From 5e30e45c83264841018dc8135034426fd0c0f857 Mon Sep 17 00:00:00 2001 From: Lukas Auer Date: Wed, 21 Aug 2019 21:14:44 +0200 Subject: spl: support booting via RISC-V OpenSBI RISC-V OpenSBI is an open-source implementation of the RISC-V Supervisor Binary Interface (SBI) specification. It is required by Linux and U-Boot running in supervisor mode. This patch adds support for booting via the OpenSBI FW_DYNAMIC firmware. It supports OpenSBI version 0.4 and higher. In this configuration, U-Boot SPL starts in machine mode. After loading OpenSBI and U-Boot proper, it will start OpenSBI. All necessary parameters are generated by U-Boot SPL and are passed to OpenSBI. U-Boot proper is started in supervisor mode by OpenSBI. Support for OpenSBI is enabled with CONFIG_SPL_OPENSBI. An additional configuration entry, CONFIG_SPL_OPENSBI_LOAD_ADDR, is used to specify the load address of the OpenSBI firmware binary. It is not used directly in U-Boot and instead is intended to make the value available to scripts such as FIT configuration generators. The header file include/opensbi.h is based on header files from the OpenSBI project. They are recent, as of commit bae54f764570 ("firmware: Add fw_dynamic firmware"). Signed-off-by: Lukas Auer Reviewed-by: Bin Meng Tested-by: Bin Meng Reviewed-by: Anup Patel --- include/spl.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/spl.h') diff --git a/include/spl.h b/include/spl.h index a90f971a23..e4640f3830 100644 --- a/include/spl.h +++ b/include/spl.h @@ -374,6 +374,11 @@ void spl_invoke_atf(struct spl_image_info *spl_image); */ void spl_optee_entry(void *arg0, void *arg1, void *arg2, void *arg3); +/** + * spl_invoke_opensbi - boot using a RISC-V OpenSBI image + */ +void spl_invoke_opensbi(struct spl_image_info *spl_image); + /** * board_return_to_bootrom - allow for boards to continue with the boot ROM * -- cgit v1.2.3