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