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8088699f79
type of software interrupt. Roughly, what used to be a bit in spending now maps to a swi thread. Each thread can have multiple handlers, just like a hardware interrupt thread. - Instead of using a bitmask of pending interrupts, we schedule the specific software interrupt thread to run, so spending, NSWI, and the shandlers array are no longer needed. We can now have an arbitrary number of software interrupt threads. When you register a software interrupt thread via sinthand_add(), you get back a struct intrhand that you pass to sched_swi() when you wish to schedule your swi thread to run. - Convert the name of 'struct intrec' to 'struct intrhand' as it is a bit more intuitive. Also, prefix all the members of struct intrhand with 'ih_'. - Make swi_net() a MI function since there is now no point in it being MD. Submitted by: cp
234 lines
7.7 KiB
C
234 lines
7.7 KiB
C
/*-
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* Copyright (c) 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _I386_ISA_INTR_MACHDEP_H_
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#define _I386_ISA_INTR_MACHDEP_H_
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/*
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* Low level interrupt code.
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*/
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#ifdef _KERNEL
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#if defined(SMP) || defined(APIC_IO)
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/*
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* XXX FIXME: rethink location for all IPI vectors.
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*/
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/*
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APIC TPR priority vector levels:
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0xff (255) +-------------+
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| | 15 (IPIs: Xspuriousint)
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0xf0 (240) +-------------+
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| | 14
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0xe0 (224) +-------------+
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| | 13
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0xd0 (208) +-------------+
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| | 12
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0xc0 (192) +-------------+
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| | 11
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0xb0 (176) +-------------+
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| | 10 (IPIs: Xcpustop)
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0xa0 (160) +-------------+
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| | 9 (IPIs: Xinvltlb)
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0x90 (144) +-------------+
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| | 8 (linux/BSD syscall, IGNORE FAST HW INTS)
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0x80 (128) +-------------+
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| | 7 (FAST_INTR 16-23)
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0x70 (112) +-------------+
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| | 6 (FAST_INTR 0-15)
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0x60 (96) +-------------+
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| | 5 (IGNORE HW INTS)
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0x50 (80) +-------------+
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| | 4 (2nd IO APIC)
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0x40 (64) +------+------+
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| | | 3 (upper APIC hardware INTs: PCI)
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0x30 (48) +------+------+
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| | 2 (start of hardware INTs: ISA)
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0x20 (32) +-------------+
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| | 1 (exceptions, traps, etc.)
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0x10 (16) +-------------+
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| | 0 (exceptions, traps, etc.)
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0x00 (0) +-------------+
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*/
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/* IDT vector base for regular (aka. slow) and fast interrupts */
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#define TPR_SLOW_INTS 0x20
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#define TPR_FAST_INTS 0x60
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/* blocking values for local APIC Task Priority Register */
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#define TPR_BLOCK_HWI 0x4f /* hardware INTs */
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#define TPR_IGNORE_HWI 0x5f /* ignore INTs */
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#define TPR_BLOCK_FHWI 0x7f /* hardware FAST INTs */
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#define TPR_IGNORE_FHWI 0x8f /* ignore FAST INTs */
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#define TPR_BLOCK_XINVLTLB 0x9f /* */
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#define TPR_BLOCK_XCPUSTOP 0xaf /* */
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#define TPR_BLOCK_ALL 0xff /* all INTs */
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#ifdef TEST_TEST1
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/* put a 'fake' HWI in top of APIC prio 0x3x, 32 + 31 = 63 = 0x3f */
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#define XTEST1_OFFSET (ICU_OFFSET + 31)
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#endif /** TEST_TEST1 */
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/* TLB shootdowns */
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#define XINVLTLB_OFFSET (ICU_OFFSET + 112)
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#ifdef BETTER_CLOCK
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/* inter-cpu clock handling */
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#define XCPUCHECKSTATE_OFFSET (ICU_OFFSET + 113)
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#endif
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/* inter-CPU rendezvous */
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#define XRENDEZVOUS_OFFSET (ICU_OFFSET + 114)
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/* IPI to generate an additional software trap at the target CPU */
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#define XCPUAST_OFFSET (ICU_OFFSET + 48)
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/* IPI to signal the CPU holding the ISR lock that another IRQ has appeared */
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#define XFORWARD_IRQ_OFFSET (ICU_OFFSET + 49)
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/* IPI to signal CPUs to stop and wait for another CPU to restart them */
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#define XCPUSTOP_OFFSET (ICU_OFFSET + 128)
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/*
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* Note: this vector MUST be xxxx1111, 32 + 223 = 255 = 0xff:
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*/
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#define XSPURIOUSINT_OFFSET (ICU_OFFSET + 223)
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#endif /* SMP || APIC_IO */
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#ifndef LOCORE
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/*
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* Type of the first (asm) part of an interrupt handler.
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*/
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typedef void inthand_t __P((u_int cs, u_int ef, u_int esp, u_int ss));
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#define IDTVEC(name) __CONCAT(X,name)
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extern char eintrnames[]; /* end of intrnames[] */
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extern u_long intrcnt[]; /* counts for for each device and stray */
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extern char intrnames[]; /* string table containing device names */
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extern u_long *intr_countp[]; /* pointers into intrcnt[] */
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extern driver_intr_t *intr_handler[]; /* C entry points of intr handlers */
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extern struct ithd *ithds[];
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extern void *intr_unit[]; /* cookies to pass to intr handlers */
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extern struct ithd softinterrupt; /* soft interrupt thread */
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inthand_t
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IDTVEC(fastintr0), IDTVEC(fastintr1),
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IDTVEC(fastintr2), IDTVEC(fastintr3),
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IDTVEC(fastintr4), IDTVEC(fastintr5),
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IDTVEC(fastintr6), IDTVEC(fastintr7),
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IDTVEC(fastintr8), IDTVEC(fastintr9),
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IDTVEC(fastintr10), IDTVEC(fastintr11),
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IDTVEC(fastintr12), IDTVEC(fastintr13),
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IDTVEC(fastintr14), IDTVEC(fastintr15);
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inthand_t
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IDTVEC(intr0), IDTVEC(intr1), IDTVEC(intr2), IDTVEC(intr3),
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IDTVEC(intr4), IDTVEC(intr5), IDTVEC(intr6), IDTVEC(intr7),
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IDTVEC(intr8), IDTVEC(intr9), IDTVEC(intr10), IDTVEC(intr11),
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IDTVEC(intr12), IDTVEC(intr13), IDTVEC(intr14), IDTVEC(intr15);
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#if defined(SMP) || defined(APIC_IO)
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inthand_t
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IDTVEC(fastintr16), IDTVEC(fastintr17),
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IDTVEC(fastintr18), IDTVEC(fastintr19),
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IDTVEC(fastintr20), IDTVEC(fastintr21),
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IDTVEC(fastintr22), IDTVEC(fastintr23);
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inthand_t
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IDTVEC(intr16), IDTVEC(intr17), IDTVEC(intr18), IDTVEC(intr19),
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IDTVEC(intr20), IDTVEC(intr21), IDTVEC(intr22), IDTVEC(intr23);
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inthand_t
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Xinvltlb, /* TLB shootdowns */
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#ifdef BETTER_CLOCK
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Xcpucheckstate, /* Check cpu state */
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#endif
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Xcpuast, /* Additional software trap on other cpu */
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Xforward_irq, /* Forward irq to cpu holding ISR lock */
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Xcpustop, /* CPU stops & waits for another CPU to restart it */
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Xspuriousint, /* handle APIC "spurious INTs" */
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Xrendezvous; /* handle CPU rendezvous */
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#ifdef TEST_TEST1
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inthand_t
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Xtest1; /* 'fake' HWI at top of APIC prio 0x3x, 32+31 = 0x3f */
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#endif /** TEST_TEST1 */
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#endif /* SMP || APIC_IO */
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#ifdef PC98
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#define ICU_IMR_OFFSET 2 /* IO_ICU{1,2} + 2 */
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#define ICU_SLAVEID 7
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#else
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#define ICU_IMR_OFFSET 1 /* IO_ICU{1,2} + 1 */
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#define ICU_SLAVEID 2
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#endif
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#ifdef APIC_IO
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/*
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* This is to accommodate "mixed-mode" programming for
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* motherboards that don't connect the 8254 to the IO APIC.
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*/
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#define AUTO_EOI_1 1
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#endif
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#define NR_INTRNAMES (1 + ICU_LEN + 2 * ICU_LEN)
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void isa_defaultirq __P((void));
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int isa_nmi __P((int cd));
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int icu_setup __P((int intr, driver_intr_t *func, void *arg,
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int flags));
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int icu_unset __P((int intr, driver_intr_t *handler));
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/*
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* WARNING: These are internal functions and not to be used by device drivers!
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* They are subject to change without notice.
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*/
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struct intrhand *inthand_add(const char *name, int irq, driver_intr_t handler,
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void *arg, int pri, int flags);
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int inthand_remove(struct intrhand *idesc);
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void sched_ithd(void *);
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void ithd_loop(void *);
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void start_softintr(void *);
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void intr_soft(void *);
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#endif /* LOCORE */
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#endif /* _KERNEL */
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#endif /* !_I386_ISA_INTR_MACHDEP_H_ */
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