0536ff83e9
that's the limit of the addr_t domain anyway. * Defined IS_USER_ADDRESS() to !IS_KERNEL_ADDRESS(), which semantically it was already, just more verbosely. Should, in the future, avoid hundreds of useless Coverity tickets where the macros are used. git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40093 a95241bf-73f2-0310-859d-f6bbb57e9c96
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
/*
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* Copyright 2002-2005, Axel Dörfler, axeld@pinc-software.de.
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* Distributed under the terms of the MIT License.
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*
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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 <config/types.h>
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#include <arch_kernel.h>
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#include <arch_config.h>
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// macro to check whether an address is in the kernel address space (avoid
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// always-true checks)
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#if KERNEL_BASE == 0
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# define IS_KERNEL_ADDRESS(x) ((addr_t)(x) <= KERNEL_TOP)
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#elif KERNEL_TOP == __HAIKU_ADDR_MAX
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# define IS_KERNEL_ADDRESS(x) ((addr_t)(x) >= KERNEL_BASE)
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#else
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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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#endif
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// Buffers passed in from user-space shouldn't point into the kernel.
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#define IS_USER_ADDRESS(x) (!IS_KERNEL_ADDRESS(x))
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#define DEBUG_KERNEL_STACKS
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// Note, debugging kernel stacks doesn't really work yet. Since the
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// interrupt will also try to use the stack on a page fault, all
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// you get is a double fault.
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// At least, you then know that the stack overflows in this case :)
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/** Size of the kernel stack */
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#define KERNEL_STACK_SIZE (B_PAGE_SIZE * 3) // 12 kB
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#ifdef DEBUG_KERNEL_STACKS
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# define KERNEL_STACK_GUARD_PAGES 1
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#else
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# define KERNEL_STACK_GUARD_PAGES 0
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#endif
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/** Size of the environmental variables space for a process */
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#define ENV_SIZE (B_PAGE_SIZE * 8)
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#define ROUNDDOWN(a, b) (((a) / (b)) * (b))
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#define ROUNDUP(a, b) ROUNDDOWN((a) + (b) - 1, 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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/* during kernel startup, interrupts are disabled (among other things) */
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extern bool gKernelStartup;
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extern bool gKernelShutdown;
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#ifdef __cplusplus
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extern "C" {
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#endif
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status_t system_shutdown(bool reboot);
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status_t _user_shutdown(bool reboot);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _KERNEL_KERNEL_H */
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