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/ IRIX Base Documentation 2002 November / SGI IRIX Base Documentation 2002 November.iso / usr / share / catman / p_man / catD / devflag.z / devflag
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Text File  |  2002-10-03  |  2.4 KB  |  66 lines
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  4. ddddeeeevvvvffffllllaaaagggg((((DDDD1111))))                                                        ddddeeeevvvvffffllllaaaagggg((((DDDD1111))))
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  8. NNNNAAAAMMMMEEEE
  9.      _dddd_eeee_vvvv_ffff_llll_aaaa_gggg - driver flags
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  11. SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
  12.      _####_iiii_nnnn_cccc_llll_uuuu_dddd_eeee _<<<<_ssss_yyyy_ssss_////_cccc_oooo_nnnn_ffff_...._hhhh_>>>>
  13.      _####_iiii_nnnn_cccc_llll_uuuu_dddd_eeee _<<<<_ssss_yyyy_ssss_////_dddd_dddd_iiii_...._hhhh_>>>>
  14.      _iiii_nnnn_tttt _p_r_e_f_i_x_dddd_eeee_vvvv_ffff_llll_aaaa_gggg _==== _0000_;;;;
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  16. DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
  17.      Every driver must define a global integer variable called _p_r_e_f_i_x_dddd_eeee_vvvv_ffff_llll_aaaa_gggg.
  18.      This variable contains a bitmask of flags used to specify the driver's
  19.      characteristics to the system.
  20.  
  21.      The valid flags that may be set in _p_r_e_f_i_x_dddd_eeee_vvvv_ffff_llll_aaaa_gggg are:
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  23.           _DDDD______MMMM_PPPP                The driver is multithreaded (it handles its own
  24.                               locking and serialization).
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  26.           _DDDD______WWWW_BBBB_AAAA_CCCC_KKKK             Writes back cache before strategy routine.
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  28.           _DDDD______OOOO_LLLL_DDDD               The driver uses the old-style interface (pre-5.0
  29.                               release).
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  31.      If no flags are set for the driver, then _p_r_e_f_i_x_dddd_eeee_vvvv_ffff_llll_aaaa_gggg should be set to
  32.      0. If this is not done, then _llll_bbbb_oooo_oooo_tttt will assume that this is an old style
  33.      drive, and it will set _DDDD______OOOO_LLLL_DDDD flag as a default.
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  35. RRRREEEEFFFFEEEERRRREEEENNNNCCCCEEEESSSS
  36.      _pppp_hhhh_yyyy_ssss_iiii_oooo_cccc_kkkk(D3)
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  62.                                                                         PPPPaaaaggggeeee 1111
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