From 0503ff5d7c1630d19ca494621b4fd34a53ddc41e Mon Sep 17 00:00:00 2001
From: Anton Kling <anton@kling.gg>
Date: Wed, 25 Oct 2023 22:40:26 +0200
Subject: Kernel: Add basic support for PCI and rtl8139

This implementation is very messy and is currently not used.
---
 drivers/pci.c | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'drivers/pci.c')

diff --git a/drivers/pci.c b/drivers/pci.c
index cc8a42c..5fe14bd 100644
--- a/drivers/pci.c
+++ b/drivers/pci.c
@@ -1,3 +1,4 @@
+#include <assert.h>
 #include <cpu/io.h>
 #include <drivers/pci.h>
 #include <stdio.h>
@@ -54,8 +55,15 @@ int pci_populate_device_struct(uint16_t vendor, uint16_t device,
         continue;
       pci_device->bus = bus;
       pci_device->slot = slot;
+      uint32_t bar0 = pci_config_read32(pci_device, 0, 0x10);
+      assert(bar0 & 0x1 && "Only support memory IO");
+      pci_device->gen.base_mem_io = bar0 & (~0x3);
       return 1;
     }
   }
   return 0;
 }
+
+uint8_t pci_get_interrupt_line(const struct PCI_DEVICE *device) {
+  return pci_config_read32(device, 0, 0x3C) & 0xFF;
+}
-- 
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