lib_blackfin/__kgdb.S

   1
   2 #include <asm/linkage.h>
   3
   4 /* save stack context for non-local goto
   5  * int kgdb_setjmp(long *buf)
   6  */
   7
   8 ENTRY(_kgdb_setjmp)
   9         [--SP] = p0;    /* Save P0 */
  10         p0 = r0;
  11         r0 = [SP++];    /* Load P0 into R0 */
  12
  13         [p0 + 0x00] = r0;       /* GP address registers */
  14         [p0 + 0x04] = p1;
  15         [p0 + 0x08] = p2;
  16         [p0 + 0x0C] = p3;
  17         [p0 + 0x10] = p4;
  18         [p0 + 0x14] = p5;
  19         [p0 + 0x18] = FP;       /* frame pointer */
  20         [p0 + 0x1C] = SP;       /* stack pointer */
  21
  22         [p0 + 0x20] = p0;       /* data regs */
  23         [p0 + 0x24] = r1;
  24         [p0 + 0x28] = r2;
  25         [p0 + 0x2C] = r3;
  26         [p0 + 0x30] = r4;
  27         [p0 + 0x34] = r5;
  28         [p0 + 0x38] = r6;
  29         [p0 + 0x3C] = r7;
  30
  31         r0 = ASTAT;     [p0 + 0x40] = r0;
  32
  33         /* loop counters */
  34         r0 = LC0;       [p0 + 0x44] = r0;
  35         r0 = LC1;       [p0 + 0x48] = r0;
  36
  37         /* Accumulator */
  38         r0 = A0.w;      [p0 + 0x4C] = r0;
  39         r0.l = A0.x;    [p0 + 0x50] = r0;
  40         r0 = A1.w;      [p0 + 0x54] = r0;
  41         r0.l = A1.x;    [p0 + 0x58] = r0;
  42
  43         /* index registers */
  44         r0 = i0;        [p0 + 0x5C] = r0;
  45         r0 = i1;        [p0 + 0x60] = r0;
  46         r0 = i2;        [p0 + 0x64] = r0;
  47         r0 = i3;        [p0 + 0x68] = r0;
  48
  49         /* modifier registers */
  50         r0 = m0;        [p0 + 0x6C] = r0;
  51         r0 = m1;        [p0 + 0x70] = r0;
  52         r0 = m2;        [p0 + 0x74] = r0;
  53         r0 = m3;        [p0 + 0x78] = r0;
  54
  55         /* length registers */
  56         r0 = l0;        [p0 + 0x7C] = r0;
  57         r0 = l1;        [p0 + 0x80] = r0;
  58         r0 = l2;        [p0 + 0x84] = r0;
  59         r0 = l3;        [p0 + 0x88] = r0;
  60
  61         /* base registers */
  62         r0 = b0;        [p0 + 0x8C] = r0;
  63         r0 = b1;        [p0 + 0x90] = r0;
  64         r0 = b2;        [p0 + 0x94] = r0;
  65         r0 = b3;        [p0 + 0x98] = r0;
  66
  67         /* store return address */
  68         r0 = RETS;      [p0 + 0x9C] = r0;
  69
  70         R0 = 0;
  71         RTS;
  72 ENDPROC(_kgdb_setjmp)
  73
  74 /*
  75  * non-local jump to a saved stack context
  76  * longjmp(long *buf, int val)
  77  */
  78
  79 ENTRY(_kgdb_longjmp)
  80         p0 = r0;
  81         r0 = [p0 + 0x00];
  82         [--sp] = r0;
  83
  84         /* GP address registers - skip p0 for now*/
  85         p1 = [p0 + 0x04];
  86         p2 = [p0 + 0x08];
  87         p3 = [p0 + 0x0C];
  88         p4 = [p0 + 0x10];
  89         p5 = [p0 + 0x14];
  90         /* frame pointer */
  91         fp = [p0 + 0x18];
  92         /* stack pointer */
  93         r0 = [sp++];
  94         sp = [p0 + 0x1C];
  95         [--sp] = r0;
  96         [--sp] = r1;
  97
  98         /* data regs */
  99         r0 = [p0 + 0x20];
 100         r1 = [p0 + 0x24];
 101         r2 = [p0 + 0x28];
 102         r3 = [p0 + 0x2C];
 103         r4 = [p0 + 0x30];
 104         r5 = [p0 + 0x34];
 105         r6 = [p0 + 0x38];
 106         r7 = [p0 + 0x3C];
 107
 108         r0 = [p0 + 0x40];       ASTAT = r0;
 109
 110         /* loop counters */
 111         r0 = [p0 + 0x44];       LC0 = r0;
 112         r0 = [p0 + 0x48];       LC1 = r0;
 113
 114         /* Accumulator */
 115         r0 = [p0 + 0x4C];       A0.w = r0;
 116         r0 = [p0 + 0x50];       A0.x = r0;
 117         r0 = [p0 + 0x54];       A1.w = r0;
 118         r0 = [p0 + 0x58];       A1.x = r0;
 119
 120         /* index registers */
 121         r0 = [p0 + 0x5C];       i0 = r0;
 122         r0 = [p0 + 0x60];       i1 = r0;
 123         r0 = [p0 + 0x64];       i2 = r0;
 124         r0 = [p0 + 0x68];       i3 = r0;
 125
 126         /* modifier registers */
 127         r0 = [p0 + 0x6C];       m0 = r0;
 128         r0 = [p0 + 0x70];       m1 = r0;
 129         r0 = [p0 + 0x74];       m2 = r0;
 130         r0 = [p0 + 0x78];       m3 = r0;
 131
 132         /* length registers */
 133         r0 = [p0 + 0x7C];       l0 = r0;
 134         r0 = [p0 + 0x80];       l1 = r0;
 135         r0 = [p0 + 0x84];       l2 = r0;
 136         r0 = [p0 + 0x88];       l3 = r0;
 137
 138         /* base registers */
 139         r0 = [p0 + 0x8C];       b0 = r0;
 140         r0 = [p0 + 0x90];       b1 = r0;
 141         r0 = [p0 + 0x94];       b2 = r0;
 142         r0 = [p0 + 0x98];       b3 = r0;
 143
 144         /* store return address */
 145         r0 = [p0 + 0x9C];       RETS = r0;
 146
 147         /* fixup R0 & P0 */
 148         r0 = [sp++];
 149         p0 = [sp++];
 150         CC = R0 == 0;
 151         IF !CC JUMP .Lfinished;
 152         R0 = 1;
 153 .Lfinished:
 154         RTS;
 155 ENDPROC(_kgdb_longjmp)