-Processing (CAMP) is a technique where two > or more operating systems (typically multiple copies of the same Linux kernel) > are loaded into memory, and each kernel is given a subset of the available > cores to execute on. For example, on a four-core system, one kernel runs on > cores 0 and 1, and the other runs on cores 2 and 3. > > The devices are also partitioned among the operating systems, and this is > done with customized device trees. Each kernel gets its own device tree > that has only the devices that it should know about. > > Unfortunately, this approach is very hackish. The kernels are trusted to > only access devices in their respective device trees, and the partitioning > only works for devices that can be handled. Crafting the device trees is a > tricky process, and getting U-Boot to load and start all kernels is > cumbersome. > > But most importantly, each CAMP setup is very application-specific, since > the actual partitioning of resources is done in the DTS by the system > designer. Therefore, it doesn't make a lot of sense to have a lot of CAMP > device trees, since we only expect them to be used as examples. > > Signed-off-by: Timur Tabi <ti...@freescale.com> > --- > arch/powerpc/boot/dts/p1020rdb_camp_core0.dts | 63 ----------- > arch/powerpc/boot/dts/p1020rdb_camp_core1.dts | 141 ------------------------- > arch/powerpc/boot/dts/p2020rdb_camp_core0.dts | 67 ------------ > arch/powerpc/boot/dts/p2020rdb_camp_core1.dts | 125 ---------------------- > 4 files changed, 0 insertions(+), 396 deletions(-) > delete mode 100644 arch/powerpc/boot/dts/p1020rdb_camp_core0.dts > delete mode 100644 arch/powerpc/boot/dts/p1020rdb_camp_core1.dts > delete mode 100644 arch/powerpc/boot/dts/p2020rdb_camp_core0.dts > delete mode 100644 arch/powerpc/boot/dts/p2020rdb_camp_core1.dts
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