| /* |
| * Contains the system-call and fault low-level handling routines. |
| * This also contains the timer-interrupt handler, as well as all |
| * interrupts and faults that can result in a task-switch. |
| * |
| * Copyright 2005-2009 Analog Devices Inc. |
| * |
| * Licensed under the GPL-2 or later. |
| */ |
| |
| /* NOTE: This code handles signal-recognition, which happens every time |
| * after a timer-interrupt and after each system call. |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/linkage.h> |
| #include <linux/unistd.h> |
| #include <asm/blackfin.h> |
| #include <asm/errno.h> |
| #include <asm/fixed_code.h> |
| #include <asm/thread_info.h> /* TIF_NEED_RESCHED */ |
| #include <asm/asm-offsets.h> |
| #include <asm/trace.h> |
| #include <asm/traps.h> |
| |
| #include <asm/context.S> |
| |
| #if defined(CONFIG_BFIN_SCRATCH_REG_RETN) |
| # define EX_SCRATCH_REG RETN |
| #elif defined(CONFIG_BFIN_SCRATCH_REG_RETE) |
| # define EX_SCRATCH_REG RETE |
| #else |
| # define EX_SCRATCH_REG CYCLES |
| #endif |
| |
| #ifdef CONFIG_EXCPT_IRQ_SYSC_L1 |
| .section .l1.text |
| #else |
| .text |
| #endif |
| |
| /* Slightly simplified and streamlined entry point for CPLB misses. |
| * This one does not lower the level to IRQ5, and thus can be used to |
| * patch up CPLB misses on the kernel stack. |
| */ |
| #if ANOMALY_05000261 |
| #define _ex_dviol _ex_workaround_261 |
| #define _ex_dmiss _ex_workaround_261 |
| #define _ex_dmult _ex_workaround_261 |
| |
| ENTRY(_ex_workaround_261) |
| /* |
| * Work around an anomaly: if we see a new DCPLB fault, return |
| * without doing anything. Then, if we get the same fault again, |
| * handle it. |
| */ |
| P4 = R7; /* Store EXCAUSE */ |
| |
| GET_PDA(p5, r7); |
| r7 = [p5 + PDA_LFRETX]; |
| r6 = retx; |
| [p5 + PDA_LFRETX] = r6; |
| cc = r6 == r7; |
| if !cc jump _bfin_return_from_exception; |
| /* fall through */ |
| R7 = P4; |
| R6 = VEC_CPLB_M; /* Data CPLB Miss */ |
| cc = R6 == R7; |
| if cc jump _ex_dcplb_miss (BP); |
| #ifdef CONFIG_MPU |
| R6 = VEC_CPLB_VL; /* Data CPLB Violation */ |
| cc = R6 == R7; |
| if cc jump _ex_dcplb_viol (BP); |
| #endif |
| /* Handle Data CPLB Protection Violation |
| * and Data CPLB Multiple Hits - Linux Trap Zero |
| */ |
| jump _ex_trap_c; |
| ENDPROC(_ex_workaround_261) |
| |
| #else |
| #ifdef CONFIG_MPU |
| #define _ex_dviol _ex_dcplb_viol |
| #else |
| #define _ex_dviol _ex_trap_c |
| #endif |
| #define _ex_dmiss _ex_dcplb_miss |
| #define _ex_dmult _ex_trap_c |
| #endif |
| |
| |
| ENTRY(_ex_dcplb_viol) |
| ENTRY(_ex_dcplb_miss) |
| ENTRY(_ex_icplb_miss) |
| (R7:6,P5:4) = [sp++]; |
| /* We leave the previously pushed ASTAT on the stack. */ |
| SAVE_CONTEXT_CPLB |
| |
| /* We must load R1 here, _before_ DEBUG_HWTRACE_SAVE, since that |
| * will change the stack pointer. */ |
| R0 = SEQSTAT; |
| R1 = SP; |
| |
| DEBUG_HWTRACE_SAVE(p5, r7) |
| |
| sp += -12; |
| call _cplb_hdr; |
| sp += 12; |
| CC = R0 == 0; |
| IF !CC JUMP _handle_bad_cplb; |
| |
| #ifdef CONFIG_DEBUG_DOUBLEFAULT |
| /* While we were processing this, did we double fault? */ |
| r7 = SEQSTAT; /* reason code is in bit 5:0 */ |
| r6.l = lo(SEQSTAT_EXCAUSE); |
| r6.h = hi(SEQSTAT_EXCAUSE); |
| r7 = r7 & r6; |
| r6 = 0x25; |
| CC = R7 == R6; |
| if CC JUMP _double_fault; |
| #endif |
| |
| DEBUG_HWTRACE_RESTORE(p5, r7) |
| RESTORE_CONTEXT_CPLB |
| ASTAT = [SP++]; |
| SP = EX_SCRATCH_REG; |
| rtx; |
| ENDPROC(_ex_icplb_miss) |
| |
| ENTRY(_ex_syscall) |
| raise 15; /* invoked by TRAP #0, for sys call */ |
| jump.s _bfin_return_from_exception; |
| ENDPROC(_ex_syscall) |
| |
| ENTRY(_ex_single_step) |
| /* If we just returned from an interrupt, the single step event is |
| for the RTI instruction. */ |
| r7 = retx; |
| r6 = reti; |
| cc = r7 == r6; |
| if cc jump _bfin_return_from_exception; |
| |
| #ifdef CONFIG_KGDB |
| /* Don't do single step in hardware exception handler */ |
| p5.l = lo(IPEND); |
| p5.h = hi(IPEND); |
| r6 = [p5]; |
| cc = bittst(r6, 4); |
| if cc jump _bfin_return_from_exception; |
| cc = bittst(r6, 5); |
| if cc jump _bfin_return_from_exception; |
| |
| /* skip single step if current interrupt priority is higher than |
| * that of the first instruction, from which gdb starts single step */ |
| r6 >>= 6; |
| r7 = 10; |
| .Lfind_priority_start: |
| cc = bittst(r6, 0); |
| if cc jump .Lfind_priority_done; |
| r6 >>= 1; |
| r7 += -1; |
| cc = r7 == 0; |
| if cc jump .Lfind_priority_done; |
| jump.s .Lfind_priority_start; |
| .Lfind_priority_done: |
| p4.l = _kgdb_single_step; |
| p4.h = _kgdb_single_step; |
| r6 = [p4]; |
| cc = r6 == 0; |
| if cc jump .Ldo_single_step; |
| r6 += -1; |
| cc = r6 < r7; |
| if cc jump 1f; |
| .Ldo_single_step: |
| #else |
| /* If we were in user mode, do the single step normally. */ |
| p5.l = lo(IPEND); |
| p5.h = hi(IPEND); |
| r6 = [p5]; |
| r7 = 0xffe0 (z); |
| r7 = r7 & r6; |
| cc = r7 == 0; |
| if !cc jump 1f; |
| #endif |
| #ifdef CONFIG_EXACT_HWERR |
| /* Read the ILAT, and to check to see if the process we are |
| * single stepping caused a previous hardware error |
| * If so, do not single step, (which lowers to IRQ5, and makes |
| * us miss the error). |
| */ |
| p5.l = lo(ILAT); |
| p5.h = hi(ILAT); |
| r7 = [p5]; |
| cc = bittst(r7, EVT_IVHW_P); |
| if cc jump 1f; |
| #endif |
| /* Single stepping only a single instruction, so clear the trace |
| * bit here. */ |
| r7 = syscfg; |
| bitclr (r7, SYSCFG_SSSTEP_P); |
| syscfg = R7; |
| jump _ex_trap_c; |
| |
| 1: |
| /* |
| * We were in an interrupt handler. By convention, all of them save |
| * SYSCFG with their first instruction, so by checking whether our |
| * RETX points at the entry point, we can determine whether to allow |
| * a single step, or whether to clear SYSCFG. |
| * |
| * First, find out the interrupt level and the event vector for it. |
| */ |
| p5.l = lo(EVT0); |
| p5.h = hi(EVT0); |
| p5 += -4; |
| 2: |
| r7 = rot r7 by -1; |
| p5 += 4; |
| if !cc jump 2b; |
| |
| /* What we actually do is test for the _second_ instruction in the |
| * IRQ handler. That way, if there are insns following the restore |
| * of SYSCFG after leaving the handler, we will not turn off SYSCFG |
| * for them. */ |
| |
| r7 = [p5]; |
| r7 += 2; |
| r6 = RETX; |
| cc = R7 == R6; |
| if !cc jump _bfin_return_from_exception; |
| |
| r7 = syscfg; |
| bitclr (r7, SYSCFG_SSSTEP_P); /* Turn off single step */ |
| syscfg = R7; |
| |
| /* Fall through to _bfin_return_from_exception. */ |
| ENDPROC(_ex_single_step) |
| |
| ENTRY(_bfin_return_from_exception) |
| #if ANOMALY_05000257 |
| R7=LC0; |
| LC0=R7; |
| R7=LC1; |
| LC1=R7; |
| #endif |
| |
| #ifdef CONFIG_DEBUG_DOUBLEFAULT |
| /* While we were processing the current exception, |
| * did we cause another, and double fault? |
| */ |
| r7 = SEQSTAT; /* reason code is in bit 5:0 */ |
| r6.l = lo(SEQSTAT_EXCAUSE); |
| r6.h = hi(SEQSTAT_EXCAUSE); |
| r7 = r7 & r6; |
| r6 = VEC_UNCOV; |
| CC = R7 == R6; |
| if CC JUMP _double_fault; |
| #endif |
| |
| (R7:6,P5:4) = [sp++]; |
| ASTAT = [sp++]; |
| sp = EX_SCRATCH_REG; |
| rtx; |
| ENDPROC(_bfin_return_from_exception) |
| |
| ENTRY(_handle_bad_cplb) |
| DEBUG_HWTRACE_RESTORE(p5, r7) |
| /* To get here, we just tried and failed to change a CPLB |
| * so, handle things in trap_c (C code), by lowering to |
| * IRQ5, just like we normally do. Since this is not a |
| * "normal" return path, we have a do alot of stuff to |
| * the stack to get ready so, we can fall through - we |
| * need to make a CPLB exception look like a normal exception |
| */ |
| RESTORE_CONTEXT_CPLB |
| /* ASTAT is still on the stack, where it is needed. */ |
| [--sp] = (R7:6,P5:4); |
| |
| ENTRY(_ex_replaceable) |
| nop; |
| |
| ENTRY(_ex_trap_c) |
| /* The only thing that has been saved in this context is |
| * (R7:6,P5:4), ASTAT & SP - don't use anything else |
| */ |
| |
| GET_PDA(p5, r6); |
| |
| /* Make sure we are not in a double fault */ |
| p4.l = lo(IPEND); |
| p4.h = hi(IPEND); |
| r7 = [p4]; |
| CC = BITTST (r7, 5); |
| if CC jump _double_fault; |
| [p5 + PDA_EXIPEND] = r7; |
| |
| /* Call C code (trap_c) to handle the exception, which most |
| * likely involves sending a signal to the current process. |
| * To avoid double faults, lower our priority to IRQ5 first. |
| */ |
| r7.h = _exception_to_level5; |
| r7.l = _exception_to_level5; |
| p4.l = lo(EVT5); |
| p4.h = hi(EVT5); |
| [p4] = r7; |
| csync; |
| |
| /* |
| * Save these registers, as they are only valid in exception context |
| * (where we are now - as soon as we defer to IRQ5, they can change) |
| * DCPLB_STATUS and ICPLB_STATUS are also only valid in EVT3, |
| * but they are not very interesting, so don't save them |
| */ |
| |
| p4.l = lo(DCPLB_FAULT_ADDR); |
| p4.h = hi(DCPLB_FAULT_ADDR); |
| r7 = [p4]; |
| [p5 + PDA_DCPLB] = r7; |
| |
| p4.l = lo(ICPLB_FAULT_ADDR); |
| p4.h = hi(ICPLB_FAULT_ADDR); |
| r6 = [p4]; |
| [p5 + PDA_ICPLB] = r6; |
| |
| r6 = retx; |
| [p5 + PDA_RETX] = r6; |
| |
| r6 = SEQSTAT; |
| [p5 + PDA_SEQSTAT] = r6; |
| |
| /* Save the state of single stepping */ |
| r6 = SYSCFG; |
| [p5 + PDA_SYSCFG] = r6; |
| /* Clear it while we handle the exception in IRQ5 mode */ |
| BITCLR(r6, SYSCFG_SSSTEP_P); |
| SYSCFG = r6; |
| |
| /* Save the current IMASK, since we change in order to jump to level 5 */ |
| cli r6; |
| [p5 + PDA_EXIMASK] = r6; |
| |
| p4.l = lo(SAFE_USER_INSTRUCTION); |
| p4.h = hi(SAFE_USER_INSTRUCTION); |
| retx = p4; |
| |
| /* Disable all interrupts, but make sure level 5 is enabled so |
| * we can switch to that level. |
| */ |
| r6 = 0x3f; |
| sti r6; |
| |
| /* In case interrupts are disabled IPEND[4] (global interrupt disable bit) |
| * clear it (re-enabling interrupts again) by the special sequence of pushing |
| * RETI onto the stack. This way we can lower ourselves to IVG5 even if the |
| * exception was taken after the interrupt handler was called but before it |
| * got a chance to enable global interrupts itself. |
| */ |
| [--sp] = reti; |
| sp += 4; |
| |
| raise 5; |
| jump.s _bfin_return_from_exception; |
| ENDPROC(_ex_trap_c) |
| |
| /* We just realized we got an exception, while we were processing a different |
| * exception. This is a unrecoverable event, so crash. |
| * Note: this cannot be ENTRY() as we jump here with "if cc jump" ... |
| */ |
| ENTRY(_double_fault) |
| /* Turn caches & protection off, to ensure we don't get any more |
| * double exceptions |
| */ |
| |
| P4.L = LO(IMEM_CONTROL); |
| P4.H = HI(IMEM_CONTROL); |
| |
| R5 = [P4]; /* Control Register*/ |
| BITCLR(R5,ENICPLB_P); |
| CSYNC; /* Disabling of CPLBs should be proceeded by a CSYNC */ |
| [P4] = R5; |
| SSYNC; |
| |
| P4.L = LO(DMEM_CONTROL); |
| P4.H = HI(DMEM_CONTROL); |
| R5 = [P4]; |
| BITCLR(R5,ENDCPLB_P); |
| CSYNC; /* Disabling of CPLBs should be proceeded by a CSYNC */ |
| [P4] = R5; |
| SSYNC; |
| |
| /* Fix up the stack */ |
| (R7:6,P5:4) = [sp++]; |
| ASTAT = [sp++]; |
| SP = EX_SCRATCH_REG; |
| |
| /* We should be out of the exception stack, and back down into |
| * kernel or user space stack |
| */ |
| SAVE_ALL_SYS |
| |
| /* The dumping functions expect the return address in the RETI |
| * slot. */ |
| r6 = retx; |
| [sp + PT_PC] = r6; |
| |
| r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */ |
| SP += -12; |
| pseudo_long_call _double_fault_c, p5; |
| SP += 12; |
| .L_double_fault_panic: |
| JUMP .L_double_fault_panic |
| |
| ENDPROC(_double_fault) |
| |
| ENTRY(_exception_to_level5) |
| SAVE_ALL_SYS |
| |
| GET_PDA(p5, r7); /* Fetch current PDA */ |
| r6 = [p5 + PDA_RETX]; |
| [sp + PT_PC] = r6; |
| |
| r6 = [p5 + PDA_SYSCFG]; |
| [sp + PT_SYSCFG] = r6; |
| |
| r6 = [p5 + PDA_SEQSTAT]; /* Read back seqstat */ |
| [sp + PT_SEQSTAT] = r6; |
| |
| /* Restore the hardware error vector. */ |
| r7.h = _evt_ivhw; |
| r7.l = _evt_ivhw; |
| p4.l = lo(EVT5); |
| p4.h = hi(EVT5); |
| [p4] = r7; |
| csync; |
| |
| #ifdef CONFIG_DEBUG_DOUBLEFAULT |
| /* Now that we have the hardware error vector programmed properly |
| * we can re-enable interrupts (IPEND[4]), so if the _trap_c causes |
| * another hardware error, we can catch it (self-nesting). |
| */ |
| [--sp] = reti; |
| sp += 4; |
| #endif |
| |
| r7 = [p5 + PDA_EXIPEND] /* Read the IPEND from the Exception state */ |
| [sp + PT_IPEND] = r7; /* Store IPEND onto the stack */ |
| |
| r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */ |
| SP += -12; |
| pseudo_long_call _trap_c, p4; |
| SP += 12; |
| |
| /* If interrupts were off during the exception (IPEND[4] = 1), turn them off |
| * before we return. |
| */ |
| CC = BITTST(r7, EVT_IRPTEN_P) |
| if !CC jump 1f; |
| /* this will load a random value into the reti register - but that is OK, |
| * since we do restore it to the correct value in the 'RESTORE_ALL_SYS' macro |
| */ |
| sp += -4; |
| reti = [sp++]; |
| 1: |
| /* restore the interrupt mask (IMASK) */ |
| r6 = [p5 + PDA_EXIMASK]; |
| sti r6; |
| |
| call _ret_from_exception; |
| RESTORE_ALL_SYS |
| rti; |
| ENDPROC(_exception_to_level5) |
| |
| ENTRY(_trap) /* Exception: 4th entry into system event table(supervisor mode)*/ |
| /* Since the kernel stack can be anywhere, it's not guaranteed to be |
| * covered by a CPLB. Switch to an exception stack; use RETN as a |
| * scratch register (for want of a better option). |
| */ |
| EX_SCRATCH_REG = sp; |
| GET_PDA_SAFE(sp); |
| sp = [sp + PDA_EXSTACK]; |
| /* Try to deal with syscalls quickly. */ |
| [--sp] = ASTAT; |
| [--sp] = (R7:6,P5:4); |
| |
| ANOMALY_283_315_WORKAROUND(p5, r7) |
| |
| #ifdef CONFIG_EXACT_HWERR |
| /* Make sure all pending read/writes complete. This will ensure any |
| * accesses which could cause hardware errors completes, and signal |
| * the the hardware before we do something silly, like crash the |
| * kernel. We don't need to work around anomaly 05000312, since |
| * we are already atomic |
| */ |
| ssync; |
| #endif |
| |
| #ifdef CONFIG_DEBUG_DOUBLEFAULT |
| /* |
| * Save these registers, as they are only valid in exception context |
| * (where we are now - as soon as we defer to IRQ5, they can change) |
| * DCPLB_STATUS and ICPLB_STATUS are also only valid in EVT3, |
| * but they are not very interesting, so don't save them |
| */ |
| |
| GET_PDA(p5, r7); |
| p4.l = lo(DCPLB_FAULT_ADDR); |
| p4.h = hi(DCPLB_FAULT_ADDR); |
| r7 = [p4]; |
| [p5 + PDA_DF_DCPLB] = r7; |
| |
| p4.l = lo(ICPLB_FAULT_ADDR); |
| p4.h = hi(ICPLB_FAULT_ADDR); |
| r7 = [p4]; |
| [p5 + PDA_DF_ICPLB] = r7; |
| |
| r7 = retx; |
| [p5 + PDA_DF_RETX] = r7; |
| |
| r7 = SEQSTAT; /* reason code is in bit 5:0 */ |
| [p5 + PDA_DF_SEQSTAT] = r7; |
| #else |
| r7 = SEQSTAT; /* reason code is in bit 5:0 */ |
| #endif |
| r6.l = lo(SEQSTAT_EXCAUSE); |
| r6.h = hi(SEQSTAT_EXCAUSE); |
| r7 = r7 & r6; |
| p5.h = _ex_table; |
| p5.l = _ex_table; |
| p4 = r7; |
| p5 = p5 + (p4 << 2); |
| p4 = [p5]; |
| jump (p4); |
| |
| .Lbadsys: |
| r7 = -ENOSYS; /* signextending enough */ |
| [sp + PT_R0] = r7; /* return value from system call */ |
| jump .Lsyscall_really_exit; |
| ENDPROC(_trap) |
| |
| ENTRY(_kernel_execve) |
| link SIZEOF_PTREGS; |
| p0 = sp; |
| r3 = SIZEOF_PTREGS / 4; |
| r4 = 0(x); |
| .Lclear_regs: |
| [p0++] = r4; |
| r3 += -1; |
| cc = r3 == 0; |
| if !cc jump .Lclear_regs (bp); |
| |
| p0 = sp; |
| sp += -16; |
| [sp + 12] = p0; |
| pseudo_long_call _do_execve, p5; |
| SP += 16; |
| cc = r0 == 0; |
| if ! cc jump .Lexecve_failed; |
| /* Success. Copy our temporary pt_regs to the top of the kernel |
| * stack and do a normal exception return. |
| */ |
| r1 = sp; |
| r0 = (-KERNEL_STACK_SIZE) (x); |
| r1 = r1 & r0; |
| p2 = r1; |
| p3 = [p2]; |
| r0 = KERNEL_STACK_SIZE - 4 (z); |
| p1 = r0; |
| p1 = p1 + p2; |
| |
| p0 = fp; |
| r4 = [p0--]; |
| r3 = SIZEOF_PTREGS / 4; |
| .Lcopy_regs: |
| r4 = [p0--]; |
| [p1--] = r4; |
| r3 += -1; |
| cc = r3 == 0; |
| if ! cc jump .Lcopy_regs (bp); |
| |
| r0 = (KERNEL_STACK_SIZE - SIZEOF_PTREGS) (z); |
| p1 = r0; |
| p1 = p1 + p2; |
| sp = p1; |
| r0 = syscfg; |
| [SP + PT_SYSCFG] = r0; |
| [p3 + (TASK_THREAD + THREAD_KSP)] = sp; |
| |
| RESTORE_CONTEXT; |
| rti; |
| .Lexecve_failed: |
| unlink; |
| rts; |
| ENDPROC(_kernel_execve) |
| |
| ENTRY(_system_call) |
| /* Store IPEND */ |
| p2.l = lo(IPEND); |
| p2.h = hi(IPEND); |
| csync; |
| r0 = [p2]; |
| [sp + PT_IPEND] = r0; |
| |
| /* Store RETS for now */ |
| r0 = rets; |
| [sp + PT_RESERVED] = r0; |
| /* Set the stack for the current process */ |
| r7 = sp; |
| r6.l = lo(ALIGN_PAGE_MASK); |
| r6.h = hi(ALIGN_PAGE_MASK); |
| r7 = r7 & r6; /* thread_info */ |
| p2 = r7; |
| p2 = [p2]; |
| |
| [p2+(TASK_THREAD+THREAD_KSP)] = sp; |
| #ifdef CONFIG_IPIPE |
| r0 = sp; |
| SP += -12; |
| pseudo_long_call ___ipipe_syscall_root, p0; |
| SP += 12; |
| cc = r0 == 1; |
| if cc jump .Lsyscall_really_exit; |
| cc = r0 == -1; |
| if cc jump .Lresume_userspace; |
| r3 = [sp + PT_R3]; |
| r4 = [sp + PT_R4]; |
| p0 = [sp + PT_ORIG_P0]; |
| #endif /* CONFIG_IPIPE */ |
| |
| /* are we tracing syscalls?*/ |
| r7 = sp; |
| r6.l = lo(ALIGN_PAGE_MASK); |
| r6.h = hi(ALIGN_PAGE_MASK); |
| r7 = r7 & r6; |
| p2 = r7; |
| r7 = [p2+TI_FLAGS]; |
| CC = BITTST(r7,TIF_SYSCALL_TRACE); |
| if CC JUMP _sys_trace; |
| CC = BITTST(r7,TIF_SINGLESTEP); |
| if CC JUMP _sys_trace; |
| |
| /* Make sure the system call # is valid */ |
| p4 = __NR_syscall; |
| /* System call number is passed in P0 */ |
| cc = p4 <= p0; |
| if cc jump .Lbadsys; |
| |
| /* Execute the appropriate system call */ |
| |
| p4 = p0; |
| p5.l = _sys_call_table; |
| p5.h = _sys_call_table; |
| p5 = p5 + (p4 << 2); |
| r0 = [sp + PT_R0]; |
| r1 = [sp + PT_R1]; |
| r2 = [sp + PT_R2]; |
| p5 = [p5]; |
| |
| [--sp] = r5; |
| [--sp] = r4; |
| [--sp] = r3; |
| SP += -12; |
| call (p5); |
| SP += 24; |
| [sp + PT_R0] = r0; |
| |
| .Lresume_userspace: |
| r7 = sp; |
| r4.l = lo(ALIGN_PAGE_MASK); |
| r4.h = hi(ALIGN_PAGE_MASK); |
| r7 = r7 & r4; /* thread_info->flags */ |
| p5 = r7; |
| .Lresume_userspace_1: |
| /* Disable interrupts. */ |
| [--sp] = reti; |
| reti = [sp++]; |
| |
| r7 = [p5 + TI_FLAGS]; |
| r4.l = lo(_TIF_WORK_MASK); |
| r4.h = hi(_TIF_WORK_MASK); |
| r7 = r7 & r4; |
| |
| .Lsyscall_resched: |
| #ifdef CONFIG_IPIPE |
| cc = BITTST(r7, TIF_IRQ_SYNC); |
| if !cc jump .Lsyscall_no_irqsync; |
| /* |
| * Clear IPEND[4] manually to undo what resume_userspace_1 just did; |
| * we need this so that high priority domain interrupts may still |
| * preempt the current domain while the pipeline log is being played |
| * back. |
| */ |
| [--sp] = reti; |
| SP += 4; /* don't merge with next insn to keep the pattern obvious */ |
| SP += -12; |
| pseudo_long_call ___ipipe_sync_root, p4; |
| SP += 12; |
| jump .Lresume_userspace_1; |
| .Lsyscall_no_irqsync: |
| #endif |
| cc = BITTST(r7, TIF_NEED_RESCHED); |
| if !cc jump .Lsyscall_sigpending; |
| |
| /* Reenable interrupts. */ |
| [--sp] = reti; |
| sp += 4; |
| |
| SP += -12; |
| pseudo_long_call _schedule, p4; |
| SP += 12; |
| |
| jump .Lresume_userspace_1; |
| |
| .Lsyscall_sigpending: |
| cc = BITTST(r7, TIF_RESTORE_SIGMASK); |
| if cc jump .Lsyscall_do_signals; |
| cc = BITTST(r7, TIF_SIGPENDING); |
| if cc jump .Lsyscall_do_signals; |
| cc = BITTST(r7, TIF_NOTIFY_RESUME); |
| if !cc jump .Lsyscall_really_exit; |
| .Lsyscall_do_signals: |
| /* Reenable interrupts. */ |
| [--sp] = reti; |
| sp += 4; |
| |
| r0 = sp; |
| SP += -12; |
| pseudo_long_call _do_notify_resume, p5; |
| SP += 12; |
| |
| .Lsyscall_really_exit: |
| r5 = [sp + PT_RESERVED]; |
| rets = r5; |
| rts; |
| ENDPROC(_system_call) |
| |
| /* Do not mark as ENTRY() to avoid error in assembler ... |
| * this symbol need not be global anyways, so ... |
| */ |
| _sys_trace: |
| r0 = sp; |
| pseudo_long_call _syscall_trace_enter, p5; |
| |
| /* Make sure the system call # is valid */ |
| p4 = [SP + PT_P0]; |
| p3 = __NR_syscall; |
| cc = p3 <= p4; |
| r0 = -ENOSYS; |
| if cc jump .Lsys_trace_badsys; |
| |
| /* Execute the appropriate system call */ |
| p5.l = _sys_call_table; |
| p5.h = _sys_call_table; |
| p5 = p5 + (p4 << 2); |
| r0 = [sp + PT_R0]; |
| r1 = [sp + PT_R1]; |
| r2 = [sp + PT_R2]; |
| r3 = [sp + PT_R3]; |
| r4 = [sp + PT_R4]; |
| r5 = [sp + PT_R5]; |
| p5 = [p5]; |
| |
| [--sp] = r5; |
| [--sp] = r4; |
| [--sp] = r3; |
| SP += -12; |
| call (p5); |
| SP += 24; |
| .Lsys_trace_badsys: |
| [sp + PT_R0] = r0; |
| |
| r0 = sp; |
| pseudo_long_call _syscall_trace_leave, p5; |
| jump .Lresume_userspace; |
| ENDPROC(_sys_trace) |
| |
| ENTRY(_resume) |
| /* |
| * Beware - when entering resume, prev (the current task) is |
| * in r0, next (the new task) is in r1. |
| */ |
| p0 = r0; |
| p1 = r1; |
| [--sp] = rets; |
| [--sp] = fp; |
| [--sp] = (r7:4, p5:3); |
| |
| /* save usp */ |
| p2 = usp; |
| [p0+(TASK_THREAD+THREAD_USP)] = p2; |
| |
| /* save current kernel stack pointer */ |
| [p0+(TASK_THREAD+THREAD_KSP)] = sp; |
| |
| /* save program counter */ |
| r1.l = _new_old_task; |
| r1.h = _new_old_task; |
| [p0+(TASK_THREAD+THREAD_PC)] = r1; |
| |
| /* restore the kernel stack pointer */ |
| sp = [p1+(TASK_THREAD+THREAD_KSP)]; |
| |
| /* restore user stack pointer */ |
| p0 = [p1+(TASK_THREAD+THREAD_USP)]; |
| usp = p0; |
| |
| /* restore pc */ |
| p0 = [p1+(TASK_THREAD+THREAD_PC)]; |
| jump (p0); |
| |
| /* |
| * Following code actually lands up in a new (old) task. |
| */ |
| |
| _new_old_task: |
| (r7:4, p5:3) = [sp++]; |
| fp = [sp++]; |
| rets = [sp++]; |
| |
| /* |
| * When we come out of resume, r0 carries "old" task, becuase we are |
| * in "new" task. |
| */ |
| rts; |
| ENDPROC(_resume) |
| |
| ENTRY(_ret_from_exception) |
| #ifdef CONFIG_IPIPE |
| p2.l = _ipipe_percpu_domain; |
| p2.h = _ipipe_percpu_domain; |
| r0.l = _ipipe_root; |
| r0.h = _ipipe_root; |
| r2 = [p2]; |
| cc = r0 == r2; |
| if !cc jump 4f; /* not on behalf of the root domain, get out */ |
| #endif /* CONFIG_IPIPE */ |
| p2.l = lo(IPEND); |
| p2.h = hi(IPEND); |
| |
| csync; |
| r0 = [p2]; |
| [sp + PT_IPEND] = r0; |
| |
| 1: |
| r2 = LO(~0x37) (Z); |
| r0 = r2 & r0; |
| cc = r0 == 0; |
| if !cc jump 4f; /* if not return to user mode, get out */ |
| |
| /* Make sure any pending system call or deferred exception |
| * return in ILAT for this process to get executed, otherwise |
| * in case context switch happens, system call of |
| * first process (i.e in ILAT) will be carried |
| * forward to the switched process |
| */ |
| |
| p2.l = lo(ILAT); |
| p2.h = hi(ILAT); |
| r0 = [p2]; |
| r1 = (EVT_IVG14 | EVT_IVG15) (z); |
| r0 = r0 & r1; |
| cc = r0 == 0; |
| if !cc jump 5f; |
| |
| /* Set the stack for the current process */ |
| r7 = sp; |
| r4.l = lo(ALIGN_PAGE_MASK); |
| r4.h = hi(ALIGN_PAGE_MASK); |
| r7 = r7 & r4; /* thread_info->flags */ |
| p5 = r7; |
| r7 = [p5 + TI_FLAGS]; |
| r4.l = lo(_TIF_WORK_MASK); |
| r4.h = hi(_TIF_WORK_MASK); |
| r7 = r7 & r4; |
| cc = r7 == 0; |
| if cc jump 4f; |
| |
| p0.l = lo(EVT15); |
| p0.h = hi(EVT15); |
| p1.l = _schedule_and_signal; |
| p1.h = _schedule_and_signal; |
| [p0] = p1; |
| csync; |
| raise 15; /* raise evt15 to do signal or reschedule */ |
| 4: |
| r0 = syscfg; |
| bitclr(r0, SYSCFG_SSSTEP_P); /* Turn off single step */ |
| syscfg = r0; |
| 5: |
| rts; |
| ENDPROC(_ret_from_exception) |
| |
| #if defined(CONFIG_PREEMPT) |
| |
| ENTRY(_up_to_irq14) |
| #if ANOMALY_05000281 || ANOMALY_05000461 |
| r0.l = lo(SAFE_USER_INSTRUCTION); |
| r0.h = hi(SAFE_USER_INSTRUCTION); |
| reti = r0; |
| #endif |
| |
| #ifdef CONFIG_DEBUG_HWERR |
| /* enable irq14 & hwerr interrupt, until we transition to _evt_evt14 */ |
| r0 = (EVT_IVG14 | EVT_IVHW | EVT_IRPTEN | EVT_EVX | EVT_NMI | EVT_RST | EVT_EMU); |
| #else |
| /* Only enable irq14 interrupt, until we transition to _evt_evt14 */ |
| r0 = (EVT_IVG14 | EVT_IRPTEN | EVT_EVX | EVT_NMI | EVT_RST | EVT_EMU); |
| #endif |
| sti r0; |
| |
| p0.l = lo(EVT14); |
| p0.h = hi(EVT14); |
| p1.l = _evt_up_evt14; |
| p1.h = _evt_up_evt14; |
| [p0] = p1; |
| csync; |
| |
| raise 14; |
| 1: |
| jump 1b; |
| ENDPROC(_up_to_irq14) |
| |
| ENTRY(_evt_up_evt14) |
| #ifdef CONFIG_DEBUG_HWERR |
| r0 = (EVT_IVHW | EVT_IRPTEN | EVT_EVX | EVT_NMI | EVT_RST | EVT_EMU); |
| sti r0; |
| #else |
| cli r0; |
| #endif |
| #ifdef CONFIG_TRACE_IRQFLAGS |
| [--sp] = rets; |
| sp += -12; |
| call _trace_hardirqs_off; |
| sp += 12; |
| rets = [sp++]; |
| #endif |
| [--sp] = RETI; |
| SP += 4; |
| |
| /* restore normal evt14 */ |
| p0.l = lo(EVT14); |
| p0.h = hi(EVT14); |
| p1.l = _evt_evt14; |
| p1.h = _evt_evt14; |
| [p0] = p1; |
| csync; |
| |
| rts; |
| ENDPROC(_evt_up_evt14) |
| |
| #endif |
| |
| #ifdef CONFIG_IPIPE |
| |
| _resume_kernel_from_int: |
| r1 = LO(~0x8000) (Z); |
| r1 = r0 & r1; |
| r0 = 1; |
| r0 = r1 - r0; |
| r2 = r1 & r0; |
| cc = r2 == 0; |
| /* Sync the root stage only from the outer interrupt level. */ |
| if !cc jump .Lnosync; |
| r0.l = ___ipipe_sync_root; |
| r0.h = ___ipipe_sync_root; |
| [--sp] = reti; |
| [--sp] = rets; |
| [--sp] = ( r7:4, p5:3 ); |
| SP += -12; |
| call ___ipipe_call_irqtail |
| SP += 12; |
| ( r7:4, p5:3 ) = [sp++]; |
| rets = [sp++]; |
| reti = [sp++]; |
| .Lnosync: |
| rts |
| #elif defined(CONFIG_PREEMPT) |
| |
| _resume_kernel_from_int: |
| /* check preempt_count */ |
| r7 = sp; |
| r4.l = lo(ALIGN_PAGE_MASK); |
| r4.h = hi(ALIGN_PAGE_MASK); |
| r7 = r7 & r4; |
| p5 = r7; |
| r7 = [p5 + TI_PREEMPT]; |
| cc = r7 == 0x0; |
| if !cc jump .Lreturn_to_kernel; |
| .Lneed_schedule: |
| r7 = [p5 + TI_FLAGS]; |
| r4.l = lo(_TIF_WORK_MASK); |
| r4.h = hi(_TIF_WORK_MASK); |
| r7 = r7 & r4; |
| cc = BITTST(r7, TIF_NEED_RESCHED); |
| if !cc jump .Lreturn_to_kernel; |
| /* |
| * let schedule done at level 15, otherwise sheduled process will run |
| * at high level and block low level interrupt |
| */ |
| r6 = reti; /* save reti */ |
| r5.l = .Lkernel_schedule; |
| r5.h = .Lkernel_schedule; |
| reti = r5; |
| rti; |
| .Lkernel_schedule: |
| [--sp] = rets; |
| sp += -12; |
| pseudo_long_call _preempt_schedule_irq, p4; |
| sp += 12; |
| rets = [sp++]; |
| |
| [--sp] = rets; |
| sp += -12; |
| /* up to irq14 so that reti after restore_all can return to irq15(kernel) */ |
| pseudo_long_call _up_to_irq14, p4; |
| sp += 12; |
| rets = [sp++]; |
| |
| reti = r6; /* restore reti so that origin process can return to interrupted point */ |
| |
| jump .Lneed_schedule; |
| #else |
| |
| #define _resume_kernel_from_int .Lreturn_to_kernel |
| #endif |
| |
| ENTRY(_return_from_int) |
| /* If someone else already raised IRQ 15, do nothing. */ |
| csync; |
| p2.l = lo(ILAT); |
| p2.h = hi(ILAT); |
| r0 = [p2]; |
| cc = bittst (r0, EVT_IVG15_P); |
| if cc jump .Lreturn_to_kernel; |
| |
| /* if not return to user mode, get out */ |
| p2.l = lo(IPEND); |
| p2.h = hi(IPEND); |
| r0 = [p2]; |
| r1 = 0x17(Z); |
| r2 = ~r1; |
| r2.h = 0; |
| r0 = r2 & r0; |
| r1 = 1; |
| r1 = r0 - r1; |
| r2 = r0 & r1; |
| cc = r2 == 0; |
| if !cc jump _resume_kernel_from_int; |
| |
| /* Lower the interrupt level to 15. */ |
| p0.l = lo(EVT15); |
| p0.h = hi(EVT15); |
| p1.l = _schedule_and_signal_from_int; |
| p1.h = _schedule_and_signal_from_int; |
| [p0] = p1; |
| csync; |
| #if ANOMALY_05000281 || ANOMALY_05000461 |
| r0.l = lo(SAFE_USER_INSTRUCTION); |
| r0.h = hi(SAFE_USER_INSTRUCTION); |
| reti = r0; |
| #endif |
| r0 = 0x801f (z); |
| STI r0; |
| raise 15; /* raise evt15 to do signal or reschedule */ |
| rti; |
| .Lreturn_to_kernel: |
| rts; |
| ENDPROC(_return_from_int) |
| |
| ENTRY(_lower_to_irq14) |
| #if ANOMALY_05000281 || ANOMALY_05000461 |
| r0.l = lo(SAFE_USER_INSTRUCTION); |
| r0.h = hi(SAFE_USER_INSTRUCTION); |
| reti = r0; |
| #endif |
| |
| #ifdef CONFIG_DEBUG_HWERR |
| /* enable irq14 & hwerr interrupt, until we transition to _evt_evt14 */ |
| r0 = (EVT_IVG14 | EVT_IVHW | EVT_IRPTEN | EVT_EVX | EVT_NMI | EVT_RST | EVT_EMU); |
| #else |
| /* Only enable irq14 interrupt, until we transition to _evt_evt14 */ |
| r0 = (EVT_IVG14 | EVT_IRPTEN | EVT_EVX | EVT_NMI | EVT_RST | EVT_EMU); |
| #endif |
| sti r0; |
| raise 14; |
| rti; |
| ENDPROC(_lower_to_irq14) |
| |
| ENTRY(_evt_evt14) |
| #ifdef CONFIG_DEBUG_HWERR |
| r0 = (EVT_IVHW | EVT_IRPTEN | EVT_EVX | EVT_NMI | EVT_RST | EVT_EMU); |
| sti r0; |
| #else |
| cli r0; |
| #endif |
| #ifdef CONFIG_TRACE_IRQFLAGS |
| [--sp] = rets; |
| sp += -12; |
| call _trace_hardirqs_off; |
| sp += 12; |
| rets = [sp++]; |
| #endif |
| [--sp] = RETI; |
| SP += 4; |
| rts; |
| ENDPROC(_evt_evt14) |
| |
| ENTRY(_schedule_and_signal_from_int) |
| /* To end up here, vector 15 was changed - so we have to change it |
| * back. |
| */ |
| p0.l = lo(EVT15); |
| p0.h = hi(EVT15); |
| p1.l = _evt_system_call; |
| p1.h = _evt_system_call; |
| [p0] = p1; |
| csync; |
| |
| /* Set orig_p0 to -1 to indicate this isn't the end of a syscall. */ |
| r0 = -1 (x); |
| [sp + PT_ORIG_P0] = r0; |
| |
| p1 = rets; |
| [sp + PT_RESERVED] = p1; |
| |
| #ifdef CONFIG_TRACE_IRQFLAGS |
| /* trace_hardirqs_on() checks if all irqs are disabled. But here IRQ 15 |
| * is turned on, so disable all irqs. */ |
| cli r0; |
| sp += -12; |
| call _trace_hardirqs_on; |
| sp += 12; |
| #endif |
| #ifdef CONFIG_SMP |
| GET_PDA(p0, r0); /* Fetch current PDA (can't migrate to other CPU here) */ |
| r0 = [p0 + PDA_IRQFLAGS]; |
| #else |
| p0.l = _bfin_irq_flags; |
| p0.h = _bfin_irq_flags; |
| r0 = [p0]; |
| #endif |
| sti r0; |
| |
| /* finish the userspace "atomic" functions for it */ |
| r1 = FIXED_CODE_END; |
| r2 = [sp + PT_PC]; |
| cc = r1 <= r2; |
| if cc jump .Lresume_userspace (bp); |
| |
| r0 = sp; |
| sp += -12; |
| |
| pseudo_long_call _finish_atomic_sections, p5; |
| sp += 12; |
| jump.s .Lresume_userspace; |
| ENDPROC(_schedule_and_signal_from_int) |
| |
| ENTRY(_schedule_and_signal) |
| SAVE_CONTEXT_SYSCALL |
| /* To end up here, vector 15 was changed - so we have to change it |
| * back. |
| */ |
| p0.l = lo(EVT15); |
| p0.h = hi(EVT15); |
| p1.l = _evt_system_call; |
| p1.h = _evt_system_call; |
| [p0] = p1; |
| csync; |
| p0.l = 1f; |
| p0.h = 1f; |
| [sp + PT_RESERVED] = P0; |
| call .Lresume_userspace; |
| 1: |
| RESTORE_CONTEXT |
| rti; |
| ENDPROC(_schedule_and_signal) |
| |
| /* We handle this 100% in exception space - to reduce overhead |
| * Only potiential problem is if the software buffer gets swapped out of the |
| * CPLB table - then double fault. - so we don't let this happen in other places |
| */ |
| #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND |
| ENTRY(_ex_trace_buff_full) |
| [--sp] = P3; |
| [--sp] = P2; |
| [--sp] = LC0; |
| [--sp] = LT0; |
| [--sp] = LB0; |
| P5.L = _trace_buff_offset; |
| P5.H = _trace_buff_offset; |
| P3 = [P5]; /* trace_buff_offset */ |
| P5.L = lo(TBUFSTAT); |
| P5.H = hi(TBUFSTAT); |
| R7 = [P5]; |
| R7 <<= 1; /* double, since we need to read twice */ |
| LC0 = R7; |
| R7 <<= 2; /* need to shift over again, |
| * to get the number of bytes */ |
| P5.L = lo(TBUF); |
| P5.H = hi(TBUF); |
| R6 = ((1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN)*1024) - 1; |
| |
| P2 = R7; |
| P3 = P3 + P2; |
| R7 = P3; |
| R7 = R7 & R6; |
| P3 = R7; |
| P2.L = _trace_buff_offset; |
| P2.H = _trace_buff_offset; |
| [P2] = P3; |
| |
| P2.L = _software_trace_buff; |
| P2.H = _software_trace_buff; |
| |
| LSETUP (.Lstart, .Lend) LC0; |
| .Lstart: |
| R7 = [P5]; /* read TBUF */ |
| P4 = P3 + P2; |
| [P4] = R7; |
| P3 += -4; |
| R7 = P3; |
| R7 = R7 & R6; |
| .Lend: |
| P3 = R7; |
| |
| LB0 = [sp++]; |
| LT0 = [sp++]; |
| LC0 = [sp++]; |
| P2 = [sp++]; |
| P3 = [sp++]; |
| jump _bfin_return_from_exception; |
| ENDPROC(_ex_trace_buff_full) |
| |
| #if CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN == 4 |
| .data |
| #else |
| .section .l1.data.B |
| #endif /* CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN */ |
| ENTRY(_trace_buff_offset) |
| .long 0; |
| ALIGN |
| ENTRY(_software_trace_buff) |
| .rept ((1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN)*256); |
| .long 0 |
| .endr |
| #endif /* CONFIG_DEBUG_BFIN_HWTRACE_EXPAND */ |
| |
| #if CONFIG_EARLY_PRINTK |
| __INIT |
| ENTRY(_early_trap) |
| SAVE_ALL_SYS |
| trace_buffer_stop(p0,r0); |
| |
| ANOMALY_283_315_WORKAROUND(p4, r5) |
| |
| /* Turn caches off, to ensure we don't get double exceptions */ |
| |
| P4.L = LO(IMEM_CONTROL); |
| P4.H = HI(IMEM_CONTROL); |
| |
| R5 = [P4]; /* Control Register*/ |
| BITCLR(R5,ENICPLB_P); |
| CSYNC; /* Disabling of CPLBs should be proceeded by a CSYNC */ |
| [P4] = R5; |
| SSYNC; |
| |
| P4.L = LO(DMEM_CONTROL); |
| P4.H = HI(DMEM_CONTROL); |
| R5 = [P4]; |
| BITCLR(R5,ENDCPLB_P); |
| CSYNC; /* Disabling of CPLBs should be proceeded by a CSYNC */ |
| [P4] = R5; |
| SSYNC; |
| |
| r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */ |
| r1 = RETX; |
| |
| SP += -12; |
| call _early_trap_c; |
| SP += 12; |
| ENDPROC(_early_trap) |
| __FINIT |
| #endif /* CONFIG_EARLY_PRINTK */ |
| |
| /* |
| * Put these in the kernel data section - that should always be covered by |
| * a CPLB. This is needed to ensure we don't get double fault conditions |
| */ |
| |
| #ifdef CONFIG_SYSCALL_TAB_L1 |
| .section .l1.data |
| #else |
| .data |
| #endif |
| |
| ENTRY(_ex_table) |
| /* entry for each EXCAUSE[5:0] |
| * This table must be in sync with the table in ./kernel/traps.c |
| * EXCPT instruction can provide 4 bits of EXCAUSE, allowing 16 to be user defined |
| */ |
| .long _ex_syscall /* 0x00 - User Defined - Linux Syscall */ |
| .long _ex_trap_c /* 0x01 - User Defined - Software breakpoint */ |
| #ifdef CONFIG_KGDB |
| .long _ex_trap_c /* 0x02 - User Defined - KGDB initial connection |
| and break signal trap */ |
| #else |
| .long _ex_replaceable /* 0x02 - User Defined */ |
| #endif |
| .long _ex_trap_c /* 0x03 - User Defined - userspace stack overflow */ |
| .long _ex_trap_c /* 0x04 - User Defined - dump trace buffer */ |
| .long _ex_replaceable /* 0x05 - User Defined */ |
| .long _ex_replaceable /* 0x06 - User Defined */ |
| .long _ex_replaceable /* 0x07 - User Defined */ |
| .long _ex_replaceable /* 0x08 - User Defined */ |
| .long _ex_replaceable /* 0x09 - User Defined */ |
| .long _ex_replaceable /* 0x0A - User Defined */ |
| .long _ex_replaceable /* 0x0B - User Defined */ |
| .long _ex_replaceable /* 0x0C - User Defined */ |
| .long _ex_replaceable /* 0x0D - User Defined */ |
| .long _ex_replaceable /* 0x0E - User Defined */ |
| .long _ex_replaceable /* 0x0F - User Defined */ |
| .long _ex_single_step /* 0x10 - HW Single step */ |
| #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND |
| .long _ex_trace_buff_full /* 0x11 - Trace Buffer Full */ |
| #else |
| .long _ex_trap_c /* 0x11 - Trace Buffer Full */ |
| #endif |
| .long _ex_trap_c /* 0x12 - Reserved */ |
| .long _ex_trap_c /* 0x13 - Reserved */ |
| .long _ex_trap_c /* 0x14 - Reserved */ |
| .long _ex_trap_c /* 0x15 - Reserved */ |
| .long _ex_trap_c /* 0x16 - Reserved */ |
| .long _ex_trap_c /* 0x17 - Reserved */ |
| .long _ex_trap_c /* 0x18 - Reserved */ |
| .long _ex_trap_c /* 0x19 - Reserved */ |
| .long _ex_trap_c /* 0x1A - Reserved */ |
| .long _ex_trap_c /* 0x1B - Reserved */ |
| .long _ex_trap_c /* 0x1C - Reserved */ |
| .long _ex_trap_c /* 0x1D - Reserved */ |
| .long _ex_trap_c /* 0x1E - Reserved */ |
| .long _ex_trap_c /* 0x1F - Reserved */ |
| .long _ex_trap_c /* 0x20 - Reserved */ |
| .long _ex_trap_c /* 0x21 - Undefined Instruction */ |
| .long _ex_trap_c /* 0x22 - Illegal Instruction Combination */ |
| .long _ex_dviol /* 0x23 - Data CPLB Protection Violation */ |
| .long _ex_trap_c /* 0x24 - Data access misaligned */ |
| .long _ex_trap_c /* 0x25 - Unrecoverable Event */ |
| .long _ex_dmiss /* 0x26 - Data CPLB Miss */ |
| .long _ex_dmult /* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero */ |
| .long _ex_trap_c /* 0x28 - Emulation Watchpoint */ |
| .long _ex_trap_c /* 0x29 - Instruction fetch access error (535 only) */ |
| .long _ex_trap_c /* 0x2A - Instruction fetch misaligned */ |
| .long _ex_trap_c /* 0x2B - Instruction CPLB protection Violation */ |
| .long _ex_icplb_miss /* 0x2C - Instruction CPLB miss */ |
| .long _ex_trap_c /* 0x2D - Instruction CPLB Multiple Hits */ |
| .long _ex_trap_c /* 0x2E - Illegal use of Supervisor Resource */ |
| .long _ex_trap_c /* 0x2E - Illegal use of Supervisor Resource */ |
| .long _ex_trap_c /* 0x2F - Reserved */ |
| .long _ex_trap_c /* 0x30 - Reserved */ |
| .long _ex_trap_c /* 0x31 - Reserved */ |
| .long _ex_trap_c /* 0x32 - Reserved */ |
| .long _ex_trap_c /* 0x33 - Reserved */ |
| .long _ex_trap_c /* 0x34 - Reserved */ |
| .long _ex_trap_c /* 0x35 - Reserved */ |
| .long _ex_trap_c /* 0x36 - Reserved */ |
| .long _ex_trap_c /* 0x37 - Reserved */ |
| .long _ex_trap_c /* 0x38 - Reserved */ |
| .long _ex_trap_c /* 0x39 - Reserved */ |
| .long _ex_trap_c /* 0x3A - Reserved */ |
| .long _ex_trap_c /* 0x3B - Reserved */ |
| .long _ex_trap_c /* 0x3C - Reserved */ |
| .long _ex_trap_c /* 0x3D - Reserved */ |
| .long _ex_trap_c /* 0x3E - Reserved */ |
| .long _ex_trap_c /* 0x3F - Reserved */ |
| END(_ex_table) |
| |
| ENTRY(_sys_call_table) |
| .long _sys_restart_syscall /* 0 */ |
| .long _sys_exit |
| .long _sys_fork |
| .long _sys_read |
| .long _sys_write |
| .long _sys_open /* 5 */ |
| .long _sys_close |
| .long _sys_ni_syscall /* old waitpid */ |
| .long _sys_creat |
| .long _sys_link |
| .long _sys_unlink /* 10 */ |
| .long _sys_execve |
| .long _sys_chdir |
| .long _sys_time |
| .long _sys_mknod |
| .long _sys_chmod /* 15 */ |
| .long _sys_chown /* chown16 */ |
| .long _sys_ni_syscall /* old break syscall holder */ |
| .long _sys_ni_syscall /* old stat */ |
| .long _sys_lseek |
| .long _sys_getpid /* 20 */ |
| .long _sys_mount |
| .long _sys_ni_syscall /* old umount */ |
| .long _sys_setuid |
| .long _sys_getuid |
| .long _sys_stime /* 25 */ |
| .long _sys_ptrace |
| .long _sys_alarm |
| .long _sys_ni_syscall /* old fstat */ |
| .long _sys_pause |
| .long _sys_ni_syscall /* old utime */ /* 30 */ |
| .long _sys_ni_syscall /* old stty syscall holder */ |
| .long _sys_ni_syscall /* old gtty syscall holder */ |
| .long _sys_access |
| .long _sys_nice |
| .long _sys_ni_syscall /* 35 */ /* old ftime syscall holder */ |
| .long _sys_sync |
| .long _sys_kill |
| .long _sys_rename |
| .long _sys_mkdir |
| .long _sys_rmdir /* 40 */ |
| .long _sys_dup |
| .long _sys_pipe |
| .long _sys_times |
| .long _sys_ni_syscall /* old prof syscall holder */ |
| .long _sys_brk /* 45 */ |
| .long _sys_setgid |
| .long _sys_getgid |
| .long _sys_ni_syscall /* old sys_signal */ |
| .long _sys_geteuid /* geteuid16 */ |
| .long _sys_getegid /* getegid16 */ /* 50 */ |
| .long _sys_acct |
| .long _sys_umount /* recycled never used phys() */ |
| .long _sys_ni_syscall /* old lock syscall holder */ |
| .long _sys_ioctl |
| .long _sys_fcntl /* 55 */ |
| .long _sys_ni_syscall /* old mpx syscall holder */ |
| .long _sys_setpgid |
| .long _sys_ni_syscall /* old ulimit syscall holder */ |
| .long _sys_ni_syscall /* old old uname */ |
| .long _sys_umask /* 60 */ |
| .long _sys_chroot |
| .long _sys_ustat |
| .long _sys_dup2 |
| .long _sys_getppid |
| .long _sys_getpgrp /* 65 */ |
| .long _sys_setsid |
| .long _sys_ni_syscall /* old sys_sigaction */ |
| .long _sys_sgetmask |
| .long _sys_ssetmask |
| .long _sys_setreuid /* setreuid16 */ /* 70 */ |
| .long _sys_setregid /* setregid16 */ |
| .long _sys_ni_syscall /* old sys_sigsuspend */ |
| .long _sys_ni_syscall /* old sys_sigpending */ |
| .long _sys_sethostname |
| .long _sys_setrlimit /* 75 */ |
| .long _sys_ni_syscall /* old getrlimit */ |
| .long _sys_getrusage |
| .long _sys_gettimeofday |
| .long _sys_settimeofday |
| .long _sys_getgroups /* getgroups16 */ /* 80 */ |
| .long _sys_setgroups /* setgroups16 */ |
| .long _sys_ni_syscall /* old_select */ |
| .long _sys_symlink |
| .long _sys_ni_syscall /* old lstat */ |
| .long _sys_readlink /* 85 */ |
| .long _sys_uselib |
| .long _sys_ni_syscall /* sys_swapon */ |
| .long _sys_reboot |
| .long _sys_ni_syscall /* old_readdir */ |
| .long _sys_ni_syscall /* sys_mmap */ /* 90 */ |
| .long _sys_munmap |
| .long _sys_truncate |
| .long _sys_ftruncate |
| .long _sys_fchmod |
| .long _sys_fchown /* fchown16 */ /* 95 */ |
| .long _sys_getpriority |
| .long _sys_setpriority |
| .long _sys_ni_syscall /* old profil syscall holder */ |
| .long _sys_statfs |
| .long _sys_fstatfs /* 100 */ |
| .long _sys_ni_syscall |
| .long _sys_ni_syscall /* old sys_socketcall */ |
| .long _sys_syslog |
| .long _sys_setitimer |
| .long _sys_getitimer /* 105 */ |
| .long _sys_newstat |
| .long _sys_newlstat |
| .long _sys_newfstat |
| .long _sys_ni_syscall /* old uname */ |
| .long _sys_ni_syscall /* iopl for i386 */ /* 110 */ |
| .long _sys_vhangup |
| .long _sys_ni_syscall /* obsolete idle() syscall */ |
| .long _sys_ni_syscall /* vm86old for i386 */ |
| .long _sys_wait4 |
| .long _sys_ni_syscall /* 115 */ /* sys_swapoff */ |
| .long _sys_sysinfo |
| .long _sys_ni_syscall /* old sys_ipc */ |
| .long _sys_fsync |
| .long _sys_ni_syscall /* old sys_sigreturn */ |
| .long _sys_clone /* 120 */ |
| .long _sys_setdomainname |
| .long _sys_newuname |
| .long _sys_ni_syscall /* old sys_modify_ldt */ |
| .long _sys_adjtimex |
| .long _sys_mprotect /* 125 */ |
| .long _sys_ni_syscall /* old sys_sigprocmask */ |
| .long _sys_ni_syscall /* old "creat_module" */ |
| .long _sys_init_module |
| .long _sys_delete_module |
| .long _sys_ni_syscall /* 130: old "get_kernel_syms" */ |
| .long _sys_quotactl |
| .long _sys_getpgid |
| .long _sys_fchdir |
| .long _sys_bdflush |
| .long _sys_ni_syscall /* 135 */ /* sys_sysfs */ |
| .long _sys_personality |
| .long _sys_ni_syscall /* for afs_syscall */ |
| .long _sys_setfsuid /* setfsuid16 */ |
| .long _sys_setfsgid /* setfsgid16 */ |
| .long _sys_llseek /* 140 */ |
| .long _sys_getdents |
| .long _sys_ni_syscall /* sys_select */ |
| .long _sys_flock |
| .long _sys_msync |
| .long _sys_readv /* 145 */ |
| .long _sys_writev |
| .long _sys_getsid |
| .long _sys_fdatasync |
| .long _sys_sysctl |
| .long _sys_mlock /* 150 */ |
| .long _sys_munlock |
| .long _sys_mlockall |
| .long _sys_munlockall |
| .long _sys_sched_setparam |
| .long _sys_sched_getparam /* 155 */ |
| .long _sys_sched_setscheduler |
| .long _sys_sched_getscheduler |
| .long _sys_sched_yield |
| .long _sys_sched_get_priority_max |
| .long _sys_sched_get_priority_min /* 160 */ |
| .long _sys_sched_rr_get_interval |
| .long _sys_nanosleep |
| .long _sys_mremap |
| .long _sys_setresuid /* setresuid16 */ |
| .long _sys_getresuid /* getresuid16 */ /* 165 */ |
| .long _sys_ni_syscall /* for vm86 */ |
| .long _sys_ni_syscall /* old "query_module" */ |
| .long _sys_ni_syscall /* sys_poll */ |
| .long _sys_nfsservctl |
| .long _sys_setresgid /* setresgid16 */ /* 170 */ |
| .long _sys_getresgid /* getresgid16 */ |
| .long _sys_prctl |
| .long _sys_rt_sigreturn |
| .long _sys_rt_sigaction |
| .long _sys_rt_sigprocmask /* 175 */ |
| .long _sys_rt_sigpending |
| .long _sys_rt_sigtimedwait |
| .long _sys_rt_sigqueueinfo |
| .long _sys_rt_sigsuspend |
| .long _sys_pread64 /* 180 */ |
| .long _sys_pwrite64 |
| .long _sys_lchown /* lchown16 */ |
| .long _sys_getcwd |
| .long _sys_capget |
| .long _sys_capset /* 185 */ |
| .long _sys_sigaltstack |
| .long _sys_sendfile |
| .long _sys_ni_syscall /* streams1 */ |
| .long _sys_ni_syscall /* streams2 */ |
| .long _sys_vfork /* 190 */ |
| .long _sys_getrlimit |
| .long _sys_mmap_pgoff |
| .long _sys_truncate64 |
| .long _sys_ftruncate64 |
| .long _sys_stat64 /* 195 */ |
| .long _sys_lstat64 |
| .long _sys_fstat64 |
| .long _sys_chown |
| .long _sys_getuid |
| .long _sys_getgid /* 200 */ |
| .long _sys_geteuid |
| .long _sys_getegid |
| .long _sys_setreuid |
| .long _sys_setregid |
| .long _sys_getgroups /* 205 */ |
| .long _sys_setgroups |
| .long _sys_fchown |
| .long _sys_setresuid |
| .long _sys_getresuid |
| .long _sys_setresgid /* 210 */ |
| .long _sys_getresgid |
| .long _sys_lchown |
| .long _sys_setuid |
| .long _sys_setgid |
| .long _sys_setfsuid /* 215 */ |
| .long _sys_setfsgid |
| .long _sys_pivot_root |
| .long _sys_mincore |
| .long _sys_madvise |
| .long _sys_getdents64 /* 220 */ |
| .long _sys_fcntl64 |
| .long _sys_ni_syscall /* reserved for TUX */ |
| .long _sys_ni_syscall |
| .long _sys_gettid |
| .long _sys_readahead /* 225 */ |
| .long _sys_setxattr |
| .long _sys_lsetxattr |
| .long _sys_fsetxattr |
| .long _sys_getxattr |
| .long _sys_lgetxattr /* 230 */ |
| .long _sys_fgetxattr |
| .long _sys_listxattr |
| .long _sys_llistxattr |
| .long _sys_flistxattr |
| .long _sys_removexattr /* 235 */ |
| .long _sys_lremovexattr |
| .long _sys_fremovexattr |
| .long _sys_tkill |
| .long _sys_sendfile64 |
| .long _sys_futex /* 240 */ |
| .long _sys_sched_setaffinity |
| .long _sys_sched_getaffinity |
| .long _sys_ni_syscall /* sys_set_thread_area */ |
| .long _sys_ni_syscall /* sys_get_thread_area */ |
| .long _sys_io_setup /* 245 */ |
| .long _sys_io_destroy |
| .long _sys_io_getevents |
| .long _sys_io_submit |
| .long _sys_io_cancel |
| .long _sys_ni_syscall /* 250 */ /* sys_alloc_hugepages */ |
| .long _sys_ni_syscall /* sys_freec_hugepages */ |
| .long _sys_exit_group |
| .long _sys_lookup_dcookie |
| .long _sys_bfin_spinlock |
| .long _sys_epoll_create /* 255 */ |
| .long _sys_epoll_ctl |
| .long _sys_epoll_wait |
| .long _sys_ni_syscall /* remap_file_pages */ |
| .long _sys_set_tid_address |
| .long _sys_timer_create /* 260 */ |
| .long _sys_timer_settime |
| .long _sys_timer_gettime |
| .long _sys_timer_getoverrun |
| .long _sys_timer_delete |
| .long _sys_clock_settime /* 265 */ |
| .long _sys_clock_gettime |
| .long _sys_clock_getres |
| .long _sys_clock_nanosleep |
| .long _sys_statfs64 |
| .long _sys_fstatfs64 /* 270 */ |
| .long _sys_tgkill |
| .long _sys_utimes |
| .long _sys_fadvise64_64 |
| .long _sys_ni_syscall /* vserver */ |
| .long _sys_mbind /* 275 */ |
| .long _sys_ni_syscall /* get_mempolicy */ |
| .long _sys_ni_syscall /* set_mempolicy */ |
| .long _sys_mq_open |
| .long _sys_mq_unlink |
| .long _sys_mq_timedsend /* 280 */ |
| .long _sys_mq_timedreceive |
| .long _sys_mq_notify |
| .long _sys_mq_getsetattr |
| .long _sys_ni_syscall /* kexec_load */ |
| .long _sys_waitid /* 285 */ |
| .long _sys_add_key |
| .long _sys_request_key |
| .long _sys_keyctl |
| .long _sys_ioprio_set |
| .long _sys_ioprio_get /* 290 */ |
| .long _sys_inotify_init |
| .long _sys_inotify_add_watch |
| .long _sys_inotify_rm_watch |
| .long _sys_ni_syscall /* migrate_pages */ |
| .long _sys_openat /* 295 */ |
| .long _sys_mkdirat |
| .long _sys_mknodat |
| .long _sys_fchownat |
| .long _sys_futimesat |
| .long _sys_fstatat64 /* 300 */ |
| .long _sys_unlinkat |
| .long _sys_renameat |
| .long _sys_linkat |
| .long _sys_symlinkat |
| .long _sys_readlinkat /* 305 */ |
| .long _sys_fchmodat |
| .long _sys_faccessat |
| .long _sys_pselect6 |
| .long _sys_ppoll |
| .long _sys_unshare /* 310 */ |
| .long _sys_sram_alloc |
| .long _sys_sram_free |
| .long _sys_dma_memcpy |
| .long _sys_accept |
| .long _sys_bind /* 315 */ |
| .long _sys_connect |
| .long _sys_getpeername |
| .long _sys_getsockname |
| .long _sys_getsockopt |
| .long _sys_listen /* 320 */ |
| .long _sys_recv |
| .long _sys_recvfrom |
| .long _sys_recvmsg |
| .long _sys_send |
| .long _sys_sendmsg /* 325 */ |
| .long _sys_sendto |
| .long _sys_setsockopt |
| .long _sys_shutdown |
| .long _sys_socket |
| .long _sys_socketpair /* 330 */ |
| .long _sys_semctl |
| .long _sys_semget |
| .long _sys_semop |
| .long _sys_msgctl |
| .long _sys_msgget /* 335 */ |
| .long _sys_msgrcv |
| .long _sys_msgsnd |
| .long _sys_shmat |
| .long _sys_shmctl |
| .long _sys_shmdt /* 340 */ |
| .long _sys_shmget |
| .long _sys_splice |
| .long _sys_sync_file_range |
| .long _sys_tee |
| .long _sys_vmsplice /* 345 */ |
| .long _sys_epoll_pwait |
| .long _sys_utimensat |
| .long _sys_signalfd |
| .long _sys_timerfd_create |
| .long _sys_eventfd /* 350 */ |
| .long _sys_pread64 |
| .long _sys_pwrite64 |
| .long _sys_fadvise64 |
| .long _sys_set_robust_list |
| .long _sys_get_robust_list /* 355 */ |
| .long _sys_fallocate |
| .long _sys_semtimedop |
| .long _sys_timerfd_settime |
| .long _sys_timerfd_gettime |
| .long _sys_signalfd4 /* 360 */ |
| .long _sys_eventfd2 |
| .long _sys_epoll_create1 |
| .long _sys_dup3 |
| .long _sys_pipe2 |
| .long _sys_inotify_init1 /* 365 */ |
| .long _sys_preadv |
| .long _sys_pwritev |
| .long _sys_rt_tgsigqueueinfo |
| .long _sys_perf_event_open |
| .long _sys_recvmmsg /* 370 */ |
| .long _sys_fanotify_init |
| .long _sys_fanotify_mark |
| .long _sys_prlimit64 |
| .long _sys_cacheflush |
| |
| .rept NR_syscalls-(.-_sys_call_table)/4 |
| .long _sys_ni_syscall |
| .endr |
| END(_sys_call_table) |