grub-efi-native: Add support for EFI ISO images

The iso9660 file system support needs to be added to grub in order to
be able to correctly find the grub.cfg.  The grub commands to locate
the grub.cfg also needs to be encoded into grub's default
configuration.

This change allows the resulting grub binary to work both in the hard
drive / USB boot case or the optical media boot case.

[YOCTO #4100]

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Reviewed-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
bootimage.bbclass, grub-efi.bbclass: Improve EFI & PCBIOS+EFI ISO support

Using the latest mkisofs it is possible to generate 3 different types
of ISO images, which can be used in various scenarios.

1) PCBIOS Only ISO
   - This option remains unchanged by this commit
   - Uses syslinux menus
   - Can be directly copied with dd to a USB device
   - Can be burned to optical media

2) EFI Only ISO
   - Uses grub 2 menus
   - Can be burned to optical media
   - If you want to use this image on a USB device
     extra steps must be taken in order to format the USB
     device with fat32, and copy an EFI loader which will
     in turn load the iso image

3) PCBIOS / EFI ISO
   - This is a hybrid image ISO that will work for case 1 or 2
     as above with the same restrictions and boot menu types
     depending on what type of firmware is installed on
     the hardware or depending on if EFI or "Legacy Boot" is
     enabled on some UEFI firmwares.

The syslinux.bbclass is now always required because that is where the
isohybrid dependencies come from as well as the configuration data for
the isohybrid.  The isohybrid is the secret sauce which allows the ISO
to work as optical media or as a disk image on USB or a HDD/SSD.

[YOCTO #4100]

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
grub-efi.bbclass: Add serial and graphics menu options

The syslinux.bbclass already has support for automatically generated
serial and graphics menu choices.  This patch adds the same concept to
the grub-efi menu.  That makes it possible to generate a single image
which can boot on a PCBIOS or EFI firmware with consistent looking
boot options.

[YOCTO #4100]

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
syslinux.bbclass: Fix hard coding of console=tty*

The SYSLINUX_SERIAL variable was hard coded and occasionally needs to
be different for the kernel argument vs the syslinux argument.

In the auto-generated boot mode console=tty0 was hard coded, and this
is not needed at all, and causes problems in some cases if a end user
wanted to change the console=... via the kernel boot argument APPEND
mechanism.  The default can be forced with SYSLINUX_DEFAULT_CONSOLE
for systems that need a special specification to enable the frame
buffer instead of a serial port.

[YOCTO #3944]

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
bootimage.bbclass, zisofs-tools-native: add ability to compress ISO images

The mkzftree is needed to allow ISO images to be compressed with
minimal runtime overhead.  Below is an example of the savings on a
core-image-minimal.

Before ls -l:
24117248 core-image-minimal-qemux86-64.iso

Using the mkzftree ls -l:
16777216 core-image-minimal-qemux86-64.iso

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Reviewed-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
syslinux.bbclass, syslinux: Update to syslinux 6.01

A newer version of syslinux is required for an EFI enabled isohybrid.
This is used for the the capability to generate 3 types of ISO images,
all of which can be booted off a USB device or HDD if copied with dd.

1) PC BIOS only ISO
2) EFI only ISO
3) EFI + PC BIOS ISO

The syslinux.bbclass required a minor tweak because a few .c32
libraries require dynamic loading from the created media as of
syslinux 5 and up.  This was a good time to also fix the
duplication of the AUTO_SYSLINUXMENU block.

[YOCTO #4100]

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
boot-directdisk.bbclass: Fix media generation problems with vmdk

The various populate methods need to accept a path as an argument vs
using hard expanded variables.  In the case of the boot-directdisk
class it uses a different path for HDDDIR but it gets eclipsed by the
the class definition at the point in time ${HDDDIR} gets expanded.

The logical fix is to pass the arguments to the functions as opposed
to using globally expanded variables from the class definitions.

This patch changes 3 things:
1) syslinux_hddimg_populate takes an argument for the destination
2) syslinux_iso_populate takes an argument for the destination
3) populate is changed to boot_direct_populate because there
   was a conflict with it overriding the populate in bootimg.bbclass

[YOCTO #3994]

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>