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[acpi] Generalise DSDT/SSDT data extraction logic

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Allow for the DSDT/SSDT signature-scanning and value extraction code
to be reused for extracting a pass-through MAC address.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2021-09-08 12:53:12 +01:00
parent e09e1142a3
commit 02ec659b73
3 changed files with 98 additions and 68 deletions
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4
src/include/ipxe/acpi.h
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@@ -387,7 +387,9 @@ acpi_describe ( struct interface *interface );
typeof ( struct acpi_descriptor * ( object_type ) )
extern void acpi_fix_checksum ( struct acpi_header *acpi );
extern int acpi_sx ( uint32_t signature );
extern int acpi_extract ( uint32_t signature, void *data,
int ( * extract ) ( userptr_t zsdt, size_t len,
size_t offset, void *data ) );
extern void acpi_add ( struct acpi_descriptor *desc );
extern void acpi_del ( struct acpi_descriptor *desc );
extern int acpi_install ( int ( * install ) ( struct acpi_header *acpi ) );