| Message ID | 20181106175837.9083-6-agraf@suse.de |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Add RISC-V support | expand |
On Tue, 2018-11-06 at 18:58 +0100, Alexander Graf wrote: > 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 <agraf@suse.de> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Alistair > --- > grub-core/kern/riscv/efi/startup.S | 49 > ++++++++++++++++++++++++++++++++++++++ > 1 file changed, 49 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..026f99bab > --- /dev/null > +++ b/grub-core/kern/riscv/efi/startup.S > @@ -0,0 +1,49 @@ > +/* > + * GRUB -- GRand Unified Bootloader > + * Copyright (C) 2013 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 <http://www.gnu.org/licenses/>;. > + */ > + > +#include <grub/symbol.h> > + > +#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) > + _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
diff --git a/grub-core/kern/riscv/efi/startup.S b/grub-core/kern/riscv/efi/startup.S new file mode 100644 index 000000000..026f99bab --- /dev/null +++ b/grub-core/kern/riscv/efi/startup.S @@ -0,0 +1,49 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2013 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 <http://www.gnu.org/licenses/>. + */ + +#include <grub/symbol.h> + +#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) +
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 <agraf@suse.de> --- grub-core/kern/riscv/efi/startup.S | 49 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 grub-core/kern/riscv/efi/startup.S -- 2.12.3 _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel