a51a1d8cdd
reserving RAM in the bus_mem extent map. Problem pointed out by Artur Grabowski. - Work around a slightly annoying bit of behavior exhibited by the UP1000 firmware. The UP1000 firmware reports the space consumed by the "ISA hole" in the same MDDT entry as two chunks of RAM (on either side of the hole) used by the PALcode, all as one "reserved for PALcode" chunk. We must take this into account when reserving RAM in the bus_mem extent map.
143 lines
4.6 KiB
C
143 lines
4.6 KiB
C
/* $NetBSD: irongate_bus_mem.c,v 1.7 2001/04/17 21:52:00 thorpej Exp $ */
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/*-
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* Copyright (c) 2000, 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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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 NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(1, "$NetBSD: irongate_bus_mem.c,v 1.7 2001/04/17 21:52:00 thorpej Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/syslog.h>
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#include <sys/device.h>
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#include <uvm/uvm_extern.h>
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#include <machine/bus.h>
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#include <alpha/pci/irongatereg.h>
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#include <alpha/pci/irongatevar.h>
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#define CHIP irongate
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#define CHIP_EX_MALLOC_SAFE(v) (((struct irongate_config *)(v))->ic_mallocsafe)
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#define CHIP_MEM_EXTENT(v) (((struct irongate_config *)(v))->ic_mem_ex)
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#define CHIP_MEM_SYS_START(v) IRONGATE_MEM_BASE
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/*
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* AMD 751 core logic appears on EV6. We require at least EV56
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* support for the assembler to emit BWX opcodes.
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*/
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__asm(".arch ev6");
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#include <alpha/pci/pci_bwx_bus_mem_chipdep.c>
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#include <sys/kcore.h>
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#include <dev/isa/isareg.h>
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extern phys_ram_seg_t mem_clusters[];
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extern int mem_cluster_cnt;
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void
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irongate_bus_mem_init2(bus_space_tag_t t, void *v)
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{
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u_long size, start, end;
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int i, error;
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/*
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* Since the AMD 751 doesn't have DMA windows, we need to
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* allocate RAM out of the extent map.
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*/
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for (i = 0; i < mem_cluster_cnt; i++) {
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start = mem_clusters[i].start;
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size = mem_clusters[i].size & ~PAGE_MASK;
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end = mem_clusters[i].start + size;
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if (start <= IOM_BEGIN && end >= IOM_END) {
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/*
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* The ISA hole lies somewhere in this
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* memory cluster. The UP1000 firmware
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* doesn't report this to us properly,
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* so we have to cope, since devices are
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* mapped into the ISA hole, but RAM is
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* not.
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*
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* Sigh, the UP1000 is a really cool machine,
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* but it is sometimes too PC-like for my
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* taste.
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*/
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if (start < IOM_BEGIN) {
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error = extent_alloc_region(CHIP_MEM_EXTENT(v),
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start, (IOM_BEGIN - start),
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EX_NOWAIT |
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(CHIP_EX_MALLOC_SAFE(v) ? EX_MALLOCOK : 0));
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if (error) {
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printf("WARNING: unable to reserve "
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"chunk from mem cluster %d "
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"(0x%lx - 0x%lx)\n", i,
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start, (u_long) IOM_BEGIN - 1);
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}
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}
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if (end > IOM_END) {
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error = extent_alloc_region(CHIP_MEM_EXTENT(v),
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IOM_END, (end - IOM_END),
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EX_NOWAIT |
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(CHIP_EX_MALLOC_SAFE(v) ? EX_MALLOCOK : 0));
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if (error) {
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printf("WARNING: unable to reserve "
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"chunk from mem cluster %d "
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"(0x%lx - 0x%lx)\n", i,
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(u_long) IOM_END, end - 1);
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}
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}
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} else {
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error = extent_alloc_region(CHIP_MEM_EXTENT(v),
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start, size,
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EX_NOWAIT |
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(CHIP_EX_MALLOC_SAFE(v) ? EX_MALLOCOK : 0));
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if (error) {
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printf("WARNING: unable reserve mem cluster %d "
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"(0x%lx - 0x%lx)\n", i, start,
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start + (size - 1));
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}
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}
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}
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}
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