diff options
Diffstat (limited to 'src/arch/arm64/spintable_asm.S')
| -rw-r--r-- | src/arch/arm64/spintable_asm.S | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/arch/arm64/spintable_asm.S b/src/arch/arm64/spintable_asm.S new file mode 100644 index 0000000000..3066b7e679 --- /dev/null +++ b/src/arch/arm64/spintable_asm.S @@ -0,0 +1,38 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2014 Google Inc. + * + * This program 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; version 2 of the License. + * + * This program 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 this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <arch/asm.h> + +ENTRY(__wait_for_spin_table_request) + /* Entry here is in EL2 with the magic address in x0. */ + mov x28, x0 +1: + ldr x27, [x28] + cmp x27, xzr + b.ne 2f + wfe + b 1b +2: + /* Entry into the kernel. */ + mov x0, xzr + mov x1, xzr + mov x2, xzr + mov x3, xzr + br x27 +ENDPROC(__wait_for_spin_table_request) |