1763 lines
43 KiB
ArmAsm
1763 lines
43 KiB
ArmAsm
/*
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* Contains the system-call and fault low-level handling routines.
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* This also contains the timer-interrupt handler, as well as all
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* interrupts and faults that can result in a task-switch.
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*
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* Copyright 2005-2009 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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/* NOTE: This code handles signal-recognition, which happens every time
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* after a timer-interrupt and after each system call.
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*/
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#include <linux/init.h>
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#include <linux/linkage.h>
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#include <linux/unistd.h>
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#include <asm/blackfin.h>
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#include <asm/errno.h>
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#include <asm/fixed_code.h>
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#include <asm/thread_info.h> /* TIF_NEED_RESCHED */
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#include <asm/asm-offsets.h>
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#include <asm/trace.h>
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#include <asm/traps.h>
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#include <asm/context.S>
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#if defined(CONFIG_BFIN_SCRATCH_REG_RETN)
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# define EX_SCRATCH_REG RETN
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#elif defined(CONFIG_BFIN_SCRATCH_REG_RETE)
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# define EX_SCRATCH_REG RETE
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#else
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# define EX_SCRATCH_REG CYCLES
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#endif
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#ifdef CONFIG_EXCPT_IRQ_SYSC_L1
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.section .l1.text
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#else
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.text
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#endif
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/* Slightly simplified and streamlined entry point for CPLB misses.
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* This one does not lower the level to IRQ5, and thus can be used to
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* patch up CPLB misses on the kernel stack.
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*/
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#if ANOMALY_05000261
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#define _ex_dviol _ex_workaround_261
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#define _ex_dmiss _ex_workaround_261
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#define _ex_dmult _ex_workaround_261
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ENTRY(_ex_workaround_261)
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/*
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* Work around an anomaly: if we see a new DCPLB fault, return
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* without doing anything. Then, if we get the same fault again,
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* handle it.
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*/
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P4 = R7; /* Store EXCAUSE */
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GET_PDA(p5, r7);
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r7 = [p5 + PDA_LFRETX];
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r6 = retx;
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[p5 + PDA_LFRETX] = r6;
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cc = r6 == r7;
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if !cc jump _bfin_return_from_exception;
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/* fall through */
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R7 = P4;
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R6 = VEC_CPLB_M; /* Data CPLB Miss */
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cc = R6 == R7;
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if cc jump _ex_dcplb_miss (BP);
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#ifdef CONFIG_MPU
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R6 = VEC_CPLB_VL; /* Data CPLB Violation */
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cc = R6 == R7;
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if cc jump _ex_dcplb_viol (BP);
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#endif
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/* Handle Data CPLB Protection Violation
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* and Data CPLB Multiple Hits - Linux Trap Zero
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*/
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jump _ex_trap_c;
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ENDPROC(_ex_workaround_261)
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#else
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#ifdef CONFIG_MPU
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#define _ex_dviol _ex_dcplb_viol
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#else
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#define _ex_dviol _ex_trap_c
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#endif
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#define _ex_dmiss _ex_dcplb_miss
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#define _ex_dmult _ex_trap_c
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#endif
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ENTRY(_ex_dcplb_viol)
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ENTRY(_ex_dcplb_miss)
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ENTRY(_ex_icplb_miss)
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(R7:6,P5:4) = [sp++];
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/* We leave the previously pushed ASTAT on the stack. */
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SAVE_CONTEXT_CPLB
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/* We must load R1 here, _before_ DEBUG_HWTRACE_SAVE, since that
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* will change the stack pointer. */
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R0 = SEQSTAT;
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R1 = SP;
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DEBUG_HWTRACE_SAVE(p5, r7)
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sp += -12;
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call _cplb_hdr;
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sp += 12;
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CC = R0 == 0;
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IF !CC JUMP _handle_bad_cplb;
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#ifdef CONFIG_DEBUG_DOUBLEFAULT
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/* While we were processing this, did we double fault? */
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r7 = SEQSTAT; /* reason code is in bit 5:0 */
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r6.l = lo(SEQSTAT_EXCAUSE);
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r6.h = hi(SEQSTAT_EXCAUSE);
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r7 = r7 & r6;
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r6 = 0x25;
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CC = R7 == R6;
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if CC JUMP _double_fault;
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#endif
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DEBUG_HWTRACE_RESTORE(p5, r7)
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RESTORE_CONTEXT_CPLB
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ASTAT = [SP++];
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SP = EX_SCRATCH_REG;
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rtx;
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ENDPROC(_ex_icplb_miss)
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ENTRY(_ex_syscall)
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raise 15; /* invoked by TRAP #0, for sys call */
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jump.s _bfin_return_from_exception;
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ENDPROC(_ex_syscall)
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ENTRY(_ex_single_step)
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/* If we just returned from an interrupt, the single step event is
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for the RTI instruction. */
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r7 = retx;
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r6 = reti;
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cc = r7 == r6;
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if cc jump _bfin_return_from_exception;
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#ifdef CONFIG_KGDB
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/* Don't do single step in hardware exception handler */
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p5.l = lo(IPEND);
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p5.h = hi(IPEND);
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r6 = [p5];
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cc = bittst(r6, 4);
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if cc jump _bfin_return_from_exception;
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cc = bittst(r6, 5);
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if cc jump _bfin_return_from_exception;
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/* skip single step if current interrupt priority is higher than
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* that of the first instruction, from which gdb starts single step */
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r6 >>= 6;
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r7 = 10;
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.Lfind_priority_start:
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cc = bittst(r6, 0);
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if cc jump .Lfind_priority_done;
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r6 >>= 1;
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r7 += -1;
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cc = r7 == 0;
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if cc jump .Lfind_priority_done;
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jump.s .Lfind_priority_start;
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.Lfind_priority_done:
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p4.l = _kgdb_single_step;
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p4.h = _kgdb_single_step;
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r6 = [p4];
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cc = r6 == 0;
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if cc jump .Ldo_single_step;
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r6 += -1;
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cc = r6 < r7;
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if cc jump 1f;
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.Ldo_single_step:
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#else
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/* If we were in user mode, do the single step normally. */
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p5.l = lo(IPEND);
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p5.h = hi(IPEND);
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r6 = [p5];
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r7 = 0xffe0 (z);
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r7 = r7 & r6;
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cc = r7 == 0;
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if !cc jump 1f;
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#endif
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#ifdef CONFIG_EXACT_HWERR
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/* Read the ILAT, and to check to see if the process we are
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* single stepping caused a previous hardware error
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* If so, do not single step, (which lowers to IRQ5, and makes
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* us miss the error).
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*/
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p5.l = lo(ILAT);
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p5.h = hi(ILAT);
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r7 = [p5];
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cc = bittst(r7, EVT_IVHW_P);
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if cc jump 1f;
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#endif
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/* Single stepping only a single instruction, so clear the trace
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* bit here. */
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r7 = syscfg;
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bitclr (r7, SYSCFG_SSSTEP_P);
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syscfg = R7;
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jump _ex_trap_c;
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1:
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/*
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* We were in an interrupt handler. By convention, all of them save
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* SYSCFG with their first instruction, so by checking whether our
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* RETX points at the entry point, we can determine whether to allow
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* a single step, or whether to clear SYSCFG.
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*
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* First, find out the interrupt level and the event vector for it.
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*/
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p5.l = lo(EVT0);
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p5.h = hi(EVT0);
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p5 += -4;
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2:
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r7 = rot r7 by -1;
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p5 += 4;
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if !cc jump 2b;
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/* What we actually do is test for the _second_ instruction in the
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* IRQ handler. That way, if there are insns following the restore
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* of SYSCFG after leaving the handler, we will not turn off SYSCFG
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* for them. */
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r7 = [p5];
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r7 += 2;
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r6 = RETX;
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cc = R7 == R6;
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if !cc jump _bfin_return_from_exception;
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r7 = syscfg;
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bitclr (r7, SYSCFG_SSSTEP_P); /* Turn off single step */
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syscfg = R7;
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/* Fall through to _bfin_return_from_exception. */
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ENDPROC(_ex_single_step)
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ENTRY(_bfin_return_from_exception)
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#if ANOMALY_05000257
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R7=LC0;
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LC0=R7;
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R7=LC1;
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LC1=R7;
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#endif
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#ifdef CONFIG_DEBUG_DOUBLEFAULT
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/* While we were processing the current exception,
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* did we cause another, and double fault?
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*/
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r7 = SEQSTAT; /* reason code is in bit 5:0 */
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r6.l = lo(SEQSTAT_EXCAUSE);
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r6.h = hi(SEQSTAT_EXCAUSE);
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r7 = r7 & r6;
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r6 = VEC_UNCOV;
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CC = R7 == R6;
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if CC JUMP _double_fault;
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#endif
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(R7:6,P5:4) = [sp++];
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ASTAT = [sp++];
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sp = EX_SCRATCH_REG;
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rtx;
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ENDPROC(_bfin_return_from_exception)
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ENTRY(_handle_bad_cplb)
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DEBUG_HWTRACE_RESTORE(p5, r7)
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/* To get here, we just tried and failed to change a CPLB
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* so, handle things in trap_c (C code), by lowering to
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* IRQ5, just like we normally do. Since this is not a
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* "normal" return path, we have a do a lot of stuff to
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* the stack to get ready so, we can fall through - we
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* need to make a CPLB exception look like a normal exception
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*/
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RESTORE_CONTEXT_CPLB
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/* ASTAT is still on the stack, where it is needed. */
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[--sp] = (R7:6,P5:4);
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ENTRY(_ex_replaceable)
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nop;
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ENTRY(_ex_trap_c)
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/* The only thing that has been saved in this context is
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* (R7:6,P5:4), ASTAT & SP - don't use anything else
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*/
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GET_PDA(p5, r6);
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/* Make sure we are not in a double fault */
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p4.l = lo(IPEND);
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p4.h = hi(IPEND);
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r7 = [p4];
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CC = BITTST (r7, 5);
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if CC jump _double_fault;
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[p5 + PDA_EXIPEND] = r7;
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/* Call C code (trap_c) to handle the exception, which most
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* likely involves sending a signal to the current process.
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* To avoid double faults, lower our priority to IRQ5 first.
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*/
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r7.h = _exception_to_level5;
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r7.l = _exception_to_level5;
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p4.l = lo(EVT5);
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p4.h = hi(EVT5);
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[p4] = r7;
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csync;
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/*
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* Save these registers, as they are only valid in exception context
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* (where we are now - as soon as we defer to IRQ5, they can change)
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* DCPLB_STATUS and ICPLB_STATUS are also only valid in EVT3,
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* but they are not very interesting, so don't save them
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*/
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p4.l = lo(DCPLB_FAULT_ADDR);
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p4.h = hi(DCPLB_FAULT_ADDR);
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r7 = [p4];
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[p5 + PDA_DCPLB] = r7;
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p4.l = lo(ICPLB_FAULT_ADDR);
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p4.h = hi(ICPLB_FAULT_ADDR);
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r6 = [p4];
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[p5 + PDA_ICPLB] = r6;
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r6 = retx;
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[p5 + PDA_RETX] = r6;
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r6 = SEQSTAT;
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[p5 + PDA_SEQSTAT] = r6;
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/* Save the state of single stepping */
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r6 = SYSCFG;
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[p5 + PDA_SYSCFG] = r6;
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/* Clear it while we handle the exception in IRQ5 mode */
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BITCLR(r6, SYSCFG_SSSTEP_P);
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SYSCFG = r6;
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/* Save the current IMASK, since we change in order to jump to level 5 */
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cli r6;
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[p5 + PDA_EXIMASK] = r6;
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p4.l = lo(SAFE_USER_INSTRUCTION);
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p4.h = hi(SAFE_USER_INSTRUCTION);
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retx = p4;
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/* Disable all interrupts, but make sure level 5 is enabled so
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* we can switch to that level.
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*/
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r6 = 0x3f;
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sti r6;
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/* In case interrupts are disabled IPEND[4] (global interrupt disable bit)
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* clear it (re-enabling interrupts again) by the special sequence of pushing
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* RETI onto the stack. This way we can lower ourselves to IVG5 even if the
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* exception was taken after the interrupt handler was called but before it
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* got a chance to enable global interrupts itself.
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*/
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[--sp] = reti;
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sp += 4;
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raise 5;
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jump.s _bfin_return_from_exception;
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ENDPROC(_ex_trap_c)
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/* We just realized we got an exception, while we were processing a different
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* exception. This is a unrecoverable event, so crash.
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* Note: this cannot be ENTRY() as we jump here with "if cc jump" ...
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*/
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ENTRY(_double_fault)
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/* Turn caches & protection off, to ensure we don't get any more
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* double exceptions
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*/
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P4.L = LO(IMEM_CONTROL);
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P4.H = HI(IMEM_CONTROL);
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R5 = [P4]; /* Control Register*/
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BITCLR(R5,ENICPLB_P);
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CSYNC; /* Disabling of CPLBs should be proceeded by a CSYNC */
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[P4] = R5;
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SSYNC;
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P4.L = LO(DMEM_CONTROL);
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P4.H = HI(DMEM_CONTROL);
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R5 = [P4];
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BITCLR(R5,ENDCPLB_P);
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CSYNC; /* Disabling of CPLBs should be proceeded by a CSYNC */
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[P4] = R5;
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SSYNC;
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/* Fix up the stack */
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(R7:6,P5:4) = [sp++];
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ASTAT = [sp++];
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SP = EX_SCRATCH_REG;
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/* We should be out of the exception stack, and back down into
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* kernel or user space stack
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*/
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SAVE_ALL_SYS
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/* The dumping functions expect the return address in the RETI
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* slot. */
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r6 = retx;
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[sp + PT_PC] = r6;
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r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */
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SP += -12;
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pseudo_long_call _double_fault_c, p5;
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SP += 12;
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.L_double_fault_panic:
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JUMP .L_double_fault_panic
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ENDPROC(_double_fault)
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ENTRY(_exception_to_level5)
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SAVE_ALL_SYS
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GET_PDA(p5, r7); /* Fetch current PDA */
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r6 = [p5 + PDA_RETX];
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[sp + PT_PC] = r6;
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r6 = [p5 + PDA_SYSCFG];
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[sp + PT_SYSCFG] = r6;
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r6 = [p5 + PDA_SEQSTAT]; /* Read back seqstat */
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[sp + PT_SEQSTAT] = r6;
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/* Restore the hardware error vector. */
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r7.h = _evt_ivhw;
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r7.l = _evt_ivhw;
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p4.l = lo(EVT5);
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p4.h = hi(EVT5);
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[p4] = r7;
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csync;
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|
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#ifdef CONFIG_DEBUG_DOUBLEFAULT
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/* Now that we have the hardware error vector programmed properly
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* we can re-enable interrupts (IPEND[4]), so if the _trap_c causes
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* another hardware error, we can catch it (self-nesting).
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*/
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[--sp] = reti;
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sp += 4;
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#endif
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r7 = [p5 + PDA_EXIPEND] /* Read the IPEND from the Exception state */
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[sp + PT_IPEND] = r7; /* Store IPEND onto the stack */
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r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */
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SP += -12;
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pseudo_long_call _trap_c, p4;
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SP += 12;
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|
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/* If interrupts were off during the exception (IPEND[4] = 1), turn them off
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* before we return.
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*/
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CC = BITTST(r7, EVT_IRPTEN_P)
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if !CC jump 1f;
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/* this will load a random value into the reti register - but that is OK,
|
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* since we do restore it to the correct value in the 'RESTORE_ALL_SYS' macro
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*/
|
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sp += -4;
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reti = [sp++];
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1:
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/* restore the interrupt mask (IMASK) */
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r6 = [p5 + PDA_EXIMASK];
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sti r6;
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call _ret_from_exception;
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RESTORE_ALL_SYS
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rti;
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ENDPROC(_exception_to_level5)
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|
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ENTRY(_trap) /* Exception: 4th entry into system event table(supervisor mode)*/
|
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/* Since the kernel stack can be anywhere, it's not guaranteed to be
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* covered by a CPLB. Switch to an exception stack; use RETN as a
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* scratch register (for want of a better option).
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*/
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EX_SCRATCH_REG = sp;
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GET_PDA_SAFE(sp);
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sp = [sp + PDA_EXSTACK];
|
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/* Try to deal with syscalls quickly. */
|
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[--sp] = ASTAT;
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[--sp] = (R7:6,P5:4);
|
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|
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ANOMALY_283_315_WORKAROUND(p5, r7)
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|
|
#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
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* we are already atomic
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*/
|
|
ssync;
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|
#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, because 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
|
|
.long _sys_name_to_handle_at /* 375 */
|
|
.long _sys_open_by_handle_at
|
|
.long _sys_clock_adjtime
|
|
.long _sys_syncfs
|
|
.long _sys_setns
|
|
.long _sys_sendmmsg /* 380 */
|
|
|
|
.rept NR_syscalls-(.-_sys_call_table)/4
|
|
.long _sys_ni_syscall
|
|
.endr
|
|
END(_sys_call_table)
|