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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2006-11-11 17:24:58 +1100
committerPaul Mackerras <paulus@samba.org>2006-12-04 16:08:46 +1100
commit21fb5a1d9f554970c680b801ba32184bc7c34aa0 (patch)
tree64ef24883be6e92e46327d681efa9cc622a5465c /arch/powerpc
parenta959ff56bbf07954ea4fa1cf72f99a38795eadb3 (diff)
[POWERPC] Native cell support for MPIC in southbridge
Add support for southbridges using the MPIC interrupt controller to the native cell platforms. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/Kconfig1
-rw-r--r--arch/powerpc/platforms/cell/setup.c44
2 files changed, 45 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 0e564d30fc4..65588a6bd2f 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -469,6 +469,7 @@ config PPC_CELL_NATIVE
bool
select PPC_CELL
select PPC_DCR_MMIO
+ select MPIC
default n
config PPC_IBM_CELL_BLADE
diff --git a/arch/powerpc/platforms/cell/setup.c b/arch/powerpc/platforms/cell/setup.c
index 1944bb413f0..13f628def36 100644
--- a/arch/powerpc/platforms/cell/setup.c
+++ b/arch/powerpc/platforms/cell/setup.c
@@ -50,6 +50,7 @@
#include <asm/spu.h>
#include <asm/spu_priv1.h>
#include <asm/udbg.h>
+#include <asm/mpic.h>
#include "interrupt.h"
#include "iommu.h"
@@ -80,10 +81,53 @@ static void cell_progress(char *s, unsigned short hex)
printk("*** %04x : %s\n", hex, s ? s : "");
}
+static void cell_mpic_cascade(unsigned int irq, struct irq_desc *desc)
+{
+ struct mpic *mpic = desc->handler_data;
+ unsigned int virq;
+
+ virq = mpic_get_one_irq(mpic);
+ if (virq != NO_IRQ)
+ generic_handle_irq(virq);
+ desc->chip->eoi(irq);
+}
+
+static void __init mpic_init_IRQ(void)
+{
+ struct device_node *dn;
+ struct mpic *mpic;
+ unsigned int virq;
+
+ for (dn = NULL;
+ (dn = of_find_node_by_name(dn, "interrupt-controller"));) {
+ if (!device_is_compatible(dn, "CBEA,platform-open-pic"))
+ continue;
+
+ /* The MPIC driver will get everything it needs from the
+ * device-tree, just pass 0 to all arguments
+ */
+ mpic = mpic_alloc(dn, 0, 0, 0, 0, " MPIC ");
+ if (mpic == NULL)
+ continue;
+ mpic_init(mpic);
+
+ virq = irq_of_parse_and_map(dn, 0);
+ if (virq == NO_IRQ)
+ continue;
+
+ printk(KERN_INFO "%s : hooking up to IRQ %d\n",
+ dn->full_name, virq);
+ set_irq_data(virq, mpic);
+ set_irq_chained_handler(virq, cell_mpic_cascade);
+ }
+}
+
+
static void __init cell_init_irq(void)
{
iic_init_IRQ();
spider_init_IRQ();
+ mpic_init_IRQ();
}
static void __init cell_setup_arch(void)