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/*
 * 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)

/* status32 Bits as encoded/expected by CLRI/SETI */
#define CLRI_STATUS_IE_BIT	4

#define CLRI_STATUS_E_MASK	0xF
#define CLRI_STATUS_IE_MASK	(1 << CLRI_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

/*
 * Hardware supports 16 priorities (0 highest, 15 lowest)
 * Linux by default runs at 1, priority 0 reserved for NMI style interrupts
 */
#define ARCV2_IRQ_DEF_PRIO	1

/* seed value for status register */
#define ISA_INIT_STATUS_BITS	(STATUS_IE_MASK | STATUS_AD_MASK | \
					(ARCV2_IRQ_DEF_PRIO << 1))

#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");

	/* To be compatible with irq_save()/irq_restore()
	 * encode the irq bits as expected by CLRI/SETI
	 * (this was needed to make CONFIG_TRACE_IRQFLAGS work)
	 */
	temp = (1 << 5) |
		((!!(temp & STATUS_IE_MASK)) << CLRI_STATUS_IE_BIT) |
		((temp >> 1) & CLRI_STATUS_E_MASK);
	return temp;
}

/*
 * Query IRQ state
 */
static inline int arch_irqs_disabled_flags(unsigned long flags)
{
	return !(flags & CLRI_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

#ifdef CONFIG_TRACE_IRQFLAGS

.macro TRACE_ASM_IRQ_DISABLE
	bl	trace_hardirqs_off
.endm

.macro TRACE_ASM_IRQ_ENABLE
	bl	trace_hardirqs_on
.endm

#else

.macro TRACE_ASM_IRQ_DISABLE
.endm

.macro TRACE_ASM_IRQ_ENABLE
.endm

#endif
.macro IRQ_DISABLE  scratch
	clri
	TRACE_ASM_IRQ_DISABLE
.endm

.macro IRQ_ENABLE  scratch
	TRACE_ASM_IRQ_ENABLE
	seti
.endm

#endif	/* __ASSEMBLY__ */

#endif

Filemanager

Name Type Size Permission Actions
Kbuild File 681 B 0644
arcregs.h File 8.59 KB 0644
asm-offsets.h File 311 B 0644
atomic.h File 15.14 KB 0644
barrier.h File 1.75 KB 0644
bitops.h File 9.81 KB 0644
bug.h File 938 B 0644
cache.h File 3.77 KB 0644
cacheflush.h File 3.88 KB 0644
checksum.h File 2.45 KB 0644
cmpxchg.h File 5.4 KB 0644
current.h File 695 B 0644
delay.h File 1.99 KB 0644
disasm.h File 3.87 KB 0644
dma-mapping.h File 734 B 0644
dma.h File 459 B 0644
dwarf.h File 892 B 0644
elf.h File 2.15 KB 0644
entry-arcv2.h File 4.85 KB 0644
entry-compact.h File 9.29 KB 0644
entry.h File 6.73 KB 0644
exec.h File 410 B 0644
fb.h File 411 B 0644
futex.h File 3.67 KB 0644
highmem.h File 1.46 KB 0644
hugepage.h File 2.41 KB 0644
io.h File 6.43 KB 0644
irq.h File 825 B 0644
irqflags-arcv2.h File 3.45 KB 0644
irqflags-compact.h File 4.25 KB 0644
irqflags.h File 509 B 0644
kdebug.h File 400 B 0644
kgdb.h File 1.35 KB 0644
kmap_types.h File 489 B 0644
kprobes.h File 1.37 KB 0644
linkage.h File 1.42 KB 0644
mach_desc.h File 2.06 KB 0644
mmu.h File 2.44 KB 0644
mmu_context.h File 5.67 KB 0644
mmzone.h File 989 B 0644
module.h File 661 B 0644
page.h File 2.99 KB 0644
pci.h File 705 B 0644
perf_event.h File 6.86 KB 0644
pgalloc.h File 3.79 KB 0644
pgtable.h File 14.2 KB 0644
processor.h File 4.69 KB 0644
ptrace.h File 3.87 KB 0644
sections.h File 407 B 0644
segment.h File 612 B 0644
serial.h File 644 B 0644
setup.h File 1.18 KB 0644
shmparam.h File 442 B 0644
smp.h File 4.25 KB 0644
spinlock.h File 8.79 KB 0644
spinlock_types.h File 1.03 KB 0644
stacktrace.h File 1.29 KB 0644
string.h File 1.15 KB 0644
switch_to.h File 1.17 KB 0644
syscall.h File 1.57 KB 0644
syscalls.h File 653 B 0644
thread_info.h File 3.39 KB 0644
timex.h File 508 B 0644
tlb-mmu1.h File 3.48 KB 0644
tlb.h File 1.23 KB 0644
tlbflush.h File 1.76 KB 0644
uaccess.h File 18.45 KB 0644
unaligned.h File 771 B 0644
unwind.h File 3.51 KB 0644