/home/lenb/src/to-linus branch 'acpi-2.6.12'

[mirror_ubuntu-artful-kernel.git] / include / asm-xtensa / unistd.h

/*
 * include/asm-xtensa/unistd.h
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2001 - 2005 Tensilica Inc.
 */

#ifndef _XTENSA_UNISTD_H
#define _XTENSA_UNISTD_H

#include <linux/linkage.h>

#define __NR_spill                0
#define __NR_exit                 1
#define __NR_read                 3
#define __NR_write                4
#define __NR_open                 5
#define __NR_close                6
#define __NR_creat                8
#define __NR_link                 9
#define __NR_unlink              10
#define __NR_execve              11
#define __NR_chdir               12
#define __NR_mknod               14
#define __NR_chmod               15
#define __NR_lchown              16
#define __NR_break               17
#define __NR_lseek               19
#define __NR_getpid              20
#define __NR_mount               21
#define __NR_setuid              23
#define __NR_getuid              24
#define __NR_ptrace              26
#define __NR_utime               30
#define __NR_stty                31
#define __NR_gtty                32
#define __NR_access              33
#define __NR_ftime               35
#define __NR_sync                36
#define __NR_kill                37
#define __NR_rename              38
#define __NR_mkdir               39
#define __NR_rmdir               40
#define __NR_dup                 41
#define __NR_pipe                42
#define __NR_times               43
#define __NR_prof                44
#define __NR_brk                 45
#define __NR_setgid              46
#define __NR_getgid              47
#define __NR_signal              48
#define __NR_geteuid             49
#define __NR_getegid             50
#define __NR_acct                51
#define __NR_lock                53
#define __NR_ioctl               54
#define __NR_fcntl               55
#define __NR_setpgid             57
#define __NR_ulimit              58
#define __NR_umask               60
#define __NR_chroot              61
#define __NR_ustat               62
#define __NR_dup2                63
#define __NR_getppid             64
#define __NR_setsid              66
#define __NR_sigaction           67
#define __NR_setreuid            70
#define __NR_setregid            71
#define __NR_sigsuspend          72
#define __NR_sigpending          73
#define __NR_sethostname         74
#define __NR_setrlimit           75
#define __NR_getrlimit           76     /* Back compatible 2Gig limited rlimit */
#define __NR_getrusage           77
#define __NR_gettimeofday        78
#define __NR_settimeofday        79
#define __NR_getgroups           80
#define __NR_setgroups           81
#define __NR_select              82
#define __NR_symlink             83
#define __NR_readlink            85
#define __NR_uselib              86
#define __NR_swapon              87
#define __NR_reboot              88
#define __NR_munmap              91
#define __NR_truncate            92
#define __NR_ftruncate           93
#define __NR_fchmod              94
#define __NR_fchown              95
#define __NR_getpriority         96
#define __NR_setpriority         97
#define __NR_profil              98
#define __NR_statfs              99
#define __NR_fstatfs            100
#define __NR_ioperm             101
#define __NR_syslog             103
#define __NR_setitimer          104
#define __NR_getitimer          105
#define __NR_stat               106
#define __NR_lstat              107
#define __NR_fstat              108
#define __NR_iopl               110
#define __NR_vhangup            111
#define __NR_idle               112
#define __NR_wait4              114
#define __NR_swapoff            115
#define __NR_sysinfo            116
#define __NR_fsync              118
#define __NR_sigreturn          119
#define __NR_clone              120
#define __NR_setdomainname      121
#define __NR_uname              122
#define __NR_modify_ldt         123
#define __NR_adjtimex           124
#define __NR_mprotect           125
#define __NR_create_module      127
#define __NR_init_module        128
#define __NR_delete_module      129
#define __NR_quotactl           131
#define __NR_getpgid            132
#define __NR_fchdir             133
#define __NR_bdflush            134
#define __NR_sysfs              135
#define __NR_personality        136
#define __NR_setfsuid           138
#define __NR_setfsgid           139
#define __NR__llseek            140
#define __NR_getdents           141
#define __NR__newselect         142
#define __NR_flock              143
#define __NR_msync              144
#define __NR_readv              145
#define __NR_writev             146
#define __NR_cacheflush         147
#define __NR_cachectl           148
#define __NR_sysxtensa          149
#define __NR_sysdummy           150
#define __NR_getsid             151
#define __NR_fdatasync          152
#define __NR__sysctl            153
#define __NR_mlock              154
#define __NR_munlock            155
#define __NR_mlockall           156
#define __NR_munlockall         157
#define __NR_sched_setparam             158
#define __NR_sched_getparam             159
#define __NR_sched_setscheduler         160
#define __NR_sched_getscheduler         161
#define __NR_sched_yield                162
#define __NR_sched_get_priority_max     163
#define __NR_sched_get_priority_min     164
#define __NR_sched_rr_get_interval      165
#define __NR_nanosleep          166
#define __NR_mremap             167
#define __NR_accept             168
#define __NR_bind               169
#define __NR_connect            170
#define __NR_getpeername        171
#define __NR_getsockname        172
#define __NR_getsockopt         173
#define __NR_listen             174
#define __NR_recv               175
#define __NR_recvfrom           176
#define __NR_recvmsg            177
#define __NR_send               178
#define __NR_sendmsg            179
#define __NR_sendto             180
#define __NR_setsockopt         181
#define __NR_shutdown           182
#define __NR_socket             183
#define __NR_socketpair         184
#define __NR_setresuid          185
#define __NR_getresuid          186
#define __NR_query_module       187
#define __NR_poll               188
#define __NR_nfsservctl         189
#define __NR_setresgid          190
#define __NR_getresgid          191
#define __NR_prctl              192
#define __NR_rt_sigreturn       193
#define __NR_rt_sigaction       194
#define __NR_rt_sigprocmask     195
#define __NR_rt_sigpending      196
#define __NR_rt_sigtimedwait    197
#define __NR_rt_sigqueueinfo    198
#define __NR_rt_sigsuspend      199
#define __NR_pread              200
#define __NR_pwrite             201
#define __NR_chown              202
#define __NR_getcwd             203
#define __NR_capget             204
#define __NR_capset             205
#define __NR_sigaltstack        206
#define __NR_sendfile           207
#define __NR_mmap2              210
#define __NR_truncate64         211
#define __NR_ftruncate64        212
#define __NR_stat64             213
#define __NR_lstat64            214
#define __NR_fstat64            215
#define __NR_pivot_root         216
#define __NR_mincore            217
#define __NR_madvise            218
#define __NR_getdents64         219

/* Keep this last; should always equal the last valid call number. */
#define __NR_Linux_syscalls     220

/* user-visible error numbers are in the range -1 - -125: see
 * <asm-xtensa/errno.h> */

#define SYSXTENSA_RESERVED         0    /* don't use this */
#define SYSXTENSA_ATOMIC_SET       1    /* set variable */
#define SYSXTENSA_ATOMIC_EXG_ADD   2    /* exchange memory and add */
#define SYSXTENSA_ATOMIC_ADD       3    /* add to memory */
#define SYSXTENSA_ATOMIC_CMP_SWP   4    /* compare and swap */

#define SYSXTENSA_COUNT            5    /* count of syscall0 functions*/

#ifdef __KERNEL__
#define __syscall_return(type, res) return ((type)(res))
#else
#define __syscall_return(type, res) \
do { \
        if ((unsigned long)(res) >= (unsigned long)(-125)) { \
        /* Avoid using "res" which is declared to be in register r2; \
         * errno might expand to a function call and clobber it.  */ \
                int __err = -(res); \
                errno = __err; \
                res = -1; \
        } \
        return (type) (res); \
} while (0)
#endif


/* Tensilica's xt-xcc compiler is much more agressive at code
 * optimization than gcc.  Multiple __asm__ statements are
 * insufficient for xt-xcc because subsequent optimization passes
 * (beyond the front-end that knows of __asm__ statements and other
 * such GNU Extensions to C) can modify the register selection for
 * containment of C variables.
 *
 * xt-xcc cannot modify the contents of a single __asm__ statement, so
 * we create single-asm versions of the syscall macros that are
 * suitable and optimal for both xt-xcc and gcc.
 *
 * Linux takes system-call arguments in registers.  The following
 * design is optimized for user-land apps (e.g., glibc) which
 * typically have a function wrapper around the "syscall" assembly
 * instruction.  It satisfies the Xtensa ABI while minizing argument
 * shifting.
 *
 * The Xtensa ABI and software conventions require the system-call
 * number in a2.  If an argument exists in a2, we move it to the next
 * available register.  Note that for improved efficiency, we do NOT
 * shift all parameters down one register to maintain the original
 * order.
 *
 * At best case (zero arguments), we just write the syscall number to
 * a2.  At worst case (1 to 6 arguments), we move the argument in a2
 * to the next available register, then write the syscall number to
 * a2.
 *
 * For clarity, the following truth table enumerates all possibilities.
 *
 * arguments    syscall number  arg0, arg1, arg2, arg3, arg4, arg5
 * ---------    --------------  ----------------------------------
 *      0             a2
 *      1             a2        a3
 *      2             a2        a4,   a3
 *      3             a2        a5,   a3,   a4
 *      4             a2        a6,   a3,   a4,   a5
 *      5             a2        a7,   a3,   a4,   a5,   a6
 *      6             a2        a8,   a3,   a4,   a5,   a6,   a7
 */

#define _syscall0(type,name) \
type name(void) \
{ \
long __res; \
__asm__ __volatile__ ( \
        "  movi  a2, %1 \n" \
        "  syscall      \n" \
        "  mov   %0, a2 \n" \
        : "=a" (__res) \
        : "i" (__NR_##name) \
        : "a2" \
        ); \
__syscall_return(type,__res); \
}

#define _syscall1(type,name,type0,arg0) \
type name(type0 arg0) \
{ \
long __res; \
__asm__ __volatile__ ( \
        "  mov   a3, %2 \n" \
        "  movi  a2, %1 \n" \
        "  syscall      \n" \
        "  mov   %0, a2 \n" \
        : "=a" (__res) \
        : "i" (__NR_##name), "a" (arg0) \
        : "a2", "a3" \
        ); \
__syscall_return(type,__res); \
}

#define _syscall2(type,name,type0,arg0,type1,arg1) \
type name(type0 arg0,type1 arg1) \
{ \
long __res; \
__asm__ __volatile__ ( \
        "  mov   a4, %2 \n" \
        "  mov   a3, %3 \n" \
        "  movi  a2, %1 \n" \
        "  syscall      \n" \
        "  mov   %0, a2 \n" \
        : "=a" (__res) \
        : "i" (__NR_##name), "a" (arg0), "a" (arg1) \
        : "a2", "a3", "a4" \
        ); \
__syscall_return(type,__res); \
}

#define _syscall3(type,name,type0,arg0,type1,arg1,type2,arg2) \
type name(type0 arg0,type1 arg1,type2 arg2) \
{ \
long __res; \
__asm__ __volatile__ ( \
        "  mov   a5, %2 \n" \
        "  mov   a4, %4 \n" \
        "  mov   a3, %3 \n" \
        "  movi  a2, %1 \n" \
        "  syscall      \n" \
        "  mov   %0, a2 \n" \
        : "=a" (__res) \
        : "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2) \
        : "a2", "a3", "a4", "a5" \
        ); \
__syscall_return(type,__res); \
}

#define _syscall4(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3) \
type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3) \
{ \
long __res; \
__asm__ __volatile__ ( \
        "  mov   a6, %2 \n" \
        "  mov   a5, %5 \n" \
        "  mov   a4, %4 \n" \
        "  mov   a3, %3 \n" \
        "  movi  a2, %1 \n" \
        "  syscall      \n" \
        "  mov   %0, a2 \n" \
        : "=a" (__res) \
        : "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2), "a" (arg3) \
        : "a2", "a3", "a4", "a5", "a6" \
        ); \
__syscall_return(type,__res); \
}

/* Note that we save and restore the a7 frame pointer.
 * Including a7 in the clobber list doesn't do what you'd expect.
 */
#define _syscall5(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3,type4 arg4) \
{ \
long __res; \
__asm__ __volatile__ ( \
        "  mov   a9, a7 \n" \
        "  mov   a7, %2 \n" \
        "  mov   a6, %6 \n" \
        "  mov   a5, %5 \n" \
        "  mov   a4, %4 \n" \
        "  mov   a3, %3 \n" \
        "  movi  a2, %1 \n" \
        "  syscall      \n" \
        "  mov   a7, a9 \n" \
        "  mov   %0, a2 \n" \
        : "=a" (__res) \
        : "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2), \
                             "a" (arg3), "a" (arg4) \
        : "a2", "a3", "a4", "a5", "a6", "a9" \
        ); \
__syscall_return(type,__res); \
}

/* Note that we save and restore the a7 frame pointer.
 * Including a7 in the clobber list doesn't do what you'd expect.
 */
#define _syscall6(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5) \
type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5) \
{ \
long __res; \
__asm__ __volatile__ ( \
        "  mov   a9, a7 \n" \
        "  mov   a8, %2 \n" \
        "  mov   a7, %7 \n" \
        "  mov   a6, %6 \n" \
        "  mov   a5, %5 \n" \
        "  mov   a4, %4 \n" \
        "  mov   a3, %3 \n" \
        "  movi  a2, %1 \n" \
        "  syscall      \n" \
        "  mov   a7, a9 \n" \
        "  mov   %0, a2 \n" \
        : "=a" (__res) \
        : "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2), \
                             "a" (arg3), "a" (arg4), "a" (arg5)  \
        : "a2", "a3", "a4", "a5", "a6", "a8", "a9" \
        ); \
__syscall_return(type,__res); \
}


#ifdef __KERNEL_SYSCALLS__
static __inline__ _syscall3(int,execve,const char*,file,char**,argv,char**,envp)
#endif

/*
 * "Conditional" syscalls
 *
 * What we want is __attribute__((weak,alias("sys_ni_syscall"))),
 * but it doesn't work on all toolchains, so we just do it by hand
 */
#define cond_syscall(x) asm(".weak\t" #x "\n\t.set\t" #x ",sys_ni_syscall");

#ifdef __KERNEL__
#define __ARCH_WANT_STAT64
#define __ARCH_WANT_SYS_UTIME
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_RT_SIGACTION
#endif

#endif  /* _XTENSA_UNISTD_H */