Quelle  irq.h   Sprache: C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_IRQ_H
#define _ASM_IRQ_H

#define EXT_INTERRUPT 0
#define IO_INTERRUPT 1
#define THIN_INTERRUPT 2

#define NR_IRQS_BASE 3

#define NR_IRQS NR_IRQS_BASE
#define NR_IRQS_LEGACY NR_IRQS_BASE

/* External interruption codes */
#define EXT_IRQ_INTERRUPT_KEY 0x0040
#define EXT_IRQ_CLK_COMP 0x1004
#define EXT_IRQ_CPU_TIMER 0x1005
#define EXT_IRQ_WARNING_TRACK 0x1007
#define EXT_IRQ_MALFUNC_ALERT 0x1200
#define EXT_IRQ_EMERGENCY_SIG 0x1201
#define EXT_IRQ_EXTERNAL_CALL 0x1202
#define EXT_IRQ_TIMING_ALERT 0x1406
#define EXT_IRQ_MEASURE_ALERT 0x1407
#define EXT_IRQ_SERVICE_SIG 0x2401
#define EXT_IRQ_CP_SERVICE 0x2603
#define EXT_IRQ_IUCV  0x4000

#ifndef __ASSEMBLER__

#include <linux/hardirq.h>
#include <linux/percpu.h>
#include <linux/cache.h>
#include <linux/types.h>
#include <asm/ctlreg.h>

enum interruption_class {
 IRQEXT_CLK,
 IRQEXT_EXC,
 IRQEXT_EMS,
 IRQEXT_TMR,
 IRQEXT_TLA,
 IRQEXT_PFL,
 IRQEXT_DSD,
 IRQEXT_VRT,
 IRQEXT_SCP,
 IRQEXT_IUC,
 IRQEXT_CMS,
 IRQEXT_CMC,
 IRQEXT_FTP,
 IRQEXT_WTI,
 IRQIO_CIO,
 IRQIO_DAS,
 IRQIO_C15,
 IRQIO_C70,
 IRQIO_TAP,
 IRQIO_VMR,
 IRQIO_CTC,
 IRQIO_ADM,
 IRQIO_CSC,
 IRQIO_VIR,
 IRQIO_QAI,
 IRQIO_APB,
 IRQIO_PCF,
 IRQIO_PCD,
 IRQIO_MSI,
 IRQIO_VAI,
 IRQIO_GAL,
 NMI_NMI,
 CPU_RST,
 NR_ARCH_IRQS
};

struct irq_stat {
 unsigned int irqs[NR_ARCH_IRQS];
};

DECLARE_PER_CPU_SHARED_ALIGNED(struct irq_stat, irq_stat);

static __always_inline void inc_irq_stat(enum interruption_class irq)
{
 __this_cpu_inc(irq_stat.irqs[irq]);
}

struct ext_code {
 union {
  struct {
   unsigned short subcode;
   unsigned short code;
  };
  unsigned int int_code;
 };
};

typedef void (*ext_int_handler_t)(struct ext_code, unsigned int, unsigned long);

int register_external_irq(u16 code, ext_int_handler_t handler);
int unregister_external_irq(u16 code, ext_int_handler_t handler);

enum irq_subclass {
 IRQ_SUBCLASS_MEASUREMENT_ALERT = 5,
 IRQ_SUBCLASS_SERVICE_SIGNAL = 9,
 IRQ_SUBCLASS_WARNING_TRACK = 33,
};

#define CR0_IRQ_SUBCLASS_MASK       \
 (CR0_WARNING_TRACK     | \
  CR0_MALFUNCTION_ALERT_SUBMASK    | \
  CR0_EMERGENCY_SIGNAL_SUBMASK    | \
  CR0_EXTERNAL_CALL_SUBMASK    | \
  CR0_CLOCK_COMPARATOR_SUBMASK    | \
  CR0_CPU_TIMER_SUBMASK     | \
  CR0_SERVICE_SIGNAL_SUBMASK    | \
  CR0_INTERRUPT_KEY_SUBMASK    | \
  CR0_MEASUREMENT_ALERT_SUBMASK    | \
  CR0_ETR_SUBMASK     | \
  CR0_IUCV)

void irq_subclass_register(enum irq_subclass subclass);
void irq_subclass_unregister(enum irq_subclass subclass);

#define irq_canonicalize(irq)  (irq)

#endif /* __ASSEMBLER__ */

#endif /* _ASM_IRQ_H */