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Diffstat (limited to 'kernel/arch/arc/include/asm/irqflags-arcv2.h')
-rw-r--r--kernel/arch/arc/include/asm/irqflags-arcv2.h138
1 files changed, 138 insertions, 0 deletions
diff --git a/kernel/arch/arc/include/asm/irqflags-arcv2.h b/kernel/arch/arc/include/asm/irqflags-arcv2.h
new file mode 100644
index 000000000..68b609234
--- /dev/null
+++ b/kernel/arch/arc/include/asm/irqflags-arcv2.h
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_IRQFLAGS_ARCV2_H
+#define __ASM_IRQFLAGS_ARCV2_H
+
+#include <asm/arcregs.h>
+
+/* status32 Bits */
+#define STATUS_AD_BIT 19 /* Disable Align chk: core supports non-aligned */
+#define STATUS_IE_BIT 31
+
+#define STATUS_AD_MASK (1<<STATUS_AD_BIT)
+#define STATUS_IE_MASK (1<<STATUS_IE_BIT)
+
+#define AUX_USER_SP 0x00D
+#define AUX_IRQ_CTRL 0x00E
+#define AUX_IRQ_ACT 0x043 /* Active Intr across all levels */
+#define AUX_IRQ_LVL_PEND 0x200 /* Pending Intr across all levels */
+#define AUX_IRQ_HINT 0x201 /* For generating Soft Interrupts */
+#define AUX_IRQ_PRIORITY 0x206
+#define ICAUSE 0x40a
+#define AUX_IRQ_SELECT 0x40b
+#define AUX_IRQ_ENABLE 0x40c
+
+/* Was Intr taken in User Mode */
+#define AUX_IRQ_ACT_BIT_U 31
+
+/* 0 is highest level, but taken by FIRQs, if present in design */
+#define ARCV2_IRQ_DEF_PRIO 0
+
+/* seed value for status register */
+#define ISA_INIT_STATUS_BITS (STATUS_IE_MASK | STATUS_AD_MASK | \
+ (ARCV2_IRQ_DEF_PRIO << 1))
+
+/* SLEEP needs default irq priority (<=) which can interrupt the doze */
+#define ISA_SLEEP_ARG (0x10 | ARCV2_IRQ_DEF_PRIO)
+
+#ifndef __ASSEMBLY__
+
+/*
+ * Save IRQ state and disable IRQs
+ */
+static inline long arch_local_irq_save(void)
+{
+ unsigned long flags;
+
+ __asm__ __volatile__(" clri %0 \n" : "=r" (flags) : : "memory");
+
+ return flags;
+}
+
+/*
+ * restore saved IRQ state
+ */
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+ __asm__ __volatile__(" seti %0 \n" : : "r" (flags) : "memory");
+}
+
+/*
+ * Unconditionally Enable IRQs
+ */
+static inline void arch_local_irq_enable(void)
+{
+ unsigned int irqact = read_aux_reg(AUX_IRQ_ACT);
+
+ if (irqact & 0xffff)
+ write_aux_reg(AUX_IRQ_ACT, irqact & ~0xffff);
+
+ __asm__ __volatile__(" seti \n" : : : "memory");
+}
+
+/*
+ * Unconditionally Disable IRQs
+ */
+static inline void arch_local_irq_disable(void)
+{
+ __asm__ __volatile__(" clri \n" : : : "memory");
+}
+
+/*
+ * save IRQ state
+ */
+static inline long arch_local_save_flags(void)
+{
+ unsigned long temp;
+
+ __asm__ __volatile__(
+ " lr %0, [status32] \n"
+ : "=&r"(temp)
+ :
+ : "memory");
+
+ return temp;
+}
+
+/*
+ * Query IRQ state
+ */
+static inline int arch_irqs_disabled_flags(unsigned long flags)
+{
+ return !(flags & (STATUS_IE_MASK));
+}
+
+static inline int arch_irqs_disabled(void)
+{
+ return arch_irqs_disabled_flags(arch_local_save_flags());
+}
+
+static inline void arc_softirq_trigger(int irq)
+{
+ write_aux_reg(AUX_IRQ_HINT, irq);
+}
+
+static inline void arc_softirq_clear(int irq)
+{
+ write_aux_reg(AUX_IRQ_HINT, 0);
+}
+
+#else
+
+.macro IRQ_DISABLE scratch
+ clri
+.endm
+
+.macro IRQ_ENABLE scratch
+ seti
+.endm
+
+#endif /* __ASSEMBLY__ */
+
+#endif