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vba_unmap_csr(9r)
NAME
  vba_unmap_csr - VMEbus: Unmaps a VMEbus address CSR area

SYNOPSIS
  void vba_unmap_csr(
	  struct controller *ctlr,
	  io_handle_t csr_addr_handle );

ARGUMENTS
  ctlr
      Specifies a pointer to the VMEbus device's controller data structure.

  csr_addr_handle
      Specifies the I/O handle that identifies the CSR area mapped in a
      previous call to vba_map_csr(). Because you can multiply map VMEbus
      addresses, the specification of the VMEbus address and the atype is
      ambiguous. The context associated with each allocated I/O handle
      includes the atype and length of the allocation. The vba_map_csr()
      routine saves this context and vba_unmap_csr() deletes this context.

DESCRIPTION
  The vba_unmap_csr() routine unmaps the VMEbus address specified in the
  csr_addr_handle argument. This frees up the resources (for example, one or
  more outbound mapping registers) that were mapped in a previous call to
  vba_map_csr().

RETURN VALUES
  None

EXAMPLE
  The following code fragment shows how vba_unmap_csr() releases resources
  obtained in a previous call to vba_map_csr():

       .
       .
       .

       vba_unmap_csr(ctlr, (io_handle_t)ctlr->addr);

       .
       .
       .






SEE ALSO
  Kernel Routines: vba_map_csr(9r)

Index for Section 9

Alphabetical listing for V

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