57 lines
1.2 KiB
C
57 lines
1.2 KiB
C
/**
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* =========================================================================
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* File : acpi.h
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* Project : 0 A.D.
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* Description : minimal subset of ACPI
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* =========================================================================
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*/
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// license: GPL; see lib/license.txt
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#ifndef INCLUDED_ACPI
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#define INCLUDED_ACPI
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#pragma pack(push, 1)
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// common header for all ACPI tables
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struct AcpiTable
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{
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char signature[4];
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u32 size; // table size [bytes], including header
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u8 revision;
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u8 checksum; // to make sum of entire table == 0
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char oemId[6];
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char oemTableId[8];
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u32 oemRevision;
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char creatorId[4];
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u32 creatorRevision;
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};
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enum AcpiAddressSpace
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{
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// (these are not generally powers-of-two - some values have been omitted.)
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ACPI_AS_MEMORY = 0,
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ACPI_AS_IO = 1,
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ACPI_AS_PCI_CONFIG = 2,
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ACPI_AS_SMBUS = 4,
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};
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// address of a struct or register
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struct AcpiGenericAddress
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{
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u8 addressSpaceId;
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u8 registerBitWidth;
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u8 registerBitOffset;
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u8 accessSize;
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u64 address;
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};
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#pragma pack(pop)
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extern bool acpiInit();
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extern void acpiShutdown();
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extern const AcpiTable* acpiGetTable(const char* signature);
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#endif // #ifndef INCLUDED_ACPI
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