82 lines
2.7 KiB
C
82 lines
2.7 KiB
C
/* $OpenBSD: amas.h,v 1.1 2009/05/07 11:30:27 ariane Exp $ */
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/*
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* Copyright (c) 2009 Ariane van der Steldt <ariane@stack.nl>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* Device: amas (AMD memory access/address switch).
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*
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* Driver for the amd athlon/opteron 64 address map.
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* This device is integrated in 64-bit Athlon and Opteron cpus
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* and contains mappings for memory to processor nodes.
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*
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* The AMD cpu can access memory in two ways: interleaved and non-interleaved.
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*
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* In interleaved mode, 16 MB regions are rotated across each node,
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* example for 2 nodes:
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* - region 0 (0-16 MB) on node 0.
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* - region 1 (16-32 MB) on node 1.
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* - region 2 (33-48 MB) on node 0.
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* - region 3 (48-64 MB) on node 1.
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* ...
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* - region 2 * N on node 0.
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* - region 2 * N + 1 on node 1.
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* Interleaved mode requires that each node has the same amount of physical
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* memory.
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*
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* In non-interleaved mode, memory for each node is a continuous address space,
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* example for 2 nodes:
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* - region 0 (all memory on CPU package 0) on node 0.
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* - region 1 (all memory on CPU package 1) on node 1.
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* Non-interleaved mode requires either that each node has the same amount of
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* physical memory or that memory holes are allowed between each node.
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*
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* Configuring memory for interleaved or non-interleaved mode is handled by
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* the BIOS.
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*/
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#ifndef _MACHINE_AMAS_H_
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#define _MACHINE_AMAS_H_
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#include <sys/types.h>
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#include <sys/device.h>
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#include <dev/pci/pcivar.h>
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#ifdef _KERNEL
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#define AMAS_MAX_NODES (8) /* AMAS supports 8 nodes at maximum. */
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/* Device configuration. */
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struct amas_softc {
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struct device sc_dev;
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/* PCI location of this device. */
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pcitag_t pa_tag;
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pci_chipset_tag_t pa_pc;
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int family;
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};
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/* AMAS driver. */
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extern struct cfdriver amas_cd;
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int amas_match(struct device*, void*, void*);
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void amas_attach(struct device*, struct device*, void*);
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int amas_intl_nodes(struct amas_softc*);
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void amas_get_pagerange(struct amas_softc*, int node, paddr_t*, paddr_t*);
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#endif /* _KERNEL */
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#endif /* _MACHINE_AMAS_H_ */
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