7  * Copyright (C) 1994 - 1999 by Ralf Baechle
14  * Copyright (C) 2001 - 2013 Tensilica Inc.
78 #define USER		0x02  macro
81 { EXCCAUSE_COPROCESSOR ## x ## _DISABLED, USER, fast_coprocessor }
92 { EXCCAUSE_ILLEGAL_INSTRUCTION,	USER,	   fast_illegal_instruction_user },
95 { EXCCAUSE_SYSTEM_CALL,		USER,	   fast_syscall_user },
100 { EXCCAUSE_ALLOCA,		USER|KRNL, fast_alloca },
105 { EXCCAUSE_UNALIGNED,		USER,	   fast_unaligned },
112 { EXCCAUSE_ITLB_MISS,		USER|KRNL, fast_second_level_miss},
117 { EXCCAUSE_DTLB_MISS,		USER|KRNL, fast_second_level_miss},
122 { EXCCAUSE_STORE_CACHE_ATTRIBUTE,	USER|KRNL, fast_store_prohibited },
155 { -1, -1, 0 }
160  * 1. it contains three dispatch tables (fast_user, fast_kernel, default-c)
177  * Unhandled Exceptions. Kill user task or panic if in kernel space.
182 	__die_if_kernel("Caught unhandled exception - should not happen",  in do_unhandled()
185 	/* If in user mode, send SIGILL signal to current process */  in do_unhandled()
187 			    "(pid = %d, pc = %#010lx) - should not happen\n"  in do_unhandled()
189 			    current->comm, task_pid_nr(current), regs->pc,  in do_unhandled()
195  * Multi-hit exception. This if fatal!
211 #define IS_POW2(v) (((v) & ((v) - 1)) == 0)
215 #warning "Fake NMI is requested for PMM, but there are other IRQs at or above its level."
245 	if ((regs->ps & PS_INTLEVEL_MASK) < LOCKLEVEL)  in do_nmi()
281 		unsigned level;  in do_interrupt()  local
283 		for (level = LOCKLEVEL; level > 0; --level) {  in do_interrupt()
284 			if (int_at_level & int_level_mask[level]) {  in do_interrupt()
285 				int_at_level &= int_level_mask[level];  in do_interrupt()
290 		if (level == 0)  in do_interrupt()
309 	/* If in user mode, send SIGILL signal to current process. */  in do_illegal_instruction()
312 			    current->comm, task_pid_nr(current), regs->pc);  in do_illegal_instruction()
318  * Handle unaligned memory accesses from user space. Kill task.
321  * accesses causes from user space.
331 	current->thread.bad_vaddr = regs->excvaddr;  in do_unaligned_user()
332 	current->thread.error_code = -3;  in do_unaligned_user()
335 			    regs->excvaddr, current->comm,  in do_unaligned_user()
336 			    task_pid_nr(current), regs->pc);  in do_unaligned_user()
337 	force_sig_fault(SIGBUS, BUS_ADRALN, (void *) regs->excvaddr);  in do_unaligned_user()
359 	/* If in user mode, send SIGTRAP signal to current process */  in do_debug()
373 /* Set exception C handler - for temporary use when probing exceptions */
394 	this_cpu_ptr(&debug_table)->debug_exception = debug_exception;  in trap_init_debug()
405  * - fast user		first dispatch table for user exceptions
406  * - fast kernel	first dispatch table for kernel exceptions
407  * - default C-handler	C-handler called by the default fast handler.
433 		if ((fast & USER) != 0)  in trap_init()
462 	wmask = regs->wmask & ~1;  in show_regs()
467 		pr_cont(" %08lx", regs->areg[i]);  in show_regs()
471 		regs->pc, regs->ps, regs->depc, regs->excvaddr);  in show_regs()
473 		regs->lbeg, regs->lend, regs->lcount, regs->sar);  in show_regs()
476 			regs->windowbase, regs->windowstart, regs->wmask,  in show_regs()
477 			regs->syscall);  in show_regs()
484 	if (kernel_text_address(frame->pc))  in show_trace_cb()
486 			loglvl, frame->pc, (void *)frame->pc);  in show_trace_cb()
511 	len = min((-(size_t)sp) & (THREAD_SIZE - STACK_DUMP_ENTRY_SIZE),  in show_stack()
537 		show_stack(NULL, (unsigned long *)regs->areg[1], KERN_INFO);  in die()