PCI XHCI disable page chaching for mmio

2026-03-25 23:18:20 +01:00
parent b3eb2d9efe
commit 99712af7dd
1 changed files with 1 additions and 2 deletions
--- a/kernel/device/pci_xhci.c
+++ b/kernel/device/pci_xhci.c
@@ -61,10 +61,9 @@ bool pci_xhci_init (struct proc* proc, struct reschedule_ctx* rctx, struct pci_i

  uintptr_t xhci_base = xhci_phys + (uintptr_t)hhdm->offset;

-  /* 2 pages should cover the mmio space */
  for (size_t page = 0; page < 8; page++) {
    mm_map_kernel_page (xhci_phys + page * PAGE_SIZE, xhci_base + page * PAGE_SIZE,
-                        MM_PG_RW | MM_PG_PRESENT);
+                        MM_PG_RW | MM_PG_PRESENT | MM_PG_NOCACHE);
  }

  bool irqs_support = false;