u-boot.git/include/acpi, branch v2025.01

arm: cpu: Add ACPI parking protocol support

2024-10-27T23:24:13+00:00

On Arm platforms that use ACPI they cannot rely on the "spin-table"
CPU bringup usually defined in the FDT. Thus implement the
'ACPI Multi-processor Startup for ARM Platforms', also referred to as
'ACPI parking protocol'.

The ACPI parking protocol works similar to the spin-table mechanism, but
the specification also covers lots of shortcomings of the spin-table
implementations.

Every CPU defined in the ACPI MADT table has it's own 4K page where the
spinloop code and the OS mailbox resides. When selected the U-Boot board
code must make sure that the secondary CPUs enter u-boot after relocation
as well, so that they can enter the spinloop code residing in the ACPI
parking protocol pages.

The OS will then write to the mailbox and generate an IPI to release the
CPUs from the spinloop code.

For now it's only implemented on ARMv8, but can easily be extended to
other platforms, like ARMv7.

TEST: Boots all CPUs on qemu-system-aarch64 -machine raspi4b

Signed-off-by: Patrick Rudolph 
Reviewed-by: Simon Glass 
Cc: Simon Glass 
Cc: Tom Rini

acpi: Add processor device

2024-10-27T23:24:13+00:00

Add a new method to write the processor device identified by _HID
ACPI0007, that is preferred over the Processor OpCode since ACPI 6.0.

Fixes booting arm using ACPI only since the Processor OpCode isn't
found valid by the Linux kernel.

Signed-off-by: Patrick Rudolph 
Reviewed-by: Simon Glass 
Cc: Simon Glass

acpi: Move function prototype

2024-10-27T23:24:13+00:00

Allow other architectures to use acpi_create_mcfg_mmconfig as well
by moving the function prototype to common code.

Signed-off-by: Patrick Rudolph 
Reviewed-by: Simon Glass 
Cc: Simon Glass

acpi: acpi_table: Add IORT support

2024-10-27T23:24:13+00:00

The SoC can implement acpi_fill_iort to update the IORT table.
Add a helper function to fill out the NAMED_COMPONENT node.

TEST=Run FWTS V24.03.00 on RPi4 and round no problems.

Signed-off-by: Patrick Rudolph 
Reviewed-by: Simon Glass 
Cc: Simon Glass

acpi: Add ACPITAB for PPTT and GTDT

2024-10-27T23:24:13+00:00

Return the ACPI table revision in acpi_get_table_revision() for
PPTT and GTDT. Match both to ACPI 6.2.

Signed-off-by: Patrick Rudolph 
Reviewed-by: Simon Glass 
Cc: Simon Glass

acpi: acpi_table: Bump revisions

2024-10-27T23:24:13+00:00

The FADT structure found in U-Boot represents FADT revision 6 and the
GICC and GICD structures defined in U-Boot are based on ACPI revision
6.3.

Bump the table revision to fix FWTS failures seen on aarch64.

Signed-off-by: Patrick Rudolph 
Reviewed-by: Simon Glass 
Cc: Simon Glass 
Cc: Bin Meng

arm: acpi: Add generic ACPI methods

2024-10-27T23:24:13+00:00

Add generic ACPI code to generate
- MADT GICC
- MADT GICD
- MADT GICR
- MADT GIC ITS
- PPTT processor
- PPTT cache

as commonly used on arm platforms.

Signed-off-by: Patrick Rudolph 
Reviewed-by: Simon Glass 
Cc: Tom Rini 
Cc: Simon Glass

acpi: Add define for GTDT

2024-10-27T23:24:13+00:00

Add the interrupt flag used in ACPI GTDT table as define.

Signed-off-by: Patrick Rudolph 
Reviewed-by: Simon Glass 
Cc: Simon Glass 
Reviewed-by: Moritz Fischer

acpi: Fix typo

2024-10-27T23:12:45+00:00

Rename ACPI tables MADR to MADT.

Signed-off-by: Patrick Rudolph 
Reviewed-by: Simon Glass 
Cc: Simon Glass

acpi: x86: Move MADT to common code

2024-10-27T23:12:44+00:00

Write MADT in common code and let the SoC fill out the body by
calling acpi_fill_madt() which must be implemented at SoC level.

Signed-off-by: Patrick Rudolph 
Reviewed-by: Simon Glass 
Cc: Simon Glass 
Cc: Bin Meng