diff options
Diffstat (limited to 'arch/s390/kernel/s390_ext.c')
| -rw-r--r-- | arch/s390/kernel/s390_ext.c | 145 |
1 files changed, 0 insertions, 145 deletions
diff --git a/arch/s390/kernel/s390_ext.c b/arch/s390/kernel/s390_ext.c deleted file mode 100644 index bd1db508e8a..00000000000 --- a/arch/s390/kernel/s390_ext.c +++ /dev/null @@ -1,145 +0,0 @@ -/* - * arch/s390/kernel/s390_ext.c - * - * S390 version - * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation - * Author(s): Holger Smolinski (Holger.Smolinski@de.ibm.com), - * Martin Schwidefsky (schwidefsky@de.ibm.com) - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/ftrace.h> -#include <linux/errno.h> -#include <linux/kernel_stat.h> -#include <linux/interrupt.h> -#include <asm/cputime.h> -#include <asm/lowcore.h> -#include <asm/s390_ext.h> -#include <asm/irq_regs.h> -#include <asm/irq.h> -#include "entry.h" - -/* - * 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. - */ -ext_int_info_t *ext_int_hash[256] = { NULL, }; - -static inline int ext_hash(__u16 code) -{ - return (code + (code >> 9)) & 0xff; -} - -int register_external_interrupt(__u16 code, ext_int_handler_t handler) -{ - ext_int_info_t *p; - int index; - - p = kmalloc(sizeof(ext_int_info_t), GFP_ATOMIC); - if (p == NULL) - 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; -} - -int register_early_external_interrupt(__u16 code, ext_int_handler_t handler, - ext_int_info_t *p) -{ - int index; - - if (p == NULL) - return -EINVAL; - p->code = code; - p->handler = handler; - index = ext_hash(code); - p->next = ext_int_hash[index]; - ext_int_hash[index] = p; - return 0; -} - -int unregister_external_interrupt(__u16 code, ext_int_handler_t handler) -{ - ext_int_info_t *p, *q; - int index; - - index = ext_hash(code); - q = NULL; - p = ext_int_hash[index]; - while (p != NULL) { - if (p->code == code && p->handler == handler) - break; - q = p; - p = p->next; - } - if (p == NULL) - return -ENOENT; - if (q != NULL) - q->next = p->next; - else - ext_int_hash[index] = p->next; - kfree(p); - return 0; -} - -int unregister_early_external_interrupt(__u16 code, ext_int_handler_t handler, - ext_int_info_t *p) -{ - ext_int_info_t *q; - int index; - - if (p == NULL || p->code != code || p->handler != handler) - return -EINVAL; - index = ext_hash(code); - q = ext_int_hash[index]; - if (p != q) { - while (q != NULL) { - if (q->next == p) - break; - q = q->next; - } - if (q == NULL) - return -ENOENT; - q->next = p->next; - } else - ext_int_hash[index] = p->next; - return 0; -} - -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; - ext_int_info_t *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); -} - -EXPORT_SYMBOL(register_external_interrupt); -EXPORT_SYMBOL(unregister_external_interrupt); |