1eedbdab9SMichal Simek /* 2eedbdab9SMichal Simek * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu> 3eedbdab9SMichal Simek * Copyright (C) 2007-2009 PetaLogix 4eedbdab9SMichal Simek * Copyright (C) 2006 Atmark Techno, Inc. 5eedbdab9SMichal Simek * 6eedbdab9SMichal Simek * This file is subject to the terms and conditions of the GNU General Public 7eedbdab9SMichal Simek * License. See the file "COPYING" in the main directory of this archive 8eedbdab9SMichal Simek * for more details. 9eedbdab9SMichal Simek */ 10eedbdab9SMichal Simek 11eedbdab9SMichal Simek #include <linux/init.h> 12e6d7961eSSteven J. Magnani #include <linux/ftrace.h> 13eedbdab9SMichal Simek #include <linux/kernel.h> 14eedbdab9SMichal Simek #include <linux/hardirq.h> 15eedbdab9SMichal Simek #include <linux/interrupt.h> 16eedbdab9SMichal Simek #include <linux/irqflags.h> 17eedbdab9SMichal Simek #include <linux/seq_file.h> 18eedbdab9SMichal Simek #include <linux/kernel_stat.h> 19eedbdab9SMichal Simek #include <linux/irq.h> 20eedbdab9SMichal Simek 21eedbdab9SMichal Simek #include <asm/prom.h> 22eedbdab9SMichal Simek 23eedbdab9SMichal Simek unsigned int irq_of_parse_and_map(struct device_node *dev, int index) 24eedbdab9SMichal Simek { 25eedbdab9SMichal Simek struct of_irq oirq; 26eedbdab9SMichal Simek 27eedbdab9SMichal Simek if (of_irq_map_one(dev, index, &oirq)) 28eedbdab9SMichal Simek return NO_IRQ; 29eedbdab9SMichal Simek 30eedbdab9SMichal Simek return oirq.specifier[0]; 31eedbdab9SMichal Simek } 32eedbdab9SMichal Simek EXPORT_SYMBOL_GPL(irq_of_parse_and_map); 33eedbdab9SMichal Simek 34eedbdab9SMichal Simek static u32 concurrent_irq; 35eedbdab9SMichal Simek 36e6d7961eSSteven J. Magnani void __irq_entry do_IRQ(struct pt_regs *regs) 37eedbdab9SMichal Simek { 38eedbdab9SMichal Simek unsigned int irq; 39eedbdab9SMichal Simek struct pt_regs *old_regs = set_irq_regs(regs); 40*0d9ec762SMichal Simek trace_hardirqs_off(); 41eedbdab9SMichal Simek 42eedbdab9SMichal Simek irq_enter(); 43eedbdab9SMichal Simek irq = get_irq(regs); 44eedbdab9SMichal Simek next_irq: 45eedbdab9SMichal Simek BUG_ON(irq == -1U); 46eedbdab9SMichal Simek generic_handle_irq(irq); 47eedbdab9SMichal Simek 48eedbdab9SMichal Simek irq = get_irq(regs); 49eedbdab9SMichal Simek if (irq != -1U) { 50eedbdab9SMichal Simek pr_debug("next irq: %d\n", irq); 51eedbdab9SMichal Simek ++concurrent_irq; 52eedbdab9SMichal Simek goto next_irq; 53eedbdab9SMichal Simek } 54eedbdab9SMichal Simek 55eedbdab9SMichal Simek irq_exit(); 56eedbdab9SMichal Simek set_irq_regs(old_regs); 57*0d9ec762SMichal Simek trace_hardirqs_on(); 58eedbdab9SMichal Simek } 59eedbdab9SMichal Simek 60eedbdab9SMichal Simek int show_interrupts(struct seq_file *p, void *v) 61eedbdab9SMichal Simek { 62eedbdab9SMichal Simek int i = *(loff_t *) v, j; 63eedbdab9SMichal Simek struct irqaction *action; 64eedbdab9SMichal Simek unsigned long flags; 65eedbdab9SMichal Simek 66eedbdab9SMichal Simek if (i == 0) { 67eedbdab9SMichal Simek seq_printf(p, " "); 68eedbdab9SMichal Simek for_each_online_cpu(j) 69eedbdab9SMichal Simek seq_printf(p, "CPU%-8d", j); 70eedbdab9SMichal Simek seq_putc(p, '\n'); 71eedbdab9SMichal Simek } 72eedbdab9SMichal Simek 73eedbdab9SMichal Simek if (i < nr_irq) { 74239007b8SThomas Gleixner raw_spin_lock_irqsave(&irq_desc[i].lock, flags); 75eedbdab9SMichal Simek action = irq_desc[i].action; 76eedbdab9SMichal Simek if (!action) 77eedbdab9SMichal Simek goto skip; 78eedbdab9SMichal Simek seq_printf(p, "%3d: ", i); 79eedbdab9SMichal Simek #ifndef CONFIG_SMP 80eedbdab9SMichal Simek seq_printf(p, "%10u ", kstat_irqs(i)); 81eedbdab9SMichal Simek #else 82eedbdab9SMichal Simek for_each_online_cpu(j) 83eedbdab9SMichal Simek seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]); 84eedbdab9SMichal Simek #endif 85eedbdab9SMichal Simek seq_printf(p, " %8s", irq_desc[i].status & 86eedbdab9SMichal Simek IRQ_LEVEL ? "level" : "edge"); 87eedbdab9SMichal Simek seq_printf(p, " %8s", irq_desc[i].chip->name); 88eedbdab9SMichal Simek seq_printf(p, " %s", action->name); 89eedbdab9SMichal Simek 90eedbdab9SMichal Simek for (action = action->next; action; action = action->next) 91eedbdab9SMichal Simek seq_printf(p, ", %s", action->name); 92eedbdab9SMichal Simek 93eedbdab9SMichal Simek seq_putc(p, '\n'); 94eedbdab9SMichal Simek skip: 95239007b8SThomas Gleixner raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags); 96eedbdab9SMichal Simek } 97eedbdab9SMichal Simek return 0; 98eedbdab9SMichal Simek } 99c6ba01a4SMichal Simek 100c6ba01a4SMichal Simek /* MS: There is no any advance mapping mechanism. We are using simple 32bit 101c6ba01a4SMichal Simek intc without any cascades or any connection that's why mapping is 1:1 */ 102c6ba01a4SMichal Simek unsigned int irq_create_mapping(struct irq_host *host, irq_hw_number_t hwirq) 103c6ba01a4SMichal Simek { 104c6ba01a4SMichal Simek return hwirq; 105c6ba01a4SMichal Simek } 106c6ba01a4SMichal Simek EXPORT_SYMBOL_GPL(irq_create_mapping); 107c6ba01a4SMichal Simek 108c6ba01a4SMichal Simek unsigned int irq_create_of_mapping(struct device_node *controller, 109c6ba01a4SMichal Simek u32 *intspec, unsigned int intsize) 110c6ba01a4SMichal Simek { 111c6ba01a4SMichal Simek return intspec[0]; 112c6ba01a4SMichal Simek } 113c6ba01a4SMichal Simek EXPORT_SYMBOL_GPL(irq_create_of_mapping); 114