mirror of https://gitee.com/openkylin/linux.git
86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
/*
|
|
* Based on arch/arm/kernel/irq.c
|
|
*
|
|
* Copyright (C) 1992 Linus Torvalds
|
|
* Modifications for ARM processor Copyright (C) 1995-2000 Russell King.
|
|
* Support for Dynamic Tick Timer Copyright (C) 2004-2005 Nokia Corporation.
|
|
* Dynamic Tick Timer written by Tony Lindgren <tony@atomide.com> and
|
|
* Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>.
|
|
* Copyright (C) 2012 ARM Ltd.
|
|
*
|
|
* 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.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <linux/kernel_stat.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/memory.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/init.h>
|
|
#include <linux/irqchip.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <asm/vmap_stack.h>
|
|
|
|
unsigned long irq_err_count;
|
|
|
|
DEFINE_PER_CPU(unsigned long *, irq_stack_ptr);
|
|
|
|
int arch_show_interrupts(struct seq_file *p, int prec)
|
|
{
|
|
show_ipi_list(p, prec);
|
|
seq_printf(p, "%*s: %10lu\n", prec, "Err", irq_err_count);
|
|
return 0;
|
|
}
|
|
|
|
void (*handle_arch_irq)(struct pt_regs *) = NULL;
|
|
|
|
void __init set_handle_irq(void (*handle_irq)(struct pt_regs *))
|
|
{
|
|
if (handle_arch_irq)
|
|
return;
|
|
|
|
handle_arch_irq = handle_irq;
|
|
}
|
|
|
|
#ifdef CONFIG_VMAP_STACK
|
|
static void init_irq_stacks(void)
|
|
{
|
|
int cpu;
|
|
unsigned long *p;
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
p = arch_alloc_vmap_stack(IRQ_STACK_SIZE, cpu_to_node(cpu));
|
|
per_cpu(irq_stack_ptr, cpu) = p;
|
|
}
|
|
}
|
|
#else
|
|
/* irq stack only needs to be 16 byte aligned - not IRQ_STACK_SIZE aligned. */
|
|
DEFINE_PER_CPU_ALIGNED(unsigned long [IRQ_STACK_SIZE/sizeof(long)], irq_stack);
|
|
|
|
static void init_irq_stacks(void)
|
|
{
|
|
int cpu;
|
|
|
|
for_each_possible_cpu(cpu)
|
|
per_cpu(irq_stack_ptr, cpu) = per_cpu(irq_stack, cpu);
|
|
}
|
|
#endif
|
|
|
|
void __init init_IRQ(void)
|
|
{
|
|
init_irq_stacks();
|
|
irqchip_init();
|
|
if (!handle_arch_irq)
|
|
panic("No interrupt controller found.");
|
|
}
|