From: Wasim Khan <wasim.k...@nxp.com>
Setup PCIe LayerscapeGen4 controller and setup CFG, IO,
MMIO and MMIO64 iATU windows.
Check for PcdPciLsGen4Ctrl to enable LsGen4 PCIe
controller.
Co-authored-by: Vabhav Sharma <vabhav.sha...@nxp.com>
Co-authored-by: Wasim Khan <wasim.k...@nxp.com>
Signed-off-by: Wasim Khan <wasim.k...@nxp.com>
---
Notes:
V2:
- Removed Signed-off and added Co-authored-by for co-author
- Added logic to create MMIO64 ATU windows as per MMIO64 available space
Silicon/NXP/NxpQoriqLs.dec | 1 +
Silicon/NXP/Library/PciHostBridgeLib/PciHostBridgeLib.inf | 1 +
Silicon/NXP/Include/Pcie.h | 120 ++++++++++
Silicon/NXP/Library/PciHostBridgeLib/PciHostBridgeLib.c | 247
++++++++++++++++----
4 files changed, 328 insertions(+), 41 deletions(-)
diff --git a/Silicon/NXP/NxpQoriqLs.dec b/Silicon/NXP/NxpQoriqLs.dec
index 5358aaeb037e..d4d3057af509 100644
--- a/Silicon/NXP/NxpQoriqLs.dec
+++ b/Silicon/NXP/NxpQoriqLs.dec
@@ -38,3 +38,4 @@ [PcdsFixedAtBuild.common]
[PcdsDynamic.common]
gNxpQoriqLsTokenSpaceGuid.PcdPciCfgShiftEnable|FALSE|BOOLEAN|0x00000600
+ gNxpQoriqLsTokenSpaceGuid.PcdPciLsGen4Ctrl|FALSE|BOOLEAN|0x00000601
diff --git a/Silicon/NXP/Library/PciHostBridgeLib/PciHostBridgeLib.inf
b/Silicon/NXP/Library/PciHostBridgeLib/PciHostBridgeLib.inf
index 99807d5beb1f..aa5a9dec7c34 100644
--- a/Silicon/NXP/Library/PciHostBridgeLib/PciHostBridgeLib.inf
+++ b/Silicon/NXP/Library/PciHostBridgeLib/PciHostBridgeLib.inf
@@ -40,3 +40,4 @@ [FixedPcd]
[Pcd]
gNxpQoriqLsTokenSpaceGuid.PcdPciCfgShiftEnable
+ gNxpQoriqLsTokenSpaceGuid.PcdPciLsGen4Ctrl
diff --git a/Silicon/NXP/Include/Pcie.h b/Silicon/NXP/Include/Pcie.h
index f7c18c3aa094..b7d46f3a3bd2 100755
--- a/Silicon/NXP/Include/Pcie.h
+++ b/Silicon/NXP/Include/Pcie.h
@@ -81,5 +81,125 @@
#define SEG_IO_BUS 0x0
#define CFG_SHIFT_ENABLE (PcdGetBool (PcdPciCfgShiftEnable))
+#define PCI_LS_GEN4_CTRL (PcdGetBool (PcdPciLsGen4Ctrl))
+// PCIe Layerscape Gen4 Controller
+#define GPEX_CLASSCODE 0x474
+#define GPEX_CLASSCODE_SHIFT 16
+#define GPEX_CLASSCODE_MASK 0xffff
+#define PAB_AXI_PIO_CTRL(Idx) (0x840 + 0x10 * Idx)
+#define APIO_EN 0x1
+#define MEM_WIN_EN 0x1 << 1
+#define IO_WIN_EN 0x1 << 2
+#define CFG_WIN_EN 0x1 << 3
+#define PAB_PEX_PIO_CTRL(Idx) (0x8c0 + 0x10 * Idx)
+#define PPIO_EN (0x1 << 0)
+#define PAB_PEX_PIO_STAT(Idx) (0x8c4 + 0x10 * Idx)
+#define PAB_PEX_PIO_MT_STAT(Idx) (0x8c8 + 0x10 * Idx)
+#define PEX_AMAP_CTRL_TYPE_SHIFT 0x1
+#define PEX_AMAP_CTRL_EN_SHIFT 0x0
+#define PEX_AMAP_CTRL_TYPE_MASK 0x3
+#define PEX_AMAP_CTRL_EN_MASK 0x1
+#define PAB_PEX_AMAP_CTRL(Idx) (0x4ba0 + 0x10 * Idx)
+#define PAB_EXT_PEX_AMAP_SIZE(Idx) (0xbef0 + 0x04 * Idx)
+#define PAB_PEX_AMAP_AXI_WIN(Idx) (0x4ba4 + 0x10 * Idx)
+#define PAB_EXT_PEX_AMAP_AXI_WIN(Idx) (0xb4a0 + 0x04 * Idx)
+#define PAB_PEX_AMAP_PEX_WIN_L(Idx) (0x4ba8 + 0x10 * Idx)
+#define PAB_PEX_AMAP_PEX_WIN_H(Idx) (0x4bac + 0x10 * Idx)
+#define PAB_CTRL 0x808
+#define PAB_CTRL_APIO_EN 0x1
+#define PAB_CTRL_PPIO_EN (0x1 << 1)
+#define PAB_CTRL_PAGE_SEL_SHIFT 13
+#define PAB_CTRL_PAGE_SEL_MASK 0x3f
+#define INDIRECT_ADDR_BNDRY 0xc00
+#define PAGE_IDX_SHIFT 10
+#define PAGE_ADDR_MASK 0x3ff
+#define PAB_AXI_AMAP_CTRL(Idx) (0xba0 + 0x10 * Idx)
+#define PAB_EXT_AXI_AMAP_SIZE(Idx) (0xbaf0 + 0x4 * Idx)
+#define PAB_AXI_AMAP_AXI_WIN(Idx) (0xba4 + 0x10 * Idx)
+#define PAB_EXT_AXI_AMAP_AXI_WIN(Idx) (0x80a0 + 0x4 * Idx)
+#define PAB_AXI_AMAP_PEX_WIN_L(Idx) (0xba8 + 0x10 * Idx)
+#define PAB_AXI_AMAP_PEX_WIN_H(Idx) (0xbac + 0x10 * Idx)
+#define PAB_AXI_TYPE_CFG 0x00
+#define PAB_AXI_TYPE_IO 0x01
+#define PAB_AXI_TYPE_MEM 0x02
+#define AXI_AMAP_CTRL_EN 0x1
+#define AXI_AMAP_CTRL_TYPE_SHIFT 1
+#define AXI_AMAP_CTRL_TYPE_MASK 0x3
+#define AXI_AMAP_CTRL_SIZE_SHIFT 10
+#define AXI_AMAP_CTRL_SIZE_MASK 0x3fffff
+
+
+#define OFFSET_TO_PAGE_IDX(Off) ((Off >> PAGE_IDX_SHIFT) \
+ & PAB_CTRL_PAGE_SEL_MASK)
+
+#define OFFSET_TO_PAGE_ADDR(Off) ((Off & PAGE_ADDR_MASK) \
+ | INDIRECT_ADDR_BNDRY)
+/**
+ Function to set page for LsGen4 Ctrl
+
+ @param Dbi GPEX host controller address.
+ @param PgIdx The page index to select
+
+**/
+STATIC inline VOID PciLsGen4SetPg (
+ IN EFI_PHYSICAL_ADDRESS Dbi,
+ IN UINT8 PgIdx
+ )
+{
+ UINT32 Val;
+ Val = MmioRead32 (Dbi + PAB_CTRL);
+ Val &= ~(PAB_CTRL_PAGE_SEL_MASK << PAB_CTRL_PAGE_SEL_SHIFT);
+ Val |= (PgIdx & PAB_CTRL_PAGE_SEL_MASK) << PAB_CTRL_PAGE_SEL_SHIFT;
+ MmioWrite32 (Dbi + PAB_CTRL, Val);
+}
+
+/**
+ Function to read LsGen4 PCIe controller config space
+ LsGen4 PCIe controller requires page number to be set
+ in Bridge Control Register(PAB) for offset > 3KB.
+
+ @param Dbi GPEX host controller address.
+ @param Offset Offset to read from
+
+**/
+STATIC inline INTN PciLsGen4Read32 (
+ IN EFI_PHYSICAL_ADDRESS Dbi,
+ IN UINT32 Offset
+ )
+{
+ if (Offset < INDIRECT_ADDR_BNDRY) {
+ PciLsGen4SetPg (Dbi, 0);
+ return MmioRead32 (Dbi + Offset);
+ } else {
+ // If Offset > 3KB, paging mechanism is used
+ // Select page index and offset within the page
+ PciLsGen4SetPg (Dbi, OFFSET_TO_PAGE_IDX (Offset));
+ return MmioRead32 (Dbi + OFFSET_TO_PAGE_ADDR (Offset));
+ }
+}
+
+/**
+ Function to write to LsGen4 PCIe controller config space
+ LsGen4 PCIe controller requires page number to be set
+ in Bridge Control Register(PAB) for offset > 3KB.
+
+ @param Dbi GPEX host controller address
+ @param Offset Offset to read from
+
+**/
+STATIC inline VOID PciLsGen4Write32 (
+ IN EFI_PHYSICAL_ADDRESS Dbi,
+ IN UINT32 Offset,
+ IN UINT32 Value
+ )
+{
+ if (Offset < INDIRECT_ADDR_BNDRY) {
+ PciLsGen4SetPg (Dbi, 0);
+ MmioWrite32 (Dbi + Offset, Value);
+ } else {
+ PciLsGen4SetPg (Dbi, OFFSET_TO_PAGE_IDX (Offset));
+ MmioWrite32 (Dbi + OFFSET_TO_PAGE_ADDR (Offset), Value);
+ }
+}
#endif
diff --git a/Silicon/NXP/Library/PciHostBridgeLib/PciHostBridgeLib.c
b/Silicon/NXP/Library/PciHostBridgeLib/PciHostBridgeLib.c
index 9fae19095cba..8e39fb25f83e 100644
--- a/Silicon/NXP/Library/PciHostBridgeLib/PciHostBridgeLib.c
+++ b/Silicon/NXP/Library/PciHostBridgeLib/PciHostBridgeLib.c
@@ -201,7 +201,11 @@ PcieLinkUp (
UINT32 State;
UINT32 LtssmMask;
- LtssmMask = 0x3f;
+ if (PCI_LS_GEN4_CTRL) {
+ LtssmMask = 0x7f;
+ } else {
+ LtssmMask = 0x3f;
+ }
PcieOps = GetMmioOperations (FeaturePcdGet (PcdPciLutBigEndian));
State = PcieOps->Read32 ((UINTN)Pcie + PCI_LUT_BASE + PCI_LUT_DBG) &
LtssmMask;
@@ -237,38 +241,58 @@ PcieOutboundSet (
IN UINT64 Size
)
{
- // PCIe Layerscape : Outbound Window
- MmioWrite32 (Dbi + IATU_VIEWPORT_OFF,
- (UINT32)(IATU_VIEWPORT_OUTBOUND | Idx));
+ UINT32 Val;
- MmioWrite32 (Dbi + IATU_LWR_BASE_ADDR_OFF_OUTBOUND_0,
- (UINT32)Phys);
-
- MmioWrite32 (Dbi + IATU_UPPER_BASE_ADDR_OFF_OUTBOUND_0,
- (UINT32)(Phys >> 32));
-
- MmioWrite32 (Dbi + IATU_LIMIT_ADDR_OFF_OUTBOUND_0,
- (UINT32)(Phys + Size - BIT0));
-
- MmioWrite32 (Dbi + IATU_LWR_TARGET_ADDR_OFF_OUTBOUND_0,
- (UINT32)BusAddr);
-
- MmioWrite32 (Dbi + IATU_UPPER_TARGET_ADDR_OFF_OUTBOUND_0,
- (UINT32)(BusAddr >> 32));
-
- MmioWrite32 (Dbi + IATU_REGION_CTRL_1_OFF_OUTBOUND_0,
- (UINT32)Type);
-
- if (CFG_SHIFT_ENABLE &&
- ((Type == IATU_REGION_CTRL_1_OFF_OUTBOUND_0_TYPE_CFG0) ||
- (Type == IATU_REGION_CTRL_1_OFF_OUTBOUND_0_TYPE_CFG1))) {
- MmioWrite32 (Dbi + IATU_REGION_CTRL_2_OFF_OUTBOUND_0,
- (IATU_REGION_CTRL_2_OFF_OUTBOUND_0_REGION_EN |
- IATU_ENABLE_CFG_SHIFT_FEATURE)
- );
+ if (PCI_LS_GEN4_CTRL) {
+ // PCIe Layerscape Gen4: Outbound Window
+ Size = ~(Size -1 );
+ Val = PciLsGen4Read32 ((UINTN)Dbi, PAB_AXI_AMAP_CTRL (Idx));
+ Val &= ~((AXI_AMAP_CTRL_TYPE_MASK << AXI_AMAP_CTRL_TYPE_SHIFT) |
+ (AXI_AMAP_CTRL_SIZE_MASK << AXI_AMAP_CTRL_SIZE_SHIFT) |
+ AXI_AMAP_CTRL_EN);
+ Val |= ((Type & AXI_AMAP_CTRL_TYPE_MASK) << AXI_AMAP_CTRL_TYPE_SHIFT) |
+ (((UINT32)Size >> AXI_AMAP_CTRL_SIZE_SHIFT) <<
+ AXI_AMAP_CTRL_SIZE_SHIFT) | AXI_AMAP_CTRL_EN;
+ PciLsGen4Write32 ((UINTN)Dbi, PAB_AXI_AMAP_CTRL (Idx), Val);
+ PciLsGen4Write32 ((UINTN)Dbi, PAB_AXI_AMAP_AXI_WIN (Idx), (UINT32)Phys);
+ PciLsGen4Write32 ((UINTN)Dbi, PAB_EXT_AXI_AMAP_AXI_WIN (Idx), Phys >> 32);
+ PciLsGen4Write32 ((UINTN)Dbi, PAB_AXI_AMAP_PEX_WIN_L (Idx),
(UINT32)BusAddr);
+ PciLsGen4Write32 ((UINTN)Dbi, PAB_AXI_AMAP_PEX_WIN_H (Idx), BusAddr >> 32);
+ PciLsGen4Write32 ((UINTN)Dbi, PAB_EXT_AXI_AMAP_SIZE (Idx), Size >> 32);
} else {
- MmioWrite32 (Dbi + IATU_REGION_CTRL_2_OFF_OUTBOUND_0,
- IATU_REGION_CTRL_2_OFF_OUTBOUND_0_REGION_EN);
+ // PCIe Layerscape : Outbound Window
+ MmioWrite32 (Dbi + IATU_VIEWPORT_OFF,
+ (UINT32)(IATU_VIEWPORT_OUTBOUND | Idx));
+
+ MmioWrite32 (Dbi + IATU_LWR_BASE_ADDR_OFF_OUTBOUND_0,
+ (UINT32)Phys);
+
+ MmioWrite32 (Dbi + IATU_UPPER_BASE_ADDR_OFF_OUTBOUND_0,
+ (UINT32)(Phys >> 32));
+
+ MmioWrite32 (Dbi + IATU_LIMIT_ADDR_OFF_OUTBOUND_0,
+ (UINT32)(Phys + Size - BIT0));
+
+ MmioWrite32 (Dbi + IATU_LWR_TARGET_ADDR_OFF_OUTBOUND_0,
+ (UINT32)BusAddr);
+
+ MmioWrite32 (Dbi + IATU_UPPER_TARGET_ADDR_OFF_OUTBOUND_0,
+ (UINT32)(BusAddr >> 32));
+
+ MmioWrite32 (Dbi + IATU_REGION_CTRL_1_OFF_OUTBOUND_0,
+ (UINT32)Type);
+
+ if (CFG_SHIFT_ENABLE &&
+ ((Type == IATU_REGION_CTRL_1_OFF_OUTBOUND_0_TYPE_CFG0) ||
+ (Type == IATU_REGION_CTRL_1_OFF_OUTBOUND_0_TYPE_CFG1))) {
+ MmioWrite32 (Dbi + IATU_REGION_CTRL_2_OFF_OUTBOUND_0,
+ (IATU_REGION_CTRL_2_OFF_OUTBOUND_0_REGION_EN |
+ IATU_ENABLE_CFG_SHIFT_FEATURE)
+ );
+ } else {
+ MmioWrite32 (Dbi + IATU_REGION_CTRL_2_OFF_OUTBOUND_0,
+ IATU_REGION_CTRL_2_OFF_OUTBOUND_0_REGION_EN);
+ }
}
}
@@ -373,6 +397,116 @@ PcieLsSetupAtu (
SEG_IO_SIZE
);
}
+
+/**
+ Function to set-up ATU windows for PCIe LayerscapeGen4 controller
+
+ @param Pcie Address of PCIe host controller
+ @param Cfg0Base PCIe controller phy address Type0 Configuration Space.
+ @param Cfg1Base PCIe controller phy address Type1 Configuration Space.
+ @param MemBase PCIe controller phy address Memory Space.
+ @param Mem64Base PCIe controller phy address MMIO64 Space.
+ @param IoBase PCIe controller phy address IO Space.
+**/
+STATIC
+VOID
+PcieLsGen4SetupAtu (
+ IN EFI_PHYSICAL_ADDRESS Pcie,
+ IN EFI_PHYSICAL_ADDRESS Cfg0Base,
+ IN EFI_PHYSICAL_ADDRESS Cfg1Base,
+ IN EFI_PHYSICAL_ADDRESS MemBase,
+ IN EFI_PHYSICAL_ADDRESS Mem64Base,
+ IN EFI_PHYSICAL_ADDRESS IoBase
+ )
+{
+ UINT64 Mem64End;
+ UINT32 Index;
+
+ Index=0;
+
+ // ATU : OUTBOUND WINDOW 1 : CFG0
+ PcieOutboundSet (Pcie, Index++,
+ PAB_AXI_TYPE_CFG,
+ Cfg0Base,
+ SEG_CFG_BUS,
+ SEG_CFG_SIZE);
+
+ // ATU : OUTBOUND WINDOW 2 : IO
+ PcieOutboundSet (Pcie, Index++,
+ PAB_AXI_TYPE_IO,
+ IoBase,
+ SEG_IO_BUS,
+ SEG_IO_SIZE);
+
+ // ATU : OUTBOUND WINDOW 3 : MEM
+ PcieOutboundSet (Pcie, Index++,
+ PAB_AXI_TYPE_MEM,
+ MemBase,
+ SEG_MEM_BUS,
+ SEG_MEM_SIZE);
+
+ //
+ // To allow maximum MMIO64 space, MMIO64 window
+ // size must be multiple of max iATU size (4GB)
+ //
+ ASSERT ((PCI_MMIO64_WIN_SIZE & (SIZE_4GB - 1)) == 0);
+
+ Mem64End = Mem64Base + PCI_MMIO64_WIN_SIZE - 1;
+ while (Mem64Base < Mem64End) {
+ // ATU : OUTBOUND WINDOW : MMIO64
+ PcieOutboundSet (Pcie, Index++,
+ PAB_AXI_TYPE_MEM,
+ Mem64Base,
+ Mem64Base,
+ SIZE_4GB);
+
+ Mem64Base += SIZE_4GB;
+ }
+}
+
+/**
+ Function to set-up PCIe inbound window
+
+ @param Pcie Address of PCIe host controller.
+ @param Idx Index of inbound window.
+ @param Type Type(Cfg/Mem/IO) of iATU outbound window.
+ @param Phys PCIe controller phy address for inbound window.
+ @param BusAdr PCIe controller bus address for inbound window.
+ @param Size Window size
+
+**/
+
+STATIC
+VOID
+PciSetupInBoundWin (
+ IN EFI_PHYSICAL_ADDRESS Pcie,
+ IN UINT32 Idx,
+ IN UINT32 Type,
+ IN UINT64 Phys,
+ IN UINT64 BusAddr,
+ IN UINT64 Size)
+{
+ UINT32 Val;
+ UINT64 WinSize;
+
+ if (PCI_LS_GEN4_CTRL) {
+ Val = PciLsGen4Read32 ((UINTN)Pcie, PAB_PEX_AMAP_CTRL(Idx));
+ Val &= ~(PEX_AMAP_CTRL_TYPE_MASK << PEX_AMAP_CTRL_TYPE_SHIFT);
+ Val &= ~(PEX_AMAP_CTRL_EN_MASK << PEX_AMAP_CTRL_EN_SHIFT);
+ Val = (Val | (Type << PEX_AMAP_CTRL_TYPE_SHIFT));
+ Val = (Val | (1 << PEX_AMAP_CTRL_EN_SHIFT));
+
+ WinSize = ~(Size - 1);
+ PciLsGen4Write32 ((UINTN)Pcie, PAB_PEX_AMAP_CTRL(Idx),
+ (Val | (UINT32)WinSize));
+ PciLsGen4Write32 ((UINTN)Pcie, PAB_EXT_PEX_AMAP_SIZE(Idx), (WinSize>>32));
+ PciLsGen4Write32 ((UINTN)Pcie, PAB_PEX_AMAP_AXI_WIN(Idx), (UINT32)Phys);
+ PciLsGen4Write32 ((UINTN)Pcie, PAB_EXT_PEX_AMAP_AXI_WIN(Idx), (Phys>>32));
+ PciLsGen4Write32 ((UINTN)Pcie, PAB_PEX_AMAP_PEX_WIN_L(Idx),
(UINT32)BusAddr);
+ PciLsGen4Write32 ((UINTN)Pcie, PAB_PEX_AMAP_PEX_WIN_H(Idx), (BusAddr
>>32));
+ }
+}
+
/**
Helper function to set-up PCIe controller
@@ -397,16 +531,47 @@ PcieSetupCntrl (
{
UINT32 Val;
- // PCIe Layerscape Controller Setup
- PcieLsSetupAtu (Pcie, Cfg0Base, Cfg1Base, MemBase, Mem64Base, IoBase);
-
- // Program Class code for Layerscape PCIe controller
- MmioWrite32 ((UINTN)Pcie + PCI_DBI_RO_WR_EN, 1);
- Val = MmioRead32 ((UINTN)Pcie + PCI_CLASS_DEVICE);
- Val &= ~(CLASS_CODE_MASK << CLASS_CODE_SHIFT);
- Val |= (PCI_CLASS_BRIDGE_PCI << CLASS_CODE_SHIFT);
- MmioWrite32 ((UINTN)Pcie + PCI_CLASS_DEVICE, Val);
- MmioWrite32 ((UINTN)Pcie + PCI_DBI_RO_WR_EN, 0);
+ if (PCI_LS_GEN4_CTRL) {
+ // PCIe LsGen4 Controller Setup
+
+ //Fix Class Code
+ Val = PciLsGen4Read32 ((UINTN)Pcie, GPEX_CLASSCODE);
+ Val &= ~(GPEX_CLASSCODE_MASK << GPEX_CLASSCODE_SHIFT);
+ Val |= PCI_CLASS_BRIDGE_PCI << GPEX_CLASSCODE_SHIFT;
+ PciLsGen4Write32 ((UINTN)Pcie, GPEX_CLASSCODE, Val);
+
+ // Enable APIO and Memory/IO/CFG Windows
+ Val = PciLsGen4Read32 ((UINTN)Pcie, PAB_AXI_PIO_CTRL (0));
+ Val |= APIO_EN | MEM_WIN_EN | IO_WIN_EN | CFG_WIN_EN;
+ PciLsGen4Write32 ((UINTN)Pcie, PAB_AXI_PIO_CTRL (0), Val);
+
+ // LsGen4 Inbound Window Setup
+ PciSetupInBoundWin (Pcie, 0, PAB_AXI_TYPE_MEM, 0 , 0, SIZE_1TB);
+
+ // LsGen4 Outbound Window Setup
+ PcieLsGen4SetupAtu (Pcie, Cfg0Base, Cfg1Base, MemBase, Mem64Base, IoBase);
+
+ // Enable AMBA & PEX PIO
+ Val = PciLsGen4Read32 ((UINTN)Pcie, PAB_CTRL);
+ Val |= PAB_CTRL_APIO_EN | PAB_CTRL_PPIO_EN;
+ PciLsGen4Write32 ((UINTN)Pcie, PAB_CTRL, Val);
+
+ Val = PciLsGen4Read32 ((UINTN)Pcie, PAB_PEX_PIO_CTRL(0));
+ Val |= PPIO_EN;
+ PciLsGen4Write32 ((UINTN)Pcie, PAB_PEX_PIO_CTRL(0), Val);
+
+ } else {
+ // PCIe Layerscape Controller Setup
+ PcieLsSetupAtu (Pcie, Cfg0Base, Cfg1Base, MemBase, Mem64Base, IoBase);
+
+ // Program Class code for Layerscape PCIe controller
+ MmioWrite32 ((UINTN)Pcie + PCI_DBI_RO_WR_EN, 1);
+ Val = MmioRead32 ((UINTN)Pcie + PCI_CLASS_DEVICE);
+ Val &= ~(CLASS_CODE_MASK << CLASS_CODE_SHIFT);
+ Val |= (PCI_CLASS_BRIDGE_PCI << CLASS_CODE_SHIFT);
+ MmioWrite32 ((UINTN)Pcie + PCI_CLASS_DEVICE, Val);
+ MmioWrite32 ((UINTN)Pcie + PCI_DBI_RO_WR_EN, 0);
+ }
}
/**
--
2.7.4
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