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/ IRIX Base Documentation 2002 November / SGI IRIX Base Documentation 2002 November.iso / usr / share / catman / p_man / catD / kvtophys.z / kvtophys
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Text File  |  2002-10-03  |  2.4 KB  |  67 lines
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  4. kkkkvvvvttttoooopppphhhhyyyyssss((((DDDD3333XXXX))))                                                    kkkkvvvvttttoooopppphhhhyyyyssss((((DDDD3333XXXX))))
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  8. NNNNAAAAMMMMEEEE
  9.      _kkkk_vvvv_tttt_oooo_pppp_hhhh_yyyy_ssss - get physical address of buffer data
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  11. SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
  12.      _####_iiii_nnnn_cccc_llll_uuuu_dddd_eeee _<<<<_ssss_yyyy_ssss_////_tttt_yyyy_pppp_eeee_ssss_...._hhhh_>>>>
  13.      _####_iiii_nnnn_cccc_llll_uuuu_dddd_eeee _<<<<_ssss_yyyy_ssss_////_dddd_dddd_iiii_...._hhhh_>>>>
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  15.      _pppp_aaaa_dddd_dddd_rrrr______tttt _kkkk_vvvv_tttt_oooo_pppp_hhhh_yyyy_ssss_((((_vvvv_oooo_iiii_dddd _****_k_v_))))_;;;;
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  17.    AAAArrrrgggguuuummmmeeeennnnttttssss
  18.      _k_v   Pointer to kernel virtual address.
  19.  
  20. DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
  21.      This function returns the physical address equivalent of the specified
  22.      kernel virtual address. Mappings returned are only valid up to a page
  23.      boundary.
  24.  
  25.    RRRReeeettttuuuurrrrnnnn VVVVaaaalllluuuueeeessss
  26.      _kkkk_vvvv_tttt_oooo_pppp_hhhh_yyyy_ssss returns _N_U_L_L if _k_v is invalid; otherwise, a physical address is
  27.      returned.
  28.  
  29.    CCCCaaaauuuuttttiiiioooonnnn
  30.      If _k_v is invalid, referencing the value returned by _kkkk_vvvv_tttt_oooo_pppp_hhhh_yyyy_ssss could panic
  31.      the system.
  32.  
  33.    LLLLeeeevvvveeeellll
  34.      Base or Interrupt.
  35.  
  36.    NNNNooootttteeeessss
  37.      Does not sleep.
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  39.      Driver defined basic locks, read/write locks, and sleep locks may be held
  40.      across calls to this function.
  41.  
  42.    SSSSeeeeeeee AAAAllllssssoooo
  43.      _gggg_eeee_tttt_pppp_aaaa_gggg_eeee_ssss_iiii_zzzz_eeee(2)
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  63.                                                                         PPPPaaaaggggeeee 1111
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