This adds ACPI S3 (suspend to ram) resume capability in U-Boot.
With S3 support within U-Boot, the board wakes up and resumes to
OS very quickly.
This so far is enabled and tested on Intel MinnowMax board. Please
check README.x86 for how to test it with a plain Linux kernel.
Linux (w/ or w/o SeaBIOS) and Windows 10 (w/ SeaBIOS) were tested.
This series is available for testing at u-boot-x86/s3-working.
Changes in v2:
- fixed several nits in CONFIG_HAVE_ACPI_RESUME Kconfig help text
- return -EINVAL instead of -1 in acpi_sleep_from_pm1()
- add a function comment block for acpi_sleep_from_pm1()
- add a function comment block for acpi_ss_string()
- use a string array for sleep state string
- add a description for gd->arch.prev_sleep_state
- change to use debug() in default_print_cpuinfo()
- add brackets around the second x in RELOCATED(x) macro
- word-wrap to use more columns
- change to use present tense in the comments
- add a function comment block for acpi_find_wakeup_vector()
- add a function comment block for fsp_save_s3_stack()
- check error on calling rtc_write32()
- add some comments about why calling cmos_read32() instead of rtc_
- new patch "Do not clear high table area for S3"
- drop patch "x86: fsp: Mark the first 64K low memory as reserved"
as it causes boot failure on GRUB
- add a function comment block for enter_acpi_mode()
- add a function comment block for acpi_find_fadt()
- new patch "Fix Windows S3 resume failure"
- add some notes about testing S3 resume on Windows
- rebase on u-boot/master
Bin Meng (22):
x86: acpi: Add Kconfig option and header file for ACPI resume
x86: baytrail: acpi: Add APIs for determining/clearing sleep state
x86: Add post codes for OS resume
x86: fsp: acpi: Pass different boot mode to FSP init
x86: Store and display previous sleep state
x86: baytrail: Conditionally report S3 in the ACPI table
x86: fsp: Mark memory used by U-Boot as reserved in the E820 table for
S3
x86: acpi: Add wake up assembly stub
x86: acpi: Add one API to find OS wakeup vector
x86: acpi: Resume OS if resume vector is found
x86: Add an early CMOS access library
x86: fsp: Save stack address to CMOS for next S3 boot
x86: Do not clear high table area for S3
x86: Adjust board_final_cleanup() order
x86: apci: Change PM1_CNT register access to RMW
x86: acpi: Make enter_acpi_mode() public
x86: acpi: Refactor acpi_resume()
x86: acpi: Turn on ACPI mode for S3
x86: pci: Allow conditionally run VGA rom in S3
x86: acpi: Fix Windows S3 resume failure
x86: minnowmax: Enable ACPI S3 resume
x86: Document ACPI S3 support
arch/x86/Kconfig | 32 +++++
arch/x86/cpu/Makefile | 1 +
arch/x86/cpu/baytrail/acpi.c | 47 ++++++++
arch/x86/cpu/cpu.c | 30 ++++-
arch/x86/cpu/wakeup.S | 78 ++++++++++++
arch/x86/include/asm/acpi_s3.h | 131 +++++++++++++++++++++
arch/x86/include/asm/acpi_table.h | 28 +++++
.../include/asm/arch-baytrail/acpi/sleepstates.asl | 2 +
arch/x86/include/asm/arch-baytrail/iomap.h | 24 ++++
arch/x86/include/asm/cmos_layout.h | 31 +++++
arch/x86/include/asm/early_cmos.h | 43 +++++++
arch/x86/include/asm/global_data.h | 4 +
arch/x86/include/asm/post.h | 2 +
arch/x86/include/asm/tables.h | 1 +
arch/x86/include/asm/u-boot-x86.h | 13 ++
arch/x86/lib/Makefile | 2 +
arch/x86/lib/acpi_s3.c | 82 +++++++++++++
arch/x86/lib/acpi_table.c | 84 ++++++++++++-
arch/x86/lib/coreboot_table.c | 7 +-
arch/x86/lib/early_cmos.c | 51 ++++++++
arch/x86/lib/fsp/fsp_common.c | 63 +++++++++-
arch/x86/lib/fsp/fsp_dram.c | 12 ++
configs/minnowmax_defconfig | 1 +
doc/README.x86 | 24 +++-
drivers/pci/pci_rom.c | 14 +++
25 files changed, 795 insertions(+), 12 deletions(-)
create mode 100644 arch/x86/cpu/wakeup.S
create mode 100644 arch/x86/include/asm/acpi_s3.h
create mode 100644 arch/x86/include/asm/cmos_layout.h
create mode 100644 arch/x86/include/asm/early_cmos.h
create mode 100644 arch/x86/lib/acpi_s3.c
create mode 100644 arch/x86/lib/early_cmos.c
--
2.9.2
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