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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 | /* * entry.h - routines for context saving and restoring (for interrupts/exceptions) * * Copyright (c) 2005-2007 Analog Devices Inc. * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, * MA 02110-1301 USA */ #ifndef __BLACKFIN_ENTRY_H #define __BLACKFIN_ENTRY_H #ifdef __ASSEMBLY__ #define SAVE_ALL_INT save_context_no_interrupts #define SAVE_ALL_SYS save_context_no_interrupts #define SAVE_CONTEXT save_context_with_interrupts #define RESTORE_ALL restore_context_no_interrupts #define RESTORE_ALL_SYS restore_context_no_interrupts #define RESTORE_CONTEXT restore_context_with_interrupts /* * Code to save processor context. * We even save the register which are preserved by a function call * - r4, r5, r6, r7, p3, p4, p5 */ .macro save_context_with_interrupts [--sp] = R0; [--sp] = ( R7:0, P5:0 ); [--sp] = fp; [--sp] = usp; [--sp] = i0; [--sp] = i1; [--sp] = i2; [--sp] = i3; [--sp] = m0; [--sp] = m1; [--sp] = m2; [--sp] = m3; [--sp] = l0; [--sp] = l1; [--sp] = l2; [--sp] = l3; [--sp] = b0; [--sp] = b1; [--sp] = b2; [--sp] = b3; [--sp] = a0.x; [--sp] = a0.w; [--sp] = a1.x; [--sp] = a1.w; [--sp] = LC0; [--sp] = LC1; [--sp] = LT0; [--sp] = LT1; [--sp] = LB0; [--sp] = LB1; [--sp] = ASTAT; [--sp] = r0; /* Skip reserved */ [--sp] = RETS; [--sp] = RETI; [--sp] = RETX; [--sp] = RETN; [--sp] = RETE; [--sp] = SEQSTAT; [--sp] = SYSCFG; [--sp] = r0; /* Skip IPEND as well. */ .endm .macro save_context_no_interrupts [--sp] = R0; [--sp] = ( R7:0, P5:0 ); [--sp] = fp; [--sp] = usp; [--sp] = i0; [--sp] = i1; [--sp] = i2; [--sp] = i3; [--sp] = m0; [--sp] = m1; [--sp] = m2; [--sp] = m3; [--sp] = l0; [--sp] = l1; [--sp] = l2; [--sp] = l3; [--sp] = b0; [--sp] = b1; [--sp] = b2; [--sp] = b3; [--sp] = a0.x; [--sp] = a0.w; [--sp] = a1.x; [--sp] = a1.w; [--sp] = LC0; [--sp] = LC1; [--sp] = LT0; [--sp] = LT1; [--sp] = LB0; [--sp] = LB1; [--sp] = ASTAT; [--sp] = r0; /* Skip reserved */ [--sp] = RETS; r0 = RETI; [--sp] = r0; [--sp] = RETX; [--sp] = RETN; [--sp] = RETE; [--sp] = SEQSTAT; [--sp] = SYSCFG; [--sp] = r0; /* Skip IPEND as well. */ .endm .macro restore_context_no_interrupts sp += 4; SYSCFG = [sp++]; SEQSTAT = [sp++]; RETE = [sp++]; RETN = [sp++]; RETX = [sp++]; r0 = [sp++]; RETI = r0; RETS = [sp++]; sp += 4; ASTAT = [sp++]; LB1 = [sp++]; LB0 = [sp++]; LT1 = [sp++]; LT0 = [sp++]; LC1 = [sp++]; LC0 = [sp++]; a1.w = [sp++]; a1.x = [sp++]; a0.w = [sp++]; a0.x = [sp++]; b3 = [sp++]; b2 = [sp++]; b1 = [sp++]; b0 = [sp++]; l3 = [sp++]; l2 = [sp++]; l1 = [sp++]; l0 = [sp++]; m3 = [sp++]; m2 = [sp++]; m1 = [sp++]; m0 = [sp++]; i3 = [sp++]; i2 = [sp++]; i1 = [sp++]; i0 = [sp++]; sp += 4; fp = [sp++]; ( R7 : 0, P5 : 0) = [ SP ++ ]; sp += 4; .endm .macro restore_context_with_interrupts sp += 4; SYSCFG = [sp++]; SEQSTAT = [sp++]; RETE = [sp++]; RETN = [sp++]; RETX = [sp++]; RETI = [sp++]; RETS = [sp++]; sp += 4; ASTAT = [sp++]; LB1 = [sp++]; LB0 = [sp++]; LT1 = [sp++]; LT0 = [sp++]; LC1 = [sp++]; LC0 = [sp++]; a1.w = [sp++]; a1.x = [sp++]; a0.w = [sp++]; a0.x = [sp++]; b3 = [sp++]; b2 = [sp++]; b1 = [sp++]; b0 = [sp++]; l3 = [sp++]; l2 = [sp++]; l1 = [sp++]; l0 = [sp++]; m3 = [sp++]; m2 = [sp++]; m1 = [sp++]; m0 = [sp++]; i3 = [sp++]; i2 = [sp++]; i1 = [sp++]; i0 = [sp++]; sp += 4; fp = [sp++]; ( R7 : 0, P5 : 0) = [ SP ++ ]; sp += 4; .endm #endif #endif |