diff options
| author | Simon Glass <sjg@chromium.org> | 2020-09-22 12:45:10 -0600 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2020-09-25 11:27:17 +0800 |
| commit | f37979e7b75e1290e9756c3e964a85ef8b10c3c7 (patch) | |
| tree | 0c3d6f10e90c19e57f367cb6ab0327e65d59b883 /include/acpi | |
| parent | d2628984b7831b26d8f9ac25c966d6151df7a929 (diff) | |
x86: acpi: Support generation of the DBG2 table
Add an implementation of the DBG2 (Debug Port Table 2) ACPI table.
Adjust one of the header includes to be in the correct order, before
adding more.
Note that the DBG2 table is generic but the PCI UART is x86-specific at
present since it assumes an ns16550 UART. It can be generalised later
if necessary.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include/acpi')
| -rw-r--r-- | include/acpi/acpi_table.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/include/acpi/acpi_table.h b/include/acpi/acpi_table.h index f8140446a5..c826a797f5 100644 --- a/include/acpi/acpi_table.h +++ b/include/acpi/acpi_table.h @@ -448,6 +448,29 @@ struct __packed acpi_dmar { #define ACPI_DBG2_UNKNOWN 0x00FF +/* DBG2: Microsoft Debug Port Table 2 header */ +struct __packed acpi_dbg2_header { + struct acpi_table_header header; + u32 devices_offset; + u32 devices_count; +}; + +/* DBG2: Microsoft Debug Port Table 2 device entry */ +struct __packed acpi_dbg2_device { + u8 revision; + u16 length; + u8 address_count; + u16 namespace_string_length; + u16 namespace_string_offset; + u16 oem_data_length; + u16 oem_data_offset; + u16 port_type; + u16 port_subtype; + u8 reserved[2]; + u16 base_address_offset; + u16 address_size_offset; +}; + /* SPCR (Serial Port Console Redirection table) */ struct __packed acpi_spcr { struct acpi_table_header header; @@ -523,6 +546,23 @@ int acpi_get_table_revision(enum acpi_tables table); int acpi_create_dmar(struct acpi_dmar *dmar, enum dmar_flags flags); /** + * acpi_create_dbg2() - Create a DBG2 table + * + * This table describes how to access the debug UART + * + * @dbg2: Place to put information + * @port_type: Serial port type (see ACPI_DBG2_...) + * @port_subtype: Serial port sub-type (see ACPI_DBG2_...) + * @address: ACPI address of port + * @address_size: Size of address space + * @device_path: Path of device (created using acpi_device_path()) + */ +void acpi_create_dbg2(struct acpi_dbg2_header *dbg2, + int port_type, int port_subtype, + struct acpi_gen_regaddr *address, uint32_t address_size, + const char *device_path); + +/** * acpi_fill_header() - Set up a new table header * * This sets all fields except length, revision, checksum and aslc_revision |