Hi, Alex,
On 06/29/2021 08:26 PM, Alex Bennée wrote:
>
> Song Gao <gaos...@loongson.cn> writes:
>
>> Hi, Philippe,
>>
>> On 06/29/2021 02:46 AM, Philippe Mathieu-Daudé wrote:
>>> On 6/28/21 2:04 PM, Song Gao wrote:
>>>> This patch add main translation routines and
>>>> basic functions for translation.
>>>>
>>>> Signed-off-by: Song Gao <gaos...@loongson.cn>
>>>> ---
>>>> target/loongarch/helper.h | 10 +
>>>> target/loongarch/op_helper.c | 28 +++
>>>> target/loongarch/translate.c | 537
>>>> +++++++++++++++++++++++++++++++++++++++++++
>>>> target/loongarch/translate.h | 58 +++++
>>>> 4 files changed, 633 insertions(+)
>>>> create mode 100644 target/loongarch/helper.h
>>>> create mode 100644 target/loongarch/op_helper.c
>>>> create mode 100644 target/loongarch/translate.c
>>>> create mode 100644 target/loongarch/translate.h
>>>
>>>> +/* 128 and 256 msa vector instructions are not supported yet */
>>>> +static bool decode_lsx(uint32_t opcode)
>>>> +{
>>>> + uint32_t value = (opcode & 0xff000000);
>>>> +
>>>> + if ((opcode & 0xf0000000) == 0x70000000) {
>>>> + return true;
>>>> + } else if ((opcode & 0xfff00000) == 0x38400000) {
>>>> + return true;
>>>> + } else {
>>>> + switch (value) {
>>>> + case 0x09000000:
>>>> + case 0x0a000000:
>>>> + case 0x0e000000:
>>>> + case 0x0f000000:
>>>> + case 0x2c000000:
>>>> + case 0x30000000:
>>>> + case 0x31000000:
>>>> + case 0x32000000:
>>>> + case 0x33000000:
>>>> + return true;
>>>> + }
>>>> + }
>>>> + return false;
>>>> +}
>>>
>>> Why not generate that with the decodetree script?
>>>
>> These instructions are privileged instructions， user mode does not need
>> these instructions.
>> I'll delete these codes.
>
> Are you intending to include system emulation in due course?
>
Yes, After the loongarch kernel is submitted to the mainline, we will add
system emulation support.
You can see the lastest loongarch kernel at:
https://github.com/loongson/linux/tree/loongarch-next
thanks
