sbi_ecall_legacy.c 3.0 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_console.h>
  12. #include <sbi/sbi_domain.h>
  13. #include <sbi/sbi_ecall.h>
  14. #include <sbi/sbi_ecall_interface.h>
  15. #include <sbi/sbi_error.h>
  16. #include <sbi/sbi_hsm.h>
  17. #include <sbi/sbi_ipi.h>
  18. #include <sbi/sbi_platform.h>
  19. #include <sbi/sbi_system.h>
  20. #include <sbi/sbi_timer.h>
  21. #include <sbi/sbi_tlb.h>
  22. #include <sbi/sbi_trap.h>
  23. #include <sbi/sbi_unpriv.h>
  24. #include <sbi/sbi_hart.h>
  25. static int sbi_load_hart_mask_unpriv(ulong *pmask, ulong *hmask,
  26. struct sbi_trap_info *uptrap)
  27. {
  28. ulong mask = 0;
  29. if (pmask) {
  30. mask = sbi_load_ulong(pmask, uptrap);
  31. if (uptrap->cause)
  32. return SBI_ETRAP;
  33. } else {
  34. sbi_hsm_hart_interruptible_mask(sbi_domain_thishart_ptr(),
  35. 0, &mask);
  36. }
  37. *hmask = mask;
  38. return 0;
  39. }
  40. static int sbi_ecall_legacy_handler(unsigned long extid, unsigned long funcid,
  41. const struct sbi_trap_regs *regs,
  42. unsigned long *out_val,
  43. struct sbi_trap_info *out_trap)
  44. {
  45. int ret = 0;
  46. struct sbi_tlb_info tlb_info;
  47. u32 source_hart = current_hartid();
  48. ulong hmask = 0;
  49. switch (extid) {
  50. case SBI_EXT_0_1_SET_TIMER:
  51. #if __riscv_xlen == 32
  52. sbi_timer_event_start((((u64)regs->a1 << 32) | (u64)regs->a0));
  53. #else
  54. sbi_timer_event_start((u64)regs->a0);
  55. #endif
  56. break;
  57. case SBI_EXT_0_1_CONSOLE_PUTCHAR:
  58. sbi_putc(regs->a0);
  59. break;
  60. case SBI_EXT_0_1_CONSOLE_GETCHAR:
  61. ret = sbi_getc();
  62. break;
  63. case SBI_EXT_0_1_CLEAR_IPI:
  64. sbi_ipi_clear_smode();
  65. break;
  66. case SBI_EXT_0_1_SEND_IPI:
  67. ret = sbi_load_hart_mask_unpriv((ulong *)regs->a0,
  68. &hmask, out_trap);
  69. if (ret != SBI_ETRAP)
  70. ret = sbi_ipi_send_smode(hmask, 0);
  71. break;
  72. case SBI_EXT_0_1_REMOTE_FENCE_I:
  73. ret = sbi_load_hart_mask_unpriv((ulong *)regs->a0,
  74. &hmask, out_trap);
  75. if (ret != SBI_ETRAP) {
  76. SBI_TLB_INFO_INIT(&tlb_info, 0, 0, 0, 0,
  77. sbi_tlb_local_fence_i,
  78. source_hart);
  79. ret = sbi_tlb_request(hmask, 0, &tlb_info);
  80. }
  81. break;
  82. case SBI_EXT_0_1_REMOTE_SFENCE_VMA:
  83. ret = sbi_load_hart_mask_unpriv((ulong *)regs->a0,
  84. &hmask, out_trap);
  85. if (ret != SBI_ETRAP) {
  86. SBI_TLB_INFO_INIT(&tlb_info, regs->a1, regs->a2, 0, 0,
  87. sbi_tlb_local_sfence_vma,
  88. source_hart);
  89. ret = sbi_tlb_request(hmask, 0, &tlb_info);
  90. }
  91. break;
  92. case SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID:
  93. ret = sbi_load_hart_mask_unpriv((ulong *)regs->a0,
  94. &hmask, out_trap);
  95. if (ret != SBI_ETRAP) {
  96. SBI_TLB_INFO_INIT(&tlb_info, regs->a1,
  97. regs->a2, regs->a3, 0,
  98. sbi_tlb_local_sfence_vma_asid,
  99. source_hart);
  100. ret = sbi_tlb_request(hmask, 0, &tlb_info);
  101. }
  102. break;
  103. case SBI_EXT_0_1_SHUTDOWN:
  104. sbi_system_reset(SBI_SRST_RESET_TYPE_SHUTDOWN,
  105. SBI_SRST_RESET_REASON_NONE);
  106. break;
  107. default:
  108. ret = SBI_ENOTSUPP;
  109. };
  110. return ret;
  111. }
  112. struct sbi_ecall_extension ecall_legacy = {
  113. .extid_start = SBI_EXT_0_1_SET_TIMER,
  114. .extid_end = SBI_EXT_0_1_SHUTDOWN,
  115. .handle = sbi_ecall_legacy_handler,
  116. };