aboutsummaryrefslogtreecommitdiff
path: root/arch/mips/math-emu
diff options
context:
space:
mode:
authorDavid Daney <david.daney@cavium.com>2014-05-28 23:52:04 +0200
committerRalf Baechle <ralf@linux-mips.org>2014-05-30 21:01:09 +0200
commita36d8225bceba4b7be47ade34d175945f85cffbc (patch)
treee410a514298003ab96d3a10cf091c518a8a423c8 /arch/mips/math-emu
parentdadaa1c2c0eddc09d11d7494b040c3f331ecd98f (diff)
downloadlinux-a36d8225bceba4b7be47ade34d175945f85cffbc.tar.gz
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/math-emu')
-rw-r--r--arch/mips/math-emu/cp1emu.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c
index cdfed285c24..736c17a226e 100644
--- a/arch/mips/math-emu/cp1emu.c
+++ b/arch/mips/math-emu/cp1emu.c
@@ -584,7 +584,11 @@ static int isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn,
if (insn.i_format.rs == bc_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();