diff options
Diffstat (limited to 'board/google/common')
-rw-r--r-- | board/google/common/Makefile | 7 | ||||
-rw-r--r-- | board/google/common/early_init.S | 29 |
2 files changed, 36 insertions, 0 deletions
diff --git a/board/google/common/Makefile b/board/google/common/Makefile new file mode 100644 index 0000000..b38bc14 --- /dev/null +++ b/board/google/common/Makefile @@ -0,0 +1,7 @@ +# +# Copyright (c) 2014 Google, Inc +# +# SPDX-License-Identifier: GPL-2.0+ +# + +obj-y += early_init.o diff --git a/board/google/common/early_init.S b/board/google/common/early_init.S new file mode 100644 index 0000000..7017185 --- /dev/null +++ b/board/google/common/early_init.S @@ -0,0 +1,29 @@ +/* + * Copyright (c) 2014 Google, Inc + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +.globl early_board_init +early_board_init: + /* Enable post codes to EC */ +#ifdef CONFIG_EARLY_POST_CROS_EC + mov $0x1b, %ecx + rdmsr + and $0x100, %eax + test %eax, %eax + je 1f + + mov $0x8000f8f0, %eax + mov $0xcf8, %dx + out %eax, (%dx) + mov $0xfed1c001, %eax + mov $0xcfc, %dx + out %eax, (%dx) + mov $0xfed1f410, %esp + mov (%esp), %eax + and $0xfffffffb, %eax + mov %eax, (%esp) +1: +#endif + jmp early_board_init_ret |