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MIPS: Remove FIR from ISA I FP signal context

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Complement commit e50c0a8fa6 ("Support the MIPS32 / MIPS64 DSP ASE.")
and remove the Floating Point Implementation Register (FIR) from the FP
register set recorded in a signal context with MIPS I processors too, in
line with the change applied to r4k_fpu.S.

The `sc_fpc_eir' slot is unused according to our current ABI and the FIR
register is read-only and always directly accessible from user software.

[ralf@linux-mips.org: This is also required because the next commit depends
on it.]

Signed-off-by: Maciej W. Rozycki <macro@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/14475/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Maciej W. Rozycki 2016-10-31 16:26:24 +00:00 committed by Ralf Baechle
parent 35938a00ba
commit 6daaa3266d
1 changed files with 1 additions and 5 deletions
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6
arch/mips/kernel/r2300_fpu.S
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@ -64,13 +64,9 @@ LEAF(_save_fp_context)
EX(swc1 $f29,(SC_FPREGS+232)(a0))
EX(swc1 $f30,(SC_FPREGS+240)(a0))
EX(swc1 $f31,(SC_FPREGS+248)(a0))
EX(sw t1,(SC_FPC_CSR)(a0))
cfc1 t0,$0 # implementation/version
jr ra
EX(sw t1,(SC_FPC_CSR)(a0))
.set pop
.set nomacro
EX(sw t0,(SC_FPC_EIR)(a0))
.set macro
END(_save_fp_context)
/*