| /* |
| * 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/kernel_stat.h> |
| #include <linux/errno.h> |
| #include <linux/init.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 |
| |
| 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; |
| |
| /* assembly irq entry code relies on this... */ |
| if (HARDIRQ_MASK != 0x00ff0000) { |
| extern void hardirq_mask_is_broken(void); |
| hardirq_mask_is_broken(); |
| } |
| |
| 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); |
| } |