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2019-06-24firmware: Handle overlapping load and link addresses in relocationXiang W1-21/+39
The old code may corrupt the code of the waiting hart hence this patch keeps waiting HART within relocation code range at time of relocation. Signed-off-by: Xiang W <wxjstz@126.com> Acked-by: Anup Patel <anup.patel@wdc.com>
2019-06-19docs: Update docs as per new static library.Atish Patra3-3/+8
Signed-off-by: Atish Patra <atish.patra@wdc.com> Acked-by: Anup Patel <anup.patel@wdc.com>
2019-06-19utils: Remove tinyfdt.cAtish Patra4-373/+14
tinyfdt.c was originally added to provide a minimal implementation of fdt parsing. However, we have already included libfdt in OpenSBI for more complicated operations. Remove tinfdt and replace its functiolity using libfdt. Signed-off-by: Atish Patra <atish.patra@wdc.com> Acked-by: Anup Patel <anup.patel@wdc.com>
2019-06-19platform: Enable all drivers by default.Atish Patra9-50/+6
The drivers and libfdt are built as libsbiutils.a instead of libplatsbi.a. libsbiutils.a are not built per platform specific. Thus, enable all drivers by default. Signed-off-by: Atish Patra <atish.patra@wdc.com> Acked-by: Anup Patel <anup.patel@wdc.com>
2019-06-19lib: Rename string.x to sbi_string.xAtish Patra11-85/+82
All string functions are part of libsbi. It makes more sense to rename them to sbi_string.x as the libsbi can be linked with external libraries that can have similar implementation. Signed-off-by: Atish Patra <atish.patra@wdc.com> Acked-by: Anup Patel <anup.patel@wdc.com>
2019-06-19platform: Move platform common to lib/utils.Atish Patra38-38/+48
Currently, platform/common contains platform/non-platform specific common minimal drivers and libraries. This is helpful is all platforms are built within opensbi framework. Move them to lib/utils so that any external platform code also can reuse the minimalistic drivers or other common libraries. This patch doesn't introduce any functional changes. Signed-off-by: Atish Patra <atish.patra@wdc.com> Acked-by: Anup Patel <anup.patel@wdc.com>
2019-06-19lib: Include helper libc functions directly in libsbi.Atish Patra10-12/+9
libsbi needs some of the custom libc functions. It should be directly included in libsbi instead of platform specific libraries. Signed-off-by: Atish Patra <atish.patra@wdc.com> Acked-by: Anup Patel <anup.patel@wdc.com>
2019-06-19lib: Move sbi core library to lib/sbiAtish Patra22-39/+39
Signed-off-by: Atish Patra <atish.patra@wdc.com> Acked-by: Anup Patel <anup.patel@wdc.com>
2019-06-17firmware: Handle overlapping load and link addresses in relocationXiang W1-2/+42
This patch extends relocation to handle overlapping load and link addresses. The updated relocation will work fine in most cases except when the relocate copy loop itself falls in overlapping load and link addresses. Signed-off-by: Xiang W <wxjstz@126.com> Signed-off-by: Anup Patel <anup.patel@wdc.com>
2019-06-12firmware: Relocate when load address is not equal to link addressAnup Patel4-6/+53
This patch extends fw_base to relocate to link address whenever firmware load address is not equal to link address. The relocation will not work when load start to load end overlap link start to link end. Signed-off-by: Anup Patel <anup.patel@wdc.com> Tested-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
2019-06-12firmware: add missing linker sections to fw_base.ldSLukas Auer1-0/+4
The linker sections .sdata and .sbss are missing from the linker script fw_base.ldS. Add them to the .data and .bss sections. On current builds, most variables are in the .sbss section. They are not correctly initialized to zero, because they are not within the boundaries indicated by _bss_start and _bss_end. Currently, this does not cause any issues, however with relocation support lock-ups may occur due to incorrectly initialized lock variables. Signed-off-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> Acked-by: Anup Patel <anup.patel@wdc.com>
2019-05-31docs: update CONTRIBUTORS.mdKarsten Merker1-0/+2
Add Andreas Schwab to the contributors list. Signed-off-by: Karsten Merker <merker@debian.org> Acked-by: Andreas Schwab <schwab@suse.de>
2019-05-30docs: qemu/sifive_u: miscellaneous documentation fixesBin Meng1-3/+3
- OpenSBI build target should be: qemu/sifive_u - U-Boot config name should be: sifive_fu540_defconfig Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2019-05-30platform: qemu/sifive_u: Update the hart count to 4Bin Meng1-1/+1
Since QEMU commit 8b1d0714bfdd "riscv: sifive_u: Allow up to 4 CPUs to be created", the maximum number of hart for sifive_u is 4. Change our hart count to match that. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2019-05-24lib: Handle page/access fault caused by unpriv load/storeAnup Patel9-44/+131
The unpriv load/store instruction from M-mode can cause page/access fault to M-mode if S-mode page table did not have mappings OR it did not have PMP access permission. To tackle this, we redirect trap back to S-mode if unpriv load/store instruction traps in M-mode. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2019-05-24lib: Add per-HART trap info pointerAnup Patel3-4/+40
This patch adds per-HART trap info pointer which can be used to communicate trap information to sbi_trap_handler(). Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2019-05-24include: Make unprivilege load/store functions as non-inline functionsAnup Patel3-102/+135
Currently, the unprivilege load/store functions are inline functions. We will be extending these functions to track whether a page/access fault occurs when we execute unprivilege load/store instruction. To make things simpler and debugable, we reduce number of places which can potentially generate a page/access fault by making all unprivilege load/store functions as regular (non-inline) functions. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2019-05-24lib: Factor-out TLB management from IPI managementAnup Patel7-207/+292
This patch factor-out TLB management from IPI management to separate sources sbi_tlb.c and sbi_tlb.h. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2019-05-24lib: Add a simple brain-dead allocator to manage extra scratch spaceAnup Patel5-29/+131
We have extra space above scratch space (sbi_scratch) which we are currently using to manage per-HART IPI data and TLB request management. In future, more parts of OpenSBI will use the extra scratch space so it will become difficult to manage extra scratch space using just defines and macros. This patch adds a simple brain-dead allocator to manage extra scratch space. This allocator never expects anything to be free-ed hence it keeps incrementing to next allocation offset until it runs-out of space. In future, we can have more sophisticated allocator which will allow us to re-claim free-ed space and also allows us to track owner of allocated space. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2019-05-21lib: Flush everything when remote TLB flush range is too largeAnup Patel2-4/+18
On latest Linux kernel (i.e. 5.2-rc1), we get large TLB flush request for user space addresses (typically, start=x and end=-1). This is caused by Linux kernel commit a21344dfc6 ("riscv: fix sbi_remote_sfence_vma{,_asid}"). It's not practical to execute large number of sfence instructions for a large TLB flush range because it takes too much time and eventually causes CPU stall in Linux kernel. This patch addresses above issue by upgrading TLB flush range to TLB flush all whenever TLB flush range is greater than 1GB. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2019-05-10docs: Add documentation about dynamic firmwareAnup Patel2-3/+51
This patch adds documenation about dynamic firmware. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2019-05-10platform: Enable dynamic firmware for appropriate platformsAnup Patel4-1/+10
This patch enables FW_DYNAMIC option (i.e. dynamic firmware) for all appropriate/applicable platforms. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
2019-05-10firmware: Add fw_dynamic firmwareAnup Patel4-0/+197
This patch provides first-cut implementation of fw_dynamic firmware. As compared to fw_jump and fw_payload, the fw_dynamic obtains next address, next mode and OpenSBI options from struct fw_dynamic_info. The previous booting stage can create struct fw_dynamic_info in memory and pass address of struct fw_dynamic_info in 'a2' register. Also, the struct fw_dynamic_info has versioning as well so changes to the struct fw_dynamic_info can be done in a backward compatible manner. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2019-05-10firmware: Allow firmwares to provide next mode and optionsAnup Patel3-25/+148
This patch extends existing firmwares (i.e. fw_jump and fw_payload) to explicitly provide next mode and options to fw_base. We also introduce fw_save_info() which is called by fw_base very early on boot HART. This function can be used by existing firmwares (i.e. fw_jump and fw_payload) to save information passed by previous booting stage. Overall, this is a preparatory patch for implementing fw_dynamic. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2019-05-06docs: update CONTRIBUTORS.md from git historyKarsten Merker1-0/+18
OpenSBI has recently gained a CONTRIBUTORS.md file as a way to make contributions to OpenSBI more visible. Add previous contributors from the git history who have acked their inclusion in the list to the file. Signed-off-by: Karsten Merker <merker@debian.org> Acked-by: Alistair Francis <alistair@alistair23.me> Acked-by: Anup Patel <anup.patel@wdc.com> Acked-by: Atish Patra <atish.patra@wdc.com> Acked-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Damien Le Moal <damien.lemoal@wdc.com> Acked-by: Nick Kossifidis <mickflemm@gmail.com> Acked-by: Shawn Chang <citypw@gmail.com> Acked-by: Xiang Wang <wxjstz@126.com>
2019-05-06docs: miscellaneous documentation fixes and updatesKarsten Merker10-141/+146
- fix some broken hyperlinks - add additional hyperlinks to references to external documents - reformat some paragraphs to keep lines under 80 characters - unify the enumeration style between different parts of the documentation - fix spelling/grammar mistakes - extend the copyright notice in README.md to be the same as the one in COPYING.BSD Signed-off-by: Karsten Merker <merker@debian.org> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2019-05-06Update sifive_fu540.mdLoys Ollivier1-1/+1
Fix typo on parenthesis.
2019-04-30Makefile: explicitly disable PIEKarsten Merker1-0/+1
The various available RISC-V toolchains differ in their default configuration regarding PIE, e.g. the buildroot RISC-V toolchain has PIE disabled by default while the Debian toolchain has it enabled by default. OpenSBI currently doesn't support being built with PIE enabled, therefore disable it explicitly by passing "-fno-pie -no-pie" in CFLAGS. Signed-off-by: Karsten Merker <merker@debian.org> Acked-by: Anup Patel <anup.patel@wdc.com>
2019-04-25platform/common/libfdt: fix unnecessary multiple inclusionsXiang Wang1-1/+1
Signed-off-by: Xiang Wang <wxjstz@126.com>
2019-04-25docs: Add a payload section about coreboot support #116Shawn Chang1-0/+24
Signed-off-by: Shawn Chang <citypw@gmail.com>
2019-04-24all: run clang-format and update checked-in filesOlof Johansson59-1017/+956
Noisy commit, no functional changes. Generated with an current upstream clang-format and: clang-format -i $(find . -name \*.[ch]) Signed-off-by: Olof Johansson <olof@lixom.net>
2019-04-24all: Annotate some tables to have clang-format leave them aloneOlof Johansson18-1/+72
One of the shortcomings of clang-format is that it doesn't allow for aligned define tables, which is used for a number of constants. Add annotation to disable the automatic formatting where needed. Signed-off-by: Olof Johansson <olof@lixom.net>
2019-04-24libfdt: don't try to clang-formatOlof Johansson1-0/+1
Add an empty clang-format to disable reformatting of imported code and make it easier to merge in upstream changes of that project over time. Signed-off-by: Olof Johansson <olof@lixom.net>
2019-04-24top: add .clang-formatOlof Johansson1-0/+16
Add a clang-format to automate consistent code formatting. Automating coding style reformatting removes a lot of manual checkpatch-type fixups, and can easily be implemented as a linter in code review environments. Signed-off-by: Olof Johansson <olof@lixom.net>
2019-04-22lib: Redirect unhandled traps from non-M modes to S modeNick Kossifidis1-0/+3
In case we didn't handle a trap with one of the available handlers, check if the trap comes from S or U mode and redirect it to S mode's trap handler. Signed-off-by: Nick Kossifidis <mick@ics.forth.gr>
2019-04-15doc: Update docs as per latest kernel/u-boot status.Atish Patra1-10/+12
All dependant patches are merged in U-Boot and Linux kernel now. Update the unleashed guide to reflect that and fix the documentation about tftp loading path as well. Signed-off-by: Atish Patra <atish.patra@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-04-15top: Add CONTRIBUTORS.md fileAnup Pate3-4/+14
We add CONTRIBUTORS.md file to provide a list of individuals and organizations actively contributing to the OpenSBI project. Signed-off-by: Anup Patel <anup.patel@wdc.com>
2019-04-15docs: qemu/virt platform documentation fixes and updatesKarsten Merker1-11/+80
- Correct the payload address in the RV64 examples that use fw_jump.elf. - Change the qemu console configuration in the examples from "-display none -serial stdio" to "-nographic". This results in qemu handing down a CTRL-C on the emulated console to the VM instead of terminating the qemu process. - Provide examples for RV32. - Various text corrections. Signed-off-by: Karsten Merker <merker@debian.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
2019-04-10lib: Optimize TLB flush IPIsAtish Patra1-0/+73
Simulatenous requests for tlbflush IPIs can have overlapping address ranges. Ignore if address range is same or within already existing fifo entries. Update the tlb flush info in fifo directly if the one of the existing entry lies within the new flush request. Delete all entries if flush all request is recieved for the vma. Signed-off-by: Atish Patra <atish.patra@wdc.com>
2019-04-10lib: Provide a lock enabled iteration of fifo.Atish Patra2-0/+84
Implement a lock enabled iteration for fifo so that caller can determine if next entry can be skipped or any existing entries in fifo can be updated before enqueue. Signed-off-by: Atish Patra <atish.patra@wdc.com>
2019-04-09TOP: Allow building platform out-of-treeAnup Patel4-30/+54
This patch extends our current build-system for building platform sources which are not part of OpenSBI sources. For example: Let's say we have out-of-tree ABC platform sources. We place these sources under <XYZ>/ABC directory along with its config.mk and objects.mk. To build out-of-tree ABC platform from OpenSBI directory: $ make PLATFORM_DIR=<XYZ>/ABC OR $ make PLATFORM_DIR=<XYZ> PLATFORM=ABC To build out-of-tree ABC platform from <XYZ>/ABC directory: $ make PLATFORM_DIR=<XYZ>/ABC -C <path_to_opensbi> OR $ make PLATFORM_DIR=<XYZ> PLATFORM=ABC -C <path_to_opensbi> Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
2019-04-06lib: Fix the ecall macro definitionsAlistair Francis1-2/+2
Fix the ECALL definitions to matc the latest information in the privlidge spec table 5.5. Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2019-04-04firmware: Fix source fdt alignmentXiang Wang1-1/+1
When I tried to start opensbi with coreboot, I found that aligning to a 16-byte boundary would make a copy error. Corrected to align to an machine word length boundary. Signed-off-by: Xiang Wang <wxjstz@126.com>
2019-04-03lib: Pack struct sbi_fifoAnup Patel2-16/+15
This patch reduces memory consumed by struct sbi_fifo by droping redundant "head" member and using u16 in-place of "unsigned long". Signed-off-by: Anup Patel <anup.patel@wdc.com>
2019-04-03lib: More improvements to sbi_fifoAnup Patel4-43/+73
This patch does following improvements to sbi_fifo: 1. Use valid SBI_Exxxx error codes instead of -1 2. The sbi_fifo_is_full() and sbi_fifo_is_empty() did not acquire qlock before accessing head and tail hence fixed it 3. Added avail member for ease in debugging and simplifying head/tail updates. Due to above changes size of sbi_fifo changes from 48 bytes to 56 bytes. Signed-off-by: Anup Patel <anup.patel@wdc.com>
2019-04-03docs: Update mailing list details in contributing.mdAnup Patel1-3/+11
We now have an OpenSBI mailing list available for development and discussiong so update contributing.md accordingly. The Github PR based review and issue tracking will also continue to exist. Signed-off-by: Anup Patel <anup.patel@wdc.com>
2019-04-03lib: Use a fifo to keep track of sfence related IPIs.Atish Patra5-19/+47
Currently, there is no provision for tracking multiple IPIs sent to a single hart at the same time by different harts. Use a fifo manage the outstanding requests. While dequeueing, read all the entries once, because we have only 1 bit to track the type of IPI. Once the queue is full, busy wait until the there is space available in queue. This is not the most elegant approach. It should be changed in favor of a wakeup event once available in opensbi. Signed-off-by: Atish Patra <atish.patra@wdc.com>
2019-04-03lib: Increase the scratch space to 512 bytes.Atish Patra1-1/+1
Currently scratch space per hart is 256 bytes. Increase it to 512 bytes to accomodate ipi queue. Signed-off-by: Atish Patra <atish.patra@wdc.com>
2019-04-03lib: Introduce a tlb info type.Atish Patra1-0/+7
Add a tlb info to distinguish between different type of tlb flush request pending. Signed-off-by: Atish Patra <atish.patra@wdc.com>
2019-04-03lib: Add a fifo implementation.Atish Patra3-0/+118
Implement a fifo to accomodate outstanding IPIs for a specific hart at the same time. Signed-off-by: Atish Patra <atish.patra@wdc.com>
generated by cgit v1.2.3 (git 2.39.0) at 2025-09-20 08:58:59 +0300