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Try to detect overlapping PCI memory assignment.

Browse Source 
(This can only happen with devices that are mapped
by the BIOS.)

Reviewed by:	se
Submitted by:	wolf (Wolfgang Stanglmeier)
This commit is contained in:
se 1995-02-09 20:20:33 +00:00
parent cf143514ee
commit 93f26e434a
2 changed files with 34 additions and 2 deletions
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18
sys/dev/pci/pci.c
View File

@ -1,6 +1,6 @@
/**************************************************************************
**
** $Id: pci.c,v 1.10 1995/02/02 12:36:18 davidg Exp $
** $Id: pci.c,v 1.9 1994/11/02 23:47:13 se Exp $
**
** General subroutines for the PCI bus on 80*86 systems.
** pci_configure ()
@ -511,6 +511,7 @@ int pci_map_mem (pcici_t tag, u_long reg, vm_offset_t* va, vm_offset_t* pa)
u_long data;
vm_size_t vsize;
vm_offset_t vaddr;
int i;
/*
** sanity check
@ -574,6 +575,21 @@ int pci_map_mem (pcici_t tag, u_long reg, vm_offset_t* va, vm_offset_t* pa)
(unsigned) reg, (u_long)vaddr, (u_long)pci_paddr);
#endif
/*
** probe for already mapped device.
*/
for (i=0; i<vsize; i+=4) {
u_long* addr = (u_long*) (vaddr+i);
data = *addr;
if (data != 0xffffffff) {
printf ("WARNING: possible address conflict "
"at 0x%08x (read: 0x%08x).\n",
(unsigned) pci_paddr+i, (unsigned) data);
break;
};
};
/*
** return them to the driver
*/

18
sys/pci/pci.c
View File

@ -1,6 +1,6 @@
/**************************************************************************
**
** $Id: pci.c,v 1.10 1995/02/02 12:36:18 davidg Exp $
** $Id: pci.c,v 1.9 1994/11/02 23:47:13 se Exp $
**
** General subroutines for the PCI bus on 80*86 systems.
** pci_configure ()
@ -511,6 +511,7 @@ int pci_map_mem (pcici_t tag, u_long reg, vm_offset_t* va, vm_offset_t* pa)
u_long data;
vm_size_t vsize;
vm_offset_t vaddr;
int i;
/*
** sanity check
@ -574,6 +575,21 @@ int pci_map_mem (pcici_t tag, u_long reg, vm_offset_t* va, vm_offset_t* pa)
(unsigned) reg, (u_long)vaddr, (u_long)pci_paddr);
#endif
/*
** probe for already mapped device.
*/
for (i=0; i<vsize; i+=4) {
u_long* addr = (u_long*) (vaddr+i);
data = *addr;
if (data != 0xffffffff) {
printf ("WARNING: possible address conflict "
"at 0x%08x (read: 0x%08x).\n",
(unsigned) pci_paddr+i, (unsigned) data);
break;
};
};
/*
** return them to the driver
*/