diff options
Diffstat (limited to 'src/soc/amd/picasso/bootblock/pre_c.S')
| -rw-r--r-- | src/soc/amd/picasso/bootblock/pre_c.S | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/soc/amd/picasso/bootblock/pre_c.S b/src/soc/amd/picasso/bootblock/pre_c.S new file mode 100644 index 0000000000..c478ef80bb --- /dev/null +++ b/src/soc/amd/picasso/bootblock/pre_c.S @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* This file is part of the coreboot project. */ + +#include <cpu/x86/post_code.h> + +/* + * on entry: + * mm0: BIST (ignored) + * mm2_mm1: timestamp at bootblock_protected_mode_entry + */ + +.global bootblock_pre_c_entry +bootblock_pre_c_entry: + post_code(0xa0) + + movl $_eearlyram_stack, %esp + + /* Align the stack and keep aligned for call to bootblock_c_entry() */ + and $0xfffffff0, %esp + sub $8, %esp + + movd %mm2, %eax + pushl %eax /* tsc[63:32] */ + movd %mm1, %eax + pushl %eax /* tsc[31:0] */ + + post_code(0xa2) + + call bootblock_c_entry + /* Never reached */ + +.halt_forever: + post_code(POST_DEAD_CODE) + hlt + jmp .halt_forever |