1/*
2 * Copyright 2010 Tilera Corporation. All Rights Reserved.
3 *
4 *   This program is free software; you can redistribute it and/or
5 *   modify it under the terms of the GNU General Public License
6 *   as published by the Free Software Foundation, version 2.
7 *
8 *   This program is distributed in the hope that it will be useful, but
9 *   WITHOUT ANY WARRANTY; without even the implied warranty of
10 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
11 *   NON INFRINGEMENT.  See the GNU General Public License for
12 *   more details.
13 */
14
15#ifndef _ASM_TILE_COMPAT_H
16#define _ASM_TILE_COMPAT_H
17
18/*
19 * Architecture specific compatibility types
20 */
21#include <linux/types.h>
22#include <linux/sched.h>
23
24#define COMPAT_USER_HZ	100
25
26/* "long" and pointer-based types are different. */
27typedef s32		compat_long_t;
28typedef u32		compat_ulong_t;
29typedef u32		compat_size_t;
30typedef s32		compat_ssize_t;
31typedef s32		compat_off_t;
32typedef s32		compat_time_t;
33typedef s32		compat_clock_t;
34typedef u32		compat_ino_t;
35typedef u32		compat_caddr_t;
36typedef	u32		compat_uptr_t;
37
38/* Many types are "int" or otherwise the same. */
39typedef __kernel_pid_t compat_pid_t;
40typedef __kernel_uid_t __compat_uid_t;
41typedef __kernel_gid_t __compat_gid_t;
42typedef __kernel_uid32_t __compat_uid32_t;
43typedef __kernel_uid32_t __compat_gid32_t;
44typedef __kernel_mode_t compat_mode_t;
45typedef __kernel_dev_t compat_dev_t;
46typedef __kernel_loff_t compat_loff_t;
47typedef __kernel_ipc_pid_t compat_ipc_pid_t;
48typedef __kernel_daddr_t compat_daddr_t;
49typedef __kernel_fsid_t	compat_fsid_t;
50typedef __kernel_timer_t compat_timer_t;
51typedef __kernel_key_t compat_key_t;
52typedef int compat_int_t;
53typedef s64 compat_s64;
54typedef uint compat_uint_t;
55typedef u64 compat_u64;
56
57/* We use the same register dump format in 32-bit images. */
58typedef unsigned long compat_elf_greg_t;
59#define COMPAT_ELF_NGREG (sizeof(struct pt_regs) / sizeof(compat_elf_greg_t))
60typedef compat_elf_greg_t compat_elf_gregset_t[COMPAT_ELF_NGREG];
61
62struct compat_timespec {
63	compat_time_t	tv_sec;
64	s32		tv_nsec;
65};
66
67struct compat_timeval {
68	compat_time_t	tv_sec;
69	s32		tv_usec;
70};
71
72#define compat_stat stat
73#define compat_statfs statfs
74
75struct compat_sysctl {
76	unsigned int	name;
77	int		nlen;
78	unsigned int	oldval;
79	unsigned int	oldlenp;
80	unsigned int	newval;
81	unsigned int	newlen;
82	unsigned int	__unused[4];
83};
84
85
86struct compat_flock {
87	short		l_type;
88	short		l_whence;
89	compat_off_t	l_start;
90	compat_off_t	l_len;
91	compat_pid_t	l_pid;
92};
93
94#define F_GETLK64	12	/*  using 'struct flock64' */
95#define F_SETLK64	13
96#define F_SETLKW64	14
97
98struct compat_flock64 {
99	short		l_type;
100	short		l_whence;
101	compat_loff_t	l_start;
102	compat_loff_t	l_len;
103	compat_pid_t	l_pid;
104};
105
106#define COMPAT_RLIM_INFINITY		0xffffffff
107
108#define _COMPAT_NSIG		64
109#define _COMPAT_NSIG_BPW	32
110
111typedef u32               compat_sigset_word;
112
113typedef union compat_sigval {
114	compat_int_t	sival_int;
115	compat_uptr_t	sival_ptr;
116} compat_sigval_t;
117
118#define COMPAT_SI_PAD_SIZE	(128/sizeof(int) - 3)
119
120typedef struct compat_siginfo {
121	int si_signo;
122	int si_errno;
123	int si_code;
124
125	union {
126		int _pad[COMPAT_SI_PAD_SIZE];
127
128		/* kill() */
129		struct {
130			unsigned int _pid;	/* sender's pid */
131			unsigned int _uid;	/* sender's uid */
132		} _kill;
133
134		/* POSIX.1b timers */
135		struct {
136			compat_timer_t _tid;	/* timer id */
137			int _overrun;		/* overrun count */
138			compat_sigval_t _sigval;	/* same as below */
139			int _sys_private;	/* not to be passed to user */
140			int _overrun_incr;	/* amount to add to overrun */
141		} _timer;
142
143		/* POSIX.1b signals */
144		struct {
145			unsigned int _pid;	/* sender's pid */
146			unsigned int _uid;	/* sender's uid */
147			compat_sigval_t _sigval;
148		} _rt;
149
150		/* SIGCHLD */
151		struct {
152			unsigned int _pid;	/* which child */
153			unsigned int _uid;	/* sender's uid */
154			int _status;		/* exit code */
155			compat_clock_t _utime;
156			compat_clock_t _stime;
157		} _sigchld;
158
159		/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
160		struct {
161			unsigned int _addr;	/* faulting insn/memory ref. */
162#ifdef __ARCH_SI_TRAPNO
163			int _trapno;	/* TRAP # which caused the signal */
164#endif
165		} _sigfault;
166
167		/* SIGPOLL */
168		struct {
169			int _band;	/* POLL_IN, POLL_OUT, POLL_MSG */
170			int _fd;
171		} _sigpoll;
172	} _sifields;
173} compat_siginfo_t;
174
175#define COMPAT_OFF_T_MAX	0x7fffffff
176#define COMPAT_LOFF_T_MAX	0x7fffffffffffffffL
177
178struct compat_ipc64_perm {
179	compat_key_t key;
180	__compat_uid32_t uid;
181	__compat_gid32_t gid;
182	__compat_uid32_t cuid;
183	__compat_gid32_t cgid;
184	unsigned short mode;
185	unsigned short __pad1;
186	unsigned short seq;
187	unsigned short __pad2;
188	compat_ulong_t unused1;
189	compat_ulong_t unused2;
190};
191
192struct compat_semid64_ds {
193	struct compat_ipc64_perm sem_perm;
194	compat_time_t  sem_otime;
195	compat_ulong_t __unused1;
196	compat_time_t  sem_ctime;
197	compat_ulong_t __unused2;
198	compat_ulong_t sem_nsems;
199	compat_ulong_t __unused3;
200	compat_ulong_t __unused4;
201};
202
203struct compat_msqid64_ds {
204	struct compat_ipc64_perm msg_perm;
205	compat_time_t  msg_stime;
206	compat_ulong_t __unused1;
207	compat_time_t  msg_rtime;
208	compat_ulong_t __unused2;
209	compat_time_t  msg_ctime;
210	compat_ulong_t __unused3;
211	compat_ulong_t msg_cbytes;
212	compat_ulong_t msg_qnum;
213	compat_ulong_t msg_qbytes;
214	compat_pid_t   msg_lspid;
215	compat_pid_t   msg_lrpid;
216	compat_ulong_t __unused4;
217	compat_ulong_t __unused5;
218};
219
220struct compat_shmid64_ds {
221	struct compat_ipc64_perm shm_perm;
222	compat_size_t  shm_segsz;
223	compat_time_t  shm_atime;
224	compat_ulong_t __unused1;
225	compat_time_t  shm_dtime;
226	compat_ulong_t __unused2;
227	compat_time_t  shm_ctime;
228	compat_ulong_t __unused3;
229	compat_pid_t   shm_cpid;
230	compat_pid_t   shm_lpid;
231	compat_ulong_t shm_nattch;
232	compat_ulong_t __unused4;
233	compat_ulong_t __unused5;
234};
235
236/*
237 * A pointer passed in from user mode. This should not
238 * be used for syscall parameters, just declare them
239 * as pointers because the syscall entry code will have
240 * appropriately converted them already.
241 */
242
243static inline void __user *compat_ptr(compat_uptr_t uptr)
244{
245	return (void __user *)(long)(s32)uptr;
246}
247
248static inline compat_uptr_t ptr_to_compat(void __user *uptr)
249{
250	return (u32)(unsigned long)uptr;
251}
252
253/* Sign-extend when storing a kernel pointer to a user's ptregs. */
254static inline unsigned long ptr_to_compat_reg(void __user *uptr)
255{
256	return (long)(int)(long __force)uptr;
257}
258
259static inline void __user *arch_compat_alloc_user_space(long len)
260{
261	struct pt_regs *regs = task_pt_regs(current);
262	return (void __user *)regs->sp - len;
263}
264
265static inline int is_compat_task(void)
266{
267	return current_thread_info()->status & TS_COMPAT;
268}
269
270extern int compat_setup_rt_frame(struct ksignal *ksig, sigset_t *set,
271				 struct pt_regs *regs);
272
273/* Compat syscalls. */
274struct compat_siginfo;
275struct compat_sigaltstack;
276long compat_sys_rt_sigreturn(void);
277long compat_sys_truncate64(char __user *filename, u32 dummy, u32 low, u32 high);
278long compat_sys_ftruncate64(unsigned int fd, u32 dummy, u32 low, u32 high);
279long compat_sys_pread64(unsigned int fd, char __user *ubuf, size_t count,
280			u32 dummy, u32 low, u32 high);
281long compat_sys_pwrite64(unsigned int fd, char __user *ubuf, size_t count,
282			 u32 dummy, u32 low, u32 high);
283long compat_sys_sync_file_range2(int fd, unsigned int flags,
284				 u32 offset_lo, u32 offset_hi,
285				 u32 nbytes_lo, u32 nbytes_hi);
286long compat_sys_fallocate(int fd, int mode,
287			  u32 offset_lo, u32 offset_hi,
288			  u32 len_lo, u32 len_hi);
289long compat_sys_llseek(unsigned int fd, unsigned int offset_high,
290		       unsigned int offset_low, loff_t __user * result,
291		       unsigned int origin);
292
293/* Assembly trampoline to avoid clobbering r0. */
294long _compat_sys_rt_sigreturn(void);
295
296#endif /* _ASM_TILE_COMPAT_H */
297