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| author | LEROY Christophe <christophe.leroy@c-s.fr> | 2014-09-19 10:36:07 +0200 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2014-11-07 18:10:38 -0600 |
| commit | 749137a2516aea627cbdd49140e60bb60d80f18e (patch) | |
| tree | 3c91394b735a7856252b5c3bd38aff3c416585cd /arch/powerpc/kernel | |
| parent | 7439b37e7579543226cb30eeefdf989bed391997 (diff) | |
| download | linux-749137a2516aea627cbdd49140e60bb60d80f18e.tar.gz | |
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: EXC_XFER_STD(0x200, machine_check_exception) /* Data access exception. - * This is "never generated" by the MPC8xx. We jump to it for other - * translation errors. + * This is "never generated" by the MPC8xx. */ . = 0x300 DataAccess: - EXCEPTION_PROLOG - mfspr r10,SPRN_DSISR - stw r10,_DSISR(r11) - mr r5,r10 - mfspr r4,SPRN_DAR - li r10,0x00f0 - mtspr SPRN_DAR,r10 /* Tag DAR, to be used in DTLB Error */ - EXC_XFER_LITE(0x300, handle_page_fault) /* Instruction access exception. * This is "never generated" by the MPC8xx. @@ -491,7 +482,15 @@ DataTLBError: beq- FixupDAR /* must be a buggy dcbX, icbi insn. */ DARFixed:/* Return from dcbx instruction bug workaround */ EXCEPTION_EPILOG_0 - b DataAccess + EXCEPTION_PROLOG + mfspr r10,SPRN_DSISR + stw r10,_DSISR(r11) + mr r5,r10 + mfspr r4,SPRN_DAR + li r10,0x00f0 + mtspr SPRN_DAR,r10 /* Tag DAR, to be used in DTLB Error */ + /* 0x300 is DataAccess exception, needed by bad_page_fault() */ + EXC_XFER_LITE(0x300, handle_page_fault) EXCEPTION(0x1500, Trap_15, unknown_exception, EXC_XFER_EE) EXCEPTION(0x1600, Trap_16, unknown_exception, EXC_XFER_EE) |