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/** @file ArchExceptionHandler.c
LoongArch64 CPU Exception Handler.
Copyright (c) 2024, Loongson Technology Corporation Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Library/BaseLib.h>
#include <Register/LoongArch64/Csr.h>
#include "ExceptionCommon.h"
/**
Get Exception Type
@param[in] SystemContext Pointer to EFI_SYSTEM_CONTEXT.
@return LoongArch64 exception type.
**/
EFI_EXCEPTION_TYPE
EFIAPI
GetExceptionType (
IN EFI_SYSTEM_CONTEXT SystemContext
)
{
EFI_EXCEPTION_TYPE ExceptionType;
ExceptionType = (SystemContext.SystemContextLoongArch64->ESTAT & CSR_ESTAT_EXC);
return ExceptionType;
}
/**
Get Interrupt Type
@param[in] SystemContext Pointer to EFI_SYSTEM_CONTEXT.
@return LoongArch64 intrrupt type.
**/
EFI_EXCEPTION_TYPE
EFIAPI
GetInterruptType (
IN EFI_SYSTEM_CONTEXT SystemContext
)
{
EFI_EXCEPTION_TYPE InterruptType;
for (InterruptType = 0; InterruptType <= EXCEPT_LOONGARCH_INT_IPI; InterruptType++) {
if (SystemContext.SystemContextLoongArch64->ESTAT & (1 << InterruptType)) {
//
// 0 - EXCEPT_LOONGARCH_INT_SIP0
// 1 - EXCEPT_LOONGARCH_INT_SIP1
// 2 - EXCEPT_LOONGARCH_INT_IP0
// 3 - EXCEPT_LOONGARCH_INT_IP1
// 4 - EXCEPT_LOONGARCH_INT_IP2
// 5 - EXCEPT_LOONGARCH_INT_IP3
// 6 - EXCEPT_LOONGARCH_INT_IP4
// 7 - EXCEPT_LOONGARCH_INT_IP5
// 8 - EXCEPT_LOONGARCH_INT_IP6
// 9 - EXCEPT_LOONGARCH_INT_IP7
// 10 - EXCEPT_LOONGARCH_INT_PMC
// 11 - EXCEPT_LOONGARCH_INT_TIMER
// 12 - EXCEPT_LOONGARCH_INT_IPI
// Greater than EXCEPT_LOONGARCH_INI_IPI is currently invalid.
//
return InterruptType;
}
}
//
// Invalid IRQ
//
return 0xFF;
}
/**
Display CPU information.
@param ExceptionType Exception type.
@param SystemContext Pointer to EFI_SYSTEM_CONTEXT.
**/
VOID
EFIAPI
DumpCpuContext (
IN EFI_EXCEPTION_TYPE ExceptionType,
IN EFI_SYSTEM_CONTEXT SystemContext
)
{
InternalPrintMessage (
"\n!!!! LoongArch64 Exception Type - %02x(%a) !!!!\n",
ExceptionType,
GetExceptionNameStr (ExceptionType)
);
//
// Dump TLB refill ERA and BADV
//
if (ExceptionType == (mExceptionKnownNameNum - 1)) {
InternalPrintMessage ("TLB refill ERA 0x%llx\n", (CsrRead (LOONGARCH_CSR_TLBRERA) & (~0x3ULL)));
InternalPrintMessage ("TLB refill BADV 0x%llx\n", CsrRead (LOONGARCH_CSR_TLBRBADV));
}
//
// Dump the general registers
//
InternalPrintMessage (
"Zero - 0x%016lx, RA - 0x%016lx, TP - 0x%016lx, SP - 0x%016lx\n",
SystemContext.SystemContextLoongArch64->R0,
SystemContext.SystemContextLoongArch64->R1,
SystemContext.SystemContextLoongArch64->R2,
SystemContext.SystemContextLoongArch64->R3
);
InternalPrintMessage (
" A0 - 0x%016lx, A1 - 0x%016lx, A2 - 0x%016lx, A3 - 0x%016lx\n",
SystemContext.SystemContextLoongArch64->R4,
SystemContext.SystemContextLoongArch64->R5,
SystemContext.SystemContextLoongArch64->R6,
SystemContext.SystemContextLoongArch64->R7
);
InternalPrintMessage (
" A4 - 0x%016lx, A5 - 0x%016lx, A6 - 0x%016lx, A7 - 0x%016lx\n",
SystemContext.SystemContextLoongArch64->R8,
SystemContext.SystemContextLoongArch64->R9,
SystemContext.SystemContextLoongArch64->R10,
SystemContext.SystemContextLoongArch64->R11
);
InternalPrintMessage (
" T0 - 0x%016lx, T1 - 0x%016lx, T2 - 0x%016lx, T3 - 0x%016lx\n",
SystemContext.SystemContextLoongArch64->R12,
SystemContext.SystemContextLoongArch64->R13,
SystemContext.SystemContextLoongArch64->R14,
SystemContext.SystemContextLoongArch64->R15
);
InternalPrintMessage (
" T4 - 0x%016lx, T5 - 0x%016lx, T6 - 0x%016lx, T7 - 0x%016lx\n",
SystemContext.SystemContextLoongArch64->R16,
SystemContext.SystemContextLoongArch64->R17,
SystemContext.SystemContextLoongArch64->R18,
SystemContext.SystemContextLoongArch64->R19
);
InternalPrintMessage (
" T8 - 0x%016lx, R21 - 0x%016lx, FP - 0x%016lx, S0 - 0x%016lx\n",
SystemContext.SystemContextLoongArch64->R20,
SystemContext.SystemContextLoongArch64->R21,
SystemContext.SystemContextLoongArch64->R22,
SystemContext.SystemContextLoongArch64->R23
);
InternalPrintMessage (
" S1 - 0x%016lx, S2 - 0x%016lx, S3 - 0x%016lx, S4 - 0x%016lx\n",
SystemContext.SystemContextLoongArch64->R24,
SystemContext.SystemContextLoongArch64->R25,
SystemContext.SystemContextLoongArch64->R26,
SystemContext.SystemContextLoongArch64->R27
);
InternalPrintMessage (
" S5 - 0x%016lx, S6 - 0x%016lx, S7 - 0x%016lx, S8 - 0x%016lx\n",
SystemContext.SystemContextLoongArch64->R28,
SystemContext.SystemContextLoongArch64->R29,
SystemContext.SystemContextLoongArch64->R30,
SystemContext.SystemContextLoongArch64->R31
);
InternalPrintMessage ("\n");
//
// Dump the CSR registers
//
InternalPrintMessage (
"CRMD - 0x%016lx, PRMD - 0x%016lx, EUEN - 0x%016lx, MISC - 0x%016lx\n",
SystemContext.SystemContextLoongArch64->CRMD,
SystemContext.SystemContextLoongArch64->PRMD,
SystemContext.SystemContextLoongArch64->EUEN,
SystemContext.SystemContextLoongArch64->MISC
);
InternalPrintMessage (
"ECFG - 0x%016lx, ESTAT - 0x%016lx, ERA - 0x%016lx, BADV - 0x%016lx\n",
SystemContext.SystemContextLoongArch64->ECFG,
SystemContext.SystemContextLoongArch64->ESTAT,
SystemContext.SystemContextLoongArch64->ERA,
SystemContext.SystemContextLoongArch64->BADV
);
InternalPrintMessage (
"BADI - 0x%016lx\n",
SystemContext.SystemContextLoongArch64->BADI
);
}
/**
Display CPU information.
@param ExceptionType Exception type.
@param SystemContext Pointer to EFI_SYSTEM_CONTEXT.
**/
VOID
DumpImageAndCpuContent (
IN EFI_EXCEPTION_TYPE ExceptionType,
IN EFI_SYSTEM_CONTEXT SystemContext
)
{
DumpCpuContext (ExceptionType, SystemContext);
if (ExceptionType == (mExceptionKnownNameNum - 1)) {
//
// Dump TLB refill image info
//
DumpModuleImageInfo ((CsrRead (LOONGARCH_CSR_TLBRERA) & (~0x3ULL)));
} else {
DumpModuleImageInfo (SystemContext.SystemContextLoongArch64->ERA);
}
}
/**
IPI Interrupt Handler.
@param InterruptType The type of interrupt that occurred
@param SystemContext A pointer to the system context when the interrupt occurred
**/
VOID
EFIAPI
IpiInterruptHandler (
IN EFI_EXCEPTION_TYPE InterruptType,
IN EFI_SYSTEM_CONTEXT SystemContext
)
{
UINTN ResumeVector;
UINTN Parameter;
//
// Clear interrupt.
//
IoCsrWrite32 (LOONGARCH_IOCSR_IPI_CLEAR, IoCsrRead32 (LOONGARCH_IOCSR_IPI_STATUS));
//
// Get the resume vector and parameter if populated.
//
ResumeVector = IoCsrRead64 (LOONGARCH_IOCSR_MBUF0);
Parameter = IoCsrRead64 (LOONGARCH_IOCSR_MBUF3);
//
// Clean up current processor mailbox 0 and mailbox 3.
//
IoCsrWrite64 (LOONGARCH_IOCSR_MBUF0, 0x0);
IoCsrWrite64 (LOONGARCH_IOCSR_MBUF3, 0x0);
//
// If mailbox 0 is non-NULL, it means that the BSP or other cores called the IPI to wake
// up the current core and let it use the resume vector stored in mailbox 0.
//
// If both the resume vector and parameter are non-NULL, it means that the IPI was
// called in the BIOS.
//
// The situation where the resume vector is non-NULL and the parameter is NULL has been
// processed after the exception entry is pushed onto the stack.
//
if ((ResumeVector != 0) && (Parameter != 0)) {
SystemContext.SystemContextLoongArch64->ERA = ResumeVector;
//
// Set $a0 as APIC ID and $a1 as parameter value.
//
SystemContext.SystemContextLoongArch64->R4 = CsrRead (LOONGARCH_CSR_CPUNUM);
SystemContext.SystemContextLoongArch64->R5 = Parameter;
}
MemoryFence ();
}
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