UefiCpuPkg: Add CPU exception library for LoongArch

Added LoongArch exception handler into CpuExceptionHandlerLib.

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4734

Cc: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Chao Li <lichao@loongson.cn>
Co-authored-by: Baoqi Zhang <zhangbaoqi@loongson.cn>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>

1 files changed, 171 insertions, 0 deletions

diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/LoongArch/ExceptionCommon.c b/UefiCpuPkg/Library/CpuExceptionHandlerLib/LoongArch/ExceptionCommon.c
new file mode 100644
index 0000000000..801c8393e8
--- /dev/null
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/LoongArch/ExceptionCommon.c
@@ -0,0 +1,171 @@
+/** @file DxeExceptionLib.c

+

+  CPU Exception Handler Library common functions.

+

+  Copyright (c) 2024, Loongson Technology Corporation Limited. All rights reserved.<BR>

+

+  SPDX-License-Identifier: BSD-2-Clause-Patent

+**/

+

+#include <Library/BaseLib.h>

+#include <Library/PeCoffGetEntryPointLib.h>

+#include <Library/PrintLib.h>

+#include <Library/SerialPortLib.h>

+#include <Register/LoongArch64/Csr.h>

+#include "ExceptionCommon.h"

+

+CONST CHAR8  mExceptionReservedStr[] = "Reserved";

+CONST CHAR8  *mExceptionNameStr[]    = {

+  "#INT - Interrupt(CSR.ECFG.VS=0)",

+  "#PIL - Page invalid exception for Load option",

+  "#PIS - Page invalid exception for Store operation",

+  "#PIF - Page invalid exception for Fetch operation",

+  "#PME - Page modification exception",

+  "#PNR - Page non-readable exception",

+  "#PNX - Page non-executable exception",

+  "#PPI - Page privilege level illegal exception",

+  "#ADE - Address error exception",

+  "#ALE - Address alignment fault exception",

+  "#BCE - Bound check exception",

+  "#SYS - System call exception",

+  "#BRK - Beeakpoint exception",

+  "#INE - Instruction non-defined exception",

+  "#IPE - Instruction privilege error exception",

+  "#FPD - Floating-point instruction disable exception",

+  "#SXD - 128-bit vector (SIMD instructions) expansion instruction disable exception",

+  "#ASXD - 256-bit vector (Advanced SIMD instructions) expansion instruction disable exception",

+  "#FPE - Floating-Point error exception",

+  "#WPE - WatchPoint Exception for Fetch watchpoint or Memory load/store watchpoint",

+  "#BTD - Binary Translation expansion instruction Disable exception",

+  "#BTE - Binary Translation related exceptions",

+  "#GSPR - Guest Sensitive Privileged Resource exception",

+  "#HVC - HyperVisor Call exception",

+  "#GCXC - Guest CSR Software/Hardware Change exception",

+  "#TBR - TLB refill exception" // !!! NOTICE: Because the TLB refill exception is not instructed in ECODE, so the TLB refill exception must be the last one!

+};

+

+INTN  mExceptionKnownNameNum = (sizeof (mExceptionNameStr) / sizeof (CHAR8 *));

+

+/**

+  Get ASCII format string exception name by exception type.

+

+  @param ExceptionType  Exception type.

+

+  @return  ASCII format string exception name.

+

+**/

+CONST CHAR8 *

+GetExceptionNameStr (

+  IN EFI_EXCEPTION_TYPE  ExceptionType

+  )

+{

+  if ((UINTN)ExceptionType < mExceptionKnownNameNum) {

+    return mExceptionNameStr[ExceptionType];

+  } else {

+    return mExceptionReservedStr;

+  }

+}

+

+/**

+  Prints a message to the serial port.

+

+  @param  Format      Format string for the message to print.

+  @param  ...         Variable argument list whose contents are accessed

+                      based on the format string specified by Format.

+

+**/

+VOID

+EFIAPI

+InternalPrintMessage (

+  IN  CONST CHAR8  *Format,

+  ...

+  )

+{

+  CHAR8    Buffer[MAX_DEBUG_MESSAGE_LENGTH];

+  VA_LIST  Marker;

+

+  //

+  // Convert the message to an ASCII String

+  //

+  VA_START (Marker, Format);

+  AsciiVSPrint (Buffer, sizeof (Buffer), Format, Marker);

+  VA_END (Marker);

+

+  //

+  // Send the print string to a Serial Port

+  //

+  SerialPortWrite ((UINT8 *)Buffer, AsciiStrLen (Buffer));

+}

+

+/**

+  Find and display image base address and return image base and its entry point.

+

+  @param CurrentEra      Current instruction pointer.

+

+**/

+VOID

+DumpModuleImageInfo (

+  IN  UINTN  CurrentEra

+  )

+{

+  EFI_STATUS  Status;

+  UINTN       Pe32Data;

+  VOID        *PdbPointer;

+  VOID        *EntryPoint;

+

+  Pe32Data = PeCoffSearchImageBase (CurrentEra);

+  if (Pe32Data == 0) {

+    InternalPrintMessage ("!!!! Can't find image information. !!!!\n");

+  } else {

+    //

+    // Find Image Base entry point

+    //

+    Status = PeCoffLoaderGetEntryPoint ((VOID *)Pe32Data, &EntryPoint);

+    if (EFI_ERROR (Status)) {

+      EntryPoint = NULL;

+    }

+

+    InternalPrintMessage ("!!!! Find image based on IP(0x%x) ", CurrentEra);

+    PdbPointer = PeCoffLoaderGetPdbPointer ((VOID *)Pe32Data);

+    if (PdbPointer != NULL) {

+      InternalPrintMessage ("%a", PdbPointer);

+    } else {

+      InternalPrintMessage ("(No PDB) ");

+    }

+

+    InternalPrintMessage (

+      " (ImageBase=%016lp, EntryPoint=%016p) !!!!\n",

+      (VOID *)Pe32Data,

+      EntryPoint

+      );

+  }

+}

+

+/**

+  Default exception handler.

+

+  @param ExceptionType  Exception type.

+  @param SystemContext  Pointer to EFI_SYSTEM_CONTEXT.

+

+**/

+VOID

+EFIAPI

+DefaultExceptionHandler (

+  IN     EFI_EXCEPTION_TYPE  ExceptionType,

+  IN OUT EFI_SYSTEM_CONTEXT  SystemContext

+  )

+{

+  //

+  // Initialize the serial port before dumping.

+  //

+  SerialPortInitialize ();

+  //

+  // Display ExceptionType, CPU information and Image information

+  //

+  DumpImageAndCpuContent (ExceptionType, SystemContext);

+

+  //

+  // Enter a dead loop.

+  //

+  CpuDeadLoop ();

+}