9a8fd55899
The attached patches provides part 6 of an architecture implementation for the Tensilica Xtensa CPU series. Signed-off-by: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
538 lines
15 KiB
C
538 lines
15 KiB
C
/*
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* include/asm-xtensa/unistd.h
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2001 - 2005 Tensilica Inc.
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*/
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#ifndef _XTENSA_UNISTD_H
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#define _XTENSA_UNISTD_H
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#include <linux/linkage.h>
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//#define __NR_setup 0 /* used only by init, to get system going */
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#define __NR_spill 0
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#define __NR_exit 1
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#define __NR_fork 2
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#define __NR_read 3
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#define __NR_write 4
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#define __NR_open 5
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#define __NR_close 6
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#define __NR_waitpid 7
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#define __NR_creat 8
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#define __NR_link 9
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#define __NR_unlink 10
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#define __NR_execve 11
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#define __NR_chdir 12
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#define __NR_time 13
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#define __NR_mknod 14
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#define __NR_chmod 15
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#define __NR_lchown 16
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#define __NR_break 17
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#define __NR_oldstat 18
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#define __NR_lseek 19
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#define __NR_getpid 20
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#define __NR_mount 21
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#define __NR_oldumount 22
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#define __NR_setuid 23
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#define __NR_getuid 24
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#define __NR_stime 25
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#define __NR_ptrace 26
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#define __NR_alarm 27
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#define __NR_oldfstat 28
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#define __NR_pause 29
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#define __NR_utime 30
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#define __NR_stty 31
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#define __NR_gtty 32
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#define __NR_access 33
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#define __NR_nice 34
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#define __NR_ftime 35
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#define __NR_sync 36
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#define __NR_kill 37
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#define __NR_rename 38
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#define __NR_mkdir 39
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#define __NR_rmdir 40
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#define __NR_dup 41
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#define __NR_pipe 42
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#define __NR_times 43
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#define __NR_prof 44
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#define __NR_brk 45
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#define __NR_setgid 46
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#define __NR_getgid 47
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#define __NR_signal 48
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#define __NR_geteuid 49
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#define __NR_getegid 50
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#define __NR_acct 51
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#define __NR_umount 52
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#define __NR_lock 53
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#define __NR_ioctl 54
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#define __NR_fcntl 55
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#define __NR_mpx 56
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#define __NR_setpgid 57
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#define __NR_ulimit 58
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#define __NR_oldolduname 59
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#define __NR_umask 60
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#define __NR_chroot 61
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#define __NR_ustat 62
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#define __NR_dup2 63
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#define __NR_getppid 64
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#define __NR_getpgrp 65
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#define __NR_setsid 66
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#define __NR_sigaction 67
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#define __NR_sgetmask 68
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#define __NR_ssetmask 69
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#define __NR_setreuid 70
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#define __NR_setregid 71
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#define __NR_sigsuspend 72
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#define __NR_sigpending 73
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#define __NR_sethostname 74
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#define __NR_setrlimit 75
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#define __NR_getrlimit 76 /* Back compatible 2Gig limited rlimit */
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#define __NR_getrusage 77
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#define __NR_gettimeofday 78
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#define __NR_settimeofday 79
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#define __NR_getgroups 80
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#define __NR_setgroups 81
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#define __NR_select 82
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#define __NR_symlink 83
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#define __NR_oldlstat 84
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#define __NR_readlink 85
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#define __NR_uselib 86
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#define __NR_swapon 87
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#define __NR_reboot 88
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#define __NR_readdir 89
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#define __NR_mmap 90
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#define __NR_munmap 91
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#define __NR_truncate 92
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#define __NR_ftruncate 93
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#define __NR_fchmod 94
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#define __NR_fchown 95
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#define __NR_getpriority 96
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#define __NR_setpriority 97
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#define __NR_profil 98
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#define __NR_statfs 99
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#define __NR_fstatfs 100
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#define __NR_ioperm 101
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#define __NR_socketcall 102
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#define __NR_syslog 103
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#define __NR_setitimer 104
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#define __NR_getitimer 105
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#define __NR_stat 106
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#define __NR_lstat 107
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#define __NR_fstat 108
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#define __NR_olduname 109
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#define __NR_iopl 110
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#define __NR_vhangup 111
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#define __NR_idle 112
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#define __NR_vm86 113
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#define __NR_wait4 114
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#define __NR_swapoff 115
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#define __NR_sysinfo 116
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#define __NR_ipc 117
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#define __NR_fsync 118
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#define __NR_sigreturn 119
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#define __NR_clone 120
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#define __NR_setdomainname 121
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#define __NR_uname 122
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#define __NR_modify_ldt 123
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#define __NR_adjtimex 124
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#define __NR_mprotect 125
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#define __NR_sigprocmask 126
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#define __NR_create_module 127
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#define __NR_init_module 128
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#define __NR_delete_module 129
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#define __NR_get_kernel_syms 130
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#define __NR_quotactl 131
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#define __NR_getpgid 132
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#define __NR_fchdir 133
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#define __NR_bdflush 134
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#define __NR_sysfs 135
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#define __NR_personality 136
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#define __NR_afs_syscall 137 /* Syscall for Andrew File System */
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#define __NR_setfsuid 138
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#define __NR_setfsgid 139
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#define __NR__llseek 140
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#define __NR_getdents 141
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#define __NR__newselect 142
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#define __NR_flock 143
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#define __NR_msync 144
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#define __NR_readv 145
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#define __NR_writev 146
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#define __NR_cacheflush 147
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#define __NR_cachectl 148
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#define __NR_sysxtensa 149
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#define __NR_sysdummy 150
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#define __NR_getsid 151
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#define __NR_fdatasync 152
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#define __NR__sysctl 153
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#define __NR_mlock 154
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#define __NR_munlock 155
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#define __NR_mlockall 156
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#define __NR_munlockall 157
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#define __NR_sched_setparam 158
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#define __NR_sched_getparam 159
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#define __NR_sched_setscheduler 160
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#define __NR_sched_getscheduler 161
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#define __NR_sched_yield 162
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#define __NR_sched_get_priority_max 163
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#define __NR_sched_get_priority_min 164
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#define __NR_sched_rr_get_interval 165
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#define __NR_nanosleep 166
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#define __NR_mremap 167
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#define __NR_accept 168
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#define __NR_bind 169
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#define __NR_connect 170
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#define __NR_getpeername 171
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#define __NR_getsockname 172
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#define __NR_getsockopt 173
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#define __NR_listen 174
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#define __NR_recv 175
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#define __NR_recvfrom 176
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#define __NR_recvmsg 177
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#define __NR_send 178
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#define __NR_sendmsg 179
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#define __NR_sendto 180
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#define __NR_setsockopt 181
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#define __NR_shutdown 182
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#define __NR_socket 183
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#define __NR_socketpair 184
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#define __NR_setresuid 185
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#define __NR_getresuid 186
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#define __NR_query_module 187
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#define __NR_poll 188
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#define __NR_nfsservctl 189
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#define __NR_setresgid 190
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#define __NR_getresgid 191
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#define __NR_prctl 192
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#define __NR_rt_sigreturn 193
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#define __NR_rt_sigaction 194
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#define __NR_rt_sigprocmask 195
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#define __NR_rt_sigpending 196
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#define __NR_rt_sigtimedwait 197
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#define __NR_rt_sigqueueinfo 198
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#define __NR_rt_sigsuspend 199
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#define __NR_pread 200
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#define __NR_pwrite 201
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#define __NR_chown 202
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#define __NR_getcwd 203
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#define __NR_capget 204
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#define __NR_capset 205
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#define __NR_sigaltstack 206
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#define __NR_sendfile 207
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#define __NR_streams1 208 /* some people actually want it */
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#define __NR_streams2 209 /* some people actually want it */
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#define __NR_mmap2 210
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#define __NR_truncate64 211
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#define __NR_ftruncate64 212
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#define __NR_stat64 213
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#define __NR_lstat64 214
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#define __NR_fstat64 215
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#define __NR_pivot_root 216
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#define __NR_mincore 217
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#define __NR_madvise 218
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#define __NR_getdents64 219
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#define __NR_vfork 220
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/* Keep this last; should always equal the last valid call number. */
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#define __NR_Linux_syscalls 220
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/* user-visible error numbers are in the range -1 - -125: see
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* <asm-xtensa/errno.h> */
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#define SYSXTENSA_RESERVED 0 /* don't use this */
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#define SYSXTENSA_ATOMIC_SET 1 /* set variable */
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#define SYSXTENSA_ATOMIC_EXG_ADD 2 /* exchange memory and add */
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#define SYSXTENSA_ATOMIC_ADD 3 /* add to memory */
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#define SYSXTENSA_ATOMIC_CMP_SWP 4 /* compare and swap */
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#define SYSXTENSA_COUNT 5 /* count of syscall0 functions*/
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#ifdef __KERNEL__
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#define __syscall_return(type, res) return ((type)(res))
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#else
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#define __syscall_return(type, res) \
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do { \
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if ((unsigned long)(res) >= (unsigned long)(-125)) { \
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/* Avoid using "res" which is declared to be in register r2; \
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* errno might expand to a function call and clobber it. */ \
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int __err = -(res); \
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errno = __err; \
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res = -1; \
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} \
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return (type) (res); \
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} while (0)
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#endif
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/* Tensilica's xt-xcc compiler is much more agressive at code
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* optimization than gcc. Multiple __asm__ statements are
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* insufficient for xt-xcc because subsequent optimization passes
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* (beyond the front-end that knows of __asm__ statements and other
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* such GNU Extensions to C) can modify the register selection for
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* containment of C variables.
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*
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* xt-xcc cannot modify the contents of a single __asm__ statement, so
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* we create single-asm versions of the syscall macros that are
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* suitable and optimal for both xt-xcc and gcc.
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*
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* Linux takes system-call arguments in registers. The following
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* design is optimized for user-land apps (e.g., glibc) which
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* typically have a function wrapper around the "syscall" assembly
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* instruction. It satisfies the Xtensa ABI while minizing argument
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* shifting.
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*
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* The Xtensa ABI and software conventions require the system-call
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* number in a2. If an argument exists in a2, we move it to the next
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* available register. Note that for improved efficiency, we do NOT
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* shift all parameters down one register to maintain the original
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* order.
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*
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* At best case (zero arguments), we just write the syscall number to
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* a2. At worst case (1 to 6 arguments), we move the argument in a2
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* to the next available register, then write the syscall number to
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* a2.
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*
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* For clarity, the following truth table enumerates all possibilities.
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*
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* arguments syscall number arg0, arg1, arg2, arg3, arg4, arg5
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* --------- -------------- ----------------------------------
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* 0 a2
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* 1 a2 a3
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* 2 a2 a4, a3
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* 3 a2 a5, a3, a4
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* 4 a2 a6, a3, a4, a5
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* 5 a2 a7, a3, a4, a5, a6
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* 6 a2 a8, a3, a4, a5, a6, a7
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*/
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#define _syscall0(type,name) \
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type name(void) \
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{ \
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long __res; \
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__asm__ __volatile__ ( \
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" movi a2, %1 \n" \
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" syscall \n" \
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" mov %0, a2 \n" \
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: "=a" (__res) \
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: "i" (__NR_##name) \
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: "a2" \
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); \
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__syscall_return(type,__res); \
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}
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#define _syscall1(type,name,type0,arg0) \
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type name(type0 arg0) \
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{ \
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long __res; \
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__asm__ __volatile__ ( \
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" mov a3, %2 \n" \
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" movi a2, %1 \n" \
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" syscall \n" \
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" mov %0, a2 \n" \
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: "=a" (__res) \
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: "i" (__NR_##name), "a" (arg0) \
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: "a2", "a3" \
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); \
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__syscall_return(type,__res); \
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}
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#define _syscall2(type,name,type0,arg0,type1,arg1) \
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type name(type0 arg0,type1 arg1) \
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{ \
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long __res; \
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__asm__ __volatile__ ( \
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" mov a4, %2 \n" \
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" mov a3, %3 \n" \
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" movi a2, %1 \n" \
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" syscall \n" \
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" mov %0, a2 \n" \
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: "=a" (__res) \
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: "i" (__NR_##name), "a" (arg0), "a" (arg1) \
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: "a2", "a3", "a4" \
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); \
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__syscall_return(type,__res); \
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}
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#define _syscall3(type,name,type0,arg0,type1,arg1,type2,arg2) \
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type name(type0 arg0,type1 arg1,type2 arg2) \
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{ \
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long __res; \
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__asm__ __volatile__ ( \
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" mov a5, %2 \n" \
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" mov a4, %4 \n" \
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" mov a3, %3 \n" \
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" movi a2, %1 \n" \
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" syscall \n" \
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" mov %0, a2 \n" \
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: "=a" (__res) \
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: "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2) \
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: "a2", "a3", "a4", "a5" \
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); \
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__syscall_return(type,__res); \
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}
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#define _syscall4(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3) \
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type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3) \
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{ \
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long __res; \
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__asm__ __volatile__ ( \
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" mov a6, %2 \n" \
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" mov a5, %5 \n" \
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" mov a4, %4 \n" \
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" mov a3, %3 \n" \
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" movi a2, %1 \n" \
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" syscall \n" \
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" mov %0, a2 \n" \
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: "=a" (__res) \
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: "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2), "a" (arg3) \
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: "a2", "a3", "a4", "a5", "a6" \
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); \
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__syscall_return(type,__res); \
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}
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/* Note that we save and restore the a7 frame pointer.
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* Including a7 in the clobber list doesn't do what you'd expect.
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*/
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#define _syscall5(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
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type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3,type4 arg4) \
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{ \
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long __res; \
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__asm__ __volatile__ ( \
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" mov a9, a7 \n" \
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" mov a7, %2 \n" \
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" mov a6, %6 \n" \
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" mov a5, %5 \n" \
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" mov a4, %4 \n" \
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" mov a3, %3 \n" \
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" movi a2, %1 \n" \
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" syscall \n" \
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" mov a7, a9 \n" \
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" mov %0, a2 \n" \
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: "=a" (__res) \
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: "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2), \
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"a" (arg3), "a" (arg4) \
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: "a2", "a3", "a4", "a5", "a6", "a9" \
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); \
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__syscall_return(type,__res); \
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}
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/* Note that we save and restore the a7 frame pointer.
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* Including a7 in the clobber list doesn't do what you'd expect.
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*/
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#define _syscall6(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5) \
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type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5) \
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{ \
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long __res; \
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__asm__ __volatile__ ( \
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" mov a9, a7 \n" \
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" mov a8, %2 \n" \
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" mov a7, %7 \n" \
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" mov a6, %6 \n" \
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" mov a5, %5 \n" \
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" mov a4, %4 \n" \
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" mov a3, %3 \n" \
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" movi a2, %1 \n" \
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" syscall \n" \
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" mov a7, a9 \n" \
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" mov %0, a2 \n" \
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: "=a" (__res) \
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: "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2), \
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"a" (arg3), "a" (arg4), "a" (arg5) \
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: "a2", "a3", "a4", "a5", "a6", "a8", "a9" \
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); \
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__syscall_return(type,__res); \
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}
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#ifdef __KERNEL_SYSCALLS__
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#include <linux/compiler.h>
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#include <linux/types.h>
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#include <linux/syscalls.h>
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/*
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* we need this inline - forking from kernel space will result
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* in NO COPY ON WRITE (!!!), until an execve is executed. This
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* is no problem, but for the stack. This is handled by not letting
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* main() use the stack at all after fork(). Thus, no function
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* calls - which means inline code for fork too, as otherwise we
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* would use the stack upon exit from 'fork()'.
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*
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* Actually only pause and fork are needed inline, so that there
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* won't be any messing with the stack from main(), but we define
|
|
* some others too.
|
|
*/
|
|
|
|
#define __NR__exit __NR_exit
|
|
|
|
static __inline__ _syscall0(int,pause)
|
|
//static __inline__ _syscall1(int,setup,int,magic) FIXME
|
|
static __inline__ _syscall0(int,sync)
|
|
static __inline__ _syscall0(pid_t,setsid)
|
|
static __inline__ _syscall3(int,write,int,fd,const char *,buf,off_t,count)
|
|
static __inline__ _syscall3(int,read,int,fd,char *,buf,off_t,count)
|
|
static __inline__ _syscall3(off_t,lseek,int,fd,off_t,offset,int,count)
|
|
static __inline__ _syscall1(int,dup,int,fd)
|
|
static __inline__ _syscall3(int,execve,const char*,file,char**,argv,char**,envp)
|
|
static __inline__ _syscall3(int,open,const char *,file,int,flag,int,mode)
|
|
static __inline__ _syscall1(int,close,int,fd)
|
|
static __inline__ _syscall1(int,_exit,int,exitcode)
|
|
static __inline__ _syscall3(pid_t,waitpid,pid_t,pid,int *,wait_stat,int,options)
|
|
static __inline__ _syscall1(int,delete_module,const char *,name)
|
|
|
|
struct stat;
|
|
static __inline__ _syscall2(int,fstat,int,fd,struct stat *,buf)
|
|
static __inline__ _syscall0(pid_t,getpid)
|
|
static __inline__ _syscall2(int,kill,int,pid,int,sig)
|
|
static __inline__ _syscall2(int,stat,const char *, path,struct stat *,buf)
|
|
static __inline__ _syscall1(int,unlink,char *,pathname)
|
|
|
|
|
|
|
|
extern pid_t waitpid(int, int*, int );
|
|
static __inline__ pid_t wait(int * wait_stat)
|
|
{
|
|
return waitpid(-1,wait_stat,0);
|
|
}
|
|
#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_IPC_PARSE_VERSION
|
|
#define __ARCH_WANT_OLD_READDIR
|
|
#define __ARCH_WANT_OLD_STAT
|
|
#define __ARCH_WANT_STAT64
|
|
#define __ARCH_WANT_SYS_ALARM
|
|
#define __ARCH_WANT_SYS_GETHOSTNAME
|
|
#define __ARCH_WANT_SYS_PAUSE
|
|
#define __ARCH_WANT_SYS_SGETMASK
|
|
#define __ARCH_WANT_SYS_SIGNAL
|
|
#define __ARCH_WANT_SYS_TIME
|
|
#define __ARCH_WANT_SYS_UTIME
|
|
#define __ARCH_WANT_SYS_WAITPID
|
|
#define __ARCH_WANT_SYS_SOCKETCALL
|
|
#define __ARCH_WANT_SYS_FADVISE64
|
|
#define __ARCH_WANT_SYS_GETPGRP
|
|
#define __ARCH_WANT_SYS_LLSEEK
|
|
#define __ARCH_WANT_SYS_NICE
|
|
#define __ARCH_WANT_SYS_OLD_GETRLIMIT
|
|
#define __ARCH_WANT_SYS_OLDUMOUNT
|
|
#define __ARCH_WANT_SYS_SIGPENDING
|
|
#define __ARCH_WANT_SYS_SIGPROCMASK
|
|
#define __ARCH_WANT_SYS_RT_SIGACTION
|
|
#endif
|
|
|
|
|
|
|
|
#endif /* _XTENSA_UNISTD_H */
|