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 * Machine dependent constants for ARM.
42 * Virtual memory related constants, all in bytes
45 #define MAXTSIZ (64UL*1024*1024) /* max text size */
48 #define DFLDSIZ (128UL*1024*1024) /* initial data size limit */
51 #define MAXDSIZ (512UL*1024*1024) /* max data size */
54 #define DFLSSIZ (2UL*1024*1024) /* initial stack size limit */
57 #define MAXSSIZ (8UL*1024*1024) /* max stack size */
60 #define SGROWSIZ (128UL*1024) /* amount to grow stack */
64 * Address space constants
68 * The line between user space and kernel space
69 * Mappings >= KERNEL_BASE are constant across all processes
71 #define KERNBASE 0xc0000000
74 * max number of non-contig chunks of physical RAM you can have
77 #define VM_PHYSSEG_MAX 32
80 * The physical address space is densely populated.
82 #define VM_PHYSSEG_DENSE
85 * Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool
86 * from which physical pages are allocated and VM_FREEPOOL_DIRECT is
87 * the pool from which physical pages for small UMA objects are
90 #define VM_NFREEPOOL 3
91 #define VM_FREEPOOL_CACHE 2
92 #define VM_FREEPOOL_DEFAULT 0
93 #define VM_FREEPOOL_DIRECT 1
96 * we support 2 free lists:
98 * - DEFAULT for all systems
99 * - ISADMA for the ISA DMA range on Sharks only
102 #define VM_NFREELIST 2
103 #define VM_FREELIST_DEFAULT 0
104 #define VM_FREELIST_ISADMA 1
107 * The largest allocation size is 1MB.
109 #define VM_NFREEORDER 9
112 * Enable superpage reservations: 1 level.
114 #ifndef VM_NRESERVLEVEL
115 #define VM_NRESERVLEVEL 1
119 * Level 0 reservations consist of 256 pages.
121 #ifndef VM_LEVEL_0_ORDER
122 #define VM_LEVEL_0_ORDER 8
125 #define UPT_MAX_ADDRESS VADDR(UPTPTDI + 3, 0)
126 #define UPT_MIN_ADDRESS VADDR(UPTPTDI, 0)
128 #define VM_MIN_ADDRESS (0x00001000)
129 #ifdef ARM_USE_SMALL_ALLOC
131 * ARM_KERN_DIRECTMAP is used to make sure there's enough space between
132 * VM_MAXUSER_ADDRESS and KERNBASE to map the whole memory.
133 * It has to be a compile-time constant, even if arm_init_smallalloc(),
134 * which will do the mapping, gets the real amount of memory at runtime,
135 * because VM_MAXUSER_ADDRESS is a constant.
137 #ifndef ARM_KERN_DIRECTMAP
138 #define ARM_KERN_DIRECTMAP 512 * 1024 * 1024 /* 512 MB */
140 #define VM_MAXUSER_ADDRESS KERNBASE - ARM_KERN_DIRECTMAP
141 #else /* ARM_USE_SMALL_ALLOC */
142 #ifndef VM_MAXUSER_ADDRESS
143 #define VM_MAXUSER_ADDRESS KERNBASE
144 #endif /* VM_MAXUSER_ADDRESS */
145 #endif /* ARM_USE_SMALL_ALLOC */
146 #define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
148 #define USRSTACK VM_MAXUSER_ADDRESS
150 /* initial pagein size of beginning of executable file */
151 #ifndef VM_INITIAL_PAGEIN
152 #define VM_INITIAL_PAGEIN 16
155 #ifndef VM_MIN_KERNEL_ADDRESS
156 #define VM_MIN_KERNEL_ADDRESS KERNBASE
159 #define VM_MAX_KERNEL_ADDRESS (vm_max_kernel_address)
162 * Virtual size (bytes) for various kernel submaps.
165 #define VM_KMEM_SIZE (12*1024*1024)
167 #ifndef VM_KMEM_SIZE_SCALE
168 #define VM_KMEM_SIZE_SCALE (3)
172 * Ceiling on the size of the kmem submap: 40% of the kernel map.
174 #ifndef VM_KMEM_SIZE_MAX
175 #define VM_KMEM_SIZE_MAX ((vm_max_kernel_address - \
176 VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5)
179 #ifdef ARM_USE_SMALL_ALLOC
180 #define UMA_MD_SMALL_ALLOC
181 #endif /* ARM_USE_SMALL_ALLOC */
183 extern vm_offset_t vm_max_kernel_address;
185 #define ZERO_REGION_SIZE (64 * 1024) /* 64KB */
187 #ifndef VM_MAX_AUTOTUNE_MAXUSERS
188 #define VM_MAX_AUTOTUNE_MAXUSERS 384
191 #endif /* _MACHINE_VMPARAM_H_ */