iPXE
isa_ids.h
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1 #ifndef ISA_IDS_H
2 #define ISA_IDS_H
3 
4 /*
5  * This file defines IDs as used by ISAPnP and EISA devices. These
6  * IDs have the format:
7  *
8  * vendor byte 0 bit 7 must be zero
9  * bits 6-2 first vendor char in compressed ASCII
10  * bits 1-0 second vendor char in compressed ASCII (bits 4-3)
11  * byte 1 bits 7-5 second vendor char in compressed ASCII (bits 2-0)
12  * bits 4-0 third vendor char in compressed ASCII
13  * product byte 0 bits 7-4 first hex digit of product number
14  * bits 3-0 second hex digit of product number
15  * byte 1 bits 7-4 third hex digit of product number
16  * bits 3-0 hex digit of revision level
17  *
18  * ISA IDs are always expressed in little-endian order, even though
19  * the underlying "meaning" is big-endian.
20  */
21 
22 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
23 
24 #include <byteswap.h>
25 
26 /*
27  * Construct a vendor ID from three ASCII characters
28  *
29  */
30 #define ISA_VENDOR( a, b, c ) \
31  bswap_16 ( ( ( ( (a) - 'A' + 1 ) & 0x1f ) << 10 ) | \
32  ( ( ( (b) - 'A' + 1 ) & 0x1f ) << 5 ) | \
33  ( ( ( (c) - 'A' + 1 ) & 0x1f ) << 0 ) )
34 
35 #define ISAPNP_VENDOR( a, b, c ) ISA_VENDOR ( a, b, c )
36 #define EISA_VENDOR( a, b, c ) ISA_VENDOR ( a, b, c )
37 
38 #define GENERIC_ISAPNP_VENDOR ISAPNP_VENDOR ( 'P','N','P' )
39 
40 /*
41  * Extract product ID and revision from combined product field
42  *
43  */
44 #define ISA_PROD_ID_MASK ( 0xf0ff )
45 #define ISA_PROD_ID(product) ( (product) & ISA_PROD_ID_MASK )
46 #define ISA_PROD_REV(product) ( ( (product) & ~ISA_PROD_ID_MASK ) >> 8 )
47 
48 /* Functions in isa_ids.c */
49 extern char * isa_id_string ( unsigned int vendor, unsigned int product );
50 
51 #endif /* ISA_IDS_H */
char * isa_id_string(unsigned int vendor, unsigned int product)
Definition: isa_ids.c:11
FILE_LICENCE(GPL2_OR_LATER_OR_UBDL)
union bootph_vendor vendor
uint8_t product
Product string.
Definition: smbios.h:16