sbi_ecall_replace.c 5.1 KB

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  1. /*
  2. * SPDX-License-Identifier: BSD-2-Clause
  3. *
  4. * Copyright (c) 2020 Western Digital Corporation or its affiliates.
  5. *
  6. * Authors:
  7. * Anup Patel <anup.patel@wdc.com>
  8. * Atish Patra <atish.patra@wdc.com>
  9. */
  10. #include <sbi/riscv_asm.h>
  11. #include <sbi/sbi_ecall.h>
  12. #include <sbi/sbi_ecall_interface.h>
  13. #include <sbi/sbi_error.h>
  14. #include <sbi/sbi_hart.h>
  15. #include <sbi/sbi_ipi.h>
  16. #include <sbi/sbi_system.h>
  17. #include <sbi/sbi_timer.h>
  18. #include <sbi/sbi_tlb.h>
  19. #include <sbi/sbi_trap.h>
  20. static int sbi_ecall_time_handler(unsigned long extid, unsigned long funcid,
  21. const struct sbi_trap_regs *regs,
  22. unsigned long *out_val,
  23. struct sbi_trap_info *out_trap)
  24. {
  25. int ret = 0;
  26. if (funcid == SBI_EXT_TIME_SET_TIMER) {
  27. #if __riscv_xlen == 32
  28. sbi_timer_event_start((((u64)regs->a1 << 32) | (u64)regs->a0));
  29. #else
  30. sbi_timer_event_start((u64)regs->a0);
  31. #endif
  32. } else
  33. ret = SBI_ENOTSUPP;
  34. return ret;
  35. }
  36. struct sbi_ecall_extension ecall_time = {
  37. .extid_start = SBI_EXT_TIME,
  38. .extid_end = SBI_EXT_TIME,
  39. .handle = sbi_ecall_time_handler,
  40. };
  41. static int sbi_ecall_rfence_handler(unsigned long extid, unsigned long funcid,
  42. const struct sbi_trap_regs *regs,
  43. unsigned long *out_val,
  44. struct sbi_trap_info *out_trap)
  45. {
  46. int ret = 0;
  47. unsigned long vmid;
  48. struct sbi_tlb_info tlb_info;
  49. u32 source_hart = current_hartid();
  50. if (funcid >= SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA &&
  51. funcid <= SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID)
  52. if (!misa_extension('H'))
  53. return SBI_ENOTSUPP;
  54. switch (funcid) {
  55. case SBI_EXT_RFENCE_REMOTE_FENCE_I:
  56. SBI_TLB_INFO_INIT(&tlb_info, 0, 0, 0, 0,
  57. sbi_tlb_local_fence_i, source_hart);
  58. ret = sbi_tlb_request(regs->a0, regs->a1, &tlb_info);
  59. break;
  60. case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA:
  61. SBI_TLB_INFO_INIT(&tlb_info, regs->a2, regs->a3, 0, 0,
  62. sbi_tlb_local_hfence_gvma, source_hart);
  63. ret = sbi_tlb_request(regs->a0, regs->a1, &tlb_info);
  64. break;
  65. case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID:
  66. SBI_TLB_INFO_INIT(&tlb_info, regs->a2, regs->a3, 0, regs->a4,
  67. sbi_tlb_local_hfence_gvma_vmid,
  68. source_hart);
  69. ret = sbi_tlb_request(regs->a0, regs->a1, &tlb_info);
  70. break;
  71. case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA:
  72. vmid = (csr_read(CSR_HGATP) & HGATP_VMID_MASK);
  73. vmid = vmid >> HGATP_VMID_SHIFT;
  74. SBI_TLB_INFO_INIT(&tlb_info, regs->a2, regs->a3, 0, vmid,
  75. sbi_tlb_local_hfence_vvma, source_hart);
  76. ret = sbi_tlb_request(regs->a0, regs->a1, &tlb_info);
  77. break;
  78. case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID:
  79. vmid = (csr_read(CSR_HGATP) & HGATP_VMID_MASK);
  80. vmid = vmid >> HGATP_VMID_SHIFT;
  81. SBI_TLB_INFO_INIT(&tlb_info, regs->a2, regs->a3, regs->a4,
  82. vmid, sbi_tlb_local_hfence_vvma_asid,
  83. source_hart);
  84. ret = sbi_tlb_request(regs->a0, regs->a1, &tlb_info);
  85. break;
  86. case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA:
  87. SBI_TLB_INFO_INIT(&tlb_info, regs->a2, regs->a3, 0, 0,
  88. sbi_tlb_local_sfence_vma, source_hart);
  89. ret = sbi_tlb_request(regs->a0, regs->a1, &tlb_info);
  90. break;
  91. case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID:
  92. SBI_TLB_INFO_INIT(&tlb_info, regs->a2, regs->a3, regs->a4, 0,
  93. sbi_tlb_local_sfence_vma_asid, source_hart);
  94. ret = sbi_tlb_request(regs->a0, regs->a1, &tlb_info);
  95. break;
  96. default:
  97. ret = SBI_ENOTSUPP;
  98. };
  99. return ret;
  100. }
  101. struct sbi_ecall_extension ecall_rfence = {
  102. .extid_start = SBI_EXT_RFENCE,
  103. .extid_end = SBI_EXT_RFENCE,
  104. .handle = sbi_ecall_rfence_handler,
  105. };
  106. static int sbi_ecall_ipi_handler(unsigned long extid, unsigned long funcid,
  107. const struct sbi_trap_regs *regs,
  108. unsigned long *out_val,
  109. struct sbi_trap_info *out_trap)
  110. {
  111. int ret = 0;
  112. if (funcid == SBI_EXT_IPI_SEND_IPI)
  113. ret = sbi_ipi_send_smode(regs->a0, regs->a1);
  114. else
  115. ret = SBI_ENOTSUPP;
  116. return ret;
  117. }
  118. struct sbi_ecall_extension ecall_ipi = {
  119. .extid_start = SBI_EXT_IPI,
  120. .extid_end = SBI_EXT_IPI,
  121. .handle = sbi_ecall_ipi_handler,
  122. };
  123. static int sbi_ecall_srst_handler(unsigned long extid, unsigned long funcid,
  124. const struct sbi_trap_regs *regs,
  125. unsigned long *out_val,
  126. struct sbi_trap_info *out_trap)
  127. {
  128. if (funcid == SBI_EXT_SRST_RESET) {
  129. if ((((u32)-1U) <= ((u64)regs->a0)) ||
  130. (((u32)-1U) <= ((u64)regs->a1)))
  131. return SBI_EINVAL;
  132. switch (regs->a0) {
  133. case SBI_SRST_RESET_TYPE_SHUTDOWN:
  134. case SBI_SRST_RESET_TYPE_COLD_REBOOT:
  135. case SBI_SRST_RESET_TYPE_WARM_REBOOT:
  136. break;
  137. default:
  138. return SBI_ENOTSUPP;
  139. }
  140. switch (regs->a1) {
  141. case SBI_SRST_RESET_REASON_NONE:
  142. case SBI_SRST_RESET_REASON_SYSFAIL:
  143. break;
  144. default:
  145. return SBI_ENOTSUPP;
  146. }
  147. if (sbi_system_reset_supported(regs->a0, regs->a1))
  148. sbi_system_reset(regs->a0, regs->a1);
  149. }
  150. return SBI_ENOTSUPP;
  151. }
  152. static int sbi_ecall_srst_probe(unsigned long extid, unsigned long *out_val)
  153. {
  154. u32 type, count = 0;
  155. /*
  156. * At least one standard reset types should be supported by
  157. * the platform for SBI SRST extension to be usable.
  158. */
  159. for (type = 0; type <= SBI_SRST_RESET_TYPE_LAST; type++) {
  160. if (sbi_system_reset_supported(type,
  161. SBI_SRST_RESET_REASON_NONE))
  162. count++;
  163. }
  164. *out_val = (count) ? 1 : 0;
  165. return 0;
  166. }
  167. struct sbi_ecall_extension ecall_srst = {
  168. .extid_start = SBI_EXT_SRST,
  169. .extid_end = SBI_EXT_SRST,
  170. .handle = sbi_ecall_srst_handler,
  171. .probe = sbi_ecall_srst_probe,
  172. };