kernel.git/arch/powerpc/kernel/dbell.c, branch linux-2.6.34.yHosts the 0x221E linux distro kernel.
https://git.0xinfinity.dev/distro/kernel.git/atom?h=linux-2.6.34.y2009-02-23T04:53:03Zpowerpc: Add support for using doorbells for SMP IPI2009-02-23T04:53:03ZKumar Gala2009-02-12T13:54:53Zurn:sha1:620165f971753c2c451c880796bac7cd66f3534a
The e500mc supports the new msgsnd/doorbell mechanisms that were added in
the Power ISA 2.05 architecture. We use the normal level doorbell for
doing SMP IPIs at this point.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>