path: root/arch/powerpc/platforms/cell/spider-pic.c
diff options
authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2006-09-29 15:00:29 +1000
committerPaul Mackerras <paulus@samba.org>2006-10-04 14:52:08 +1000
commit2e194583125bfea94d1ceaa6a32e891643befa7d (patch)
treeedcd8ee247c244727cc828582591fea26c7cd83b /arch/powerpc/platforms/cell/spider-pic.c
parentf3c87a8999c28f2948ebd407574f7e9fb5c577b2 (diff)
[POWERPC] Cell interrupt rework
This patch reworks the cell iic interrupt handling so that: - Node ID is back in the interrupt number (only one IRQ host is created for all nodes). This allows interrupts from sources on another node to be routed non-locally. This will allow possibly one day to fix maxcpus=1 or 2 and still get interrupts from devices on BE 1. (A bit more fixing is needed for that) and it will allow us to implement actual affinity control of external interrupts. - Added handling of the IO exceptions interrupts (badly named, but I re-used the name initially used by STI). Those are the interrupts exposed by IIC_ISR and IIC_IRR, such as the IOC translation exception, performance monitor, etc... Those get their special numbers in the IRQ number space and are internally implemented as a cascade on unit 0xe, class 1 of each node. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/cell/spider-pic.c')
1 files changed, 4 insertions, 5 deletions
diff --git a/arch/powerpc/platforms/cell/spider-pic.c b/arch/powerpc/platforms/cell/spider-pic.c
index 742a03282b44..608b1ebc56b2 100644
--- a/arch/powerpc/platforms/cell/spider-pic.c
+++ b/arch/powerpc/platforms/cell/spider-pic.c
@@ -243,7 +243,6 @@ static unsigned int __init spider_find_cascade_and_node(struct spider_pic *pic)
const u32 *imap, *tmp;
int imaplen, intsize, unit;
struct device_node *iic;
- struct irq_host *iic_host;
#if 0 /* Enable that when we have a way to retreive the node as well */
/* First, we check wether we have a real "interrupts" in the device
@@ -289,11 +288,11 @@ static unsigned int __init spider_find_cascade_and_node(struct spider_pic *pic)
* the iic host from the iic OF node, but that way I'm still compatible
* with really really old old firmwares for which we don't have a node
- iic_host = iic_get_irq_host(pic->node_id);
- if (iic_host == NULL)
- return NO_IRQ;
/* Manufacture an IIC interrupt number of class 2 */
- virq = irq_create_mapping(iic_host, 0x20 | unit);
+ virq = irq_create_mapping(NULL,
+ (pic->node_id << IIC_IRQ_NODE_SHIFT) |
+ unit);
if (virq == NO_IRQ)
printk(KERN_ERR "spider_pic: failed to map cascade !");
return virq;

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