--- /dev/null
+.. SPDX-License-Identifier: GPL-2.0+:
+
+acpi command
+============
+
+Synopis
+-------
+
+::
+
+ acpi list
+ acpi items [-d]
+ acpi dump <name>
+
+Description
+-----------
+
+The *acpi* command is used to dump the ACPI tables generated by U-Boot for passing
+to the operating systems.
+
+ACPI tables can be generated by various output functions and even devices can
+output material to include in the Differentiated System Description Table (DSDT)
+and SSDT tables (Secondary System Description Table). U-Boot keeps track of
+which device or table-writer produced each piece of the ACPI tables.
+
+The ACPI tables are stored contiguously in memory.
+
+
+acpi list
+~~~~~~~~~
+
+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`_.
+
+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.
+
+The table shows the following information:
+
+Name
+ Table name, e.g. `MCFG`
+
+Base
+ Base address of table in memory
+
+Size
+ Size of table in bytes
+
+Detail
+ More information depending on the table type
+
+ Revision
+ Table revision number (two decimal digits)
+
+ OEM ID
+ ID for the Original Equipment Manufacturer. Typically this is "U-BOOT".
+
+ OEM Table ID
+ Table ID for the Original Equipment Manufacturer. Typically this is
+ "U-BOOTBL" (U-Boot bootloader)
+
+ OEM Revision
+ Revision string for the Original Equipment Manufacturer. Typically this
+ is the U-Boot release number, e.g. 20220101 (meaning v2022.01 since the
+ final 01 is not used). For DSDT, this is set by the source code in
+ the parameters of DefinitionBlock().
+
+ ACPI compiler-vendor ID
+ This is normally `INTL` for Intel
+
+ ACPI compiler revision
+ This is the compiler revision. It is set to the version string for the
+ DSDT table but other tables just use the value 0 or 1, since U-Boot does
+ not actually use the compiler in these cases. It generates the code
+ itself.
+
+acpi items
+~~~~~~~~~~
+
+List the ACPI data that was generated, broken down by item. An item is either
+an ACPI table generated by a writer function, or the part of a table that was
+generated by a particular device.
+
+The `-d` flag also shows a binary dump of the table.
+
+The table shows the following information about each item:
+
+Seq
+ Sequence number in hex
+
+Type
+ Type of item
+
+ ===== ============================================================
+ Type Meaning
+ ===== ============================================================
+ dsdt Fragment of a DSDT table, as generated by a device
+ ssdt Fragment of a SSDT table, as generated by a device
+ other A whole table of a particular type. as generated by a writer
+ ===== ============================================================
+
+Base
+ Base address of table in memory
+
+Size
+ Size of table in bytes
+
+Device / Writer
+ Name of device (for ssdt/dsdt) that wrong this fragment of the table, or
+ name of the registered writer function (otherwise) that wrote the table.
+
+acpi dump
+~~~~~~~~~
+
+Dump a paticular ACPI table in binary format. This can be used to read the table
+if you have the specification handy.
+
+
+Example
+-------
+
+::
+
+ => acpi list
+ Name Base Size Detail
+ ---- -------- ----- ------
+ RSDP 79925000 24 v02 U-BOOT
+ RSDT 79925030 48 v01 U-BOOT U-BOOTBL 20220101 INTL 0
+ XSDT 799250e0 6c v01 U-BOOT U-BOOTBL 20220101 INTL 0
+ FACP 79929570 f4 v04 U-BOOT U-BOOTBL 20220101 INTL 1
+ DSDT 79925280 32ea v02 U-BOOT U-BOOTBL 20110725 INTL 20180105
+ FACS 79925240 40
+ MCFG 79929670 2c v01 U-BOOT U-BOOTBL 20220101 INTL 0
+ SPCR 799296a0 50 v02 U-BOOT U-BOOTBL 20220101 INTL 0
+ TPM2 799296f0 4c v04 U-BOOT U-BOOTBL 20220101 INTL 0
+ APIC 79929740 6c v02 U-BOOT U-BOOTBL 20220101 INTL 0
+ SSDT 799297b0 1523 v02 U-BOOT U-BOOTBL 20220101 INTL 1
+ NHLT 7992ace0 e60 v05 coral coral 3 INTL 0
+ DBG2 7992db40 61 v00 U-BOOT U-BOOTBL 20220101 INTL 0
+ HPET 7992dbb0 38 v01 U-BOOT U-BOOTBL 20220101 INTL 0
+ => acpi items
+ Seq Type Base Size Device/Writer
+ --- ----- -------- ---- -------------
+ 0 other 79925000 240 0base
+ 1 other 79925240 40 1facs
+ 2 dsdt 799252a4 58 board
+ 3 dsdt 799252fc 10 lpc
+ 4 other 79925280 32f0 3dsdt
+ 5 other 79928570 1000 4gnvs
+ 6 other 79929570 100 5fact
+ 7 other 79929670 30 5mcfg
+ 8 other 799296a0 50 5spcr
+ 9 other 799296f0 50 5tpm2
+ a other 79929740 70 5x86
+ b ssdt 799297d4 fe maxim-codec
+ c ssdt 799298d2 28 i2c2@16,0
+ d ssdt 799298fa 270 da-codec
+ e ssdt 79929b6a 28 i2c2@16,1
+ f ssdt 79929b92 28 i2c2@16,2
+ 10 ssdt 79929bba 83 tpm@50
+ 11 ssdt 79929c3d 28 i2c2@16,3
+ 12 ssdt 79929c65 282 elan-touchscreen@10
+ 13 ssdt 79929ee7 285 raydium-touchscreen@39
+ 14 ssdt 7992a16c 28 i2c2@17,0
+ 15 ssdt 7992a194 d8 elan-touchpad@15
+ 16 ssdt 7992a26c 163 synaptics-touchpad@2c
+ 17 ssdt 7992a3cf 28 i2c2@17,1
+ 18 ssdt 7992a3f7 111 wacom-digitizer@9
+ 19 ssdt 7992a508 8f sdmmc@1b,0
+ 1a ssdt 7992a597 4b wifi
+ 1b ssdt 7992a5e2 1a0 cpu@0
+ 1c ssdt 7992a782 1a0 cpu@1
+ 1d ssdt 7992a922 1a0 cpu@2
+ 1e ssdt 7992aac2 211 cpu@3
+ 1f other 799297b0 1530 6ssdt
+ 20 other 7992ace0 2f10 8dev
+ => acpi dump mcfg
+ MCFG @ 79929670
+ 00000000: 4d 43 46 47 2c 00 00 00 01 41 55 2d 42 4f 4f 54 MCFG,....AU-BOOT
+ 00000010: 55 2d 42 4f 4f 54 42 4c 01 01 22 20 49 4e 54 4c U-BOOTBL.." INTL
+ 00000020: 00 00 00 00 00 00 00 00 00 00 00 00 ............
+ => acpi items -d
+ Seq Type Base Size Device/Writer
+ --- ----- -------- ---- -------------
+ 0 other 79925000 240 0base
+ 00000000: 52 53 44 20 50 54 52 20 9e 55 2d 42 4f 4f 54 02 RSD PTR .U-BOOT.
+ 00000010: 30 50 92 79 24 00 00 00 e0 50 92 79 00 00 00 00 0P.y$....P.y....
+ 00000020: a1 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+ 00000030: 52 53 44 54 48 00 00 00 01 8b 55 2d 42 4f 4f 54 RSDTH.....U-BOOT
+ 00000040: 55 2d 42 4f 4f 54 42 4c 01 01 22 20 49 4e 54 4c U-BOOTBL.." INTL
+ 00000050: 00 00 00 00 70 95 92 79 70 96 92 79 a0 96 92 79 ....p..yp..y...y
+ 00000060: f0 96 92 79 40 97 92 79 b0 97 92 79 e0 ac 92 79 ...y@..y...y...y
+ 00000070: 40 db 92 79 b0 db 92 79 00 00 00 00 00 00 00 00 @..y...y........
+ 00000080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+ 00000090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+ 000000a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+ 000000b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+ 000000c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+ 000000d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+ 000000e0: 58 53 44 54 6c 00 00 00 01 61 55 2d 42 4f 4f 54 XSDTl....aU-BOOT
+ 000000f0: 55 2d 42 4f 4f 54 42 4c 01 01 22 20 49 4e 54 4c U-BOOTBL.." INTL
+ 00000100: 00 00 00 00 70 95 92 79 00 00 00 00 70 96 92 79 ....p..y....p..y
+ 00000110: 00 00 00 00 a0 96 92 79 00 00 00 00 f0 96 92 79 .......y.......y
+ 00000120: 00 00 00 00 40 97 92 79 00 00 00 00 b0 97 92 79 ....@..y.......y
+ 00000130: 00 00 00 00 e0 ac 92 79 00 00 00 00 40 db 92 79 .......y....@..y
+ 00000140: 00 00 00 00 b0 db 92 79 00 00 00 00 00 00 00 00 .......y........
+ 00000150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+ 00000160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+ ...
+
+ 1 other 79925240 40 1facs
+ 00000000: 46 41 43 53 40 00 00 00 00 00 00 00 00 00 00 00 FACS@...........
+ 00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+ 00000020: 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+ 00000030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
+
+ 2 dsdt 799252a4 58 board
+ 00000000: 10 87 05 00 5c 00 08 4f 49 50 47 12 8c 04 00 03 ....\..OIPG.....
+ 00000010: 12 8b 01 00 04 01 01 0e ff ff ff ff ff ff ff ff ................
+ 00000020: 0d 49 4e 54 33 34 35 32 3a 30 31 00 12 85 01 00 .INT3452:01.....
+ 00000030: 04 0a 03 01 0a 23 0d 49 4e 54 33 34 35 32 3a 30 .....#.INT3452:0
+ 00000040: 31 00 12 85 01 00 04 0a 04 01 0a 0a 0d 49 4e 54 1............INT
+ 00000050: 33 34 35 32 3a 30 30 00 3452:00.
+
+ 3 dsdt 799252fc 10 lpc
+ 00000000: 10 8f 00 00 5c 00 08 4e 56 53 41 0c 10 50 93 79 ....\..NVSA..P.y
+
+ 4 other 79925280 32f0 3dsdt
+ 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
+
+
+.. _`ACPI specification`: https://uefi.org/sites/default/files/resources/ACPI_6_3_final_Jan30.pdf
projects / u-boot.git / commitdiff
