projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| fb9bd7d6 MZ |
1 | /* |
| 2 | * Based on arch/arm/kernel/irq.c | |
| 3 | * | |
| 4 | * Copyright (C) 1992 Linus Torvalds | |
| 5 | * Modifications for ARM processor Copyright (C) 1995-2000 Russell King. | |
| 6 | * Support for Dynamic Tick Timer Copyright (C) 2004-2005 Nokia Corporation. | |
| 7 | * Dynamic Tick Timer written by Tony Lindgren <tony@atomide.com> and | |
| 8 | * Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>. | |
| 9 | * Copyright (C) 2012 ARM Ltd. | |
| 10 | * | |
| 11 | * This program is free software; you can redistribute it and/or modify | |
| 12 | * it under the terms of the GNU General Public License version 2 as | |
| 13 | * published by the Free Software Foundation. | |
| 14 | * | |
| 15 | * This program is distributed in the hope that it will be useful, | |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 18 | * GNU General Public License for more details. | |
| 19 | * | |
| 20 | * You should have received a copy of the GNU General Public License | |
| 21 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 22 | */ | |
| 23 | ||
| 24 | #include <linux/kernel_stat.h> | |
| 25 | #include <linux/irq.h> | |
| e3067861 | 26 | #include <linux/memory.h> |
| fb9bd7d6 MZ |
27 | #include <linux/smp.h> |
| 28 | #include <linux/init.h> | |
| e851b58c | 29 | #include <linux/irqchip.h> |
| fb9bd7d6 | 30 | #include <linux/seq_file.h> |
| e3067861 | 31 | #include <linux/vmalloc.h> |
| ed8b20d4 | 32 | #include <asm/vmap_stack.h> |
| fb9bd7d6 MZ |
33 | |
| 34 | unsigned long irq_err_count; | |
| 35 | ||
| 5870970b JT |
36 | /* Only access this in an NMI enter/exit */ |
| 37 | DEFINE_PER_CPU(struct nmi_ctx, nmi_contexts); | |
| 38 | ||
| f60fe78f | 39 | DEFINE_PER_CPU(unsigned long *, irq_stack_ptr); |
| 132cd887 | 40 | |
| fb9bd7d6 MZ |
41 | int arch_show_interrupts(struct seq_file *p, int prec) |
| 42 | { | |
| fb9bd7d6 | 43 | show_ipi_list(p, prec); |
| fb9bd7d6 MZ |
44 | seq_printf(p, "%*s: %10lu\n", prec, "Err", irq_err_count); |
| 45 | return 0; | |
| 46 | } | |
| 47 | ||
| e3067861 MR |
48 | #ifdef CONFIG_VMAP_STACK |
| 49 | static void init_irq_stacks(void) | |
| 50 | { | |
| 51 | int cpu; | |
| 52 | unsigned long *p; | |
| 53 | ||
| 54 | for_each_possible_cpu(cpu) { | |
| ed8b20d4 | 55 | p = arch_alloc_vmap_stack(IRQ_STACK_SIZE, cpu_to_node(cpu)); |
| e3067861 MR |
56 | per_cpu(irq_stack_ptr, cpu) = p; |
| 57 | } | |
| 58 | } | |
| 59 | #else | |
| 60 | /* irq stack only needs to be 16 byte aligned - not IRQ_STACK_SIZE aligned. */ | |
| 61 | DEFINE_PER_CPU_ALIGNED(unsigned long [IRQ_STACK_SIZE/sizeof(long)], irq_stack); | |
| 62 | ||
| f60fe78f MR |
63 | static void init_irq_stacks(void) |
| 64 | { | |
| 65 | int cpu; | |
| 66 | ||
| 67 | for_each_possible_cpu(cpu) | |
| 68 | per_cpu(irq_stack_ptr, cpu) = per_cpu(irq_stack, cpu); | |
| 69 | } | |
| e3067861 | 70 | #endif |
| f60fe78f | 71 | |
| fb9bd7d6 MZ |
72 | void __init init_IRQ(void) |
| 73 | { | |
| f60fe78f | 74 | init_irq_stacks(); |
| e851b58c | 75 | irqchip_init(); |
| fb9bd7d6 MZ |
76 | if (!handle_arch_irq) |
| 77 | panic("No interrupt controller found."); | |
| 78 | } |