diff options
| author | Michael Brown <mcb30@ipxe.org> | 2021-03-01 00:08:23 +0000 |
|---|---|---|
| committer | Michael Brown <mcb30@ipxe.org> | 2021-03-01 00:08:23 +0000 |
| commit | 9776f6ece1104cc32de3249844a8a7387112f32f (patch) | |
| tree | b5916d250368fc66575bb000c51f5a7c7b0e203d /src/include/ipxe/acpi.h | |
| parent | d175936b78abc2b137a5a1e66ad7cf79b5849058 (diff) | |
| download | ipxe-9776f6ece1104cc32de3249844a8a7387112f32f.tar.gz | |
[acpi] Allow for platforms that provide ACPI tables individually
The ACPI API currently expects platforms to provide access to a single
contiguous ACPI table. Some platforms (e.g. Linux userspace) do not
provide a convenient way to obtain the entire ACPI table, but do
provide access to individual tables.
All iPXE consumers of the ACPI API require access only to individual
tables.
Redefine the internal API to make acpi_find() an API method, with all
existing implementations delegating to the current RSDT-based
implementation.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include/ipxe/acpi.h')
| -rw-r--r-- | src/include/ipxe/acpi.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/include/ipxe/acpi.h b/src/include/ipxe/acpi.h index f979ace45..6d19f05fa 100644 --- a/src/include/ipxe/acpi.h +++ b/src/include/ipxe/acpi.h @@ -355,6 +355,8 @@ struct acpi_model { #define PROVIDE_ACPI_INLINE( _subsys, _api_func ) \ PROVIDE_SINGLE_API_INLINE ( ACPI_PREFIX_ ## _subsys, _api_func ) +extern userptr_t acpi_find_via_rsdt ( uint32_t signature, unsigned int index ); + /* Include all architecture-independent ACPI API headers */ #include <ipxe/null_acpi.h> #include <ipxe/efi/efi_acpi.h> @@ -369,13 +371,21 @@ struct acpi_model { */ userptr_t acpi_find_rsdt ( void ); +/** + * Locate ACPI table + * + * @v signature Requested table signature + * @v index Requested index of table with this signature + * @ret table Table, or UNULL if not found + */ +userptr_t acpi_find ( uint32_t signature, unsigned int index ); + extern struct acpi_descriptor * acpi_describe ( struct interface *interface ); #define acpi_describe_TYPE( object_type ) \ typeof ( struct acpi_descriptor * ( object_type ) ) extern void acpi_fix_checksum ( struct acpi_header *acpi ); -extern userptr_t acpi_find ( uint32_t signature, unsigned int index ); extern int acpi_sx ( uint32_t signature ); extern void acpi_add ( struct acpi_descriptor *desc ); extern void acpi_del ( struct acpi_descriptor *desc ); |