The serial debug port must be initialised by the firmware. This
is done by SetupDebugUart when DynamicTables Framework
is used.
However, the address range for the serial debug port must
be mapped. Otherwise this results in a page fault when the
serial port is accessed.
Therefore, update the page tables to add the address range
covering the serial debug port.
Signed-off-by: levi.yun <yeoreum....@arm.com>
---
Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLib.inf | 1 +
Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLibMem.c | 12 +++++++++++-
2 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLib.inf
b/Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLib.inf
index
020bde0d1f567d0b379fe2323dd6bf0dc4f7c1ce..539d2a460d56d400cf37a5c2ad3fbe9ad2e705bd
100644
--- a/Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLib.inf
+++ b/Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLib.inf
@@ -40,6 +40,7 @@ [FixedPcd]
gArmPlatformTokenSpaceGuid.PcdClusterCount
gArmPlatformTokenSpaceGuid.PcdCoreCount
gArmPlatformTokenSpaceGuid.PcdArmHdLcdBase
+ gArmPlatformTokenSpaceGuid.PcdSerialDbgRegisterBase
gArmSgiTokenSpaceGuid.PcdDramBlock2Base
gArmSgiTokenSpaceGuid.PcdDramBlock2Size
diff --git a/Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLibMem.c
b/Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLibMem.c
index
fa3cfbc730f6ff94cd8a46694f99ea0a1ace9e00..92ca6bf64ab2781e09d31a90ecb5ce05c4e7027b
100644
--- a/Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLibMem.c
+++ b/Platform/ARM/SgiPkg/Library/PlatformLib/PlatformLibMem.c
@@ -18,7 +18,7 @@
// Total number of descriptors, including the final "end-of-table" descriptor.
#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS
\
- ((14 + (FixedPcdGet32 (PcdChipCount) * 2)) +
\
+ ((15 + (FixedPcdGet32 (PcdChipCount) * 2)) +
\
(FixedPcdGet32 (PcdIoVirtSocExpBlkUartEnable) *
\
FixedPcdGet32 (PcdChipCount) * 2))
@@ -184,6 +184,16 @@ ArmPlatformGetVirtualMemoryMap (
VirtualMemoryTable[Index].Length = SIZE_64KB;
VirtualMemoryTable[Index].Attributes =
ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
+ /**
+ * DynamicTable initializes debug serial port. And OS expects firmware
initalizes it.
+ * So, add mapping for DbgRegisterBase.
+ */
+ VirtualMemoryTable[++Index].PhysicalBase = FixedPcdGet64
(PcdSerialDbgRegisterBase);
+ VirtualMemoryTable[Index].VirtualBase = FixedPcdGet64
(PcdSerialDbgRegisterBase);
+ VirtualMemoryTable[Index].Length = SIZE_4KB;
+ VirtualMemoryTable[Index].Attributes =
ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
+
+
#if (FixedPcdGet32 (PcdIoVirtSocExpBlkUartEnable) == 1)
// Chip-0 IO Virtualization SoC Expansion Block - UART0
IO_VIRT_SOC_EXP_BLK_UART_MMAP(0, 0)
--
Guid("CE165669-3EF3-493F-B85D-6190EE5B9759")
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