entry.h 3.5 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243
  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. #ifndef __BLACKFIN_ENTRY_H
  9. #define __BLACKFIN_ENTRY_H
  10. #ifdef __ASSEMBLY__
  11. #define SAVE_ALL_INT save_context_no_interrupts
  12. #define SAVE_ALL_SYS save_context_no_interrupts
  13. #define SAVE_CONTEXT save_context_with_interrupts
  14. #define RESTORE_ALL restore_context_no_interrupts
  15. #define RESTORE_ALL_SYS restore_context_no_interrupts
  16. #define RESTORE_CONTEXT restore_context_with_interrupts
  17. /*
  18. * Code to save processor context.
  19. * We even save the register which are preserved by a function call
  20. * - r4, r5, r6, r7, p3, p4, p5
  21. */
  22. .macro save_context_with_interrupts
  23. [--sp] = R0;
  24. [--sp] = ( R7:0, P5:0 );
  25. [--sp] = fp;
  26. [--sp] = usp;
  27. [--sp] = i0;
  28. [--sp] = i1;
  29. [--sp] = i2;
  30. [--sp] = i3;
  31. [--sp] = m0;
  32. [--sp] = m1;
  33. [--sp] = m2;
  34. [--sp] = m3;
  35. [--sp] = l0;
  36. [--sp] = l1;
  37. [--sp] = l2;
  38. [--sp] = l3;
  39. [--sp] = b0;
  40. [--sp] = b1;
  41. [--sp] = b2;
  42. [--sp] = b3;
  43. [--sp] = a0.x;
  44. [--sp] = a0.w;
  45. [--sp] = a1.x;
  46. [--sp] = a1.w;
  47. [--sp] = LC0;
  48. [--sp] = LC1;
  49. [--sp] = LT0;
  50. [--sp] = LT1;
  51. [--sp] = LB0;
  52. [--sp] = LB1;
  53. [--sp] = ASTAT;
  54. [--sp] = r0; /* Skip reserved */
  55. [--sp] = RETS;
  56. [--sp] = RETI;
  57. [--sp] = RETX;
  58. [--sp] = RETN;
  59. [--sp] = RETE;
  60. [--sp] = SEQSTAT;
  61. [--sp] = SYSCFG;
  62. #ifdef CONFIG_CMD_KGDB
  63. p0.l = lo(IPEND)
  64. p0.h = hi(IPEND)
  65. r0 = [p0];
  66. #endif
  67. [--sp] = r0; /* Skip IPEND as well. */
  68. .endm
  69. .macro save_context_no_interrupts
  70. [--sp] = R0;
  71. [--sp] = ( R7:0, P5:0 );
  72. [--sp] = fp;
  73. [--sp] = usp;
  74. [--sp] = i0;
  75. [--sp] = i1;
  76. [--sp] = i2;
  77. [--sp] = i3;
  78. [--sp] = m0;
  79. [--sp] = m1;
  80. [--sp] = m2;
  81. [--sp] = m3;
  82. [--sp] = l0;
  83. [--sp] = l1;
  84. [--sp] = l2;
  85. [--sp] = l3;
  86. [--sp] = b0;
  87. [--sp] = b1;
  88. [--sp] = b2;
  89. [--sp] = b3;
  90. [--sp] = a0.x;
  91. [--sp] = a0.w;
  92. [--sp] = a1.x;
  93. [--sp] = a1.w;
  94. [--sp] = LC0;
  95. [--sp] = LC1;
  96. [--sp] = LT0;
  97. [--sp] = LT1;
  98. [--sp] = LB0;
  99. [--sp] = LB1;
  100. [--sp] = ASTAT;
  101. [--sp] = r0; /* Skip reserved */
  102. [--sp] = RETS;
  103. r0 = RETI;
  104. [--sp] = r0;
  105. [--sp] = RETX;
  106. [--sp] = RETN;
  107. [--sp] = RETE;
  108. [--sp] = SEQSTAT;
  109. [--sp] = SYSCFG;
  110. #ifdef CONFIG_CMD_KGDB
  111. p0.l = lo(IPEND)
  112. p0.h = hi(IPEND)
  113. r0 = [p0];
  114. #endif
  115. [--sp] = r0; /* Skip IPEND as well. */
  116. .endm
  117. .macro restore_context_no_interrupts
  118. sp += 4;
  119. SYSCFG = [sp++];
  120. SEQSTAT = [sp++];
  121. RETE = [sp++];
  122. RETN = [sp++];
  123. RETX = [sp++];
  124. r0 = [sp++];
  125. RETI = r0;
  126. RETS = [sp++];
  127. sp += 4;
  128. ASTAT = [sp++];
  129. LB1 = [sp++];
  130. LB0 = [sp++];
  131. LT1 = [sp++];
  132. LT0 = [sp++];
  133. LC1 = [sp++];
  134. LC0 = [sp++];
  135. a1.w = [sp++];
  136. a1.x = [sp++];
  137. a0.w = [sp++];
  138. a0.x = [sp++];
  139. b3 = [sp++];
  140. b2 = [sp++];
  141. b1 = [sp++];
  142. b0 = [sp++];
  143. l3 = [sp++];
  144. l2 = [sp++];
  145. l1 = [sp++];
  146. l0 = [sp++];
  147. m3 = [sp++];
  148. m2 = [sp++];
  149. m1 = [sp++];
  150. m0 = [sp++];
  151. i3 = [sp++];
  152. i2 = [sp++];
  153. i1 = [sp++];
  154. i0 = [sp++];
  155. sp += 4;
  156. fp = [sp++];
  157. ( R7 : 0, P5 : 0) = [ SP ++ ];
  158. sp += 4;
  159. .endm
  160. .macro restore_context_with_interrupts
  161. sp += 4;
  162. SYSCFG = [sp++];
  163. SEQSTAT = [sp++];
  164. RETE = [sp++];
  165. RETN = [sp++];
  166. RETX = [sp++];
  167. RETI = [sp++];
  168. RETS = [sp++];
  169. sp += 4;
  170. ASTAT = [sp++];
  171. LB1 = [sp++];
  172. LB0 = [sp++];
  173. LT1 = [sp++];
  174. LT0 = [sp++];
  175. LC1 = [sp++];
  176. LC0 = [sp++];
  177. a1.w = [sp++];
  178. a1.x = [sp++];
  179. a0.w = [sp++];
  180. a0.x = [sp++];
  181. b3 = [sp++];
  182. b2 = [sp++];
  183. b1 = [sp++];
  184. b0 = [sp++];
  185. l3 = [sp++];
  186. l2 = [sp++];
  187. l1 = [sp++];
  188. l0 = [sp++];
  189. m3 = [sp++];
  190. m2 = [sp++];
  191. m1 = [sp++];
  192. m0 = [sp++];
  193. i3 = [sp++];
  194. i2 = [sp++];
  195. i1 = [sp++];
  196. i0 = [sp++];
  197. sp += 4;
  198. fp = [sp++];
  199. ( R7 : 0, P5 : 0) = [ SP ++ ];
  200. sp += 4;
  201. .endm
  202. #endif
  203. #endif