1 /* 2 * Copyright 2002-2005, Axel Dörfler, axeld@pinc-software.de. 3 * Distributed under the terms of the MIT License. 4 * 5 * Copyright 2001-2002, Travis Geiselbrecht. All rights reserved. 6 * Distributed under the terms of the NewOS License. 7 */ 8 #ifndef _KERNEL_KERNEL_H 9 #define _KERNEL_KERNEL_H 10 11 12 #include <arch_kernel.h> 13 #include <arch_config.h> 14 15 16 /* Passed in buffers from user-space shouldn't point into the kernel */ 17 #define IS_USER_ADDRESS(x) \ 18 ((addr_t)(x) < KERNEL_BASE || (addr_t)(x) > KERNEL_TOP) 19 20 #define IS_KERNEL_ADDRESS(x) \ 21 ((addr_t)(x) >= KERNEL_BASE && (addr_t)(x) <= KERNEL_TOP) 22 23 #define DEBUG_KERNEL_STACKS 24 // Note, debugging kernel stacks doesn't really work yet. Since the 25 // interrupt will also try to use the stack on a page fault, all 26 // you get is a double fault. 27 // At least, you then know that the stack overflows in this case :) 28 29 /** Size of the kernel stack */ 30 #define KERNEL_STACK_SIZE (B_PAGE_SIZE * 3) // 12 kB 31 32 #ifdef DEBUG_KERNEL_STACKS 33 # define KERNEL_STACK_GUARD_PAGES 1 34 #else 35 # define KERNEL_STACK_GUARD_PAGES 0 36 #endif 37 38 /** Size of the environmental variables space for a process */ 39 #define ENV_SIZE (B_PAGE_SIZE * 8) 40 41 42 #define ROUNDDOWN(a, b) (((a) / (b)) * (b)) 43 #define ROUNDUP(a, b) ROUNDDOWN((a) + (b) - 1, b) 44 45 46 #define CHECK_BIT(a, b) ((a) & (1 << (b))) 47 #define SET_BIT(a, b) ((a) | (1 << (b))) 48 #define CLEAR_BIT(a, b) ((a) & (~(1 << (b)))) 49 50 /* during kernel startup, interrupts are disabled (among other things) */ 51 extern bool gKernelStartup; 52 extern bool gKernelShutdown; 53 54 55 #ifdef __cplusplus 56 extern "C" { 57 #endif 58 59 status_t system_shutdown(bool reboot); 60 status_t _user_shutdown(bool reboot); 61 62 #ifdef __cplusplus 63 } 64 #endif 65 66 #endif /* _KERNEL_KERNEL_H */ 67