7  * Copyright (C) 1994 - 1999 by Ralf Baechle
14  * Copyright (C) 2001 - 2013 Tensilica Inc.
73 #define USER		0x02  macro
76 { EXCCAUSE_COPROCESSOR ## x ## _DISABLED, USER|KRNL, fast_coprocessor },\
88 { EXCCAUSE_ILLEGAL_INSTRUCTION,	USER,	   fast_illegal_instruction_user },
91 { EXCCAUSE_SYSTEM_CALL,		USER,	   fast_syscall_user },
97 { EXCCAUSE_ALLOCA,		USER|KRNL, fast_alloca },
103 { EXCCAUSE_UNALIGNED,		USER,	   fast_unaligned },
110 { EXCCAUSE_ITLB_MISS,			USER|KRNL, fast_second_level_miss},
111 { EXCCAUSE_DTLB_MISS,			USER|KRNL, fast_second_level_miss},
113 { EXCCAUSE_STORE_CACHE_ATTRIBUTE,	USER|KRNL, fast_store_prohibited },
153 { -1, -1, 0 }
158  * 1. it contains three dispatch tables (fast_user, fast_kernel, default-c)
175  * Unhandled Exceptions. Kill user task or panic if in kernel space.
180 	__die_if_kernel("Caught unhandled exception - should not happen",  in do_unhandled()
183 	/* If in user mode, send SIGILL signal to current process */  in do_unhandled()
185 			    "(pid = %d, pc = %#010lx) - should not happen\n"  in do_unhandled()
187 			    current->comm, task_pid_nr(current), regs->pc,  in do_unhandled()
188 			    regs->exccause);  in do_unhandled()
193  * Multi-hit exception. This if fatal!
207 #define IS_POW2(v) (((v) & ((v) - 1)) == 0)
211 #warning "Fake NMI is requested for PMM, but there are other IRQs at or above its level."
271 		unsigned level;  in do_interrupt()  local
273 		for (level = LOCKLEVEL; level > 0; --level) {  in do_interrupt()
274 			if (int_at_level & int_level_mask[level]) {  in do_interrupt()
275 				int_at_level &= int_level_mask[level];  in do_interrupt()
279 					unhandled |= int_level_mask[level];  in do_interrupt()
284 		if (level == 0)  in do_interrupt()
288 		unhandled ^= (int_at_level & -int_at_level);  in do_interrupt()
303 		if (copy_from_user(buf, (void __user *)regs->pc + 2, 5))  in check_div0()
307 		p = (const u8 *)regs->pc + 2;  in check_div0()
329 	if (regs->pc == current_thread_info()->ps_woe_fix_addr)  in do_illegal_instruction()
330 		regs->ps &= ~PS_WOE_MASK;  in do_illegal_instruction()
339 	/* If in user mode, send SIGILL signal to current process. */  in do_illegal_instruction()
342 			    current->comm, task_pid_nr(current), regs->pc);  in do_illegal_instruction()
349 	force_sig_fault(SIGFPE, FPE_INTDIV, (void __user *)regs->pc);  in do_div0()
353  * Handle unaligned memory accesses from user space. Kill task.
356  * accesses causes from user space.
365 	current->thread.bad_vaddr = regs->excvaddr;  in do_unaligned_user()
366 	current->thread.error_code = -3;  in do_unaligned_user()
369 			    regs->excvaddr, current->comm,  in do_unaligned_user()
370 			    task_pid_nr(current), regs->pc);  in do_unaligned_user()
371 	force_sig_fault(SIGBUS, BUS_ADRALN, (void *) regs->excvaddr);  in do_unaligned_user()
399 	/* If in user mode, send SIGTRAP signal to current process */  in do_debug()
413 /* Set exception C handler - for temporary use when probing exceptions */
434 	this_cpu_ptr(&debug_table)->debug_exception = debug_exception;  in trap_init_debug()
445  * - fast user		first dispatch table for user exceptions
446  * - fast kernel	first dispatch table for kernel exceptions
447  * - default C-handler	C-handler called by the default fast handler.
473 		if ((fast & USER) != 0)  in trap_init()
505 		pr_cont(" %08lx", regs->areg[i]);  in show_regs()
509 		regs->pc, regs->ps, regs->depc, regs->excvaddr);  in show_regs()
511 		regs->lbeg, regs->lend, regs->lcount, regs->sar);  in show_regs()
514 			regs->windowbase, regs->windowstart, regs->wmask,  in show_regs()
515 			regs->syscall);  in show_regs()
522 	if (kernel_text_address(frame->pc))  in show_trace_cb()
524 			loglvl, frame->pc, (void *)frame->pc);  in show_trace_cb()
549 	len = min((-(size_t)sp) & (THREAD_SIZE - STACK_DUMP_ENTRY_SIZE),  in show_stack()
575 		show_stack(NULL, (unsigned long *)regs->areg[1], KERN_INFO);  in die()