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 _FSSH_KERNEL_H 9 #define _FSSH_KERNEL_H 10 11 12 #include "fssh_os.h" 13 14 15 /* Passed in buffers from user-space shouldn't point into the kernel */ 16 #if 0 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 #endif // 0 23 24 #define DEBUG_KERNEL_STACKS 25 // Note, debugging kernel stacks doesn't really work yet. Since the 26 // interrupt will also try to use the stack on a page fault, all 27 // you get is a double fault. 28 // At least, you then know that the stack overflows in this case :) 29 30 /** Size of the kernel stack */ 31 #ifndef DEBUG_KERNEL_STACKS 32 # define KERNEL_STACK_SIZE (B_PAGE_SIZE * 2) // 8 kB 33 #else 34 # define KERNEL_STACK_SIZE (B_PAGE_SIZE * 3) // 8 kB + one guard page 35 #endif 36 #define KERNEL_STACK_GUARD_PAGES 1 37 38 /** Size of the stack given to teams in user space */ 39 #define USER_MAIN_THREAD_STACK_SIZE (16 * 1024 * 1024) // 16 MB 40 #define USER_STACK_SIZE (256 * 1024) // 256 kB 41 #define USER_STACK_GUARD_PAGES 4 // 16 kB 42 43 /** Size of the environmental variables space for a process */ 44 #define ENV_SIZE (B_PAGE_SIZE * 8) 45 46 47 #define ROUNDUP(a, b) (((a) + ((b)-1)) & ~((b)-1)) 48 #define ROUNDDOWN(a, b) (((a) / (b)) * (b)) 49 50 51 #define CHECK_BIT(a, b) ((a) & (1 << (b))) 52 #define SET_BIT(a, b) ((a) | (1 << (b))) 53 #define CLEAR_BIT(a, b) ((a) & (~(1 << (b)))) 54 55 56 #endif /* _FSSH_KERNEL_H */ 57