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Diffstat (limited to 'arch/powerpc/platforms/pseries/xics.c')
-rw-r--r--arch/powerpc/platforms/pseries/xics.c43
1 files changed, 34 insertions, 9 deletions
diff --git a/arch/powerpc/platforms/pseries/xics.c b/arch/powerpc/platforms/pseries/xics.c
index 424b335a71c8..84e058f1e1cc 100644
--- a/arch/powerpc/platforms/pseries/xics.c
+++ b/arch/powerpc/platforms/pseries/xics.c
@@ -579,7 +579,7 @@ static void xics_update_irq_servers(void)
int i, j;
struct device_node *np;
u32 ilen;
- const u32 *ireg, *isize;
+ const u32 *ireg;
u32 hcpuid;
/* Find the server numbers for the boot cpu. */
@@ -607,11 +607,6 @@ static void xics_update_irq_servers(void)
}
}
- /* get the bit size of server numbers */
- isize = of_get_property(np, "ibm,interrupt-server#-size", NULL);
- if (isize)
- interrupt_server_size = *isize;
-
of_node_put(np);
}
@@ -682,6 +677,7 @@ void __init xics_init_IRQ(void)
struct device_node *np;
u32 indx = 0;
int found = 0;
+ const u32 *isize;
ppc64_boot_msg(0x20, "XICS Init");
@@ -701,6 +697,26 @@ void __init xics_init_IRQ(void)
if (found == 0)
return;
+ /* get the bit size of server numbers */
+ found = 0;
+
+ for_each_compatible_node(np, NULL, "ibm,ppc-xics") {
+ isize = of_get_property(np, "ibm,interrupt-server#-size", NULL);
+
+ if (!isize)
+ continue;
+
+ if (!found) {
+ interrupt_server_size = *isize;
+ found = 1;
+ } else if (*isize != interrupt_server_size) {
+ printk(KERN_WARNING "XICS: "
+ "mismatched ibm,interrupt-server#-size\n");
+ interrupt_server_size = max(*isize,
+ interrupt_server_size);
+ }
+ }
+
xics_update_irq_servers();
xics_init_host();
@@ -728,9 +744,18 @@ static void xics_set_cpu_priority(unsigned char cppr)
/* Have the calling processor join or leave the specified global queue */
static void xics_set_cpu_giq(unsigned int gserver, unsigned int join)
{
- int status = rtas_set_indicator_fast(GLOBAL_INTERRUPT_QUEUE,
- (1UL << interrupt_server_size) - 1 - gserver, join);
- WARN_ON(status < 0);
+ int index;
+ int status;
+
+ if (!rtas_indicator_present(GLOBAL_INTERRUPT_QUEUE, NULL))
+ return;
+
+ index = (1UL << interrupt_server_size) - 1 - gserver;
+
+ status = rtas_set_indicator_fast(GLOBAL_INTERRUPT_QUEUE, index, join);
+
+ WARN(status < 0, "set-indicator(%d, %d, %u) returned %d\n",
+ GLOBAL_INTERRUPT_QUEUE, index, join, status);
}
void xics_setup_cpu(void)