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- /*
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2020 Western Digital Corporation or its affiliates.
- *
- * Authors:
- * Anup Patel <anup.patel@wdc.com>
- * Atish Patra <atish.patra@wdc.com>
- */
- #include <sbi/riscv_asm.h>
- #include <sbi/sbi_console.h>
- #include <sbi/sbi_domain.h>
- #include <sbi/sbi_ecall.h>
- #include <sbi/sbi_ecall_interface.h>
- #include <sbi/sbi_error.h>
- #include <sbi/sbi_hsm.h>
- #include <sbi/sbi_ipi.h>
- #include <sbi/sbi_platform.h>
- #include <sbi/sbi_system.h>
- #include <sbi/sbi_timer.h>
- #include <sbi/sbi_tlb.h>
- #include <sbi/sbi_trap.h>
- #include <sbi/sbi_unpriv.h>
- #include <sbi/sbi_hart.h>
- static int sbi_load_hart_mask_unpriv(ulong *pmask, ulong *hmask,
- struct sbi_trap_info *uptrap)
- {
- ulong mask = 0;
- if (pmask) {
- mask = sbi_load_ulong(pmask, uptrap);
- if (uptrap->cause)
- return SBI_ETRAP;
- } else {
- sbi_hsm_hart_interruptible_mask(sbi_domain_thishart_ptr(),
- 0, &mask);
- }
- *hmask = mask;
- return 0;
- }
- static int sbi_ecall_legacy_handler(unsigned long extid, unsigned long funcid,
- const struct sbi_trap_regs *regs,
- unsigned long *out_val,
- struct sbi_trap_info *out_trap)
- {
- int ret = 0;
- struct sbi_tlb_info tlb_info;
- u32 source_hart = current_hartid();
- ulong hmask = 0;
- switch (extid) {
- case SBI_EXT_0_1_SET_TIMER:
- #if __riscv_xlen == 32
- sbi_timer_event_start((((u64)regs->a1 << 32) | (u64)regs->a0));
- #else
- sbi_timer_event_start((u64)regs->a0);
- #endif
- break;
- case SBI_EXT_0_1_CONSOLE_PUTCHAR:
- sbi_putc(regs->a0);
- break;
- case SBI_EXT_0_1_CONSOLE_GETCHAR:
- ret = sbi_getc();
- break;
- case SBI_EXT_0_1_CLEAR_IPI:
- sbi_ipi_clear_smode();
- break;
- case SBI_EXT_0_1_SEND_IPI:
- ret = sbi_load_hart_mask_unpriv((ulong *)regs->a0,
- &hmask, out_trap);
- if (ret != SBI_ETRAP)
- ret = sbi_ipi_send_smode(hmask, 0);
- break;
- case SBI_EXT_0_1_REMOTE_FENCE_I:
- ret = sbi_load_hart_mask_unpriv((ulong *)regs->a0,
- &hmask, out_trap);
- if (ret != SBI_ETRAP) {
- SBI_TLB_INFO_INIT(&tlb_info, 0, 0, 0, 0,
- sbi_tlb_local_fence_i,
- source_hart);
- ret = sbi_tlb_request(hmask, 0, &tlb_info);
- }
- break;
- case SBI_EXT_0_1_REMOTE_SFENCE_VMA:
- ret = sbi_load_hart_mask_unpriv((ulong *)regs->a0,
- &hmask, out_trap);
- if (ret != SBI_ETRAP) {
- SBI_TLB_INFO_INIT(&tlb_info, regs->a1, regs->a2, 0, 0,
- sbi_tlb_local_sfence_vma,
- source_hart);
- ret = sbi_tlb_request(hmask, 0, &tlb_info);
- }
- break;
- case SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID:
- ret = sbi_load_hart_mask_unpriv((ulong *)regs->a0,
- &hmask, out_trap);
- if (ret != SBI_ETRAP) {
- SBI_TLB_INFO_INIT(&tlb_info, regs->a1,
- regs->a2, regs->a3, 0,
- sbi_tlb_local_sfence_vma_asid,
- source_hart);
- ret = sbi_tlb_request(hmask, 0, &tlb_info);
- }
- break;
- case SBI_EXT_0_1_SHUTDOWN:
- sbi_system_reset(SBI_SRST_RESET_TYPE_SHUTDOWN,
- SBI_SRST_RESET_REASON_NONE);
- break;
- default:
- ret = SBI_ENOTSUPP;
- };
- return ret;
- }
- struct sbi_ecall_extension ecall_legacy = {
- .extid_start = SBI_EXT_0_1_SET_TIMER,
- .extid_end = SBI_EXT_0_1_SHUTDOWN,
- .handle = sbi_ecall_legacy_handler,
- };
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