pio_mapalloc(D3X)pio_mapalloc(D3X)NAMEpio_mapalloc - allocate a PIO map
SYNOPSIS
#include <sys/types.h>
#include <sys/ddi.h>
#include <sys/pio.h>
piomap_t *
pio_mapalloc(uint bus, uint adap, iospace_t *iospace, int flag, char *name);
Arguments
bus The type of I/O bus the map is for. Valid I/O bus types are
ADAP_VME,ADAP_GFX,ADAP_SCSI,ADAP_LOCAL,ADAP_GIO,ADAP_EISA,ADAP_IBUS,
ADAP_EPC,ADAP_DANG,ADAP_PCI.
adap Identifies the particular I/O bus.
iospace
This defines the space on the I/O bus to be mapped. Valid spaces for
each bus are as follows.
VME PIOMAP_A16N,PIOMAP_A16S,PIOMAP_A24N,PIOMAP_A24S,PIOMAP_A32N,
PIOMAP_A32S,PIOMAP_A64
EISA PIOMAP_EISA_IO, PIOMAP_EISA_MEM
PCI PIOMAP_PCI_IO,PIOMAP_PCI_MEM,PIOMAP_PCI_CFG,PIOMAP_PCI_ID
IBUS PIOMAP_FCI
GIO PIOMAP_GIO32, PIOMAP_GIO64
flag PIOMAP_FIXED or PIOMAP_UNFIXED.
name A character string used to identify the map. Useful for debugging a
driver.
DESCRIPTIONpio_mapalloc creates PIO maps used to access the I/O bus space from a
driver. PIO maps can be FIXED or UNFIXED. FIXED maps provide the driver
with a kernel address which can be used as a normal pointer to access the
bus space. UNFIXED maps require the use of special routines access to the
bus space.
Return Values
A pointer to a piomap_t type structure which is used with the reset of
the routines.
See Also
pio_mapfree(D3X), pio_mapaddr(D3X), pio_badaddr(D3X), pio_wbadaddr(D3X),
pio_bcopyin(D3X), pio_bcopyout(D3X)
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