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path: root/payloads/libpayload/drivers/serial/8250.c
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2020-08-24libpayload: Cache physical location of serial-console structNico Huber
In the presence of self-relocating payloads, it's safer to keep physical addresses in `libsysinfo`. Change-Id: Icd30e95c6b8115d16dd793914fb01a1a9da1854f Signed-off-by: Nico Huber <nico.h@gmx.de> Reviewed-on: https://review.coreboot.org/c/coreboot/+/43577 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Julius Werner <jwerner@chromium.org>
2020-05-11treewide: Remove "this file is part of" linesPatrick Georgi
Stefan thinks they don't add value. Command used: sed -i -e '/file is part of /d' $(git grep "file is part of " |egrep ":( */\*.*\*/\$|#|;#|-- | *\* )" | cut -d: -f1 |grep -v crossgcc |grep -v gcov | grep -v /elf.h |grep -v nvramtool) The exceptions are for: - crossgcc (patch file) - gcov (imported from gcc) - elf.h (imported from GNU's libc) - nvramtool (more complicated header) The removed lines are: - fmt.Fprintln(f, "/* This file is part of the coreboot project. */") -# This file is part of a set of unofficial pre-commit hooks available -/* This file is part of coreboot */ -# This file is part of msrtool. -/* This file is part of msrtool. */ - * This file is part of ncurses, designed to be appended after curses.h.in -/* This file is part of pgtblgen. */ - * This file is part of the coreboot project. - /* This file is part of the coreboot project. */ -# This file is part of the coreboot project. -# This file is part of the coreboot project. -## This file is part of the coreboot project. --- This file is part of the coreboot project. -/* This file is part of the coreboot project */ -/* This file is part of the coreboot project. */ -;## This file is part of the coreboot project. -# This file is part of the coreboot project. It originated in the - * This file is part of the coreinfo project. -## This file is part of the coreinfo project. - * This file is part of the depthcharge project. -/* This file is part of the depthcharge project. */ -/* This file is part of the ectool project. */ - * This file is part of the GNU C Library. - * This file is part of the libpayload project. -## This file is part of the libpayload project. -/* This file is part of the Linux kernel. */ -## This file is part of the superiotool project. -/* This file is part of the superiotool project */ -/* This file is part of uio_usbdebug */ Change-Id: I82d872b3b337388c93d5f5bf704e9ee9e53ab3a9 Signed-off-by: Patrick Georgi <pgeorgi@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/41194 Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-04-20libpayload: Make 8250 UART driver relocation safeNico Huber
`lib_sysinfo->serial` is a virtual pointer into coreboot tables. It's not valid across relocation. Accessing the wrong value during relocation of FILO resulted in a hang with DEBUG_SEGMENT and UART console enabled. Work around that by caching the whole table entry locally. An alternative would be to revise `sysinfo`, to contain no virtual pointers to anything outside the payload. Change-Id: I03adaf57b83a177316d7778f7e06df8eb6f9158e Signed-off-by: Nico Huber <nico.huber@secunet.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/37513 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Reto Buerki <reet@codelabs.ch> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
2019-05-13libpayload: classify all keyboardsMatt Delco
Depthcharge uses the keyboard type to help determine whether it can trust the keyboard for security-sensitive confirmations. Currently it trusts anything except usb, but now there's a need to distrust ec-based ps/2 keyboards that are associated with untrusted ECs. To help facilitate this, coreboot needs to report more details about non-usb keyboards, so this change replaces the current instances of unknown with enum values that distinguish uart and gpio from ec-based keyboards. BUG=b:129471321 BRANCH=None TEST=Local compile and flash to systems with trusted and non-trusted ECs. Confirmed that security confirmation can't be performed via keyboard on a system with an untrusted EC but can still be performed on a system with a trusted EC. Change-Id: Iee6295dafadf7cb3da98b62f43b0e184b2b69b1e Signed-off-by: Matt Delco <delco@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/32717 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org>
2019-03-07payloads: Replace all IS_ENABLED(CONFIG_XXX) with CONFIG(XXX)Julius Werner
This patch is a raw application of find payloads/ -type f | \ xargs sed -i -e 's/IS_ENABLED\s*(CONFIG_/CONFIG(/g' Change-Id: I883b03b189f59b5d998a09a2596b0391a2d5cf33 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/31775 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2017-04-19libpayload/libc/console: Flush input driver buffer on initFurquan Shaikh
When console input driver registers itself, perform flush of input buffer to avoid interpreting any stale key presses before libpayload is run. keyboard.c: Remove the redundant buffer flush. 8250.c: Ensure that serial_hardware_is_present is set before call to add input driver. BUG=b:37273808 TEST=Verified that any key presses in serial console before payload is up do not have any effect after the payload starts running. Change-Id: I46f1b6715ccf6418f5b2c741bf90db2ece26a60d Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/19345 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2016-04-16libpayload: Split off generic serial API from 8250 driverStefan Reinauer
There is a lot of generic code in the 8250 driver that should be available for non-8250 systems with serial ports as well. Change-Id: I67fcb12b5fa99ae0047b3cbf1815043d3919437e Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Reviewed-on: https://review.coreboot.org/14371 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
2016-02-09libpayload: use 32bit access when accessing 4byte wide uart registersPatrick Georgi
This fixes serial on rk3288. Change-Id: I3dbf3cc165e516ed7b0132332624f882c0c9b27f Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Reviewed-on: https://review.coreboot.org/13636 Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Tested-by: build bot (Jenkins)
2015-09-10libpayload: Fix merge of PL011 UART supportNico Huber
Wished I hadn't seen that. Git saw the conflict (file was gone), both committer and reviewer thought it would be a good idea to re-add it as dead code (see 558e9b5: libpayload: Add minimal support for PL011 UART). Change-Id: Ifea8113fbc59e0463eaedb86b976f54ec11113a9 Signed-off-by: Nico Huber <nico.huber@secunet.com> Reviewed-on: http://review.coreboot.org/11604 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com> Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2015-06-30libpayload: Make Kconfig bools use IS_ENABLED()Stefan Reinauer
This will make the code work with the different styles of Kconfig (emit unset bools vs don't emit unset bools) Roughly, the patch does this, and a little bit of fixing up: perl -pi -e 's,ifdef (CONFIG_LP_.+?)\b,if IS_ENABLED\($1\),g' `find . -name *.[ch]` perl -pi -e 's,ifndef (CONFIG_LP_.+?)\b,if !IS_ENABLED\($1\),g' `find . -name *.[ch]` Change-Id: Ib8a839b056a1f806a8597052e1b571ea3d18a79f Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Reviewed-on: http://review.coreboot.org/10711 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2015-04-17libpayload: read register width from coreboot tableVadim Bendebury
Some SOCs (like pistachio, for instance) provide an 8250 compatible UART, which has the same register layout, but mapped to a bus of a different width. Instead of adding a new driver for these controllers, it is better to have coreboot report UART register width to libpayload, and have it adjust the offsets accordingly when accessing the UART. BRANCH=none BUG=chrome-os-partner:31438 TEST=with the rest of the patches integrated depthcharge console messages show up when running on the FPGA board Change-Id: I05891a9471a5369d3bfafe90cd0c9b0a7e5a667e Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: 2c30845f269ec6ae1d53ddc5cda0b4320008fa42 Original-Change-Id: Ia0a37cd5f24a1ee4d0334f8a7e3da5df0069cec4 Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/240027 Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/9739 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2014-12-22libpayload: console: Allow output drivers to print whole strings at onceJulius Werner
The console output driver framework in libpayload is currently built on the putchar primitive, meaning that every driver's function gets called one character at a time. This becomes an issue when we add drivers that could output multiple characters at a time, but have a high constant overhead per invocation (such as the planned GDB stub, which needs to wrap a special frame around output strings and wait for an acknowledgement from the server). This patch adds a new 'write' function pointer to the console_output_driver structure as an alternative to 'putchar'. Output drivers need to provide at least one of the two ('write' is preferred if available). The CBMEM console driver is ported as a proof of concept (since it's our most performace-critical driver and should in theory benefit the most from less function pointer invocations, although it's probably still negligible compared to the big sprawling mess that is printf()). Even with this fix, the problem remains that printf() was written with the putchar primitive in mind. Even though normal text already contains an optimization to allow multiple characters at a time, almost all formatting directives cause their output (including things like padding whitespace) to be putchar()ed one character at a time. Therefore, this patch reworks parts of the output code (especially number printing) to all but remove that inefficiency (directives still invoke an extra write() call, but at least not one per character). Since I'm touching printf() core code anyway, I also tried to salvage what I could from that weird, broken "return negative on error" code path (not that any of our current output drivers can trigger it anyway). A final consequence of this patch is that the responsibility to prepend line feeds with carriage returns is moved into the output driver implementations. Doing this only makes sense for drivers with explicit cursor position control (i.e. serial or video), and things like the CBMEM console that appears like a normal file to the system really have no business containing carriage returns (we don't want people to accidentally associate us with Windows, now, do we?). BUG=chrome-os-partner:18390 TEST=Made sure video and CBMEM console still look good, tried printf() with as many weird edge-case strings as I could find and compared serial output as well as sprintf() return value. Original-Change-Id: Ie05ae489332a0103461620f5348774b6d4afd91a Original-Signed-off-by: Julius Werner <jwerner@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/196384 Original-Reviewed-by: Hung-Te Lin <hungte@chromium.org> Original-Reviewed-by: David Hendricks <dhendrix@chromium.org> (cherry picked from commit ab1ef0c07736fe1aa3e0baaf02d258731e6856c0) Signed-off-by: Marc Jones <marc.jones@se-eng.com> Change-Id: I78f5aedf6d0c3665924995cdab691ee0162de404 Reviewed-on: http://review.coreboot.org/7880 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2014-11-09libpayload: serial: Move the depthcharge serial drivers into libpayload.Gabe Black
These drivers need to be ready right away and never really fit into the depthcharge driver model anyway. CQ-DEPEND=CL:194063 BUG=None TEST=Built and booted on nyan and peach_pit. Built for nyan_big, nyan_blaze, and daisy. BRANCH=None Original-Change-Id: I9570dee53c57d42ef4cd956f66a878ce39a2dc20 Original-Signed-off-by: Gabe Black <gabeblack@google.com> Original-Reviewed-on: https://chromium-review.googlesource.com/194057 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 26e18f680c93fc990a3d1057c164f19859634a9f) Signed-off-by: Marc Jones <marc.jones@se-eng.com> Change-Id: Ia2233e2bd821d8de8d2d57a9423aeb74be7efd93 Reviewed-on: http://review.coreboot.org/7224 Reviewed-by: Patrick Georgi <pgeorgi@google.com> Tested-by: build bot (Jenkins)