1#ifndef _LINUX_KERNEL_H 2#define _LINUX_KERNEL_H 3 4/* 5 * 'kernel.h' contains some often-used function prototypes etc 6 */ 7 8#ifdef __KERNEL__ 9 10#include <stdarg.h> 11#include <linux/linkage.h> 12#include <linux/stddef.h> 13#include <linux/types.h> 14#include <linux/compiler.h> 15#include <asm/byteorder.h> 16 17/* Optimization barrier */ 18/* The "volatile" is due to gcc bugs */ 19#define barrier() __asm__ __volatile__("": : :"memory") 20 21#define INT_MAX ((int)(~0U>>1)) 22#define INT_MIN (-INT_MAX - 1) 23#define UINT_MAX (~0U) 24#define LONG_MAX ((long)(~0UL>>1)) 25#define LONG_MIN (-LONG_MAX - 1) 26#define ULONG_MAX (~0UL) 27 28#define STACK_MAGIC 0xdeadbeef 29 30#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) 31 32#define KERN_EMERG "<0>" /* system is unusable */ 33#define KERN_ALERT "<1>" /* action must be taken immediately */ 34#define KERN_CRIT "<2>" /* critical conditions */ 35#define KERN_ERR "<3>" /* error conditions */ 36#define KERN_WARNING "<4>" /* warning conditions */ 37#define KERN_NOTICE "<5>" /* normal but significant condition */ 38#define KERN_INFO "<6>" /* informational */ 39#define KERN_DEBUG "<7>" /* debug-level messages */ 40 41extern int console_printk[]; 42 43#define console_loglevel (console_printk[0]) 44#define default_message_loglevel (console_printk[1]) 45#define minimum_console_loglevel (console_printk[2]) 46#define default_console_loglevel (console_printk[3]) 47 48# define NORET_TYPE /**/ 49# define ATTRIB_NORET __attribute__((noreturn)) 50# define NORET_AND noreturn, 51 52#ifdef __i386__ 53#define FASTCALL(x) x __attribute__((regparm(3))) 54#else 55#define FASTCALL(x) x 56#endif 57 58struct completion; 59 60extern struct notifier_block *panic_notifier_list; 61NORET_TYPE void panic(const char * fmt, ...) 62 __attribute__ ((NORET_AND format (printf, 1, 2))); 63asmlinkage NORET_TYPE void do_exit(long error_code) 64 ATTRIB_NORET; 65NORET_TYPE void complete_and_exit(struct completion *, long) 66 ATTRIB_NORET; 67extern int abs(int); 68extern unsigned long simple_strtoul(const char *,char **,unsigned int); 69extern long simple_strtol(const char *,char **,unsigned int); 70extern unsigned long long simple_strtoull(const char *,char **,unsigned int); 71extern long long simple_strtoll(const char *,char **,unsigned int); 72extern int sprintf(char * buf, const char * fmt, ...) 73 __attribute__ ((format (printf, 2, 3))); 74extern int vsprintf(char *buf, const char *, va_list); 75extern int snprintf(char * buf, size_t size, const char * fmt, ...) 76 __attribute__ ((format (printf, 3, 4))); 77extern int vsnprintf(char *buf, size_t size, const char *fmt, va_list args); 78 79extern int sscanf(const char *, const char *, ...) 80 __attribute__ ((format (scanf,2,3))); 81extern int vsscanf(const char *, const char *, va_list); 82 83extern int get_option(char **str, int *pint); 84extern char *get_options(char *str, int nints, int *ints); 85extern unsigned long long memparse(char *ptr, char **retptr); 86extern void dev_probe_lock(void); 87extern void dev_probe_unlock(void); 88 89extern int session_of_pgrp(int pgrp); 90 91asmlinkage int printk(const char * fmt, ...) 92 __attribute__ ((format (printf, 1, 2))); 93 94static inline void console_silent(void) 95{ 96 console_loglevel = 0; 97} 98 99static inline void console_verbose(void) 100{ 101 if (console_loglevel) 102 console_loglevel = 15; 103} 104 105extern void bust_spinlocks(int yes); 106extern int oops_in_progress; /* If set, an oops, panic(), BUG() or die() is in progress */ 107 108extern int tainted; 109extern const char *print_tainted(void); 110 111extern void dump_stack(void); 112 113#if DEBUG 114#define pr_debug(fmt,arg...) \ 115 printk(KERN_DEBUG fmt,##arg) 116#else 117#define pr_debug(fmt,arg...) \ 118 do { } while (0) 119#endif 120 121#define pr_info(fmt,arg...) \ 122 printk(KERN_INFO fmt,##arg) 123 124/* 125 * Display an IP address in readable format. 126 */ 127 128#define NIPQUAD(addr) \ 129 ((unsigned char *)&addr)[0], \ 130 ((unsigned char *)&addr)[1], \ 131 ((unsigned char *)&addr)[2], \ 132 ((unsigned char *)&addr)[3] 133 134#if defined(__LITTLE_ENDIAN) 135#define HIPQUAD(addr) \ 136 ((unsigned char *)&addr)[3], \ 137 ((unsigned char *)&addr)[2], \ 138 ((unsigned char *)&addr)[1], \ 139 ((unsigned char *)&addr)[0] 140#elif defined(__BIG_ENDIAN) 141#define HIPQUAD NIPQUAD 142#else 143#error "Please fix asm/byteorder.h" 144#endif /* __LITTLE_ENDIAN */ 145 146/* 147 * min()/max() macros that also do 148 * strict type-checking.. See the 149 * "unnecessary" pointer comparison. 150 */ 151#define min(x,y) ({ \ 152 const typeof(x) _x = (x); \ 153 const typeof(y) _y = (y); \ 154 (void) (&_x == &_y); \ 155 _x < _y ? _x : _y; }) 156 157#define max(x,y) ({ \ 158 const typeof(x) _x = (x); \ 159 const typeof(y) _y = (y); \ 160 (void) (&_x == &_y); \ 161 _x > _y ? _x : _y; }) 162 163/* 164 * ..and if you can't take the strict 165 * types, you can specify one yourself. 166 * 167 * Or not use min/max at all, of course. 168 */ 169#define min_t(type,x,y) \ 170 ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; }) 171#define max_t(type,x,y) \ 172 ({ type __x = (x); type __y = (y); __x > __y ? __x: __y; }) 173 174extern void __out_of_line_bug(int line) ATTRIB_NORET; 175#define out_of_line_bug() __out_of_line_bug(__LINE__) 176 177#endif /* __KERNEL__ */ 178 179#define SI_LOAD_SHIFT 16 180struct sysinfo { 181 long uptime; /* Seconds since boot */ 182 unsigned long loads[3]; /* 1, 5, and 15 minute load averages */ 183 unsigned long totalram; /* Total usable main memory size */ 184 unsigned long freeram; /* Available memory size */ 185 unsigned long sharedram; /* Amount of shared memory */ 186 unsigned long bufferram; /* Memory used by buffers */ 187 unsigned long totalswap; /* Total swap space size */ 188 unsigned long freeswap; /* swap space still available */ 189 unsigned short procs; /* Number of current processes */ 190 unsigned short pad; /* explicit padding for m68k */ 191 unsigned long totalhigh; /* Total high memory size */ 192 unsigned long freehigh; /* Available high memory size */ 193 unsigned int mem_unit; /* Memory unit size in bytes */ 194 char _f[20-2*sizeof(long)-sizeof(int)]; /* Padding: libc5 uses this.. */ 195}; 196 197#define BUG_ON(condition) do { if (unlikely((condition)!=0)) BUG(); } while(0) 198 199#endif /* _LINUX_KERNEL_H */ 200