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[pci][fdt] do not attempt to configure PCI with 64bit bars on a 32bit system

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Especially in the case where the 32bit system doesn't have an MMU, avoid
using any high addresses for BARs.
This commit is contained in:
Travis Geiselbrecht
2024-05-09 22:15:27 -07:00
parent 5d8dd9c36a
commit 2f98fbf772
2 changed files with 5 additions and 2 deletions
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1
dev/bus/pci/bus_mgr/resource.cpp
View File

@@ -71,6 +71,7 @@ status_t resource_allocator::allocate_mmio(bool can_be_64bit, bool prefetchable,
return NO_ERROR;
}
// after trying once to allocate in a 64bit range, drop to 32bit and try again
if (can_be_64bit) {
can_be_64bit = false;
continue;

6
lib/fdtwalk/helpers.cpp
View File

@@ -249,8 +249,10 @@ status_t fdtwalk_setup_pci(const void *fdt) {
if (pcie_info[i].mmio_len > 0) {
pci_bus_mgr_add_resource(PCI_RESOURCE_MMIO_RANGE, pcie_info[i].mmio_base, pcie_info[i].mmio_len);
}
if (pcie_info[i].mmio64_len > 0) {
pci_bus_mgr_add_resource(PCI_RESOURCE_MMIO64_RANGE, pcie_info[i].mmio64_base, pcie_info[i].mmio64_len);
if (sizeof(void *) >= 8) {
if (pcie_info[i].mmio64_len > 0) {
pci_bus_mgr_add_resource(PCI_RESOURCE_MMIO64_RANGE, pcie_info[i].mmio64_base, pcie_info[i].mmio64_len);
}
}
}
}