Return to dmaon CVS log

Up to [MW Coherent from dump] / coherent / f / usr / man / KERNEL

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

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.