1#ifndef _ASM_S390X_COMPAT_H
2#define _ASM_S390X_COMPAT_H
3/*
4 * Architecture specific compatibility types
5 */
6#include <linux/types.h>
7#include <linux/sched.h>
8#include <linux/thread_info.h>
9
10#define __TYPE_IS_PTR(t) (!__builtin_types_compatible_p(typeof(0?(t)0:0ULL), u64))
11
12#define __SC_DELOUSE(t,v) ({ \
13	BUILD_BUG_ON(sizeof(t) > 4 && !__TYPE_IS_PTR(t)); \
14	(t)(__TYPE_IS_PTR(t) ? ((v) & 0x7fffffff) : (v)); \
15})
16
17#define PSW32_MASK_PER		0x40000000UL
18#define PSW32_MASK_DAT		0x04000000UL
19#define PSW32_MASK_IO		0x02000000UL
20#define PSW32_MASK_EXT		0x01000000UL
21#define PSW32_MASK_KEY		0x00F00000UL
22#define PSW32_MASK_BASE		0x00080000UL	/* Always one */
23#define PSW32_MASK_MCHECK	0x00040000UL
24#define PSW32_MASK_WAIT		0x00020000UL
25#define PSW32_MASK_PSTATE	0x00010000UL
26#define PSW32_MASK_ASC		0x0000C000UL
27#define PSW32_MASK_CC		0x00003000UL
28#define PSW32_MASK_PM		0x00000f00UL
29#define PSW32_MASK_RI		0x00000080UL
30
31#define PSW32_MASK_USER		0x0000FF00UL
32
33#define PSW32_ADDR_AMODE	0x80000000UL
34#define PSW32_ADDR_INSN		0x7FFFFFFFUL
35
36#define PSW32_DEFAULT_KEY	(((u32) PAGE_DEFAULT_ACC) << 20)
37
38#define PSW32_ASC_PRIMARY	0x00000000UL
39#define PSW32_ASC_ACCREG	0x00004000UL
40#define PSW32_ASC_SECONDARY	0x00008000UL
41#define PSW32_ASC_HOME		0x0000C000UL
42
43#define PSW32_USER_BITS (PSW32_MASK_DAT | PSW32_MASK_IO | PSW32_MASK_EXT | \
44			 PSW32_DEFAULT_KEY | PSW32_MASK_BASE | \
45			 PSW32_MASK_MCHECK | PSW32_MASK_PSTATE | \
46			 PSW32_ASC_PRIMARY)
47
48#define COMPAT_USER_HZ		100
49#define COMPAT_UTS_MACHINE	"s390\0\0\0\0"
50
51typedef u32		compat_size_t;
52typedef s32		compat_ssize_t;
53typedef s32		compat_time_t;
54typedef s32		compat_clock_t;
55typedef s32		compat_pid_t;
56typedef u16		__compat_uid_t;
57typedef u16		__compat_gid_t;
58typedef u32		__compat_uid32_t;
59typedef u32		__compat_gid32_t;
60typedef u16		compat_mode_t;
61typedef u32		compat_ino_t;
62typedef u16		compat_dev_t;
63typedef s32		compat_off_t;
64typedef s64		compat_loff_t;
65typedef u16		compat_nlink_t;
66typedef u16		compat_ipc_pid_t;
67typedef s32		compat_daddr_t;
68typedef u32		compat_caddr_t;
69typedef __kernel_fsid_t	compat_fsid_t;
70typedef s32		compat_key_t;
71typedef s32		compat_timer_t;
72
73typedef s32		compat_int_t;
74typedef s32		compat_long_t;
75typedef s64		compat_s64;
76typedef u32		compat_uint_t;
77typedef u32		compat_ulong_t;
78typedef u64		compat_u64;
79typedef u32		compat_uptr_t;
80
81typedef struct {
82	u32 mask;
83	u32 addr;
84} __aligned(8) psw_compat_t;
85
86typedef struct {
87	psw_compat_t psw;
88	u32 gprs[NUM_GPRS];
89	u32 acrs[NUM_ACRS];
90	u32 orig_gpr2;
91} s390_compat_regs;
92
93typedef struct {
94	u32 gprs_high[NUM_GPRS];
95} s390_compat_regs_high;
96
97struct compat_timespec {
98	compat_time_t	tv_sec;
99	s32		tv_nsec;
100};
101
102struct compat_timeval {
103	compat_time_t	tv_sec;
104	s32		tv_usec;
105};
106
107struct compat_stat {
108	compat_dev_t	st_dev;
109	u16		__pad1;
110	compat_ino_t	st_ino;
111	compat_mode_t	st_mode;
112	compat_nlink_t	st_nlink;
113	__compat_uid_t	st_uid;
114	__compat_gid_t	st_gid;
115	compat_dev_t	st_rdev;
116	u16		__pad2;
117	u32		st_size;
118	u32		st_blksize;
119	u32		st_blocks;
120	u32		st_atime;
121	u32		st_atime_nsec;
122	u32		st_mtime;
123	u32		st_mtime_nsec;
124	u32		st_ctime;
125	u32		st_ctime_nsec;
126	u32		__unused4;
127	u32		__unused5;
128};
129
130struct compat_flock {
131	short		l_type;
132	short		l_whence;
133	compat_off_t	l_start;
134	compat_off_t	l_len;
135	compat_pid_t	l_pid;
136};
137
138#define F_GETLK64       12
139#define F_SETLK64       13
140#define F_SETLKW64      14
141
142struct compat_flock64 {
143	short		l_type;
144	short		l_whence;
145	compat_loff_t	l_start;
146	compat_loff_t	l_len;
147	compat_pid_t	l_pid;
148};
149
150struct compat_statfs {
151	u32		f_type;
152	u32		f_bsize;
153	u32		f_blocks;
154	u32		f_bfree;
155	u32		f_bavail;
156	u32		f_files;
157	u32		f_ffree;
158	compat_fsid_t	f_fsid;
159	u32		f_namelen;
160	u32		f_frsize;
161	u32		f_flags;
162	u32		f_spare[4];
163};
164
165struct compat_statfs64 {
166	u32		f_type;
167	u32		f_bsize;
168	u64		f_blocks;
169	u64		f_bfree;
170	u64		f_bavail;
171	u64		f_files;
172	u64		f_ffree;
173	compat_fsid_t	f_fsid;
174	u32		f_namelen;
175	u32		f_frsize;
176	u32		f_flags;
177	u32		f_spare[4];
178};
179
180#define COMPAT_RLIM_OLD_INFINITY	0x7fffffff
181#define COMPAT_RLIM_INFINITY		0xffffffff
182
183typedef u32		compat_old_sigset_t;	/* at least 32 bits */
184
185#define _COMPAT_NSIG		64
186#define _COMPAT_NSIG_BPW	32
187
188typedef u32		compat_sigset_word;
189
190typedef union compat_sigval {
191	compat_int_t	sival_int;
192	compat_uptr_t	sival_ptr;
193} compat_sigval_t;
194
195typedef struct compat_siginfo {
196	int	si_signo;
197	int	si_errno;
198	int	si_code;
199
200	union {
201		int _pad[128/sizeof(int) - 3];
202
203		/* kill() */
204		struct {
205			pid_t	_pid;	/* sender's pid */
206			uid_t	_uid;	/* sender's uid */
207		} _kill;
208
209		/* POSIX.1b timers */
210		struct {
211			compat_timer_t _tid;		/* timer id */
212			int _overrun;			/* overrun count */
213			compat_sigval_t _sigval;	/* same as below */
214			int _sys_private;	/* not to be passed to user */
215		} _timer;
216
217		/* POSIX.1b signals */
218		struct {
219			pid_t			_pid;	/* sender's pid */
220			uid_t			_uid;	/* sender's uid */
221			compat_sigval_t		_sigval;
222		} _rt;
223
224		/* SIGCHLD */
225		struct {
226			pid_t			_pid;	/* which child */
227			uid_t			_uid;	/* sender's uid */
228			int			_status;/* exit code */
229			compat_clock_t		_utime;
230			compat_clock_t		_stime;
231		} _sigchld;
232
233		/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
234		struct {
235			__u32	_addr;	/* faulting insn/memory ref. - pointer */
236		} _sigfault;
237
238		/* SIGPOLL */
239		struct {
240			int	_band;	/* POLL_IN, POLL_OUT, POLL_MSG */
241			int	_fd;
242		} _sigpoll;
243	} _sifields;
244} compat_siginfo_t;
245
246/*
247 * How these fields are to be accessed.
248 */
249#define si_pid		_sifields._kill._pid
250#define si_uid		_sifields._kill._uid
251#define si_status	_sifields._sigchld._status
252#define si_utime	_sifields._sigchld._utime
253#define si_stime	_sifields._sigchld._stime
254#define si_value	_sifields._rt._sigval
255#define si_int		_sifields._rt._sigval.sival_int
256#define si_ptr		_sifields._rt._sigval.sival_ptr
257#define si_addr		_sifields._sigfault._addr
258#define si_band		_sifields._sigpoll._band
259#define si_fd		_sifields._sigpoll._fd
260#define si_tid		_sifields._timer._tid
261#define si_overrun	_sifields._timer._overrun
262
263#define COMPAT_OFF_T_MAX	0x7fffffff
264#define COMPAT_LOFF_T_MAX	0x7fffffffffffffffL
265
266/*
267 * A pointer passed in from user mode. This should not
268 * be used for syscall parameters, just declare them
269 * as pointers because the syscall entry code will have
270 * appropriately converted them already.
271 */
272
273static inline void __user *compat_ptr(compat_uptr_t uptr)
274{
275	return (void __user *)(unsigned long)(uptr & 0x7fffffffUL);
276}
277
278static inline compat_uptr_t ptr_to_compat(void __user *uptr)
279{
280	return (u32)(unsigned long)uptr;
281}
282
283#ifdef CONFIG_COMPAT
284
285static inline int is_compat_task(void)
286{
287	return is_32bit_task();
288}
289
290static inline void __user *arch_compat_alloc_user_space(long len)
291{
292	unsigned long stack;
293
294	stack = KSTK_ESP(current);
295	if (is_compat_task())
296		stack &= 0x7fffffffUL;
297	return (void __user *) (stack - len);
298}
299
300#endif
301
302struct compat_ipc64_perm {
303	compat_key_t key;
304	__compat_uid32_t uid;
305	__compat_gid32_t gid;
306	__compat_uid32_t cuid;
307	__compat_gid32_t cgid;
308	compat_mode_t mode;
309	unsigned short __pad1;
310	unsigned short seq;
311	unsigned short __pad2;
312	unsigned int __unused1;
313	unsigned int __unused2;
314};
315
316struct compat_semid64_ds {
317	struct compat_ipc64_perm sem_perm;
318	compat_time_t  sem_otime;
319	compat_ulong_t __pad1;
320	compat_time_t  sem_ctime;
321	compat_ulong_t __pad2;
322	compat_ulong_t sem_nsems;
323	compat_ulong_t __unused1;
324	compat_ulong_t __unused2;
325};
326
327struct compat_msqid64_ds {
328	struct compat_ipc64_perm msg_perm;
329	compat_time_t   msg_stime;
330	compat_ulong_t __pad1;
331	compat_time_t   msg_rtime;
332	compat_ulong_t __pad2;
333	compat_time_t   msg_ctime;
334	compat_ulong_t __pad3;
335	compat_ulong_t msg_cbytes;
336	compat_ulong_t msg_qnum;
337	compat_ulong_t msg_qbytes;
338	compat_pid_t   msg_lspid;
339	compat_pid_t   msg_lrpid;
340	compat_ulong_t __unused1;
341	compat_ulong_t __unused2;
342};
343
344struct compat_shmid64_ds {
345	struct compat_ipc64_perm shm_perm;
346	compat_size_t  shm_segsz;
347	compat_time_t  shm_atime;
348	compat_ulong_t __pad1;
349	compat_time_t  shm_dtime;
350	compat_ulong_t __pad2;
351	compat_time_t  shm_ctime;
352	compat_ulong_t __pad3;
353	compat_pid_t   shm_cpid;
354	compat_pid_t   shm_lpid;
355	compat_ulong_t shm_nattch;
356	compat_ulong_t __unused1;
357	compat_ulong_t __unused2;
358};
359#endif /* _ASM_S390X_COMPAT_H */
360