arch/arm/mach-orion5x/irq.c
Source file repositories/reference/linux-study-clean/arch/arm/mach-orion5x/irq.c
File Facts
- System
- Linux kernel
- Corpus path
arch/arm/mach-orion5x/irq.c- Extension
.c- Size
- 1086 bytes
- Lines
- 52
- Domain
- Architecture Layer
- Bucket
- arch/arm
- Inferred role
- Architecture Layer: implementation source
- Status
- source 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.
- CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/gpio.hlinux/kernel.hlinux/irq.hlinux/io.hplat/orion-gpio.hplat/irq.hasm/exception.hbridge-regs.hcommon.h
Detected Declarations
function orion5x_legacy_handle_irqfunction orion5x_init_irq
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0-only
/*
* arch/arm/mach-orion5x/irq.c
*
* Core IRQ functions for Marvell Orion System On Chip
*
* Maintainer: Tzachi Perelstein <tzachi@marvell.com>
*/
#include <linux/gpio.h>
#include <linux/kernel.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <plat/orion-gpio.h>
#include <plat/irq.h>
#include <asm/exception.h>
#include "bridge-regs.h"
#include "common.h"
static int __initdata gpio0_irqs[4] = {
IRQ_ORION5X_GPIO_0_7,
IRQ_ORION5X_GPIO_8_15,
IRQ_ORION5X_GPIO_16_23,
IRQ_ORION5X_GPIO_24_31,
};
static asmlinkage void
__exception_irq_entry orion5x_legacy_handle_irq(struct pt_regs *regs)
{
u32 stat;
stat = readl_relaxed(MAIN_IRQ_CAUSE);
stat &= readl_relaxed(MAIN_IRQ_MASK);
if (stat) {
unsigned int hwirq = 1 + __fls(stat);
handle_IRQ(hwirq, regs);
return;
}
}
void __init orion5x_init_irq(void)
{
orion_irq_init(1, MAIN_IRQ_MASK);
set_handle_irq(orion5x_legacy_handle_irq);
/*
* Initialize gpiolib for GPIOs 0-31.
*/
orion_gpio_init(0, 32, GPIO_VIRT_BASE, 0,
IRQ_ORION5X_GPIO_START, gpio0_irqs);
}
Annotation
- Immediate include surface: `linux/gpio.h`, `linux/kernel.h`, `linux/irq.h`, `linux/io.h`, `plat/orion-gpio.h`, `plat/irq.h`, `asm/exception.h`, `bridge-regs.h`.
- Detected declarations: `function orion5x_legacy_handle_irq`, `function orion5x_init_irq`.
- Atlas domain: Architecture Layer / arch/arm.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.