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[POWERPC] MPIC: support more than 256 sources

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Allow more than the default 256 MPIC sources. Allocates a new flag
(MPIC_LARGE_VECTORS) to be used by platform code when instantiating
the mpic.

I picked 11 bits worth right now since it would cover the number of
sources on any hardware I have seen. It can always be increased later
if needed.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Olof Johansson
2007-01-28 23:33:18 -06:00
committed by Paul Mackerras
parent 6529c13dfe
commit 7df2457db8
3 changed files with 55 additions and 40 deletions
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5
arch/powerpc/platforms/pasemi/setup.c
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@@ -130,8 +130,9 @@ static __init void pas_init_IRQ(void)
openpic_addr = of_read_number(opprop, naddr);
printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
mpic = mpic_alloc(mpic_node, openpic_addr, MPIC_PRIMARY, 0, 0,
" PAS-OPIC ");
mpic = mpic_alloc(mpic_node, openpic_addr,
MPIC_PRIMARY|MPIC_LARGE_VECTORS,
0, 0, " PAS-OPIC ");
BUG_ON(!mpic);
mpic_assign_isu(mpic, 0, openpic_addr + 0x10000);