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| author | Robin Getz <rgetz@blackfin.uclinux.org> | 2008-10-08 16:27:12 +0800 |
|---|---|---|
| committer | Bryan Wu <cooloney@kernel.org> | 2008-10-08 16:27:12 +0800 |
| commit | 0c7a6b2135c1bcb5139ca9ca87f292caafcb9410 (patch) | |
| tree | ee1e8b36a4dba9120035ddac270e63ba91dc649c /arch/blackfin/mach-common/head.S | |
| parent | f4585a08479a730fb809606b8ee327a5398c117c (diff) | |
| download | op-kernel-dev-0c7a6b2135c1bcb5139ca9ca87f292caafcb9410.zip op-kernel-dev-0c7a6b2135c1bcb5139ca9ca87f292caafcb9410.tar.gz | |
Blackfin arch: add supporting for double fault debug handling
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin/mach-common/head.S')
| -rw-r--r-- | arch/blackfin/mach-common/head.S | 40 |
1 files changed, 37 insertions, 3 deletions
diff --git a/arch/blackfin/mach-common/head.S b/arch/blackfin/mach-common/head.S index 191b4e9..7cb21cf 100644 --- a/arch/blackfin/mach-common/head.S +++ b/arch/blackfin/mach-common/head.S @@ -90,12 +90,46 @@ ENTRY(__start) [p0] = R0; SSYNC; - /* Save RETX, in case of doublefault */ - p0.l = ___retx; - p0.h = ___retx; + /* in case of double faults, save a few things */ + p0.l = _init_retx; + p0.h = _init_retx; R0 = RETX; [P0] = R0; +#ifdef CONFIG_DEBUG_DOUBLEFAULT + /* Only save these if we are storing them, + * This happens here, since L1 gets clobbered + * below + */ + p0.l = _saved_retx; + p0.h = _saved_retx; + p1.l = _init_saved_retx; + p1.h = _init_saved_retx; + r0 = [p0]; + [p1] = r0; + + p0.l = _saved_dcplb_fault_addr; + p0.h = _saved_dcplb_fault_addr; + p1.l = _init_saved_dcplb_fault_addr; + p1.h = _init_saved_dcplb_fault_addr; + r0 = [p0]; + [p1] = r0; + + p0.l = _saved_icplb_fault_addr; + p0.h = _saved_icplb_fault_addr; + p1.l = _init_saved_icplb_fault_addr; + p1.h = _init_saved_icplb_fault_addr; + r0 = [p0]; + [p1] = r0; + + p0.l = _saved_seqstat; + p0.h = _saved_seqstat; + p1.l = _init_saved_seqstat; + p1.h = _init_saved_seqstat; + r0 = [p0]; + [p1] = r0; +#endif + /* Initialize stack pointer */ sp.l = lo(INITIAL_STACK); sp.h = hi(INITIAL_STACK); |
