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| author | Robin Getz <rgetz@blackfin.uclinux.org> | 2008-10-08 18:03:33 +0800 |
|---|---|---|
| committer | Bryan Wu <cooloney@kernel.org> | 2008-10-08 18:03:33 +0800 |
| commit | 9df10281e1c03b1c04d17f387bc59eb932c0bb87 (patch) | |
| tree | 53b59aa5f958964c6e846d01fe7ed688f4884088 /arch/blackfin/mach-common | |
| parent | 7eb2c23f602ab35c5f4227bc87945a3c78a14150 (diff) | |
Blackfin arch: Use DTEST rather than DMA to poke at L1 SRAM during exception context
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin/mach-common')
| -rw-r--r-- | arch/blackfin/mach-common/head.S | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/blackfin/mach-common/head.S b/arch/blackfin/mach-common/head.S index eb9eef0e23b..3069df58072 100644 --- a/arch/blackfin/mach-common/head.S +++ b/arch/blackfin/mach-common/head.S @@ -68,6 +68,16 @@ ENTRY(__start) M2 = r0; M3 = r0; + /* + * Clear ITEST_COMMAND and DTEST_COMMAND registers, + * Leaving these as non-zero can confuse the emulator + */ + p0.L = LO(DTEST_COMMAND); + p0.H = HI(DTEST_COMMAND); + [p0] = R0; + [p0 + (ITEST_COMMAND - DTEST_COMMAND)] = R0; + CSYNC; + trace_buffer_init(p0,r0); P0 = R1; R0 = R1; |