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| author | Kumar Gala <galak@kernel.crashing.org> | 2007-02-12 21:27:10 -0600 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2007-02-12 21:27:10 -0600 |
| commit | edacf6bb7e7e1b75f2937966a50119439ff78ccb (patch) | |
| tree | eab09f64b8261379111dc6e3607ef848ea0adc5f /arch/mips/kernel/r4k_fpu.S | |
| parent | 862a7284980d809a583e9a34c774fab84e0a46f8 (diff) | |
| parent | 5986a2ec35836a878350c54af4bd91b1de6abc59 (diff) | |
Merge branch 'master' into 85xx
Diffstat (limited to 'arch/mips/kernel/r4k_fpu.S')
| -rw-r--r-- | arch/mips/kernel/r4k_fpu.S | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/arch/mips/kernel/r4k_fpu.S b/arch/mips/kernel/r4k_fpu.S index 880fa6e841e..59c1577ecbb 100644 --- a/arch/mips/kernel/r4k_fpu.S +++ b/arch/mips/kernel/r4k_fpu.S @@ -114,6 +114,14 @@ LEAF(_save_fp_context32) */ LEAF(_restore_fp_context) EX lw t0, SC_FPC_CSR(a0) + + /* Fail if the CSR has exceptions pending */ + srl t1, t0, 5 + and t1, t0 + andi t1, 0x1f << 7 + bnez t1, fault + nop + #ifdef CONFIG_64BIT EX ldc1 $f1, SC_FPREGS+8(a0) EX ldc1 $f3, SC_FPREGS+24(a0) @@ -157,6 +165,14 @@ LEAF(_restore_fp_context) LEAF(_restore_fp_context32) /* Restore an o32 sigcontext. */ EX lw t0, SC32_FPC_CSR(a0) + + /* Fail if the CSR has exceptions pending */ + srl t1, t0, 5 + and t1, t0 + andi t1, 0x1f << 7 + bnez t1, fault + nop + EX ldc1 $f0, SC32_FPREGS+0(a0) EX ldc1 $f2, SC32_FPREGS+16(a0) EX ldc1 $f4, SC32_FPREGS+32(a0) @@ -177,9 +193,10 @@ LEAF(_restore_fp_context32) jr ra li v0, 0 # success END(_restore_fp_context32) - .set reorder #endif + .set reorder + .type fault@function .ent fault fault: li v0, -EFAULT # failure |