• Michael Ellerman's avatar
    [POWERPC] MPIC U3/U4 MSI backend · 05af7bd2
    Michael Ellerman authored
    MPIC U3/U4 MSI backend. Based on code from Segher, heavily hacked by me.
    This only deals with MSI on U3/U4 MPICs, aka. CPC 9x5.
    
    If we find a U3/U4 then we enable this backend, ie. take over the ppc_md
    MSI hooks. We might need more elaborate logic in future to decide which
    backend is enabled.
    
    We need our own irq_chip so that we can do MSI masking/unmasking on
    the device itself. We also need to mask explicitly on shutdown to make
    sure we don't get bitten by lazy-disable semantics.
    Signed-off-by: default avatarMichael Ellerman <michael@ellerman.id.au>
    Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
    05af7bd2
mpic.c 39.2 KB