Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * OpenRISC traps.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Linux architectural port borrowing liberally from similar works of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * others.  All original copyrights apply as per the original source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * declaration.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * Modifications for the OpenRISC architecture:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  *  Here we handle the break vectors not used by the system call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  *  mechanism, as well as some general stack/register dumping
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  *  things.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/sched/debug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/sched/task_stack.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/extable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/kmod.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <linux/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #include <linux/kallsyms.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #include <asm/unwinder.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #include <asm/sections.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) int kstack_depth_to_print = 0x180;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) int lwa_flag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) unsigned long __user *lwa_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) void print_trace(void *data, unsigned long addr, int reliable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	const char *loglvl = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	printk("%s[<%p>] %s%pS\n", loglvl, (void *) addr, reliable ? "" : "? ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	       (void *) addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) /* displays a short stack trace */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) void show_stack(struct task_struct *task, unsigned long *esp, const char *loglvl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	if (esp == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 		esp = (unsigned long *)&esp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	printk("%sCall trace:\n", loglvl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	unwind_stack((void *)loglvl, esp, print_trace);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) void show_registers(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	int in_kernel = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	unsigned long esp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	esp = (unsigned long)(regs->sp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	if (user_mode(regs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		in_kernel = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	printk("CPU #: %d\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	       "   PC: %08lx    SR: %08lx    SP: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	       smp_processor_id(), regs->pc, regs->sr, regs->sp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	printk("GPR00: %08lx GPR01: %08lx GPR02: %08lx GPR03: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	       0L, regs->gpr[1], regs->gpr[2], regs->gpr[3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	printk("GPR04: %08lx GPR05: %08lx GPR06: %08lx GPR07: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	       regs->gpr[4], regs->gpr[5], regs->gpr[6], regs->gpr[7]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	printk("GPR08: %08lx GPR09: %08lx GPR10: %08lx GPR11: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	       regs->gpr[8], regs->gpr[9], regs->gpr[10], regs->gpr[11]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	printk("GPR12: %08lx GPR13: %08lx GPR14: %08lx GPR15: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	       regs->gpr[12], regs->gpr[13], regs->gpr[14], regs->gpr[15]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	printk("GPR16: %08lx GPR17: %08lx GPR18: %08lx GPR19: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	       regs->gpr[16], regs->gpr[17], regs->gpr[18], regs->gpr[19]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	printk("GPR20: %08lx GPR21: %08lx GPR22: %08lx GPR23: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	       regs->gpr[20], regs->gpr[21], regs->gpr[22], regs->gpr[23]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	printk("GPR24: %08lx GPR25: %08lx GPR26: %08lx GPR27: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	       regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	printk("GPR28: %08lx GPR29: %08lx GPR30: %08lx GPR31: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	       regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	printk("  RES: %08lx oGPR11: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	       regs->gpr[11], regs->orig_gpr11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	printk("Process %s (pid: %d, stackpage=%08lx)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	       current->comm, current->pid, (unsigned long)current);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	 * When in-kernel, we also print out the stack and code at the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	 * time of the fault..
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	if (in_kernel) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		printk("\nStack: ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		show_stack(NULL, (unsigned long *)esp, KERN_EMERG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		printk("\nCode: ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		if (regs->pc < PAGE_OFFSET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 			goto bad;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		for (i = -24; i < 24; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 			unsigned char c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 			if (__get_user(c, &((unsigned char *)regs->pc)[i])) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) bad:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 				printk(" Bad PC value.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 			if (i == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 				printk("(%02x) ", c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 			else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 				printk("%02x ", c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	printk("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) void nommu_dump_state(struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		      unsigned long ea, unsigned long vector)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	unsigned long addr, stack = regs->sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	printk("\n\r[nommu_dump_state] :: ea %lx, vector %lx\n\r", ea, vector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	printk("CPU #: %d\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	       "   PC: %08lx    SR: %08lx    SP: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	       0, regs->pc, regs->sr, regs->sp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	printk("GPR00: %08lx GPR01: %08lx GPR02: %08lx GPR03: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	       0L, regs->gpr[1], regs->gpr[2], regs->gpr[3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	printk("GPR04: %08lx GPR05: %08lx GPR06: %08lx GPR07: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	       regs->gpr[4], regs->gpr[5], regs->gpr[6], regs->gpr[7]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	printk("GPR08: %08lx GPR09: %08lx GPR10: %08lx GPR11: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	       regs->gpr[8], regs->gpr[9], regs->gpr[10], regs->gpr[11]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	printk("GPR12: %08lx GPR13: %08lx GPR14: %08lx GPR15: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	       regs->gpr[12], regs->gpr[13], regs->gpr[14], regs->gpr[15]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	printk("GPR16: %08lx GPR17: %08lx GPR18: %08lx GPR19: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	       regs->gpr[16], regs->gpr[17], regs->gpr[18], regs->gpr[19]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	printk("GPR20: %08lx GPR21: %08lx GPR22: %08lx GPR23: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	       regs->gpr[20], regs->gpr[21], regs->gpr[22], regs->gpr[23]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	printk("GPR24: %08lx GPR25: %08lx GPR26: %08lx GPR27: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	       regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	printk("GPR28: %08lx GPR29: %08lx GPR30: %08lx GPR31: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	       regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	printk("  RES: %08lx oGPR11: %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	       regs->gpr[11], regs->orig_gpr11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	printk("Process %s (pid: %d, stackpage=%08lx)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	       ((struct task_struct *)(__pa(current)))->comm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	       ((struct task_struct *)(__pa(current)))->pid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	       (unsigned long)current);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	printk("\nStack: ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	printk("Stack dump [0x%08lx]:\n", (unsigned long)stack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	for (i = 0; i < kstack_depth_to_print; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		if (((long)stack & (THREAD_SIZE - 1)) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		stack++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		printk("%lx :: sp + %02d: 0x%08lx\n", stack, i * 4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		       *((unsigned long *)(__pa(stack))));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	printk("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	printk("Call Trace:   ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	i = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	while (((long)stack & (THREAD_SIZE - 1)) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		addr = *((unsigned long *)__pa(stack));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		stack++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		if (kernel_text_address(addr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 			if (i && ((i % 6) == 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 				printk("\n ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 			printk(" [<%08lx>]", addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 			i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	printk("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	printk("\nCode: ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	for (i = -24; i < 24; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		unsigned char c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		c = ((unsigned char *)(__pa(regs->pc)))[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		if (i == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 			printk("(%02x) ", c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 			printk("%02x ", c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	printk("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) /* This is normally the 'Oops' routine */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) void die(const char *str, struct pt_regs *regs, long err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	console_verbose();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	printk("\n%s#: %04lx\n", str, err & 0xffff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	show_registers(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) #ifdef CONFIG_JUMP_UPON_UNHANDLED_EXCEPTION
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	printk("\n\nUNHANDLED_EXCEPTION: entering infinite loop\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	/* shut down interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	local_irq_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	__asm__ __volatile__("l.nop   1");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	do {} while (1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	do_exit(SIGSEGV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) /* This is normally the 'Oops' routine */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) void die_if_kernel(const char *str, struct pt_regs *regs, long err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	if (user_mode(regs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	die(str, regs, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) void unhandled_exception(struct pt_regs *regs, int ea, int vector)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	printk("Unable to handle exception at EA =0x%x, vector 0x%x",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	       ea, vector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	die("Oops", regs, 9);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) void __init trap_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	/* Nothing needs to be done */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) asmlinkage void do_trap(struct pt_regs *regs, unsigned long address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	force_sig_fault(SIGTRAP, TRAP_TRACE, (void __user *)address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	regs->pc += 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) asmlinkage void do_unaligned_access(struct pt_regs *regs, unsigned long address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	if (user_mode(regs)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		/* Send a SIGBUS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *)address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		printk("KERNEL: Unaligned Access 0x%.8lx\n", address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		show_registers(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		die("Die:", regs, address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) asmlinkage void do_bus_fault(struct pt_regs *regs, unsigned long address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	if (user_mode(regs)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 		/* Send a SIGBUS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		force_sig_fault(SIGBUS, BUS_ADRERR, (void __user *)address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	} else {		/* Kernel mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		printk("KERNEL: Bus error (SIGBUS) 0x%.8lx\n", address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		show_registers(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		die("Die:", regs, address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) static inline int in_delay_slot(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) #ifdef CONFIG_OPENRISC_NO_SPR_SR_DSX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	/* No delay slot flag, do the old way */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	unsigned int op, insn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	insn = *((unsigned int *)regs->pc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	op = insn >> 26;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	switch (op) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	case 0x00: /* l.j */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	case 0x01: /* l.jal */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	case 0x03: /* l.bnf */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	case 0x04: /* l.bf */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	case 0x11: /* l.jr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	case 0x12: /* l.jalr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	return mfspr(SPR_SR) & SPR_SR_DSX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) static inline void adjust_pc(struct pt_regs *regs, unsigned long address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	int displacement;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	unsigned int rb, op, jmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	if (unlikely(in_delay_slot(regs))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		/* In delay slot, instruction at pc is a branch, simulate it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		jmp = *((unsigned int *)regs->pc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		displacement = sign_extend32(((jmp) & 0x3ffffff) << 2, 27);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 		rb = (jmp & 0x0000ffff) >> 11;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		op = jmp >> 26;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 		switch (op) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 		case 0x00: /* l.j */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 			regs->pc += displacement;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 			return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 		case 0x01: /* l.jal */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 			regs->pc += displacement;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 			regs->gpr[9] = regs->pc + 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 			return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 		case 0x03: /* l.bnf */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 			if (regs->sr & SPR_SR_F)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 				regs->pc += 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 			else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 				regs->pc += displacement;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 			return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 		case 0x04: /* l.bf */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 			if (regs->sr & SPR_SR_F)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 				regs->pc += displacement;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 			else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 				regs->pc += 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 			return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 		case 0x11: /* l.jr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 			regs->pc = regs->gpr[rb];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 			return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 		case 0x12: /* l.jalr */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 			regs->pc = regs->gpr[rb];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 			regs->gpr[9] = regs->pc + 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 			return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 		default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 		regs->pc += 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) static inline void simulate_lwa(struct pt_regs *regs, unsigned long address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 				unsigned int insn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	unsigned int ra, rd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	unsigned long value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	unsigned long orig_pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	long imm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	const struct exception_table_entry *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	orig_pc = regs->pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	adjust_pc(regs, address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	ra = (insn >> 16) & 0x1f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	rd = (insn >> 21) & 0x1f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	imm = (short)insn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	lwa_addr = (unsigned long __user *)(regs->gpr[ra] + imm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	if ((unsigned long)lwa_addr & 0x3) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 		do_unaligned_access(regs, address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 	if (get_user(value, lwa_addr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 		if (user_mode(regs)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 			force_sig(SIGSEGV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 			return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 		if ((entry = search_exception_tables(orig_pc))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 			regs->pc = entry->fixup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 			return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 		/* kernel access in kernel space, load it directly */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 		value = *((unsigned long *)lwa_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 	lwa_flag = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 	regs->gpr[rd] = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) static inline void simulate_swa(struct pt_regs *regs, unsigned long address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 				unsigned int insn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 	unsigned long __user *vaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 	unsigned long orig_pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 	unsigned int ra, rb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 	long imm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 	const struct exception_table_entry *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 	orig_pc = regs->pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 	adjust_pc(regs, address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 	ra = (insn >> 16) & 0x1f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 	rb = (insn >> 11) & 0x1f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 	imm = (short)(((insn & 0x2200000) >> 10) | (insn & 0x7ff));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 	vaddr = (unsigned long __user *)(regs->gpr[ra] + imm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 	if (!lwa_flag || vaddr != lwa_addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 		regs->sr &= ~SPR_SR_F;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 	if ((unsigned long)vaddr & 0x3) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 		do_unaligned_access(regs, address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 	if (put_user(regs->gpr[rb], vaddr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 		if (user_mode(regs)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 			force_sig(SIGSEGV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 			return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 		if ((entry = search_exception_tables(orig_pc))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 			regs->pc = entry->fixup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 			return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 		/* kernel access in kernel space, store it directly */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 		*((unsigned long *)vaddr) = regs->gpr[rb];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 	lwa_flag = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 	regs->sr |= SPR_SR_F;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) #define INSN_LWA	0x1b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) #define INSN_SWA	0x33
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) asmlinkage void do_illegal_instruction(struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 				       unsigned long address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) 	unsigned int op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 	unsigned int insn = *((unsigned int *)address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 	op = insn >> 26;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 	switch (op) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 	case INSN_LWA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 		simulate_lwa(regs, address, insn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 	case INSN_SWA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 		simulate_swa(regs, address, insn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) 	if (user_mode(regs)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 		/* Send a SIGILL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) 		force_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) 	} else {		/* Kernel mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) 		printk("KERNEL: Illegal instruction (SIGILL) 0x%.8lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) 		       address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 		show_registers(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 		die("Die:", regs, address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) }