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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/ia64/kernel/irq_lsapic.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/ia64/kernel/irq_lsapic.c')
-rw-r--r--arch/ia64/kernel/irq_lsapic.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/ia64/kernel/irq_lsapic.c b/arch/ia64/kernel/irq_lsapic.c
new file mode 100644
index 0000000000..23bf4499a7
--- /dev/null
+++ b/arch/ia64/kernel/irq_lsapic.c
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * LSAPIC Interrupt Controller
+ *
+ * This takes care of interrupts that are generated by the CPU's
+ * internal Streamlined Advanced Programmable Interrupt Controller
+ * (LSAPIC), such as the ITC and IPI interrupts.
+ *
+ * Copyright (C) 1999 VA Linux Systems
+ * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
+ * Copyright (C) 2000 Hewlett-Packard Co
+ * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
+ */
+
+#include <linux/sched.h>
+#include <linux/irq.h>
+
+static unsigned int
+lsapic_noop_startup (struct irq_data *data)
+{
+ return 0;
+}
+
+static void
+lsapic_noop (struct irq_data *data)
+{
+ /* nothing to do... */
+}
+
+static int lsapic_retrigger(struct irq_data *data)
+{
+ ia64_resend_irq(data->irq);
+
+ return 1;
+}
+
+struct irq_chip irq_type_ia64_lsapic = {
+ .name = "LSAPIC",
+ .irq_startup = lsapic_noop_startup,
+ .irq_shutdown = lsapic_noop,
+ .irq_enable = lsapic_noop,
+ .irq_disable = lsapic_noop,
+ .irq_ack = lsapic_noop,
+ .irq_retrigger = lsapic_retrigger,
+};