summaryrefslogtreecommitdiffstats
path: root/arch/m68k/sun3/sun3ints.c
diff options
context:
space:
mode:
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/m68k/sun3/sun3ints.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/m68k/sun3/sun3ints.c')
-rw-r--r--arch/m68k/sun3/sun3ints.c100
1 files changed, 100 insertions, 0 deletions
diff --git a/arch/m68k/sun3/sun3ints.c b/arch/m68k/sun3/sun3ints.c
new file mode 100644
index 0000000000..36cc280a45
--- /dev/null
+++ b/arch/m68k/sun3/sun3ints.c
@@ -0,0 +1,100 @@
+ /*
+ * linux/arch/m68k/sun3/sun3ints.c -- Sun-3(x) Linux interrupt handling code
+ *
+ * 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.
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <linux/interrupt.h>
+#include <asm/intersil.h>
+#include <asm/oplib.h>
+#include <asm/sun3ints.h>
+#include <asm/irq_regs.h>
+#include <linux/seq_file.h>
+
+extern void sun3_leds (unsigned char);
+
+void sun3_disable_interrupts(void)
+{
+ sun3_disable_irq(0);
+}
+
+void sun3_enable_interrupts(void)
+{
+ sun3_enable_irq(0);
+}
+
+static int led_pattern[8] = {
+ ~(0x80), ~(0x01),
+ ~(0x40), ~(0x02),
+ ~(0x20), ~(0x04),
+ ~(0x10), ~(0x08)
+};
+
+volatile unsigned char* sun3_intreg;
+
+void sun3_enable_irq(unsigned int irq)
+{
+ *sun3_intreg |= (1 << irq);
+}
+
+void sun3_disable_irq(unsigned int irq)
+{
+ *sun3_intreg &= ~(1 << irq);
+}
+
+static irqreturn_t sun3_int7(int irq, void *dev_id)
+{
+ unsigned int cnt;
+
+ cnt = kstat_irqs_cpu(irq, 0);
+ if (!(cnt % 2000))
+ sun3_leds(led_pattern[cnt % 16000 / 2000]);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t sun3_int5(int irq, void *dev_id)
+{
+ unsigned long flags;
+ unsigned int cnt;
+
+ local_irq_save(flags);
+#ifdef CONFIG_SUN3
+ intersil_clear();
+#endif
+ sun3_disable_irq(5);
+ sun3_enable_irq(5);
+#ifdef CONFIG_SUN3
+ intersil_clear();
+#endif
+ legacy_timer_tick(1);
+ cnt = kstat_irqs_cpu(irq, 0);
+ if (!(cnt % 20))
+ sun3_leds(led_pattern[cnt % 160 / 20]);
+ local_irq_restore(flags);
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t sun3_vec255(int irq, void *dev_id)
+{
+ return IRQ_HANDLED;
+}
+
+void __init sun3_init_IRQ(void)
+{
+ *sun3_intreg = 1;
+
+ m68k_setup_user_interrupt(VEC_USER, 128);
+
+ if (request_irq(IRQ_AUTO_5, sun3_int5, 0, "clock", NULL))
+ pr_err("Couldn't register %s interrupt\n", "int5");
+ if (request_irq(IRQ_AUTO_7, sun3_int7, 0, "nmi", NULL))
+ pr_err("Couldn't register %s interrupt\n", "int7");
+ if (request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL))
+ pr_err("Couldn't register %s interrupt\n", "vec255");
+}