ab7ada645a
Added a IS_KERNEL_ADDRESS() macro. git-svn-id: file:///srv/svn/repos/haiku/trunk/current@6673 a95241bf-73f2-0310-859d-f6bbb57e9c96
41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
/*
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** Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
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** Distributed under the terms of the NewOS License.
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*/
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#ifndef _KERNEL_KERNEL_H
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#define _KERNEL_KERNEL_H
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#include <arch_kernel.h>
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/* Passed in buffers from user-space shouldn't point into the kernel */
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#define IS_USER_ADDRESS(x) \
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((addr_t)(x) < KERNEL_BASE || (addr_t)(x) > KERNEL_TOP)
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#define IS_KERNEL_ADDRESS(x) \
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((addr_t)(x) >= KERNEL_BASE && (addr_t)(x) <= KERNEL_TOP)
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/** Size of the kernel stack */
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#define KSTACK_SIZE (PAGE_SIZE * 2)
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/** Size of the stack given to teams in user space */
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#define MAIN_THREAD_STACK_SIZE (16 * PAGE_SIZE) // 64 kB
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// BeOS: (16 * 1024 * 1024) // 16 MB
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#define STACK_SIZE (16 * PAGE_SIZE)
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// BeOS: (256 * 1024) // 256 kB
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/** Size of the environmental variables space for a process */
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#define ENV_SIZE (PAGE_SIZE * 8)
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#define ROUNDUP(a, b) (((a) + ((b)-1)) & ~((b)-1))
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#define ROUNDOWN(a, b) (((a) / (b)) * (b))
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#define CHECK_BIT(a, b) ((a) & (1 << (b)))
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#define SET_BIT(a, b) ((a) | (1 << (b)))
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#define CLEAR_BIT(a, b) ((a) & (~(1 << (b))))
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#endif /* _KERNEL_KERNEL_H */
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