108 lines
2.5 KiB
C
108 lines
2.5 KiB
C
#include <common.h>
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#include <asm/mipsregs.h>
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void barebox_exc_handler(void *regs);
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/*
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* Trap codes from OpenBSD trap.h
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*/
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#define T_INT 0 /* Interrupt pending */
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#define T_TLB_MOD 1 /* TLB modified fault */
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#define T_TLB_LD_MISS 2 /* TLB miss on load or ifetch */
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#define T_TLB_ST_MISS 3 /* TLB miss on a store */
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#define T_ADDR_ERR_LD 4 /* Address error on a load or ifetch */
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#define T_ADDR_ERR_ST 5 /* Address error on a store */
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#define T_BUS_ERR_IFETCH 6 /* Bus error on an ifetch */
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#define T_BUS_ERR_LD_ST 7 /* Bus error on a load or store */
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#define T_SYSCALL 8 /* System call */
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#define T_BREAK 9 /* Breakpoint */
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#define T_RES_INST 10 /* Reserved instruction exception */
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#define T_COP_UNUSABLE 11 /* Coprocessor unusable */
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#define T_OVFLOW 12 /* Arithmetic overflow */
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#define T_TRAP 13 /* Trap instruction */
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#define T_VCEI 14 /* Virtual coherency instruction */
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#define T_FPE 15 /* Floating point exception */
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#define T_IWATCH 16 /* Inst. Watch address reference */
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#define T_DWATCH 23 /* Data Watch address reference */
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#define T_VCED 31 /* Virtual coherency data */
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#define CR_EXC_CODE 0x0000007c
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#define CR_EXC_CODE_SHIFT 2
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static char *get_exc_name(u32 cause)
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{
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switch ((cause & CR_EXC_CODE) >> CR_EXC_CODE_SHIFT) {
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case T_INT:
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return "interrupt pending";
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case T_TLB_MOD:
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return "TLB modified";
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case T_TLB_LD_MISS:
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return "TLB miss on load or ifetch";
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case T_TLB_ST_MISS:
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return "TLB miss on store";
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case T_ADDR_ERR_LD:
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return "address error on load or ifetch";
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case T_ADDR_ERR_ST:
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return "address error on store";
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case T_BUS_ERR_IFETCH:
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return "bus error on ifetch";
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case T_BUS_ERR_LD_ST:
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return "bus error on load or store";
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case T_SYSCALL:
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return "system call";
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case T_BREAK:
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return "breakpoint";
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case T_RES_INST:
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return "reserved instruction";
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case T_COP_UNUSABLE:
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return "coprocessor unusable";
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case T_OVFLOW:
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return "arithmetic overflow";
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case T_TRAP:
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return "trap instruction";
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case T_VCEI:
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return "virtual coherency instruction";
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case T_FPE:
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return "floating point";
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case T_IWATCH:
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return "iwatch";
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case T_DWATCH:
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return "dwatch";
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case T_VCED:
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return "virtual coherency data";
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}
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return "unknown exception";
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}
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void barebox_exc_handler(void *regs)
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{
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printf("\nOoops, %s!\n", get_exc_name(read_c0_cause()));
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printf("EPC = 0x%08x\n", read_c0_epc());
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printf("CP0_STATUS = 0x%08x\n", read_c0_status());
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printf("CP0_CAUSE = 0x%08x\n", read_c0_cause());
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printf("CP0_CONFIG = 0x%08x\n\n", read_c0_config());
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hang();
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}
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