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Line 212:
Line 212: − This stores the ''System Mode'', ''Affinity Mask'' and ''Ideal Processor'' values in one byte. They are stored as follows:+ − u8 Flag0 = (SystemMode << 4 | AffinityMask << 2 | IdealProcessor);+ − And can be retrieved as follows:+ − u8 SystemMode = (Flag0>>4)&0xF;+ − u8 AffinityMask = (Flag0>>2)&0x3;+ − u8 IdealProcessor = (Flag0>>0)&0x3;+ + + + + + + + + Line 226:
Line 234: − +
the wiki is not a C primer
==== Flag0 ====
==== Flag0 ====
{| class="wikitable" border="1"
|-
! Bits
! Description
|-
| 0-1
| Ideal Processor
|-
| 2-3
| Affinity Mask
|-
| 4-7
| System Mode
|}
In the exheader data, the IdealProcessor field is a bit-index, while in the accessdesc the IdealProcessor field is a bitmask. When the bit specified by the exheader field is not set in the accessdesc field, an error is returned. "if((1<<exheaderval) & accessdescval == 0)return error"
In the exheader data, the IdealProcessor field is a bit-index, while in the accessdesc the IdealProcessor field is a bitmask. When the bit specified by the exheader field is not set in the accessdesc field, an error is returned. "if((1<<exheaderval) & accessdescval == 0)return error"
{| class="wikitable" border="1"
{| class="wikitable" border="1"
|-
|-
! Bit
! Bits
! Description
! Description
|-
|-