diff options
Diffstat (limited to 'arch/loongarch/kernel/irq.c')
| -rw-r--r-- | arch/loongarch/kernel/irq.c | 58 |
1 files changed, 51 insertions, 7 deletions
diff --git a/arch/loongarch/kernel/irq.c b/arch/loongarch/kernel/irq.c index b34b8d792aa4..1ba19c76563e 100644 --- a/arch/loongarch/kernel/irq.c +++ b/arch/loongarch/kernel/irq.c @@ -25,12 +25,8 @@ 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]; - +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. @@ -56,6 +52,51 @@ int arch_show_interrupts(struct seq_file *p, int prec) 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; + + 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) +{ + int i; + + for (i = 0; i < MAX_IO_PICS; i++) { + msi_group[i].pci_segment = -1; + msi_group[i].node = -1; + pch_group[i].node = -1; + } + + acpi_table_parse(ACPI_SIG_MCFG, early_pci_mcfg_parse); +} + +static int __init get_ipi_irq(void) +{ + struct irq_domain *d = irq_find_matching_fwnode(cpuintc_handle, DOMAIN_BUS_ANY); + + if (d) + return irq_create_mapping(d, EXCCODE_IPI - EXCCODE_INT_START); + + return -EINVAL; +} + void __init init_IRQ(void) { int i; @@ -69,9 +110,12 @@ void __init init_IRQ(void) clear_csr_ecfg(ECFG0_IM); clear_csr_estat(ESTATF_IP); + init_vec_parent_group(); irqchip_init(); #ifdef CONFIG_SMP - ipi_irq = EXCCODE_IPI - EXCCODE_INT_START; + ipi_irq = get_ipi_irq(); + if (ipi_irq < 0) + panic("IPI IRQ mapping failed\n"); irq_set_percpu_devid(ipi_irq); r = request_percpu_irq(ipi_irq, loongson3_ipi_interrupt, "IPI", &ipi_dummy_dev); if (r < 0) |