Signed-off-by: Guo Ren <[email protected]>
---
arch/csky/include/asm/irq.h | 12 +++++++++
arch/csky/include/asm/irqflags.h | 55 ++++++++++++++++++++++++++++++++++++++++
arch/csky/kernel/irq.c | 41 ++++++++++++++++++++++++++++++
3 files changed, 108 insertions(+)
create mode 100644 arch/csky/include/asm/irq.h
create mode 100644 arch/csky/include/asm/irqflags.h
create mode 100644 arch/csky/kernel/irq.c
diff --git a/arch/csky/include/asm/irq.h b/arch/csky/include/asm/irq.h
new file mode 100644
index 0000000..f68e868
--- /dev/null
+++ b/arch/csky/include/asm/irq.h
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
+#ifndef __ASM_CSKY_IRQ_H
+#define __ASM_CSKY_IRQ_H
+
+#define NR_IRQS CONFIG_CSKY_NR_IRQS
+
+#include <asm-generic/irq.h>
+
+extern unsigned int (*csky_get_auto_irqno) (void);
+
+#endif /* __ASM_CSKY_IRQ_H */
diff --git a/arch/csky/include/asm/irqflags.h b/arch/csky/include/asm/irqflags.h
new file mode 100644
index 0000000..ac8035a
--- /dev/null
+++ b/arch/csky/include/asm/irqflags.h
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
+#ifndef __ASM_CSKY_IRQFLAGS_H
+#define __ASM_CSKY_IRQFLAGS_H
+
+static inline unsigned long arch_local_irq_save(void)
+{
+ unsigned long flags;
+ asm volatile(
+ "mfcr %0, psr \n"
+ "psrclr ie \n"
+ :"=r"(flags));
+ return flags;
+}
+#define arch_local_irq_save arch_local_irq_save
+
+static inline void arch_local_irq_enable(void)
+{
+ asm volatile("psrset ee, ie\n");
+}
+#define arch_local_irq_enable arch_local_irq_enable
+
+static inline void arch_local_irq_disable(void)
+{
+ asm volatile("psrclr ie\n");
+}
+#define arch_local_irq_disable arch_local_irq_disable
+
+static inline unsigned long arch_local_save_flags(void)
+{
+ unsigned long flags;
+ asm volatile("mfcr %0, psr\n":"=r"(flags));
+ return flags;
+}
+#define arch_local_save_flags arch_local_save_flags
+
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+ asm volatile(
+ "mtcr %0, psr \n"
+ ::"r" (flags)
+ :"memory"
+ );
+}
+#define arch_local_irq_restore arch_local_irq_restore
+
+static inline int arch_irqs_disabled_flags(unsigned long flags)
+{
+ return !(flags & (1<<6));
+}
+#define arch_irqs_disabled_flags arch_irqs_disabled_flags
+
+#include <asm-generic/irqflags.h>
+
+#endif /* __ASM_CSKY_IRQFLAGS_H */
diff --git a/arch/csky/kernel/irq.c b/arch/csky/kernel/irq.c
new file mode 100644
index 0000000..0cdb4fe
--- /dev/null
+++ b/arch/csky/kernel/irq.c
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+
+unsigned int (*csky_get_auto_irqno) (void) = NULL;
+
+void csky_do_IRQ(int irq, struct pt_regs *regs)
+{
+ struct pt_regs *old_regs = set_irq_regs(regs);
+
+ irq_enter();
+ generic_handle_irq(irq);
+ irq_exit();
+
+ set_irq_regs(old_regs);
+}
+
+asmlinkage void csky_do_auto_IRQ(struct pt_regs *regs)
+{
+ unsigned long irq, psr;
+
+ asm volatile("mfcr %0, psr":"=r"(psr));
+
+ irq = (psr >> 16) & 0xff;
+
+ if (irq == 10)
+ irq = csky_get_auto_irqno();
+ else
+ irq -= 32;
+
+ csky_do_IRQ(irq, regs);
+}
+
+void __init init_IRQ(void)
+{
+ irqchip_init();
+}
+
--
2.7.4
