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| author | Maciej W. Rozycki <macro@linux-mips.org> | 2015-04-03 23:27:48 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2015-04-08 01:10:37 +0200 |
| commit | 9b26616c8d9dae53fbac7f7cb2c6dd1308102976 (patch) | |
| tree | d4249bd953d4fa955cecd1283cc0f518df83f8a2 /arch/mips/include/asm/cpu-info.h | |
| parent | 232b6ec5df874236166fb0167cd473601a631715 (diff) | |
| download | blackbird-op-linux-9b26616c8d9dae53fbac7f7cb2c6dd1308102976.tar.gz blackbird-op-linux-9b26616c8d9dae53fbac7f7cb2c6dd1308102976.zip | |
MIPS: Respect the ISA level in FCSR handling
Define the central place the default FCSR value is set from, initialised
in `cpu_probe'. Determine the FCSR mask applied to values written to
the register with CTC1 in the full emulation mode and via ptrace(2),
according to the ISA level of processor hardware or the writability of
bits 31:18 if actual FPU hardware is used.
Software may rely on FCSR bits whose functions our emulator does not
implement, so it should not allow them to be set or software may get
confused. For ptrace(2) it's just sanity.
[ralf@linux-mips.org: Fixed double inclusion of <asm/current.h>.]
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9711/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/cpu-info.h')
| -rw-r--r-- | arch/mips/include/asm/cpu-info.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/mips/include/asm/cpu-info.h b/arch/mips/include/asm/cpu-info.h index c3f4f2d2e108..e7dc785a91ca 100644 --- a/arch/mips/include/asm/cpu-info.h +++ b/arch/mips/include/asm/cpu-info.h @@ -49,6 +49,8 @@ struct cpuinfo_mips { unsigned int udelay_val; unsigned int processor_id; unsigned int fpu_id; + unsigned int fpu_csr31; + unsigned int fpu_msk31; unsigned int msa_id; unsigned int cputype; int isa_level; |
