From da45838120b4392e516c0bcc1ccc975d831101c9 Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Tue, 12 Feb 2019 11:31:02 +0100 Subject: [PATCH] RISC-V: Add early startup code On entry, we need to save the system table pointer as well as our image handle. Add an early startup file that saves them and then brings us into our main function. Signed-off-by: Alexander Graf Reviewed-by: Alistair Francis Reviewed-by: Bin Meng Tested-by: Bin Meng Reviewed-by: Daniel Kiper --- grub-core/kern/riscv/efi/startup.S | 48 ++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 grub-core/kern/riscv/efi/startup.S diff --git a/grub-core/kern/riscv/efi/startup.S b/grub-core/kern/riscv/efi/startup.S new file mode 100644 index 000000000..f2a7b2b1e --- /dev/null +++ b/grub-core/kern/riscv/efi/startup.S @@ -0,0 +1,48 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2018 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see . + */ + +#include + +#if __riscv_xlen == 64 +#define sl sd +#define ll ld +#else +#define sl sw +#define ll lw +#endif + + + .file "startup.S" + .text +FUNCTION(_start) + /* + * EFI_SYSTEM_TABLE and EFI_HANDLE are passed in a1/a0. + */ + + ll a2, efi_image_handle_val + sl a0, 0(a2) + ll a2, efi_system_table_val + sl a1, 0(a2) + ll a2, grub_main_val + jr a2 +grub_main_val: + .quad EXT_C(grub_main) +efi_system_table_val: + .quad EXT_C(grub_efi_system_table) +efi_image_handle_val: + .quad EXT_C(grub_efi_image_handle)