# HG changeset patch
# User Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
# Node ID a2d836b6ab41c273826bfba8ebe30ac63f153e93
# Parent 199b457c43256143561ea7943d40ce72713c73b0
[POWERPC][XEN] Make MPIC sharing between Xen and Dom0 optional
Tho right now it is the only option.
Signed-off-by: Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
---
arch/powerpc/platforms/xen/evtchn.c | 36 +++++++++++++++++++++---------------
arch/powerpc/platforms/xen/setup.c | 5 +++++
2 files changed, 26 insertions(+), 15 deletions(-)
diff -r 199b457c4325 -r a2d836b6ab41 arch/powerpc/platforms/xen/evtchn.c
--- a/arch/powerpc/platforms/xen/evtchn.c Mon Aug 28 18:43:52 2006 -0500
+++ b/arch/powerpc/platforms/xen/evtchn.c Thu Aug 31 17:47:08 2006 -0400
@@ -1,4 +1,3 @@
-
#define DEBUG
#include <linux/module.h>
@@ -16,8 +15,10 @@
#endif
/*
- * We are currently letting Dom0 control the mpic. However, Xen will
- * Ack all interrupts. Here is how it works:
+ * The following code, shares the MPIV controller between Xen and
+ * Dom0. However, Xen will Ack all interrupts. Here is how it works:
+ * the controlling of the PIC with Dom0. However, Xen will Ack all
+ * interrupts. Here is how it works:
*
* 1. Dom0 sees a device and uses the and requests that Xen binds
* the IRQ to it.
@@ -32,12 +33,6 @@ struct hw_interrupt_type *xen_pirq;
struct hw_interrupt_type *xen_pirq;
static struct hw_interrupt_type hc_irq;
extern struct machdep_calls mach_maple_md;
-
-int xen_get_irq(struct pt_regs *regs)
-{
- evtchn_do_upcall(regs);
- return -1;
-}
static unsigned int xen_startup_irq(unsigned int irq)
{
@@ -80,14 +75,9 @@ static inline struct mpic *mpic_from_irq
return container_of(irq_desc[irq].chip, struct mpic, hc_irq);
}
-void xen_maple_init_IRQ(void)
+static void xen_share_pic(void)
{
struct mpic *mpic;
-
- xen_init_IRQ();
-
- if (!(xen_start_info->flags & SIF_INITDOMAIN))
- return;
xen_pirq = irq_desc[0].chip;
mach_maple_md.init_IRQ();
@@ -112,5 +102,21 @@ void xen_maple_init_IRQ(void)
hc_irq.end = mpic->hc_irq.end;
mpic->hc_irq.end = xen_end_irq;
+}
+void xen_maple_init_IRQ(void)
+{
+ xen_init_IRQ();
+
+ if (!(xen_start_info->flags & SIF_INITDOMAIN))
+ return;
+
+ printk("Sharing PIC with Xen");
+ xen_share_pic();
}
+
+int xen_get_irq(struct pt_regs *regs)
+{
+ evtchn_do_upcall(regs);
+ return -1;
+}
diff -r 199b457c4325 -r a2d836b6ab41 arch/powerpc/platforms/xen/setup.c
--- a/arch/powerpc/platforms/xen/setup.c Mon Aug 28 18:43:52 2006 -0500
+++ b/arch/powerpc/platforms/xen/setup.c Thu Aug 31 17:47:08 2006 -0400
@@ -1,6 +1,7 @@
#define DEBUG
#undef XENPPC_USE_IDLE
+#define CONFIG_SHARE_MPIC
#include <linux/module.h>
#include <linux/rwsem.h>
@@ -298,7 +299,11 @@ define_machine(xen) {
.probe = xen_probe,
.setup_arch = xen_setup_arch,
.init_early = xen_init_early,
+#ifdef CONFIG_SHARE_MPIC
.init_IRQ = xen_maple_init_IRQ,
+#else
+ .init_IRQ = xen_init_IRQ,
+#endif
.get_irq = xen_get_irq,
.get_boot_time = 0,
.set_rtc_time = 0,
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