[U-Boot] [PATCH 00/22] x86: Add ACPI S3 resume support

[Bin Meng]

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.
Note testing with Ubuntu or Windows has some issues and fixes are
still being worked out.

This series is available for testing in u-boot-x86/s3-working.


Bin Meng (22):
  dm: rtc: Add 16-bit read/write support
  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: fsp: Mark the first 64K low memory as reserved
  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: 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                                 |  26 ++++-
 arch/x86/cpu/wakeup.S                              |  79 ++++++++++++++
 arch/x86/include/asm/acpi_s3.h                     | 116 +++++++++++++++++++++
 arch/x86/include/asm/acpi_table.h                  |   3 +
 .../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                 |   3 +
 arch/x86/include/asm/post.h                        |   2 +
 arch/x86/include/asm/tables.h                      |   1 +
 arch/x86/include/asm/u-boot-x86.h                  |   1 +
 arch/x86/lib/Makefile                              |   2 +
 arch/x86/lib/acpi_s3.c                             |  34 ++++++
 arch/x86/lib/acpi_table.c                          |  84 ++++++++++++++-
 arch/x86/lib/early_cmos.c                          |  51 +++++++++
 arch/x86/lib/fsp/fsp_common.c                      |  55 +++++++++-
 arch/x86/lib/fsp/fsp_dram.c                        |  24 +++++
 configs/minnowmax_defconfig                        |   1 +
 doc/README.x86                                     |  20 ++--
 drivers/pci/pci_rom.c                              |  14 +++
 drivers/rtc/rtc-uclass.c                           |  30 ++++++
 include/rtc.h                                      |  20 ++++
 26 files changed, 735 insertions(+), 11 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

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2.9.2