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2018-05-22Introduce bootblock self-decompressionJulius Werner
Masked ROMs are the silent killers of boot speed on devices without memory-mapped SPI flash. They often contain awfully slow SPI drivers (presumably bit-banged) that take hundreds of milliseconds to load our bootblock, and every extra kilobyte of bootblock size has a hugely disproportionate impact on boot speed. The coreboot timestamps can never show that component, but it impacts our users all the same. This patch tries to alleviate that issue a bit by allowing us to compress the bootblock with LZ4, which can cut its size down to nearly half. Of course, masked ROMs usually don't come with decompression algorithms built in, so we need to introduce a little decompression stub that can decompress the rest of the bootblock. This is done by creating a new "decompressor" stage which runs before the bootblock, but includes the compressed bootblock code in its data section. It needs to be as small as possible to get a real benefit from this approach, which means no device drivers, no console output, no exception handling, etc. Besides the decompression algorithm itself we only include the timer driver so that we can measure the boot speed impact of decompression. On ARM and ARM64 systems, we also need to give SoC code a chance to initialize the MMU, since running decompression without MMU is prohibitively slow on these architectures. This feature is implemented for ARM and ARM64 architectures for now, although most of it is architecture-independent and it should be relatively simple to port to other platforms where a masked ROM loads the bootblock into SRAM. It is also supposed to be a clean starting point from which later optimizations can hopefully cut down the decompression stub size (currently ~4K on RK3399) a bit more. NOTE: Bootblock compression is not for everyone. Possible side effects include trying to run LZ4 on CPUs that come out of reset extremely underclocked or enabling this too early in SoC bring-up and getting frustrated trying to find issues in an undebuggable environment. Ask your SoC vendor if bootblock compression is right for you. Change-Id: I0dc1cad9ae7508892e477739e743cd1afb5945e8 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/26340 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2015-10-31tree: drop last paragraph of GPL copyright headerPatrick Georgi
It encourages users from writing to the FSF without giving an address. Linux also prefers to drop that and their checkpatch.pl (that we imported) looks out for that. This is the result of util/scripts/no-fsf-addresses.sh with no further editing. Change-Id: Ie96faea295fe001911d77dbc51e9a6789558fbd6 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Reviewed-on: http://review.coreboot.org/11888 Tested-by: build bot (Jenkins) Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
2015-07-09arm: add __umoddi3() to libgcc implementationStefan Reinauer
Change-Id: Ida01506406d1d74211f0155a84c2b25dbaac5f1c Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Reviewed-on: http://review.coreboot.org/10860 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2015-05-21Remove address from GPLv2 headersPatrick Georgi
As per discussion with lawyers[tm], it's not a good idea to shorten the license header too much - not for legal reasons but because there are tools that look for them, and giving them a standard pattern simplifies things. However, we got confirmation that we don't have to update every file ever added to coreboot whenever the FSF gets a new lease, but can drop the address instead. util/kconfig is excluded because that's imported code that we may want to synchronize every now and then. $ find * -type f -exec sed -i "s:Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, *MA[, ]*02110-1301[, ]*USA:Foundation, Inc.:" {} + $ find * -type f -exec sed -i "s:Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA:Foundation, Inc.:" {} + $ find * -type f -exec sed -i "s:Foundation, Inc., 59 Temple Place[-, ]*Suite 330, Boston, MA *02111-1307[, ]*USA:Foundation, Inc.:" {} + $ find * -type f -exec sed -i "s:Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.:Foundation, Inc.:" {} + $ find * -type f -a \! -name \*.patch \ -a \! -name \*_shipped \ -a \! -name LICENSE_GPL \ -a \! -name LGPL.txt \ -a \! -name COPYING \ -a \! -name DISCLAIMER \ -exec sed -i "/Foundation, Inc./ N;s:Foundation, Inc.* USA\.* *:Foundation, Inc. :;s:Foundation, Inc. $:Foundation, Inc.:" {} + Change-Id: Icc968a5a5f3a5df8d32b940f9cdb35350654bef9 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Reviewed-on: http://review.coreboot.org/9233 Tested-by: build bot (Jenkins) Reviewed-by: Vladimir Serbinenko <phcoder@gmail.com>
2015-01-27vboot2: implement select_firmware for pre-romstage verificationDaisuke Nojiri
This patch has a basic structure of vboot2 integration. It supports only Nyans, which have bootblock architecture and romstage architecture are compatible from linker's perspective. TEST=Built with VBOOT2_VERIFY_FIRMWARE on/off. Booted Nyan Blaze. BUG=None BRANCH=none Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org> Original-Change-Id: I4bbd4d0452604943b376bef20ea8a258820810aa Original-Reviewed-on: https://chromium-review.googlesource.com/204522 Original-Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org> Original-Commit-Queue: Daisuke Nojiri <dnojiri@chromium.org> Original-Tested-by: Daisuke Nojiri <dnojiri@chromium.org> (cherry picked from commit a6bce0cbed34def60386f3d9aece59e739740c58) Signed-off-by: Marc Jones <marc.jones@se-eng.com> Change-Id: I63ddfbf463c8a83120828ec8ab994f8146f90001 Reviewed-on: http://review.coreboot.org/8160 Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Tested-by: build bot (Jenkins)
2014-11-05ARM: Use local versions of libgcc functions instead of linking against libgcc.Gabe Black
The flags used to compile libgcc may make it incompatible with the code it's linked against, and/or the hardware it's going to run on. Rather than try to tease the right libgcc from the compiler, lets just leave it out and use our own implementations of the necessary functions. Most of these implementations were taken from the Linux kernel, except for uldivmod.S which was taken from a CL originally written for U-Boot by Che-Liang Chiou in December of 2010. It was modified to not use the CLZ instruction on machines that don't have it, anything earlier than ARMv5. The top block was taken from an earlier version of the same CL which didn't use CLZ in that spot. The later block was written from scratch. BUG=None TEST=Built and booted into the bootblock on nyan. Ran a series of tests which divided and modded a 64 bit value by various 32 bit values which were powers of 2. Confirmed that this function was used and that the returned value was correct. Printed decimal and hex versions of some values and verified that they equaled each other. Built and booted on pit with serial enabled. BRANCH=None Original-Change-Id: I7527e28af411b7aa7f94579be95a6b352a91a224 Original-Signed-off-by: Gabe Black <gabeblack@google.com> Original-Reviewed-on: https://chromium-review.googlesource.com/172401 Original-Reviewed-by: David Hendricks <dhendrix@chromium.org> Original-Commit-Queue: Gabe Black <gabeblack@chromium.org> Original-Tested-by: Gabe Black <gabeblack@chromium.org> (cherry picked from commit be8c7a8f3292a7d7651b7c6dafc9a2c53afbd402) *** This second patch is cherry-picked and squashed again to *** pick up the libgcc changes that were skipped previously. arm: Move libgcc assembly macros to arch/asm.h 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. BUG=None TEST=Snow still boots. Original-Change-Id: If68e8930aaafa706c54cf9a156fac826b31bb193 Original-Signed-off-by: Julius Werner <jwerner@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/182178 Original-Reviewed-by: Vincent Palatin <vpalatin@chromium.org> (cherry picked from commit a780670def94a969829811fa8cf257f12b88f085) *** Additional changes for stage specific builds Signed-off-by: Marc Jones <marc.jones@se-eng.com> Change-Id: Ie3e48f34ebf6fbe20c3dd76ecbcbea7844e9466e Reviewed-on: http://review.coreboot.org/7322 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>