1 /* $NetBSD: vmparam.h,v 1.26 2003/08/07 16:27:47 agc Exp $ */
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34 #ifndef _MACHINE_VMPARAM_H_
35 #define _MACHINE_VMPARAM_H_
38 /*#include <arm/arm32/vmparam.h>
41 * Address space constants
45 * The line between user space and kernel space
46 * Mappings >= KERNEL_BASE are constant across all processes
48 #define KERNBASE 0xc0000000
51 * max number of non-contig chunks of physical RAM you can have
54 #define VM_PHYSSEG_MAX 32
57 * The physical address space is densely populated.
59 #define VM_PHYSSEG_DENSE
62 * Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool
63 * from which physical pages are allocated and VM_FREEPOOL_DIRECT is
64 * the pool from which physical pages for small UMA objects are
67 #define VM_NFREEPOOL 3
68 #define VM_FREEPOOL_CACHE 2
69 #define VM_FREEPOOL_DEFAULT 0
70 #define VM_FREEPOOL_DIRECT 1
73 * we support 2 free lists:
75 * - DEFAULT for all systems
76 * - ISADMA for the ISA DMA range on Sharks only
79 #define VM_NFREELIST 2
80 #define VM_FREELIST_DEFAULT 0
81 #define VM_FREELIST_ISADMA 1
84 * The largest allocation size is 1MB.
86 #define VM_NFREEORDER 9
89 * Only one memory domain.
96 * Disable superpage reservations.
98 #ifndef VM_NRESERVLEVEL
99 #define VM_NRESERVLEVEL 0
102 #define UPT_MAX_ADDRESS VADDR(UPTPTDI + 3, 0)
103 #define UPT_MIN_ADDRESS VADDR(UPTPTDI, 0)
105 #define VM_MIN_ADDRESS (0x00001000)
106 #ifdef ARM_USE_SMALL_ALLOC
108 * ARM_KERN_DIRECTMAP is used to make sure there's enough space between
109 * VM_MAXUSER_ADDRESS and KERNBASE to map the whole memory.
110 * It has to be a compile-time constant, even if arm_init_smallalloc(),
111 * which will do the mapping, gets the real amount of memory at runtime,
112 * because VM_MAXUSER_ADDRESS is a constant.
114 #ifndef ARM_KERN_DIRECTMAP
115 #define ARM_KERN_DIRECTMAP 512 * 1024 * 1024 /* 512 MB */
117 #define VM_MAXUSER_ADDRESS KERNBASE - ARM_KERN_DIRECTMAP
118 #else /* ARM_USE_SMALL_ALLOC */
119 #define VM_MAXUSER_ADDRESS KERNBASE
120 #endif /* ARM_USE_SMALL_ALLOC */
121 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
123 #define USRSTACK VM_MAXUSER_ADDRESS
125 /* initial pagein size of beginning of executable file */
126 #ifndef VM_INITIAL_PAGEIN
127 #define VM_INITIAL_PAGEIN 16
130 #ifndef VM_MIN_KERNEL_ADDRESS
131 #define VM_MIN_KERNEL_ADDRESS KERNBASE
134 #define VM_MAX_KERNEL_ADDRESS 0xffffffff
136 * Virtual size (bytes) for various kernel submaps.
140 #define VM_KMEM_SIZE (12*1024*1024)
143 #define MAXTSIZ (16*1024*1024)
144 #define DFLDSIZ (128*1024*1024)
145 #define MAXDSIZ (512*1024*1024)
146 #define DFLSSIZ (2*1024*1024)
147 #define MAXSSIZ (8*1024*1024)
148 #define SGROWSIZ (128*1024)
150 #ifdef ARM_USE_SMALL_ALLOC
151 #define UMA_MD_SMALL_ALLOC
152 #endif /* ARM_USE_SMALL_ALLOC */
154 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */
156 #endif /* _MACHINE_VMPARAM_H_ */