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author | Bin Meng <bmeng.cn@gmail.com> | 2017-04-21 07:24:37 -0700 |
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committer | Bin Meng <bmeng.cn@gmail.com> | 2017-05-17 17:11:46 +0800 |
commit | 3a34cae01160d207d50db267585b963cf0a0018d (patch) | |
tree | a6fcaae9a38548e2900bc8e98c0223ff16e20aa9 /arch/x86/lib/acpi_s3.c | |
parent | e76bf38f180b0c9325b17506f1518329d82cbed8 (diff) | |
download | u-boot-3a34cae01160d207d50db267585b963cf0a0018d.zip u-boot-3a34cae01160d207d50db267585b963cf0a0018d.tar.gz u-boot-3a34cae01160d207d50db267585b963cf0a0018d.tar.bz2 |
x86: acpi: Resume OS if resume vector is found
In an S3 resume path, U-Boot does everything like a cold boot except
in the last_stage_init() it jumps to the OS resume vector.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'arch/x86/lib/acpi_s3.c')
-rw-r--r-- | arch/x86/lib/acpi_s3.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/x86/lib/acpi_s3.c b/arch/x86/lib/acpi_s3.c new file mode 100644 index 0000000..f679c06 --- /dev/null +++ b/arch/x86/lib/acpi_s3.c @@ -0,0 +1,26 @@ +/* + * Copyright (C) 2017, Bin Meng <bmeng.cn@gmail.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/acpi_s3.h> +#include <asm/post.h> + +static void asmlinkage (*acpi_do_wakeup)(void *vector) = (void *)WAKEUP_BASE; + +static void acpi_jump_to_wakeup(void *vector) +{ + /* Copy wakeup trampoline in place */ + memcpy((void *)WAKEUP_BASE, __wakeup, __wakeup_size); + + printf("Jumping to OS waking vector %p\n", vector); + acpi_do_wakeup(vector); +} + +void acpi_resume(void *wake_vec) +{ + post_code(POST_OS_RESUME); + acpi_jump_to_wakeup(wake_vec); +} |