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| author | se <se@FreeBSD.org> | 1995-02-09 20:20:33 +0000 |
|---|---|---|
| committer | se <se@FreeBSD.org> | 1995-02-09 20:20:33 +0000 |
| commit | 93f26e434abdf6c41008b87288c038fa1ada912f (patch) | |
| tree | d42bb73ba47f3412bab161063ad65237c06a7974 /sys/pci/pci.c | |
| parent | cf143514eee5ff97ca1bcf31b5a289c48a66e625 (diff) | |
| download | FreeBSD-src-93f26e434abdf6c41008b87288c038fa1ada912f.zip FreeBSD-src-93f26e434abdf6c41008b87288c038fa1ada912f.tar.gz | |
Try to detect overlapping PCI memory assignment.
(This can only happen with devices that are mapped
by the BIOS.)
Reviewed by: se
Submitted by: wolf (Wolfgang Stanglmeier)
Diffstat (limited to 'sys/pci/pci.c')
| -rw-r--r-- | sys/pci/pci.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/sys/pci/pci.c b/sys/pci/pci.c index 61e546f..5696c9f 100644 --- a/sys/pci/pci.c +++ b/sys/pci/pci.c @@ -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 @@ -575,6 +576,21 @@ int pci_map_mem (pcici_t tag, u_long reg, vm_offset_t* va, vm_offset_t* pa) #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 */ |
