ia64/linux-2.6.18-xen.hg

view arch/mips/kernel/scall64-64.S @ 452:c7ed6fe5dca0

kexec: dont initialise regions in reserve_memory()

There is no need to initialise efi_memmap_res and boot_param_res in
reserve_memory() for the initial xen domain as it is done in
machine_kexec_setup_resources() using values from the kexec hypercall.

Signed-off-by: Simon Horman <horms@verge.net.au>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Feb 28 10:55:18 2008 +0000 (2008-02-28)
parents 831230e53067
children
line source
1 /*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02 by Ralf Baechle
7 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
8 * Copyright (C) 2001 MIPS Technologies, Inc.
9 */
10 #include <linux/errno.h>
11 #include <asm/asm.h>
12 #include <asm/asmmacro.h>
13 #include <asm/irqflags.h>
14 #include <asm/mipsregs.h>
15 #include <asm/regdef.h>
16 #include <asm/stackframe.h>
17 #include <asm/asm-offsets.h>
18 #include <asm/sysmips.h>
19 #include <asm/thread_info.h>
20 #include <asm/unistd.h>
21 #include <asm/war.h>
23 #ifndef CONFIG_BINFMT_ELF32
24 /* Neither O32 nor N32, so define handle_sys here */
25 #define handle_sys64 handle_sys
26 #endif
28 .align 5
29 NESTED(handle_sys64, PT_SIZE, sp)
30 #if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32)
31 /*
32 * When 32-bit compatibility is configured scall_o32.S
33 * already did this.
34 */
35 .set noat
36 SAVE_SOME
37 TRACE_IRQS_ON
38 STI
39 .set at
40 #endif
42 dsubu t0, v0, __NR_64_Linux # check syscall number
43 sltiu t0, t0, __NR_64_Linux_syscalls + 1
44 #if !defined(CONFIG_MIPS32_O32) && !defined(CONFIG_MIPS32_N32)
45 ld t1, PT_EPC(sp) # skip syscall on return
46 daddiu t1, 4 # skip to next instruction
47 sd t1, PT_EPC(sp)
48 #endif
49 beqz t0, illegal_syscall
51 dsll t0, v0, 3 # offset into table
52 ld t2, (sys_call_table - (__NR_64_Linux * 8))(t0)
53 # syscall routine
55 sd a3, PT_R26(sp) # save a3 for syscall restarting
57 li t1, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT
58 LONG_L t0, TI_FLAGS($28) # syscall tracing enabled?
59 and t0, t1, t0
60 bnez t0, syscall_trace_entry
62 jalr t2 # Do The Real Thing (TM)
64 li t0, -EMAXERRNO - 1 # error?
65 sltu t0, t0, v0
66 sd t0, PT_R7(sp) # set error flag
67 beqz t0, 1f
69 dnegu v0 # error
70 sd v0, PT_R0(sp) # set flag for syscall
71 # restarting
72 1: sd v0, PT_R2(sp) # result
74 n64_syscall_exit:
75 local_irq_disable # make sure need_resched and
76 # signals dont change between
77 # sampling and return
78 LONG_L a2, TI_FLAGS($28) # current->work
79 li t0, _TIF_ALLWORK_MASK
80 and t0, a2, t0
81 bnez t0, n64_syscall_exit_work
83 j restore_partial
85 n64_syscall_exit_work:
86 j syscall_exit_work_partial
88 /* ------------------------------------------------------------------------ */
90 syscall_trace_entry:
91 SAVE_STATIC
92 move s0, t2
93 move a0, sp
94 li a1, 0
95 jal do_syscall_trace
97 move t0, s0
98 RESTORE_STATIC
99 ld a0, PT_R4(sp) # Restore argument registers
100 ld a1, PT_R5(sp)
101 ld a2, PT_R6(sp)
102 ld a3, PT_R7(sp)
103 ld a4, PT_R8(sp)
104 ld a5, PT_R9(sp)
105 jalr t0
107 li t0, -EMAXERRNO - 1 # error?
108 sltu t0, t0, v0
109 sd t0, PT_R7(sp) # set error flag
110 beqz t0, 1f
112 dnegu v0 # error
113 sd v0, PT_R0(sp) # set flag for syscall restarting
114 1: sd v0, PT_R2(sp) # result
116 j syscall_exit
118 illegal_syscall:
119 /* This also isn't a 64-bit syscall, throw an error. */
120 li v0, -ENOSYS # error
121 sd v0, PT_R2(sp)
122 li t0, 1 # set error flag
123 sd t0, PT_R7(sp)
124 j n64_syscall_exit
125 END(handle_sys64)
127 LEAF(mips_atomic_set)
128 andi v0, a1, 3 # must be word aligned
129 bnez v0, bad_alignment
131 LONG_L v1, TI_ADDR_LIMIT($28) # in legal address range?
132 LONG_ADDIU a0, a1, 4
133 or a0, a0, a1
134 and a0, a0, v1
135 bltz a0, bad_address
137 #ifdef CONFIG_CPU_HAS_LLSC
138 /* Ok, this is the ll/sc case. World is sane :-) */
139 1: ll v0, (a1)
140 move a0, a2
141 2: sc a0, (a1)
142 #if R10000_LLSC_WAR
143 beqzl a0, 1b
144 #else
145 beqz a0, 1b
146 #endif
148 .section __ex_table,"a"
149 PTR 1b, bad_stack
150 PTR 2b, bad_stack
151 .previous
152 #else
153 sw a1, 16(sp)
154 sw a2, 20(sp)
156 move a0, sp
157 move a2, a1
158 li a1, 1
159 jal do_page_fault
161 lw a1, 16(sp)
162 lw a2, 20(sp)
164 /*
165 * At this point the page should be readable and writable unless
166 * there was no more memory available.
167 */
168 1: lw v0, (a1)
169 2: sw a2, (a1)
171 .section __ex_table,"a"
172 PTR 1b, no_mem
173 PTR 2b, no_mem
174 .previous
175 #endif
177 sd zero, PT_R7(sp) # success
178 sd v0, PT_R2(sp) # result
180 j n64_syscall_exit # continue like a normal syscall
182 no_mem: li v0, -ENOMEM
183 jr ra
185 bad_address:
186 li v0, -EFAULT
187 jr ra
189 bad_alignment:
190 li v0, -EINVAL
191 jr ra
192 END(mips_atomic_set)
194 LEAF(sys_sysmips)
195 beq a0, MIPS_ATOMIC_SET, mips_atomic_set
196 j _sys_sysmips
197 END(sys_sysmips)
199 .align 3
200 sys_call_table:
201 PTR sys_read /* 5000 */
202 PTR sys_write
203 PTR sys_open
204 PTR sys_close
205 PTR sys_newstat
206 PTR sys_newfstat /* 5005 */
207 PTR sys_newlstat
208 PTR sys_poll
209 PTR sys_lseek
210 PTR old_mmap
211 PTR sys_mprotect /* 5010 */
212 PTR sys_munmap
213 PTR sys_brk
214 PTR sys_rt_sigaction
215 PTR sys_rt_sigprocmask
216 PTR sys_ioctl /* 5015 */
217 PTR sys_pread64
218 PTR sys_pwrite64
219 PTR sys_readv
220 PTR sys_writev
221 PTR sys_access /* 5020 */
222 PTR sys_pipe
223 PTR sys_select
224 PTR sys_sched_yield
225 PTR sys_mremap
226 PTR sys_msync /* 5025 */
227 PTR sys_mincore
228 PTR sys_madvise
229 PTR sys_shmget
230 PTR sys_shmat
231 PTR sys_shmctl /* 5030 */
232 PTR sys_dup
233 PTR sys_dup2
234 PTR sys_pause
235 PTR sys_nanosleep
236 PTR sys_getitimer /* 5035 */
237 PTR sys_setitimer
238 PTR sys_alarm
239 PTR sys_getpid
240 PTR sys_sendfile64
241 PTR sys_socket /* 5040 */
242 PTR sys_connect
243 PTR sys_accept
244 PTR sys_sendto
245 PTR sys_recvfrom
246 PTR sys_sendmsg /* 5045 */
247 PTR sys_recvmsg
248 PTR sys_shutdown
249 PTR sys_bind
250 PTR sys_listen
251 PTR sys_getsockname /* 5050 */
252 PTR sys_getpeername
253 PTR sys_socketpair
254 PTR sys_setsockopt
255 PTR sys_getsockopt
256 PTR sys_clone /* 5055 */
257 PTR sys_fork
258 PTR sys_execve
259 PTR sys_exit
260 PTR sys_wait4
261 PTR sys_kill /* 5060 */
262 PTR sys_newuname
263 PTR sys_semget
264 PTR sys_semop
265 PTR sys_semctl
266 PTR sys_shmdt /* 5065 */
267 PTR sys_msgget
268 PTR sys_msgsnd
269 PTR sys_msgrcv
270 PTR sys_msgctl
271 PTR sys_fcntl /* 5070 */
272 PTR sys_flock
273 PTR sys_fsync
274 PTR sys_fdatasync
275 PTR sys_truncate
276 PTR sys_ftruncate /* 5075 */
277 PTR sys_getdents
278 PTR sys_getcwd
279 PTR sys_chdir
280 PTR sys_fchdir
281 PTR sys_rename /* 5080 */
282 PTR sys_mkdir
283 PTR sys_rmdir
284 PTR sys_creat
285 PTR sys_link
286 PTR sys_unlink /* 5085 */
287 PTR sys_symlink
288 PTR sys_readlink
289 PTR sys_chmod
290 PTR sys_fchmod
291 PTR sys_chown /* 5090 */
292 PTR sys_fchown
293 PTR sys_lchown
294 PTR sys_umask
295 PTR sys_gettimeofday
296 PTR sys_getrlimit /* 5095 */
297 PTR sys_getrusage
298 PTR sys_sysinfo
299 PTR sys_times
300 PTR sys_ptrace
301 PTR sys_getuid /* 5100 */
302 PTR sys_syslog
303 PTR sys_getgid
304 PTR sys_setuid
305 PTR sys_setgid
306 PTR sys_geteuid /* 5105 */
307 PTR sys_getegid
308 PTR sys_setpgid
309 PTR sys_getppid
310 PTR sys_getpgrp
311 PTR sys_setsid /* 5110 */
312 PTR sys_setreuid
313 PTR sys_setregid
314 PTR sys_getgroups
315 PTR sys_setgroups
316 PTR sys_setresuid /* 5115 */
317 PTR sys_getresuid
318 PTR sys_setresgid
319 PTR sys_getresgid
320 PTR sys_getpgid
321 PTR sys_setfsuid /* 5120 */
322 PTR sys_setfsgid
323 PTR sys_getsid
324 PTR sys_capget
325 PTR sys_capset
326 PTR sys_rt_sigpending /* 5125 */
327 PTR sys_rt_sigtimedwait
328 PTR sys_rt_sigqueueinfo
329 PTR sys_rt_sigsuspend
330 PTR sys_sigaltstack
331 PTR sys_utime /* 5130 */
332 PTR sys_mknod
333 PTR sys_personality
334 PTR sys_ustat
335 PTR sys_statfs
336 PTR sys_fstatfs /* 5135 */
337 PTR sys_sysfs
338 PTR sys_getpriority
339 PTR sys_setpriority
340 PTR sys_sched_setparam
341 PTR sys_sched_getparam /* 5140 */
342 PTR sys_sched_setscheduler
343 PTR sys_sched_getscheduler
344 PTR sys_sched_get_priority_max
345 PTR sys_sched_get_priority_min
346 PTR sys_sched_rr_get_interval /* 5145 */
347 PTR sys_mlock
348 PTR sys_munlock
349 PTR sys_mlockall
350 PTR sys_munlockall
351 PTR sys_vhangup /* 5150 */
352 PTR sys_pivot_root
353 PTR sys_sysctl
354 PTR sys_prctl
355 PTR sys_adjtimex
356 PTR sys_setrlimit /* 5155 */
357 PTR sys_chroot
358 PTR sys_sync
359 PTR sys_acct
360 PTR sys_settimeofday
361 PTR sys_mount /* 5160 */
362 PTR sys_umount
363 PTR sys_swapon
364 PTR sys_swapoff
365 PTR sys_reboot
366 PTR sys_sethostname /* 5165 */
367 PTR sys_setdomainname
368 PTR sys_ni_syscall /* was create_module */
369 PTR sys_init_module
370 PTR sys_delete_module
371 PTR sys_ni_syscall /* 5170, was get_kernel_syms */
372 PTR sys_ni_syscall /* was query_module */
373 PTR sys_quotactl
374 PTR sys_nfsservctl
375 PTR sys_ni_syscall /* res. for getpmsg */
376 PTR sys_ni_syscall /* 5175 for putpmsg */
377 PTR sys_ni_syscall /* res. for afs_syscall */
378 PTR sys_ni_syscall /* res. for security */
379 PTR sys_gettid
380 PTR sys_readahead
381 PTR sys_setxattr /* 5180 */
382 PTR sys_lsetxattr
383 PTR sys_fsetxattr
384 PTR sys_getxattr
385 PTR sys_lgetxattr
386 PTR sys_fgetxattr /* 5185 */
387 PTR sys_listxattr
388 PTR sys_llistxattr
389 PTR sys_flistxattr
390 PTR sys_removexattr
391 PTR sys_lremovexattr /* 5190 */
392 PTR sys_fremovexattr
393 PTR sys_tkill
394 PTR sys_ni_syscall
395 PTR sys_futex
396 PTR sys_sched_setaffinity /* 5195 */
397 PTR sys_sched_getaffinity
398 PTR sys_cacheflush
399 PTR sys_cachectl
400 PTR sys_sysmips
401 PTR sys_io_setup /* 5200 */
402 PTR sys_io_destroy
403 PTR sys_io_getevents
404 PTR sys_io_submit
405 PTR sys_io_cancel
406 PTR sys_exit_group /* 5205 */
407 PTR sys_lookup_dcookie
408 PTR sys_epoll_create
409 PTR sys_epoll_ctl
410 PTR sys_epoll_wait
411 PTR sys_remap_file_pages /* 5210 */
412 PTR sys_rt_sigreturn
413 PTR sys_set_tid_address
414 PTR sys_restart_syscall
415 PTR sys_semtimedop
416 PTR sys_fadvise64_64 /* 5215 */
417 PTR sys_timer_create
418 PTR sys_timer_settime
419 PTR sys_timer_gettime
420 PTR sys_timer_getoverrun
421 PTR sys_timer_delete /* 5220 */
422 PTR sys_clock_settime
423 PTR sys_clock_gettime
424 PTR sys_clock_getres
425 PTR sys_clock_nanosleep
426 PTR sys_tgkill /* 5225 */
427 PTR sys_utimes
428 PTR sys_mbind
429 PTR sys_ni_syscall /* sys_get_mempolicy */
430 PTR sys_ni_syscall /* sys_set_mempolicy */
431 PTR sys_mq_open /* 5230 */
432 PTR sys_mq_unlink
433 PTR sys_mq_timedsend
434 PTR sys_mq_timedreceive
435 PTR sys_mq_notify
436 PTR sys_mq_getsetattr /* 5235 */
437 PTR sys_ni_syscall /* sys_vserver */
438 PTR sys_waitid
439 PTR sys_ni_syscall /* available, was setaltroot */
440 PTR sys_add_key
441 PTR sys_request_key /* 5240 */
442 PTR sys_keyctl
443 PTR sys_set_thread_area
444 PTR sys_inotify_init
445 PTR sys_inotify_add_watch
446 PTR sys_inotify_rm_watch /* 5245 */
447 PTR sys_migrate_pages
448 PTR sys_openat
449 PTR sys_mkdirat
450 PTR sys_mknodat
451 PTR sys_fchownat /* 5250 */
452 PTR sys_futimesat
453 PTR sys_newfstatat
454 PTR sys_unlinkat
455 PTR sys_renameat
456 PTR sys_linkat /* 5255 */
457 PTR sys_symlinkat
458 PTR sys_readlinkat
459 PTR sys_fchmodat
460 PTR sys_faccessat
461 PTR sys_pselect6 /* 5260 */
462 PTR sys_ppoll
463 PTR sys_unshare
464 PTR sys_splice
465 PTR sys_sync_file_range
466 PTR sys_tee /* 5265 */
467 PTR sys_vmsplice
468 PTR sys_move_pages