minix/lib/libsys/pci_get_bar.c
David van Moolenbroek 2488cc6442 PCI: expose BAR sizes
2010-07-01 09:10:16 +00:00

38 lines
718 B
C

/*
pci_get_bar.c
*/
#include "pci.h"
#include "syslib.h"
#include <minix/sysutil.h>
/*===========================================================================*
* pci_get_bar *
*===========================================================================*/
PUBLIC int pci_get_bar(devind, port, base, size, ioflag)
int devind;
int port;
u32_t *base;
u32_t *size;
int *ioflag;
{
int r;
message m;
m.m_type= BUSC_PCI_GET_BAR;
m.BUSC_PGB_DEVIND= devind;
m.BUSC_PGB_PORT= port;
r= sendrec(pci_procnr, &m);
if (r != 0)
panic("pci_get_bar: can't talk to PCI: %d", r);
if (m.m_type == 0)
{
*base= m.BUSC_PGB_BASE;
*size= m.BUSC_PGB_SIZE;
*ioflag= m.BUSC_PGB_IOFLAG;
}
return m.m_type;
}