Normally, DXE driver would add device resource to GCD before start using.
But some key resources such as uart, flash base address are being accessing
directly in some core modules.
Those resources should be populated to HOB in SEC phase so they are
added to GCD before anyone can access them.
Signed-off-by: Tuan Phan <tp...@ventanamicro.com>
---
OvmfPkg/RiscVVirt/Sec/Platform.c | 62 +++++++++++++++++++++++++++++++
OvmfPkg/RiscVVirt/Sec/SecMain.inf | 1 +
2 files changed, 63 insertions(+)
diff --git a/OvmfPkg/RiscVVirt/Sec/Platform.c b/OvmfPkg/RiscVVirt/Sec/Platform.c
index e8fd126cf800..63bc21eb3f60 100644
--- a/OvmfPkg/RiscVVirt/Sec/Platform.c
+++ b/OvmfPkg/RiscVVirt/Sec/Platform.c
@@ -21,6 +21,63 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
#include <libfdt.h>
#include <Guid/FdtHob.h>
+/**
+ Build memory map I/O range resource HOB using the
+ base address and size.
+
+ @param MemoryBase Memory map I/O base.
+ @param MemorySize Memory map I/O size.
+
+**/
+STATIC
+VOID
+AddIoMemoryBaseSizeHob (
+ EFI_PHYSICAL_ADDRESS MemoryBase,
+ UINT64 MemorySize
+ )
+{
+ /* Align to EFI_PAGE_SIZE */
+ MemorySize = ALIGN_VALUE (MemorySize, EFI_PAGE_SIZE);
+ BuildResourceDescriptorHob (
+ EFI_RESOURCE_MEMORY_MAPPED_IO,
+ EFI_RESOURCE_ATTRIBUTE_PRESENT |
+ EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
+ EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
+ EFI_RESOURCE_ATTRIBUTE_TESTED,
+ MemoryBase,
+ MemorySize
+ );
+}
+
+/**
+ Populate IO resources from FDT that not added to GCD by its
+ driver in the DXE phase.
+
+ @param FdtBase Fdt base address
+ @param Compatible Compatible string
+
+**/
+STATIC
+VOID
+PopulateIoResources (
+ VOID *FdtBase,
+ CONST CHAR8* Compatible
+ )
+{
+ UINT64 *Reg;
+ INT32 Node, LenP;
+
+ Node = fdt_node_offset_by_compatible (FdtBase, -1, Compatible);
+ while (Node != -FDT_ERR_NOTFOUND) {
+ Reg = (UINT64 *)fdt_getprop (FdtBase, Node, "reg", &LenP);
+ if (Reg) {
+ ASSERT (LenP == (2 * sizeof (UINT64)));
+ AddIoMemoryBaseSizeHob (SwapBytes64 (Reg[0]), SwapBytes64 (Reg[1]));
+ }
+ Node = fdt_node_offset_by_compatible (FdtBase, Node, Compatible);
+ }
+}
+
/**
@retval EFI_SUCCESS The address of FDT is passed in HOB.
EFI_UNSUPPORTED Can't locate FDT.
@@ -80,5 +137,10 @@ PlatformPeimInitialization (
BuildFvHob (PcdGet32 (PcdOvmfDxeMemFvBase), PcdGet32 (PcdOvmfDxeMemFvSize));
+ PopulateIoResources (Base, "ns16550a");
+ PopulateIoResources (Base, "qemu,fw-cfg-mmio");
+ PopulateIoResources (Base, "virtio,mmio");
+ AddIoMemoryBaseSizeHob (PcdGet32 (PcdOvmfFdBaseAddress), PcdGet32
(PcdOvmfFirmwareFdSize));
+
return EFI_SUCCESS;
}
diff --git a/OvmfPkg/RiscVVirt/Sec/SecMain.inf
b/OvmfPkg/RiscVVirt/Sec/SecMain.inf
index aed35d3af596..e1f562264eea 100644
--- a/OvmfPkg/RiscVVirt/Sec/SecMain.inf
+++ b/OvmfPkg/RiscVVirt/Sec/SecMain.inf
@@ -61,6 +61,7 @@
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPeiTempRamBase
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPeiTempRamSize
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFdBaseAddress
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFirmwareFdSize
[Guids]
gFdtHobGuid
--
2.25.1
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