Date: Sun, 10 Jan 2021 23:41:33 +0200 From: Konstantin Belousov <kostikbel@gmail.com> To: Jessica Clarke <jrtc27@freebsd.org> Cc: Mitchell Horne <mhorne@freebsd.org>, "src-committers@freebsd.org" <src-committers@freebsd.org>, "dev-commits-src-all@freebsd.org" <dev-commits-src-all@freebsd.org>, "dev-commits-src-main@freebsd.org" <dev-commits-src-main@freebsd.org> Subject: Re: git: facdd1cd2045 - main - cgem: add 64-bit support Message-ID: <X/t0jZIB8rUF1yYH@kib.kiev.ua> In-Reply-To: <51C7F0DA-0EA2-45EF-A817-53984205C648@freebsd.org> References: <202101102053.10AKrGqv070360@gitrepo.freebsd.org> <B11437E6-5865-460B-92A0-62D82F2BBEFC@freebsd.org> <X/tyGljg0gdzab2K@kib.kiev.ua> <51C7F0DA-0EA2-45EF-A817-53984205C648@freebsd.org>
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On Sun, Jan 10, 2021 at 09:33:16PM +0000, Jessica Clarke wrote:
> On 10 Jan 2021, at 21:31, Konstantin Belousov <kostikbel@gmail.com> wrote:
> > On Sun, Jan 10, 2021 at 09:17:48PM +0000, Jessica Clarke wrote:
> >> On 10 Jan 2021, at 20:53, Mitchell Horne <mhorne@FreeBSD.org> wrote:
> >>> diff --git a/sys/dev/cadence/if_cgem.c b/sys/dev/cadence/if_cgem.c
> >>> index 3c5277452469..77337e977dcc 100644
> >>> --- a/sys/dev/cadence/if_cgem.c
> >>> +++ b/sys/dev/cadence/if_cgem.c
> >>> @@ -77,6 +77,14 @@ __FBSDID("$FreeBSD$");
> >>> #include <dev/mii/mii.h>
> >>> #include <dev/mii/miivar.h>
> >>>
> >>> +#ifdef EXT_RESOURCES
> >>> +#include <dev/extres/clk/clk.h>
> >>> +#endif
> >>> +
> >>> +#if INTPTR_MAX == INT64_MAX
> >>> +#define CGEM64
> >>> +#endif
> >>
> >> This isn't going to work with CHERI. Perhaps a BUS_SPACE_MAXADDR check,
> >> or SIZE_MAX? The former is probably preferable for PAE systems.
> >
> > Wouldn't it be spelled as __LP64__ ?
>
> It shouldn't be, because the P stands for pointer(s), which we make
> 128-bit, though in practice for compatibility we have a hack to define
> it anyway (but the compiler *won't*, it's in bsd.cpu.mk or similar).
> Only the integer addresses are 128-bit.
I have no idea about CHERI, I mean how this statement should be handled
for FreeBSD.
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