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| author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1998-10-01 18:50:43 +0000 |
|---|---|---|
| committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1998-10-01 18:50:43 +0000 |
| commit | 086836e10e022ccb1da931a975a307c7f326b14a (patch) | |
| tree | 92b5d3d2d8f0705762166654b10d6fa71669fdd6 /c/src/exec/score/cpu/powerpc/ppc.h | |
| parent | Regenerated. (diff) | |
| download | rtems-086836e10e022ccb1da931a975a307c7f326b14a.tar.bz2 | |
Patch from Thomas Doerfler <td@imd.m.isar.de> to improve 403 support.
- c/src/exec/score/cpu/powerpc/ppc.h: some small changes
(added ppc403 characteristics like a exception vector prefix
register, some special register definitions). I am quite sure, they
are compatible with the existing sources, although I did not check
- c/src/exec/score/cpu/powerpc/cpu.c: There is one severe
limitation in the exception entries: Due to the current code
arrangement, the "branch absolute" to the ISR handler may only
jump to the first 128MByte or the last 128MByte of the 4GByte
address range. When the ppc403 is running out of ROM, the ROM
functions are located in the last 128MByte (0xFFF00000 and up).
These addresses were not handled correctly (sign reduced) in
"install_raw_handler". The change I added should work on existing
ppc BSPs aswell...
Diffstat (limited to '')
| -rw-r--r-- | c/src/exec/score/cpu/powerpc/ppc.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/c/src/exec/score/cpu/powerpc/ppc.h b/c/src/exec/score/cpu/powerpc/ppc.h index 56fd820709..a4b091c430 100644 --- a/c/src/exec/score/cpu/powerpc/ppc.h +++ b/c/src/exec/score/cpu/powerpc/ppc.h @@ -112,6 +112,7 @@ extern "C" { #define PPC_DEBUG_MODEL PPC_DEBUG_MODEL_IBM4xx #define PPC_HAS_EXCEPTION_PREFIX 0 +#define PPC_HAS_EVPR 1 #elif defined(ppc601) /* @@ -287,6 +288,15 @@ extern "C" { #endif /* + * Unless otherwise specified, assume the model does NOT have + * 403 style EVPR register to set the exception address prefix. + */ + +#ifndef PPC_HAS_EVPR +#define PPC_HAS_EVPR 0 +#endif + +/* * If no low power mode model was specified, then assume there is none. */ |