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[POWERPC] 8xx: Move softemu8xx.c from arch/ppc

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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>
This commit is contained in:
Scott Wood
2007-09-18 15:29:35 -05:00
committed by Kumar Gala
parent c4e05bc57d
commit 5dd57a1308
4 changed files with 220 additions and 1 deletions
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6
arch/powerpc/kernel/traps.c
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@@ -906,7 +906,9 @@ void SoftwareEmulation(struct pt_regs *regs)
{
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 @@ void SoftwareEmulation(struct pt_regs *regs)
return;
}
#else
#elif defined(CONFIG_8XX_MINIMAL_FPEMU)
errcode = Soft_emulate_8xx(regs);
switch (errcode) {
case 0:
@@ -949,6 +951,8 @@ void SoftwareEmulation(struct pt_regs *regs)
_exception(SIGSEGV, regs, SEGV_MAPERR, regs->nip);
return;
}
#else
_exception(SIGILL, regs, ILL_ILLOPC, regs->nip);
#endif
}
#endif /* CONFIG_8xx */