MFC EFI support for the installer

r264978 (nwhitehorn):

    Add EFI support to the installer. This requires that the kernel
    provide a sysctl to determine what firmware is in use. This sysctl
    does not exist yet, so the following blocks are in front of the
    wheels:
    - I've provisionally called this "hw.platform" after the equivalent
      thing on PPC
    - The logic to check the sysctl is short-circuited to always choose
      BIOS.  There's a comment in the top of the file about how to turn
      this off.

    If IA64 acquired a boot1.efifat-like thing (probably with very few
    modifications), the same code could be adapted there.

r265016 (nwhitehorn):

    Finish connecting up installer UEFI support. If the kernel was
    booted using EFI, set up the disks for an EFI system. If booted from
    BIOS/CSM, set up for BIOS.

r268256 (nwhitehorn):

    After EFI support was added to the installer, it needed to allow
    boot partitions of types other than "freebsd-boot" (in particular,
    "efi").  This allows the removal of some nasty hacks for supporting
    PowerPC systems, in particular aliasing freebsd-boot to apple-boot
    on APM and an IBM-specific code on MBR.

    This changes the installer to use the correct names, which also
    breaks a degeneracy in the meaning of "freebsd-boot" that allows the
    addition of support for some newer IBM systems that can boot from
    GPT in addition to MBR. Since I have no idea how to detect which
    those systems are, leave the default on IBM PPC systems as MBR for
    now.

Approved by:	re
PR:		193658
Relnotes:	Yes

1 files changed, 19 insertions, 1 deletions

diff --git a/sbin/geom/class/part/gpart.8 b/sbin/geom/class/part/gpart.8
index 2a4075c..d1a397e 100644
--- a/sbin/geom/class/part/gpart.8
+++ b/sbin/geom/class/part/gpart.8
@@ -574,6 +574,16 @@ Symbolic names currently understood and used by
 .Fx
 are:
 .Bl -tag -width ".Cm dragonfly-disklabel64"
+.It Cm apple-boot
+The system partition dedicated to storing boot loaders on some Apple
+systems.
+The scheme-specific types are
+.Qq Li "!171"
+for MBR,
+.Qq Li "!Apple_Bootstrap"
+for APM, and
+.Qq Li "!426f6f74-0000-11aa-aa11-00306543ecac"
+for GPT.
 .It Cm bios-boot
 The system partition dedicated to second stage of the boot loader program.
 Usually it is used by the GRUB 2 loader for GPT partitioning schemes.
@@ -844,6 +854,14 @@ A partition that contains a NTFS or exFAT filesystem.
 The scheme-specific type is
 .Qq Li "!7"
 for MBR.
+.It Cm prep-boot
+The system partition dedicated to storing boot loaders on some PowerPC systems,
+notably those made by IBM.
+The scheme-specific types are
+.Qq Li "!65"
+for MBR and
+.Qq Li "!0x9e1a2d38-c612-4316-aa26-8b49521e5a8b"
+for GPT.
 .It Cm vmware-vmfs
 A partition that contains a VMware File System (VMFS).
 The scheme-specific types are
@@ -1039,7 +1057,7 @@ Instead, the 800 KBytes bootstrap code image
 should be written with the
 .Cm gpart bootcode
 command to a partition of type
-.Cm freebsd-boot ,
+.Cm apple-boot ,
 which should also be 800 KB in size.
 .Sh OPERATIONAL FLAGS
 Actions other than the