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https://opencores.org/ocsvn/openrisc_2011-10-31/openrisc_2011-10-31/trunk
Subversion Repositories openrisc_2011-10-31
[/] [openrisc/] [trunk/] [orpsocv2/] [sw/] [drivers/] [or1200/] [exceptions.c] - Rev 542
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#include "or1200-utils.h" #include "int.h" // User interrupt handler header #include "uart.h" #include "printf.h" #define STR_EXCEPTION_OCCURED " exception occured.\n" char *exception_strings[] = { "An unknown", // 0 "A reset (?!)", // 1 "A Bus Error", // 2 "A Data Page Fault", // 3 "An Instruction Page Fault", // 4 "A Tick-Timer", // 5 "An Alignment", // 6 "An Illegal Instruction", // 7 "An External Interrupt", // 8 "A D-TLB Miss", // 9 "An I-TLB Miss", // a "A Range", // b "A System Call", // c "A Floating-Point", // d "A Trap", // e "A \"Reserved\"", // f "A \"Reserved\"", // 10 "A \"Reserved\"", // 11 "A \"Reserved\"", // 12 "A \"Reserved\"", // 13 "A \"Reserved\"", // 14 "An Implementation Specific \"Reserved\"", // 16 "An Implementation Specific \"Reserved\"", // 17 "An Implementation Specific \"Reserved\"", // 18 "A Custom", // 19 "A Custom", // 1a "A Custom", // 1b "A Custom", // 1c "A Custom", // 1d "A Custom", // 1e "A Custom", // 1f }; extern void int_main(void); extern void cpu_timer_tick(void); void (*except_handlers[]) (void) = {0, // 0 0, // 1 0, // 2 0, // 3 0, // 4 cpu_timer_tick, // 5 0, // 6 0, // 7 int_main, // 8 0, // 9 0, // a 0, // b 0, // c 0, // d 0, // e 0, // f 0, // 10 0, // 11 0, // 12 0}; // 13 void add_handler(unsigned long vector, void (*handler) (void)) { except_handlers[vector] = handler; } void default_exception_handler_c(unsigned exception_address,unsigned epc) { int exception_no = (exception_address >> 8) & 0x1f; if (except_handlers[exception_no]) { (*except_handlers[exception_no])(); return; } // init uart here, incase it hasn't been uart_init(DEFAULT_UART); printf("EPC = 0x%.8x\n", exception_address); // Output initial messaging using low-level functions incase // something really bad happened. printf("%s%s", exception_strings[exception_no], STR_EXCEPTION_OCCURED); // Icing on the cake using fancy functions printf("EPC = 0x%.8x\n", epc); report(exception_address); report(epc); __asm__("l.nop 1"); for(;;); }
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