[POWERPC] 8xx: Move softemu8xx.c from arch/ppc
Previously, Soft_emulate_8xx was called with no implementation, resulting in
build failures whenever building 8xx without math emulation. The
implementation is copied from arch/ppc to resolve this issue.
However, this sort of minimal emulation is not a very good idea other than
for compatibility with existing userspaces, as it's less efficient than
soft-float and can mislead users into believing they have soft-float. Thus,
it is made a configurable option, off by default.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 5a49eab..2f1857c 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -906,7 +906,9 @@
{
extern int do_mathemu(struct pt_regs *);
extern int Soft_emulate_8xx(struct pt_regs *);
+#if defined(CONFIG_MATH_EMULATION) || defined(CONFIG_8XX_MINIMAL_FPEMU)
int errcode;
+#endif
CHECK_FULL_REGS(regs);
@@ -936,7 +938,7 @@
return;
}
-#else
+#elif defined(CONFIG_8XX_MINIMAL_FPEMU)
errcode = Soft_emulate_8xx(regs);
switch (errcode) {
case 0:
@@ -949,6 +951,8 @@
_exception(SIGSEGV, regs, SEGV_MAPERR, regs->nip);
return;
}
+#else
+ _exception(SIGILL, regs, ILL_ILLOPC, regs->nip);
#endif
}
#endif /* CONFIG_8xx */