2 * File: arch/blackfin/mach-common/entry.S
4 * Author: Linus Torvalds
7 * Description: contains the system-call and fault low-level handling routines.
8 * This also contains the timer-interrupt handler, as well as all
9 * interrupts and faults that can result in a task-switch.
12 * Copyright 2004-2006 Analog Devices Inc.
14 * Bugs: Enter bugs at http://blackfin.uclinux.org/
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, see the file COPYING, or write
28 * to the Free Software Foundation, Inc.,
29 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
32 /* NOTE: This code handles signal-recognition, which happens every time
33 * after a timer-interrupt and after each system call.
36 #include <linux/init.h>
37 #include <linux/linkage.h>
38 #include <linux/unistd.h>
39 #include <asm/blackfin.h>
40 #include <asm/errno.h>
41 #include <asm/fixed_code.h>
42 #include <asm/thread_info.h> /* TIF_NEED_RESCHED */
43 #include <asm/asm-offsets.h>
44 #include <asm/trace.h>
46 #include <asm/mach-common/context.S>
48 #if defined(CONFIG_BFIN_SCRATCH_REG_RETN)
49 # define EX_SCRATCH_REG RETN
50 #elif defined(CONFIG_BFIN_SCRATCH_REG_RETE)
51 # define EX_SCRATCH_REG RETE
53 # define EX_SCRATCH_REG CYCLES
56 #ifdef CONFIG_EXCPT_IRQ_SYSC_L1
62 /* Slightly simplified and streamlined entry point for CPLB misses.
63 * This one does not lower the level to IRQ5, and thus can be used to
64 * patch up CPLB misses on the kernel stack.
67 #define _ex_dviol _ex_workaround_261
68 #define _ex_dmiss _ex_workaround_261
69 #define _ex_dmult _ex_workaround_261
71 ENTRY(_ex_workaround_261)
73 * Work around an anomaly: if we see a new DCPLB fault, return
74 * without doing anything. Then, if we get the same fault again,
77 P4 = R7; /* Store EXCAUSE */
78 p5.l = _last_cplb_fault_retx;
79 p5.h = _last_cplb_fault_retx;
84 if !cc jump _bfin_return_from_exception;
87 R6 = 0x26; /* Data CPLB Miss */
89 if cc jump _ex_dcplb_miss (BP);
90 R6 = 0x23; /* Data CPLB Miss */
92 if cc jump _ex_dcplb_viol (BP);
93 /* Handle 0x23 Data CPLB Protection Violation
94 * and Data CPLB Multiple Hits - Linux Trap Zero
97 ENDPROC(_ex_workaround_261)
101 #define _ex_dviol _ex_dcplb_viol
103 #define _ex_dviol _ex_trap_c
105 #define _ex_dmiss _ex_dcplb_miss
106 #define _ex_dmult _ex_trap_c
110 ENTRY(_ex_dcplb_viol)
111 ENTRY(_ex_dcplb_miss)
112 ENTRY(_ex_icplb_miss)
113 (R7:6,P5:4) = [sp++];
117 /* We must load R1 here, _before_ DEBUG_HWTRACE_SAVE, since that
118 * will change the stack pointer. */
122 DEBUG_HWTRACE_SAVE(p5, r7)
128 IF !CC JUMP _handle_bad_cplb;
132 DEBUG_HWTRACE_RESTORE(p5, r7)
136 ENDPROC(_ex_icplb_miss)
139 (R7:6,P5:4) = [sp++];
141 raise 15; /* invoked by TRAP #0, for sys call */
153 ENTRY(_ex_single_step)
154 /* If we just returned from an interrupt, the single step event is
155 for the RTI instruction. */
159 if cc jump _bfin_return_from_exception;
162 /* Don't do single step in hardware exception handler */
167 if cc jump _bfin_return_from_exception;
169 /* skip single step if current interrupt priority is higher than
170 * that of the first instruction, from which gdb starts single step */
173 .Lfind_priority_start:
175 if cc jump .Lfind_priority_done;
179 if cc jump .Lfind_priority_done;
180 jump.s .Lfind_priority_start;
181 .Lfind_priority_done:
182 p4.l = _debugger_step;
183 p4.h = _debugger_step;
186 if cc jump .Ldo_single_step;
189 if cc jump _bfin_return_from_exception;
193 /* If we were in user mode, do the single step normally. */
202 /* Single stepping only a single instruction, so clear the trace
211 * We were in an interrupt handler. By convention, all of them save
212 * SYSCFG with their first instruction, so by checking whether our
213 * RETX points at the entry point, we can determine whether to allow
214 * a single step, or whether to clear SYSCFG.
216 * First, find out the interrupt level and the event vector for it.
226 /* What we actually do is test for the _second_ instruction in the
227 * IRQ handler. That way, if there are insns following the restore
228 * of SYSCFG after leaving the handler, we will not turn off SYSCFG
235 if !cc jump _bfin_return_from_exception;
241 /* Fall through to _bfin_return_from_exception. */
242 ENDPROC(_ex_single_step)
244 ENTRY(_bfin_return_from_exception)
251 (R7:6,P5:4) = [sp++];
255 ENDPROC(_bfin_return_from_exception)
257 ENTRY(_handle_bad_cplb)
258 DEBUG_HWTRACE_RESTORE(p5, r7)
259 /* To get here, we just tried and failed to change a CPLB
260 * so, handle things in trap_c (C code), by lowering to
261 * IRQ5, just like we normally do. Since this is not a
262 * "normal" return path, we have a do alot of stuff to
263 * the stack to get ready so, we can fall through - we
264 * need to make a CPLB exception look like a normal exception
269 [--sp] = (R7:6,P5:4);
271 ENTRY(_ex_replaceable)
275 /* Make sure we are not in a double fault */
280 if CC jump _double_fault;
282 /* Call C code (trap_c) to handle the exception, which most
283 * likely involves sending a signal to the current process.
284 * To avoid double faults, lower our priority to IRQ5 first.
286 P5.h = _exception_to_level5;
287 P5.l = _exception_to_level5;
293 p4.l = lo(DCPLB_FAULT_ADDR);
294 p4.h = hi(DCPLB_FAULT_ADDR);
296 p5.h = _saved_dcplb_fault_addr;
297 p5.l = _saved_dcplb_fault_addr;
300 r7 = [p4 + (ICPLB_FAULT_ADDR - DCPLB_FAULT_ADDR)];
301 p5.h = _saved_icplb_fault_addr;
302 p5.l = _saved_icplb_fault_addr;
305 p4.l = _excpt_saved_stuff;
306 p4.h = _excpt_saved_stuff;
316 /* Disable all interrupts, but make sure level 5 is enabled so
317 * we can switch to that level. Save the old mask. */
321 p4.l = lo(SAFE_USER_INSTRUCTION);
322 p4.h = hi(SAFE_USER_INSTRUCTION);
328 (R7:6,P5:4) = [sp++];
335 /* We just realized we got an exception, while we were processing a different
336 * exception. This is a unrecoverable event, so crash
339 /* Turn caches & protection off, to ensure we don't get any more
343 P4.L = LO(IMEM_CONTROL);
344 P4.H = HI(IMEM_CONTROL);
346 R5 = [P4]; /* Control Register*/
347 BITCLR(R5,ENICPLB_P);
348 SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */
353 P4.L = LO(DMEM_CONTROL);
354 P4.H = HI(DMEM_CONTROL);
356 BITCLR(R5,ENDCPLB_P);
357 SSYNC; /* SSYNC required before writing to DMEM_CONTROL. */
362 /* Fix up the stack */
363 (R7:6,P5:4) = [sp++];
367 /* We should be out of the exception stack, and back down into
368 * kernel or user space stack
372 /* The dumping functions expect the return address in the RETI
377 r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */
379 call _double_fault_c;
381 .L_double_fault_panic:
382 JUMP .L_double_fault_panic
384 ENDPROC(_double_fault)
386 ENTRY(_exception_to_level5)
389 p4.l = _excpt_saved_stuff;
390 p4.h = _excpt_saved_stuff;
395 [sp + PT_SYSCFG] = r6;
397 /* Restore interrupt mask. We haven't pushed RETI, so this
398 * doesn't enable interrupts until we return from this handler. */
402 /* Restore the hardware error vector. */
413 r0 = [p2]; /* Read current IPEND */
414 [sp + PT_IPEND] = r0; /* Store IPEND */
416 r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */
421 call _ret_from_exception;
424 ENDPROC(_exception_to_level5)
426 ENTRY(_trap) /* Exception: 4th entry into system event table(supervisor mode)*/
427 /* Since the kernel stack can be anywhere, it's not guaranteed to be
428 * covered by a CPLB. Switch to an exception stack; use RETN as a
429 * scratch register (for want of a better option).
432 sp.l = _exception_stack_top;
433 sp.h = _exception_stack_top;
434 /* Try to deal with syscalls quickly. */
436 [--sp] = (R7:6,P5:4);
437 r7 = SEQSTAT; /* reason code is in bit 5:0 */
438 r6.l = lo(SEQSTAT_EXCAUSE);
439 r6.h = hi(SEQSTAT_EXCAUSE);
449 r7 = -ENOSYS; /* signextending enough */
450 [sp + PT_R0] = r7; /* return value from system call */
451 jump .Lsyscall_really_exit;
454 ENTRY(_kernel_execve)
457 r3 = SIZEOF_PTREGS / 4;
472 /* Success. Copy our temporary pt_regs to the top of the kernel
473 * stack and do a normal exception return.
476 r0 = (-KERNEL_STACK_SIZE) (x);
480 r0 = KERNEL_STACK_SIZE - 4 (z);
486 r3 = SIZEOF_PTREGS / 4;
492 if ! cc jump 0b (bp);
494 r0 = (KERNEL_STACK_SIZE - SIZEOF_PTREGS) (z);
499 [SP + PT_SYSCFG] = r0;
500 [p3 + (TASK_THREAD + THREAD_KSP)] = sp;
507 ENDPROC(_kernel_execve)
515 [sp + PT_IPEND] = r0;
517 /* Store RETS for now */
519 [sp + PT_RESERVED] = r0;
520 /* Set the stack for the current process */
522 r6.l = lo(ALIGN_PAGE_MASK);
523 r6.h = hi(ALIGN_PAGE_MASK);
524 r7 = r7 & r6; /* thread_info */
528 [p2+(TASK_THREAD+THREAD_KSP)] = sp;
530 /* Check the System Call */
532 /* System call number is passed in P0 */
535 if ! cc jump .Lbadsys;
537 /* are we tracing syscalls?*/
539 r6.l = lo(ALIGN_PAGE_MASK);
540 r6.h = hi(ALIGN_PAGE_MASK);
544 CC = BITTST(r7,TIF_SYSCALL_TRACE);
545 if CC JUMP _sys_trace;
547 /* Execute the appropriate system call */
550 p5.l = _sys_call_table;
551 p5.h = _sys_call_table;
568 r4.l = lo(ALIGN_PAGE_MASK);
569 r4.h = hi(ALIGN_PAGE_MASK);
570 r7 = r7 & r4; /* thread_info->flags */
572 .Lresume_userspace_1:
573 /* Disable interrupts. */
577 r7 = [p5 + TI_FLAGS];
578 r4.l = lo(_TIF_WORK_MASK);
579 r4.h = hi(_TIF_WORK_MASK);
583 cc = BITTST(r7, TIF_NEED_RESCHED);
584 if !cc jump .Lsyscall_sigpending;
586 /* Reenable interrupts. */
594 jump .Lresume_userspace_1;
596 .Lsyscall_sigpending:
597 cc = BITTST(r7, TIF_RESTORE_SIGMASK);
598 if cc jump .Lsyscall_do_signals;
599 cc = BITTST(r7, TIF_SIGPENDING);
600 if !cc jump .Lsyscall_really_exit;
601 .Lsyscall_do_signals:
602 /* Reenable interrupts. */
611 .Lsyscall_really_exit:
612 r5 = [sp + PT_RESERVED];
615 ENDPROC(_system_call)
620 /* Execute the appropriate system call */
623 p5.l = _sys_call_table;
624 p5.h = _sys_call_table;
643 jump .Lresume_userspace;
648 * Beware - when entering resume, prev (the current task) is
649 * in r0, next (the new task) is in r1.
655 [--sp] = (r7:4, p5:3);
659 [p0+(TASK_THREAD+THREAD_USP)] = p2;
661 /* save current kernel stack pointer */
662 [p0+(TASK_THREAD+THREAD_KSP)] = sp;
664 /* save program counter */
665 r1.l = _new_old_task;
666 r1.h = _new_old_task;
667 [p0+(TASK_THREAD+THREAD_PC)] = r1;
669 /* restore the kernel stack pointer */
670 sp = [p1+(TASK_THREAD+THREAD_KSP)];
672 /* restore user stack pointer */
673 p0 = [p1+(TASK_THREAD+THREAD_USP)];
677 p0 = [p1+(TASK_THREAD+THREAD_PC)];
681 * Following code actually lands up in a new (old) task.
685 (r7:4, p5:3) = [sp++];
690 * When we come out of resume, r0 carries "old" task, becuase we are
696 ENTRY(_ret_from_exception)
702 [sp + PT_IPEND] = r0;
708 if !cc jump 4f; /* if not return to user mode, get out */
710 /* Make sure any pending system call or deferred exception
711 * return in ILAT for this process to get executed, otherwise
712 * in case context switch happens, system call of
713 * first process (i.e in ILAT) will be carried
714 * forward to the switched process
720 r1 = (EVT_IVG14 | EVT_IVG15) (z);
725 /* Set the stack for the current process */
727 r4.l = lo(ALIGN_PAGE_MASK);
728 r4.h = hi(ALIGN_PAGE_MASK);
729 r7 = r7 & r4; /* thread_info->flags */
731 r7 = [p5 + TI_FLAGS];
732 r4.l = lo(_TIF_WORK_MASK);
733 r4.h = hi(_TIF_WORK_MASK);
740 p1.l = _schedule_and_signal;
741 p1.h = _schedule_and_signal;
744 raise 15; /* raise evt14 to do signal or reschedule */
751 ENDPROC(_ret_from_exception)
753 ENTRY(_return_from_int)
754 /* If someone else already raised IRQ 15, do nothing. */
759 cc = bittst (r0, EVT_IVG15_P);
762 /* if not return to user mode, get out */
776 /* Lower the interrupt level to 15. */
779 p1.l = _schedule_and_signal_from_int;
780 p1.h = _schedule_and_signal_from_int;
784 r0.l = lo(SAFE_USER_INSTRUCTION);
785 r0.h = hi(SAFE_USER_INSTRUCTION);
790 raise 15; /* raise evt15 to do signal or reschedule */
794 ENDPROC(_return_from_int)
796 ENTRY(_lower_to_irq14)
798 r0.l = lo(SAFE_USER_INSTRUCTION);
799 r0.h = hi(SAFE_USER_INSTRUCTION);
806 ENTRY(_evt14_softirq)
807 #ifdef CONFIG_DEBUG_HWERR
817 _schedule_and_signal_from_int:
818 /* To end up here, vector 15 was changed - so we have to change it
823 p1.l = _evt_system_call;
824 p1.h = _evt_system_call;
828 /* Set orig_p0 to -1 to indicate this isn't the end of a syscall. */
830 [sp + PT_ORIG_P0] = r0;
833 [sp + PT_RESERVED] = p1;
842 call _finish_atomic_sections;
844 jump.s .Lresume_userspace;
846 _schedule_and_signal:
848 /* To end up here, vector 15 was changed - so we have to change it
853 p1.l = _evt_system_call;
854 p1.h = _evt_system_call;
859 [sp + PT_RESERVED] = P0;
860 call .Lresume_userspace;
864 ENDPROC(_lower_to_irq14)
866 /* We handle this 100% in exception space - to reduce overhead
867 * Only potiential problem is if the software buffer gets swapped out of the
868 * CPLB table - then double fault. - so we don't let this happen in other places
870 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
871 ENTRY(_ex_trace_buff_full)
877 P5.L = _trace_buff_offset;
878 P5.H = _trace_buff_offset;
879 P3 = [P5]; /* trace_buff_offset */
883 R7 <<= 1; /* double, since we need to read twice */
885 R7 <<= 2; /* need to shift over again,
886 * to get the number of bytes */
889 R6 = ((1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN)*1024) - 1;
896 P2.L = _trace_buff_offset;
897 P2.H = _trace_buff_offset;
900 P2.L = _software_trace_buff;
901 P2.H = _software_trace_buff;
903 LSETUP (.Lstart, .Lend) LC0;
905 R7 = [P5]; /* read TBUF */
919 jump _bfin_return_from_exception;
920 ENDPROC(_ex_trace_buff_full)
922 #if CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN == 4
926 #endif /* CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN */
927 ENTRY(_trace_buff_offset)
930 ENTRY(_software_trace_buff)
931 .rept ((1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN)*256);
934 #endif /* CONFIG_DEBUG_BFIN_HWTRACE_EXPAND */
936 #if CONFIG_EARLY_PRINTK
940 trace_buffer_stop(p0,r0);
942 /* Turn caches off, to ensure we don't get double exceptions */
944 P4.L = LO(IMEM_CONTROL);
945 P4.H = HI(IMEM_CONTROL);
947 R5 = [P4]; /* Control Register*/
948 BITCLR(R5,ENICPLB_P);
950 SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */
955 P4.L = LO(DMEM_CONTROL);
956 P4.H = HI(DMEM_CONTROL);
958 BITCLR(R5,ENDCPLB_P);
959 SSYNC; /* SSYNC required before writing to DMEM_CONTROL. */
965 r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */
973 #endif /* CONFIG_EARLY_PRINTK */
976 * Put these in the kernel data section - that should always be covered by
977 * a CPLB. This is needed to ensure we don't get double fault conditions
980 #ifdef CONFIG_SYSCALL_TAB_L1
987 /* entry for each EXCAUSE[5:0]
988 * This table must be in sync with the table in ./kernel/traps.c
989 * EXCPT instruction can provide 4 bits of EXCAUSE, allowing 16 to be user defined
991 .long _ex_syscall /* 0x00 - User Defined - Linux Syscall */
992 .long _ex_soft_bp /* 0x01 - User Defined - Software breakpoint */
993 .long _ex_replaceable /* 0x02 - User Defined */
994 .long _ex_trap_c /* 0x03 - User Defined - userspace stack overflow */
995 .long _ex_trap_c /* 0x04 - User Defined - dump trace buffer */
996 .long _ex_replaceable /* 0x05 - User Defined */
997 .long _ex_replaceable /* 0x06 - User Defined */
998 .long _ex_replaceable /* 0x07 - User Defined */
999 .long _ex_replaceable /* 0x08 - User Defined */
1000 .long _ex_replaceable /* 0x09 - User Defined */
1001 .long _ex_replaceable /* 0x0A - User Defined */
1002 .long _ex_replaceable /* 0x0B - User Defined */
1003 .long _ex_replaceable /* 0x0C - User Defined */
1004 .long _ex_replaceable /* 0x0D - User Defined */
1005 .long _ex_replaceable /* 0x0E - User Defined */
1006 .long _ex_replaceable /* 0x0F - User Defined */
1007 .long _ex_single_step /* 0x10 - HW Single step */
1008 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
1009 .long _ex_trace_buff_full /* 0x11 - Trace Buffer Full */
1011 .long _ex_trap_c /* 0x11 - Trace Buffer Full */
1013 .long _ex_trap_c /* 0x12 - Reserved */
1014 .long _ex_trap_c /* 0x13 - Reserved */
1015 .long _ex_trap_c /* 0x14 - Reserved */
1016 .long _ex_trap_c /* 0x15 - Reserved */
1017 .long _ex_trap_c /* 0x16 - Reserved */
1018 .long _ex_trap_c /* 0x17 - Reserved */
1019 .long _ex_trap_c /* 0x18 - Reserved */
1020 .long _ex_trap_c /* 0x19 - Reserved */
1021 .long _ex_trap_c /* 0x1A - Reserved */
1022 .long _ex_trap_c /* 0x1B - Reserved */
1023 .long _ex_trap_c /* 0x1C - Reserved */
1024 .long _ex_trap_c /* 0x1D - Reserved */
1025 .long _ex_trap_c /* 0x1E - Reserved */
1026 .long _ex_trap_c /* 0x1F - Reserved */
1027 .long _ex_trap_c /* 0x20 - Reserved */
1028 .long _ex_trap_c /* 0x21 - Undefined Instruction */
1029 .long _ex_trap_c /* 0x22 - Illegal Instruction Combination */
1030 .long _ex_dviol /* 0x23 - Data CPLB Protection Violation */
1031 .long _ex_trap_c /* 0x24 - Data access misaligned */
1032 .long _ex_trap_c /* 0x25 - Unrecoverable Event */
1033 .long _ex_dmiss /* 0x26 - Data CPLB Miss */
1034 .long _ex_dmult /* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero */
1035 .long _ex_trap_c /* 0x28 - Emulation Watchpoint */
1036 .long _ex_trap_c /* 0x29 - Instruction fetch access error (535 only) */
1037 .long _ex_trap_c /* 0x2A - Instruction fetch misaligned */
1038 .long _ex_trap_c /* 0x2B - Instruction CPLB protection Violation */
1039 .long _ex_icplb_miss /* 0x2C - Instruction CPLB miss */
1040 .long _ex_trap_c /* 0x2D - Instruction CPLB Multiple Hits */
1041 .long _ex_trap_c /* 0x2E - Illegal use of Supervisor Resource */
1042 .long _ex_trap_c /* 0x2E - Illegal use of Supervisor Resource */
1043 .long _ex_trap_c /* 0x2F - Reserved */
1044 .long _ex_trap_c /* 0x30 - Reserved */
1045 .long _ex_trap_c /* 0x31 - Reserved */
1046 .long _ex_trap_c /* 0x32 - Reserved */
1047 .long _ex_trap_c /* 0x33 - Reserved */
1048 .long _ex_trap_c /* 0x34 - Reserved */
1049 .long _ex_trap_c /* 0x35 - Reserved */
1050 .long _ex_trap_c /* 0x36 - Reserved */
1051 .long _ex_trap_c /* 0x37 - Reserved */
1052 .long _ex_trap_c /* 0x38 - Reserved */
1053 .long _ex_trap_c /* 0x39 - Reserved */
1054 .long _ex_trap_c /* 0x3A - Reserved */
1055 .long _ex_trap_c /* 0x3B - Reserved */
1056 .long _ex_trap_c /* 0x3C - Reserved */
1057 .long _ex_trap_c /* 0x3D - Reserved */
1058 .long _ex_trap_c /* 0x3E - Reserved */
1059 .long _ex_trap_c /* 0x3F - Reserved */
1062 ENTRY(_sys_call_table)
1063 .long _sys_restart_syscall /* 0 */
1068 .long _sys_open /* 5 */
1070 .long _sys_ni_syscall /* old waitpid */
1073 .long _sys_unlink /* 10 */
1078 .long _sys_chmod /* 15 */
1079 .long _sys_chown /* chown16 */
1080 .long _sys_ni_syscall /* old break syscall holder */
1081 .long _sys_ni_syscall /* old stat */
1083 .long _sys_getpid /* 20 */
1085 .long _sys_ni_syscall /* old umount */
1088 .long _sys_stime /* 25 */
1091 .long _sys_ni_syscall /* old fstat */
1093 .long _sys_ni_syscall /* old utime */ /* 30 */
1094 .long _sys_ni_syscall /* old stty syscall holder */
1095 .long _sys_ni_syscall /* old gtty syscall holder */
1098 .long _sys_ni_syscall /* 35 */ /* old ftime syscall holder */
1103 .long _sys_rmdir /* 40 */
1107 .long _sys_ni_syscall /* old prof syscall holder */
1108 .long _sys_brk /* 45 */
1111 .long _sys_ni_syscall /* old sys_signal */
1112 .long _sys_geteuid /* geteuid16 */
1113 .long _sys_getegid /* getegid16 */ /* 50 */
1115 .long _sys_umount /* recycled never used phys() */
1116 .long _sys_ni_syscall /* old lock syscall holder */
1118 .long _sys_fcntl /* 55 */
1119 .long _sys_ni_syscall /* old mpx syscall holder */
1121 .long _sys_ni_syscall /* old ulimit syscall holder */
1122 .long _sys_ni_syscall /* old old uname */
1123 .long _sys_umask /* 60 */
1128 .long _sys_getpgrp /* 65 */
1130 .long _sys_ni_syscall /* old sys_sigaction */
1133 .long _sys_setreuid /* setreuid16 */ /* 70 */
1134 .long _sys_setregid /* setregid16 */
1135 .long _sys_ni_syscall /* old sys_sigsuspend */
1136 .long _sys_ni_syscall /* old sys_sigpending */
1137 .long _sys_sethostname
1138 .long _sys_setrlimit /* 75 */
1139 .long _sys_ni_syscall /* old getrlimit */
1140 .long _sys_getrusage
1141 .long _sys_gettimeofday
1142 .long _sys_settimeofday
1143 .long _sys_getgroups /* getgroups16 */ /* 80 */
1144 .long _sys_setgroups /* setgroups16 */
1145 .long _sys_ni_syscall /* old_select */
1147 .long _sys_ni_syscall /* old lstat */
1148 .long _sys_readlink /* 85 */
1150 .long _sys_ni_syscall /* sys_swapon */
1152 .long _sys_ni_syscall /* old_readdir */
1153 .long _sys_ni_syscall /* sys_mmap */ /* 90 */
1156 .long _sys_ftruncate
1158 .long _sys_fchown /* fchown16 */ /* 95 */
1159 .long _sys_getpriority
1160 .long _sys_setpriority
1161 .long _sys_ni_syscall /* old profil syscall holder */
1163 .long _sys_fstatfs /* 100 */
1164 .long _sys_ni_syscall
1165 .long _sys_ni_syscall /* old sys_socketcall */
1167 .long _sys_setitimer
1168 .long _sys_getitimer /* 105 */
1172 .long _sys_ni_syscall /* old uname */
1173 .long _sys_ni_syscall /* iopl for i386 */ /* 110 */
1175 .long _sys_ni_syscall /* obsolete idle() syscall */
1176 .long _sys_ni_syscall /* vm86old for i386 */
1178 .long _sys_ni_syscall /* 115 */ /* sys_swapoff */
1180 .long _sys_ni_syscall /* old sys_ipc */
1182 .long _sys_ni_syscall /* old sys_sigreturn */
1183 .long _sys_clone /* 120 */
1184 .long _sys_setdomainname
1186 .long _sys_ni_syscall /* old sys_modify_ldt */
1188 .long _sys_ni_syscall /* 125 */ /* sys_mprotect */
1189 .long _sys_ni_syscall /* old sys_sigprocmask */
1190 .long _sys_ni_syscall /* old "creat_module" */
1191 .long _sys_init_module
1192 .long _sys_delete_module
1193 .long _sys_ni_syscall /* 130: old "get_kernel_syms" */
1198 .long _sys_ni_syscall /* 135 */ /* sys_sysfs */
1199 .long _sys_personality
1200 .long _sys_ni_syscall /* for afs_syscall */
1201 .long _sys_setfsuid /* setfsuid16 */
1202 .long _sys_setfsgid /* setfsgid16 */
1203 .long _sys_llseek /* 140 */
1205 .long _sys_ni_syscall /* sys_select */
1207 .long _sys_ni_syscall /* sys_msync */
1208 .long _sys_readv /* 145 */
1211 .long _sys_fdatasync
1213 .long _sys_ni_syscall /* 150 */ /* sys_mlock */
1214 .long _sys_ni_syscall /* sys_munlock */
1215 .long _sys_ni_syscall /* sys_mlockall */
1216 .long _sys_ni_syscall /* sys_munlockall */
1217 .long _sys_sched_setparam
1218 .long _sys_sched_getparam /* 155 */
1219 .long _sys_sched_setscheduler
1220 .long _sys_sched_getscheduler
1221 .long _sys_sched_yield
1222 .long _sys_sched_get_priority_max
1223 .long _sys_sched_get_priority_min /* 160 */
1224 .long _sys_sched_rr_get_interval
1225 .long _sys_nanosleep
1227 .long _sys_setresuid /* setresuid16 */
1228 .long _sys_getresuid /* getresuid16 */ /* 165 */
1229 .long _sys_ni_syscall /* for vm86 */
1230 .long _sys_ni_syscall /* old "query_module" */
1231 .long _sys_ni_syscall /* sys_poll */
1232 .long _sys_nfsservctl
1233 .long _sys_setresgid /* setresgid16 */ /* 170 */
1234 .long _sys_getresgid /* getresgid16 */
1236 .long _sys_rt_sigreturn
1237 .long _sys_rt_sigaction
1238 .long _sys_rt_sigprocmask /* 175 */
1239 .long _sys_rt_sigpending
1240 .long _sys_rt_sigtimedwait
1241 .long _sys_rt_sigqueueinfo
1242 .long _sys_rt_sigsuspend
1243 .long _sys_pread64 /* 180 */
1245 .long _sys_lchown /* lchown16 */
1248 .long _sys_capset /* 185 */
1249 .long _sys_sigaltstack
1251 .long _sys_ni_syscall /* streams1 */
1252 .long _sys_ni_syscall /* streams2 */
1253 .long _sys_vfork /* 190 */
1254 .long _sys_getrlimit
1256 .long _sys_truncate64
1257 .long _sys_ftruncate64
1258 .long _sys_stat64 /* 195 */
1263 .long _sys_getgid /* 200 */
1268 .long _sys_getgroups /* 205 */
1269 .long _sys_setgroups
1271 .long _sys_setresuid
1272 .long _sys_getresuid
1273 .long _sys_setresgid /* 210 */
1274 .long _sys_getresgid
1278 .long _sys_setfsuid /* 215 */
1280 .long _sys_pivot_root
1281 .long _sys_ni_syscall /* sys_mincore */
1282 .long _sys_ni_syscall /* sys_madvise */
1283 .long _sys_getdents64 /* 220 */
1285 .long _sys_ni_syscall /* reserved for TUX */
1286 .long _sys_ni_syscall
1288 .long _sys_readahead /* 225 */
1290 .long _sys_lsetxattr
1291 .long _sys_fsetxattr
1293 .long _sys_lgetxattr /* 230 */
1294 .long _sys_fgetxattr
1295 .long _sys_listxattr
1296 .long _sys_llistxattr
1297 .long _sys_flistxattr
1298 .long _sys_removexattr /* 235 */
1299 .long _sys_lremovexattr
1300 .long _sys_fremovexattr
1302 .long _sys_sendfile64
1303 .long _sys_futex /* 240 */
1304 .long _sys_sched_setaffinity
1305 .long _sys_sched_getaffinity
1306 .long _sys_ni_syscall /* sys_set_thread_area */
1307 .long _sys_ni_syscall /* sys_get_thread_area */
1308 .long _sys_io_setup /* 245 */
1309 .long _sys_io_destroy
1310 .long _sys_io_getevents
1311 .long _sys_io_submit
1312 .long _sys_io_cancel
1313 .long _sys_ni_syscall /* 250 */ /* sys_alloc_hugepages */
1314 .long _sys_ni_syscall /* sys_freec_hugepages */
1315 .long _sys_exit_group
1316 .long _sys_lookup_dcookie
1317 .long _sys_bfin_spinlock
1318 .long _sys_epoll_create /* 255 */
1319 .long _sys_epoll_ctl
1320 .long _sys_epoll_wait
1321 .long _sys_ni_syscall /* remap_file_pages */
1322 .long _sys_set_tid_address
1323 .long _sys_timer_create /* 260 */
1324 .long _sys_timer_settime
1325 .long _sys_timer_gettime
1326 .long _sys_timer_getoverrun
1327 .long _sys_timer_delete
1328 .long _sys_clock_settime /* 265 */
1329 .long _sys_clock_gettime
1330 .long _sys_clock_getres
1331 .long _sys_clock_nanosleep
1333 .long _sys_fstatfs64 /* 270 */
1336 .long _sys_fadvise64_64
1337 .long _sys_ni_syscall /* vserver */
1338 .long _sys_ni_syscall /* 275, mbind */
1339 .long _sys_ni_syscall /* get_mempolicy */
1340 .long _sys_ni_syscall /* set_mempolicy */
1342 .long _sys_mq_unlink
1343 .long _sys_mq_timedsend /* 280 */
1344 .long _sys_mq_timedreceive
1345 .long _sys_mq_notify
1346 .long _sys_mq_getsetattr
1347 .long _sys_ni_syscall /* kexec_load */
1348 .long _sys_waitid /* 285 */
1350 .long _sys_request_key
1352 .long _sys_ioprio_set
1353 .long _sys_ioprio_get /* 290 */
1354 .long _sys_inotify_init
1355 .long _sys_inotify_add_watch
1356 .long _sys_inotify_rm_watch
1357 .long _sys_ni_syscall /* migrate_pages */
1358 .long _sys_openat /* 295 */
1362 .long _sys_futimesat
1363 .long _sys_fstatat64 /* 300 */
1367 .long _sys_symlinkat
1368 .long _sys_readlinkat /* 305 */
1370 .long _sys_faccessat
1373 .long _sys_unshare /* 310 */
1374 .long _sys_sram_alloc
1375 .long _sys_sram_free
1376 .long _sys_dma_memcpy
1378 .long _sys_bind /* 315 */
1380 .long _sys_getpeername
1381 .long _sys_getsockname
1382 .long _sys_getsockopt
1383 .long _sys_listen /* 320 */
1388 .long _sys_sendmsg /* 325 */
1390 .long _sys_setsockopt
1393 .long _sys_socketpair /* 330 */
1398 .long _sys_msgget /* 335 */
1403 .long _sys_shmdt /* 340 */
1406 .long _sys_sync_file_range
1408 .long _sys_vmsplice /* 345 */
1409 .long _sys_epoll_pwait
1410 .long _sys_utimensat
1412 .long _sys_timerfd_create
1413 .long _sys_eventfd /* 350 */
1416 .long _sys_fadvise64
1417 .long _sys_set_robust_list
1418 .long _sys_get_robust_list /* 355 */
1419 .long _sys_fallocate
1420 .long _sys_semtimedop
1421 .long _sys_timerfd_settime
1422 .long _sys_timerfd_gettime
1424 .rept NR_syscalls-(.-_sys_call_table)/4
1425 .long _sys_ni_syscall
1429 * Used to save the real RETX, IMASK and SYSCFG when temporarily
1430 * storing safe values across the transition from exception to IRQ5.
1441 _exception_stack_top:
1443 #if ANOMALY_05000261
1444 /* Used by the assembly entry point to work around an anomaly. */
1445 _last_cplb_fault_retx: