Commit graph

37615 commits

Author SHA1 Message Date
Robert P. J. Day
367d789d87 MARVELL: Delete now-superfluous board/Marvell/{common, include} dirs.
With dropping support for some boards and the deletion of some source
files, it appears that both of these directories are now superfluous.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
2016-05-27 15:39:55 -04:00
Simon Glass
2507854e46 Drop HAVE_GENERIC_BOARD and SYS_GENERIC_BOARD options
These are no longer used. The migration is complete. Drop these options.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Angelo Dureghello <angelo@sysam.it>
Acked-by: Andreas Bießmann <andreas@biessmann.org>
2016-05-27 15:39:55 -04:00
Simon Glass
4c794525d5 Drop references to CONFIG_SYS_GENERIC_BOARD in config files
This option is no longer used so need not be enabled.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-05-27 15:39:54 -04:00
Simon Glass
9be2e790eb Drop use of CONFIG_SYS_GENERIC_BOARD in U-Boot
This option is always enabled and is about to be removed. Drop references
to it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Andreas Bießmann <andreas@biessmann.org>
2016-05-27 15:39:54 -04:00
Simon Glass
14c67ebaef powerpc: Drop unused code related to generic board
Since generic board init is enabled, this is not used. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-05-27 15:39:54 -04:00
Simon Glass
3e085c9946 mips: Drop unused code in u-boot.h
Since generic board init is enabled, this is not used. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-05-27 15:39:53 -04:00
Simon Glass
b977fefcf7 m68k: Drop unused code in u-boot.h
Since generic board init is enabled, this is not used. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Angelo Dureghello <angelo@sysam.it>
2016-05-27 15:39:53 -04:00
Simon Glass
1c29a382e1 avr32: Drop unused code in u-boot.h
Since generic board init is enabled, this is not used. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Andreas Bießmann <andreas@biessmann.org>
2016-05-27 15:39:52 -04:00
Simon Glass
b61e90e6fd sh: Drop the arch-specific board init
It is well past the deadline for conversion to generic board init. Remove
the old code.

Please test this and perhaps send a follow-up patch if needed.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-05-27 15:39:52 -04:00
Simon Glass
f41e6088eb sh: Fix build errors for generic board
This includes the following fixes:
- Define needed __init_end symbol - see initr_reloc_global_data()
- Drop SH-specific struct bd_info
- Add an empty relocate_code() function

This prevents build errors with generic board, but the code will still need
work. Perhaps this is a better alternative than deleting the code.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-05-27 15:39:51 -04:00
Simon Glass
b0b359536e board_f: Don't require CONFIG_SYS_MONITOR_BASE
Allow this to be unset, such that gd->mon_len is invalid. This seems to be
what the sh architecture does.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-05-27 15:39:51 -04:00
Simon Glass
89b199c3d4 Remove/update old generic-board documentation and warning
Remove the warning from the Makefile, since boards that do not use generic
board will no longer build. Also update documentation.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Andreas Bießmann <andreas@biessmann.org>
2016-05-27 15:39:50 -04:00
Simon Glass
feee28f7d7 openrisc: Drop the arch-specific board init
It is well past the deadline for conversion to generic board init. Remove
the old code.

Stefan, can you test this please and perhaps send a follow-up patch if needed?

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-05-27 15:39:50 -04:00
Roger Quadros
3ac8d1ee12 usb: dwc3: Makefile: Don't build gadget code if USB_GADGET is disabled
It is pointless to build gadget driver if USB_GADGET is disabled.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Acked-by: Marek Vasut <marex@denx.de>
2016-05-27 15:39:49 -04:00
Alexander Graf
bc6fc28b86 net: Optionally use pxe client arch from variable
The client architecture that we pass to a dhcp server depends on the target
payload that we want to execute. An EFI binary has a different client arch
than a legacy binary or a u-boot binary.

So let's parameterize the pxe client arch field to allow an override via
the distro script, so that our efi boot path can tell the dhcp server that
it's actually an efi firmware.

Signed-off-by: Alexander Graf <agraf@suse.de>
2016-05-27 15:39:49 -04:00
Alexander Graf
6a6187efd2 efi_loader: Select bounce buffers for known-bad boards
We know for certain that we have 32bit DMA hardware, but 64bit addresses
on LS2085A and ZynqMP, so let's enable EFI bounce buffers for all defconfigs
on these SoCs.

Signed-off-by: Alexander Graf <agraf@suse.de>
2016-05-27 15:39:49 -04:00
Alexander Graf
51735ae0ea efi_loader: Add bounce buffer support
Some hardware that is supported by U-Boot can not handle DMA above 32bits.
For these systems, we need to come up with a way to expose the disk interface
in a safe way.

This patch implements EFI specific bounce buffers. For non-EFI cases, this
apparently was no issue so far, since we can just define our environment
variables conveniently.

Signed-off-by: Alexander Graf <agraf@suse.de>
2016-05-27 15:39:48 -04:00
Lukasz Majewski
851bda8148 cosmetic: debug: Replace #ifdef DEBUG with debug() macro
Replace #ifdef DEBUG with dedicated debug() macro.

Signed-off-by: Lukasz Majewski <l.majewski@majess.pl>
2016-05-27 15:39:48 -04:00
Beniamino Galvani
c7757d4695 arm: meson: implement calls to secure monitor
Implement calls to secure monitor to read the MAC address from e-fuse.

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
2016-05-27 15:39:47 -04:00
Beniamino Galvani
bfcef28ae4 arm: add initial support for Amlogic Meson and ODROID-C2
This adds platform code for the Amlogic Meson GXBaby (S905) SoC and a
board definition for ODROID-C2. This initial submission only supports
UART and Ethernet (through the existing Designware driver). DTS files
are the ones submitted to Linux arm-soc for 4.7 [1].

[1] https://patchwork.ozlabs.org/patch/603583/

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-05-27 15:39:47 -04:00
Beniamino Galvani
0e1a3e30de net: designware: fix descriptor layout and warnings on 64-bit archs
All members of the DMA descriptor must be 32-bit, even on 64-bit
architectures: change the type to u32 to ensure this. Also, fix
other warnings.

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
[trini: Use phys_addr_t not unsigned long long to test that we're within
DMA'able memory]
Signed-off-by: Tom Rini <trini@konsulko.com>
2016-05-27 15:39:46 -04:00
Beniamino Galvani
5a07abb370 arm: implement generic PSCI reset call for armv8
Add a psci_system_reset() which calls the SYSTEM_RESET function of
PSCI 0.2 and can be used by boards that support it to implement
reset_cpu().

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-05-27 15:39:46 -04:00
Alexander Graf
20898ea934 distro: Add efi pxe boot code
Now that we can expose network functionality to EFI applications,
the logical next step is to load them via pxe to execute them as
well.

This patch adds the necessary bits to the distro script to automatically
load and execute EFI payloads. It identifies the dhcp client as a uEFI
capable PXE client, hoping the server returns a tftp path to a workable
EFI binary that we can then execute.

To enable boards that don't come with a working device tree preloaded,
this patch also adds support to load a device tree from the /dtb directory
on the remote tftp server.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
2016-05-27 15:39:45 -04:00
Alexander Graf
210be5c4cb net: Move CONFIG_SPL_NET_VCI_STRING into Kconfig
This patch also adds the SPL time VCI string into Kconfig.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
2016-05-27 15:39:45 -04:00
Alexander Graf
fa96f37ec5 net: Fix client identifiers for ARM
There are client identifiers specifically reserved for ARM U-Boot
according to http://www.ietf.org/assignments/dhcpv6-parameters/dhcpv6-parameters.xml#processor-architecture.

So let's actually make use of them rather than the bogus 0x100 that
we emitted so far.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
[trini: Drop the Xilinx define to 0x100 as it's not the correct value to
use].
Signed-off-by: Tom Rini <trini@konsulko.com>
2016-05-27 15:37:16 -04:00
Alexander Graf
0dac6b4e85 net: Move the VCI and client arch values to Kconfig
We have a bunch of boards that define their vendor class identifier and
client archs in the board files or in the distro config. Move everything
to the generic Kconfig options.

We're missing the distinction between i386 and x86_64, as I couldn't find
any config variable that would tell us the difference. Is that really important
to people? I guess not, so I left it out.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
2016-05-27 10:01:12 -04:00
Alexander Graf
4570a993d5 bootp: Move vendor class identifier set to function
Both the dhcp as well as the bootp case add vendor class identifier
parameters into their packets. Let's move that into a separate function
to make overlaying easier.

Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
2016-05-27 10:01:11 -04:00
Alexander Graf
0efe1bcf5c efi_loader: Add network access support
We can now successfully boot EFI applications from disk, but users
may want to also run them from a PXE setup.

This patch implements rudimentary network support, allowing a payload
to send and receive network packets.

With this patch, I was able to successfully run grub2 with network
access inside of QEMU's -M xlnx-ep108.

Signed-off-by: Alexander Graf <agraf@suse.de>
2016-05-27 10:01:10 -04:00
Heiko Schocher
7e6621a1ca test/py: fix NameError exception if bdi cmd is not supported
test/py raises an error, if a board has not enabled bdi command

>           pytest.skip('bdinfo command not supported')
E           NameError: global name 'pytest' is not defined

import pytest in test/py/u_boot_utils.py fixes this.

Signed-off-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
2016-05-27 10:01:09 -04:00
Kunihiko Hayashi
dafd64888c cmd: replace the cast of the memory access to a fixed bit type in itest
This patch fixes a bug that long word(.l) memory access in 'itest'
command reads the 8bytes of the actual memory on 64-bit architecture.
The cast to the memory pointer should use a fixed bit type.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-05-27 10:01:07 -04:00
Patrick Delaunay
a565386762 disk: part_efi: fix check of the max partition size
the last value acceptable value for offset is last_usable_lba + 1
and not last_usable_lba - 1

issue found with SDCARD partition commands on u-boot 2015.10
but this part of code don't change

1- create GPT partion on all the card
  > gpt write mmc 0 name=test,start=0,size=0
  > part list mmc 0

Partition Map for MMC device 0  --   Partition Type: EFI

Part      Start LBA          End LBA                       Name
            Attributes
            Type GUID
            Partition GUID
  1        0x00000022       0x003a9fde       "test"
            attrs:     0x0000000000000000
            type:     ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
            type:     data
            guid:     b710eb04-45b9-e94a-8d0b-21458d596f54

=> Start = 0x22*512 = 0x4400
=> Size = (0x003a9fde-0x22+1) * 512  = 0x753F7A00

2- try to recreate the same partition with the next command
   (block size:512 bytes = 0x200)

  > gpt write mmc 0 name=test,start=0x4400,size=0x753F7A00
    Writing GPT: Partitions layout exceds disk size

  > gpt write mmc 0 name=test,start=0x4400,size=0x753F7800
    Writing GPT: Partitions layout exceds disk size

  > gpt write mmc 0 name=test,start=0x4400,size=0x753F7600
    Writing GPT: success!

Partition Map for MMC device 0  --   Partition Type: EFI

Part      Start LBA          End LBA                       Name
            Attributes
            Type GUID
            Partition GUID
  1        0x00000022       0x003a9fdc       "test"
            attrs:     0x0000000000000000
            type:     ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
            type:     data
            guid:     36ec30ef-7ca4-cd48-97cd-ea9fb95185d0

the max LBA when the size is indicated (0x003a9fdc) is lower than
when u-boot compute the max allowed value with size=0 (0x003a9fde)

in the code :

     /* partition ending lba */
     if ((i == parts - 1) && (partitions[i].size == 0))
		/* extend the last partition to maximuim */
		gpt_e[i].ending_lba = gpt_h->last_usable_lba;
     else
		gpt_e[i].ending_lba = cpu_to_le64(offset - 1);

so offset = gpt_h->last_usable_lba + 1 is acceptable !
but the test (offset >= last_usable_lba) cause the error

END

Signed-off-by: Patrick Delaunay <patrick.delaunay73@gmail.com>disk: part_efi: fix check of the max partition size
the last value acceptable value for offset is (last_usable_lba + 1)
and not (last_usable_lba - 1)

issue found with SDCARD partition commands on u-boot 2015.10
but this part of code don't change

1- I create GPT partion on all the card (start and size undefined)

  > gpt write mmc 0 name=test,start=0,size=0
  > part list mmc 0

Partition Map for MMC device 0  --   Partition Type: EFI

Part      Start LBA          End LBA                       Name
            Attributes
            Type GUID
            Partition GUID
  1        0x00000022       0x003a9fde       "test"
            attrs:     0x0000000000000000
            type:     ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
            type:     data
            guid:     b710eb04-45b9-e94a-8d0b-21458d596f54

=> Start = 0x22*512 = 0x4400
=> Size = (0x003a9fde-0x22+1) * 512  = 0x753F7A00

2- I try to recreate the same partition with the command gpt write
   and with start and size values (block size:512 bytes = 0x200)

  > gpt write mmc 0 name=test,start=0x4400,size=0x753F7A00
    Writing GPT: Partitions layout exceds disk size

  > gpt write mmc 0 name=test,start=0x4400,size=0x753F7800
    Writing GPT: Partitions layout exceds disk size

  > gpt write mmc 0 name=test,start=0x4400,size=0x753F7600
    Writing GPT: success!

  I check the partition created :

  > part list mmc 0

Partition Map for MMC device 0  --   Partition Type: EFI

Part      Start LBA          End LBA                       Name
            Attributes
            Type GUID
            Partition GUID
  1        0x00000022       0x003a9fdc       "test"
            attrs:     0x0000000000000000
            type:     ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
            type:     data
            guid:     36ec30ef-7ca4-cd48-97cd-ea9fb95185d0

=> but the max LBA when the size is indicated (0x003a9fdc) is lower than
   when u-boot compute the max allowed value with size=0 (0x003a9fde)

3- in the code, just after my patch, line 446

     /* partition ending lba */
     if ((i == parts - 1) && (partitions[i].size == 0))
		/* extend the last partition to maximuim */
		gpt_e[i].ending_lba = gpt_h->last_usable_lba;
     else
		gpt_e[i].ending_lba = cpu_to_le64(offset - 1);

  so offset = gpt_h->last_usable_lba + 1 is acceptable !
  (it the value used when size is 0)

  but today the test (offset >= last_usable_lba) cause the error
  my patch only solve this issue

END

Signed-off-by: Patrick Delaunay <patrick.delaunay73@gmail.com>
2016-05-27 10:01:07 -04:00
Marek Vasut
04681cb3a4 cmd: disk: Fix unused variable warning
If serial support is not compiled into U-Boot, which may be the case
for some SPL builds, the following warning will be generated in disk.c:

cmd/disk.c: In function 'common_diskboot':
cmd/disk.c:16:6: warning: variable 'dev' set but not used [-Wunused-but-set-variable]
  int dev, part;
      ^
The warning is a result of printf() calls being optimized away, and
thus the whole dev variable becomes indeed unused. Mark the variable
as __maybe_unused .

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
2016-05-27 10:01:06 -04:00
Michal Simek
90a7417602 SPL: FIT: Align loading address for header
If bl_len is not aligned it can caused a problem because another code
expects that start is aligned.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-05-27 09:56:20 -04:00
mario.six@gdsys.cc
71db3270db dm: gpio: pca953x: Support PCA953X with 40 GPIOs
A DM driver for PCA953x was recently introduced by Peng Fan, which lacked
support for the 40 GPIO versions.

This patch adds support for these chips.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Peng Fan  <van.freenix@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-05-27 09:56:20 -04:00
Andreas Fenkart
f71cee4bfc tools/env: compute size of usable area only once
for double buffering to work, redundant buffers must have equal size

Signed-off-by: Andreas Fenkart <andreas.fenkart@digitalstrom.com>
2016-05-27 09:56:19 -04:00
Andreas Fenkart
cedb341e7f tools/env: fw_printenv pass value_only as argument
Signed-off-by: Andreas Fenkart <andreas.fenkart@digitalstrom.com>
2016-05-27 09:56:19 -04:00
Andreas Fenkart
c3a23e8b5f tools/env: remove 'extern' from function prototype in fw_env.h
checkpatch complains about in succeding patch. Prefer to fix all
declarations in a dedicated patch.

Signed-off-by: Andreas Fenkart <andreas.fenkart@digitalstrom.com>
2016-05-27 09:56:18 -04:00
Andreas Fenkart
dcdc1f6a9b tools/env: pass key as argument to env_aes_cbc_crypt
Signed-off-by: Andreas Fenkart <andreas.fenkart@digitalstrom.com>
2016-05-27 09:56:17 -04:00
Tom Rini
6523dbf7cc Merge branch 'master' of git://git.denx.de/u-boot-mips 2016-05-25 20:22:48 -04:00
Wills Wang
4349b55b99 mips: ath79: ar933x: Avoid warning with gcc5
GCC 5.3 report a warning: 'upper' and 'lower' may be used
uninitialized in this function [-Wmaybe-uninitialized].
Compiler might need explicit initializer.

Signed-off-by: Wills Wang <wills.wang@live.com>
2016-05-26 01:34:14 +02:00
Wills Wang
42a3f3e6eb mips: ath79: ar933x: Fix ethernet PHY mismatch
We need reset the Ethernet Switch analog part before operation,
or the build-in Ethernet PHY don't work.

Signed-off-by: Wills Wang <wills.wang@live.com>
Acked-by: Marek Vasut <marex@denx.de>
2016-05-26 01:34:14 +02:00
Marek Vasut
1ad3a6fb5b mips: Drop JZ4740 remnants
Remove the remnants of JZ4740 support.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Paul Burton <paul.burton@imgtec.com>
2016-05-26 01:34:14 +02:00
Marek Vasut
ecc9d26062 mips: Allow overriding start.S in SPL
Certain chips, like the JZ47xx, have extreme size constraints on the
SPL size and require custom start.S . Allow overriding the start.S
the same way ARM MXS does it.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Paul Burton <paul.burton@imgtec.com>
2016-05-26 01:34:14 +02:00
Paul Burton
ec35e12331 MIPS: Move CONFIG_SYS_TEXT_BASE to Kconfig
Move CONFIG_SYS_TEXT_BASE to Kconfig, and add default values in board
Kconfig files matching what was present in their config headers. This
will make it cleaner to conditionalise the value for Malta based on 32
vs 64 bit builds.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
2016-05-26 01:34:13 +02:00
Paul Burton
6242aa1374 malta: Use device model & tree for UART
Make use of device model & device tree to probe the UART driver. This is
the initial step in bringing Malta up to date with driver model, and
allows for cleaner handling of the different I/O addresses for different
system controllers by specifying the ISA bus address instead of a
translated memory address.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-05-26 01:34:13 +02:00
Paul Burton
2e7eb12e5c malta: Tidy up UART address selection
The address of the UART differs based upon the system controller because
it's actually within the I/O port region, which is in a different
location for each system controller. Rather than handling this as 2
UARTs with the correct one selected at runtime, use I/O port accessors
for the UART such that access to it gets translated into the I/O port
region automatically.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-05-26 01:34:13 +02:00
Paul Burton
df8ec55d52 dm: ns16550: Don't map_physmem for I/O ports
If the UART is to be accessed using I/O port accessors (inb & outb) then
using map_physmem doesn't make sense, since it operates in a different
memory space. Remove the call to map_physmem when
CONFIG_SYS_NS16550_PORT_MAPPED is defined, allowing I/O port addresses
to not be mangled by the incorrect mapping.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-05-26 01:34:13 +02:00
Paul Burton
49717b18be fdt: Document the rest of struct of_bus
Provide some documentation for the fields of struct of_bus, for
consistency with that provided for the new match field.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-05-25 23:13:38 +02:00
Paul Burton
0a222d53d8 fdt: Support for ISA busses
Support ISA busses in much the same way as Linux does. This allows for
ISA bus addresses to be translated, and only if CONFIG_OF_ISA_BUS is
selected in order to avoid including the code in builds which won't need
it.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-05-25 23:13:09 +02:00
Andre Przywara
f9a90ace21 arm64: fix arm64 Linux boot image header field sizes
The arm64 Linux boot protocol [1] describes the fields in the Image
header as being 64-bit little endian values.
So fix the endianess conversion to use 64-bit sized operations, for
both image_size and text_offset.
Also we use a local variable for the image_size to avoid both writing
to the header and also accessing it after we actually unmapped it.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>

[1] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/arm64/booting.txt
2016-05-25 12:52:44 -04:00