arch/openrisc/kernel/irq.c

Source file repositories/reference/linux-study-clean/arch/openrisc/kernel/irq.c

File Facts

System
Linux kernel
Corpus path
arch/openrisc/kernel/irq.c
Extension
.c
Size
939 bytes
Lines
39
Domain
Architecture Layer
Bucket
arch/openrisc
Inferred role
Architecture Layer: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * OpenRISC irq.c
 *
 * Linux architectural port borrowing liberally from similar works of
 * others.  All original copyrights apply as per the original source
 * declaration.
 *
 * Modifications for the OpenRISC architecture:
 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
 */

#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/ftrace.h>
#include <linux/irq.h>
#include <linux/irqchip.h>
#include <linux/export.h>
#include <linux/irqflags.h>

/* read interrupt enabled status */
unsigned long arch_local_save_flags(void)
{
	return mfspr(SPR_SR) & (SPR_SR_IEE|SPR_SR_TEE);
}
EXPORT_SYMBOL(arch_local_save_flags);

/* set interrupt enabled status */
void arch_local_irq_restore(unsigned long flags)
{
	mtspr(SPR_SR, ((mfspr(SPR_SR) & ~(SPR_SR_IEE|SPR_SR_TEE)) | flags));
}
EXPORT_SYMBOL(arch_local_irq_restore);

void __init init_IRQ(void)
{
	irqchip_init();
}

Annotation

Implementation Notes