Flush cpu caches

[adr]

On Tue, 9 Jul 2019, Ian Lepore wrote:

> Date: Tue, 09 Jul 2019 11:20:23 -0600
> From: Ian Lepore <ian at freebsd.org>
> To: adr <adr at SDF.ORG>, freebsd-arm at freebsd.org
> Subject: Re: Flush cpu caches
> 
> On Tue, 2019-07-09 at 16:54 +0000, adr wrote:
>> First of all, hello everyone.
>>
>> I'm completely new to FreeBSD (not to BSD). I need to use
>> something like arm_sync_icache(2) on OpenBSD and NetBSD.
>>
>> I'd find what I think I need in machine/cpufunc.h, but the linker
>> can't find any function symbol. I suppose I have to pass a lib to
>> the linker, but no idea which one.
>>
>> Some help?
>>
>> Thanks in advance,
>> adr.
>>
>
> Hmmm, we have a prototype for arm_sync_icache() but no library function
> for it.  I'll make a note to look into that asap.
>
> Until I figure out how to add it properly, you could implement it
> locally like this:
>
>    #include <machine/sysarch.h>
>
>    void arm_sync_icache(u_int addr, int len)
>    {
>        struct arm_sync_icache_args arg;
>
>        arg.addr = (uintptr_t)addr;
>        arg.len = (uintptr_t)len;
>
>        sysarch(ARM_SYNC_ICACHE, &arg);
>    }
>
> -- Ian
>
>

ARM_SYNC_ICACHE

Thanks a lot, that is all I need.

I'll try to not be a pain in the *.

adr.