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This patch is a part of the BSP source reorganization.
Update #3285.
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These modifications were required by hand after running the script.
In some cases, the file names did not match patterns. In others,
the format of the file did not match any common patterns.
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* new-exceptions/bspsupport/README: added more information
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* new-exceptions/bspsupport/ppc_exc_asm_macros.h,
new-exceptions/bspsupport/ppc_exc.S,
new-exceptions/bspsupport/README,
new-exceptions/bspsupport/ppc_exc_hdl.c:
Thomas Doerfler clarified (thanks!) that raising an
exception and executing the 1st instruction is not
an atomical operation. I added a fix to the code that
checks if a lower-priority interrupt is under way:
we now not only test if the 'lock' variable was set
but also check if the interrupted PC points to the
'write lock' instruction.
Added more comments and updated README.
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* Makefile.am, new-exceptions/bspsupport/README:
provide new irq_bspsupport.rel which was
split out of exc_bspsupport.rel to provide finer-grained
control over what BSPs want to use.
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* new-exceptions/bspsupport/README,
new-exceptions/bspsupport/ppc_exc_bspsupp.h
new-exceptions/bspsupport/vectors_init.c:
added crude test to make sure MMU maps memory as
write-back enabled.
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* new-exceptions/bspsupport/ppc_exc_test.c,
new-exceptions/bspsupport/vectors_init.c,
new-exceptions/bspsupport/ppc_exc_bspsupp.h,
new-exceptions/bspsupport/README,
new-exceptions/bspsupport/irq_supp.h:
Added README and some comments; now use TRAP exception
in ppc_exc_test.c so that it works on PSIM.
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