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| author | David Daney <david.daney@cavium.com> | 2014-05-28 23:52:04 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-05-30 21:01:09 +0200 |
| commit | a36d8225bceba4b7be47ade34d175945f85cffbc (patch) | |
| tree | e410a514298003ab96d3a10cf091c518a8a423c8 /arch/mips/kernel/branch.c | |
| parent | dadaa1c2c0eddc09d11d7494b040c3f331ecd98f (diff) | |
| download | linux-a36d8225bceba4b7be47ade34d175945f85cffbc.tar.gz linux-a36d8225bceba4b7be47ade34d175945f85cffbc.tar.xz | |
MIPS: OCTEON: Enable use of FPU
Some versions of the assembler will not assemble CFC1 for OCTEON, so
override the ISA for these.
Add r4k_fpu.o to handle low level FPU initialization.
Modify octeon_switch.S to save the FPU registers. And include
r4k_switch.S to pick up more FPU support.
Get rid of "#define cpu_has_fpu 0"
Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Andreas Herrmann <andreas.herrmann@caviumnetworks.com>
Cc: linux-mips@linux-mips.org
Cc: James Hogan <james.hogan@imgtec.com>
Cc: kvm@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/7006/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/branch.c')
| -rw-r--r-- | arch/mips/kernel/branch.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/mips/kernel/branch.c b/arch/mips/kernel/branch.c index 84888d9332b9..e198d9bf17bb 100644 --- a/arch/mips/kernel/branch.c +++ b/arch/mips/kernel/branch.c @@ -562,7 +562,11 @@ int __compute_return_epc_for_insn(struct pt_regs *regs, case cop1_op: preempt_disable(); if (is_fpu_owner()) - asm volatile("cfc1\t%0,$31" : "=r" (fcr31)); + asm volatile( + ".set push\n" + "\t.set mips1\n" + "\tcfc1\t%0,$31\n" + "\t.set pop" : "=r" (fcr31)); else fcr31 = current->thread.fpu.fcr31; preempt_enable(); |