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2023-09-14x86: Add .data section support for pre-memory stagesJeremy Compostella
x86 pre-memory stages do not support the `.data` section and as a result developers are required to include runtime initialization code instead of relying on C global variable definition. To illustrate the impact of this lack of `.data` section support, here are two limitations I personally ran into: 1. The inclusion of libgfxinit in romstage for Raptor Lake has required some changes in libgfxinit to ensure data is initialized at runtime. In addition, we had to manually map some `.data` symbols in the `_bss` region. 2. CBFS cache is currently not supported in pre-memory stages and enabling it would require to add an initialization function and find a generic spot to call it. Other platforms do not have that limitation. Hence, resolving it would help to align code and reduce compilation based restriction (cf. the use of `ENV_HAS_DATA_SECTION` compilation flag in various places of coreboot code). We identified three cases to consider: 1. eXecute-In-Place pre-memory stages - code is in SPINOR - data is also stored in SPINOR but must be linked in Cache-As-RAM and copied there at runtime 2. `bootblock` stage is a bit different as it uses Cache-As-Ram but the memory mapping and its entry code different 3. pre-memory stages loaded in and executed from Cache-As-RAM (cf. `CONFIG_NO_XIP_EARLY_STAGES`). eXecute-In-Place pre-memory stages (#1) require the creation of a new ELF segment as the code segment Virtual Memory Address and Load Memory Address are identical but the data needs to be linked in cache-As-RAM (VMA) but to be stored right after the code (LMA). Here is the output `readelf --segments` on a `romstage.debug` ELF binary. Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align LOAD 0x000080 0x02000000 0x02000000 0x21960 0x21960 R E 0x20 LOAD 0x0219e0 0xfefb1640 0x02021960 0x00018 0x00018 RW 0x4 Section to Segment mapping: Segment Sections... 00 .text 01 .data Segment 0 `VirtAddr` and `PhysAddr` are at the same address while they are totally different for the Segment 1 holding the `.data` section. Since we need the data section `VirtAddr` to be in the Cache-As-Ram and its `PhysAddr` right after the `.text` section, the use of a new segment is mandatory. `bootblock` (#2) also uses this new segment to store the data right after the code and load it to Cache-As-RAM at runtime. However, the code involved is different. Not eXecute-In-Place pre-memory stages (#3) do not really need any special work other than enabling a data section as the code and data VMA / LMA translation vector is the same. TEST=#1 and #2 verified on rex and qemu 32 and 64 bits: - The `bootblock.debug`, `romstage.debug` and `verstage.debug` all have data stored at the end of the `.text` section and code to copy the data content to the Cache-As-RAM. - The CBFS stages included in the final image has not improperly relocated any of the `.data` section symbol. - Test purposes global data symbols we added in bootblock, romstage and verstage are properly accessible at runtime #3: for "Intel Apollolake DDR3 RVP1" board, we verified that the generated romstage ELF includes a .data section similarly to a regular memory enabled stage. Change-Id: I030407fcc72776e59def476daa5b86ad0495debe Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/77289 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2023-08-05src/*/post_code.h: Change post code prefix to POSTCODEYuchen He
The prefix POSTCODE makes it clear that the macro is a post code. Hence, replace related macros starting with POST to POSTCODE and also replace every instance the macros are invoked with the new name. The files was changed by running the following bash script from the top level directory. header="src/soc/amd/common/block/include/amdblocks/post_codes.h \ src/include/cpu/intel/post_codes.h \ src/soc/intel/common/block/include/intelblocks/post_codes.h" array=`grep -r "#define POST_" $header | \ tr '\t' ' ' | cut -d ":" -f 2 | cut -d " " -f 2` for str in $array; do splitstr=`echo $str | cut -d '_' -f2-` grep -r $str src | cut -d ':' -f 1 | \ xargs sed -i'' -e "s/$str/POSTCODE_$splitstr/g" done Change-Id: Id2ca654126fc5b96e6b40d222bb636bbf39ab7ad Signed-off-by: Yuchen He <yuchenhe126@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/76044 Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
2023-06-23commonlib/console/post_code.h: Change post code prefix to POSTCODElilacious
The prefix POSTCODE makes it clear that the macro is a post code. Hence, replace related macros starting with POST to POSTCODE and also replace every instance the macros are invoked with the new name. The files was changed by running the following bash script from the top level directory. sed -i'' '30,${s/#define POST/#define POSTCODE/g;}' \ src/commonlib/include/commonlib/console/post_codes.h; myArray=`grep -e "^#define POSTCODE_" \ src/commonlib/include/commonlib/console/post_codes.h | \ grep -v "POST_CODES_H" | tr '\t' ' ' | cut -d ' ' -f 2`; for str in ${myArray[@]}; do splitstr=`echo $str | cut -d '_' -f2-` grep -r POST_$splitstr src | \ cut -d ':' -f 1 | xargs sed -i'' -e "s/POST_$splitstr/$str/g"; grep -r "POST_$splitstr" util/cbfstool | \ cut -d ':' -f 1 | xargs sed -i'' -e "s/POST_$splitstr/$str/g"; done Change-Id: I25db79fa15f032c08678f66d86c10c928b7de9b8 Signed-off-by: lilacious <yuchenhe126@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/76043 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Subrata Banik <subratabanik@google.com>
2022-12-16cpu/intel: Fix clearing MTRR for clang 64bitArthur Heymans
Clang generates R_X86_64_32S symbols that get truncated. TESTED: - prodrive/hermes boots with GCC and clang - MTRR are properly cleared (tested by filling in both MTRR_FIX_64K_00000 and MTRR_FIX_4K_F8000 before clearing) Change-Id: I6a5139f7029b6f35b44377f105dded06f6d9cbf9 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/69388 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
2022-11-23cpu/intel/car: Define post codesMartin Roth
This moves a lot of post code values, but unifies them between platforms, so that the same value means the same thing as much as possible. The P4-netburst code was the most extensive and most different, so that dictated the majority of the values. Three were two values there that didn't match the other files, so those two values, 0x22 & 0x29 have duplicate entries in the table. The rest of the entries are similar between platforms, though the values for many of them were moved to match the P4-netburst values. POST_BOOTBLOCK and POST_POSTCAR values are intended to eventually become global, while POST_SOC would be specific to the Intel platforms. Signed-off-by: Martin Roth <gaumless@gmail.com> Change-Id: If13e40b700a41d56bca85510d68da0ab31a235a9 Reviewed-on: https://review.coreboot.org/c/coreboot/+/69866 Reviewed-by: Subrata Banik <subratabanik@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2021-07-06cpu/intel/car/p4: Add x86_64 supportArthur Heymans
Change-Id: I77516e3cd5f0d3b7442be660c005a65b00454343 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/56021 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Rudolph <siro@das-labor.org>
2021-07-05cpu/intel/car/p4-netburst: Prepare for x86_64Arthur Heymans
Use proper car symbols. Change-Id: I169fd6020e5b81da66dbe4fe83ba446eedc882e9 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/56018 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2021-01-07arch/x86: Move prologue to .init sectionKyösti Mälkki
For arch/x86 the realmode part has to be located within the same 64 KiB as the reset vector. Some older intel platforms also require 4 KiB alignment for _start16bit. To enforce the above, and to separate required parts of .text without matching *(.text.*) rules in linker scripts, tag the pre-C environment assembly code with section .init directive. Description of .init section for ELF: This section holds executable instructions that contribute to the process initialization code. When a program starts to run, the system arranges to execute the code in this section before calling the main program entry point (called main for C programs). Change-Id: If32518b1c19d08935727330314904b52a246af3c Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/47599 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-06-15cpu/intel: Remove obsolete comment in CAR setupKyösti Mälkki
A looong time ago when cache_as_ram.S was built into romstage, the stage was also linked twice. First at a fixed low address and then again relocated at the final execute-in-place address. Change-Id: Ic624feef6794f2c24e38459a45583d84fc07a484 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/42347 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2020-06-13cpu/intel/car: Use symbols for CAR MTRR setupKyösti Mälkki
Change-Id: I32d7337ccf8005c7fb65d2efea40c122093d4dd9 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/30873 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
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>
2020-04-04src/cpu: Use SPDX for GPL-2.0-only filesAngel Pons
Done with sed and God Lines. Only done for C-like code for now. Change-Id: I2adf28d805fe248d55a9514f74c38280c0ad9a78 Signed-off-by: Angel Pons <th3fanbus@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/40049 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
2019-11-15nb/intel/i945: Move to C_ENVIRONMENT_BOOTBLOCKArthur Heymans
Console init in bootblock will be done in a separate CL. Change-Id: Ia2405013f262d904aa82be323e928223dbb4296c Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/36795 Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2019-11-12arch/x86/car.ld: Rename suffix _start/_endArthur Heymans
This is more in line with how linker symbol for regions are defined. Change-Id: I0bd7ae59a27909ed0fd38e6f7193816cb57e76af Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/36695 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2019-11-04cpu/intel/car/p4-netburst: Remove delay loopsKyösti Mälkki
While commented as 10 ms + 250 us, those delay loops actually accounted for a total of 840 ms. And they seem unnecessary as followup code has potentially infinite retries when polling for status changes. Tested on aopen/dxplplusu, dual-socket P4 Xeon HT model_f2x. Change-Id: Ib7d1d66ed29c62d97073872f0b7809d719ac2324 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/36595 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2019-10-28cpu/intel/car: Correctly cache the bootblock with C_ENVIRONMENT_BOOTBLOCKArthur Heymans
With CONFIG_C_ENVIRONMENT_BOOTBLOCK it makes more sense to rely on the size of the bootblock over CONFIG_XIP_ROM_SIZE. To make this work, only powers of 2 are allowed as bootblock size. Change-Id: Ic8104ca9c51e4d2eccdb277e4c2111d2da662f3e Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/35990 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2019-09-10AUTHORS: Move src/cpu/intel copyrights into AUTHORS fileMartin Roth
As discussed on the mailing list and voted upon, the coreboot project is going to move the majority of copyrights out of the headers and into an AUTHORS file. This will happen a bit at a time, as we'll be unifying license headers at the same time. Signed-off-by: Martin Roth <martin@coreboot.org> Change-Id: I39f52764dc377c25953ef5dba16982a0b4637cdb Reviewed-on: https://review.coreboot.org/c/coreboot/+/35181 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: David Guckian Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2019-03-08coreboot: Replace all IS_ENABLED(CONFIG_XXX) with CONFIG(XXX)Julius Werner
This patch is a raw application of find src/ -type f | xargs sed -i -e 's/IS_ENABLED\s*(CONFIG_/CONFIG(/g' Change-Id: I6262d6d5c23cabe23c242b4f38d446b74fe16b88 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/31774 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2019-02-10cpu/intel/car/*/cache_as_ram.S: Add brackets around operandArthur Heymans
Change-Id: I644c38c9b8383db25a970dc7a5ec8765980298ed Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/31291 Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2019-01-17cpu/intel/car: Remove unneeded white spaceElyes HAOUAS
Change-Id: Ib711560838ee0b5cd317ec573e97c4004751d3ff Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/30952 Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2019-01-13arch/x86: Drop Kconfig AP_SIPI_VECTORKyösti Mälkki
This was used to check romcc-built bootblock and romstage agree about the location of 16-bit entrypoint. There was no need to customize it as bootblock size requirement did not grow. Just check for a fixed location at 4 GiB - 4 KiB. With C_ENVIRONMENT_BOOTBLOCK we can have a proper symbol for the purpose, since it appears in the same compilation unit. It will adjust if C_ENV_BOOTBLOCK_SIZE changes. Change-Id: I93f3c37e78ba587455c804de8c57e7e06832a81f Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/30854 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2019-01-13cpu/intel/car/p4: Update microcode in CAR setupArthur Heymans
This updates the BSP microcode during CAR setup. Change-Id: I87d34cf38dbd700ecb04d87c5b4767910e4a922c Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/30682 Reviewed-on: https://review.coreboot.org/c/30777 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2019-01-08cpu/intel/car: Prepare for C_ENVIRONMENT_BOOTBLOCKKyösti Mälkki
Pass timestamps and BIST to romstage using the same signature as C_ENVIRONMENT_BOOTBLOCK will. Change-Id: Ic90da6b1b5ac3b56c69b593ba447ed8e05c8a4e2 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/30492 Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-10-04cpu/intel/car: Fix typoElyes HAOUAS
Change-Id: If71ab647f012a735c6aa6939463414407757ab9a Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/28805 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
2018-09-18cpu/*/car: fix ancient URL explaining XIP range run-time calculationStefan Tauner
Change-Id: I49526b6aafb516a668b7b5e983a0372e3d26a8fc Signed-off-by: Stefan Tauner <stefan.tauner@gmx.at> Reviewed-on: https://review.coreboot.org/28216 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2018-08-13cpu/intel/car: Align the stack to 16 bytes before romstage_mainArthur Heymans
Change-Id: I1415c18779bc481fdec5f72f83c06a58ce6d5c39 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/26797 Reviewed-by: Patrick Georgi <pgeorgi@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2018-06-27cpu/intel/p4-netburst: skip caching rom on model_fxxArthur Heymans
An unidentified combination of speculative reads and branch predictions inside WRPROT-cacheable memory can cause invalidation of cachelines and loss of stack on models based on NetBurst microarchitecture. Therefore disable WRPROT region entirely for all family F models. As an extreme example, just changing the location of a constant string passed to printk() has been witnessed to make a the boot fail early on in romstage. Change-Id: I1df84ad55e2d8d6d4e8dca10125131b5f525f0d7 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/27133 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2018-06-27x86/car: Replace reference of copy_and_run locationKyösti Mälkki
For cases with POSTCAR_STAGE=y this reference pulled in the implementation of run_ramstage() which we would not call. Using _program results with the same region being marked as WRPROT-cacheble. Change-Id: Ie1eaf6f5bb8baa13e946112c4fc3d854dbf750a3 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/27232 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Keith Hui <buurin@gmail.com>
2018-06-02cpu/intel/car: Prepare for some POSTCAR_STAGE supportKyösti Mälkki
The file cache_as_ram_ht.inc is used across a variety of CPUs and northbridges. We need to split it anyway for future C_ENVIRONMENT_BOOTBLOCK and verstage work. Split and rename the files, remove code that is globally implemented in POSTCAR_STAGE framework already. Change-Id: I2ba67772328fce3d5d1ae34c36aea8dcdcc56b87 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/26747 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
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