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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172/* * linux/arch/m68k/kernel/ints.c -- Linux/m68k general interrupt handling code * * This file is subject to the terms and conditions of the GNU General Public * License. See the file COPYING in the main directory of this archive * for more details. */
#include <linux/module.h>#include <linux/types.h>#include <linux/sched.h>#include <linux/interrupt.h>#include <linux/errno.h>#include <linux/init.h>#include <linux/irq.h>
#include <asm/setup.h>#include <asm/irq.h>#include <asm/traps.h>#include <asm/page.h>#include <asm/machdep.h>#include <asm/cacheflush.h>#include <asm/irq_regs.h>
#ifdef CONFIG_Q40#include <asm/q40ints.h>#endif
#include "ints.h"
extern u32 auto_irqhandler_fixup[];extern u16 user_irqvec_fixup[];
static int m68k_first_user_vec;
static struct irq_chip auto_irq_chip = { .name = "auto", .irq_startup = m68k_irq_startup, .irq_shutdown = m68k_irq_shutdown,};
static struct irq_chip user_irq_chip = { .name = "user", .irq_startup = m68k_irq_startup, .irq_shutdown = m68k_irq_shutdown,};
/* * void init_IRQ(void) * * Parameters: None * * Returns: Nothing * * This function should be called during kernel startup to initialize * the IRQ handling routines. */
void __init init_IRQ(void){ int i;
for (i = IRQ_AUTO_1; i <= IRQ_AUTO_7; i++) irq_set_chip_and_handler(i, &auto_irq_chip, handle_simple_irq);
mach_init_IRQ();}
/** * m68k_setup_auto_interrupt * @handler: called from auto vector interrupts * * setup the handler to be called from auto vector interrupts instead of the * standard do_IRQ(), it will be called with irq numbers in the range * from IRQ_AUTO_1 - IRQ_AUTO_7. */void __init m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *)){ if (handler) *auto_irqhandler_fixup = (u32)handler; flush_icache();}
/** * m68k_setup_user_interrupt * @vec: first user vector interrupt to handle * @cnt: number of active user vector interrupts * * setup user vector interrupts, this includes activating the specified range * of interrupts, only then these interrupts can be requested (note: this is * different from auto vector interrupts). */void __init m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt){ int i;
BUG_ON(IRQ_USER + cnt > NR_IRQS); m68k_first_user_vec = vec; for (i = 0; i < cnt; i++) irq_set_chip_and_handler(i, &user_irq_chip, handle_simple_irq); *user_irqvec_fixup = vec - IRQ_USER; flush_icache();}
/** * m68k_setup_irq_controller * @chip: irq chip which controls specified irq * @handle: flow handler which handles specified irq * @irq: first irq to be managed by the controller * @cnt: number of irqs to be managed by the controller * * Change the controller for the specified range of irq, which will be used to * manage these irq. auto/user irq already have a default controller, which can * be changed as well, but the controller probably should use m68k_irq_startup/ * m68k_irq_shutdown. */void m68k_setup_irq_controller(struct irq_chip *chip, irq_flow_handler_t handle, unsigned int irq, unsigned int cnt){ int i;
for (i = 0; i < cnt; i++) { irq_set_chip(irq + i, chip); if (handle) irq_set_handler(irq + i, handle); }}
unsigned int m68k_irq_startup_irq(unsigned int irq){ if (irq <= IRQ_AUTO_7) vectors[VEC_SPUR + irq] = auto_inthandler; else vectors[m68k_first_user_vec + irq - IRQ_USER] = user_inthandler; return 0;}
unsigned int m68k_irq_startup(struct irq_data *data){ return m68k_irq_startup_irq(data->irq);}
void m68k_irq_shutdown(struct irq_data *data){ unsigned int irq = data->irq;
if (irq <= IRQ_AUTO_7) vectors[VEC_SPUR + irq] = bad_inthandler; else vectors[m68k_first_user_vec + irq - IRQ_USER] = bad_inthandler;}
unsigned int irq_canonicalize(unsigned int irq){#ifdef CONFIG_Q40 if (MACH_IS_Q40 && irq == 11) irq = 10;#endif return irq;}
EXPORT_SYMBOL(irq_canonicalize);
asmlinkage void handle_badint(struct pt_regs *regs){ atomic_inc(&irq_err_count); pr_warn("unexpected interrupt from %u\n", regs->vector);}