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

1.1       root        1: ggeettPPhhyyssMMeemm() -- Memory-Manipulation Routine
                      2: 
                      3: cchhaarr *
                      4: ggeettPPhhyyssMMeemm(_n_u_m_B_y_t_e_s)
                      5: iinntt _n_u_m_B_y_t_e_s;
                      6: 
                      7: When the  kernel starts  up, it reserves  a block of  physically contiguous
                      8: memory  (of size  PPHHYYSS_MMEEMM) for  one or  more device  drivers to  use.  Any
                      9: device  driver  can  request some  of  this  memory;  to  do so,  it  calls
                     10: ggeettPPhhyyssMMeemm()  from within  its  load routine.   _n_u_m_B_y_t_e_s  gives the  number
                     11: number of bytes it needs.
                     12: 
                     13: If it can meet the request, ggeettPPhhyyssMMeemm() returns the virtual address of the
                     14: start  of  the  region  allocated.   This  region  has  contiguous  virtual
                     15: addresses  within  kernel  data  space,  as  well  as  contiguous  physical
                     16: addresses.  If  it cannot grant  the request, ggeettPPhhyyssMMeemm()  returns 0.  Use
                     17: routine vvttoopp() to determine the physical address of the region.
                     18: 
                     19: _S_e_e _A_l_s_o
                     20: mmeemmoorryy-mmaanniippuullaattiioonn rroouuttiinneess, vvttoopp()

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