diff options
Diffstat (limited to 'doc/usage/cmd/acpi.rst')
| -rw-r--r-- | doc/usage/cmd/acpi.rst | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/doc/usage/cmd/acpi.rst b/doc/usage/cmd/acpi.rst index 14bafc8e35..6b9b8949f3 100644 --- a/doc/usage/cmd/acpi.rst +++ b/doc/usage/cmd/acpi.rst @@ -11,12 +11,14 @@ Synopis acpi list acpi items [-d] acpi dump <name> + acpi set <address> Description ----------- -The *acpi* command is used to dump the ACPI tables generated by U-Boot for passing -to the operating systems. +The *acpi* command is used to dump the ACPI tables generated by U-Boot for +passing to the operating systems. It allows manually setting the address to take +a look at existing ACPI tables. ACPI tables can be generated by various output functions and even devices can output material to include in the Differentiated System Description Table (DSDT) @@ -231,5 +233,28 @@ Example 00000000: 44 53 44 54 ea 32 00 00 02 eb 55 2d 42 4f 4f 54 DSDT.2....U-BOOT 00000010: 55 2d 42 4f 4f 54 42 4c 25 07 11 20 49 4e 54 4c U-BOOTBL%.. INTL +This shows searching for tables in a known area of memory, then setting the +pointer:: + + => acpi list + No ACPI tables present + => ms.s bff00000 80000 "RSD PTR" + bff75000: 52 53 44 20 50 54 52 20 cf 42 4f 43 48 53 20 00 RSD PTR .BOCHS . + 1 match + => acpi set bff75000 + Setting ACPI pointer to bff75000 + => acpi list + Name Base Size Detail + ---- -------- ----- ------ + RSDP bff75000 0 v00 BOCHS + RSDT bff76a63 38 v01 BOCHS BXPC 1 BXPC 1 + FACP bff768ff 74 v01 BOCHS BXPC 1 BXPC 1 + DSDT bff75080 187f v01 BOCHS BXPC 1 BXPC 1 + FACS bff75040 40 + APIC bff76973 90 v01 BOCHS BXPC 1 BXPC 1 + HPET bff76a03 38 v01 BOCHS BXPC 1 BXPC 1 + WAET bff76a3b 28 v01 BOCHS BXPC 1 BXPC 1 + SSDT bff95040 c5 v02 COREv4 COREBOOT 2a CORE 20221020 + .. _`ACPI specification`: https://uefi.org/sites/default/files/resources/ACPI_6_3_final_Jan30.pdf |