Flush cpu caches

[Ian Lepore]

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