#include <linux/linkage.h>
+#include <linux/unistd.h>
#include <asm/blackfin.h>
-#include <asm/unistd.h>
#include <asm/errno.h>
#include <asm/thread_info.h> /* TIF_NEED_RESCHED */
#include <asm/asm-offsets.h>
+#include <asm/trace.h>
#include <asm/mach-common/context.S>
-#ifdef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE
- /*
- * TODO: this should be proper save/restore, but for now
- * we'll just cheat and use 0x1/0x13
- */
-# define DEBUG_START_HWTRACE \
- P5.l = LO(TBUFCTL); \
- P5.h = HI(TBUFCTL); \
- R7 = 0x13; \
- [P5] = R7;
-# define DEBUG_STOP_HWTRACE \
- P5.l = LO(TBUFCTL); \
- P5.h = HI(TBUFCTL); \
- R7 = 0x01; \
- [P5] = R7;
-#else
-# define DEBUG_START_HWTRACE
-# define DEBUG_STOP_HWTRACE
-#endif
-
#ifdef CONFIG_EXCPT_IRQ_SYSC_L1
.section .l1.text
#else
if !cc jump _return_from_exception;
/* fall through */
#endif
+ENDPROC(_ex_dcplb)
ENTRY(_ex_icplb)
(R7:6,P5:4) = [sp++];
ASTAT = [sp++];
SAVE_ALL_SYS
call __cplb_hdr;
- DEBUG_START_HWTRACE
+ DEBUG_START_HWTRACE(p5, r7)
RESTORE_ALL_SYS
SP = RETN;
rtx;
-
-ENTRY(_ex_spinlock)
- /* Transform this into a syscall - twiddle the syscall vector. */
- p5.l = lo(EVT15);
- p5.h = hi(EVT15);
- r7.l = _spinlock_bh;
- r7.h = _spinlock_bh;
- [p5] = r7;
- csync;
- /* Fall through. */
+ENDPROC(_ex_icplb)
ENTRY(_ex_syscall)
- DEBUG_START_HWTRACE
+ DEBUG_START_HWTRACE(p5, r7)
(R7:6,P5:4) = [sp++];
ASTAT = [sp++];
raise 15; /* invoked by TRAP #0, for sys call */
sp = retn;
rtx
-
-ENTRY(_spinlock_bh)
- SAVE_ALL_SYS
- /* 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;
- r0 = [sp + PT_R0];
- sp += -12;
- call _sys_bfin_spinlock;
- sp += 12;
- [SP + PT_R0] = R0;
- RESTORE_ALL_SYS
- rti;
+ENDPROC(_ex_syscall)
ENTRY(_ex_soft_bp)
r7 = retx;
r7 += -2;
retx = r7;
jump.s _ex_trap_c;
+ENDPROC(_ex_soft_bp)
ENTRY(_ex_single_step)
r7 = retx;
if !cc jump _ex_trap_c;
_return_from_exception:
- DEBUG_START_HWTRACE
+ DEBUG_START_HWTRACE(p5, r7)
+#ifdef ANOMALY_05000257
+ R7=LC0;
+ LC0=R7;
+ R7=LC1;
+ LC1=R7;
+#endif
(R7:6,P5:4) = [sp++];
ASTAT = [sp++];
sp = retn;
rtx;
+ENDPROC(_ex_soft_bp)
ENTRY(_handle_bad_cplb)
/* To get here, we just tried and failed to change a CPLB
* need to make a CPLB exception look like a normal exception
*/
- DEBUG_START_HWTRACE
+ DEBUG_START_HWTRACE(p5, r7)
RESTORE_ALL_SYS
[--sp] = ASTAT;
[--sp] = (R7:6, P5:4);
R6 = SEQSTAT;
[P5] = R6;
- DEBUG_START_HWTRACE
+ DEBUG_START_HWTRACE(p5, r7)
(R7:6,P5:4) = [sp++];
ASTAT = [sp++];
SP = RETN;
raise 5;
rtx;
+ENDPROC(_ex_trap_c)
ENTRY(_exception_to_level5)
SAVE_ALL_SYS
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
/* Try to deal with syscalls quickly. */
[--sp] = ASTAT;
[--sp] = (R7:6, P5:4);
- DEBUG_STOP_HWTRACE
+ DEBUG_STOP_HWTRACE(p5, r7)
r7 = SEQSTAT; /* reason code is in bit 5:0 */
r6.l = lo(SEQSTAT_EXCAUSE);
r6.h = hi(SEQSTAT_EXCAUSE);
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;
1:
unlink;
rts;
+ENDPROC(_kernel_execve)
ENTRY(_system_call)
/* Store IPEND */
r5 = [sp + PT_RESERVED];
rets = r5;
rts;
+ENDPROC(_system_call)
_sys_trace:
call _syscall_trace;
call _syscall_trace;
jump .Lresume_userspace;
+ENDPROC(_sys_trace)
ENTRY(_resume)
/*
* in "new" task.
*/
rts;
+ENDPROC(_resume)
ENTRY(_ret_from_exception)
p2.l = lo(IPEND);
syscfg = r0;
5:
rts;
+ENDPROC(_ret_from_exception)
ENTRY(_return_from_int)
/* If someone else already raised IRQ 15, do nothing. */
rti;
2:
rts;
+ENDPROC(_return_from_int)
ENTRY(_lower_to_irq14)
#if defined(ANOMALY_05000281)
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;
r0 = [p0];
sti r0;
+ r0 = sp;
+ sp += -12;
+ call _finish_atomic_sections;
+ sp += 12;
jump.s .Lresume_userspace;
_schedule_and_signal:
1:
RESTORE_CONTEXT
rti;
+ENDPROC(_lower_to_irq14)
/* Make sure when we start, that the circular buffer is initialized properly
* R0 and P0 are call clobbered, so we can use them here.
p0.l = _out_ptr_excause;
[p0] = r0;
rts;
+ENDPROC(_init_exception_buff)
/*
* Put these in the kernel data section - that should always be covered by
ALIGN
_extable:
/* entry for each EXCAUSE[5:0]
- * This table bmust be in sync with the table in ./kernel/traps.c
+ * 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_soft_bp /* 0x01 - User Defined - Software breakpoint */
.long _ex_trap_c /* 0x02 - User Defined */
- .long _ex_trap_c /* 0x03 - User Defined - Atomic test and set service */
- .long _ex_spinlock /* 0x04 - User Defined */
+ .long _ex_trap_c /* 0x03 - User Defined - userspace stack overflow */
+ .long _ex_trap_c /* 0x04 - User Defined */
.long _ex_trap_c /* 0x05 - User Defined */
.long _ex_trap_c /* 0x06 - User Defined */
.long _ex_trap_c /* 0x07 - User Defined */
git.openpandora.org / pandora-kernel.git / blobdiff