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Annotation of coherent/f/usr/man/KERNEL/dmaon, revision 1.1.1.1

1.1       root        1: ddmmaaoonn() -- Accessible Kernel Routine
                      2: 
                      3: #iinncclluuddee <ssyyss/ttyyppeess.hh>
                      4: iinntt
                      5: ddmmaaoonn(_c_h_a_n, _p_a_d_d_r, _c_o_u_n_t, _w_f_l_a_g)
                      6: iinntt _c_h_a_n;
                      7: ppaaddddrr_tt _p_a_d_d_r;
                      8: uunnssiiggnneedd _c_o_u_n_t;
                      9: iinntt _w_f_l_a_g;
                     10: 
                     11: ddmmaaoonn()  programs DMA  channel  _c_h_a_n to  transfer  _c_o_u_n_t bytes  to or  from
                     12: physical-memory address  _p_a_d_d_r.  If _w_f_l_a_g  is zero, the data  are read from
                     13: the device and written to memory.
                     14: 
                     15: If the  operation is successfully  programmed, ddmmaaoonn() returns  one.  A DMA
                     16: straddle arises when an operation would cross a 64-kilobyte physical memory
                     17: boundary.  As  the DMA controller  cannot handle a  straddle condition, the
                     18: operation is not programmed and ddmmaaoonn() returns zero.
                     19: 
                     20: _S_e_e _A_l_s_o
                     21: aacccceessssiibbllee kkeerrnneell rroouuttiinneess

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