The Juno PIO mapping is 8M, so it should be using 32-bit PIO address translation. Futher, PIO addresses should start at 0 and be translated to/from the ARM MMIO region.
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jeremy Linton jeremy.linton@arm.com --- .../ArmJunoPkg/Drivers/PciHostBridgeDxe/XPressRich3.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/ArmPlatformPkg/ArmJunoPkg/Drivers/PciHostBridgeDxe/XPressRich3.c b/ArmPlatformPkg/ArmJunoPkg/Drivers/PciHostBridgeDxe/XPressRich3.c index 06de6d5..1774e7d 100644 --- a/ArmPlatformPkg/ArmJunoPkg/Drivers/PciHostBridgeDxe/XPressRich3.c +++ b/ArmPlatformPkg/ArmJunoPkg/Drivers/PciHostBridgeDxe/XPressRich3.c @@ -72,7 +72,9 @@ HWPciRbInit (
PCI_TRACE ("PCIe Setting up Address Translation");
- PCIE_ROOTPORT_WRITE32 (PCIE_BAR_WIN, PCIE_BAR_WIN_SUPPORT_IO | PCIE_BAR_WIN_SUPPORT_MEM | PCIE_BAR_WIN_SUPPORT_MEM64); + // The Juno PIO window is 8M, so we need full 32-bit PIO decoding. + PCIE_ROOTPORT_WRITE32 (PCIE_BAR_WIN, PCIE_BAR_WIN_SUPPORT_IO | PCIE_BAR_WIN_SUPPORT_IO32 | + PCIE_BAR_WIN_SUPPORT_MEM | PCIE_BAR_WIN_SUPPORT_MEM64);
// Setup the PCI Configuration Registers // Offset 0a: SubClass 04 PCI-PCI Bridge @@ -82,7 +84,7 @@ HWPciRbInit ( PCIE_ROOTPORT_WRITE32 (PCIE_PCI_IDS + PCIE_PCI_IDS_CLASSCODE_OFFSET, ((PLDA_BRIDGE_CCR << 8) | PCI_BRIDGE_REVISION_ID));
// - // PCIE Window 0 -> AXI4 Slave 0 Address Translations + // PCIE Window 0 -> AXI4 Master 0 Address Translations // TranslationTable = VEXPRESS_ATR_PCIE_WIN0;
@@ -107,9 +109,9 @@ HWPciRbInit ( SetTranslationAddressEntry (CpuIo, TranslationTable, PCI_ECAM_BASE, PCI_ECAM_BASE, PCI_ECAM_SIZE, PCI_ATR_TRSLID_PCIE_CONF); TranslationTable += PCI_ATR_ENTRY_SIZE;
- // PCI IO Support - SetTranslationAddressEntry (CpuIo, TranslationTable, PCI_IO_BASE, PCI_IO_BASE, PCI_IO_SIZE, PCI_ATR_TRSLID_PCIE_IO); + // PCI IO Support, the PIO space is translated from the ARM MMIO PCI_IO_BASE address to the PIO base address of 0 + // AKA, PIO addresses used by endpoints are generally in the range of 0-64K. + SetTranslationAddressEntry (CpuIo, TranslationTable, PCI_IO_BASE, 0, PCI_IO_SIZE, PCI_ATR_TRSLID_PCIE_IO); TranslationTable += PCI_ATR_ENTRY_SIZE;
// PCI MEM32 Support