interrupt.s revision 5cd376e8b7030707d78315f63adb4bb2b4d9963e
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * CDDL HEADER START
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * The contents of this file are subject to the terms of the
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Common Development and Distribution License (the "License").
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * You may not use this file except in compliance with the License.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * See the License for the specific language governing permissions
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9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * When distributing Covered Code, include this CDDL HEADER in each
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * If applicable, add the following below this CDDL HEADER, with the
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9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * information: Portions Copyright [yyyy] [name of copyright owner]
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9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor/* Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor/* Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor/* All Rights Reserved */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor/* Copyright (c) 1987, 1988 Microsoft Corporation */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor/* All Rights Reserved */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor#else /* __lint */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor#endif /* lint */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor#else /* __lint */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Common register usage:
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * %r12 trap trace pointer
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor INTGATE_INIT_KERNEL_FLAGS /* (set kernel rflags values) */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * At the end of TRACE_PTR %r12 points to the current TRAPTRACE entry
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor TRACE_PTR(%r12, %rax, %eax, %rdx, $TT_INTERRUPT)
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor /* Uses labels 8 and 9 */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor TRACE_REGS(%r12, %rsp, %rax, %rbx) /* Uses label 9 */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor TRACE_STAMP(%r12) /* Clobbers %eax, %edx, uses 9 */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor movq %r12, %rsi /* pass traptrace record pointer */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor /*NOTREACHED*/
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * At the end of TRACE_PTR %esi points to the current TRAPTRACE entry
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor TRACE_PTR(%esi, %eax, %eax, %edx, $TT_INTERRUPT)
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor /* Uses labels 8 and 9 */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor TRACE_REGS(%esi, %esp, %eax, %ebx) /* Uses label 9 */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor TRACE_STAMP(%esi) /* Clobbers %eax, %edx, uses 9 */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor call *do_interrupt_common /* interrupt service routine */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor /*NOTREACHED*/
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor#endif /* __i386 */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Declare a uintptr_t which has the size of _interrupt to enable stack
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * traceback code to know when a regs structure is on the stack.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor#endif /* __lint */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor#else /* __lint */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor / If we're here, we're being called from splx() to fake a soft
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor / interrupt (note that interrupts are still disabled from splx()).
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor / We execute this code when a soft interrupt is posted at
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor / level higher than the CPU's current spl; when spl is lowered in
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor / splx(), it will see the softint and jump here. We'll do exactly
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor / what a trap would do: push our flags, %cs, %eip, error code
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor / and trap number (T_SOFTINT). The cmnint() code will see T_SOFTINT
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * In 64-bit mode, iretq -always- pops all five regs
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * Imitate the 16-byte auto-align of the stack, and the
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor * zero-ed out %ss value.
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor#endif /* __i386 */
9e39c5ba00a55fa05777cc94b148296af305e135Bill Taylor#endif /* __lint */