diff options
Diffstat (limited to 'arch/s390/kernel/s390_ext.c')
-rw-r--r-- | arch/s390/kernel/s390_ext.c | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/arch/s390/kernel/s390_ext.c b/arch/s390/kernel/s390_ext.c deleted file mode 100644 index 87b5c532abf..00000000000 --- a/arch/s390/kernel/s390_ext.c +++ /dev/null @@ -1,131 +0,0 @@ -/* - * Copyright IBM Corp. 1999,2010 - * Author(s): Holger Smolinski <Holger.Smolinski@de.ibm.com>, - * Martin Schwidefsky <schwidefsky@de.ibm.com>, - */ - -#include <linux/kernel_stat.h> -#include <linux/interrupt.h> -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/ftrace.h> -#include <linux/errno.h> -#include <linux/slab.h> -#include <asm/s390_ext.h> -#include <asm/irq_regs.h> -#include <asm/cputime.h> -#include <asm/lowcore.h> -#include <asm/irq.h> -#include "entry.h" - -struct ext_int_info { - struct ext_int_info *next; - ext_int_handler_t handler; - __u16 code; -}; - -/* - * ext_int_hash[index] is the start of the list for all external interrupts - * that hash to this index. With the current set of external interrupts - * (0x1202 external call, 0x1004 cpu timer, 0x2401 hwc console, 0x4000 - * iucv and 0x2603 pfault) this is always the first element. - */ -static struct ext_int_info *ext_int_hash[256]; - -static inline int ext_hash(__u16 code) -{ - return (code + (code >> 9)) & 0xff; -} - -int register_external_interrupt(__u16 code, ext_int_handler_t handler) -{ - struct ext_int_info *p; - int index; - - p = kmalloc(sizeof(*p), GFP_ATOMIC); - if (!p) - return -ENOMEM; - p->code = code; - p->handler = handler; - index = ext_hash(code); - p->next = ext_int_hash[index]; - ext_int_hash[index] = p; - return 0; -} -EXPORT_SYMBOL(register_external_interrupt); - -int unregister_external_interrupt(__u16 code, ext_int_handler_t handler) -{ - struct ext_int_info *p, *q; - int index; - - index = ext_hash(code); - q = NULL; - p = ext_int_hash[index]; - while (p) { - if (p->code == code && p->handler == handler) - break; - q = p; - p = p->next; - } - if (!p) - return -ENOENT; - if (q) - q->next = p->next; - else - ext_int_hash[index] = p->next; - kfree(p); - return 0; -} -EXPORT_SYMBOL(unregister_external_interrupt); - -void __irq_entry do_extint(struct pt_regs *regs, unsigned int ext_int_code, - unsigned int param32, unsigned long param64) -{ - struct pt_regs *old_regs; - unsigned short code; - struct ext_int_info *p; - int index; - - code = (unsigned short) ext_int_code; - old_regs = set_irq_regs(regs); - s390_idle_check(regs, S390_lowcore.int_clock, - S390_lowcore.async_enter_timer); - irq_enter(); - if (S390_lowcore.int_clock >= S390_lowcore.clock_comparator) - /* Serve timer interrupts first. */ - clock_comparator_work(); - kstat_cpu(smp_processor_id()).irqs[EXTERNAL_INTERRUPT]++; - if (code != 0x1004) - __get_cpu_var(s390_idle).nohz_delay = 1; - index = ext_hash(code); - for (p = ext_int_hash[index]; p; p = p->next) { - if (likely(p->code == code)) - p->handler(ext_int_code, param32, param64); - } - irq_exit(); - set_irq_regs(old_regs); -} - -static DEFINE_SPINLOCK(sc_irq_lock); -static int sc_irq_refcount; - -void service_subclass_irq_register(void) -{ - spin_lock(&sc_irq_lock); - if (!sc_irq_refcount) - ctl_set_bit(0, 9); - sc_irq_refcount++; - spin_unlock(&sc_irq_lock); -} -EXPORT_SYMBOL(service_subclass_irq_register); - -void service_subclass_irq_unregister(void) -{ - spin_lock(&sc_irq_lock); - sc_irq_refcount--; - if (!sc_irq_refcount) - ctl_clear_bit(0, 9); - spin_unlock(&sc_irq_lock); -} -EXPORT_SYMBOL(service_subclass_irq_unregister); |