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acpi: Support checking checksums

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When the ACPI tables come from an earlier bootloader it is helpful to
see whether the checksums are correct or not. Add a -c flag to the
'acpi list' command to support that.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2025-03-06 09:04:12 -07:00
parent 534439fca1
commit abcfdc2510
3 changed files with 102 additions and 21 deletions
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20
doc/usage/cmd/acpi.rst
View File

@@ -11,7 +11,7 @@ Synopsis
::
acpi list
acpi list [-c]
acpi items [-d]
acpi dump <name>
acpi set <address>
@@ -38,6 +38,9 @@ List the ACPI tables that have been generated. Each table has a 4-character
table name (e.g. SSDT, FACS) and has a format defined by the
`ACPI specification`_.
The `-c` flag tells U-Boot to verify the checksums and print 'OK' or 'BAD' next
to each table.
U-Boot does not currently support decoding the tables. Unlike devicetree, ACPI
tables have no regular schema and also some include bytecode, so decoding the
tables requires a lot of code.
@@ -259,5 +262,20 @@ pointer::
WAET bff76a3b 28 v01 BOCHS BXPC 1 BXPC 1
SSDT bff95040 c5 v02 COREv4 COREBOOT 2a CORE 20221020
This shows checking that the checksums are correct for each table::
=> acpi list -c
Name Base Size Detail
---- ---------------- ----- ----------------------------
RSDP bec9a000 24 v00 BOCHS OK OK
RSDT bec9bd4a 38 v01 BOCHS BXPC 1 BXPC 1 OK
FACP bec9bb46 74 v01 BOCHS BXPC 1 BXPC 1 OK
DSDT bec9a080 1ac6 v01 BOCHS BXPC 1 BXPC 1 OK
FACS bec9a040 40
APIC bec9bbba 78 v03 BOCHS BXPC 1 BXPC 1 OK
HPET bec9bc32 38 v01 BOCHS BXPC 1 BXPC 1 OK
SRAT bec9bc6a b8 v01 BOCHS BXPC 1 BXPC 1 OK
WAET bec9bd22 28 v01 BOCHS BXPC 1 BXPC 1 OK
.. _`ACPI specification`: https://uefi.org/sites/default/files/resources/ACPI_6_3_final_Jan30.pdf