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2019-08-09firmware: Use macro instead of magic number for boot statusBin Meng1-4/+7
The boot status is currently hard-coded. Define some macros for it. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
2019-08-09platform: sifive: fu540: Expand FDT size before any patchingBin Meng1-5/+6
We should expand the FDT size before any patching, otherwise it's possible the "status" fix up might fail due to insufficient space. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
2019-08-07firmware: Fix the loop condition of _wait_relocate_copy_done sectionNylon Chen1-1/+1
If core-0 have finished _fdt_reloc_done but any of other cores has not yet left the loop in _wait_relocate_copy_done, they could never leave the loop because _boot_status is not equal to 1.
2019-07-26lib: Allow compiling without FP supportAnup Patel3-13/+16
Currently, we mandate 'F' and 'D' extension in riscv_fp.h so that misaligned load/store emulation has access to FP registers. The above is too restrictive and we should certainly allow compilation for soft-FP toolchains and explicit PLATFORM_RISCV_ISA not having 'F' and 'D' extensions. This patch extends riscv_fp.h and misaligned load/store emulation to allow compiling OpenSBI without FP support. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-25treewide: Use conventional names for 32-bit and 64-bitBin Meng6-15/+15
There are several places in the source tree that have: 32bit, 32 bit, 64bit, 64 bit Fix by using the conventional names with a hyphen. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> Acked-by: Anup Patel <anup.patel@wdc.com>
2019-07-25README: Document 32-bit / 64-bit images buildBin Meng1-0/+19
At present the exact details of building 32-bit or 64-bit OpenSBI images are missing in the docs. This adds the missing part. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de> Acked-by: Anup Patel <anup.patel@wdc.com>
2019-07-25utils: Use cpu_to_fdt32() when writing to fdtGeorg Kotheimer1-1/+1
Although it does not make a functional difference, both cpu_to_fdt32() and fdt32_to_cpu() pass on to CPU_TO_FDT32, we should use cpu_to_fdt32() to be semantically correct. Signed-off-by: Georg Kotheimer <georg.kotheimer@kernkonzept.com> Reviewed-by: Atish Patra <atish.patra@wdc.com> Acked-by: Anup Patel <anup.patel@wdc.com>
2019-07-24platform: sifive/fu540: Move FDT further upAnup Patel1-2/+2
This patch changes FW_xyz_FDT_ADDR to RAM_START+128MB (i.e. 0x88000000) so that next stage bootloader (i.e. U-Boot) has enough space to unpack bigger kernel images. Reported-by: David Abdurachmanov <david.abdurachmanov@sifive.com> Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: David Abdurachmanov <david.abdurachmanov@sifive.com> Tested-by: David Abdurachmanov <david.abdurachmanov@sifive.com>
2019-07-22platform: sifive: fu540: Use standard value string for cpu node statusBin Meng1-1/+2
Per device tree spec, the standard value string for the "status" property of a cpu node is either "okay" or "disabled". "masked" was once used but it is unfortunately a spec violation. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Anup Patel <anup.patel@wdc.com>
2019-07-02include: Bump-up version to 0.4Anup Patel1-1/+1
This patch updates OpenSBI version to 0.4 as part of release preparation. Signed-off-by: Anup Patel <anup.patel@wdc.com>
2019-07-02platform: Remove the HiFive Unleashed expansion board DT.Atish Patra2-603/+0
The Linux kernel will maintain the device tree (DT) for HiFive Unleashed from release v5.2-rc6. This DT is incompatible with previous DT present for Microsemi expansion board in OpenSBI. Since, OpenSBI will directly load the pre-built DTB from kernel now onwards, no need to keep the out-of-date DT in openSBI. Remove this DT and it's related documentation. Signed-off-by: Atish Patra <atish.patra@wdc.com> Acked-by: Anup Patel <anup.patel@wdc.com>
2019-07-01firmware: For no relocation skip two stage wait for secondary HARTsAnup Patel1-0/+1
When relocation is not required (i.e. _load_start == _link_start), we can skip two stage wait for secondary HARTs. This means secondary HARTs can skip the _wait_relocate_copy_done() loop and directly jump to the _wait_for_boot_hart() loop when no relocation not required. Signed-off-by: Anup Patel <anup.patel@wdc.com>
2019-06-30scripts: Add Ariane FPGA to platform list in binary archive scriptAnup Patel1-0/+1
This patch adds Ariane FPGA to RV64 platform list in the binary archive script. Signed-off-by: Anup Patel <anup.patel@wdc.com>
2019-06-30docs: Update the fu540 platform guide for new DT.Atish Patra1-50/+62
With 5.2-rc6 release, Linux kernel hosts the DT for Unleashed board which is incompatible with the default DT from FSBL. Update the document to use the DT from kernel. Signed-off-by: Atish Patra <atish.patra@wdc.com> Acked-by: Anup Patel <anup.patel@wdc.com>
2019-06-29include: Add firmware context to sbi_platformAbner Chang1-0/+4
Add firmware context field struct sbi_platform to carry firmware specific information. Signed-off-by: Abner Chang <abner.chang@hpe.com> Acked-by: Anup Patel <anup.patel@wdc.com>
2019-06-29include: Add version info to struct sbi_platformAbner Chang10-13/+55
Add version control of sbi_platform structure - Add opensbi_version, this gives information of opensbi revision on which the sbi_platform table was created. - Add platform_version field in sbi_platform structure for platform level version control. Signed-off-by: Abner Chang <abner.chang@hpe.com> Acked-by: Anup Patel <anup.patel@wdc.com>
2019-06-29include: Move callbacks in sbi_platform to separate structAbner Chang7-172/+198
Move platform opensbi functions to sbi_platform_operations structure. Both sbi_platform and sbi_platform_operations structures are maintained by platform vendors. Signed-off-by: Abner Chang <abner.chang@hpe.com> Acked-by: Anup Patel <anup.patel@wdc.com>
2019-06-29Add documentation for Ariane FPGA platformPanagiotis Peristerakis2-0/+41
Signed-off-by: Panagiotis Peristerakis <perister@ics.forth.gr>
2019-06-29Add support for Ariane FPGA SoCPanagiotis Peristerakis3-0/+250
This patch adds support for Ariane platform. We needed to enable PLIC interrupts early(like on BBL) due to some issue of the design. Otherwise, Linux would not get any external interrupts. Signed-off-by: Panagiotis Peristerakis <perister@ics.forth.gr>
2019-06-29Changed plic_set_thresh() and plic_set_ie() to publicPanagiotis Peristerakis2-2/+6
Signed-off-by: Panagiotis Peristerakis <perister@ics.forth.gr>
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>
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