memory_cs(4)
NAME
memory_cb - CardBus memory driver
SYNOPSIS
insmod memory_cb.o [pc_debug=n]
DESCRIPTION
Memory_cb gives direct memory access to the address spaces
of CardBus cards. It provides character-mode devices for
accessing a card's PCI configuration space, up to six
mapped memory or IO regions, and its expansion ROM space.
When loaded, memory_cb will allocate a free major device
number. For each card, it will report which address
spaces are available, and their sizes. Minor numbers have
the form 'dddddsss', where 'ddddd' is the instance number
and 'sss' is the memory space for that instance. When
memory_cb is bound to a card, it will report its major and
minor device numbers to cardmgr(8).
The default memory card initialization script creates
device special files for all eight card address spaces,
though for a particular card, some of these may be
unavailable. These devices have the following names:
- /dev/cbmem#s0
- The card's PCI configuration space.
- /dev/cbmem#s[1-6]
- The IO or memory spaces mapped by the card's six
Base Address Registers. - /dev/cbmem#s7
- The card's expansion ROM space.
- The character special devices can be used to read and
write arbitrary numbers of bytes to arbitrary locations.
The memory_cb driver can be bound to any card regardless of function.
PARAMETERS
- pc_debug=n
- Selects the PCMCIA debugging level. This parameter
is only available if the module is compiled with
debugging enabled. A non-zero value enables debug
ging.
AUTHOR
David Hinds - dahinds@users.sourceforge.net