* 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>
* This one does not lower the level to IRQ5, and thus can be used to
* patch up CPLB misses on the kernel stack.
*/
-ENTRY(_ex_dcplb)
#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 */
p5.l = _last_cplb_fault_retx;
p5.h = _last_cplb_fault_retx;
r7 = [p5];
r6 = retx;
[p5] = r6;
cc = r6 == r7;
- if !cc jump _return_from_exception;
+ if !cc jump _bfin_return_from_exception;
/* fall through */
+ R7 = P4;
+ R6 = 0x26; /* Data CPLB Miss */
+ cc = R6 == R7;
+ if cc jump _ex_dcplb_miss (BP);
+ R6 = 0x23; /* Data CPLB Miss */
+ cc = R6 == R7;
+ if cc jump _ex_dcplb_viol (BP);
+ /* Handle 0x23 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
-ENDPROC(_ex_dcplb)
-ENTRY(_ex_icplb)
+
+ENTRY(_ex_dcplb_viol)
+ENTRY(_ex_dcplb_miss)
+ENTRY(_ex_icplb_miss)
(R7:6,P5:4) = [sp++];
ASTAT = [sp++];
SAVE_ALL_SYS
+#ifdef CONFIG_MPU
+ R0 = SEQSTAT;
+ R1 = SP;
+ sp += -12;
+ call _cplb_hdr;
+ sp += 12;
+ CC = R0 == 0;
+ IF !CC JUMP _handle_bad_cplb;
+#else
call __cplb_hdr;
+#endif
DEBUG_START_HWTRACE(p5, r7)
RESTORE_ALL_SYS
SP = EX_SCRATCH_REG;
rtx;
-ENDPROC(_ex_icplb)
+ENDPROC(_ex_icplb_miss)
ENTRY(_ex_syscall)
DEBUG_START_HWTRACE(p5, r7)
r7 = retx;
r6 = reti;
cc = r7 == r6;
- if cc jump _return_from_exception
+ if cc jump _bfin_return_from_exception
r7 = syscfg;
bitclr (r7, 0);
syscfg = R7;
r7 = [p4];
cc = r6 == r7;
if !cc jump _ex_trap_c;
+ENDPROC(_ex_single_step)
-ENTRY(_return_from_exception)
+ENTRY(_bfin_return_from_exception)
DEBUG_START_HWTRACE(p5, r7)
#if ANOMALY_05000257
R7=LC0;
ASTAT = [sp++];
sp = EX_SCRATCH_REG;
rtx;
-ENDPROC(_ex_soft_bp)
+ENDPROC(_bfin_return_from_exception)
ENTRY(_handle_bad_cplb)
/* To get here, we just tried and failed to change a CPLB
R7 = R7 + R6;
P5 = R7;
R1 = [P5];
- [SP + 8] = r1;
+ [SP + PT_SEQSTAT] = r1;
r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */
SP += -12;
[sp + PT_IPEND] = r0;
1:
- r1 = 0x37(Z);
- r2 = ~r1;
- r2.h = 0;
+ r2 = LO(~0x37) (Z);
r0 = r2 & r0;
cc = r0 == 0;
if !cc jump 4f; /* if not return to user mode, get out */
LC0 = [sp++];
P2 = [sp++];
P3 = [sp++];
- jump _return_from_exception;
+ jump _bfin_return_from_exception;
ENDPROC(_ex_trace_buff_full)
#if CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN == 4
#endif /* CONFIG_DEBUG_BFIN_HWTRACE_EXPAND */
#if CONFIG_EARLY_PRINTK
-.section .init.text
+__INIT
ENTRY(_early_trap)
SAVE_ALL_SYS
trace_buffer_stop(p0,r0);
call _early_trap_c;
SP += 12;
ENDPROC(_early_trap)
+__FINIT
#endif /* CONFIG_EARLY_PRINTK */
/*
#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
.long _ex_soft_bp /* 0x01 - User Defined - Software breakpoint */
.long _ex_replaceable /* 0x02 - User Defined */
.long _ex_trap_c /* 0x03 - User Defined - userspace stack overflow */
- .long _ex_replaceable /* 0x04 - User Defined */
+ .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_trap_c /* 0x20 - Reserved */
.long _ex_trap_c /* 0x21 - Undefined Instruction */
.long _ex_trap_c /* 0x22 - Illegal Instruction Combination */
- .long _ex_dcplb /* 0x23 - Data CPLB Protection Violation */
+ .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_dcplb /* 0x26 - Data CPLB Miss */
- .long _ex_trap_c /* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero */
+ .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_icplb /* 0x2B - Instruction CPLB protection Violation */
- .long _ex_icplb /* 0x2C - Instruction CPLB miss */
+ .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 _sys_epoll_pwait
.long _sys_utimensat
.long _sys_signalfd
- .long _sys_timerfd
+ .long _sys_ni_syscall
.long _sys_eventfd /* 350 */
.long _sys_pread64
.long _sys_pwrite64
.long _sys_set_robust_list
.long _sys_get_robust_list /* 355 */
.long _sys_fallocate
+ .long _sys_semtimedop
.rept NR_syscalls-(.-_sys_call_table)/4
.long _sys_ni_syscall
.endr
projects / mirror_ubuntu-zesty-kernel.git / blobdiff