diff options
Diffstat (limited to 'src/arch/arm64/stage_entry.S')
| -rw-r--r-- | src/arch/arm64/stage_entry.S | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/src/arch/arm64/stage_entry.S b/src/arch/arm64/stage_entry.S new file mode 100644 index 0000000000..56eca77aae --- /dev/null +++ b/src/arch/arm64/stage_entry.S @@ -0,0 +1,57 @@ +/* + * 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(arm64_el3_startup) + mov x0, xzr + msr SCTLR_EL3, x0 + msr SCR_EL3, x0 + /* Have stack pointer use SP_EL0. */ + msr SPSel, #0 + isb + + /* Load up the stack if non-zero. */ + ldr x0, .stack + cmp x0, #0 + b.eq 1f + mov sp, x0 + 1: + + ldr x1, .entry + br x1 + + .align 4 + /* + * By default branch to main() and initialize the stack according + * to the Kconfig option for cpu0. However, this code can be relocated + * and reused to start up secondary cpus. + */ + .stack: + .quad _estack + .entry: + .quad main +ENDPROC(arm64_el3_startup) +.global arm64_el3_startup_end +arm64_el3_startup_end: + +ENTRY(stage_entry) + b arm64_el3_startup +ENDPROC(stage_entry) |