This patch makes some slight changes to the exception hook interface.
The old code provides a different handler hook for every exception
type... however, in practice all those hook functions often need to look
very similar, so this creates more boilerplate than it removes. The new
interface just allows for a single hook with the exception type passed
as an argument, and the consumer can signal whether the exception was
handled through the return value. (Right now this still only supports
one consumer, but it could easily be extended to walk through a list of
hooks if the need arises.)
Also move the excepton state from an argument to a global. This avoids a
lot of boilerplate since some consumers need to change the state from
many places, so they would have to pass the same pointer around many
times. It also removes the false suggestion that the exception state was
not global and you could have multiple copies of it (which the exception
core doesn't support for any architecture).
On the ARM side, the exception state is separated from the exception
stack for easier access. (This requires some assembly changes, and I
threw in a few comments and corrected the immediate sigils from '$' to
the official '#' while I'm there.) Since the exception state is now both
stored and loaded through an indirection pointer, this allows for some
very limited reentrance (you could point it to a different struct while
handling an exception, and while you still won't be able to return to
the outer-level exception from there, you could at least swap out the
pointer and return back to System Mode in one go).
BUG=chrome-os-partner:18390
TEST=Made sure normal exceptions still get dumped correctly on both
archs.
Original-Change-Id: I5d9a934fab7c14ccb2c9d7ee4b3465c825521fa2
Original-Signed-off-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/202562
Original-Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
(cherry picked from commit 97542110f0b385b9b8d89675866e65db8ca32aeb)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
*** Squashed to prevent build failures. ***
libpayload: align arm64 with new exception handling model
The exception handling was previously updated, however the
arm64 changes raced with hat one. Make the arm64 align with
the new model. Without these changes compilation will fail.
BUG=None
BRANCH=None
TEST=Can build libpayload for rush.
Original-Change-Id: I320b39a57b985d1f87446ea7757955664f8dba8f
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/204402
Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org>
(cherry picked from commit 0080df41b311ef20f9214b386fa4e38ee54aa1a1)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: I9a0bb3848cf5286f9f4bb08172a9f4a15278348e
Reviewed-on: http://review.coreboot.org/8117
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This adds some assembly code to clear .bss segment. It might have been
already cleared by the loader, but it is not guaranteed. This also
helps when the program is loaded by the debugger.
BUG=none
TEST=observed that .bss is now initialized when the program is
restarted. Verified correct boundaries of the segment.
Original-Change-Id: I0aed0070da53881e4cf8c27049459040c006e765
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/201784
Original-Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Original-Reviewed-by: Trevor Bourget <tbourget@codeaurora.org>
(cherry picked from commit c89ecee5ddfc33a438d4d1926d3756a48f3c2576)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: Ic0c33d2a8ad22cd23b3ccb73c603cb14ae2aab29
Reviewed-on: http://review.coreboot.org/8060
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
ARM processors save the PC value in the Link Register when they handle
and exception, but they store it with an added offset (depending on the
exception type). In order to make crashes easier to read and correctly
support more complicated handlers in libpayload, this patch adjusts the
saved PC value on exception entry to correct for that offset.
(Note: The value that we now store is what ARM calls the "preferred
return address". For most exceptions this is the faulting instruction,
but for software interrupts (SWI) it is the instruction after that. This
is the way most programs like GDB expect the stored PC address to work,
so let's leave it at that.)
Numbers taken from the Architecture Reference Manual at the end of
section B1.8.3.
BRANCH=none
BUG=chrome-os-partner:18390
TEST=Provoked a data abort and an undefined instruction in both coreboot
and depthcharge, confirmed that the PC address was spot on.
Original-Change-Id: Ia958a7edfcd4aa5e04c20148140a6148586935ba
Original-Signed-off-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/199844
Original-Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
Original-Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
(cherry picked from commit 4a914d36bb181d090f75b1414158846d40dc9bac)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: Ib63ca973d5f037a879b4d4d258a4983160b67dd6
Reviewed-on: http://review.coreboot.org/7992
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>
The calling convention of payload entry function is different by architecture.
For example, X86 takes no arguments and ARM needs first param to be a
cb_header_ptr*.
To help payloads load and execute other payloads easily and correctly, we should
provide the selfboot() function in libpayload, using same prototype as defined
in coreboot environment.
BUG=none
TEST=emerge-nyan libpayload # pass
BRANCH=none
Original-Change-Id: I8f1cb2c0df788794b2f6f7f5500a3910328a4f84
Original-Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/199503
Original-Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
(cherry picked from commit 1e916cf021ce68886eb9668982c392eadedc7b7e)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: I7279ef27f49ef581d25a455dd8f1f2f7f1ba58cb
Reviewed-on: http://review.coreboot.org/7907
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
Some EABI conformant toolchains like GCC need additional functions like raise.
To prevent payloads adding arch-specific implementations everywhere, we should
provide the default version in libpayload.
BUG=none
TEST=emerge-nyan libpayload # pass
BRANCH=none
Original-Change-Id: Id1e3c29590aa5881aefd944a7551949ce9a47b8f
Original-Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/199686
(cherry picked from commit 395810c4b744dbb720050f79a2c1a30e81464554)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: I2e1d8c8cb519f8e788c22d081132d23b49b8f822
Reviewed-on: http://review.coreboot.org/7906
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Turns out that when you clear 28 bits starting with bit 3, you leave bit
31 standing. Ooops...
This shouldn't really matter since that bit is reserved/SBZ in CLIDR
anyway, but it's still nice to fix it. This whole thing should really be
an AND for clarity anyway in my opinion.
Bug found in upstream NetBSD (who would've thought...).
BUG=None
TEST=Still boots.
Change-Id: Ic826e82d58fd1ce984971afea3dfa9296f746d9f
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/193300
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Reviewed-by: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit d270c0ec18b74b272451c456cbf07e99d95896cb)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Reviewed-on: http://review.coreboot.org/7745
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
TEST=Booted nyan in normal and recovery mode. Created a map, filled it with some
chars, then verified they can be read from the pointer returned.
BUG=chrome-os-partner:25587
BRANCH=None
Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Tested-by: Daisuke Nojiri <dnojiri@chromium.org>
Original-Change-Id: Id1f1be4f6d2d5734d87bf3452d4806d0fe3fda88
Original-Reviewed-on: https://chromium-review.googlesource.com/188894
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Original-Commit-Queue: Daisuke Nojiri <dnojiri@chromium.org>
Original-Tested-by: Daisuke Nojiri <dnojiri@chromium.org>
(cherry picked from commit 7fda3885f51c8d383585a80e99ab3df9c789d872)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: I6255d11396c87f40b0ae12ceab0fd152f2478529
Reviewed-on: http://review.coreboot.org/7658
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Use the SPSR to extract and inject CPSR values when an exception happens and
pass that information to exception hooks.
The register structure GDB expects when using its remote protocol has a spot
for the CPSR.
BUG=None
TEST=Built and booted on link, nyan.
BRANCH=None
Original-Change-Id: Id950fb09d72fb0f81e4eef2489c0849ce5dd8aca
Original-Signed-off-by: Gabe Black <gabeblack@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/180253
Original-Reviewed-by: Gabe Black <gabeblack@chromium.org>
Original-Tested-by: Gabe Black <gabeblack@chromium.org>
Original-Commit-Queue: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit 8e7014f24a580f84c91fa7b0369dfa922918adcc)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: I49357fb6a65edeff7a9a48d54254308a6b0efdb7
Reviewed-on: http://review.coreboot.org/7657
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
To support a GDB stub, it will be necessary to trap various exceptions which
will be used to implement breakpoints, single stepping, etc.
BUG=None
TEST=Built and booted on Link with hooks installed and saw that they
triggered when exceptions occurred. Built and booted on nyan.
BRANCH=None
Original-Change-Id: Iab659365864a3055159a50b8f6e5c44290d3ba2b
Original-Signed-off-by: Gabe Black <gabeblack@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/179602
Original-Reviewed-by: Gabe Black <gabeblack@chromium.org>
Original-Tested-by: Gabe Black <gabeblack@chromium.org>
Original-Commit-Queue: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit 8db0897b1ddad600e247cb4df147c757a8187626)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: I5e7f724b99988cd259909dd3bd01166fa52317ec
Reviewed-on: http://review.coreboot.org/7656
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
To find the coreboot tables, the payload has historically searched for their
signature in a predefined region of memory. This is a little clumsy on x86,
but it works because you can assume certain regions are RAM. Also, there are
areas which are set aside for the firmware by convention. On x86 there's a
forwarding entry which goes in one of those fairly small conventional areas
and which points to the CBMEM area at the end of memory.
On ARM there aren't areas like that, so we've left out the forwarding entry and
gone directly to CBMEM. RAM may not start at the beginning of the address space
or go to its end, and that means there isn't really anywhere fixed you can put
the coreboot tables. That's meant that libpayload has to be configured on a
per board basis to know where to look for CBMEM.
Now that we have boards that don't have fixed amounts of memory, the location
of the end of RAM isn't fixed even on a per board level which means even that
workaround will no longer cut it.
This change makes coreboot pass the location of the coreboot tables to
libpayload using r0, the first argument register. That means we'll be able to
find them no matter where CBMEM is, and we can get rid of the per board search
ranges.
We can extend this mechanism to x86 as well, but there may be more
complications and it's less necessary there. It would be a good thing to do
eventually though.
BUG=None
TEST=Built and booted on nyan. Changed the size of memory and saw that the
payload could still find the coreboot tables where before it couldn't. Built
for pit, snow, and big.
BRANCH=None
Original-Change-Id: I7218afd999da1662b0db8172fd8125670ceac471
Original-Signed-off-by: Gabe Black <gabeblack@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/185572
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Original-Commit-Queue: Gabe Black <gabeblack@chromium.org>
Original-Tested-by: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit ca88f39c21158b59abe3001f986207a292359cf5)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: Iab14e9502b6ce7a55f0a72e190fa582f89f11a1e
Reviewed-on: http://review.coreboot.org/7655
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
This patch changes the ENTRY() macro in asm.h to create a new section
for every assembler function, thus providing dcache_clean/invalidate_all
and friends with the same --gc-sections goodness that our C functions
have. This requires a few minor changes of moving around data (to make
sure it ends up in the right section) and changing some libgcc functions
(which apparently need to have two names?), but nothing serious.
(You may note that some of our assembly functions have data, sometimes
even writable, within the same .text section. This has been this way
before and I'm not looking to change it for now, although it's not
totally clean. Since we don't enforce read-only sections through paging,
it doesn't really hurt.)
BUG=None
TEST=Nyan and Snow still boot. Confirm dcache_invalidate_all is not
output into any binary anymore since no one actually uses it.
Original-Change-Id: I247b29d6173ba516c8dff59126c93b66f7dc4b8d
Original-Signed-off-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/183891
(cherry picked from commit 4a3f2e45e06cc8592d56c3577f41ff879f10e9cc)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: Ieaa4f2ea9d81c5b9e2b36a772ff9610bdf6446f9
Reviewed-on: http://review.coreboot.org/7451
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>
These drivers are needed right away and never really fit into depthcharge's
driver model anyway.
CQ-DEPEND=CL:194064
BUG=None
TEST=Built and booted nyan, link, and peach_pit and verified that timer values
in cbmem were reasonable. Built for nyan_big, nyan_blaze and daisy.
BRANCH=None
Original-Change-Id: Ia7953cfece57524262a6c7d6537082af7a00f4d6
Original-Signed-off-by: Gabe Black <gabeblack@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/194058
Original-Reviewed-by: Gabe Black <gabeblack@chromium.org>
Original-Commit-Queue: Gabe Black <gabeblack@chromium.org>
Original-Tested-by: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit f30a410f0a248c93bc34f5868af1596bf8ce3cdd)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: I782d20f3cd63210a87c712643c7a53753f5ef301
Reviewed-on: http://review.coreboot.org/7225
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins)
This patch changes several cache-related pieces to be cleaner, faster or
more correct. The largest point is removing the old
arm_invalidate_caches() function and surrounding bootblock code to
initialize SCTLR and replace it with an all-assembly function that takes
care of cache and SCTLR initialization to bring the system to a known
state. It runs without stack and before coreboot makes any write
accesses to be as compatible as possible with whatever state the system
was left in by preceeding code. This also finally fixes the dreaded
icache bug that wasted hundreds of milliseconds during boot.
Old-Change-Id: I7bb4995af8184f6383f8e3b1b870b0662bde8bd4
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/183890
(cherry picked from commit 07a35925dc957919bf88dfc90515971a36e81b97)
nyan_big: apply cache-related changes from nyan
This applies the same changes from 07a3592 that were applied to nyan.
Old-Change-Id: Idcbe85436d7a2f65fcd751954012eb5f4bec0b6c
Reviewed-on: https://chromium-review.googlesource.com/184551
Commit-Queue: David Hendricks <dhendrix@chromium.org>
Tested-by: David Hendricks <dhendrix@chromium.org>
Reviewed-by: David Hendricks <dhendrix@chromium.org>
(cherry picked from commit 4af27f02614da41c611aee2c6d175b1b948428ea)
Squashed the followup patch for nyan_big into the original patch.
Change-Id: Id14aef7846355ea2da496e55da227b635aca409e
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
(cherry picked from commit 4cbf25f8eca3a12bbfec5b015953c0fc2b69c877)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Reviewed-on: http://review.coreboot.org/6993
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This patch switches every last part of Coreboot on ARM over to Thumb
mode: libpayload, the internal libgcc, and assorted assembly files. In
combination with the respective depthcharge patch, this will switch to
Thumb mode right after the entry point of the bootblock and not switch
back to ARM until the final assembly stub that jumps to the kernel.
The required changes to make this work include some new headers and
Makefile flags to handle assembly files (using the unified syntax and
the same helper macros as Linux), modifying our custom-written libgcc
code for 64-bit division to support Thumb (removing some stale old files
that were never really used for clarity), and flipping the general
CFLAGS to Thumb (some more cleanup there as well while I'm at it).
BUG=None
TEST=Snow and Nyan still boot.
Original-Change-Id: I80c04281e3adbf74f9f477486a96b9fafeb455b3
Original-Signed-off-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/182212
Original-Reviewed-by: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit 5f65c17cbfae165a95354146ae79e06c512c2c5a)
Conflicts:
payloads/libpayload/include/arm/arch/asm.h
src/arch/arm/Makefile.inc
src/arch/arm/armv7/Makefile.inc
*** There is an issue with what to do with ramstage-S-ccopts, and
*** will need to be covered in additional ARM cleanup patches.
Change-Id: I80c04281e3adbf74f9f477486a96b9fafeb455b3
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Reviewed-on: http://review.coreboot.org/6930
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This patch fixes the remaining few bugs in our shiny new cache iteration
by set/way/level algorithm to actually make it work: It makes it start
from cache level 0 (previously it would always start at LoC and be
"done" instantly), fixes up the two shifts that isolate the set bits at
the end (which didn't seem to account for the fact that the first shift
affects the second), and throws an S bit on that last shift so that it
actually affects the conditionals after it.
In addition, also moves the next_level block to the top so that we can
share (and thus eliminate) some code at initialization, and turns the
whole thing into a thrice-instantiated macro to create functions that
fit our existing interface.
Change-Id: I1338a589cbb37d74ea6e7a3d4f67ff827e24edbe
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/183879
Reviewed-by: Stefan Reinauer <reinauer@google.com>
Reviewed-by: David Hendricks <dhendrix@chromium.org>
(cherry picked from commit 6d94f8330191c316fe093ddb5288329453da8a4b)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6932
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
The memcpy/memset/memmove assembly implementations have been taken from
U-Boot, which originally got them from Linux. I turns out that they are
actually not that bad, but they could use an update. This patch pulls in
the current Linux upstream versions of those files, removing some old
U-Boot cruft such as checking whether the two pointers in a memcpy() are
equal (really now?) or side-stepping the R8 register because it was used
for special purposes. It also returns to the good old Linux
ENTRY/ENDPROC macros since we have them now anyway, and straightens out
the W() macro in preparation for unified thumb support.
Change-Id: I138af269b423bef0a237759ac29f1ee58ca206a0
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/182179
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
(cherry picked from commit 777127997bde5785b21d422d0b6eb04c4328b478)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6918
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>
libgcc/macros.h contains some useful assembly macros that are common in
Linux kernel code and facilitate things such as unified ARM/THUMB
assembly. This patch moves it to a more general place where it can be
used by other code as well.
Change-Id: If68e8930aaafa706c54cf9a156fac826b31bb193
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/182178
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
(cherry picked from commit a780670def94a969829811fa8cf257f12b88f085)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6917
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>
This is needed by depthcharge on ARM if coreboot is loading its
ramstage from the RW section of the ROM.
Change-Id: I96c6c04a0cee39854b45f2eda169e93461da0694
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: https://chromium-review.googlesource.com/176757
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Commit-Queue: Stefan Reinauer <reinauer@chromium.org>
Tested-by: Stefan Reinauer <reinauer@chromium.org>
(cherry picked from commit cf26be4cb527b0fc4212d401a8c77ceb1c7992d0)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6906
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
This functionality is already available for ARM, so lets add it to x86 as
well. We'll want to be able to hook exceptions when running as a remote GDB
target.
Change-Id: I42f640b08eb9eb86a1bcab3c327f7780191a2eb5
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://chromium-review.googlesource.com/179601
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit 5b8cf0c9f70a7e14766a2b095e6739a8d6321a34)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6898
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
"Hey guys, I have this awesome idea! How about we put a huge array
filled with 0xa5 into the data segment of our uncompressed romstage
for no particular reason? Give our SPI driver something to do so it
doesn't get too bored, you know?"
Guess it pays off to just hexdump our image and sanity-check it top to
bottom every once in a while...
Also reduces the size because 8K is crazy just to print a bunch of
registers (256 bytes ought to be enough for anybody).
Old-Change-Id: Icec0a711a1b5140d2ebcd98338ec638a4b6262fa
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/176762
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Reviewed-by: Ronald Minnich <rminnich@chromium.org>
Reviewed-by: David Hendricks <dhendrix@chromium.org>
(cherry picked from commit 61c360a1c3f445535c9ff383a389e643cfe4527c)
arm: Remove exception_test()
The exception_test() mechanism might have been useful when exceptions
were first implemented, but now that they are pretty stable it's really
not necessary anymore (especially not on every single boot in production
Chromebooks). It forces a simple unaligned access, and as we start
having exceptions in stages that might not have paging turned on yet,
it's better to remove that completely.
Also removed the duplicated implementations of SCTLR-stuff and switched
to the existing ones in cache.h.
Old-Change-Id: I85e66269f5e2f2dfd3e8aaaa18441493514b62f8
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/177101
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Reviewed-by: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit d0706b848572fbea26e0e432ec5827503b9603c9)
Squashed 2 exception related commits.
Change-Id: Id2c115ee39a0732c375472afc0194436e2f5e069
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6885
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This patch removes the -ffixed-r8 CFLAG from the coreboot and libpayload
Makefiles. This seems to be a relic from U-Boot, which uses that
register to keep it's global data structure pointer. There's no reason
for us to throw away a perfectly fine register on this already pretty
constrained architecture.
Also removed a config.h inclusion from the Makefile because that should
really be done inside the C files.
Change-Id: Ia176c0f323c1be07cddf88fa5488788786a27cdf
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/177110
Reviewed-by: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit 2a81112abde284ba09020db6afa363169911a7f6)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6880
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
There are ARM systems which are essentially heterogeneous multicores where
some cores implement a different ARM architecture version than other cores. A
specific example is the tegra124 which boots on an ARMv4 coprocessor while
most code, including most of the firmware, runs on the main ARMv7 core. To
support SOCs like this, the plan is to generalize the ARM architecture so that
all versions are available, and an SOC/CPU can then select what architecture
variant should be used for each component of the firmware; bootblock,
romstage, and ramstage.
Old-Change-Id: I22e048c3bc72bd56371e14200942e436c1e312c2
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://chromium-review.googlesource.com/171338
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit 8423a41529da0ff67fb9873be1e2beb30b09ae2d)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
ARM: Split out ARMv7 code and make it possible to have other arch versions.
We don't always want to use ARMv7 code when building for ARM, so we should
separate out the ARMv7 code so it can be excluded, and also make it possible
to include code for some other version of the architecture instead, all per
build component for cases where we need more than one architecture version
at a time.
The tegra124 bootblock will ultimately need to be ARMv4, but until we have
some ARMv4 code to switch over to we can leave it set to ARMv7.
Old-Change-Id: Ia982c91057fac9c252397b7c866224f103761cc7
Reviewed-on: https://chromium-review.googlesource.com/171400
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit 799514e6060aa97acdcf081b5c48f965be134483)
Squashed two related patches for splitting ARM support into general
ARM support and ARMv7 specific pieces.
Change-Id: Ic6511507953a2223c87c55f90252c4a4e1dd6010
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6782
Tested-by: build bot (Jenkins)
This minor refactoring patch changes the signature of all limited cache
invalidation functions in coreboot and libpayload from unsigned long to
void * for the address argument, since that's really what you have in
95% of the cases and I think it's ugly to have casting boilerplate all
over the place.
Change-Id: Ic9d3b2ea70b6aa8aea6647adae43ee2183b4e065
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/167338
(cherry picked from commit d550bec944736dfa29fcf109e30f17a94af03576)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6623
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
The cache functions for armv7 require 'march=armv7-a' to use
the 'isb' and 'dsb' instructions.
Change-Id: I3b7ad8fc7da8c3167b38fd1a325090fe49e4ca42
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6668
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Patch 'coreboot_tables: reduce redundant data structures' (1f5487a)
added a new lb_range structure to coreboot and libpayload but the
original chromium patch added cb_range to libpayload instead. A followup
patch 'arm: libpayload: Add cache coherent DMA memory definition
and management' (b8fad3d) used the incorrect cb_range structure but
this wasn't caught since the current verification build doesn't
build libpayload for arm.
Change-Id: I7cedc66a4794bf4daa214f54be6e917f96418ff6
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6665
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
This patch adds a mechanism to set aside a region of cache-coherent
(i.e. usually uncached) virtual memory, which can be used to communicate
with DMA devices without automatic cache snooping (common on ARM)
without the need of explicit flush/invalidation instructions in the
driver code.
This works by setting aside said region in the (board-specific) page
table setup, as exemplary done in this patch for the Snow and Pit
boards. It uses a new mechanism for adding board-specific Coreboot table
entries to describe this region in an entry with the LB_DMA tag.
Libpayload's memory allocator is enhanced to be able to operate on
distinct types/regions of memory. It provides dma_malloc() and
dma_memalign() functions for use in drivers, which by default just
operate on the same heap as their traditional counterparts. However, if
the Coreboot table parsing code finds a CB_DMA section, further requests
through the dma_xxx() functions will return memory from the region
described therein instead.
Change-Id: Ia9c249249e936bbc3eb76e7b4822af2230ffb186
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/167155
(cherry picked from commit d142ccdcd902a9d6ab4d495fbe6cbe85c61a5f01)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6622
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
There are three coreboot table tags that all define some kind of memory
region, and each has their own homologous struct. I'm about to add a
fourth so I'll just clean this up and turn it into a generic struct
lb_range instead.
Change-Id: Id148b2737d442e0636d2c05e74efa1fdf844a0d3
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/167154
(cherry picked from commit 22d82ffa3f5500fbc1b785e343add25e61f4f194)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6456
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
This patch enhances the armv7 exception handlers in Coreboot and
libpayload to show the correct SP and LR registers from the aborted
context, and also dump a part of the current stack. Since we cannot
access the banked registers of SVC mode from a different exception mode,
it changes Coreboot (and its payloads) to run in System mode instead. As
both modes can execute all privileged instructions, this should not have
any noticeable effect on firmware operation (please correct me if I'm
wrong!).
Change-Id: I0e04f47619e55308f7da4a3a99c9cae6ae35cc30
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/170045
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
(cherry picked from commit d0db2f5e938200e3f5899c5e1f1606ab2dd5b334)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6538
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
When libpayload header files are included in the payload itself, it's possible
that the payloads config settings will conflict with the ones in libpayload.
It's also possible for the libpayload config settings to conflict with the
payloads. To avoid that, the libpayload config settings have _LP_ (for
libpayload) added to them. The symbols themselves as defined in the Config.in files
are still the same, but the prefix added to them is now CONFIG_LP_ instead of just
CONFIG_.
Change-Id: Ib8a46d202e7880afdeac7924d69a949bfbcc5f97
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/65303
Reviewed-by: Stefan Reinauer <reinauer@google.com>
Tested-by: Gabe Black <gabeblack@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit 23e866da20862cace0ed2a67d6fb74056bc9ea9a)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6427
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
This adds a wrapper for data cache clean (without invalidate)
by set/way.
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Old-Change-Id: I09ee1563890350a6c1d04f1b96ac5d0c042e2af2
Reviewed-on: https://gerrit.chromium.org/gerrit/66118
Commit-Queue: David Hendricks <dhendrix@chromium.org>
Tested-by: David Hendricks <dhendrix@chromium.org>
Reviewed-by: Ronald G. Minnich <rminnich@chromium.org>
(cherry picked from commit 05bc4f8564c547eacb9cc840a03b916b3c1c6001)
armv7: clean but do not invalidate caches between stages
This cleans the caches without invalidating them between stages. The
dcache content should still be valid when the next stage begins, so
we should see a small performance gain.
(thanks to gabeblack for pointing this out)
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Old-Change-Id: Ie18d163f3a78e2786e9fbc7479c8bd896b8ac3aa
Reviewed-on: https://gerrit.chromium.org/gerrit/66119
Commit-Queue: David Hendricks <dhendrix@chromium.org>
Tested-by: David Hendricks <dhendrix@chromium.org>
Reviewed-by: Ronald G. Minnich <rminnich@chromium.org>
(cherry picked from commit 619bfe4cf9b93847e38d03d7076beb78fbfa1d1d)
armv7: Make coreboot and libpayload cache files the same
This merges the difference between the ARM version of cache.c and
cache.h for libpayload and coreboot.
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Old-Change-Id: I246d2ec98385100304266f4bb15337a8fcf8df93
Reviewed-on: https://gerrit.chromium.org/gerrit/66120
Commit-Queue: David Hendricks <dhendrix@chromium.org>
Tested-by: David Hendricks <dhendrix@chromium.org>
Reviewed-by: Ronald G. Minnich <rminnich@chromium.org>
(cherry picked from commit 0c92f694034f1e94a8aa7811251738c9dc3db2c6)
ARM: Fix cache cleaning operation.
There was no behavior defined for OP_DCCSW in dcache_op_set_way, so it
silently did nothing. Since we started using that to clean the cache between
stages and I have a change that enables caches earlier on, this was preventing
booting on pit.
Old-Change-Id: I3615b6569bf8de195d19d26b62f02932322b7601
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/66234
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit 99241468cb9dcc86fcca9266ffe72baa88a1f79f)
libpayload: Fix data cache cleaning on ARM.
A similar fix was made to coreboot where OP_DCCSW was silently not doing
anything in dcache_op_set_way.
Old-Change-Id: Ia0798aef0cd02da7d1a14b7affa05038a002ab3b
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/66236
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
(cherry picked from commit 6f6596a182a6780a2e997ac320733722697990c5)
Squashed five related commits.
Change-Id: I763d42bd5dd9f58734e1e21eb7c8ce3ce2ea56ee
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6418
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
The generic cbfs code relies on the libpayload_init_default_cbfs_media
symbol. However, none was provided for ARM. Provide an empty
implementation that returns an error as there is no generic way
to locate the default cbfs media.
Old-Change-Id: Ie0d06fbe6fc790c9d92434cd2d60922908acdc69
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/56805
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
(cherry picked from commit d3410c28ef9f37b832e2fa2d18351dda332bc9f7)
libpayload: place dummy_media.c in correct object list
The commit introducing dummy_media.c was placed in the
libc object list. This wasn't correct. It should be in the
libcbfs object list as well as guarded by CONFIG_CBFS.
Old-Change-Id: Iace43fff8f85f60ecac5e6eb8350cd1f3ee9d35e
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/56925
(cherry picked from commit 7937c7c5e95a934593bc0cedd5f4496b4770c303)
Squashed two related commits.
Change-Id: I84cd132b44cc2ea5b29acf109a3562baaeede9c6
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6411
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Pull the ACPI GNVS pointer from CBMEM and expose it in
the sysinfo structure for use by payloads.
BUG=chrome-os-partner:24380
BRANCH=none
TEST=build and boot rambi with emmc in ACPI mode
Change-Id: I47c358f33c464a4a01080268fb553705218c940c
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/179900
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/5016
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Change-Id: I7252925ef5c4efb69cad6b6fa179031162cf8e74
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/61058
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/4346
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
When dealing with DMA, we need a function to invalidate cache without corrupting
contents on main memory (clean).
Change-Id: I28e632ae57a7b7ed1accee74e76045b92f92a699
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/61078
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/4345
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
The OP assigned by dcache_clean_by_mva must be handled in
dcache_op_mva.
Change-Id: Ib32262f0419453b2690d7c1a1c6602380b46a37f
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/61077
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/4344
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
- Add -ffreestanding and -fomit-frame-pointer for all
platforms.
- Add ARMv7 specific flags to the armv7 Makefile
Change-Id: I71ab1b096e505940cc20c266bccd43917bcfad3a
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/56104
Commit-Queue: Stefan Reinauer <reinauer@chromium.org>
Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
Tested-by: Stefan Reinauer <reinauer@chromium.org>
Reviewed-on: http://review.coreboot.org/4317
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Currently, the exception handling code on ARM in libpayload turns on alignment
checks as an easy way to generate an exception for testing purposes. It was
leaving it on which disabled unaligned accesses for other, unlreated code
running later. This change adjusts the code so the original value of the
alignment bit is restored after the test exception.
Built and booted into depthcharge on pit with an unaligned accesses added
after the call to exception_init in the depthcharge's main. Before this
change, the access caused an exception. After this change, the access
completed successfully.
Change-Id: If92cab3cc8eabca7c5b0560ce88a8796a27fe3b2
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/59372
Reviewed-by: Stefan Reinauer <reinauer@google.com>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/4255
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins)
The address range to scan for the coreboot tables varies from machine to
machine based on the range memory occupies on the SOC being booted and on the
amount of memory installed on the machine. To make libpayload work on
different ARM systems with different needs, this change makes the region to
scan configurable. In the future, we might want to come up with a more
automatic mechanism like on x86, although there's less consistency on ARM as
far as what ranges are even memory in the first place.
Change-Id: Ib50efe25a6152171b0fbd0e324dbc5e89c527d6e
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/59242
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/4254
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins)
Otherwise the code would try to parse GPIOs when encountering
a mainboard entry in the coreboot table. This never caused any
problems because the mainboard entry is parsed before the GPIO
entry.
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Change-Id: I1443bda8585a990a39115743d48304ec4b54bccb
Reviewed-on: https://gerrit.chromium.org/gerrit/59292
Reviewed-by: Ronald G. Minnich <rminnich@chromium.org>
Commit-Queue: Stefan Reinauer <reinauer@google.com>
Tested-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/4252
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins)
This was never completed / working and we have the working
ARMv7 port for an architecture template, so get rid of this
dead code.
Change-Id: Ic2c1267ee5546dd6e1b63220c263b2fa86c8ae33
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/56065
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-by: Ronald G. Minnich <rminnich@chromium.org>
Commit-Queue: Stefan Reinauer <reinauer@chromium.org>
Reviewed-on: http://review.coreboot.org/4235
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Change-Id: I3235f42c7faaf28a63455162ea55dc1a6bebd1f5
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-by: Hung-Te Lin <hungte@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/48290
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/4128
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
This imports the cache/MMU code from coreboot as of 1877cee.
Change-Id: I97ec8b9640921a94a4b27d89e4ae6185e9f96f18
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/48288
Commit-Queue: Stefan Reinauer <reinauer@google.com>
Tested-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/4134
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
The memset and memcpy functions are assembled as ARM code, likely because
that's the default of the assembler. Without special annotation, the assembler
and linker don't know that those symbols are functions which need special
handling so that ARM/thumb issues are handled properly. This change adds that
annotation which gets those functions working in Coreboot which is compiled as
thumb. Libpayload and depthcharge are compiled as ARM so they don't *need* the
annotation since it just works out in ARM mode, but it's the safe thing to do
in case we change that in the future.
We should explicitly select ARM vs. thumb when assembling assembly files to be
consistent across builds and toolchains.
Change-Id: I814b137064cf46ae9e2744ff6c223b695dc1ef01
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/3672
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This imports the newest cache and MMU code from coreboot. This
time it's so new that it hasn't even been checked in to coreboot.
However, this version at least allows DMA to work properly for the
MSHC driver. So even if we rebase a few more times, this version is
at least a step in the right direction.
Note: This omits the stuff that sets up dcache policy since
libpayload should not need to worry about that and it depends
on cbmem stuff.
Change-Id: Idd42b083e8019634aaaa44d5bf5b51db6c3912f5
Signed-off-by: David Hendricks <dhendrix@google.com>
Reviewed-on: http://review.coreboot.org/2975
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Tested-by: build bot (Jenkins)
This imports the new cache maintenance API from coreboot at
commit bba8090. This is a BSD-licensed implementation which
exposes cache maintenance opertaions necessary for payloads
for things such as DMA transfers.
Change-Id: I554676db89517bebc6edae4f7ab7e5882e6f986d
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/2974
Tested-by: build bot (Jenkins)
On x86, coreboot may allocate a variable range MTRR for enabling caching
of the system ROM. Add the ability to parse this structure and add the
result to the sysinfo structure.
An example usage implementation would be to obtain the variable MTRR
index that covers the ROM from the sysinfo structure. Then one would
disable caching and change the MTRR type from uncacheable to
write-protect and enable caching. The opposite sequence is required
to tearn down the caching.
Change-Id: I3bfe2028d8574d3adb1d85292abf8f1372cf97fa
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/2920
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
After another incident related to virtual pointers in lib_sysinfo (and
resulting confusion), I decided to put some comments on the matter into
the code.
Remember, we decided to always use virtual pointers in lib_sysinfo, but
it's not always obvious from the code, that they are.
See also:
425973c libpayload: Always use virtual pointers in struct sysinfo_t
593f577 libpayload: Fix use of virtual pointers in sysinfo
Change-Id: I886c3b1d182cba07f1aab1667e702e2868ad4b68
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/2878
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
The vboot_handoff structure needs to be parsed from the coreboot tables.
Add a placeholder in sysinfo as well as the ability to parse the
coreboot table entry concering the vboot_handoff structure.
Built with unified boot loader and ebuild changes. Can find and use
the VbInitParams for doing kernel selection.
Change-Id: If40a863b4a445fa5f7814325add03355fd0ac647
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/2720
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
The timekeeping code in libpayload was dependent on rdtsc, and when it was
split up by arch, that code was duplicated even though it was mostly the same.
This change factors out actually reading the count from the timer and the
speed of the timer and puts the definitions of ndelay, udelay, mdelay and
delay into generic code. Then, in x86, the timer_hz and timer_get_raw_value
functions which used to be in depthcharge were moved over to libpayload's
arch/x86/timer.c. In ARM where there isn't a single, canonical timer, those
functions are omitted with the intention that they'll be implemented by a
specific timer driver chosen elsewhere.
Change-Id: I9c919bed712ace941f417c1d58679d667b2d8269
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: http://review.coreboot.org/2717
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
'for' loop initial declarations are only allowed in C99 mode
I didn't realize we don't enable 14 year old features when building
libpayload, and I must have accidentally not rebuilt everything when making my
final tweaks to my earlier change.
Change-Id: I6caeeffad177b6d61fa30175f767e85084c061f4
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: http://review.coreboot.org/2718
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
Don't keep using the coreboot stack on ARMv7.
Change-Id: I734c5d77f8584e30ee0c720d41e21e3040f56db4
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: http://review.coreboot.org/2668
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Default it to no to be consistent with the other architecture wide options
(endianness), and turn it on explicitly for x86 and PowerPC.
Change-Id: Idda26d580156bbbf08ea11b28abe75cfa6b594b2
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: http://review.coreboot.org/2658
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Give some indication what happened instead of just crashing.
As part of setup, cause an exception and make sure that we get
the right one, and that we recover correctly. Hence we have
some assurance that if they really happen we can handle them.
Built and booted into test payload on Snow. Saw the built in test function
worked correctly. Artificially added code which got an exception and saw that
the error information prints correctly.
Change-Id: I2e0d022f090ee422fb988074fbb197afa2485caa
Signed-off-by: Gabe Black <gabeblack@google.com>
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-on: http://review.coreboot.org/2569
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)
The linker uses that info so interworking can work correctly.
Built and booted into depthcharge on Snow and saw interworking start to
work correctly.
Change-Id: I0ac54f1c424ec70f8244edf6541a10b089ce47b4
Signed-off-by: Gabe Black <gabeblack@google.com>
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-on: http://review.coreboot.org/2568
Tested-by: build bot (Jenkins)
The interval used to be about 55 ms which is excessively long. Coreboot only
waits for 2 ms and gets a reasonable answer. That should be good enough for us
as well.
Change-Id: I4d4e8b25b6ba540c9e9839ed0bbaa1f04f67cce1
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: http://review.coreboot.org/2520
Tested-by: build bot (Jenkins)
Reviewed-by: Anton Kochkov <anton.kochkov@gmail.com>
Not only were these files checked in with the Chromium OS Authors
copyright, but in addition they were wrongly licensed as GPL.
Switch to 3-clause BSD (and, since we're changing it, fix copyright,
too)
Change-Id: I3656c1f4304d53e343d89bb7c909fd4b929249f4
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/2456
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
These live at the bottom of memory on x86, but that's IO mapped on the exynos.
The particular range used will likely need to be configurable, but this will
make it work in one more case than it used to.
Change-Id: I4d4963b9732cf538d00f8effb4398f30cbbde6aa
Signed-off-by: Gabe Black <gabeblack@google.com>
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-on: http://review.coreboot.org/2410
Tested-by: build bot (Jenkins)
Reviewed-by: Gabe Black <gabeblack@chromium.org>
Reviewed-by: David Hendricks <dhendrix@chromium.org>
I think this needs to be its own ldscript. I'm pretty sure this one
is going to need some work however. Is libpayload PIC? That would be
best if so.
Change-Id: I44578d70dfa72de527af8901a86583c2a60130ec
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-on: http://review.coreboot.org/2398
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Tested-by: build bot (Jenkins)
Since it's utterly architecture-dependent, put it in arch/x86.
Avoid the temptation to make yet another directory with just one
file in it. Fix the makefile to pick up the proper arch-dependent script.
Change-Id: I21ea02551a97bdcbc38419714f3b38cf8335c178
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-on: http://review.coreboot.org/2389
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Upgrade CBFS in libpayload to use new media-based implementation from coreboot
( http://review.coreboot.org/#/c/2182/ ).
Old CBFS functions (cbfs_find, cbfs_find_file, get_cbfs_header) are still
supported, although the recommended way is to use new CBFS API.
To migrate your existing x86 payload source:
- Change cbfs_find to cbfs_get_file
- Change cbfs_find_file to cbfs_get_file_content
- Prefix every CBFS call with a CBFS_DEFAULT_MEDIA argument.
Ex, char *jpeg_data = cbfs_find_file("splash.jpg", CBFS_TYPE_BOOTSPLASH);
=> char *jpeg_data = cbfs_get_file_content(
CBFS_DEFAULT_MEDIA, "splash.jpg", CBFS_TYPE_BOOTSPLASH);
The legacy setup_cbfs_from_{ram,flash} is also supported, although the better
equivalent is to make a new media instance:
struct cbfs_media ram_media;
init_cbfs_ram_media(&ram_media, start, size);
char *data = cbfs_get_file_content(&ram_media, "myfile", my_type);
Verified by being successfully linked with filo.
Change-Id: If797bc7e3ba975d7e3be905c59424f7a93b8ce11
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: http://review.coreboot.org/2191
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Anton Kochkov <anton.kochkov@gmail.com>
This compiles, but it's not tested yet.
Change-Id: I2f73a814649aa36c39af3e77cefd8a968671f5c0
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/2035
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
In I4c456f5, I falsely identified struct cb_string.string as a pointer
which it is not. So we don't need phys_to_virt() here.
Change-Id: I3e2b6226ae2b0672dfc6e0fa4f6990e14e1b7089
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/1987
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This renames TARGET_I386 to ARCH_X86 to make it more uniform with
other parts of the codebase, e.g. cbfs_core.h from cbfstool.
Change-Id: I1babcc941245ed1dde0478a21828766759373a42
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/1961
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Dave Frodin <dave.frodin@se-eng.com>
We had mixed virtual and physical pointers in struct sysinfo_t. Some
being virtual by accident which led to problems when we tried to
reinitialize lib_sysinfo after relocating FILO (to get intentionally
virtual pointers valid again). I guess this didn't cause much trouble
before, as lib_get_sysinfo() was always called with physical addresses
being equal to their virtual counterparts.
For FILO, two possibilities seem practical: Either, have all pointers in
struct sysinfo_t physical, so relocation doesn't hurt. Or, have all
pointers virtual and call lib_get_sysinfo() again after relocation.
This patch goes the latter way, changing the following pointers for
situations where virtual pointers differ from physical:
.extra_version
.build
.compile_time
.compile_by
.compile_host
.compile_domain
.compiler
.linker
.assembler
.cb_version
.vdat_addr
.tstamp_table
.cbmem_cons
.mrc_cache
We could also just correct the accidentally virtual pointers. But, IMO,
this would lower the risk of future confusion.
Note 1: Looks like .version gets never set.
Note 2: .option_table and .framebuffer were virtual pointers but treated
like physical ones. Even in FILO, this led to no problems as
they were set before relocation.
Change-Id: I4c456f56f049d9f8fc40e62520b1d8ec3dad48f8
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/1855
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Libpayload uses the linux kernel's config style, where CONFIG_* defines
don't get written for unset tristates.
Change-Id: I3f832cf86bca9a1e153d96af4bf6434a19eba2f6
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/1847
Tested-by: build bot (Jenkins)
Reviewed-by: Anton Kochkov <anton.kochkov@gmail.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
A payload may want to decide whether it uses certain input/output consoles,
or that it wants support for outputing to a particular device but not to use
that device as a console. This change adds a config option which skips the
call to console_init in start_main.
Change-Id: I32b224d4d0bd3a239b402ecb09ee907d53225735
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: http://review.coreboot.org/1732
Tested-by: build bot (Jenkins)
Reviewed-by: Anton Kochkov <anton.kochkov@gmail.com>
The endianness of an architecture is now set up automatically using Kconfig
and some common code. The available conversion functions were also expanded
to go to or from a particular endianness. Those use the abbreviation le or be
for little or big endian.
Built for Stumpy and saw coreinfo cbfs support work which uses network
byte order. Used the functions which convert to little endian to implement an
AHCI driver. The source arch is also little endian, so they were effectively
(and successfully) inert.
Change-Id: I3a2d2403855b3e0e93fa34f45e8e542b3e5afeac
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: http://review.coreboot.org/1719
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Give it somewhere to put the new info in sysinfo, and tell it how to parse
the new tables which it doesn't yet understand.
Change-Id: I01d3318138696e6407553c27c1814f79e3fbc4f8
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: http://review.coreboot.org/1718
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Change-Id: I0f3a82de860fd3afa10a557b37fb90fe6b06ae90
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: http://review.coreboot.org/1726
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Tested-by: build bot (Jenkins)
This information is now stored in a structure instead of in a few seperate
fields. libpayload hadn't been updated to reflect the new layout or to consume
the new information intelligently.
Change-Id: Ice3486ffcdcdbe1f16f9c84515120c591d8dc882
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: http://review.coreboot.org/1724
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Tested-by: build bot (Jenkins)
At least one of the console drivers, coreboot fb, uses information in the
sysinfo structure to set itself up. If that structure hasn't been populated,
the driver decides that there is no framebuffer and disables itself. Reversing
the order these are set up fixes that problem.
Change-Id: Idd8b5518980dfdd82fd4359dd0133ab7736fc428
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: http://review.coreboot.org/816
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Instead of macros to access MAINBOARD record, use convenience functions.
Store pointers to MAINBOARD and HEADER for use outside of CB code.
Change-Id: I074e3a0df7d25726cbd942538bfdc5a63dd17e12
Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
Reviewed-on: http://review.coreboot.org/502
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
The return status of get_coreboot_info() might be handy to a platform
driver calling lib_get_sysinfo() to test for the presence of coreboot.
Change-Id: I0176c93ee92c9dff733112026ee50f2ca797bdff
Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
Reviewed-on: http://review.coreboot.org/503
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
When processing FORWARD records, we weren't accounting for the pointer
being in the physical address space and not the virtual space instead.
Change-Id: I35ef637fbec7886d4cfeac5fd650a17eae8d555a
Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
Reviewed-on: http://review.coreboot.org/499
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
To avoid unnecessary casts, we can use untyped pointers when accessing
individual records.
Change-Id: I1d628d6e25f1e53b4fee34e7c2c4688a789c45a3
Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
Reviewed-on: http://review.coreboot.org/498
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Having submitted a module based on coreboot to LKML for acceptance,
it was requested that fewer macros and more inlines be used (because
of their superior type-checking when performing pointer casts, etc).
This is the first of several changes to make the relevant parts of
coreboot comply to linux code standards.
Change-Id: Iffe7061fa62fa639e0cb6ccb9125eb3403d06b1a
Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
Reviewed-on: http://review.coreboot.org/495
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Add information about memory mapped/io mapped base addresses.
and fix up libpayload to use the same structures
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Change-Id: I5f7b5eda6063261b9acb7a46310172d4a5471dfb
Reviewed-on: http://review.coreboot.org/261
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Doing a call before the payload has set up its stack is risky. The stack may
not be in a favorable location. Normally this is not an issue with coreboot
or other well behaved callers.
Change-Id: Ie6f6748a471324b29ebad045c807dfc9f4b92034
Signed-off-by: Marc Jones <marcj303@gmail.com>
Reviewed-on: http://review.coreboot.org/240
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
- its Makefile is part of the libpayload project
- fix conversion bug in powerpc's Makefile.inc
Change-Id: I84f2da092c3733ea7d0f232cb3768078cf13dfd5
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/79
Tested-by: build bot (Jenkins)
Reviewed-by: Uwe Hermann <uwe@hermann-uwe.de>
The new build system uses quite a few more -W flags for the compiler by
default than the old one. And that's for the better.
Change-Id: Ia8e3d28fb35c56760c2bd0983046c7067e8c5dd6
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/72
Tested-by: build bot (Jenkins)
Reviewed-by: Uwe Hermann <uwe@hermann-uwe.de>
This change makes building coreboot related projects more unified.
Change-Id: I0f1181e2fffde1e03675523f7dc9eef3119052c3
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/71
Tested-by: build bot (Jenkins)
Reviewed-by: Uwe Hermann <uwe@hermann-uwe.de>
Libpayload shouldn't count on coreboot or other payloads to clear memory. This fixes problems with payloads being loaded after or on top of each other.
Change-Id: I30303d47e465e8921f47acab667c7998ba79fca7
Signed-off-by: Marc Jones <marcj303@gmail.com>
Reviewed-on: http://review.coreboot.org/66
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
according to libc/posix traditions, to simplify porting applications to
payloads.
It also adds a couple of functions:
strcasecmp, strncasecmp, strcat, strtol, strspn, strcspn, strtok_r,
strtok, perror, exit, getpagesize
Signed-off-by: Patrick Georgi <patrick.georgi@coresystems.de>
Acked-by: Stefan Reinauer <stepan@coresystems.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5643 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Patrick Georgi <patrick.georgi@coresystems.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5295 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Patrick Georgi <patrick.georgi@coresystems.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5292 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
process.
The PPC support is still stubbed, with commented out x86 code as guide
line for an implementor.
Signed-off-by: Patrick Georgi <patrick.georgi@coresystems.de>
Acked-by: Stefan Reinauer <stepan@coresystems.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4293 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Julius Werner