pci: learn to code

Author: KieranMusser

src/kernel/pci.c

@@ -12,23 +12,20 @@ void pci_enumerate() {
   uaddr lo, hi;
   struct vma *vma;
 
-  /* lol */
-  uaddr base = 0;
-  for (u64 i=0; i<32; ++i) {
-    vma = vma_alloc(&kernel_virtual_allocator, 1);
-    assert(vma);
+  vma = vma_alloc(&kernel_virtual_allocator, 32);
+  assert(vma);
 
-    vma_bounds(vma, &lo, &hi);
-    mm_paging_map(lo, paddr_of_bits(pci_config + i * 0x1000), PGPERM_KRW);
+  vma_bounds(vma, &lo, &hi);
 
-    if (base == 0) base = lo;
+  for (u64 i=0; i<32; ++i) {
+    mm_paging_map(lo + i * 0x1000, paddr_of_bits(pci_config + i * 0x1000), PGPERM_KRW);
   }
   for (u64 dev=0; dev<32; ++dev) {
     u64 bus = 0;
     u64 func = 0;
     u64 offset = 0;
     offset = (bus << 16) | (dev << 11) | (func << 8) | (offset);
-    struct pci_device *device = (struct pci_device *)(base + offset);
+    struct pci_device *device = (struct pci_device *)(lo + offset);
 
     u16 did = device->did;
     u16 vid = device->vid;