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with the INTR_FILTER-enabled MI code. Basically this consists of
registering an interrupt controller (of which there can be multiple
and optionally different ones either per host-to-foo bridge or shared
amongst host-to-foo bridges in any one machine) along with an interrupt
vector as specific argument for all the interrupt vectors used by a
given host-to-foo bridge (roughly similar to registering interrupt
sources on amd64 and i386), providing functions to enable, clear and
disable the interrupts of the children beneath the bridge.
This also includes:
- No longer entering a critical section in tl0_intr() and tl1_intr()
for executing interrupt handlers but rather let the handlers enter
it themselves so in the case of intr_event_handle() we don't enter
a nested critical section.
- Adding infrastructure for binding delivery of interrupt vectors to
specific CPUs which later on can be interfaced with the code from
amd64/i386 for binding interrupts to specific CPUs.
- Getting rid of the wrapper hack introduced along the lines of the
API changes for INTR_FILTER which as a side-effect caused interrupts
associated with ithread handlers only to get the elevated priority
of those associated with filters ("fast handlers") (this removes the
hack also in the non-INTR_FILTER case).
- Disabling (by not clearing) an interrupt in the interrupt controller
until all associated handlers have been executed, which is crucial
for the typical locking strategy of NIC drivers in order to work
correctly in case of shared interrupts. This was a more or less
theoretical problem on sparc64 though, as shared interrupts are
rather uncommon there except for the on-board SCCs and UARTs.
Note that due to the behavior of at least of some of the interrupt
controllers used on sparc64 an enable+EOI instead of a disable+EOI
approach (as implied by the INTR_FILTER MI code and implemented on
other architectures) is used as the latter can cause lost interrupts
or in the worst case interrupt starvation.
o Correct a typo in sbus_alloc_resource() which caused (pass-through)
allocations to only work down to the grandchildren of the bus, which
wasn't a real problem so far as we don't support any devices which are
great-grandchildren or greater of a U2S bridge, yet.
o In fhc(4) use bus_{read,write}_4() instead of bus_space_{read,write}_4()
in order to get rid of sc_bh and sc_bt in the fhc_softc. Also get rid
of some other unneeded members in fhc_softc.
Reviewed by: marcel (earlier version)
Approved by: re (kensmith)
69 lines
3.1 KiB
C
69 lines
3.1 KiB
C
/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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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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* 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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* form: @(#)sbusreg.h 8.1 (Berkeley) 6/11/93
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* from: NetBSD: iommureg.h,v 1.6 2001/07/20 00:07:13 eeh Exp
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_BUS_COMMON_H_
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#define _MACHINE_BUS_COMMON_H_
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#define INTMAP_V 0x080000000LL /* Interrupt valid (enabled) */
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#define INTMAP_TID_MASK 0x07c000000LL /* UPA target ID */
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#define INTMAP_TID_SHIFT 26
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#define INTMAP_IGN_MASK 0x0000007c0LL /* Interrupt group no. */
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#define INTMAP_IGN_SHIFT 6
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#define INTMAP_INO_MASK 0x00000003fLL /* Interrupt number */
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#define INTMAP_INR_MASK (INTMAP_IGN_MASK | INTMAP_INO_MASK)
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#define INTMAP_SBUSSLOT_MASK 0x000000018LL /* SBus slot # */
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#define INTMAP_PCIBUS_MASK 0x000000010LL /* PCI bus number (A or B) */
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#define INTMAP_PCISLOT_MASK 0x00000000cLL /* PCI slot # */
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#define INTMAP_PCIINT_MASK 0x000000003LL /* PCI interrupt #A,#B,#C,#D */
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#define INTMAP_OBIO_MASK 0x000000020LL /* Onboard device */
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#define INTIGN(x) (((x) & INTMAP_IGN_MASK) >> INTMAP_IGN_SHIFT)
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#define INTVEC(x) ((x) & INTMAP_INR_MASK)
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#define INTSLOT(x) (((x) >> 3) & 0x7)
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#define INTPRI(x) ((x) & 0x7)
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#define INTINO(x) ((x) & INTMAP_INO_MASK)
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#define INTMAP_ENABLE(mr, mid) \
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(((mr) & ~INTMAP_TID_MASK) | ((mid) << INTMAP_TID_SHIFT) | INTMAP_V)
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#define INTMAP_VEC(ign, inr) \
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(((ign) << INTMAP_IGN_SHIFT) | (inr))
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/* counter-timer support. */
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void sparc64_counter_init(bus_space_tag_t tag, bus_space_handle_t handle,
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bus_addr_t offset);
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#endif /* !_MACHINE_BUS_COMMON_H_ */
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