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/* $OpenBSD: vmparam.h,v 1.5 2009/11/22 00:07:04 miod Exp $ */
/* public domain */
#ifndef _SGI_VMPARAM_H_
#define _SGI_VMPARAM_H_
#define VM_PHYSSEG_MAX 32 /* Max number of physical memory segments */
/*
* On Origin and Octane families, DMA to 32-bit PCI devices is restricted.
*
* Systems with physical memory after the 2GB boundary needs to ensure
* memory which may used for DMA transfers is allocated from the low
* memory range.
*
* Other systems, like the O2, do not have such a restriction, but can not
* have more than 2GB of physical memory, so this doesn't affect them.
*/
#define VM_NFREELIST 2
#define VM_FREELIST_DMA32 1 /* memory suitable for 32-bit DMA */
/*
* On systems with may use R5000 processors, we limit the kernel virtual
* address space to KSSEG and KSEG3.
* On systems with R10000 family processors, we use the XKSEG which allows
* for a much larger virtual memory size.
*
* All Octane and Origin class systems are R10000 family based only,
* so TGT_COHERENT is safe to use so far.
*/
#ifdef TGT_COHERENT
#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0xc000000000000000L)
#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xc000000040000000L)
#else
#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0xffffffffc0000000L)
#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xfffffffffffff000L)
#endif
#include <mips64/vmparam.h>
#endif /* _SGI_VMPARAM_H_ */
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