From: Alexander Gordeev <agordeev@xxxxxxxxxx>
Cc: Thomas Huth <thuth@xxxxxxxxxx>
Cc: Andrew Jones <drjones@xxxxxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Reviewed-by: Andrew Jones <drjones@xxxxxxxxxx>
Signed-off-by: Alexander Gordeev <agordeev@xxxxxxxxxx>
---
lib/pci.c | 6 ++++++
lib/pci.h | 1 +
2 files changed, 7 insertions(+)
diff --git a/lib/pci.c b/lib/pci.c
index 74936f3..42f47d9 100644
--- a/lib/pci.c
+++ b/lib/pci.c
@@ -7,6 +7,12 @@
#include "pci.h"
#include "asm/pci.h"
+bool pci_dev_exists(pcidevaddr_t dev)
+{
+ return (pci_config_readw(dev, PCI_VENDOR_ID) != 0xffff &&
+ pci_config_readw(dev, PCI_DEVICE_ID) != 0xffff);
+}
+
/* Scan bus look for a specific device. Only bus 0 scanned for now. */
pcidevaddr_t pci_find_dev(uint16_t vendor_id, uint16_t device_id)
{
diff --git a/lib/pci.h b/lib/pci.h
index 1c20308..1462aa2 100644
--- a/lib/pci.h
+++ b/lib/pci.h
@@ -15,6 +15,7 @@ enum {
PCIDEVADDR_INVALID = 0xffff,
};
+extern bool pci_dev_exists(pcidevaddr_t dev);
extern pcidevaddr_t pci_find_dev(uint16_t vendor_id, uint16_t device_id);
/*
--
2.7.4
--
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