From 139d593640cf8e7cc666818a29a689d5def541ef Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Tue, 7 May 2024 19:15:26 -0400
Subject: kernel: pci: Add macros for fetching BAR base

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/include/dev/pci/pci.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/sys/include/dev/pci/pci.h b/sys/include/dev/pci/pci.h
index 66ecb91..ad3f7ac 100644
--- a/sys/include/dev/pci/pci.h
+++ b/sys/include/dev/pci/pci.h
@@ -34,6 +34,7 @@
 #include <sys/queue.h>
 #include <sys/cdefs.h>
 #include <dev/pci/pciregs.h>
+#include <vm/vm.h>
 
 /* Lookup bits */
 #define PCI_DEVICE_ID   __BIT(0)
@@ -41,6 +42,14 @@
 #define PCI_CLASS       __BIT(2)
 #define PCI_SUBCLASS    __BIT(3)
 
+/* Base address masks for BARs */
+#define PCI_BAR_MEMMASK ~7
+#define PCI_BAR_IOMASK  ~3
+
+/* Macros to fetch base address from BAR */
+#define PCI_BAR_MEMBASE(BAR) PHYS_TO_VIRT(BAR & PCI_BAR_MEMMASK)
+#define PCI_BAR_IOBASE(BAR)  PHYS_TO_VIRT(BAR & PCI_BAR_IOMASK)
+
 /* For PCI lookups */
 struct pci_lookup {
     uint16_t device_id;
-- 
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