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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
*/
#include <linux/kernel.h>
#include <linux/acpi.h>
#include <linux/atomic.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irqchip.h>
#include <linux/kernel_stat.h>
#include <linux/proc_fs.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/seq_file.h>
#include <linux/kallsyms.h>
#include <linux/uaccess.h>
#include <asm/irq.h>
#include <asm/loongson.h>
#include <asm/setup.h>
DEFINE_PER_CPU(unsigned long, irq_stack);
DEFINE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat);
EXPORT_PER_CPU_SYMBOL(irq_stat);
struct irq_domain *cpu_domain;
struct irq_domain *liointc_domain;
struct irq_domain *pch_lpc_domain;
struct irq_domain *pch_msi_domain[MAX_IO_PICS];
struct irq_domain *pch_pic_domain[MAX_IO_PICS];
/*
* 'what should we do if we get a hw irq event on an illegal vector'.
* each architecture has to answer this themselves.
*/
void ack_bad_irq(unsigned int irq)
{
pr_warn("Unexpected IRQ # %d\n", irq);
}
atomic_t irq_err_count;
asmlinkage void spurious_interrupt(void)
{
atomic_inc(&irq_err_count);
}
int arch_show_interrupts(struct seq_file *p, int prec)
{
#ifdef CONFIG_SMP
show_ipi_list(p, prec);
#endif
seq_printf(p, "%*s: %10u\n", prec, "ERR", atomic_read(&irq_err_count));
return 0;
}
void __init init_IRQ(void)
{
int i;
#ifdef CONFIG_SMP
int r, ipi_irq;
static int ipi_dummy_dev;
#endif
unsigned int order = get_order(IRQ_STACK_SIZE);
struct page *page;
clear_csr_ecfg(ECFG0_IM);
clear_csr_estat(ESTATF_IP);
irqchip_init();
#ifdef CONFIG_SMP
ipi_irq = EXCCODE_IPI - EXCCODE_INT_START;
irq_set_percpu_devid(ipi_irq);
r = request_percpu_irq(ipi_irq, loongson3_ipi_interrupt, "IPI", &ipi_dummy_dev);
if (r < 0)
panic("IPI IRQ request failed\n");
#endif
for (i = 0; i < NR_IRQS; i++)
irq_set_noprobe(i);
for_each_possible_cpu(i) {
page = alloc_pages_node(cpu_to_node(i), GFP_KERNEL, order);
per_cpu(irq_stack, i) = (unsigned long)page_address(page);
pr_debug("CPU%d IRQ stack at 0x%lx - 0x%lx\n", i,
per_cpu(irq_stack, i), per_cpu(irq_stack, i) + IRQ_STACK_SIZE);
}
set_csr_ecfg(ECFGF_IP0 | ECFGF_IP1 | ECFGF_IP2 | ECFGF_IPI | ECFGF_PMC);
}
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