opensbi.git/firmware/objects.mk, branch v1.3

firmware: Only default FW_PIC to y if supported

2021-07-11T14:33:06Z

Bare-metal GNU ld does not support PIE, so if using it this will result in a failure to build. Instead, default to FW_PIC=n if not supported. Note that an explicit FW_PIC=y is not overridden, to ensure the build fails rather than silently producing a position-dependent binary. Signed-off-by: Jessica Clarke Reviewed-by: Bin Meng Tested-by: Bin Meng Reviewed-by: Anup Patel

firmware: Explicitly pass -pie to the linker, not just the driver

2021-07-11T14:31:56Z

When using Clang with a bare-metal triple, -pie does not get passed to the linker as it's not normally a thing that makes sense, unlike GCC which will unconditionally forward it on and potentially result in a linker error. However, LLD does support it, and manually forwarding it on works as desired, so do so to fully support FW_PIC with Clang and LLD. Signed-off-by: Jessica Clarke Reviewed-by: Bin Meng Tested-by: Bin Meng Reviewed-by: Anup Patel

firmware: Enable FW_PIC by default

2021-04-28T10:08:22Z

Let's have FW_PIC enabled by default so that OpenSBI firmware can by default run from any physical address. Tested with qemu_rv32 & rv64, T-HEAD all hardwares. Suggested-by: Anup Patel Signed-off-by: Guo Ren Tested-by: Guo Ren Reviewed-by: Anup Patel

firmware: Support position independent execution

2021-03-19T09:30:50Z

Enable OpenSBI to support position independent execution. Because the position independent code will cause an additional GOT reference when accessing the global variables, it will reduce performance a bit. Therefore, the position independent execution is disabled by default. Users can through specifying "FW_PIC=y" on the make command to enable this feature. In theory, after enabling position-independent execution, the OpenSBI can run at arbitrary address with appropriate alignment. Therefore, the original relocation mechanism will be skipped. In other words, OpenSBI will directly run at the load address without any code movement. Signed-off-by: Vincent Chen Reviewed-by: Anup Patel

firmware: Remove FW_PAYLOAD_FDT_PATH compile-time option

2020-10-18T04:59:59Z

The FW_PAYLOAD_FDT_PATH compile-time option is replaced by FW_FDT_PATH compile-time option which is more flexible and common across all OpenSBI firmwares. This patch removes FW_PAYLOAD_FDT_PATH and updates related documentation to use FW_FDT_PATH. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

firmware: Add common FW_FDT_PATH compile-time option

2020-10-18T04:58:26Z

Currently, only FW_PAYLOAD has mechanism to embed external FDT using FW_PAYLOAD_FDT_PATH compile-time option. This patch adds a common FW_FDT_PATH compile-time option to embed external FDT for all OpenSBI firmwares (i.e FW_JUMP, FW_PAYLOAD, and FW_DYNAMIC). Signed-off-by: Anup Patel Reviewed-by: Atish Patra

firmware: Remove FW_PAYLOAD_FDT and related documentation

2020-06-05T03:33:05Z

Now that no platform is using FW_PAYLOAD_FDT mechanism, we remove related code from Makefile and related documentation. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

firmware: Add fw_dynamic firmware

2019-05-10T06:56:22Z

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 Reviewed-by: Atish Patra

TOP: Allow building platform out-of-tree

2019-04-09T03:44:09Z

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 /ABC directory along with its config.mk and objects.mk. To build out-of-tree ABC platform from OpenSBI directory: $ make PLATFORM_DIR=/ABC OR $ make PLATFORM_DIR= PLATFORM=ABC To build out-of-tree ABC platform from /ABC directory: $ make PLATFORM_DIR=/ABC -C OR $ make PLATFORM_DIR= PLATFORM=ABC -C Signed-off-by: Anup Patel Reviewed-by: Alistair Francis

firmware: Introduce "options" in "struct sbi_scratch"

2019-03-29T10:19:11Z

Introduce "options" in "struct sbi_scratch" and firmware can update it based on optional compile time flags before calling sbi_init(). Signed-off-by: Bin Meng