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authorHelge Deller <deller@gmx.de>2018-01-12 22:51:22 +0100
committerHelge Deller <deller@gmx.de>2018-03-02 10:04:46 +0100
commit0ed1fe4ad394e54783bbffa84102faf435661a2e (patch)
tree97a87552f61c8f9575e10dc9f46fbed93d0ce893 /arch/parisc/kernel/time.c
parentparisc: Hide virtual kernel memory layout (diff)
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parisc: Check if secondary CPUs want own PDC calls
The architecture specification says (for 64-bit systems): PDC is a per processor resource, and operating system software must be prepared to manage separate pointers to PDCE_PROC for each processor. The address of PDCE_PROC for the monarch processor is stored in the Page Zero location MEM_PDC. The address of PDCE_PROC for each non-monarch processor is passed in gr26 when PDCE_RESET invokes OS_RENDEZ. Currently we still use one PDC for all CPUs, but in case we face a machine which is following the specification let's warn about it. Signed-off-by: Helge Deller <deller@gmx.de>
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