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| author | Maciej W. Rozycki <macro@imgtec.com> | 2016-10-31 16:26:24 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2016-11-04 01:38:50 +0100 |
| commit | 6daaa3266db9cc488612690e42c23b0763e2b49a (patch) | |
| tree | 125b090f45799901b3f64166c1070e231580f10b /arch/mips/kernel/r2300_fpu.S | |
| parent | 35938a00ba86ae7a7404b66b526968ca2b8d3127 (diff) | |
| download | lwn-6daaa3266db9cc488612690e42c23b0763e2b49a.tar.gz lwn-6daaa3266db9cc488612690e42c23b0763e2b49a.zip | |
MIPS: Remove FIR from ISA I FP signal context
Complement commit e50c0a8fa60d ("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>
Diffstat (limited to 'arch/mips/kernel/r2300_fpu.S')
| -rw-r--r-- | arch/mips/kernel/r2300_fpu.S | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/arch/mips/kernel/r2300_fpu.S b/arch/mips/kernel/r2300_fpu.S index c4c8c1b65be9..ce249eae91ce 100644 --- a/arch/mips/kernel/r2300_fpu.S +++ b/arch/mips/kernel/r2300_fpu.S @@ -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) /* |