linux-kernel - [PATCH v6 13/36] nds32: IRQ handling

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Message-Id: <84ac81fe8ba6873e7665764d7912e79a900f0c54.1515766253.git.green.hu@gmail.com>
Date:   Mon, 15 Jan 2018 13:53:21 +0800
From:   Greentime Hu <green.hu@...il.com>
To:     greentime@...estech.com, linux-kernel@...r.kernel.org,
        arnd@...db.de, linux-arch@...r.kernel.org, tglx@...utronix.de,
        jason@...edaemon.net, marc.zyngier@....com, robh+dt@...nel.org,
        netdev@...r.kernel.org, deanbo422@...il.com,
        devicetree@...r.kernel.org, viro@...iv.linux.org.uk,
        dhowells@...hat.com, will.deacon@....com,
        daniel.lezcano@...aro.org, linux-serial@...r.kernel.org,
        geert.uytterhoeven@...il.com, linus.walleij@...aro.org,
        mark.rutland@....com, greg@...ah.com, ren_guo@...ky.com,
        rdunlap@...radead.org, davem@...emloft.net, jonas@...thpole.se,
        stefan.kristiansson@...nalahti.fi, shorne@...il.com
Cc:     green.hu@...il.com, Vincent Chen <vincentc@...estech.com>
Subject: [PATCH v6 13/36] nds32: IRQ handling

From: Greentime Hu <greentime@...estech.com>

This patch includes irq related functions and irqchip_init().

Signed-off-by: Vincent Chen <vincentc@...estech.com>
Signed-off-by: Greentime Hu <greentime@...estech.com>
---
 arch/nds32/include/asm/irqflags.h |   36 ++++++++++++++++++++++++++++++++++++
 arch/nds32/kernel/irq.c           |    9 +++++++++
 2 files changed, 45 insertions(+)
 create mode 100644 arch/nds32/include/asm/irqflags.h
 create mode 100644 arch/nds32/kernel/irq.c

diff --git a/arch/nds32/include/asm/irqflags.h b/arch/nds32/include/asm/irqflags.h
new file mode 100644
index 0000000..2bfd00f
--- /dev/null
+++ b/arch/nds32/include/asm/irqflags.h
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2005-2017 Andes Technology Corporation
+
+#include <asm/nds32.h>
+#include <nds32_intrinsic.h>
+
+#define arch_local_irq_disable()	\
+	GIE_DISABLE();
+
+#define arch_local_irq_enable()	\
+	GIE_ENABLE();
+static inline unsigned long arch_local_irq_save(void)
+{
+	unsigned long flags;
+	flags = __nds32__mfsr(NDS32_SR_PSW) & PSW_mskGIE;
+	GIE_DISABLE();
+	return flags;
+}
+
+static inline unsigned long arch_local_save_flags(void)
+{
+	unsigned long flags;
+	flags = __nds32__mfsr(NDS32_SR_PSW) & PSW_mskGIE;
+	return flags;
+}
+
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+	if(flags)
+		GIE_ENABLE();
+}
+
+static inline int arch_irqs_disabled_flags(unsigned long flags)
+{
+	return !flags;
+}
diff --git a/arch/nds32/kernel/irq.c b/arch/nds32/kernel/irq.c
new file mode 100644
index 0000000..6ff5a67
--- /dev/null
+++ b/arch/nds32/kernel/irq.c
@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2005-2017 Andes Technology Corporation
+
+#include <linux/irqchip.h>
+
+void __init init_IRQ(void)
+{
+	irqchip_init();
+}
-- 
1.7.9.5