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.
37 #include <linux/linkage.h>
38 #include <linux/unistd.h>
39 #include <asm/blackfin.h>
40 #include <asm/errno.h>
41 #include <asm/thread_info.h> /* TIF_NEED_RESCHED */
42 #include <asm/asm-offsets.h>
43 #include <asm/trace.h>
45 #include <asm/mach-common/context.S>
47 #if defined(CONFIG_BFIN_SCRATCH_REG_RETN)
48 # define EX_SCRATCH_REG RETN
49 #elif defined(CONFIG_BFIN_SCRATCH_REG_RETE)
50 # define EX_SCRATCH_REG RETE
52 # define EX_SCRATCH_REG CYCLES
55 #ifdef CONFIG_EXCPT_IRQ_SYSC_L1
61 /* Slightly simplified and streamlined entry point for CPLB misses.
62 * This one does not lower the level to IRQ5, and thus can be used to
63 * patch up CPLB misses on the kernel stack.
68 * Work around an anomaly: if we see a new DCPLB fault, return
69 * without doing anything. Then, if we get the same fault again,
72 p5.l = _last_cplb_fault_retx;
73 p5.h = _last_cplb_fault_retx;
78 if !cc jump _return_from_exception;
88 DEBUG_START_HWTRACE(p5, r7)
95 DEBUG_START_HWTRACE(p5, r7)
98 raise 15; /* invoked by TRAP #0, for sys call */
110 ENTRY(_ex_single_step)
114 if cc jump _return_from_exception
123 if !cc jump _ex_trap_c;
126 r6.h = _exception_to_level5;
127 r6.l = _exception_to_level5;
130 if !cc jump _ex_trap_c;
132 ENTRY(_return_from_exception)
133 DEBUG_START_HWTRACE(p5, r7)
140 (R7:6,P5:4) = [sp++];
146 ENTRY(_handle_bad_cplb)
147 /* To get here, we just tried and failed to change a CPLB
148 * so, handle things in trap_c (C code), by lowering to
149 * IRQ5, just like we normally do. Since this is not a
150 * "normal" return path, we have a do alot of stuff to
151 * the stack to get ready so, we can fall through - we
152 * need to make a CPLB exception look like a normal exception
155 DEBUG_START_HWTRACE(p5, r7)
158 [--sp] = (R7:6, P5:4);
160 ENTRY(_ex_replaceable)
164 /* Make sure we are not in a double fault */
169 if CC jump _double_fault;
171 /* Call C code (trap_c) to handle the exception, which most
172 * likely involves sending a signal to the current process.
173 * To avoid double faults, lower our priority to IRQ5 first.
175 P5.h = _exception_to_level5;
176 P5.l = _exception_to_level5;
182 /* Disable all interrupts, but make sure level 5 is enabled so
183 * we can switch to that level. Save the old mask. */
185 p4.l = _excpt_saved_imask;
186 p4.h = _excpt_saved_imask;
191 /* Save the excause into a circular buffer, in case the instruction
192 * which caused this excecptions causes others.
194 P5.l = _in_ptr_excause;
195 P5.h = _in_ptr_excause;
201 R6.l = _excause_circ_buf;
202 R6.h = _excause_circ_buf;
208 DEBUG_START_HWTRACE(p5, r7)
209 (R7:6,P5:4) = [sp++];
216 /* We just realized we got an exception, while we were processing a different
217 * exception. This is a unrecoverable event, so crash
220 /* Turn caches & protection off, to ensure we don't get any more
224 P4.L = LO(IMEM_CONTROL);
225 P4.H = HI(IMEM_CONTROL);
227 R5 = [P4]; /* Control Register*/
228 BITCLR(R5,ENICPLB_P);
229 SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */
234 P4.L = LO(DMEM_CONTROL);
235 P4.H = HI(DMEM_CONTROL);
237 BITCLR(R5,ENDCPLB_P);
238 SSYNC; /* SSYNC required before writing to DMEM_CONTROL. */
243 /* Fix up the stack */
244 (R7:6,P5:4) = [sp++];
248 /* We should be out of the exception stack, and back down into
249 * kernel or user space stack
253 r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */
255 call _double_fault_c;
257 .L_double_fault_panic:
258 JUMP .L_double_fault_panic
260 ENDPROC(_double_fault)
262 ENTRY(_exception_to_level5)
265 /* Restore interrupt mask. We haven't pushed RETI, so this
266 * doesn't enable interrupts until we return from this handler. */
267 p4.l = _excpt_saved_imask;
268 p4.h = _excpt_saved_imask;
272 /* Restore the hardware error vector. */
283 r0 = [p2]; /* Read current IPEND */
284 [sp + PT_IPEND] = r0; /* Store IPEND */
286 /* Pop the excause from the circular buffer and push it on the stack
287 * (in the right place - if you change the location of SEQSTAT, you
288 * must change this offset.
291 P5.l = _out_ptr_excause;
292 P5.h = _out_ptr_excause;
298 R6.l = _excause_circ_buf;
299 R6.h = _excause_circ_buf;
305 r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */
310 /* See if anything else is in the exception buffer
311 * if there is, process it
313 P5.l = _out_ptr_excause;
314 P5.h = _out_ptr_excause;
315 P4.l = _in_ptr_excause;
316 P4.h = _in_ptr_excause;
320 if ! CC JUMP .L_excep_to_5_again
322 call _ret_from_exception;
325 ENDPROC(_exception_to_level5)
327 ENTRY(_trap) /* Exception: 4th entry into system event table(supervisor mode)*/
328 /* Since the kernel stack can be anywhere, it's not guaranteed to be
329 * covered by a CPLB. Switch to an exception stack; use RETN as a
330 * scratch register (for want of a better option).
333 sp.l = _exception_stack_top;
334 sp.h = _exception_stack_top;
335 /* Try to deal with syscalls quickly. */
337 [--sp] = (R7:6, P5:4);
338 DEBUG_STOP_HWTRACE(p5, r7)
339 r7 = SEQSTAT; /* reason code is in bit 5:0 */
340 r6.l = lo(SEQSTAT_EXCAUSE);
341 r6.h = hi(SEQSTAT_EXCAUSE);
351 r7 = -ENOSYS; /* signextending enough */
352 [sp + PT_R0] = r7; /* return value from system call */
353 jump .Lsyscall_really_exit;
356 ENTRY(_kernel_execve)
359 r3 = SIZEOF_PTREGS / 4;
374 /* Success. Copy our temporary pt_regs to the top of the kernel
375 * stack and do a normal exception return.
378 r0 = (-KERNEL_STACK_SIZE) (x);
382 r0 = KERNEL_STACK_SIZE - 4 (z);
388 r3 = SIZEOF_PTREGS / 4;
394 if ! cc jump 0b (bp);
396 r0 = (KERNEL_STACK_SIZE - SIZEOF_PTREGS) (z);
401 [SP + PT_SYSCFG] = r0;
402 [p3 + (TASK_THREAD + THREAD_KSP)] = sp;
409 ENDPROC(_kernel_execve)
417 [sp + PT_IPEND] = r0;
419 /* Store RETS for now */
421 [sp + PT_RESERVED] = r0;
422 /* Set the stack for the current process */
424 r6.l = lo(ALIGN_PAGE_MASK);
425 r6.h = hi(ALIGN_PAGE_MASK);
426 r7 = r7 & r6; /* thread_info */
430 [p2+(TASK_THREAD+THREAD_KSP)] = sp;
432 /* Check the System Call */
434 /* System call number is passed in P0 */
437 if ! cc jump .Lbadsys;
439 /* are we tracing syscalls?*/
441 r6.l = lo(ALIGN_PAGE_MASK);
442 r6.h = hi(ALIGN_PAGE_MASK);
446 CC = BITTST(r7,TIF_SYSCALL_TRACE);
447 if CC JUMP _sys_trace;
449 /* Execute the appropriate system call */
452 p5.l = _sys_call_table;
453 p5.h = _sys_call_table;
470 r4.l = lo(ALIGN_PAGE_MASK);
471 r4.h = hi(ALIGN_PAGE_MASK);
472 r7 = r7 & r4; /* thread_info->flags */
474 .Lresume_userspace_1:
475 /* Disable interrupts. */
479 r7 = [p5 + TI_FLAGS];
480 r4.l = lo(_TIF_WORK_MASK);
481 r4.h = hi(_TIF_WORK_MASK);
485 cc = BITTST(r7, TIF_NEED_RESCHED);
486 if !cc jump .Lsyscall_sigpending;
488 /* Reenable interrupts. */
496 jump .Lresume_userspace_1;
498 .Lsyscall_sigpending:
499 cc = BITTST(r7, TIF_RESTORE_SIGMASK);
500 if cc jump .Lsyscall_do_signals;
501 cc = BITTST(r7, TIF_SIGPENDING);
502 if !cc jump .Lsyscall_really_exit;
503 .Lsyscall_do_signals:
504 /* Reenable interrupts. */
513 .Lsyscall_really_exit:
514 r5 = [sp + PT_RESERVED];
517 ENDPROC(_system_call)
522 /* Execute the appropriate system call */
525 p5.l = _sys_call_table;
526 p5.h = _sys_call_table;
545 jump .Lresume_userspace;
550 * Beware - when entering resume, prev (the current task) is
551 * in r0, next (the new task) is in r1.
557 [--sp] = (r7:4, p5:3);
561 [p0+(TASK_THREAD+THREAD_USP)] = p2;
563 /* save current kernel stack pointer */
564 [p0+(TASK_THREAD+THREAD_KSP)] = sp;
566 /* save program counter */
567 r1.l = _new_old_task;
568 r1.h = _new_old_task;
569 [p0+(TASK_THREAD+THREAD_PC)] = r1;
571 /* restore the kernel stack pointer */
572 sp = [p1+(TASK_THREAD+THREAD_KSP)];
574 /* restore user stack pointer */
575 p0 = [p1+(TASK_THREAD+THREAD_USP)];
579 p0 = [p1+(TASK_THREAD+THREAD_PC)];
583 * Following code actually lands up in a new (old) task.
587 (r7:4, p5:3) = [sp++];
592 * When we come out of resume, r0 carries "old" task, becuase we are
598 ENTRY(_ret_from_exception)
604 [sp + PT_IPEND] = r0;
612 if !cc jump 4f; /* if not return to user mode, get out */
614 /* Make sure any pending system call or deferred exception
615 * return in ILAT for this process to get executed, otherwise
616 * in case context switch happens, system call of
617 * first process (i.e in ILAT) will be carried
618 * forward to the switched process
624 r1 = (EVT_IVG14 | EVT_IVG15) (z);
629 /* Set the stack for the current process */
631 r4.l = lo(ALIGN_PAGE_MASK);
632 r4.h = hi(ALIGN_PAGE_MASK);
633 r7 = r7 & r4; /* thread_info->flags */
635 r7 = [p5 + TI_FLAGS];
636 r4.l = lo(_TIF_WORK_MASK);
637 r4.h = hi(_TIF_WORK_MASK);
644 p1.l = _schedule_and_signal;
645 p1.h = _schedule_and_signal;
648 raise 15; /* raise evt14 to do signal or reschedule */
655 ENDPROC(_ret_from_exception)
657 ENTRY(_return_from_int)
658 /* If someone else already raised IRQ 15, do nothing. */
663 cc = bittst (r0, EVT_IVG15_P);
666 /* if not return to user mode, get out */
680 /* Lower the interrupt level to 15. */
683 p1.l = _schedule_and_signal_from_int;
684 p1.h = _schedule_and_signal_from_int;
688 r0.l = lo(CONFIG_BOOT_LOAD);
689 r0.h = hi(CONFIG_BOOT_LOAD);
694 raise 15; /* raise evt15 to do signal or reschedule */
698 ENDPROC(_return_from_int)
700 ENTRY(_lower_to_irq14)
702 r0.l = lo(CONFIG_BOOT_LOAD);
703 r0.h = hi(CONFIG_BOOT_LOAD);
710 ENTRY(_evt14_softirq)
711 #ifdef CONFIG_DEBUG_HWERR
721 _schedule_and_signal_from_int:
722 /* To end up here, vector 15 was changed - so we have to change it
727 p1.l = _evt_system_call;
728 p1.h = _evt_system_call;
732 /* Set orig_p0 to -1 to indicate this isn't the end of a syscall. */
734 [sp + PT_ORIG_P0] = r0;
737 [sp + PT_RESERVED] = p1;
746 call _finish_atomic_sections;
748 jump.s .Lresume_userspace;
750 _schedule_and_signal:
752 /* To end up here, vector 15 was changed - so we have to change it
757 p1.l = _evt_system_call;
758 p1.h = _evt_system_call;
763 [sp + PT_RESERVED] = P0;
764 call .Lresume_userspace;
768 ENDPROC(_lower_to_irq14)
770 /* Make sure when we start, that the circular buffer is initialized properly
771 * R0 and P0 are call clobbered, so we can use them here.
773 ENTRY(_init_exception_buff)
775 p0.h = _in_ptr_excause;
776 p0.l = _in_ptr_excause;
778 p0.h = _out_ptr_excause;
779 p0.l = _out_ptr_excause;
782 ENDPROC(_init_exception_buff)
784 /* We handle this 100% in exception space - to reduce overhead
785 * Only potiential problem is if the software buffer gets swapped out of the
786 * CPLB table - then double fault. - so we don't let this happen in other places
788 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
789 ENTRY(_ex_trace_buff_full)
795 P5.L = _trace_buff_offset;
796 P5.H = _trace_buff_offset;
797 P3 = [P5]; /* trace_buff_offset */
801 R7 <<= 1; /* double, since we need to read twice */
803 R7 <<= 2; /* need to shift over again,
804 * to get the number of bytes */
807 R6 = ((1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN)*1024) - 1;
814 P2.L = _trace_buff_offset;
815 P2.H = _trace_buff_offset;
818 P2.L = _software_trace_buff;
819 P2.H = _software_trace_buff;
821 LSETUP (.Lstart, .Lend) LC0;
823 R7 = [P5]; /* read TBUF */
837 jump _return_from_exception;
838 ENDPROC(_ex_trace_buff_full)
840 #if CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN == 4
844 #endif /* CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN */
845 ENTRY(_trace_buff_offset)
848 ENTRY(_software_trace_buff)
849 .rept ((1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN)*256);
852 #endif /* CONFIG_DEBUG_BFIN_HWTRACE_EXPAND */
854 #if CONFIG_EARLY_PRINTK
858 trace_buffer_stop(p0,r0);
860 /* Turn caches off, to ensure we don't get double exceptions */
862 P4.L = LO(IMEM_CONTROL);
863 P4.H = HI(IMEM_CONTROL);
865 R5 = [P4]; /* Control Register*/
866 BITCLR(R5,ENICPLB_P);
868 SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */
873 P4.L = LO(DMEM_CONTROL);
874 P4.H = HI(DMEM_CONTROL);
876 BITCLR(R5,ENDCPLB_P);
877 SSYNC; /* SSYNC required before writing to DMEM_CONTROL. */
883 r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */
890 #endif /* CONFIG_EARLY_PRINTK */
893 * Put these in the kernel data section - that should always be covered by
894 * a CPLB. This is needed to ensure we don't get double fault conditions
897 #ifdef CONFIG_SYSCALL_TAB_L1
903 /* entry for each EXCAUSE[5:0]
904 * This table must be in sync with the table in ./kernel/traps.c
905 * EXCPT instruction can provide 4 bits of EXCAUSE, allowing 16 to be user defined
907 .long _ex_syscall /* 0x00 - User Defined - Linux Syscall */
908 .long _ex_soft_bp /* 0x01 - User Defined - Software breakpoint */
909 .long _ex_replaceable /* 0x02 - User Defined */
910 .long _ex_trap_c /* 0x03 - User Defined - userspace stack overflow */
911 .long _ex_replaceable /* 0x04 - User Defined */
912 .long _ex_replaceable /* 0x05 - User Defined */
913 .long _ex_replaceable /* 0x06 - User Defined */
914 .long _ex_replaceable /* 0x07 - User Defined */
915 .long _ex_replaceable /* 0x08 - User Defined */
916 .long _ex_replaceable /* 0x09 - User Defined */
917 .long _ex_replaceable /* 0x0A - User Defined */
918 .long _ex_replaceable /* 0x0B - User Defined */
919 .long _ex_replaceable /* 0x0C - User Defined */
920 .long _ex_replaceable /* 0x0D - User Defined */
921 .long _ex_replaceable /* 0x0E - User Defined */
922 .long _ex_replaceable /* 0x0F - User Defined */
923 .long _ex_single_step /* 0x10 - HW Single step */
924 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
925 .long _ex_trace_buff_full /* 0x11 - Trace Buffer Full */
927 .long _ex_trap_c /* 0x11 - Trace Buffer Full */
929 .long _ex_trap_c /* 0x12 - Reserved */
930 .long _ex_trap_c /* 0x13 - Reserved */
931 .long _ex_trap_c /* 0x14 - Reserved */
932 .long _ex_trap_c /* 0x15 - Reserved */
933 .long _ex_trap_c /* 0x16 - Reserved */
934 .long _ex_trap_c /* 0x17 - Reserved */
935 .long _ex_trap_c /* 0x18 - Reserved */
936 .long _ex_trap_c /* 0x19 - Reserved */
937 .long _ex_trap_c /* 0x1A - Reserved */
938 .long _ex_trap_c /* 0x1B - Reserved */
939 .long _ex_trap_c /* 0x1C - Reserved */
940 .long _ex_trap_c /* 0x1D - Reserved */
941 .long _ex_trap_c /* 0x1E - Reserved */
942 .long _ex_trap_c /* 0x1F - Reserved */
943 .long _ex_trap_c /* 0x20 - Reserved */
944 .long _ex_trap_c /* 0x21 - Undefined Instruction */
945 .long _ex_trap_c /* 0x22 - Illegal Instruction Combination */
946 .long _ex_dcplb /* 0x23 - Data CPLB Protection Violation */
947 .long _ex_trap_c /* 0x24 - Data access misaligned */
948 .long _ex_trap_c /* 0x25 - Unrecoverable Event */
949 .long _ex_dcplb /* 0x26 - Data CPLB Miss */
950 .long _ex_trap_c /* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero */
951 .long _ex_trap_c /* 0x28 - Emulation Watchpoint */
952 .long _ex_trap_c /* 0x29 - Instruction fetch access error (535 only) */
953 .long _ex_trap_c /* 0x2A - Instruction fetch misaligned */
954 .long _ex_icplb /* 0x2B - Instruction CPLB protection Violation */
955 .long _ex_icplb /* 0x2C - Instruction CPLB miss */
956 .long _ex_trap_c /* 0x2D - Instruction CPLB Multiple Hits */
957 .long _ex_trap_c /* 0x2E - Illegal use of Supervisor Resource */
958 .long _ex_trap_c /* 0x2E - Illegal use of Supervisor Resource */
959 .long _ex_trap_c /* 0x2F - Reserved */
960 .long _ex_trap_c /* 0x30 - Reserved */
961 .long _ex_trap_c /* 0x31 - Reserved */
962 .long _ex_trap_c /* 0x32 - Reserved */
963 .long _ex_trap_c /* 0x33 - Reserved */
964 .long _ex_trap_c /* 0x34 - Reserved */
965 .long _ex_trap_c /* 0x35 - Reserved */
966 .long _ex_trap_c /* 0x36 - Reserved */
967 .long _ex_trap_c /* 0x37 - Reserved */
968 .long _ex_trap_c /* 0x38 - Reserved */
969 .long _ex_trap_c /* 0x39 - Reserved */
970 .long _ex_trap_c /* 0x3A - Reserved */
971 .long _ex_trap_c /* 0x3B - Reserved */
972 .long _ex_trap_c /* 0x3C - Reserved */
973 .long _ex_trap_c /* 0x3D - Reserved */
974 .long _ex_trap_c /* 0x3E - Reserved */
975 .long _ex_trap_c /* 0x3F - Reserved */
978 ENTRY(_sys_call_table)
979 .long _sys_restart_syscall /* 0 */
984 .long _sys_open /* 5 */
986 .long _sys_ni_syscall /* old waitpid */
989 .long _sys_unlink /* 10 */
994 .long _sys_chmod /* 15 */
995 .long _sys_chown /* chown16 */
996 .long _sys_ni_syscall /* old break syscall holder */
997 .long _sys_ni_syscall /* old stat */
999 .long _sys_getpid /* 20 */
1001 .long _sys_ni_syscall /* old umount */
1004 .long _sys_stime /* 25 */
1007 .long _sys_ni_syscall /* old fstat */
1009 .long _sys_ni_syscall /* old utime */ /* 30 */
1010 .long _sys_ni_syscall /* old stty syscall holder */
1011 .long _sys_ni_syscall /* old gtty syscall holder */
1014 .long _sys_ni_syscall /* 35 */ /* old ftime syscall holder */
1019 .long _sys_rmdir /* 40 */
1023 .long _sys_ni_syscall /* old prof syscall holder */
1024 .long _sys_brk /* 45 */
1027 .long _sys_ni_syscall /* old sys_signal */
1028 .long _sys_geteuid /* geteuid16 */
1029 .long _sys_getegid /* getegid16 */ /* 50 */
1031 .long _sys_umount /* recycled never used phys() */
1032 .long _sys_ni_syscall /* old lock syscall holder */
1034 .long _sys_fcntl /* 55 */
1035 .long _sys_ni_syscall /* old mpx syscall holder */
1037 .long _sys_ni_syscall /* old ulimit syscall holder */
1038 .long _sys_ni_syscall /* old old uname */
1039 .long _sys_umask /* 60 */
1044 .long _sys_getpgrp /* 65 */
1046 .long _sys_ni_syscall /* old sys_sigaction */
1049 .long _sys_setreuid /* setreuid16 */ /* 70 */
1050 .long _sys_setregid /* setregid16 */
1051 .long _sys_ni_syscall /* old sys_sigsuspend */
1052 .long _sys_ni_syscall /* old sys_sigpending */
1053 .long _sys_sethostname
1054 .long _sys_setrlimit /* 75 */
1055 .long _sys_ni_syscall /* old getrlimit */
1056 .long _sys_getrusage
1057 .long _sys_gettimeofday
1058 .long _sys_settimeofday
1059 .long _sys_getgroups /* getgroups16 */ /* 80 */
1060 .long _sys_setgroups /* setgroups16 */
1061 .long _sys_ni_syscall /* old_select */
1063 .long _sys_ni_syscall /* old lstat */
1064 .long _sys_readlink /* 85 */
1066 .long _sys_ni_syscall /* sys_swapon */
1068 .long _sys_ni_syscall /* old_readdir */
1069 .long _sys_ni_syscall /* sys_mmap */ /* 90 */
1072 .long _sys_ftruncate
1074 .long _sys_fchown /* fchown16 */ /* 95 */
1075 .long _sys_getpriority
1076 .long _sys_setpriority
1077 .long _sys_ni_syscall /* old profil syscall holder */
1079 .long _sys_fstatfs /* 100 */
1080 .long _sys_ni_syscall
1081 .long _sys_ni_syscall /* old sys_socketcall */
1083 .long _sys_setitimer
1084 .long _sys_getitimer /* 105 */
1088 .long _sys_ni_syscall /* old uname */
1089 .long _sys_ni_syscall /* iopl for i386 */ /* 110 */
1091 .long _sys_ni_syscall /* obsolete idle() syscall */
1092 .long _sys_ni_syscall /* vm86old for i386 */
1094 .long _sys_ni_syscall /* 115 */ /* sys_swapoff */
1096 .long _sys_ni_syscall /* old sys_ipc */
1098 .long _sys_ni_syscall /* old sys_sigreturn */
1099 .long _sys_clone /* 120 */
1100 .long _sys_setdomainname
1102 .long _sys_ni_syscall /* old sys_modify_ldt */
1104 .long _sys_ni_syscall /* 125 */ /* sys_mprotect */
1105 .long _sys_ni_syscall /* old sys_sigprocmask */
1106 .long _sys_ni_syscall /* old "creat_module" */
1107 .long _sys_init_module
1108 .long _sys_delete_module
1109 .long _sys_ni_syscall /* 130: old "get_kernel_syms" */
1114 .long _sys_ni_syscall /* 135 */ /* sys_sysfs */
1115 .long _sys_personality
1116 .long _sys_ni_syscall /* for afs_syscall */
1117 .long _sys_setfsuid /* setfsuid16 */
1118 .long _sys_setfsgid /* setfsgid16 */
1119 .long _sys_llseek /* 140 */
1121 .long _sys_ni_syscall /* sys_select */
1123 .long _sys_ni_syscall /* sys_msync */
1124 .long _sys_readv /* 145 */
1127 .long _sys_fdatasync
1129 .long _sys_ni_syscall /* 150 */ /* sys_mlock */
1130 .long _sys_ni_syscall /* sys_munlock */
1131 .long _sys_ni_syscall /* sys_mlockall */
1132 .long _sys_ni_syscall /* sys_munlockall */
1133 .long _sys_sched_setparam
1134 .long _sys_sched_getparam /* 155 */
1135 .long _sys_sched_setscheduler
1136 .long _sys_sched_getscheduler
1137 .long _sys_sched_yield
1138 .long _sys_sched_get_priority_max
1139 .long _sys_sched_get_priority_min /* 160 */
1140 .long _sys_sched_rr_get_interval
1141 .long _sys_nanosleep
1143 .long _sys_setresuid /* setresuid16 */
1144 .long _sys_getresuid /* getresuid16 */ /* 165 */
1145 .long _sys_ni_syscall /* for vm86 */
1146 .long _sys_ni_syscall /* old "query_module" */
1147 .long _sys_ni_syscall /* sys_poll */
1148 .long _sys_nfsservctl
1149 .long _sys_setresgid /* setresgid16 */ /* 170 */
1150 .long _sys_getresgid /* getresgid16 */
1152 .long _sys_rt_sigreturn
1153 .long _sys_rt_sigaction
1154 .long _sys_rt_sigprocmask /* 175 */
1155 .long _sys_rt_sigpending
1156 .long _sys_rt_sigtimedwait
1157 .long _sys_rt_sigqueueinfo
1158 .long _sys_rt_sigsuspend
1159 .long _sys_pread64 /* 180 */
1161 .long _sys_lchown /* lchown16 */
1164 .long _sys_capset /* 185 */
1165 .long _sys_sigaltstack
1167 .long _sys_ni_syscall /* streams1 */
1168 .long _sys_ni_syscall /* streams2 */
1169 .long _sys_vfork /* 190 */
1170 .long _sys_getrlimit
1172 .long _sys_truncate64
1173 .long _sys_ftruncate64
1174 .long _sys_stat64 /* 195 */
1179 .long _sys_getgid /* 200 */
1184 .long _sys_getgroups /* 205 */
1185 .long _sys_setgroups
1187 .long _sys_setresuid
1188 .long _sys_getresuid
1189 .long _sys_setresgid /* 210 */
1190 .long _sys_getresgid
1194 .long _sys_setfsuid /* 215 */
1196 .long _sys_pivot_root
1197 .long _sys_ni_syscall /* sys_mincore */
1198 .long _sys_ni_syscall /* sys_madvise */
1199 .long _sys_getdents64 /* 220 */
1201 .long _sys_ni_syscall /* reserved for TUX */
1202 .long _sys_ni_syscall
1204 .long _sys_readahead /* 225 */
1206 .long _sys_lsetxattr
1207 .long _sys_fsetxattr
1209 .long _sys_lgetxattr /* 230 */
1210 .long _sys_fgetxattr
1211 .long _sys_listxattr
1212 .long _sys_llistxattr
1213 .long _sys_flistxattr
1214 .long _sys_removexattr /* 235 */
1215 .long _sys_lremovexattr
1216 .long _sys_fremovexattr
1218 .long _sys_sendfile64
1219 .long _sys_futex /* 240 */
1220 .long _sys_sched_setaffinity
1221 .long _sys_sched_getaffinity
1222 .long _sys_ni_syscall /* sys_set_thread_area */
1223 .long _sys_ni_syscall /* sys_get_thread_area */
1224 .long _sys_io_setup /* 245 */
1225 .long _sys_io_destroy
1226 .long _sys_io_getevents
1227 .long _sys_io_submit
1228 .long _sys_io_cancel
1229 .long _sys_ni_syscall /* 250 */ /* sys_alloc_hugepages */
1230 .long _sys_ni_syscall /* sys_freec_hugepages */
1231 .long _sys_exit_group
1232 .long _sys_lookup_dcookie
1233 .long _sys_bfin_spinlock
1234 .long _sys_epoll_create /* 255 */
1235 .long _sys_epoll_ctl
1236 .long _sys_epoll_wait
1237 .long _sys_ni_syscall /* remap_file_pages */
1238 .long _sys_set_tid_address
1239 .long _sys_timer_create /* 260 */
1240 .long _sys_timer_settime
1241 .long _sys_timer_gettime
1242 .long _sys_timer_getoverrun
1243 .long _sys_timer_delete
1244 .long _sys_clock_settime /* 265 */
1245 .long _sys_clock_gettime
1246 .long _sys_clock_getres
1247 .long _sys_clock_nanosleep
1249 .long _sys_fstatfs64 /* 270 */
1252 .long _sys_fadvise64_64
1253 .long _sys_ni_syscall /* vserver */
1254 .long _sys_ni_syscall /* 275, mbind */
1255 .long _sys_ni_syscall /* get_mempolicy */
1256 .long _sys_ni_syscall /* set_mempolicy */
1258 .long _sys_mq_unlink
1259 .long _sys_mq_timedsend /* 280 */
1260 .long _sys_mq_timedreceive
1261 .long _sys_mq_notify
1262 .long _sys_mq_getsetattr
1263 .long _sys_ni_syscall /* kexec_load */
1264 .long _sys_waitid /* 285 */
1266 .long _sys_request_key
1268 .long _sys_ioprio_set
1269 .long _sys_ioprio_get /* 290 */
1270 .long _sys_inotify_init
1271 .long _sys_inotify_add_watch
1272 .long _sys_inotify_rm_watch
1273 .long _sys_ni_syscall /* migrate_pages */
1274 .long _sys_openat /* 295 */
1278 .long _sys_futimesat
1279 .long _sys_fstatat64 /* 300 */
1283 .long _sys_symlinkat
1284 .long _sys_readlinkat /* 305 */
1286 .long _sys_faccessat
1289 .long _sys_unshare /* 310 */
1290 .long _sys_sram_alloc
1291 .long _sys_sram_free
1292 .long _sys_dma_memcpy
1294 .long _sys_bind /* 315 */
1296 .long _sys_getpeername
1297 .long _sys_getsockname
1298 .long _sys_getsockopt
1299 .long _sys_listen /* 320 */
1304 .long _sys_sendmsg /* 325 */
1306 .long _sys_setsockopt
1309 .long _sys_socketpair /* 330 */
1314 .long _sys_msgget /* 335 */
1319 .long _sys_shmdt /* 340 */
1322 .long _sys_sync_file_range
1324 .long _sys_vmsplice /* 345 */
1325 .long _sys_epoll_pwait
1326 .long _sys_utimensat
1329 .long _sys_eventfd /* 350 */
1332 .long _sys_fadvise64
1333 .long _sys_set_robust_list
1334 .long _sys_get_robust_list /* 355 */
1335 .long _sys_fallocate
1336 .rept NR_syscalls-(.-_sys_call_table)/4
1337 .long _sys_ni_syscall
1346 _exception_stack_top:
1348 #if ANOMALY_05000261
1349 /* Used by the assembly entry point to work around an anomaly. */
1350 _last_cplb_fault_retx:
1354 * Single instructions can have multiple faults, which need to be
1355 * handled by traps.c, in irq5. We store the exception cause to ensure
1356 * we don't miss a double fault condition
1358 ENTRY(_in_ptr_excause)
1360 ENTRY(_out_ptr_excause)
1363 ENTRY(_excause_circ_buf)