96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
/* $NetBSD: vmparam.h,v 1.18 2014/01/25 15:16:50 christos Exp $ */
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#ifndef _POWERPC_VMPARAM_H_
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#define _POWERPC_VMPARAM_H_
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#ifdef _KERNEL_OPT
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#include "opt_modular.h"
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#include "opt_ppcarch.h"
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#include "opt_uvm.h"
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#endif
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/*
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* These are common for BOOKE, IBM4XX, and OEA
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*/
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#define VM_FREELIST_DEFAULT 0
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#define VM_FREELIST_FIRST256 1
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#define VM_FREELIST_FIRST16 2
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#define VM_NFREELIST 3
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#define VM_PHYSSEG_MAX 16
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/*
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* The address to which unspecified mapping requests default
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* Put the stack in it's own segment and start mmaping at the
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* top of the next lower segment.
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*/
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#define __USE_TOPDOWN_VM
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#define VM_DEFAULT_ADDRESS_TOPDOWN(da, sz) \
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((VM_MAXUSER_ADDRESS - MAXSSIZ) - round_page(sz))
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#define VM_DEFAULT_ADDRESS_BOTTOMUP(da, sz) \
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round_page((vaddr_t)(da) + (vsize_t)maxdmap)
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#if defined(_MODULE) || defined(MODULAR)
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/*
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* If we are a module or a modular kernel, then we need to defined the range
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* of our varible page sizes since BOOKE and OEA use 4KB pages while IBM4XX
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* use 16KB pages.
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*/
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#define MIN_PAGE_SIZE 4096 /* BOOKE/OEA */
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#define MAX_PAGE_SIZE 16384 /* IBM4XX */
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#endif
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#if defined(_MODULE)
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#if defined(_RUMPKERNEL)
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/*
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* Safe definitions for RUMP kernels
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*/
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#define VM_MAXUSER_ADDRESS 0x7fff8000
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#define VM_MIN_ADDRESS 0x00000000
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#define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
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#define MAXDSIZ (1024*1024*1024)
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#define MAXSSIZ (32*1024*1024)
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#define MAXTSIZ (256*1024*1024)
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#else /* !_RUMPKERNEL */
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/*
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* Some modules need some of the constants but those vary between the variants
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* so those constants are exported as linker symbols so they don't take up any
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* space but also avoid an extra load to put into a register.
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*/
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extern const char __USRSTACK; /* let the linker resolve it */
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#define USRSTACK ((vaddr_t)(uintptr_t)&__USRSTACK)
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#endif /* !_RUMPKERNEL */
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#else /* !_MODULE */
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#if defined(PPC_BOOKE)
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#include <powerpc/booke/vmparam.h>
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#elif defined(PPC_IBM4XX)
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#include <powerpc/ibm4xx/vmparam.h>
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#elif defined(PPC_OEA) || defined (PPC_OEA64) || defined (PPC_OEA64_BRIDGE)
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#include <powerpc/oea/vmparam.h>
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#elif defined(_KERNEL)
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#error unknown PPC variant
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#endif
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#endif /* !_MODULE */
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#if defined(MODULAR) || defined(_MODULAR)
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/*
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* If we are a module or support modules, we need to define a compatible
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* pmap_physseg since IBM4XX uses one. This will waste a tiny of space
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* but is needed for compatibility.
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*/
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#ifndef __HAVE_PMAP_PHYSSEG
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#define __HAVE_PMAP_PHYSSEG
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struct pmap_physseg {
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uintptr_t pmseg_dummy[2];
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};
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#endif
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__CTASSERT(sizeof(struct pmap_physseg) == sizeof(uintptr_t) * 2);
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#endif /* MODULAR || _MODULE */
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#endif /* !_POWERPC_VMPARAM_H_ */
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