On 10/30/2020 12:00 PM, Jiaxun Yang wrote:
在 2020/10/29 16:02, Tiezhu Yang 写道:
The field LPA of CP0_CONFIG3 register is read only for Loongson64, so
the
write operations are meaningless, remove them.
Signed-off-by: Tiezhu Yang <yangtiezhu@xxxxxxxxxxx>
---
arch/mips/include/asm/mach-loongson64/kernel-entry-init.h | 8 --------
arch/mips/loongson64/numa.c | 3 ---
2 files changed, 11 deletions(-)
Hi Tiezhu,
AFAIK it's not read only on 3A1000.
Have you check with hardware guys?
Hi Jiaxun,
Yes, I checked it before send this patch, the field LPA of CP0_CONFIG3
on 3A1000 is also read only, we can see the related description in the
chapter 3.22 of Loongson_3A1000_cpu_user_2.
And also we can see the following description in the chapter
"9.45 Configuration Register 3 (CP0 Register 16, Select 3)" of
MD00091-2B-MIPS64PRA-AFP-05.04:
"The Config3 register encodes additional capabilities.
All fields in the Config3 register are read-only."
Thanks,
Tiezhu
Thanks.
- Jiaxun
