David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 1 | /* MN10300 Misalignment fixup handler |
| 2 | * |
| 3 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. |
| 4 | * Written by David Howells (dhowells@redhat.com) |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public Licence |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the Licence, or (at your option) any later version. |
| 10 | */ |
| 11 | #include <linux/module.h> |
| 12 | #include <linux/sched.h> |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/string.h> |
| 15 | #include <linux/errno.h> |
| 16 | #include <linux/ptrace.h> |
| 17 | #include <linux/timer.h> |
| 18 | #include <linux/mm.h> |
| 19 | #include <linux/smp.h> |
| 20 | #include <linux/smp_lock.h> |
| 21 | #include <linux/init.h> |
| 22 | #include <linux/delay.h> |
| 23 | #include <linux/spinlock.h> |
| 24 | #include <linux/interrupt.h> |
| 25 | #include <linux/pci.h> |
| 26 | #include <asm/processor.h> |
| 27 | #include <asm/system.h> |
| 28 | #include <asm/uaccess.h> |
| 29 | #include <asm/io.h> |
| 30 | #include <asm/atomic.h> |
| 31 | #include <asm/smp.h> |
| 32 | #include <asm/pgalloc.h> |
| 33 | #include <asm/cpu-regs.h> |
| 34 | #include <asm/busctl-regs.h> |
| 35 | #include <asm/fpu.h> |
| 36 | #include <asm/gdb-stub.h> |
| 37 | #include <asm/asm-offsets.h> |
| 38 | |
| 39 | #if 0 |
David Howells | 31ea24b | 2008-11-12 15:34:59 +0000 | [diff] [blame] | 40 | #define kdebug(FMT, ...) printk(KERN_DEBUG "MISALIGN: "FMT"\n", ##__VA_ARGS__) |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 41 | #else |
| 42 | #define kdebug(FMT, ...) do {} while (0) |
| 43 | #endif |
| 44 | |
David Howells | d3bd462 | 2008-11-12 15:35:45 +0000 | [diff] [blame] | 45 | static int misalignment_addr(unsigned long *registers, unsigned long sp, |
| 46 | unsigned params, unsigned opcode, |
| 47 | unsigned long disp, |
David Howells | 6d615c7 | 2008-11-12 15:35:35 +0000 | [diff] [blame] | 48 | void **_address, unsigned long **_postinc, |
| 49 | unsigned long *_inc); |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 50 | |
| 51 | static int misalignment_reg(unsigned long *registers, unsigned params, |
David Howells | b308bf3 | 2008-11-12 15:35:14 +0000 | [diff] [blame] | 52 | unsigned opcode, unsigned long disp, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 53 | unsigned long **_register); |
| 54 | |
David Howells | ddb6d05 | 2008-11-12 15:35:30 +0000 | [diff] [blame] | 55 | static void misalignment_MOV_Lcc(struct pt_regs *regs, uint32_t opcode); |
| 56 | |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 57 | static const unsigned Dreg_index[] = { |
| 58 | REG_D0 >> 2, REG_D1 >> 2, REG_D2 >> 2, REG_D3 >> 2 |
| 59 | }; |
| 60 | |
| 61 | static const unsigned Areg_index[] = { |
| 62 | REG_A0 >> 2, REG_A1 >> 2, REG_A2 >> 2, REG_A3 >> 2 |
| 63 | }; |
| 64 | |
| 65 | static const unsigned Rreg_index[] = { |
| 66 | REG_E0 >> 2, REG_E1 >> 2, REG_E2 >> 2, REG_E3 >> 2, |
| 67 | REG_E4 >> 2, REG_E5 >> 2, REG_E6 >> 2, REG_E7 >> 2, |
| 68 | REG_A0 >> 2, REG_A1 >> 2, REG_A2 >> 2, REG_A3 >> 2, |
| 69 | REG_D0 >> 2, REG_D1 >> 2, REG_D2 >> 2, REG_D3 >> 2 |
| 70 | }; |
| 71 | |
| 72 | enum format_id { |
| 73 | FMT_S0, |
| 74 | FMT_S1, |
| 75 | FMT_S2, |
| 76 | FMT_S4, |
| 77 | FMT_D0, |
| 78 | FMT_D1, |
| 79 | FMT_D2, |
| 80 | FMT_D4, |
| 81 | FMT_D6, |
| 82 | FMT_D7, |
| 83 | FMT_D8, |
| 84 | FMT_D9, |
David Howells | ddb6d05 | 2008-11-12 15:35:30 +0000 | [diff] [blame] | 85 | FMT_D10, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 86 | }; |
| 87 | |
David Howells | 31ea24b | 2008-11-12 15:34:59 +0000 | [diff] [blame] | 88 | static const struct { |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 89 | u_int8_t opsz, dispsz; |
| 90 | } format_tbl[16] = { |
| 91 | [FMT_S0] = { 8, 0 }, |
| 92 | [FMT_S1] = { 8, 8 }, |
| 93 | [FMT_S2] = { 8, 16 }, |
| 94 | [FMT_S4] = { 8, 32 }, |
| 95 | [FMT_D0] = { 16, 0 }, |
| 96 | [FMT_D1] = { 16, 8 }, |
| 97 | [FMT_D2] = { 16, 16 }, |
| 98 | [FMT_D4] = { 16, 32 }, |
| 99 | [FMT_D6] = { 24, 0 }, |
| 100 | [FMT_D7] = { 24, 8 }, |
| 101 | [FMT_D8] = { 24, 24 }, |
| 102 | [FMT_D9] = { 24, 32 }, |
David Howells | ddb6d05 | 2008-11-12 15:35:30 +0000 | [diff] [blame] | 103 | [FMT_D10] = { 32, 0 }, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 104 | }; |
| 105 | |
| 106 | enum value_id { |
| 107 | DM0, /* data reg in opcode in bits 0-1 */ |
| 108 | DM1, /* data reg in opcode in bits 2-3 */ |
| 109 | DM2, /* data reg in opcode in bits 4-5 */ |
| 110 | AM0, /* addr reg in opcode in bits 0-1 */ |
| 111 | AM1, /* addr reg in opcode in bits 2-3 */ |
| 112 | AM2, /* addr reg in opcode in bits 4-5 */ |
| 113 | RM0, /* reg in opcode in bits 0-3 */ |
| 114 | RM1, /* reg in opcode in bits 2-5 */ |
| 115 | RM2, /* reg in opcode in bits 4-7 */ |
| 116 | RM4, /* reg in opcode in bits 8-11 */ |
| 117 | RM6, /* reg in opcode in bits 12-15 */ |
| 118 | |
| 119 | RD0, /* reg in displacement in bits 0-3 */ |
| 120 | RD2, /* reg in displacement in bits 4-7 */ |
| 121 | |
| 122 | SP, /* stack pointer */ |
| 123 | |
| 124 | SD8, /* 8-bit signed displacement */ |
| 125 | SD16, /* 16-bit signed displacement */ |
| 126 | SD24, /* 24-bit signed displacement */ |
| 127 | SIMM4_2, /* 4-bit signed displacement in opcode bits 4-7 */ |
| 128 | SIMM8, /* 8-bit signed immediate */ |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 129 | IMM8, /* 8-bit unsigned immediate */ |
| 130 | IMM16, /* 16-bit unsigned immediate */ |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 131 | IMM24, /* 24-bit unsigned immediate */ |
| 132 | IMM32, /* 32-bit unsigned immediate */ |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 133 | IMM32_HIGH8, /* 32-bit unsigned immediate, LSB in opcode */ |
| 134 | |
| 135 | IMM32_MEM, /* 32-bit unsigned displacement */ |
| 136 | IMM32_HIGH8_MEM, /* 32-bit unsigned displacement, LSB in opcode */ |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 137 | |
| 138 | DN0 = DM0, |
| 139 | DN1 = DM1, |
| 140 | DN2 = DM2, |
| 141 | AN0 = AM0, |
| 142 | AN1 = AM1, |
| 143 | AN2 = AM2, |
| 144 | RN0 = RM0, |
| 145 | RN1 = RM1, |
| 146 | RN2 = RM2, |
| 147 | RN4 = RM4, |
| 148 | RN6 = RM6, |
| 149 | DI = DM1, |
| 150 | RI = RM2, |
| 151 | |
| 152 | }; |
| 153 | |
| 154 | struct mn10300_opcode { |
David Howells | 6d615c7 | 2008-11-12 15:35:35 +0000 | [diff] [blame] | 155 | const char name[8]; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 156 | u_int32_t opcode; |
| 157 | u_int32_t opmask; |
| 158 | unsigned exclusion; |
| 159 | |
| 160 | enum format_id format; |
| 161 | |
| 162 | unsigned cpu_mask; |
| 163 | #define AM33 330 |
| 164 | |
| 165 | unsigned params[2]; |
| 166 | #define MEM(ADDR) (0x80000000 | (ADDR)) |
| 167 | #define MEM2(ADDR1, ADDR2) (0x80000000 | (ADDR1) << 8 | (ADDR2)) |
| 168 | #define MEMINC(ADDR) (0x81000000 | (ADDR)) |
| 169 | #define MEMINC2(ADDR, INC) (0x81000000 | (ADDR) << 8 | (INC)) |
| 170 | }; |
| 171 | |
| 172 | /* LIBOPCODES EXCERPT |
| 173 | Assemble Matsushita MN10300 instructions. |
| 174 | Copyright 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc. |
| 175 | |
| 176 | This program is free software; you can redistribute it and/or modify |
| 177 | it under the terms of the GNU General Public Licence as published by |
| 178 | the Free Software Foundation; either version 2 of the Licence, or |
| 179 | (at your option) any later version. |
| 180 | |
| 181 | This program is distributed in the hope that it will be useful, |
| 182 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 183 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 184 | GNU General Public Licence for more details. |
| 185 | |
| 186 | You should have received a copy of the GNU General Public Licence |
| 187 | along with this program; if not, write to the Free Software |
| 188 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 189 | */ |
| 190 | static const struct mn10300_opcode mn10300_opcodes[] = { |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 191 | { "mov", 0x4200, 0xf300, 0, FMT_S1, 0, {DM1, MEM2(IMM8, SP)}}, |
| 192 | { "mov", 0x4300, 0xf300, 0, FMT_S1, 0, {AM1, MEM2(IMM8, SP)}}, |
| 193 | { "mov", 0x5800, 0xfc00, 0, FMT_S1, 0, {MEM2(IMM8, SP), DN0}}, |
| 194 | { "mov", 0x5c00, 0xfc00, 0, FMT_S1, 0, {MEM2(IMM8, SP), AN0}}, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 195 | { "mov", 0x60, 0xf0, 0, FMT_S0, 0, {DM1, MEM(AN0)}}, |
| 196 | { "mov", 0x70, 0xf0, 0, FMT_S0, 0, {MEM(AM0), DN1}}, |
| 197 | { "mov", 0xf000, 0xfff0, 0, FMT_D0, 0, {MEM(AM0), AN1}}, |
| 198 | { "mov", 0xf010, 0xfff0, 0, FMT_D0, 0, {AM1, MEM(AN0)}}, |
| 199 | { "mov", 0xf300, 0xffc0, 0, FMT_D0, 0, {MEM2(DI, AM0), DN2}}, |
| 200 | { "mov", 0xf340, 0xffc0, 0, FMT_D0, 0, {DM2, MEM2(DI, AN0)}}, |
| 201 | { "mov", 0xf380, 0xffc0, 0, FMT_D0, 0, {MEM2(DI, AM0), AN2}}, |
| 202 | { "mov", 0xf3c0, 0xffc0, 0, FMT_D0, 0, {AM2, MEM2(DI, AN0)}}, |
| 203 | { "mov", 0xf80000, 0xfff000, 0, FMT_D1, 0, {MEM2(SD8, AM0), DN1}}, |
| 204 | { "mov", 0xf81000, 0xfff000, 0, FMT_D1, 0, {DM1, MEM2(SD8, AN0)}}, |
| 205 | { "mov", 0xf82000, 0xfff000, 0, FMT_D1, 0, {MEM2(SD8,AM0), AN1}}, |
| 206 | { "mov", 0xf83000, 0xfff000, 0, FMT_D1, 0, {AM1, MEM2(SD8, AN0)}}, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 207 | { "mov", 0xf90a00, 0xffff00, 0, FMT_D6, AM33, {MEM(RM0), RN2}}, |
| 208 | { "mov", 0xf91a00, 0xffff00, 0, FMT_D6, AM33, {RM2, MEM(RN0)}}, |
| 209 | { "mov", 0xf96a00, 0xffff00, 0x12, FMT_D6, AM33, {MEMINC(RM0), RN2}}, |
| 210 | { "mov", 0xf97a00, 0xffff00, 0, FMT_D6, AM33, {RM2, MEMINC(RN0)}}, |
| 211 | { "mov", 0xfa000000, 0xfff00000, 0, FMT_D2, 0, {MEM2(SD16, AM0), DN1}}, |
| 212 | { "mov", 0xfa100000, 0xfff00000, 0, FMT_D2, 0, {DM1, MEM2(SD16, AN0)}}, |
| 213 | { "mov", 0xfa200000, 0xfff00000, 0, FMT_D2, 0, {MEM2(SD16, AM0), AN1}}, |
| 214 | { "mov", 0xfa300000, 0xfff00000, 0, FMT_D2, 0, {AM1, MEM2(SD16, AN0)}}, |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 215 | { "mov", 0xfa900000, 0xfff30000, 0, FMT_D2, 0, {AM1, MEM2(IMM16, SP)}}, |
| 216 | { "mov", 0xfa910000, 0xfff30000, 0, FMT_D2, 0, {DM1, MEM2(IMM16, SP)}}, |
| 217 | { "mov", 0xfab00000, 0xfffc0000, 0, FMT_D2, 0, {MEM2(IMM16, SP), AN0}}, |
| 218 | { "mov", 0xfab40000, 0xfffc0000, 0, FMT_D2, 0, {MEM2(IMM16, SP), DN0}}, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 219 | { "mov", 0xfb0a0000, 0xffff0000, 0, FMT_D7, AM33, {MEM2(SD8, RM0), RN2}}, |
| 220 | { "mov", 0xfb1a0000, 0xffff0000, 0, FMT_D7, AM33, {RM2, MEM2(SD8, RN0)}}, |
| 221 | { "mov", 0xfb6a0000, 0xffff0000, 0x22, FMT_D7, AM33, {MEMINC2 (RM0, SIMM8), RN2}}, |
| 222 | { "mov", 0xfb7a0000, 0xffff0000, 0, FMT_D7, AM33, {RM2, MEMINC2 (RN0, SIMM8)}}, |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 223 | { "mov", 0xfb8a0000, 0xffff0f00, 0, FMT_D7, AM33, {MEM2(IMM8, SP), RN2}}, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 224 | { "mov", 0xfb8e0000, 0xffff000f, 0, FMT_D7, AM33, {MEM2(RI, RM0), RD2}}, |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 225 | { "mov", 0xfb9a0000, 0xffff0f00, 0, FMT_D7, AM33, {RM2, MEM2(IMM8, SP)}}, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 226 | { "mov", 0xfb9e0000, 0xffff000f, 0, FMT_D7, AM33, {RD2, MEM2(RI, RN0)}}, |
| 227 | { "mov", 0xfc000000, 0xfff00000, 0, FMT_D4, 0, {MEM2(IMM32,AM0), DN1}}, |
| 228 | { "mov", 0xfc100000, 0xfff00000, 0, FMT_D4, 0, {DM1, MEM2(IMM32,AN0)}}, |
| 229 | { "mov", 0xfc200000, 0xfff00000, 0, FMT_D4, 0, {MEM2(IMM32,AM0), AN1}}, |
| 230 | { "mov", 0xfc300000, 0xfff00000, 0, FMT_D4, 0, {AM1, MEM2(IMM32,AN0)}}, |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 231 | { "mov", 0xfc800000, 0xfff30000, 0, FMT_D4, 0, {AM1, MEM(IMM32_MEM)}}, |
| 232 | { "mov", 0xfc810000, 0xfff30000, 0, FMT_D4, 0, {DM1, MEM(IMM32_MEM)}}, |
| 233 | { "mov", 0xfc900000, 0xfff30000, 0, FMT_D4, 0, {AM1, MEM2(IMM32, SP)}}, |
| 234 | { "mov", 0xfc910000, 0xfff30000, 0, FMT_D4, 0, {DM1, MEM2(IMM32, SP)}}, |
| 235 | { "mov", 0xfca00000, 0xfffc0000, 0, FMT_D4, 0, {MEM(IMM32_MEM), AN0}}, |
| 236 | { "mov", 0xfca40000, 0xfffc0000, 0, FMT_D4, 0, {MEM(IMM32_MEM), DN0}}, |
| 237 | { "mov", 0xfcb00000, 0xfffc0000, 0, FMT_D4, 0, {MEM2(IMM32, SP), AN0}}, |
| 238 | { "mov", 0xfcb40000, 0xfffc0000, 0, FMT_D4, 0, {MEM2(IMM32, SP), DN0}}, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 239 | { "mov", 0xfd0a0000, 0xffff0000, 0, FMT_D8, AM33, {MEM2(SD24, RM0), RN2}}, |
| 240 | { "mov", 0xfd1a0000, 0xffff0000, 0, FMT_D8, AM33, {RM2, MEM2(SD24, RN0)}}, |
| 241 | { "mov", 0xfd6a0000, 0xffff0000, 0x22, FMT_D8, AM33, {MEMINC2 (RM0, IMM24), RN2}}, |
| 242 | { "mov", 0xfd7a0000, 0xffff0000, 0, FMT_D8, AM33, {RM2, MEMINC2 (RN0, IMM24)}}, |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 243 | { "mov", 0xfd8a0000, 0xffff0f00, 0, FMT_D8, AM33, {MEM2(IMM24, SP), RN2}}, |
| 244 | { "mov", 0xfd9a0000, 0xffff0f00, 0, FMT_D8, AM33, {RM2, MEM2(IMM24, SP)}}, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 245 | { "mov", 0xfe0a0000, 0xffff0000, 0, FMT_D9, AM33, {MEM2(IMM32_HIGH8,RM0), RN2}}, |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 246 | { "mov", 0xfe0a0000, 0xffff0000, 0, FMT_D9, AM33, {MEM2(IMM32_HIGH8,RM0), RN2}}, |
| 247 | { "mov", 0xfe0e0000, 0xffff0f00, 0, FMT_D9, AM33, {MEM(IMM32_HIGH8_MEM), RN2}}, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 248 | { "mov", 0xfe1a0000, 0xffff0000, 0, FMT_D9, AM33, {RM2, MEM2(IMM32_HIGH8, RN0)}}, |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 249 | { "mov", 0xfe1a0000, 0xffff0000, 0, FMT_D9, AM33, {RM2, MEM2(IMM32_HIGH8, RN0)}}, |
| 250 | { "mov", 0xfe1e0000, 0xffff0f00, 0, FMT_D9, AM33, {RM2, MEM(IMM32_HIGH8_MEM)}}, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 251 | { "mov", 0xfe6a0000, 0xffff0000, 0x22, FMT_D9, AM33, {MEMINC2 (RM0, IMM32_HIGH8), RN2}}, |
| 252 | { "mov", 0xfe7a0000, 0xffff0000, 0, FMT_D9, AM33, {RN2, MEMINC2 (RM0, IMM32_HIGH8)}}, |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 253 | { "mov", 0xfe8a0000, 0xffff0f00, 0, FMT_D9, AM33, {MEM2(IMM32_HIGH8, SP), RN2}}, |
| 254 | { "mov", 0xfe9a0000, 0xffff0f00, 0, FMT_D9, AM33, {RM2, MEM2(IMM32_HIGH8, SP)}}, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 255 | |
| 256 | { "movhu", 0xf060, 0xfff0, 0, FMT_D0, 0, {MEM(AM0), DN1}}, |
| 257 | { "movhu", 0xf070, 0xfff0, 0, FMT_D0, 0, {DM1, MEM(AN0)}}, |
| 258 | { "movhu", 0xf480, 0xffc0, 0, FMT_D0, 0, {MEM2(DI, AM0), DN2}}, |
| 259 | { "movhu", 0xf4c0, 0xffc0, 0, FMT_D0, 0, {DM2, MEM2(DI, AN0)}}, |
| 260 | { "movhu", 0xf86000, 0xfff000, 0, FMT_D1, 0, {MEM2(SD8, AM0), DN1}}, |
| 261 | { "movhu", 0xf87000, 0xfff000, 0, FMT_D1, 0, {DM1, MEM2(SD8, AN0)}}, |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 262 | { "movhu", 0xf89300, 0xfff300, 0, FMT_D1, 0, {DM1, MEM2(IMM8, SP)}}, |
| 263 | { "movhu", 0xf8bc00, 0xfffc00, 0, FMT_D1, 0, {MEM2(IMM8, SP), DN0}}, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 264 | { "movhu", 0xf94a00, 0xffff00, 0, FMT_D6, AM33, {MEM(RM0), RN2}}, |
| 265 | { "movhu", 0xf95a00, 0xffff00, 0, FMT_D6, AM33, {RM2, MEM(RN0)}}, |
| 266 | { "movhu", 0xf9ea00, 0xffff00, 0x12, FMT_D6, AM33, {MEMINC(RM0), RN2}}, |
| 267 | { "movhu", 0xf9fa00, 0xffff00, 0, FMT_D6, AM33, {RM2, MEMINC(RN0)}}, |
| 268 | { "movhu", 0xfa600000, 0xfff00000, 0, FMT_D2, 0, {MEM2(SD16, AM0), DN1}}, |
| 269 | { "movhu", 0xfa700000, 0xfff00000, 0, FMT_D2, 0, {DM1, MEM2(SD16, AN0)}}, |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 270 | { "movhu", 0xfa930000, 0xfff30000, 0, FMT_D2, 0, {DM1, MEM2(IMM16, SP)}}, |
| 271 | { "movhu", 0xfabc0000, 0xfffc0000, 0, FMT_D2, 0, {MEM2(IMM16, SP), DN0}}, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 272 | { "movhu", 0xfb4a0000, 0xffff0000, 0, FMT_D7, AM33, {MEM2(SD8, RM0), RN2}}, |
| 273 | { "movhu", 0xfb5a0000, 0xffff0000, 0, FMT_D7, AM33, {RM2, MEM2(SD8, RN0)}}, |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 274 | { "movhu", 0xfbca0000, 0xffff0f00, 0, FMT_D7, AM33, {MEM2(IMM8, SP), RN2}}, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 275 | { "movhu", 0xfbce0000, 0xffff000f, 0, FMT_D7, AM33, {MEM2(RI, RM0), RD2}}, |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 276 | { "movhu", 0xfbda0000, 0xffff0f00, 0, FMT_D7, AM33, {RM2, MEM2(IMM8, SP)}}, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 277 | { "movhu", 0xfbde0000, 0xffff000f, 0, FMT_D7, AM33, {RD2, MEM2(RI, RN0)}}, |
| 278 | { "movhu", 0xfbea0000, 0xffff0000, 0x22, FMT_D7, AM33, {MEMINC2 (RM0, SIMM8), RN2}}, |
| 279 | { "movhu", 0xfbfa0000, 0xffff0000, 0, FMT_D7, AM33, {RM2, MEMINC2 (RN0, SIMM8)}}, |
| 280 | { "movhu", 0xfc600000, 0xfff00000, 0, FMT_D4, 0, {MEM2(IMM32,AM0), DN1}}, |
| 281 | { "movhu", 0xfc700000, 0xfff00000, 0, FMT_D4, 0, {DM1, MEM2(IMM32,AN0)}}, |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 282 | { "movhu", 0xfc830000, 0xfff30000, 0, FMT_D4, 0, {DM1, MEM(IMM32_MEM)}}, |
| 283 | { "movhu", 0xfc930000, 0xfff30000, 0, FMT_D4, 0, {DM1, MEM2(IMM32, SP)}}, |
| 284 | { "movhu", 0xfcac0000, 0xfffc0000, 0, FMT_D4, 0, {MEM(IMM32_MEM), DN0}}, |
| 285 | { "movhu", 0xfcbc0000, 0xfffc0000, 0, FMT_D4, 0, {MEM2(IMM32, SP), DN0}}, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 286 | { "movhu", 0xfd4a0000, 0xffff0000, 0, FMT_D8, AM33, {MEM2(SD24, RM0), RN2}}, |
| 287 | { "movhu", 0xfd5a0000, 0xffff0000, 0, FMT_D8, AM33, {RM2, MEM2(SD24, RN0)}}, |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 288 | { "movhu", 0xfdca0000, 0xffff0f00, 0, FMT_D8, AM33, {MEM2(IMM24, SP), RN2}}, |
| 289 | { "movhu", 0xfdda0000, 0xffff0f00, 0, FMT_D8, AM33, {RM2, MEM2(IMM24, SP)}}, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 290 | { "movhu", 0xfdea0000, 0xffff0000, 0x22, FMT_D8, AM33, {MEMINC2 (RM0, IMM24), RN2}}, |
| 291 | { "movhu", 0xfdfa0000, 0xffff0000, 0, FMT_D8, AM33, {RM2, MEMINC2 (RN0, IMM24)}}, |
| 292 | { "movhu", 0xfe4a0000, 0xffff0000, 0, FMT_D9, AM33, {MEM2(IMM32_HIGH8,RM0), RN2}}, |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 293 | { "movhu", 0xfe4e0000, 0xffff0f00, 0, FMT_D9, AM33, {MEM(IMM32_HIGH8_MEM), RN2}}, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 294 | { "movhu", 0xfe5a0000, 0xffff0000, 0, FMT_D9, AM33, {RM2, MEM2(IMM32_HIGH8, RN0)}}, |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 295 | { "movhu", 0xfe5e0000, 0xffff0f00, 0, FMT_D9, AM33, {RM2, MEM(IMM32_HIGH8_MEM)}}, |
| 296 | { "movhu", 0xfeca0000, 0xffff0f00, 0, FMT_D9, AM33, {MEM2(IMM32_HIGH8, SP), RN2}}, |
| 297 | { "movhu", 0xfeda0000, 0xffff0f00, 0, FMT_D9, AM33, {RM2, MEM2(IMM32_HIGH8, SP)}}, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 298 | { "movhu", 0xfeea0000, 0xffff0000, 0x22, FMT_D9, AM33, {MEMINC2 (RM0, IMM32_HIGH8), RN2}}, |
| 299 | { "movhu", 0xfefa0000, 0xffff0000, 0, FMT_D9, AM33, {RN2, MEMINC2 (RM0, IMM32_HIGH8)}}, |
David Howells | ddb6d05 | 2008-11-12 15:35:30 +0000 | [diff] [blame] | 300 | |
| 301 | { "mov_llt", 0xf7e00000, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}}, |
| 302 | { "mov_lgt", 0xf7e00001, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}}, |
| 303 | { "mov_lge", 0xf7e00002, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}}, |
| 304 | { "mov_lle", 0xf7e00003, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}}, |
| 305 | { "mov_lcs", 0xf7e00004, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}}, |
| 306 | { "mov_lhi", 0xf7e00005, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}}, |
| 307 | { "mov_lcc", 0xf7e00006, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}}, |
| 308 | { "mov_lls", 0xf7e00007, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}}, |
| 309 | { "mov_leq", 0xf7e00008, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}}, |
| 310 | { "mov_lne", 0xf7e00009, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}}, |
| 311 | { "mov_lra", 0xf7e0000a, 0xffff000f, 0x22, FMT_D10, AM33, {MEMINC2 (RN4,SIMM4_2), RM6}}, |
| 312 | |
David Howells | 6d615c7 | 2008-11-12 15:35:35 +0000 | [diff] [blame] | 313 | { "", 0, 0, 0, 0, 0, {0}}, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 314 | }; |
| 315 | |
| 316 | /* |
| 317 | * fix up misalignment problems where possible |
| 318 | */ |
| 319 | asmlinkage void misalignment(struct pt_regs *regs, enum exception_code code) |
| 320 | { |
| 321 | const struct exception_table_entry *fixup; |
| 322 | const struct mn10300_opcode *pop; |
| 323 | unsigned long *registers = (unsigned long *) regs; |
David Howells | d3bd462 | 2008-11-12 15:35:45 +0000 | [diff] [blame] | 324 | unsigned long data, *store, *postinc, disp, inc, sp; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 325 | mm_segment_t seg; |
| 326 | siginfo_t info; |
David Howells | b308bf3 | 2008-11-12 15:35:14 +0000 | [diff] [blame] | 327 | uint32_t opcode, noc, xo, xm; |
David Howells | 6d615c7 | 2008-11-12 15:35:35 +0000 | [diff] [blame] | 328 | uint8_t *pc, byte, datasz; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 329 | void *address; |
David Howells | b308bf3 | 2008-11-12 15:35:14 +0000 | [diff] [blame] | 330 | unsigned tmp, npop, dispsz, loop; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 331 | |
David Howells | 58a4748 | 2008-11-12 15:35:55 +0000 | [diff] [blame] | 332 | /* we don't fix up userspace misalignment faults */ |
David Howells | d3bd462 | 2008-11-12 15:35:45 +0000 | [diff] [blame] | 333 | if (user_mode(regs)) |
David Howells | 58a4748 | 2008-11-12 15:35:55 +0000 | [diff] [blame] | 334 | goto bus_error; |
| 335 | |
| 336 | sp = (unsigned long) regs + sizeof(*regs); |
David Howells | d3bd462 | 2008-11-12 15:35:45 +0000 | [diff] [blame] | 337 | |
| 338 | kdebug("==>misalignment({pc=%lx,sp=%lx})", regs->pc, sp); |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 339 | |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 340 | if (regs->epsw & EPSW_IE) |
| 341 | asm volatile("or %0,epsw" : : "i"(EPSW_IE)); |
| 342 | |
| 343 | seg = get_fs(); |
| 344 | set_fs(KERNEL_DS); |
| 345 | |
| 346 | fixup = search_exception_tables(regs->pc); |
| 347 | |
| 348 | /* first thing to do is to match the opcode */ |
| 349 | pc = (u_int8_t *) regs->pc; |
| 350 | |
| 351 | if (__get_user(byte, pc) != 0) |
| 352 | goto fetch_error; |
| 353 | opcode = byte; |
| 354 | noc = 8; |
| 355 | |
David Howells | 6d615c7 | 2008-11-12 15:35:35 +0000 | [diff] [blame] | 356 | for (pop = mn10300_opcodes; pop->name[0]; pop++) { |
David Howells | 31ea24b | 2008-11-12 15:34:59 +0000 | [diff] [blame] | 357 | npop = ilog2(pop->opcode | pop->opmask); |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 358 | if (npop <= 0 || npop > 31) |
| 359 | continue; |
| 360 | npop = (npop + 8) & ~7; |
| 361 | |
| 362 | got_more_bits: |
| 363 | if (npop == noc) { |
| 364 | if ((opcode & pop->opmask) == pop->opcode) |
| 365 | goto found_opcode; |
| 366 | } else if (npop > noc) { |
| 367 | xo = pop->opcode >> (npop - noc); |
| 368 | xm = pop->opmask >> (npop - noc); |
| 369 | |
| 370 | if ((opcode & xm) != xo) |
| 371 | continue; |
| 372 | |
| 373 | /* we've got a partial match (an exact match on the |
| 374 | * first N bytes), so we need to get some more data */ |
| 375 | pc++; |
| 376 | if (__get_user(byte, pc) != 0) |
| 377 | goto fetch_error; |
| 378 | opcode = opcode << 8 | byte; |
| 379 | noc += 8; |
| 380 | goto got_more_bits; |
| 381 | } else { |
| 382 | /* there's already been a partial match as long as the |
| 383 | * complete match we're now considering, so this one |
| 384 | * should't match */ |
| 385 | continue; |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | /* didn't manage to find a fixup */ |
David Howells | 58a4748 | 2008-11-12 15:35:55 +0000 | [diff] [blame] | 390 | printk(KERN_CRIT "MISALIGN: %lx: unsupported instruction %x\n", |
| 391 | regs->pc, opcode); |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 392 | |
| 393 | failed: |
| 394 | set_fs(seg); |
| 395 | if (die_if_no_fixup("misalignment error", regs, code)) |
| 396 | return; |
| 397 | |
David Howells | 58a4748 | 2008-11-12 15:35:55 +0000 | [diff] [blame] | 398 | bus_error: |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 399 | info.si_signo = SIGBUS; |
| 400 | info.si_errno = 0; |
| 401 | info.si_code = BUS_ADRALN; |
| 402 | info.si_addr = (void *) regs->pc; |
| 403 | force_sig_info(SIGBUS, &info, current); |
| 404 | return; |
| 405 | |
| 406 | /* error reading opcodes */ |
| 407 | fetch_error: |
David Howells | 58a4748 | 2008-11-12 15:35:55 +0000 | [diff] [blame] | 408 | printk(KERN_CRIT |
| 409 | "MISALIGN: %p: fault whilst reading instruction data\n", |
| 410 | pc); |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 411 | goto failed; |
| 412 | |
| 413 | bad_addr_mode: |
David Howells | 58a4748 | 2008-11-12 15:35:55 +0000 | [diff] [blame] | 414 | printk(KERN_CRIT |
| 415 | "MISALIGN: %lx: unsupported addressing mode %x\n", |
| 416 | regs->pc, opcode); |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 417 | goto failed; |
| 418 | |
| 419 | bad_reg_mode: |
David Howells | 58a4748 | 2008-11-12 15:35:55 +0000 | [diff] [blame] | 420 | printk(KERN_CRIT |
| 421 | "MISALIGN: %lx: unsupported register mode %x\n", |
| 422 | regs->pc, opcode); |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 423 | goto failed; |
| 424 | |
| 425 | unsupported_instruction: |
David Howells | 58a4748 | 2008-11-12 15:35:55 +0000 | [diff] [blame] | 426 | printk(KERN_CRIT |
| 427 | "MISALIGN: %lx: unsupported instruction %x (%s)\n", |
| 428 | regs->pc, opcode, pop->name); |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 429 | goto failed; |
| 430 | |
| 431 | transfer_failed: |
| 432 | set_fs(seg); |
| 433 | if (fixup) { |
| 434 | regs->pc = fixup->fixup; |
| 435 | return; |
| 436 | } |
| 437 | if (die_if_no_fixup("misalignment fixup", regs, code)) |
| 438 | return; |
| 439 | |
| 440 | info.si_signo = SIGSEGV; |
| 441 | info.si_errno = 0; |
| 442 | info.si_code = 0; |
| 443 | info.si_addr = (void *) regs->pc; |
| 444 | force_sig_info(SIGSEGV, &info, current); |
| 445 | return; |
| 446 | |
| 447 | /* we matched the opcode */ |
| 448 | found_opcode: |
David Howells | 31ea24b | 2008-11-12 15:34:59 +0000 | [diff] [blame] | 449 | kdebug("%lx: %x==%x { %x, %x }", |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 450 | regs->pc, opcode, pop->opcode, pop->params[0], pop->params[1]); |
| 451 | |
| 452 | tmp = format_tbl[pop->format].opsz; |
| 453 | if (tmp > noc) |
| 454 | BUG(); /* match was less complete than it ought to have been */ |
| 455 | |
| 456 | if (tmp < noc) { |
| 457 | tmp = noc - tmp; |
| 458 | opcode >>= tmp; |
| 459 | pc -= tmp >> 3; |
| 460 | } |
| 461 | |
| 462 | /* grab the extra displacement (note it's LSB first) */ |
| 463 | disp = 0; |
David Howells | b308bf3 | 2008-11-12 15:35:14 +0000 | [diff] [blame] | 464 | dispsz = format_tbl[pop->format].dispsz; |
| 465 | for (loop = 0; loop < dispsz; loop += 8) { |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 466 | pc++; |
| 467 | if (__get_user(byte, pc) != 0) |
| 468 | goto fetch_error; |
David Howells | b308bf3 | 2008-11-12 15:35:14 +0000 | [diff] [blame] | 469 | disp |= byte << loop; |
| 470 | kdebug("{%p} disp[%02x]=%02x", pc, loop, byte); |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 471 | } |
| 472 | |
David Howells | b308bf3 | 2008-11-12 15:35:14 +0000 | [diff] [blame] | 473 | kdebug("disp=%lx", disp); |
| 474 | |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 475 | set_fs(KERNEL_XDS); |
David Howells | 58a4748 | 2008-11-12 15:35:55 +0000 | [diff] [blame] | 476 | if (fixup) |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 477 | set_fs(seg); |
| 478 | |
| 479 | tmp = (pop->params[0] ^ pop->params[1]) & 0x80000000; |
| 480 | if (!tmp) { |
David Howells | 58a4748 | 2008-11-12 15:35:55 +0000 | [diff] [blame] | 481 | printk(KERN_CRIT |
| 482 | "MISALIGN: %lx: insn not move to/from memory %x\n", |
| 483 | regs->pc, opcode); |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 484 | goto failed; |
| 485 | } |
| 486 | |
David Howells | 6d615c7 | 2008-11-12 15:35:35 +0000 | [diff] [blame] | 487 | /* determine the data transfer size of the move */ |
| 488 | if (pop->name[3] == 0 || /* "mov" */ |
| 489 | pop->name[4] == 'l') /* mov_lcc */ |
| 490 | inc = datasz = 4; |
| 491 | else if (pop->name[3] == 'h') /* movhu */ |
| 492 | inc = datasz = 2; |
| 493 | else |
| 494 | goto unsupported_instruction; |
| 495 | |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 496 | if (pop->params[0] & 0x80000000) { |
| 497 | /* move memory to register */ |
David Howells | d3bd462 | 2008-11-12 15:35:45 +0000 | [diff] [blame] | 498 | if (!misalignment_addr(registers, sp, |
| 499 | pop->params[0], opcode, disp, |
David Howells | 6d615c7 | 2008-11-12 15:35:35 +0000 | [diff] [blame] | 500 | &address, &postinc, &inc)) |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 501 | goto bad_addr_mode; |
| 502 | |
| 503 | if (!misalignment_reg(registers, pop->params[1], opcode, disp, |
| 504 | &store)) |
| 505 | goto bad_reg_mode; |
| 506 | |
David Howells | 6d615c7 | 2008-11-12 15:35:35 +0000 | [diff] [blame] | 507 | kdebug("mov%u (%p),DARn", datasz, address); |
| 508 | if (copy_from_user(&data, (void *) address, datasz) != 0) |
| 509 | goto transfer_failed; |
| 510 | if (pop->params[0] & 0x1000000) { |
| 511 | kdebug("inc=%lx", inc); |
| 512 | *postinc += inc; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 513 | } |
| 514 | |
| 515 | *store = data; |
David Howells | ddb6d05 | 2008-11-12 15:35:30 +0000 | [diff] [blame] | 516 | kdebug("loaded %lx", data); |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 517 | } else { |
| 518 | /* move register to memory */ |
| 519 | if (!misalignment_reg(registers, pop->params[0], opcode, disp, |
| 520 | &store)) |
| 521 | goto bad_reg_mode; |
| 522 | |
David Howells | d3bd462 | 2008-11-12 15:35:45 +0000 | [diff] [blame] | 523 | if (!misalignment_addr(registers, sp, |
| 524 | pop->params[1], opcode, disp, |
David Howells | 6d615c7 | 2008-11-12 15:35:35 +0000 | [diff] [blame] | 525 | &address, &postinc, &inc)) |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 526 | goto bad_addr_mode; |
| 527 | |
| 528 | data = *store; |
| 529 | |
David Howells | 6d615c7 | 2008-11-12 15:35:35 +0000 | [diff] [blame] | 530 | kdebug("mov%u %lx,(%p)", datasz, data, address); |
| 531 | if (copy_to_user((void *) address, &data, datasz) != 0) |
| 532 | goto transfer_failed; |
| 533 | if (pop->params[1] & 0x1000000) |
| 534 | *postinc += inc; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 535 | } |
| 536 | |
| 537 | tmp = format_tbl[pop->format].opsz + format_tbl[pop->format].dispsz; |
| 538 | regs->pc += tmp >> 3; |
| 539 | |
David Howells | ddb6d05 | 2008-11-12 15:35:30 +0000 | [diff] [blame] | 540 | /* handle MOV_Lcc, which are currently the only FMT_D10 insns that |
| 541 | * access memory */ |
| 542 | if (pop->format == FMT_D10) |
| 543 | misalignment_MOV_Lcc(regs, opcode); |
| 544 | |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 545 | set_fs(seg); |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 546 | } |
| 547 | |
| 548 | /* |
| 549 | * determine the address that was being accessed |
| 550 | */ |
David Howells | d3bd462 | 2008-11-12 15:35:45 +0000 | [diff] [blame] | 551 | static int misalignment_addr(unsigned long *registers, unsigned long sp, |
| 552 | unsigned params, unsigned opcode, |
| 553 | unsigned long disp, |
David Howells | 6d615c7 | 2008-11-12 15:35:35 +0000 | [diff] [blame] | 554 | void **_address, unsigned long **_postinc, |
| 555 | unsigned long *_inc) |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 556 | { |
| 557 | unsigned long *postinc = NULL, address = 0, tmp; |
| 558 | |
David Howells | 6d615c7 | 2008-11-12 15:35:35 +0000 | [diff] [blame] | 559 | if (!(params & 0x1000000)) { |
| 560 | kdebug("noinc"); |
| 561 | *_inc = 0; |
| 562 | _inc = NULL; |
| 563 | } |
| 564 | |
David Howells | f911c68 | 2008-11-12 15:35:20 +0000 | [diff] [blame] | 565 | params &= 0x00ffffff; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 566 | |
| 567 | do { |
| 568 | switch (params & 0xff) { |
| 569 | case DM0: |
| 570 | postinc = ®isters[Dreg_index[opcode & 0x03]]; |
| 571 | address += *postinc; |
| 572 | break; |
| 573 | case DM1: |
David Howells | 852c15b | 2008-11-12 15:35:40 +0000 | [diff] [blame] | 574 | postinc = ®isters[Dreg_index[opcode >> 2 & 0x03]]; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 575 | address += *postinc; |
| 576 | break; |
| 577 | case DM2: |
David Howells | 852c15b | 2008-11-12 15:35:40 +0000 | [diff] [blame] | 578 | postinc = ®isters[Dreg_index[opcode >> 4 & 0x03]]; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 579 | address += *postinc; |
| 580 | break; |
| 581 | case AM0: |
| 582 | postinc = ®isters[Areg_index[opcode & 0x03]]; |
| 583 | address += *postinc; |
| 584 | break; |
| 585 | case AM1: |
David Howells | 852c15b | 2008-11-12 15:35:40 +0000 | [diff] [blame] | 586 | postinc = ®isters[Areg_index[opcode >> 2 & 0x03]]; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 587 | address += *postinc; |
| 588 | break; |
| 589 | case AM2: |
David Howells | 852c15b | 2008-11-12 15:35:40 +0000 | [diff] [blame] | 590 | postinc = ®isters[Areg_index[opcode >> 4 & 0x03]]; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 591 | address += *postinc; |
| 592 | break; |
| 593 | case RM0: |
| 594 | postinc = ®isters[Rreg_index[opcode & 0x0f]]; |
| 595 | address += *postinc; |
| 596 | break; |
| 597 | case RM1: |
| 598 | postinc = ®isters[Rreg_index[opcode >> 2 & 0x0f]]; |
| 599 | address += *postinc; |
| 600 | break; |
| 601 | case RM2: |
| 602 | postinc = ®isters[Rreg_index[opcode >> 4 & 0x0f]]; |
| 603 | address += *postinc; |
| 604 | break; |
| 605 | case RM4: |
| 606 | postinc = ®isters[Rreg_index[opcode >> 8 & 0x0f]]; |
| 607 | address += *postinc; |
| 608 | break; |
| 609 | case RM6: |
| 610 | postinc = ®isters[Rreg_index[opcode >> 12 & 0x0f]]; |
| 611 | address += *postinc; |
| 612 | break; |
| 613 | case RD0: |
| 614 | postinc = ®isters[Rreg_index[disp & 0x0f]]; |
| 615 | address += *postinc; |
| 616 | break; |
| 617 | case RD2: |
| 618 | postinc = ®isters[Rreg_index[disp >> 4 & 0x0f]]; |
| 619 | address += *postinc; |
| 620 | break; |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 621 | case SP: |
David Howells | d3bd462 | 2008-11-12 15:35:45 +0000 | [diff] [blame] | 622 | address += sp; |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 623 | break; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 624 | |
David Howells | 6d615c7 | 2008-11-12 15:35:35 +0000 | [diff] [blame] | 625 | /* displacements are either to be added to the address |
| 626 | * before use, or, in the case of post-inc addressing, |
| 627 | * to be added into the base register after use */ |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 628 | case SD8: |
| 629 | case SIMM8: |
David Howells | 6d615c7 | 2008-11-12 15:35:35 +0000 | [diff] [blame] | 630 | disp = (long) (int8_t) (disp & 0xff); |
| 631 | goto displace_or_inc; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 632 | case SD16: |
David Howells | 6d615c7 | 2008-11-12 15:35:35 +0000 | [diff] [blame] | 633 | disp = (long) (int16_t) (disp & 0xffff); |
| 634 | goto displace_or_inc; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 635 | case SD24: |
| 636 | tmp = disp << 8; |
| 637 | asm("asr 8,%0" : "=r"(tmp) : "0"(tmp)); |
David Howells | 6d615c7 | 2008-11-12 15:35:35 +0000 | [diff] [blame] | 638 | disp = (long) tmp; |
| 639 | goto displace_or_inc; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 640 | case SIMM4_2: |
| 641 | tmp = opcode >> 4 & 0x0f; |
| 642 | tmp <<= 28; |
| 643 | asm("asr 28,%0" : "=r"(tmp) : "0"(tmp)); |
David Howells | 6d615c7 | 2008-11-12 15:35:35 +0000 | [diff] [blame] | 644 | disp = (long) tmp; |
| 645 | goto displace_or_inc; |
David Howells | d3bd462 | 2008-11-12 15:35:45 +0000 | [diff] [blame] | 646 | case IMM8: |
| 647 | disp &= 0x000000ff; |
| 648 | goto displace_or_inc; |
| 649 | case IMM16: |
| 650 | disp &= 0x0000ffff; |
| 651 | goto displace_or_inc; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 652 | case IMM24: |
David Howells | 6d615c7 | 2008-11-12 15:35:35 +0000 | [diff] [blame] | 653 | disp &= 0x00ffffff; |
| 654 | goto displace_or_inc; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 655 | case IMM32: |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 656 | case IMM32_MEM: |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 657 | case IMM32_HIGH8: |
David Howells | ee6e740 | 2008-11-12 15:35:09 +0000 | [diff] [blame] | 658 | case IMM32_HIGH8_MEM: |
David Howells | 6d615c7 | 2008-11-12 15:35:35 +0000 | [diff] [blame] | 659 | displace_or_inc: |
| 660 | kdebug("%s %lx", _inc ? "incr" : "disp", disp); |
| 661 | if (!_inc) |
| 662 | address += disp; |
| 663 | else |
| 664 | *_inc = disp; |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 665 | break; |
| 666 | default: |
David Howells | f911c68 | 2008-11-12 15:35:20 +0000 | [diff] [blame] | 667 | BUG(); |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 668 | return 0; |
| 669 | } |
| 670 | } while ((params >>= 8)); |
| 671 | |
| 672 | *_address = (void *) address; |
| 673 | *_postinc = postinc; |
| 674 | return 1; |
| 675 | } |
| 676 | |
| 677 | /* |
| 678 | * determine the register that is acting as source/dest |
| 679 | */ |
| 680 | static int misalignment_reg(unsigned long *registers, unsigned params, |
David Howells | b308bf3 | 2008-11-12 15:35:14 +0000 | [diff] [blame] | 681 | unsigned opcode, unsigned long disp, |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 682 | unsigned long **_register) |
| 683 | { |
| 684 | params &= 0x7fffffff; |
| 685 | |
| 686 | if (params & 0xffffff00) |
| 687 | return 0; |
| 688 | |
| 689 | switch (params & 0xff) { |
| 690 | case DM0: |
| 691 | *_register = ®isters[Dreg_index[opcode & 0x03]]; |
| 692 | break; |
| 693 | case DM1: |
| 694 | *_register = ®isters[Dreg_index[opcode >> 2 & 0x03]]; |
| 695 | break; |
| 696 | case DM2: |
| 697 | *_register = ®isters[Dreg_index[opcode >> 4 & 0x03]]; |
| 698 | break; |
| 699 | case AM0: |
| 700 | *_register = ®isters[Areg_index[opcode & 0x03]]; |
| 701 | break; |
| 702 | case AM1: |
| 703 | *_register = ®isters[Areg_index[opcode >> 2 & 0x03]]; |
| 704 | break; |
| 705 | case AM2: |
| 706 | *_register = ®isters[Areg_index[opcode >> 4 & 0x03]]; |
| 707 | break; |
| 708 | case RM0: |
| 709 | *_register = ®isters[Rreg_index[opcode & 0x0f]]; |
| 710 | break; |
| 711 | case RM1: |
| 712 | *_register = ®isters[Rreg_index[opcode >> 2 & 0x0f]]; |
| 713 | break; |
| 714 | case RM2: |
| 715 | *_register = ®isters[Rreg_index[opcode >> 4 & 0x0f]]; |
| 716 | break; |
| 717 | case RM4: |
| 718 | *_register = ®isters[Rreg_index[opcode >> 8 & 0x0f]]; |
| 719 | break; |
| 720 | case RM6: |
| 721 | *_register = ®isters[Rreg_index[opcode >> 12 & 0x0f]]; |
| 722 | break; |
| 723 | case RD0: |
| 724 | *_register = ®isters[Rreg_index[disp & 0x0f]]; |
| 725 | break; |
| 726 | case RD2: |
| 727 | *_register = ®isters[Rreg_index[disp >> 4 & 0x0f]]; |
| 728 | break; |
| 729 | case SP: |
| 730 | *_register = ®isters[REG_SP >> 2]; |
| 731 | break; |
| 732 | |
| 733 | default: |
David Howells | f911c68 | 2008-11-12 15:35:20 +0000 | [diff] [blame] | 734 | BUG(); |
David Howells | b920de1 | 2008-02-08 04:19:31 -0800 | [diff] [blame] | 735 | return 0; |
| 736 | } |
| 737 | |
| 738 | return 1; |
| 739 | } |
David Howells | 9f55588 | 2008-11-12 15:35:04 +0000 | [diff] [blame] | 740 | |
| 741 | /* |
David Howells | ddb6d05 | 2008-11-12 15:35:30 +0000 | [diff] [blame] | 742 | * handle the conditional loop part of the move-and-loop instructions |
| 743 | */ |
| 744 | static void misalignment_MOV_Lcc(struct pt_regs *regs, uint32_t opcode) |
| 745 | { |
| 746 | unsigned long epsw = regs->epsw; |
| 747 | unsigned long NxorV; |
| 748 | |
| 749 | kdebug("MOV_Lcc %x [flags=%lx]", opcode, epsw & 0xf); |
| 750 | |
| 751 | /* calculate N^V and shift onto the same bit position as Z */ |
| 752 | NxorV = ((epsw >> 3) ^ epsw >> 1) & 1; |
| 753 | |
| 754 | switch (opcode & 0xf) { |
| 755 | case 0x0: /* MOV_LLT: N^V */ |
| 756 | if (NxorV) |
| 757 | goto take_the_loop; |
| 758 | return; |
| 759 | case 0x1: /* MOV_LGT: ~(Z or (N^V))*/ |
| 760 | if (!((epsw & EPSW_FLAG_Z) | NxorV)) |
| 761 | goto take_the_loop; |
| 762 | return; |
| 763 | case 0x2: /* MOV_LGE: ~(N^V) */ |
| 764 | if (!NxorV) |
| 765 | goto take_the_loop; |
| 766 | return; |
| 767 | case 0x3: /* MOV_LLE: Z or (N^V) */ |
| 768 | if ((epsw & EPSW_FLAG_Z) | NxorV) |
| 769 | goto take_the_loop; |
| 770 | return; |
| 771 | |
| 772 | case 0x4: /* MOV_LCS: C */ |
| 773 | if (epsw & EPSW_FLAG_C) |
| 774 | goto take_the_loop; |
| 775 | return; |
| 776 | case 0x5: /* MOV_LHI: ~(C or Z) */ |
| 777 | if (!(epsw & (EPSW_FLAG_C | EPSW_FLAG_Z))) |
| 778 | goto take_the_loop; |
| 779 | return; |
| 780 | case 0x6: /* MOV_LCC: ~C */ |
| 781 | if (!(epsw & EPSW_FLAG_C)) |
| 782 | goto take_the_loop; |
| 783 | return; |
| 784 | case 0x7: /* MOV_LLS: C or Z */ |
| 785 | if (epsw & (EPSW_FLAG_C | EPSW_FLAG_Z)) |
| 786 | goto take_the_loop; |
| 787 | return; |
| 788 | |
| 789 | case 0x8: /* MOV_LEQ: Z */ |
| 790 | if (epsw & EPSW_FLAG_Z) |
| 791 | goto take_the_loop; |
| 792 | return; |
| 793 | case 0x9: /* MOV_LNE: ~Z */ |
| 794 | if (!(epsw & EPSW_FLAG_Z)) |
| 795 | goto take_the_loop; |
| 796 | return; |
| 797 | case 0xa: /* MOV_LRA: always */ |
| 798 | goto take_the_loop; |
| 799 | |
| 800 | default: |
| 801 | BUG(); |
| 802 | } |
| 803 | |
| 804 | take_the_loop: |
| 805 | /* wind the PC back to just after the SETLB insn */ |
| 806 | kdebug("loop LAR=%lx", regs->lar); |
| 807 | regs->pc = regs->lar - 4; |
| 808 | } |
| 809 | |
| 810 | /* |
David Howells | 9f55588 | 2008-11-12 15:35:04 +0000 | [diff] [blame] | 811 | * misalignment handler tests |
| 812 | */ |
| 813 | #ifdef CONFIG_TEST_MISALIGNMENT_HANDLER |
| 814 | static u8 __initdata testbuf[512] __attribute__((aligned(16))) = { |
| 815 | [257] = 0x11, |
| 816 | [258] = 0x22, |
| 817 | [259] = 0x33, |
| 818 | [260] = 0x44, |
| 819 | }; |
| 820 | |
| 821 | #define ASSERTCMP(X, OP, Y) \ |
| 822 | do { \ |
| 823 | if (unlikely(!((X) OP (Y)))) { \ |
| 824 | printk(KERN_ERR "\n"); \ |
| 825 | printk(KERN_ERR "MISALIGN: Assertion failed at line %u\n", \ |
| 826 | __LINE__); \ |
| 827 | printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n", \ |
| 828 | (unsigned long)(X), (unsigned long)(Y)); \ |
| 829 | BUG(); \ |
| 830 | } \ |
| 831 | } while(0) |
| 832 | |
| 833 | static int __init test_misalignment(void) |
| 834 | { |
| 835 | register void *r asm("e0"); |
| 836 | register u32 y asm("e1"); |
| 837 | void *p = testbuf, *q; |
| 838 | u32 tmp, tmp2, x; |
| 839 | |
| 840 | printk(KERN_NOTICE "==>test_misalignment() [testbuf=%p]\n", p); |
| 841 | p++; |
| 842 | |
| 843 | printk(KERN_NOTICE "___ MOV (Am),Dn ___\n"); |
| 844 | q = p + 256; |
| 845 | asm volatile("mov (%0),%1" : "+a"(q), "=d"(x)); |
| 846 | ASSERTCMP(q, ==, p + 256); |
| 847 | ASSERTCMP(x, ==, 0x44332211); |
| 848 | |
| 849 | printk(KERN_NOTICE "___ MOV (256,Am),Dn ___\n"); |
| 850 | q = p; |
| 851 | asm volatile("mov (256,%0),%1" : "+a"(q), "=d"(x)); |
| 852 | ASSERTCMP(q, ==, p); |
| 853 | ASSERTCMP(x, ==, 0x44332211); |
| 854 | |
| 855 | printk(KERN_NOTICE "___ MOV (Di,Am),Dn ___\n"); |
| 856 | tmp = 256; |
| 857 | q = p; |
| 858 | asm volatile("mov (%2,%0),%1" : "+a"(q), "=d"(x), "+d"(tmp)); |
| 859 | ASSERTCMP(q, ==, p); |
| 860 | ASSERTCMP(x, ==, 0x44332211); |
| 861 | ASSERTCMP(tmp, ==, 256); |
| 862 | |
| 863 | printk(KERN_NOTICE "___ MOV (256,Rm),Rn ___\n"); |
| 864 | r = p; |
| 865 | asm volatile("mov (256,%0),%1" : "+r"(r), "=r"(y)); |
| 866 | ASSERTCMP(r, ==, p); |
| 867 | ASSERTCMP(y, ==, 0x44332211); |
| 868 | |
| 869 | printk(KERN_NOTICE "___ MOV (Rm+),Rn ___\n"); |
| 870 | r = p + 256; |
| 871 | asm volatile("mov (%0+),%1" : "+r"(r), "=r"(y)); |
| 872 | ASSERTCMP(r, ==, p + 256 + 4); |
| 873 | ASSERTCMP(y, ==, 0x44332211); |
| 874 | |
| 875 | printk(KERN_NOTICE "___ MOV (Rm+,8),Rn ___\n"); |
| 876 | r = p + 256; |
| 877 | asm volatile("mov (%0+,8),%1" : "+r"(r), "=r"(y)); |
| 878 | ASSERTCMP(r, ==, p + 256 + 8); |
| 879 | ASSERTCMP(y, ==, 0x44332211); |
| 880 | |
| 881 | printk(KERN_NOTICE "___ MOV (7,SP),Rn ___\n"); |
| 882 | asm volatile( |
| 883 | "add -16,sp \n" |
| 884 | "mov +0x11,%0 \n" |
| 885 | "movbu %0,(7,sp) \n" |
| 886 | "mov +0x22,%0 \n" |
| 887 | "movbu %0,(8,sp) \n" |
| 888 | "mov +0x33,%0 \n" |
| 889 | "movbu %0,(9,sp) \n" |
| 890 | "mov +0x44,%0 \n" |
| 891 | "movbu %0,(10,sp) \n" |
| 892 | "mov (7,sp),%1 \n" |
| 893 | "add +16,sp \n" |
| 894 | : "+a"(q), "=d"(x)); |
| 895 | ASSERTCMP(x, ==, 0x44332211); |
| 896 | |
| 897 | printk(KERN_NOTICE "___ MOV (259,SP),Rn ___\n"); |
| 898 | asm volatile( |
| 899 | "add -264,sp \n" |
| 900 | "mov +0x11,%0 \n" |
| 901 | "movbu %0,(259,sp) \n" |
| 902 | "mov +0x22,%0 \n" |
| 903 | "movbu %0,(260,sp) \n" |
| 904 | "mov +0x33,%0 \n" |
| 905 | "movbu %0,(261,sp) \n" |
| 906 | "mov +0x55,%0 \n" |
| 907 | "movbu %0,(262,sp) \n" |
| 908 | "mov (259,sp),%1 \n" |
| 909 | "add +264,sp \n" |
| 910 | : "+d"(tmp), "=d"(x)); |
| 911 | ASSERTCMP(x, ==, 0x55332211); |
| 912 | |
| 913 | printk(KERN_NOTICE "___ MOV (260,SP),Rn ___\n"); |
| 914 | asm volatile( |
| 915 | "add -264,sp \n" |
| 916 | "mov +0x11,%0 \n" |
| 917 | "movbu %0,(260,sp) \n" |
| 918 | "mov +0x22,%0 \n" |
| 919 | "movbu %0,(261,sp) \n" |
| 920 | "mov +0x33,%0 \n" |
| 921 | "movbu %0,(262,sp) \n" |
| 922 | "mov +0x55,%0 \n" |
| 923 | "movbu %0,(263,sp) \n" |
| 924 | "mov (260,sp),%1 \n" |
| 925 | "add +264,sp \n" |
| 926 | : "+d"(tmp), "=d"(x)); |
| 927 | ASSERTCMP(x, ==, 0x55332211); |
| 928 | |
| 929 | |
| 930 | printk(KERN_NOTICE "___ MOV_LNE ___\n"); |
| 931 | tmp = 1; |
| 932 | tmp2 = 2; |
| 933 | q = p + 256; |
| 934 | asm volatile( |
| 935 | "setlb \n" |
| 936 | "mov %2,%3 \n" |
| 937 | "mov %1,%2 \n" |
| 938 | "cmp +0,%1 \n" |
| 939 | "mov_lne (%0+,4),%1" |
| 940 | : "+r"(q), "+d"(tmp), "+d"(tmp2), "=d"(x) |
| 941 | : |
| 942 | : "cc"); |
| 943 | ASSERTCMP(q, ==, p + 256 + 12); |
| 944 | ASSERTCMP(x, ==, 0x44332211); |
| 945 | |
| 946 | printk(KERN_NOTICE "___ MOV in SETLB ___\n"); |
| 947 | tmp = 1; |
| 948 | tmp2 = 2; |
| 949 | q = p + 256; |
| 950 | asm volatile( |
| 951 | "setlb \n" |
| 952 | "mov %1,%3 \n" |
| 953 | "mov (%0+),%1 \n" |
| 954 | "cmp +0,%1 \n" |
| 955 | "lne " |
| 956 | : "+a"(q), "+d"(tmp), "+d"(tmp2), "=d"(x) |
| 957 | : |
| 958 | : "cc"); |
| 959 | |
| 960 | ASSERTCMP(q, ==, p + 256 + 8); |
| 961 | ASSERTCMP(x, ==, 0x44332211); |
| 962 | |
| 963 | printk(KERN_NOTICE "<==test_misalignment()\n"); |
| 964 | return 0; |
| 965 | } |
| 966 | |
| 967 | arch_initcall(test_misalignment); |
| 968 | |
| 969 | #endif /* CONFIG_TEST_MISALIGNMENT_HANDLER */ |