32 static inline enum direction decode_direction(unsigned int insn)  in decode_direction()  argument
34 	unsigned long tmp = (insn >> 21) & 1;  in decode_direction()
39 		if(((insn>>19)&0x3f) == 15)  in decode_direction()
47 static inline int decode_access_size(unsigned int insn)  in decode_access_size()  argument
49 	insn = (insn >> 19) & 3;  in decode_access_size()
51 	if(!insn)  in decode_access_size()
53 	else if(insn == 3)  in decode_access_size()
55 	else if(insn == 2)  in decode_access_size()
58 		printk("Impossible unaligned trap. insn=%08x\n", insn);  in decode_access_size()
65 static inline int decode_signedness(unsigned int insn)  in decode_signedness()  argument
67 	return (insn & 0x400000);  in decode_signedness()
135 					       unsigned int insn)  in compute_effective_address()  argument
137 	unsigned int rs1 = (insn >> 14) & 0x1f;  in compute_effective_address()
138 	unsigned int rs2 = insn & 0x1f;  in compute_effective_address()
139 	unsigned int rd = (insn >> 25) & 0x1f;  in compute_effective_address()
141 	if(insn & 0x2000) {  in compute_effective_address()
143 		return (fetch_reg(rs1, regs) + sign_extend_imm13(insn));  in compute_effective_address()
151 					     unsigned int insn)  in safe_compute_effective_address()  argument
153 	unsigned int rs1 = (insn >> 14) & 0x1f;  in safe_compute_effective_address()
154 	unsigned int rs2 = insn & 0x1f;  in safe_compute_effective_address()
155 	unsigned int rd = (insn >> 25) & 0x1f;  in safe_compute_effective_address()
157 	if(insn & 0x2000) {  in safe_compute_effective_address()
159 		return (safe_fetch_reg(rs1, regs) + sign_extend_imm13(insn));  in safe_compute_effective_address()
203 static inline int floating_point_load_or_store_p(unsigned int insn)  in floating_point_load_or_store_p()  argument
205 	return (insn >> 24) & 1;  in floating_point_load_or_store_p()
208 static inline int ok_for_kernel(unsigned int insn)  in ok_for_kernel()  argument
210 	return !floating_point_load_or_store_p(insn);  in ok_for_kernel()
213 static void kernel_mna_trap_fault(struct pt_regs *regs, unsigned int insn)  in kernel_mna_trap_fault()  argument
219 		unsigned long address = compute_effective_address(regs, insn);  in kernel_mna_trap_fault()
239 asmlinkage void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn)  in kernel_unaligned_trap()  argument
241 	enum direction dir = decode_direction(insn);  in kernel_unaligned_trap()
242 	int size = decode_access_size(insn);  in kernel_unaligned_trap()
244 	if(!ok_for_kernel(insn) || dir == both) {  in kernel_unaligned_trap()
249 		unsigned long addr = compute_effective_address(regs, insn);  in kernel_unaligned_trap()
255 			err = do_int_load(fetch_reg_addr(((insn>>25)&0x1f),  in kernel_unaligned_trap()
258 					  decode_signedness(insn));  in kernel_unaligned_trap()
262 			err = do_int_store(((insn>>25)&0x1f), size,  in kernel_unaligned_trap()
270 			kernel_mna_trap_fault(regs, insn);  in kernel_unaligned_trap()
276 static inline int ok_for_user(struct pt_regs *regs, unsigned int insn,  in ok_for_user()  argument
281 	int size = ((insn >> 19) & 3) == 3 ? 8 : 4;  in ok_for_user()
290 	reg = (insn >> 25) & 0x1f;  in ok_for_user()
295 	reg = (insn >> 14) & 0x1f;  in ok_for_user()
300 	if (!(insn & 0x2000)) {  in ok_for_user()
301 		reg = (insn & 0x1f);  in ok_for_user()
311 static void user_mna_trap_fault(struct pt_regs *regs, unsigned int insn)  in user_mna_trap_fault()  argument
318 	info.si_addr = (void __user *)safe_compute_effective_address(regs, insn);  in user_mna_trap_fault()
323 asmlinkage void user_unaligned_trap(struct pt_regs *regs, unsigned int insn)  in user_unaligned_trap()  argument
328 	   (((insn >> 30) & 3) != 3))  in user_unaligned_trap()
330 	dir = decode_direction(insn);  in user_unaligned_trap()
331 	if(!ok_for_user(regs, insn, dir)) {  in user_unaligned_trap()
334 		int err, size = decode_access_size(insn);  in user_unaligned_trap()
337 		if(floating_point_load_or_store_p(insn)) {  in user_unaligned_trap()
342 		addr = compute_effective_address(regs, insn);  in user_unaligned_trap()
346 			err = do_int_load(fetch_reg_addr(((insn>>25)&0x1f),  in user_unaligned_trap()
349 					  decode_signedness(insn));  in user_unaligned_trap()
353 			err = do_int_store(((insn>>25)&0x1f), size,  in user_unaligned_trap()
378 	user_mna_trap_fault(regs, insn);  in user_unaligned_trap()