diff options
author | LEROY Christophe <christophe.leroy@c-s.fr> | 2014-09-19 04:36:07 -0400 |
---|---|---|
committer | Scott Wood <scottwood@freescale.com> | 2014-11-07 19:10:38 -0500 |
commit | 749137a2516aea627cbdd49140e60bb60d80f18e (patch) | |
tree | 3c91394b735a7856252b5c3bd38aff3c416585cd /arch/powerpc/kernel | |
parent | 7439b37e7579543226cb30eeefdf989bed391997 (diff) |
powerpc/8xx: DataAccess exception not generated by MPC8xx
DataAccess exception is never generated by MPC8xx so do the job directly where
it is used to avoid an unnecessary branching.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r-- | arch/powerpc/kernel/head_8xx.S | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index d30f703790f4..464be24fd3eb 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S | |||
@@ -219,19 +219,10 @@ MachineCheck: | |||
219 | EXC_XFER_STD(0x200, machine_check_exception) | 219 | EXC_XFER_STD(0x200, machine_check_exception) |
220 | 220 | ||
221 | /* Data access exception. | 221 | /* Data access exception. |
222 | * This is "never generated" by the MPC8xx. We jump to it for other | 222 | * This is "never generated" by the MPC8xx. |
223 | * translation errors. | ||
224 | */ | 223 | */ |
225 | . = 0x300 | 224 | . = 0x300 |
226 | DataAccess: | 225 | DataAccess: |
227 | EXCEPTION_PROLOG | ||
228 | mfspr r10,SPRN_DSISR | ||
229 | stw r10,_DSISR(r11) | ||
230 | mr r5,r10 | ||
231 | mfspr r4,SPRN_DAR | ||
232 | li r10,0x00f0 | ||
233 | mtspr SPRN_DAR,r10 /* Tag DAR, to be used in DTLB Error */ | ||
234 | EXC_XFER_LITE(0x300, handle_page_fault) | ||
235 | 226 | ||
236 | /* Instruction access exception. | 227 | /* Instruction access exception. |
237 | * This is "never generated" by the MPC8xx. | 228 | * This is "never generated" by the MPC8xx. |
@@ -491,7 +482,15 @@ DataTLBError: | |||
491 | beq- FixupDAR /* must be a buggy dcbX, icbi insn. */ | 482 | beq- FixupDAR /* must be a buggy dcbX, icbi insn. */ |
492 | DARFixed:/* Return from dcbx instruction bug workaround */ | 483 | DARFixed:/* Return from dcbx instruction bug workaround */ |
493 | EXCEPTION_EPILOG_0 | 484 | EXCEPTION_EPILOG_0 |
494 | b DataAccess | 485 | EXCEPTION_PROLOG |
486 | mfspr r10,SPRN_DSISR | ||
487 | stw r10,_DSISR(r11) | ||
488 | mr r5,r10 | ||
489 | mfspr r4,SPRN_DAR | ||
490 | li r10,0x00f0 | ||
491 | mtspr SPRN_DAR,r10 /* Tag DAR, to be used in DTLB Error */ | ||
492 | /* 0x300 is DataAccess exception, needed by bad_page_fault() */ | ||
493 | EXC_XFER_LITE(0x300, handle_page_fault) | ||
495 | 494 | ||
496 | EXCEPTION(0x1500, Trap_15, unknown_exception, EXC_XFER_EE) | 495 | EXCEPTION(0x1500, Trap_15, unknown_exception, EXC_XFER_EE) |
497 | EXCEPTION(0x1600, Trap_16, unknown_exception, EXC_XFER_EE) | 496 | EXCEPTION(0x1600, Trap_16, unknown_exception, EXC_XFER_EE) |