diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/support/new_exception_processing/cpu.c')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/support/new_exception_processing/cpu.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/c/src/lib/libbsp/powerpc/support/new_exception_processing/cpu.c b/c/src/lib/libbsp/powerpc/support/new_exception_processing/cpu.c index 10d38fab1a..01c5a31e37 100644 --- a/c/src/lib/libbsp/powerpc/support/new_exception_processing/cpu.c +++ b/c/src/lib/libbsp/powerpc/support/new_exception_processing/cpu.c @@ -93,8 +93,20 @@ void _CPU_Context_Initialize( * time (7 July 1997), this restructuring is not being done. */ - /*if ( is_fp ) */ + /* Till Straumann: For deferred FPContext save/restore, make sure integer + * tasks have no FPU access in order to catch violations. + * Otherwise, the FP registers may be corrupted. + * Since we set the_contex->msr using our current MSR, + * we must make sure MSR_FP is off if (!is_fp)... + */ +#if defined(CPU_USE_DEFERRED_FP_SWITCH) && (CPU_USE_DEFERRED_FP_SWITCH==TRUE) + if ( is_fp ) +#endif the_context->msr |= PPC_MSR_FP; +#if defined(CPU_USE_DEFERRED_FP_SWITCH) && (CPU_USE_DEFERRED_FP_SWITCH==TRUE) + else + the_context->msr &= ~PPC_MSR_FP; +#endif the_context->pc = (unsigned32)entry_point; } |