diff options
Diffstat (limited to 'src/mainboard/emulation/qemu-aarch64/bootblock_custom.S')
| -rw-r--r-- | src/mainboard/emulation/qemu-aarch64/bootblock_custom.S | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/mainboard/emulation/qemu-aarch64/bootblock_custom.S b/src/mainboard/emulation/qemu-aarch64/bootblock_custom.S new file mode 100644 index 000000000000..f9e85d0efc55 --- /dev/null +++ b/src/mainboard/emulation/qemu-aarch64/bootblock_custom.S @@ -0,0 +1,36 @@ +/* + * Early initialization code for aarch64 (a.k.a. armv8) + * + * Copyright 2019 Asami Doi <d0iasm.pub@gmail.com> + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include <arch/asm.h> + +ENTRY(_start) + /* Setup CPU. */ + bl arm64_init_cpu + + /* Get code positions. */ + ldr x1, =_flash + ldr x0, =_bootblock + + /* Calculate bootblock size. */ + ldr x2, =_ebootblock + sub x2, x2, x0 + + /* Call memcpy in arch/arm64/memcpy.S */ + bl memcpy + dmb sy + + /* Calculate relocation offset between bootblock in flash and in DRAM. */ + ldr x0, =_flash + ldr x1, =_bootblock + sub x1, x1, x0 + + /* Jump to main() in DRAM. */ + adr x0, main + add x0, x0, x1 + blr x0 +ENDPROC(_start) |