arch/blackfin/include/asm/entry.h

   1 /*
   2  * entry.h - routines for context saving and restoring (for interrupts/exceptions)
   3  *
   4  * Copyright (c) 2005-2007 Analog Devices Inc.
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #ifndef __BLACKFIN_ENTRY_H
  10 #define __BLACKFIN_ENTRY_H
  11 #ifdef __ASSEMBLY__
  12
  13 #define SAVE_ALL_INT            save_context_no_interrupts
  14 #define SAVE_ALL_SYS            save_context_no_interrupts
  15 #define SAVE_CONTEXT            save_context_with_interrupts
  16
  17 #define RESTORE_ALL             restore_context_no_interrupts
  18 #define RESTORE_ALL_SYS         restore_context_no_interrupts
  19 #define RESTORE_CONTEXT         restore_context_with_interrupts
  20
  21 /*
  22  * Code to save processor context.
  23  * We even save the register which are preserved by a function call
  24  * - r4, r5, r6, r7, p3, p4, p5
  25  */
  26 .macro save_context_with_interrupts
  27         [--sp] = R0;
  28         [--sp] = ( R7:0, P5:0 );
  29         [--sp] = fp;
  30         [--sp] = usp;
  31
  32         [--sp] = i0;
  33         [--sp] = i1;
  34         [--sp] = i2;
  35         [--sp] = i3;
  36
  37         [--sp] = m0;
  38         [--sp] = m1;
  39         [--sp] = m2;
  40         [--sp] = m3;
  41
  42         [--sp] = l0;
  43         [--sp] = l1;
  44         [--sp] = l2;
  45         [--sp] = l3;
  46
  47         [--sp] = b0;
  48         [--sp] = b1;
  49         [--sp] = b2;
  50         [--sp] = b3;
  51         [--sp] = a0.x;
  52         [--sp] = a0.w;
  53         [--sp] = a1.x;
  54         [--sp] = a1.w;
  55
  56         [--sp] = LC0;
  57         [--sp] = LC1;
  58         [--sp] = LT0;
  59         [--sp] = LT1;
  60         [--sp] = LB0;
  61         [--sp] = LB1;
  62
  63         [--sp] = ASTAT;
  64
  65         [--sp] = r0;    /* Skip reserved */
  66         [--sp] = RETS;
  67         [--sp] = RETI;
  68         [--sp] = RETX;
  69         [--sp] = RETN;
  70         [--sp] = RETE;
  71         [--sp] = SEQSTAT;
  72         [--sp] = SYSCFG;
  73 #ifdef CONFIG_CMD_KGDB
  74         p0.l = lo(IPEND)
  75         p0.h = hi(IPEND)
  76         r0 = [p0];
  77 #endif
  78         [--sp] = r0;    /* Skip IPEND as well. */
  79 .endm
  80
  81 .macro save_context_no_interrupts
  82         [--sp] = R0;
  83         [--sp] = ( R7:0, P5:0 );
  84         [--sp] = fp;
  85         [--sp] = usp;
  86
  87         [--sp] = i0;
  88         [--sp] = i1;
  89         [--sp] = i2;
  90         [--sp] = i3;
  91
  92         [--sp] = m0;
  93         [--sp] = m1;
  94         [--sp] = m2;
  95         [--sp] = m3;
  96
  97         [--sp] = l0;
  98         [--sp] = l1;
  99         [--sp] = l2;
 100         [--sp] = l3;
 101
 102         [--sp] = b0;
 103         [--sp] = b1;
 104         [--sp] = b2;
 105         [--sp] = b3;
 106         [--sp] = a0.x;
 107         [--sp] = a0.w;
 108         [--sp] = a1.x;
 109         [--sp] = a1.w;
 110
 111         [--sp] = LC0;
 112         [--sp] = LC1;
 113         [--sp] = LT0;
 114         [--sp] = LT1;
 115         [--sp] = LB0;
 116         [--sp] = LB1;
 117
 118         [--sp] = ASTAT;
 119
 120         [--sp] = r0;    /* Skip reserved */
 121         [--sp] = RETS;
 122         r0 = RETI;
 123         [--sp] = r0;
 124         [--sp] = RETX;
 125         [--sp] = RETN;
 126         [--sp] = RETE;
 127         [--sp] = SEQSTAT;
 128         [--sp] = SYSCFG;
 129 #ifdef CONFIG_CMD_KGDB
 130         p0.l = lo(IPEND)
 131         p0.h = hi(IPEND)
 132         r0 = [p0];
 133 #endif
 134         [--sp] = r0;    /* Skip IPEND as well. */
 135 .endm
 136
 137 .macro restore_context_no_interrupts
 138         sp += 4;
 139         SYSCFG = [sp++];
 140         SEQSTAT = [sp++];
 141         RETE = [sp++];
 142         RETN = [sp++];
 143         RETX = [sp++];
 144         r0 = [sp++];
 145         RETI = r0;
 146         RETS = [sp++];
 147
 148         sp += 4;
 149
 150         ASTAT = [sp++];
 151
 152         LB1 = [sp++];
 153         LB0 = [sp++];
 154         LT1 = [sp++];
 155         LT0 = [sp++];
 156         LC1 = [sp++];
 157         LC0 = [sp++];
 158
 159         a1.w = [sp++];
 160         a1.x = [sp++];
 161         a0.w = [sp++];
 162         a0.x = [sp++];
 163         b3 = [sp++];
 164         b2 = [sp++];
 165         b1 = [sp++];
 166         b0 = [sp++];
 167
 168         l3 = [sp++];
 169         l2 = [sp++];
 170         l1 = [sp++];
 171         l0 = [sp++];
 172
 173         m3 = [sp++];
 174         m2 = [sp++];
 175         m1 = [sp++];
 176         m0 = [sp++];
 177
 178         i3 = [sp++];
 179         i2 = [sp++];
 180         i1 = [sp++];
 181         i0 = [sp++];
 182
 183         sp += 4;
 184         fp = [sp++];
 185
 186         ( R7 : 0, P5 : 0) = [ SP ++ ];
 187         sp += 4;
 188 .endm
 189
 190 .macro restore_context_with_interrupts
 191         sp += 4;
 192         SYSCFG = [sp++];
 193         SEQSTAT = [sp++];
 194         RETE = [sp++];
 195         RETN = [sp++];
 196         RETX = [sp++];
 197         RETI = [sp++];
 198         RETS = [sp++];
 199
 200         sp += 4;
 201
 202         ASTAT = [sp++];
 203
 204         LB1 = [sp++];
 205         LB0 = [sp++];
 206         LT1 = [sp++];
 207         LT0 = [sp++];
 208         LC1 = [sp++];
 209         LC0 = [sp++];
 210
 211         a1.w = [sp++];
 212         a1.x = [sp++];
 213         a0.w = [sp++];
 214         a0.x = [sp++];
 215         b3 = [sp++];
 216         b2 = [sp++];
 217         b1 = [sp++];
 218         b0 = [sp++];
 219
 220         l3 = [sp++];
 221         l2 = [sp++];
 222         l1 = [sp++];
 223         l0 = [sp++];
 224
 225         m3 = [sp++];
 226         m2 = [sp++];
 227         m1 = [sp++];
 228         m0 = [sp++];
 229
 230         i3 = [sp++];
 231         i2 = [sp++];
 232         i1 = [sp++];
 233         i0 = [sp++];
 234
 235         sp += 4;
 236         fp = [sp++];
 237
 238         ( R7 : 0, P5 : 0) = [ SP ++ ];
 239         sp += 4;
 240 .endm
 241
 242 #endif
 243 #endif