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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /arch/arm64/kernel/irq.c | |
parent | Initial commit. (diff) | |
download | linux-c109f8d9e922037b3fa45f46d78384d49db8ad76.tar.xz linux-c109f8d9e922037b3fa45f46d78384d49db8ad76.zip |
Adding upstream version 4.19.249.upstream/4.19.249upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm64/kernel/irq.c')
-rw-r--r-- | arch/arm64/kernel/irq.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/arch/arm64/kernel/irq.c b/arch/arm64/kernel/irq.c new file mode 100644 index 000000000..92fa81798 --- /dev/null +++ b/arch/arm64/kernel/irq.c @@ -0,0 +1,78 @@ +/* + * 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; + +/* Only access this in an NMI enter/exit */ +DEFINE_PER_CPU(struct nmi_ctx, nmi_contexts); + +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; +} + +#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."); +} |