qemu/include/exec/cpu-interrupt.h

/*
 * Flags for use with cpu_interrupt()
 *
 * Copyright (c) 2003 Fabrice Bellard
 * SPDX-License-Identifier: LGPL-2.1-or-later
 */

#ifndef CPU_INTERRUPT_H
#define CPU_INTERRUPT_H

/*
 * The numbers assigned here are non-sequential in order to preserve binary
 * compatibility with the vmstate dump.  Bit 0 (0x0001) was previously used
 * for CPU_INTERRUPT_EXIT, and is cleared when loading the vmstate dump.
 */

/*
 * External hardware interrupt pending.
 * This is typically used for interrupts from devices.
 */
#define CPU_INTERRUPT_HARD        0x0002

/*
 * Exit the current TB.  This is typically used when some system-level device
 * makes some change to the memory mapping.  E.g. the a20 line change.
 */
#define CPU_INTERRUPT_EXITTB      0x0004

/* Halt the CPU.  */
#define CPU_INTERRUPT_HALT        0x0020

/* Debug event pending.  */
#define CPU_INTERRUPT_DEBUG       0x0080

/* Reset signal.  */
#define CPU_INTERRUPT_RESET       0x0400

/*
 * Several target-specific external hardware interrupts.  Each target/cpu.h
 * should define proper names based on these defines.
 */
#define CPU_INTERRUPT_TGT_EXT_0   0x0008
#define CPU_INTERRUPT_TGT_EXT_1   0x0010
#define CPU_INTERRUPT_TGT_EXT_2   0x0040
#define CPU_INTERRUPT_TGT_EXT_3   0x0200
#define CPU_INTERRUPT_TGT_EXT_4   0x1000

/*
 * Several target-specific internal interrupts.  These differ from the
 * preceding target-specific interrupts in that they are intended to
 * originate from within the cpu itself, typically in response to some
 * instruction being executed.  These, therefore, are not masked while
 * single-stepping within the debugger.
 */
#define CPU_INTERRUPT_TGT_INT_0   0x0100
#define CPU_INTERRUPT_TGT_INT_1   0x0800
#define CPU_INTERRUPT_TGT_INT_2   0x2000

/* First unused bit: 0x4000.  */

/* The set of all bits that should be masked when single-stepping.  */
#define CPU_INTERRUPT_SSTEP_MASK \
    (CPU_INTERRUPT_HARD          \
     | CPU_INTERRUPT_TGT_EXT_0   \
     | CPU_INTERRUPT_TGT_EXT_1   \
     | CPU_INTERRUPT_TGT_EXT_2   \
     | CPU_INTERRUPT_TGT_EXT_3   \
     | CPU_INTERRUPT_TGT_EXT_4)

#endif /* CPU_INTERRUPT_H */