summaryrefslogtreecommitdiff
path: root/src/cpu/x86/64bit
AgeCommit message (Collapse)Author
2024-06-18cpu/x86: Rename paging structure variables for claritySubrata Banik
The following variables have been renamed: * PDPE_table -> PDPT (Page Directory Pointer Table) * PDE_tables -> PDT (Page Directory Table) This change improves the consistency and clarity of the code as per AMD Architecture Programmer's Manual document. PML4 -> PDPT -> PDT -> 2MB Physical Page TEST=Able to build and boot google/rex64. Change-Id: Ib57d1d54c2c1f4fcce2315b508ed7643251a20c5 Signed-off-by: Subrata Banik <subratabanik@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/83101 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-by: Jérémy Compostella <jeremy.compostella@intel.com>
2024-06-18cpu/x86: Rename `PDE_table` to `PDPT` for 1 GiB page mappingsSubrata Banik
This commit fixes an incorrect variable name in the page table setup for 1 GiB pages. The label PDE_table was used when it should have been PDPT, as it represents a "Page Directory Pointer Table (PDPT)", not a "Page Directory Table (PDT) or PDE_Table". This change ensures correct nomenclature and consistency in the code. PML4 -> PDPT --------> 1GB Physical Page As per x86-64 specification, 1GB pages bypass the Page Directory Table (PDT) level of the page table hierarchy, mapping directly from the Page Directory Pointer (PDPT) Table to the physical page. Change-Id: I1e1064653a265215054f31f0e4e46bf8200ca471 Signed-off-by: Subrata Banik <subratabanik@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/83100 Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jérémy Compostella <jeremy.compostella@intel.com>
2024-06-05cpu/x86: Make 1GB paging the defaultJulius Werner
This patch flips the polarity of CONFIG_USE_1G_PAGES_TLB into CONFIG_NEED_SMALL_2MB_PAGE_TABLES which is off by default, meaning CPUs added in the future will automatically build the smaller 1GB pages. We can expect support for this feature to be available on all future CPU generations (with the possible exception of embedded edge cases), so this default setting should make mistakes less likely and keep maintenance effort lower. (Besides, enabling the support where it doesn't work fails fast, whereas keeping it disabled where it could work is an inefficiency that can easily go overlooked for a long time.) While this is technically a CPU feature, not a northbridge feature, we support a lot more individual CPUs than northbridges in the pre-SoC era, and they tend to be closely coupled anyway. So select the option at the northbridge level for older CPUs to keep things simpler. Change-Id: I2cf1237a7fb63b8904c2a3d57fead162c66bacde Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/82792 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2024-03-28cpu/x86: Link page tables in stage if possibleArthur Heymans
When switching back and forth between 32 to 64 bit mode, for example to call a 32-bits FSP or to call the payload, new page tables in the respective stage will be linked. The advantages of this approach are: - No need to determine a good place for page tables in CBFS that does not overlap. - Works with non memory mapped flash (however all coreboot targets currently do support this) - If later stages can use their own page tables which fits better with the vboot RO/RW flow A disadvantage is that it increases the stage size. This could be improved upon by using 1G pages and generating the pages at runtime. Note: qemu cannot have the page tables in the RO boot medium and needs to relocate them at runtime. This is why keeping the existing code with page tables in CBFS is done for now. TEST: Booted to payload on google/vilbox and qemu/q35 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Change-Id: Ied54b66b930187cba5fbc578a81ed5859a616562 Reviewed-on: https://review.coreboot.org/c/coreboot/+/80337 Reviewed-by: Patrick Rudolph <patrick.rudolph@9elements.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2024-03-19cpu/x86: Use correct config flag for 1GiB page tableBora Guvendik
The commit below uses USE_1G_PAGETABLES config flag instead of the correct USE_1G_PAGES_TLB. "commit ecbc243a45de3b7894e2fe6c8e22b5d07172274b ("cpu/x86: Add 1GiB pages for memory access up to 512GiB")" Signed-off-by: Bora Guvendik <bora.guvendik@intel.com> Change-Id: Ic19812bc1f90cbe7d3739c42a0314b3650e0501d Reviewed-on: https://review.coreboot.org/c/coreboot/+/81343 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-by: Jérémy Compostella <jeremy.compostella@intel.com>
2024-02-08cpu/x86/64bit: Turn jumping to long mode into a macroArthur Heymans
This makes it easier to reuse, e.g. if you want to do it twice in one assembly file. Change-Id: Ida861338004187e4e714be41e17c8447fa4cf935 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/79261 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
2024-02-08cpu/x86: Add 1GiB pages for memory access up to 512GiBAshish Kumar Mishra
Current pagetable implementation allows memory access up to 4GiB using 2MiB pages. If user wants to access more than 4GiB with a 2MiB page it will require more pagetable entries. By using a 1GiB page table, users can access more than 4GiB of memory while reducing the number of pagetable entries. This patch enables memory access up to 512GiB through 1GiB pages by selecting USE_1G_PAGES_TLB in Kconfig. TEST: Verified in 64bit mode boot and access above 4GiB Change-Id: Id569ae5b50abf5b72e4db33b5e4cd802399e76ec Signed-off-by: Ashish Kumar Mishra <ashish.k.mishra@intel.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/80088 Reviewed-by: Wonkyu Kim <wonkyu.kim@intel.com> Reviewed-by: Jérémy Compostella <jeremy.compostella@intel.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2024-01-24cpu: Rename Makefiles from .inc to .mkMartin Roth
The .inc suffix is confusing to various tools as it's not specific to Makefiles. This means that editors don't recognize the files, and don't open them with highlighting and any other specific editor functionality. This issue is also seen in the release notes generation script where Makefiles get renamed before running cloc. Signed-off-by: Martin Roth <gaumless@gmail.com> Change-Id: I552d487978906f5ea74c3d0d85373fe5b2de3f38 Reviewed-on: https://review.coreboot.org/c/coreboot/+/80068 Reviewed-by: Michael Niewöhner <foss@mniewoehner.de> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de> Reviewed-by: Maximilian Brune <maximilian.brune@9elements.com>
2024-01-05arch/x86/include/mode_switch: Add more wrapper functionsPatrick Rudolph
Add a protected mode wrapper function that takes three arguments. This is already supported by the called assembly code. Change-Id: Ia8c91eebae17e4ca27e391454c2d130a71c4c9f3 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/79756 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2024-01-05cpu/x86/64bit/mode_switch2: The reverse function to mode_switchPatrick Rudolph
Add another mode_switch assembly function to call x86_64 code from x86_32 code. This is particullary useful for BLOBs like mrc.bin or FSP that calls back into coreboot. The user must first wrap all functions that are to be called from x86_32 using the macro prot2lm_wrapper. Instead of using the original function the wrapped functions must be passed to the x86_32 BLOBs. The assembly code assume that 0-3 32bit arguments are passed to the wrapped function. Tested: - Called x86_64 code from x86_32 code in qemu. - Booted Lenovo X220 using x86_32 MRC using x86_64 console. Change-Id: Ib625233e5f673eae9f3dcb2d03004c06bb07b149 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/79753 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2024-01-03cpu/x86/64bit/mode_switch: Simplify assembly codePatrick Rudolph
Drop the first argument specifying the number of arguments pushed to the stack. Instead always push the 3 arguments to stack and use the first one as function pointer to call while in protected mode. While on it add more comments and simplify register restore code. Tested: - On qemu can call x86_32 function and pass argument and return value. - Booted Lenovo X220 in x86_64 mode using x86_32 MRC. Change-Id: I30809453a1800ba3c0df60acd7eca778841c520f Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/79752 Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-by: Jérémy Compostella <jeremy.compostella@intel.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2023-08-06cpu: Add SPDX license headers to MakefilesMartin Roth
To help identify the licenses of the various files contained in the coreboot source, we've added SPDX headers to the top of all of the .c and .h files. This extends that practice to Makefiles. Any file in the coreboot project without a specific license is bound to the license of the overall coreboot project, GPL Version 2. This patch adds the GPL V2 license identifier to the top of all makefiles in the cpu directory that don't already have an SPDX license line at the top. Signed-off-by: Martin Roth <gaumless@gmail.com> Change-Id: I3033f2a9eebc75220f7666325857b3ddd60c8f75 Reviewed-on: https://review.coreboot.org/c/coreboot/+/68979 Reviewed-by: Tim Crawford <tcrawford@system76.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Elyes Haouas <ehaouas@noos.fr> Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com> Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
2023-04-04cpu/x86/64bit/Makefile: use all_x86 make targetFelix Held
Use the newly introduced 'all_x86' make target to add the mode_switch.S compilation unit to all stages that run on the x86 cores, but not to verstage on PSP. Signed-off-by: Felix Held <felix-coreboot@felixheld.de> Change-Id: I8950375d31557d9a38169869c1d250417261c31c Reviewed-on: https://review.coreboot.org/c/coreboot/+/74197 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
2023-04-04cpu/x86/64bit/Makefile: use verstage_x86 make targetFelix Held
Use the 'verstage_x86' make target for the mode_switch.S compilation unit instead of making adding it to the 'verstage' target depending on VBOOT_STARTS_BEFORE_BOOTBLOCK not being selected. The only case where VBOOT_STARTS_BEFORE_BOOTBLOCK is selected is the verstage on PSP case, so I find using the 'verstage_x86' target here a bit easier to understand. Signed-off-by: Felix Held <felix-coreboot@felixheld.de> Change-Id: Iab618d4b9e325b07a648b91fcdce99c63644fbfc Reviewed-on: https://review.coreboot.org/c/coreboot/+/74196 Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2022-10-12cpu/x86/64bit: Fix building with -jxArthur Heymans
config.h is a dependency so add it. Change-Id: Iac87039dd43aa75d49766b9a239fbd841ca6850c Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/68244 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Paul Menzel <paulepanter@mailbox.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
2022-04-25cpu/x86/64bit: Generate static page tables from an assembly fileArthur Heymans
This removes the need for a tool to generate simple identity pages. Future patches will link this page table directly into the stages on some platforms so having an assembly file makes a lot of sense. This also optimizes the size of the page of each 4K page by placing the PDPE_table below the PDE. Change-Id: Ia1e31b701a2584268c85d327bf139953213899e3 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/63725 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Raul Rangel <rrangel@chromium.org>
2022-04-25cpu/x86/64bit: Add a separate Makefile.incArthur Heymans
Follow-up patches will add more to this makefile. Change-Id: I8da6265b4c810e39a67f5ec27e26eeb26e3679a4 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/63758 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Raul Rangel <rrangel@chromium.org> Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
2021-12-06x86_64 assembly: Don't touch %gsPatrick Rudolph
With CPU_INFO_V2 enabled %gs holds the pointer to the cpu_info struct, so don't clobber it. Backup and restore %gs where possible. Fixes a crash in MPinit seen after calling FSP-S. Change-Id: If9fc999b34530de5d8b6ad27b9af25fc552e9420 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/59764 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2021-10-05src/acpi to src/lib: Fix spelling errorsMartin Roth
These issues were found and fixed by codespell, a useful tool for finding spelling errors. Signed-off-by: Martin Roth <martin@coreboot.org> Change-Id: I5b8ecdfe75d99028fee820a2034466a8ad1c5e63 Reviewed-on: https://review.coreboot.org/c/coreboot/+/58080 Reviewed-by: Felix Held <felix-coreboot@felixheld.de> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2021-07-06arch/x86: Use ENV_X86_64 instead of _x86_64_Patrick Rudolph
Tested on Intel Sandybridge x86_64 and x86_32. Change-Id: I152483d24af0512c0ee4fbbe8931b7312e487ac6 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/44867 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
2020-12-10cpu/x86/64bit/exit32.inc: Don't invalidate cache in CARPatrick Rudolph
Change-Id: I4a4e988d38b548e1c88ffcc5f5ada2e91ff6ba91 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/48178 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2020-12-05cpu/x86/64bit: Add code to call function in protected modePatrick Rudolph
This adds a helper function for long mode to call some code in protected mode and return back to long mode. The primary use case is to run binaries that have been compiled for protected mode, like the FSP or MRC binaries. Tested on Intel Skylake. The FSP-M runs and returns without error while coreboot runs in long mode. Change-Id: I22af2d224b546c0be9e7295330b4b6602df106d6 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/48175 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2020-12-01cpu/x86/sipi: Add x86_64 supportPatrick Rudolph
Enter long mode on secondary APs. Tested on Lenovo T410 with additional x86_64 patches. Tested on HP Z220 with additional x86_64 patches. Still boots on x86_32. Change-Id: I53eae082123d1a12cfa97ead1d87d84db4a334c0 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/45187 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
2020-08-24Revert "cpu/x86/sipi: Add x86_64 support"Patrick Rudolph
This reverts commit 18ad7fa51f5c6560c9d7a9bcf68e9e277e37cd49. Breaks Mpinit. The log shows: SIPI module has no parameters. MP initialization failure. Change-Id: Ideed19437667124a02c0f03aa7be8dec042d0f44 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/44734 Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-by: Nico Huber <nico.h@gmx.de> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-08-24cpu/x86/sipi: Add x86_64 supportPatrick Rudolph
Enter long mode on secondary APs. Tested on Lenovo T410 with additional x86_64 patches. Tested on HP Z220 with additional x86_64 patches. Still boots on x86_32. Change-Id: I916dd8482d56c7509af9ad0d3b9c28bdc48fd0b1 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/37395 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2020-08-19cpu/x86/64bit/exit32: Add support for ramstagePatrick Rudolph
When compiled in RAMSTAGE use the segments for ramstage. Allows to call this assembly code in ramstage to exit long mode. The next commit makes use of this. Tested on qemu: Still boots on x86_64. Change-Id: I8beb31866bd15afc206b480b1ba05df995adc402 Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/44504 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
2020-07-08cpu/x86/smm: Add support for long modePatrick Rudolph
Enable long mode in SMM handler. x86_32 isn't affected by this change. As the rsm instruction used to leave SMM doesn't restore MSR registers, drop back to protected mode after running the smi_handler and restore IA32_EFER MSR (which enables long mode support) to previous value. NOTE: This commit does NOT introduce a new security model. It uses the same page tables as the remaining firmware does. This can be a security risk if someone is able to manipulate the page tables stored in ROM at runtime. USE FOR TESTING ONLY! Tested on Qemu Q35. Change-Id: I8bba4af4688c723fc079ae905dac95f57ea956f8 Signed-off-by: Patrick Rudolph <siro@das-labor.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/35681 Reviewed-by: Raul Rangel <rrangel@chromium.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.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>
2020-04-04src/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>
2020-03-17src (minus soc and mainboard): Remove copyright noticesPatrick Georgi
They're listed in AUTHORS and often incorrect anyway, for example: - What's a "Copyright $year-present"? - Which incarnation of Google (Inc, LLC, ...) is the current copyright holder? - People sometimes have their editor auto-add themselves to files even though they only deleted stuff - Or they let the editor automatically update the copyright year, because why not? - Who is the copyright holder "The coreboot project Authors"? - Or "Generated Code"? Sidestep all these issues by simply not putting these notices in individual files, let's list all copyright holders in AUTHORS instead and use the git history to deal with the rest. Change-Id: I89b10076e0f4a4b3acd59160fb7abe349b228321 Signed-off-by: Patrick Georgi <pgeorgi@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/39611 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: David Hendricks <david.hendricks@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2019-11-04cpu/qemu-x86: Add x86_64 bootblock supportPatrick Rudolph
Add support for x86_64 bootblock on qemu. Introduce a new approach to long mode support. The previous patch set generated page tables at runtime and placed them in heap. The new approach places the page tables in memory mapped ROM. Introduce a new tool called pgtblgen that creates x86 long mode compatible page tables and writes those to a file. The file is included into the CBFS and placed at a predefined offset. Add assembly code to load the page tables, based on a Kconfig symbol and enter long in bootblock. The code can be easily ported to real hardware bootblock. Tested on qemu q35. Change-Id: Iec92c6cea464c97c18a0811e2e91bc22133ace42 Signed-off-by: Patrick Rudolph <siro@das-labor.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/35680 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-21 06:10:17 +0000