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Message-Id: <131eaaee23e5f55cdce90b76b2a64f67cdf0c685.1539655732.git.ren_guo@c-sky.com>
Date: Tue, 16 Oct 2018 10:58:29 +0800
From: Guo Ren <ren_guo@...ky.com>
To: akpm@...ux-foundation.org, arnd@...db.de,
daniel.lezcano@...aro.org, davem@...emloft.net,
gregkh@...uxfoundation.org, hch@...radead.org,
marc.zyngier@....com, mark.rutland@....com, peterz@...radead.org,
robh@...nel.org, tglx@...utronix.de
Cc: linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
devicetree@...r.kernel.org, robh+dt@...nel.org,
c-sky_gcc_upstream@...ky.com, Guo Ren <ren_guo@...ky.com>
Subject: [PATCH V9 10/21] csky: IRQ handling
This patch adds IRQ handling files.
Signed-off-by: Guo Ren <ren_guo@...ky.com>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Thomas Gleixner <tglx@...utronix.de>
---
Changelog:
- Use CONFIG_GENERIC_IRQ_MULTI_HANDLER
---
---
arch/csky/include/asm/irqflags.h | 49 ++++++++++++++++++++++++++++++++++++++++
arch/csky/kernel/irq.c | 22 ++++++++++++++++++
2 files changed, 71 insertions(+)
create mode 100644 arch/csky/include/asm/irqflags.h
create mode 100644 arch/csky/kernel/irq.c
diff --git a/arch/csky/include/asm/irqflags.h b/arch/csky/include/asm/irqflags.h
new file mode 100644
index 0000000..9e3a569
--- /dev/null
+++ b/arch/csky/include/asm/irqflags.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __ASM_CSKY_IRQFLAGS_H
+#define __ASM_CSKY_IRQFLAGS_H
+#include <abi/reg_ops.h>
+
+static inline unsigned long arch_local_irq_save(void)
+{
+ unsigned long flags;
+
+ flags = mfcr("psr");
+ asm volatile("psrclr ie\n":::"memory");
+ 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":::"memory");
+}
+#define arch_local_irq_enable arch_local_irq_enable
+
+static inline void arch_local_irq_disable(void)
+{
+ asm volatile("psrclr ie\n":::"memory");
+}
+#define arch_local_irq_disable arch_local_irq_disable
+
+static inline unsigned long arch_local_save_flags(void)
+{
+ return mfcr("psr");
+}
+#define arch_local_save_flags arch_local_save_flags
+
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+ mtcr("psr", flags);
+}
+#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..03a1930
--- /dev/null
+++ b/arch/csky/kernel/irq.c
@@ -0,0 +1,22 @@
+// 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>
+#include <asm/traps.h>
+#include <asm/smp.h>
+
+void __init init_IRQ(void)
+{
+ irqchip_init();
+#ifdef CONFIG_SMP
+ setup_smp_ipi();
+#endif
+}
+
+asmlinkage void __irq_entry csky_do_IRQ(struct pt_regs *regs)
+{
+ handle_arch_irq(regs);
+}
--
2.7.4
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