linux-kernel - Re: MIPS: bug: gettimeofday syscall broken on CI20 board

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Message-ID: <96b53936-a288-91bc-a14b-a501c5231a03@arm.com>
Date:   Thu, 28 Nov 2019 12:05:33 +0000
From:   Vincenzo Frascino <vincenzo.frascino@....com>
To:     "H. Nikolaus Schaller" <hns@...delico.com>
Cc:     linux-mips@...r.kernel.org, Ralf Baechle <ralf@...ux-mips.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Paul Burton <paul.burton@...s.com>,
        MIPS Creator CI20 Development 
        <mips-creator-ci20-dev@...glegroups.com>,
        Discussions about the Letux Kernel 
        <letux-kernel@...nphoenux.org>
Subject: Re: MIPS: bug: gettimeofday syscall broken on CI20 board

Hi Nikolaus,

On 27/11/2019 14:29, H. Nikolaus Schaller wrote:
> Hi Vincenco,
> 
[...]

>>
>> a) with 5.4 kernel
>>

Could you please report the hash of your top commit?

[...]

> 
> root@...ux:~# ./gettime 
> r = -1 errno=1
> tv.sec = 1
> tv.usec = 1
> rt = 1478193516 errno=1
> t = 1478193516
> root@...ux:~# 
> 

On arm64 the output of your application is what follows:

r = 0 errno=0
tv.sec = 1574942449
tv.usec = 348684
rt = 1574942449 errno=0
t = 1574942449

Which seems what it is expected.

On a previous email you mentioned what follows:

root@...ux:~# cat /proc/cpuinfo
system type             : JZ4780
machine                 : img,ci20
processor               : 0
cpu model               : Ingenic JZRISC V4.15  FPU V0.0
BogoMIPS                : 1196.85
wait instruction        : yes
microsecond timers      : no
tlb_entries             : 32
extra interrupt vector  : yes
hardware watchpoint     : yes, count: 1, address/irw mask: [0x0fff]
isa                     : mips1 mips2 mips32r1 mips32r2
ASEs implemented        :
shadow register sets    : 1
kscratch registers      : 0
package                 : 0
core                    : 0
VCED exceptions         : not available
VCEI exceptions         : not available

I am not familiar with JZ4780, which HW clock is it using? (R4K, GIC or NONE)?

-- 
Regards,
Vincenzo

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