Date: Thu, 22 Jan 2015 10:16:15 -0700 From: Warner Losh <imp@bsdimp.com> To: Andrew Turner <andrew@fubar.geek.nz> Cc: freebsd-arm@freebsd.org Subject: Re: interrupt framework Message-ID: <D0428AC8-E748-4CA1-895D-C96EDBC05E76@bsdimp.com> In-Reply-To: <20150122101213.5b0f6aea@bender.lan> References: <CAFHCsPX5kG_v-F-cjpyMQsT_b386eok=mqWW0%2BEUb_4-_1Otnw@mail.gmail.com> <54BA9888.1020303@freebsd.org> <CAFHCsPX-X-OG4jGLbhdH1BVtqorJKUeaVbzabX-%2BUfEM2fhD6A@mail.gmail.com> <54BD3F86.3010901@freebsd.org> <CAFHCsPUqq-o4z9c5_8SYxcefUiFvGADB5FnB5NiQuu6XBrdyng@mail.gmail.com> <54BD9794.4080204@freebsd.org> <CAFHCsPXLvwJ_5FJaeoKSHjbgmtwzSXFtuPr1h=bO1g9tghyDog@mail.gmail.com> <54BE7E6D.6060800@freebsd.org> <FB774FC2-CDF0-4E3F-95B8-59755EA54CCC@bsdimp.com> <20150121180916.110fc8ad@bender.lan> <74044D4B-A841-48E0-88CD-73B659454B86@bsdimp.com> <20150122101213.5b0f6aea@bender.lan>
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> On Jan 22, 2015, at 3:12 AM, Andrew Turner <andrew@fubar.geek.nz> = wrote: >=20 > On Wed, 21 Jan 2015 16:32:47 -0700 > Warner Losh <imp@bsdimp.com> wrote: >>> On Jan 21, 2015, at 11:09 AM, Andrew Turner <andrew@fubar.geek.nz> >>> wrote: >>>=20 >>> On Wed, 21 Jan 2015 10:50:14 -0700 >>> Warner Losh <imp@bsdimp.com> wrote: >>>> =E2=80=9Cusually=E2=80=9D? I thought it was always 100%: We=E2=80=99r= e wither using FDT or >>>> we=E2=80=99re not. Some platforms allow compiling for both (mostly = as a >>>> transition aid to FDT), but I=E2=80=99m not aware of any that would = be a >>>> mix. >>>=20 >>> There may be a case on arm64 to use both fdt and ACPI. In this case >>> it would be used as a transition to add support for ACPI as some >>> hardware may require it. >>=20 >> Speaking of ACPI, will/can arm64 use UEFI? The two seem to be joined >> at the hip these days=E2=80=A6 >=20 > On servers I expect UEFI to be used. For more embedded devices, e.g. > phones or tablets, the boot environment will be less standardised. So it would be useful that any UEFI work from user land be architected = to potentially support arm64? I=E2=80=99m thinking =E2=80=9Cyes=E2=80=9D. Warner
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