166 lines
3.8 KiB
C
166 lines
3.8 KiB
C
// 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>
|
|
#include "legacy_boot.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 acpi_vector_group pch_group[MAX_IO_PICS];
|
|
struct acpi_vector_group msi_group[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;
|
|
}
|
|
|
|
static int __init early_pci_mcfg_parse(struct acpi_table_header *header)
|
|
{
|
|
struct acpi_table_mcfg *mcfg;
|
|
struct acpi_mcfg_allocation *mptr;
|
|
int i, n;
|
|
|
|
if (header->length < sizeof(struct acpi_table_mcfg))
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < MAX_IO_PICS; i++) {
|
|
msi_group[i].pci_segment = -1;
|
|
msi_group[i].node = -1;
|
|
pch_group[i].node = -1;
|
|
}
|
|
|
|
n = (header->length - sizeof(struct acpi_table_mcfg)) /
|
|
sizeof(struct acpi_mcfg_allocation);
|
|
mcfg = (struct acpi_table_mcfg *)header;
|
|
mptr = (struct acpi_mcfg_allocation *) &mcfg[1];
|
|
|
|
for (i = 0; i < n; i++, mptr++) {
|
|
msi_group[i].pci_segment = mptr->pci_segment;
|
|
pch_group[i].node = msi_group[i].node = (mptr->address >> 44) & 0xf;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __init init_vec_parent_group(void)
|
|
{
|
|
acpi_table_parse(ACPI_SIG_MCFG, early_pci_mcfg_parse);
|
|
}
|
|
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
static void handle_irq_affinity(void)
|
|
{
|
|
struct irq_desc *desc;
|
|
struct irq_chip *chip;
|
|
unsigned int irq;
|
|
unsigned long flags;
|
|
struct cpumask *affinity;
|
|
|
|
for_each_active_irq(irq) {
|
|
desc = irq_to_desc(irq);
|
|
if (!desc)
|
|
continue;
|
|
|
|
raw_spin_lock_irqsave(&desc->lock, flags);
|
|
|
|
affinity = desc->irq_data.common->affinity;
|
|
if (!cpumask_intersects(affinity, cpu_online_mask))
|
|
cpumask_copy(affinity, cpu_online_mask);
|
|
|
|
chip = irq_data_get_irq_chip(&desc->irq_data);
|
|
if (chip && chip->irq_set_affinity)
|
|
chip->irq_set_affinity(&desc->irq_data,
|
|
desc->irq_data.common->affinity, true);
|
|
raw_spin_unlock_irqrestore(&desc->lock, flags);
|
|
}
|
|
}
|
|
|
|
void fixup_irqs(void)
|
|
{
|
|
handle_irq_affinity();
|
|
irq_cpu_offline();
|
|
clear_csr_ecfg(ECFG0_IM);
|
|
}
|
|
#endif
|
|
|
|
void __init init_IRQ(void)
|
|
{
|
|
int i, ret;
|
|
unsigned int order = get_order(IRQ_STACK_SIZE);
|
|
struct page *page;
|
|
unsigned long node;
|
|
|
|
if (!acpi_gbl_reduced_hardware) {
|
|
for_each_node(node)
|
|
writel(0x40000000 | (node << 12),
|
|
(volatile void __iomem *)(0x80000efdfb000274UL + (node<<44)));
|
|
}
|
|
|
|
clear_csr_ecfg(ECFG0_IM);
|
|
clear_csr_estat(ESTATF_IP);
|
|
|
|
init_vec_parent_group();
|
|
if (efi_bp && bpi_version <= BPI_VERSION_V1) {
|
|
ret = setup_legacy_IRQ();
|
|
if (ret)
|
|
panic("IRQ domain init error!\n");
|
|
} else {
|
|
irqchip_init();
|
|
}
|
|
#ifdef CONFIG_SMP
|
|
smp_ops.init_ipi();
|
|
#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_SIP0 | ECFGF_IP0 | ECFGF_IP1 | ECFGF_IP2 | ECFGF_IPI | ECFGF_PMC);
|
|
}
|