2 * Copyright (C) 1994 - 1999, 2000, 01, 06 Ralf Baechle
3 * Copyright (C) 1995, 1996 Paul M. Antoine
4 * Copyright (C) 1998 Ulf Carlsson
5 * Copyright (C) 1999 Silicon Graphics, Inc.
6 * Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
7 * Copyright (C) 2002, 2003, 2004, 2005, 2007 Maciej W. Rozycki
8 * Copyright (C) 2000, 2001, 2012 MIPS Technologies, Inc. All rights reserved.
9 * Copyright (C) 2014, Imagination Technologies Ltd.
11 * SPDX-License-Identifier: GPL-2.0+
15 #include <asm/mipsregs.h>
16 #include <asm/addrspace.h>
17 #include <asm/system.h>
19 DECLARE_GLOBAL_DATA_PTR;
21 static void show_regs(const struct pt_regs *regs)
23 const int field = 2 * sizeof(unsigned long);
24 unsigned int cause = regs->cp0_cause;
29 * Saved main processor registers
31 for (i = 0; i < 32; ) {
35 printf(" %0*lx", field, 0UL);
36 else if (i == 26 || i == 27)
37 printf(" %*s", field, "");
39 printf(" %0*lx", field, regs->regs[i]);
46 printf("Hi : %0*lx\n", field, regs->hi);
47 printf("Lo : %0*lx\n", field, regs->lo);
52 printf("epc : %0*lx (text %0*lx)\n", field, regs->cp0_epc,
53 field, regs->cp0_epc - gd->reloc_off);
54 printf("ra : %0*lx (text %0*lx)\n", field, regs->regs[31],
55 field, regs->regs[31] - gd->reloc_off);
57 printf("Status: %08x\n", (uint32_t) regs->cp0_status);
59 exccode = (cause & CAUSEF_EXCCODE) >> CAUSEB_EXCCODE;
60 printf("Cause : %08x (ExcCode %02x)\n", cause, exccode);
62 if (1 <= exccode && exccode <= 5)
63 printf("BadVA : %0*lx\n", field, regs->cp0_badvaddr);
65 printf("PrId : %08x\n", read_c0_prid());
68 void do_reserved(const struct pt_regs *regs)
75 void do_ejtag_debug(const struct pt_regs *regs)
77 const int field = 2 * sizeof(unsigned long);
81 depc = read_c0_depc();
82 debug = read_c0_debug();
84 printf("SDBBP EJTAG debug exception: c0_depc = %0*lx, DEBUG = %08x\n",
88 static void set_handler(unsigned long offset, void *addr, unsigned long size)
90 unsigned long ebase = gd->irq_sp;
92 memcpy((void *)(ebase + offset), addr, size);
93 flush_cache(ebase + offset, size);
96 void trap_init(ulong reloc_addr)
98 unsigned long ebase = gd->irq_sp;
100 set_handler(0x180, &except_vec3_generic, 0x80);
101 set_handler(0x280, &except_vec_ejtag_debug, 0x80);
103 write_c0_ebase(ebase);
104 clear_c0_status(ST0_BEV);
105 execution_hazard_barrier();