From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:49:45 +0200
Subject: Adding upstream version 6.1.76.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 arch/mips/cobalt/irq.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 arch/mips/cobalt/irq.c

(limited to 'arch/mips/cobalt/irq.c')

diff --git a/arch/mips/cobalt/irq.c b/arch/mips/cobalt/irq.c
new file mode 100644
index 000000000..ead5ae413
--- /dev/null
+++ b/arch/mips/cobalt/irq.c
@@ -0,0 +1,64 @@
+/*
+ * IRQ vector handles
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1995, 1996, 1997, 2003 by Ralf Baechle
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+
+#include <asm/i8259.h>
+#include <asm/irq_cpu.h>
+#include <asm/irq_gt641xx.h>
+#include <asm/gt64120.h>
+
+#include <irq.h>
+
+asmlinkage void plat_irq_dispatch(void)
+{
+	unsigned pending = read_c0_status() & read_c0_cause() & ST0_IM;
+	int irq;
+
+	if (pending & CAUSEF_IP2)
+		gt641xx_irq_dispatch();
+	else if (pending & CAUSEF_IP6) {
+		irq = i8259_irq();
+		if (irq < 0)
+			spurious_interrupt();
+		else
+			do_IRQ(irq);
+	} else if (pending & CAUSEF_IP3)
+		do_IRQ(MIPS_CPU_IRQ_BASE + 3);
+	else if (pending & CAUSEF_IP4)
+		do_IRQ(MIPS_CPU_IRQ_BASE + 4);
+	else if (pending & CAUSEF_IP5)
+		do_IRQ(MIPS_CPU_IRQ_BASE + 5);
+	else if (pending & CAUSEF_IP7)
+		do_IRQ(MIPS_CPU_IRQ_BASE + 7);
+	else
+		spurious_interrupt();
+}
+
+void __init arch_init_irq(void)
+{
+	mips_cpu_irq_init();
+	gt641xx_irq_init();
+	init_i8259_irqs();
+
+	if (request_irq(GT641XX_CASCADE_IRQ, no_action, IRQF_NO_THREAD,
+			"cascade", NULL)) {
+		pr_err("Failed to request irq %d (cascade)\n",
+		       GT641XX_CASCADE_IRQ);
+	}
+	if (request_irq(I8259_CASCADE_IRQ, no_action, IRQF_NO_THREAD,
+			"cascade", NULL)) {
+		pr_err("Failed to request irq %d (cascade)\n",
+		       I8259_CASCADE_IRQ);
+	}
+}
-- 
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