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 | ||
| f60fe78f | 36 | DEFINE_PER_CPU(unsigned long *, irq_stack_ptr); |
| 132cd887 | 37 | |
| fb9bd7d6 MZ |
38 | int arch_show_interrupts(struct seq_file *p, int prec) |
| 39 | { | |
| fb9bd7d6 | 40 | show_ipi_list(p, prec); |
| fb9bd7d6 MZ |
41 | seq_printf(p, "%*s: %10lu\n", prec, "Err", irq_err_count); |
| 42 | return 0; | |
| 43 | } | |
| 44 | ||
| e3067861 MR |
45 | #ifdef CONFIG_VMAP_STACK |
| 46 | static void init_irq_stacks(void) | |
| 47 | { | |
| 48 | int cpu; | |
| 49 | unsigned long *p; | |
| 50 | ||
| 51 | for_each_possible_cpu(cpu) { | |
| ed8b20d4 | 52 | p = arch_alloc_vmap_stack(IRQ_STACK_SIZE, cpu_to_node(cpu)); |
| e3067861 MR |
53 | per_cpu(irq_stack_ptr, cpu) = p; |
| 54 | } | |
| 55 | } | |
| 56 | #else | |
| 57 | /* irq stack only needs to be 16 byte aligned - not IRQ_STACK_SIZE aligned. */ | |
| 58 | DEFINE_PER_CPU_ALIGNED(unsigned long [IRQ_STACK_SIZE/sizeof(long)], irq_stack); | |
| 59 | ||
| f60fe78f MR |
60 | static void init_irq_stacks(void) |
| 61 | { | |
| 62 | int cpu; | |
| 63 | ||
| 64 | for_each_possible_cpu(cpu) | |
| 65 | per_cpu(irq_stack_ptr, cpu) = per_cpu(irq_stack, cpu); | |
| 66 | } | |
| e3067861 | 67 | #endif |
| f60fe78f | 68 | |
| fb9bd7d6 MZ |
69 | void __init init_IRQ(void) |
| 70 | { | |
| f60fe78f | 71 | init_irq_stacks(); |
| e851b58c | 72 | irqchip_init(); |
| fb9bd7d6 MZ |
73 | if (!handle_arch_irq) |
| 74 | panic("No interrupt controller found."); | |
| 75 | } |